JP2017208089A - Assembly design support device, computer program for tolerance setting, computer program for tolerance analysis, and assembly design support method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembly design support device which is excellent in operability and functionality, and which can be easily used by a designer, and which makes it possible for a third person to easily confirm the content of analysis.SOLUTION: In an assembly design support device 1, a CPU 14 comprises: first display means 21 for displaying a numerical value for design and an attribute key for instructing the collection of information related to a numerical value for design for each attribute; design numerical value selection reception means 22 for receiving the selection of the numerical value for design; attribute key selection reception means 23 for receiving the selection of the attribute key; second display means 24, 25 for displaying the information related to the numerical value for design in a table prior to analysis for each attribute; information writing instruction means 26 for instructing the batch writing of the information related to the numerical value for design in a tolerance analysis table for each attribute: and third display means 27 for displaying the information related to the numerical value for design in the tolerance analysis table.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an assembly design support apparatus for supporting the design of an assembly, a tolerance setting computer program that can be installed and used in the apparatus, a tolerance analysis computer program that can be installed and used in the apparatus, and the like The present invention relates to an assembly design support method performed using an apparatus.

  Conventionally, when assembling each part constituting an assembly, a technique for performing tolerance analysis using CAD (Computer Aided Design) data has been used to prevent assembly failure or malfunction due to dimensional tolerance of each part. It has been. Generally, software (computer program) for performing tolerance analysis includes high-end software belonging to a high price range of 4 to 10 million yen and mid-range software belonging to a mid-price range of 1 to 3 million yen. Broadly divided. High-end tolerance analysis software enables full-spec output, and automatically calculates the difference between the hole diameter and pin diameter (also referred to as gap or backlash) and lever ratio (also referred to as leverage). There are many features that make it possible to make On the other hand, many mid-range tolerance analysis software is characterized by low specifications and easy operation.

  The person who understands the interrelation between the parts constituting the assembly and the structure of the assembly is the designer of the assembly. The high-end tolerance analysis software has a huge number of man-hours for operation, and the operation method is difficult. For this reason, it is difficult for a designer to use high-end tolerance analysis software in the design work, and a person who specializes in tolerance analysis uses high-end tolerance analysis software. On the other hand, the software for mid-range tolerance analysis is a simple product that can be operated by a designer, but has a problem of lack of full functionality. Furthermore, both types of tolerance analysis software have a problem that it is difficult for a third party other than the person who performed the tolerance analysis to confirm.

  In order to solve such a problem, the user is allowed to define the assembly definition and the degree of freedom of each part of the assembly, and based on the assembly definition and the degree of freedom of each part, the number and method of the normal direction in the assembly direction of each part For tolerance analysis that counts the number of degrees of freedom of translational constraint in the linear direction and the number of degrees of freedom of axis rotation restraint orthogonal to the normal, determines the datum type corresponding to the count value, and outputs the determined datum type Software is known (see Patent Document 1). There is also a design support program that allows the designer to estimate the cumulative assembly accuracy without having to select the assembly position of each part, enter tolerances, and set the assembly sequence each time, reducing the burden on the designer. (See Patent Document 2).

JP 2011-258008 A JP2012-155424A

  The technique disclosed in Patent Document 1 has an advantage that a tolerance analysis result can be easily reflected in creation of an assembly instruction for parts. Further, the technique disclosed in Patent Document 2 has an advantage that it is easy to use by reducing the input of the designer. However, after information transfer from CAD software to tolerance analysis software, a designer easily performs tolerance analysis, and a third party has not easily confirmed the contents of the analysis. For this reason, it is strongly recommended that CAD software and tolerance analysis software be more closely linked so that designers can easily use tolerance analysis software and third parties can easily check the contents of the analysis. It has been demanded.

  The present invention has been made in view of the above problems, and is an assembly design support device, a tolerance setting computer program, a tolerance analysis computer program, and an assembly that are excellent in operability and functionality and can be easily used by a designer. The purpose is to provide a product design support method.

(Assembly design support device)
(1) An assembly design support apparatus according to an embodiment for achieving the above object is an assembly design support apparatus that includes a central processing unit and a memory, and supports the design of an assembly. Designed for each attribute that shares the positioning of design numerical values in the analysis of the tolerance of at least one of the numerical values that represent the form of the parts that make up the product and the numerical values that represent the distance between the parts. An attribute key for instructing to collect information related to a numerical value; a first display means for displaying; a numerical value selection receiving means for receiving a selection of a numerical value for design; an attribute key receiving a selection of the attribute key An analysis in which information related to the design numerical values received by the design numerical value selection receiving means is displayed before the tolerance analysis for each attribute received by the selection receiving means; and the attribute key selection receiving means Second display means for displaying on the table; information writing instruction means for instructing to write information related to the numerical values for design together for each attribute in the tolerance analysis table for analyzing the tolerance; and information writing instruction means And a third display means for displaying information related to the design numerical value in the tolerance analysis table.

(2) The assembly design support device according to another embodiment may further include an ID assigning unit that assigns an ID unique to the attribute to information related to the numerical value for design.

(3) The assembly design support apparatus according to another embodiment may further include an address assigning unit that assigns an address to information related to a plurality of design numerical values. The information writing instruction means can issue an instruction to write information related to the numerical value for design at a location corresponding to the address.

(4) The assembly design support device according to another embodiment also includes a dimensional tolerance presence / absence determining unit that determines whether or not a dimensional tolerance is included in the numerical value for design displayed by the first display unit; When it is determined by the tolerance presence / absence determining means that the dimension tolerance is included, it is determined that the dimension tolerance is not included by the display tolerance priority means that obtains the dimension tolerance with priority and the dimension tolerance presence / absence determining means. In this case, first standard tolerance reading means for reading out and obtaining a predetermined standard tolerance from the memory may be provided. The second display means can display the dimension tolerance preferentially acquired by the display tolerance priority means or the standard tolerance acquired by the first standard tolerance reading means on the pre-analysis table.

(5) In the assembly design support apparatus according to another embodiment, the second display means is a means for displaying a plurality of options for each level of a predetermined standard tolerance, and the memory has a standard tolerance. May be a means for storing a plurality of types for each level. The assembly design support apparatus includes a standard tolerance level selection receiving unit that receives a selection from options, and a second standard tolerance reading unit that reads out from the memory the standard tolerance of the level received by the standard tolerance level selection receiving unit. Further, it may be provided. The second display means can display the standard tolerance read by the second standard tolerance reading means.

(6) In the assembly design support device according to another embodiment, the attribute may include a combination of a diameter of a hole in the assembly and a diameter of a pin inserted into the hole. The above assembly design support device calculates a dimensional difference between the median value of the hole diameter within the tolerance range and the median value of the pin diameter within the tolerance range based on the hole diameter and the pin diameter. -You may further provide a pin diameter size difference calculation means. The second display means or the third display means can display the dimensional difference.

(7) In the assembly design support device according to another embodiment, the attribute may include a lever ratio that is positioned as a sensitivity to a dimensional tolerance. The assembly design support apparatus may further include a coefficient calculation formula creating unit that creates a coefficient calculation formula that allows a coefficient used for tolerance analysis to be set based on a lever ratio. The second display means can display the automatic setting of the coefficient using the coefficient calculation formula so as to be selectable in the pre-analysis table.

(8) In the assembly design support apparatus according to another embodiment, the attribute may include a geometric tolerance that is positioned as a range of allowable deviation from an ideal shape, posture, or position of the part. The assembly design support device may further include a geometric tolerance half-value calculating unit that calculates a half value of the geometric tolerance displayed by the first display unit. The second display means or the third display means can display the half value of the geometric tolerance as plus and minus.

(9) The assembly design support apparatus according to another embodiment also sets or calculates a contribution ratio obtained by quantifying a ratio that contributes to the overall tolerance for each part tolerance that affects the overall tolerance of the assembly. A contribution rate setting / calculation unit and a contribution rate dependent tolerance calculation unit that calculates the tolerance displayed in the tolerance analysis table depending on the contribution rate may be further provided.

(10) In the assembly design support device according to another embodiment, the tolerance analysis table also displays a contribution ratio selection key for calculating a tolerance based on one of two or more contribution ratios. May be. The assembly design support device may further include contribution rate selection accepting means for accepting selection of one of two or more contribution rate selection keys. The contribution rate dependent tolerance calculating means can perform calculation based on the selection from the contribution rate selection key.

(11) The assembly design support device according to another embodiment also includes a calculation target exclusion instruction receiving unit that receives an instruction to exclude one or more of the tolerances from the target of the contribution rate dependent tolerance calculation unit, and a calculation target exclusion You may further provide the tolerance fixing means which fixes the tolerance received by the instruction | indication reception means. The contribution rate-dependent tolerance calculating means can calculate a tolerance dependent on the contribution rate for other tolerances except for the tolerance fixed by the tolerance fixing means.

(12) The assembly design support device according to another embodiment further includes an information input / change receiving unit for receiving input of information into the tolerance analysis table or a change of information already input, and an information input / change receiving unit. And an information update display means for displaying the information received in place of the original information.

(13) In the assembly design support device according to another embodiment, the first display means can display a tolerance analysis selection key that can be selected for each tolerance analysis, and the memory is for each tolerance analysis. In addition, design numerical values necessary for the analysis may be stored. The assembly design support device described above receives tolerance analysis selection key receiving means for accepting one selection of a tolerance analysis selection key, and reads a design numerical value corresponding to the tolerance analysis received by the tolerance analysis selection key receiving means from the memory. Design numerical value reading means may be further provided. The first display means can display the design numerical value read by the design numerical value reading means.

(14) The assembly design support device according to another embodiment may further include analysis result comparison display means for comparing and displaying the analysis results for each tolerance analysis.

(15) In the assembly design support device according to another embodiment, the first display means can display an attribute display form change key capable of changing the display form for each attribute, and the memory is for each attribute. Further, the display form of the numerical value for design related to the attribute may be stored in association with each other. The assembly design support device includes an attribute display form change key receiving unit that accepts one selection of the attribute display form change key, and accesses the information in the memory to change the attribute received by the attribute display form change key receiving unit. You may further provide the display form change means which changes the display form of the numerical value for design related with the display form of the numerical value for design related to another attribute. The first display means can display the design numerical values changed by the display form changing means.

(16) The assembly design support device according to another embodiment is also received by the in-table information designation accepting means for accepting designation of information in the tolerance analysis table or the pre-analysis table, and the in-table information designation accepting means. Further, it may further include design numerical value display form changing means that is information that matches the information and that is displayed by changing the design numerical value displayed by the first display means with other design numerical values.

(17) The assembly design support device according to another embodiment also includes a one-side tolerance presence / absence judging means for judging whether or not a design value includes a one-side tolerance, and a one-side tolerance. And a one-side tolerance calculating means for obtaining a half value of the one-side tolerance. The second display means or the third display means can display the half value of the one-side tolerance as plus or minus as the tolerance.

(Tolerance setting computer program)
(18) A tolerance setting computer program according to an embodiment is installed in a computer including a central processing unit and a memory, and is at least one of a numerical value representing a form of a part constituting the assembly and a numerical value representing a distance between the parts. This is a tolerance setting computer program that can set the tolerance of one design numerical value, and the computer is related to the design numerical value for each attribute that shares the positioning of the design numerical value with the design numerical value in the tolerance analysis. Attribute key for instructing to collect information to be collected; first display means for displaying; design numerical value selection receiving means for receiving selection of design numerical value; attribute key selection receiving means for receiving selection of attribute key; attribute key For each attribute accepted by the selection accepting means, it relates to the design numerical value accepted by the design numerical value accepting means. Second display means for displaying information in a pre-analysis table displayed before tolerance analysis; and an instruction to write information related to design numerical values collectively for each attribute in a tolerance analysis table for analyzing tolerances Function as an information writing instruction means to be performed.

(19) A tolerance setting computer program according to another embodiment may further cause a computer to function as an ID assigning unit that assigns an ID specific to an attribute to information related to a numerical value for design.

(20) The tolerance setting computer program according to another embodiment may further cause the computer to function as address providing means for assigning addresses to information related to a plurality of design numerical values. The information writing instruction means can issue an instruction to write information related to the numerical value for design at a location corresponding to the address.

(21) A tolerance setting computer program according to another embodiment further includes a dimensional tolerance presence / absence discriminating means for discriminating whether or not the design numerical value displayed by the first display means includes a dimensional tolerance. If the dimensional tolerance is determined to be included by the dimensional tolerance determining means, the display tolerance priority means for acquiring the dimensional tolerance with priority; and the dimensional tolerance determining means does not include the dimensional tolerance. If it is determined, it may further function as first standard tolerance reading means for reading out and acquiring a predetermined standard tolerance from the memory. The second display means can display the dimension tolerance preferentially acquired by the display tolerance priority means or the standard tolerance acquired by the first standard tolerance reading means on the pre-analysis table.

(22) In the tolerance setting computer program according to another embodiment, the second display means is means for displaying a plurality of choices for a predetermined standard tolerance for each level, and the memory has a standard tolerance. May be a means for storing a plurality of types for each level. The tolerance setting computer program includes a standard tolerance level selection accepting unit that accepts a selection from options, and a second standard tolerance reading unit that reads out the standard tolerance of the level accepted by the standard tolerance level selection accepting unit from the memory. As such, it may be further functioned. The second display means can display the standard tolerance read by the second standard tolerance reading means.

(23) In the tolerance setting computer program according to another embodiment, the attribute may include a combination of a diameter of a hole in the assembly and a diameter of a pin inserted into the hole. The above tolerance setting computer program calculates the dimensional difference between the median hole diameter within the tolerance range and the pin diameter median within the tolerance range based on the hole diameter and the pin diameter. You may make it function further as a hole and pin diameter size difference calculation means to calculate. The second display means can display the dimensional difference.

(24) In the tolerance setting computer program according to another embodiment, the attribute may include a lever ratio positioned as a sensitivity to the dimensional tolerance. The above-described tolerance setting computer program may further cause the computer to function as a coefficient calculation formula creating means for creating a coefficient calculation formula that allows a coefficient used for tolerance analysis to be set based on a lever ratio. The second display means can display the automatic setting of the coefficient using the coefficient calculation formula so as to be selectable in the pre-analysis table.

(25) In the tolerance setting computer program according to another embodiment, the attribute may include a geometric tolerance that is positioned as a range of allowable deviation from an ideal shape, posture, or position of a part. The above-described tolerance setting computer program may further cause the computer to function as a geometric tolerance half-value calculating means for calculating the half value of the geometric tolerance displayed by the first display means. The second display means can display the half value of the geometric tolerance as plus and minus.

(26) In the tolerance setting computer program according to another embodiment, the first display means may be capable of displaying a tolerance analysis selection key that can be selected for each tolerance analysis. The tolerance setting computer program stores from the memory a numerical value for design corresponding to the analysis of the tolerance received by the tolerance analysis selection key receiving means for accepting selection of one of the tolerance analysis selection keys and the tolerance analysis selection key receiving means. You may make it function further as a numerical value reading means for a design to read. The first display means can display the design numerical value read by the design numerical value reading means.

(27) In the tolerance setting computer program according to another embodiment, the first display means can display an attribute display form change key capable of changing the display form for each attribute, and the memory is provided for each attribute. Further, the display form of the numerical value for design related to the attribute may be stored in association with each other. The tolerance setting computer program accesses the computer to attribute display form change key receiving means for accepting selection of one of the attribute display form change keys, and the attribute received by the attribute display form change key receiving means. It may be further made to function as a display form changing means for changing the display form of the numerical value for design related to the display form of the numerical value for design related to other attributes. The first display means can display the design numerical values changed by the display form changing means.

(28) In the tolerance setting computer program according to another embodiment, the information received by the in-table information designation accepting means and the in-table information designation accepting means for accepting designation of information in the pre-analysis table. The numerical value for design displayed by the first display means may be further functioned as a numerical value display form changing means for design that displays the information by changing it from the other numerical values for design.

(29) The tolerance setting computer program according to another embodiment also includes a one-side tolerance presence / absence judging means for judging whether the design numerical value includes one-side tolerance, and one-side tolerance. In this case, it may be further functioned as a one-side tolerance calculation means for obtaining a half value of one-side tolerance. The second display means can display the half value of the one-sided tolerance as plus and minus as the tolerance.

(Computer program for tolerance analysis)
(30) A tolerance analysis computer program according to an embodiment is installed in a computer including a central processing unit and a memory, and at least one of a numerical value indicating a form of a part constituting an assembly and a numerical value indicating a distance between the parts. It is a tolerance analysis computer program capable of analyzing a tolerance in conjunction with a tolerance setting computer program capable of setting a tolerance of one design numerical value. The tolerance setting computer program includes an attribute key for instructing the computer to collect information related to the design numerical value for each attribute that shares the position of the numerical value for design and the design numerical value in the analysis of the tolerance, First display means for displaying; design numerical value selection receiving means for receiving selection of numerical values for design; attribute key selection receiving means for receiving selection of attribute keys; for each attribute received by the attribute key selection receiving means, for design Second display means for displaying information related to the numerical value for design received by the numerical value selection receiving means in the pre-analysis table displayed before the tolerance analysis; and the numerical value for design in the tolerance analysis table for analyzing the tolerance Is a computer program that functions as information writing instruction means for instructing to collectively write information related to each attribute. The computer program for tolerance analysis causes the computer to function as third display means for displaying information related to the numerical values for design in the tolerance analysis table in accordance with the information writing instruction means.

(31) A tolerance analysis computer program according to another embodiment sets or calculates a contribution ratio obtained by quantifying a ratio that contributes to an overall tolerance for each tolerance of a part that affects the overall tolerance of an assembly. It is also possible to further function as contribution rate setting / calculation means for performing the calculation, and contribution rate dependent tolerance calculation means for calculating the tolerance displayed in the tolerance analysis table depending on the contribution rate.

(32) In the computer program for tolerance analysis according to another embodiment, the tolerance analysis table may display a contribution ratio selection key for calculating a tolerance based on one of two or more contribution ratios. good. The above-described tolerance analysis computer program may further cause the computer to function as contribution rate selection accepting means for accepting selection of one of two or more contribution rate selection keys. The contribution rate dependent tolerance calculating means can perform calculation based on the selection from the contribution rate selection key.

(33) A computer program for tolerance analysis according to another embodiment includes a calculation target exclusion instruction receiving unit that receives an instruction to exclude one or more of the tolerances from the target of the contribution rate dependent tolerance calculation unit, and a calculation target You may make it function further as a tolerance fixing means which fixes the tolerance received from the exclusion instruction | indication reception means. The contribution rate-dependent tolerance calculating means can calculate a tolerance dependent on the contribution rate for other tolerances except for the tolerance fixed by the tolerance fixing means.

(34) A computer program for tolerance analysis according to another embodiment includes an information input / change receiving means for receiving information input to a tolerance analysis table or a change of information already input, and information input / change receiving. The information received by the means may be further functioned as information update display means for displaying the information instead of the original information.
(35) The tolerance analysis computer program according to another embodiment may further cause the computer to function as an analysis result comparison display unit that compares and displays each analysis result for each tolerance analysis.

(Assembly design support method)
(36) An assembly design support method according to an embodiment is an apparatus including a central processing unit and a memory, and is an assembly design support method performed using an assembly design support apparatus for supporting design of an assembly. In addition, at least one of the numerical values representing the form of the parts constituting the assembly and the numerical values representing the distance between the parts, and the positioning of the numerical values for the design in the analysis of the tolerance of the numerical values for the design are shared. An attribute key for instructing to collect information related to the numerical value for design for each attribute to be displayed; a first display step for displaying; a numerical value selection receiving step for design for receiving selection of the numerical value for design; Attribute key selection acceptance step for accepting selection; for each attribute accepted in the attribute key selection acceptance step, the design numeric value accepted in the design numeric value selection acceptance step Second display step to display the information to be displayed in the pre-analysis table displayed before the tolerance analysis; an instruction to write the information related to the numerical values for design together into the tolerance analysis table for analyzing the tolerances for each attribute And a third display step for displaying information related to the numerical values for design in the tolerance analysis table after the information writing instruction step.

(Assembly design support device)
(37) An assembly design support device according to an embodiment is the assembly design support device according to any one of (1) to (6) described above, and the attribute includes a lever ratio positioned as a sensitivity to a dimensional tolerance. Each point / direction selection receiving means for receiving a selection of a fulcrum, a variation point, a measurement point, and a measurement direction as three types of points necessary for calculating the lever ratio from the user, and each point / direction selection receiving means A coordinate specifying means for specifying at least the coordinates of the three received points, and a first distance in the measurement direction between the fulcrum and the measurement point from each of the coordinates specified by the coordinate specification means, A ratio calculating means for calculating a ratio divided by the second distance between the coefficient, a coefficient receiving means for receiving a coefficient necessary for obtaining the lever ratio from a user, a ratio calculated by the ratio calculating means, and a coefficient receiving means Therefore the accepted coefficient and the first lever ratio calculating means for calculating a lever ratio with may further include a.
(38) In the assembly design support device according to one embodiment of the assembly design support device according to one embodiment, the attribute includes a lever ratio positioned as a sensitivity to a dimensional tolerance. The second distance between the fulcrum and the variation point necessary for calculating the lever ratio, the third distance between the fulcrum and the measurement point, and the angle connecting the measurement point through the fulcrum from the variation point are received from the user. Using each distance / angle receiving means, coefficient receiving means for receiving a coefficient necessary for obtaining the lever ratio from the user, each numerical value received by each distance / angle receiving means, and a coefficient received by the coefficient receiving means And a second lever ratio calculating means for calculating the lever ratio.
(39) An assembly design support apparatus according to an embodiment includes an element reception unit that receives a plurality of elements at an analysis location, and an analysis in one of the above-described assembly design support apparatuses (1) to (6). Visualization instruction determination means for determining whether or not an instruction for visualization of the location has been received from the user, and visualization display means for performing visualization display that makes the analysis location stand out when there is a visualization instruction as a result of the visualization instruction determination means; May be further provided.

  According to the present invention, an assembly design support apparatus, a tolerance setting computer program, and a tolerance analysis computer that are excellent in operability and functionality, can be used easily by a designer, and can be easily confirmed by a third party. A program and an assembly design support method can be provided.

FIG. 1 shows a block diagram of a preferred embodiment of an assembly design support apparatus according to the present invention. FIG. 2 shows a flow of main processing performed using the assembly design support apparatus of FIG. FIG. 3 shows a screen or a part of the screen displayed in accordance with each process of FIG. FIG. 4 shows a screen or a part of the screen displayed in accordance with each process of FIG. FIG. 5 shows a screen or a part of the screen displayed in accordance with each process of FIG. FIG. 6 shows a screen or a part of the screen displayed in accordance with each process of FIG. FIG. 7 shows a screen or a part of the screen displayed in accordance with each process of FIG. FIG. 8 shows a screen or a part of the screen displayed in accordance with each process of FIG. FIG. 9 shows a screen or a part of the screen displayed in accordance with each process of FIG. FIG. 10 shows a screen or a part of the screen displayed in accordance with each process of FIG. FIG. 11 shows a screen or a part of the screen displayed in accordance with each process of FIG. FIG. 12 shows a screen or a part of the screen displayed in accordance with each process of FIG. FIG. 13 shows a processing flow (13A) of a tolerance priority display function that can be performed using the assembly design support apparatus of FIG. 1 and a diagram (13B) for explaining the function. FIG. 14 shows a processing flow (14A) of a display function classified by standard tolerance levels and a diagram (14B) explaining selection from standard tolerances classified by level, which can be performed using the assembly design support apparatus of FIG. . FIG. 15 is a diagram for explaining standard tolerances at each level stored in the memory. (15A) shows a situation in which tolerance information other than holes and pins is read, and (15B) shows tolerance information unique to the holes and pins. The situation of reading is shown respectively. FIG. 16 is a modification of the standard tolerance level display function that can be performed using the assembly design support apparatus of FIG. 1, and shows a processing flow (16A) when a standard tolerance of a predetermined level is selected in the confirmation table. FIG. 16B is a diagram illustrating selection from standard tolerances by level. FIG. 17 is a diagram illustrating the standard tolerance of each level stored in the memory. FIG. 18 shows a processing flow (18A) of a hole / pin diameter dimensional difference display function that can be performed using the assembly design support apparatus of FIG. 1 and a diagram (18B) for explaining the function. FIG. 19 shows a processing flow (19A) of a modified example of the function shown in FIG. 18 and a diagram (19B) for explaining the function. FIG. 20 shows a processing flow (20A) of a coefficient calculation formula creation function that can be performed using the assembly design support apparatus of FIG. 1 and a diagram (20B) for explaining the function. FIG. 21 shows a processing flow (21A) of the geometric tolerance half-value calculation function that can be performed using the assembly design support apparatus of FIG. 1 and a diagram (21B) for explaining the function. FIG. 22 shows a processing flow (22A) of a modification of the function shown in FIG. 21 and a diagram (22B) for explaining the function. FIG. 23 exemplifies the processing flow of the contribution rate-dependent tolerance allocation function that can be performed using the assembly design support device of FIG. FIG. 24 is a diagram illustrating an example in which tolerance allocation is performed using the contribution ratio for Σ. FIG. 25 is a diagram illustrating an example in which tolerance is allocated using a contribution ratio for √. FIG. 26 shows a modification of the flow of FIG. FIG. 27 is a diagram illustrating an example of performing tolerance allocation based on the contribution rate according to the flow of FIG. FIG. 28 shows a processing flow (28A) of a tolerance analysis result reflecting function that can be performed using the assembly design support apparatus of FIG. 1 and a diagram (28B) illustrating the function. FIG. 29 is a processing flow (29A) of the numerical value switching function for design by analysis that can be performed using the assembly design support apparatus of FIG. 1, and a diagram (29B) illustrating the situation of switching the numerical value for design, respectively. Show. FIG. 30 shows a processing flow (30A) of the attribute display form change function that can be performed using the assembly design support device of FIG. 1 and a figure (30B) that explains the state of changing the display form. FIG. 31 shows a processing flow (31A) of the numerical value display form changing function for design that can be performed by using the assembly design support apparatus of FIG. 1 and a view (31B) explaining the state of changing the display form. FIG. 32 shows a modified example (32A) of the flow of (31A) and a diagram (32B) illustrating a situation in which the display form is changed according to the modified example. FIG. 33 shows a processing flow (33A) of the one-side tolerance change display function that can be performed using the assembly design support device of FIG. 1 and a diagram (33B) for explaining the processing. FIG. 34 shows a processing flow (34A) of an analysis result comparison display function that can be performed using the assembly design support apparatus of FIG. 1 and a diagram (34B) illustrating an operation for exerting the display function. FIG. 35 shows an example of the analysis result displayed following the operation (34B). FIG. 36 shows a partial modification of the tolerance analysis table of FIG. FIG. 37 shows examples (37A, 37B, 37C) of graphs displayed by selecting and instructing keys outside the margin of the tolerance analysis table of FIG. FIG. 38 shows a block diagram of a preferred embodiment of another assembly design support apparatus according to the present invention. FIG. 39 shows the flow of each process of the first lever ratio automatic calculation function performed by the assembly design support device of FIG. FIG. 40 shows an image of the assembly displayed to the user when the first lever ratio automatic calculation function according to the flow of FIG. 39 is used. FIG. 41 shows input forms (41A, 41B) for the user to instruct or input when the first lever ratio automatic calculation function according to the flow of FIG. 39 is used. FIG. 42 shows a flow of each process of the second lever ratio automatic calculation function performed by the assembly design support device of FIG. FIG. 43 shows a 3D model of an assembly showing lever ratio attributes. FIG. 44 shows input forms (44A, 44B) for the user to instruct or input when the second lever ratio automatic calculation function according to the flow of FIG. 42 is used. FIG. 45 shows a flow of the analysis location display function. FIG. 46 shows an example of a screen instructed by the user when performing FIG. FIG. 47 shows a screen example (47A) in a state in which an analysis location is displayed and a diagram (47B) for explaining a situation of switching between display and non-display alternately.

  Next, embodiments of an assembly design support device, a tolerance setting computer program, a tolerance analysis computer program, and an assembly design support method according to the present invention will be described with reference to the drawings. Note that the embodiments described below do not limit the invention according to the claims, and all the elements and combinations thereof described in the embodiments are essential to the solution means of the present invention. Not necessarily.

1. Definition (1) Numerical value for design In the present application, the “numerical value for design” is at least one of a numerical value (A) representing the form of the parts constituting the assembly and a numerical value (B) representing the distance between the parts. It is a numerical value. The numerical value (A) is a numerical value that quantitatively represents, for example, the size, angle, roundness, curvature, dimensional ratio, elastic modulus, hardness, or the like of a part or the whole of a part. The numerical value (B) refers to a numerical value that quantitatively represents, for example, the size, angle, dimensional ratio, elastic modulus ratio between two or more parts. The numerical value (A) and the numerical value (B) are not limited to the above examples as long as they are numerical values that quantitatively represent the position, size, shape, physical properties, etc., inside or outside one component or between components. The “design numerical value” may be a numerical value not including tolerance, a numerical value including tolerance, or a tolerance itself.

(2) Tolerance and one-sided tolerance Tolerance refers to the range of fluctuation allowed in design from an accurate numerical value (also called “ideal numerical value” or “reference value”). Tolerances can be broadly divided into dimensional tolerances and geometrical tolerances. The reference value generally takes a center value (also referred to as a median value; hereinafter the same) within a fluctuation range, but is not necessarily a center value. For example, “1 ± 0.1” defines a tolerance of “0.2” from the maximum value “1.1” to the minimum value “0.9” with the reference value “1”. In such a case, the reference value “1” is the center value of the maximum value “1.1” and the minimum value “0.9”. On the other hand, “1 + 0.1, −0.05” defines a tolerance of “0.15” from the maximum value “1.1” to the minimum value “0.95” with the reference value “1”. It is. In such a case, the reference value “1” is not the center value of the maximum value “1.1” and the minimum value “0.95”. In the present application, the “tolerance” is not limited to the allowable range before and after the reference value, but only the allowable range before the reference value (the side smaller than the reference value) or after the reference value (the side larger than the reference value). It is interpreted in a broad sense to include only the allowable range. Further, the “one-side tolerance” means a tolerance having a difference between a positive side (= increasing side) width and a negative side (= decreasing side) width with respect to a reference value. For example, “9.0 ± 0.1” is not a numerical value having a one-sided tolerance because each width on the plus side and the minus side is equal to “0.1” with respect to the reference value “9.0”. On the other hand, “9.0 + 0.1, −0.4” has a plus side width of “0.1” and a minus side width of “0.4” with respect to the reference value “9.0”. Since the widths thereof are different, the numerical value has a one-sided tolerance.

(3) Dimensional tolerance Dimensional tolerance is an allowable fluctuation range of a predetermined distance (also referred to as “reference dimension”). Dimensions are synonymous with length or distance.

(4) Geometric Tolerance Geometric tolerance is defined by JIS B 0021 shape tolerance (straightness, flatness, roundness, cylindricity, line contour and surface contour), posture tolerance (parallelism, straightness). Angle, slope, line contour and surface contour), position tolerance (position, concentricity, coaxiality, symmetry, line contour and surface contour), runout tolerance (circular runout and total runout) It is interpreted in a broad sense to include (vibration). The geometrical tolerance referred to in the present application may include, for example, a fluctuation range of physical properties (hardness, elastic modulus, bending strength, etc.) of a part in addition to the various tolerances defined in JIS B0021. Unlike the dimensional tolerance, the geometric tolerance may not have a large meaning in the reference value in the tolerance analysis. On the other hand, as for the dimensional tolerance, the reference value has a meaning in the tolerance analysis.

(5) Attribute In the present application, “attribute” simply means the property of sharing the position of the design numerical value in the analysis of the tolerance of the numerical value for design. When calculating the meshing amount of two gears in an assembly assembled from a plurality of parts, the calculation includes the distance between the rotation centers of each gear, the radius of each gear, and the diameter of the rotation shaft of each gear and its gear. The numerical values for design such as the position and size of both gears and other related parts such as the difference from the diameter of the hole into which the rotary shaft is inserted and the position of other parts that contact or apply pressure to each gear are related. Since each design value has a tolerance, in order for the two gears in the assembly to mesh properly and rotate, the design value tolerances of both gears and parts related to both gears are accumulated, and the target To meet the overall tolerance. Such an analysis is called tolerance analysis. In the tolerance analysis, the numerical values for design of each part are not divided into the same positions in analysis, but are divided into several groups having common positions. This group is called an attribute. For example, the degree of contour of a curved part of a certain bending member belongs to the attribute “geometric tolerance”. The difference between the diameter of the hole at the center of rotation of the gear and the diameter of the shaft inserted into the hole (referred to as a hole / pin diameter difference) belongs to the attribute “hole / pin (back)”. In addition, when the elongated part is in contact with the two meshing gears substantially horizontally and the end of the elongated part is fixed, the vertical movement of the fixed position of the end part affects the meshing of the gear. , 100% sensitivity may not be affected. In such a case, the sensitivity that affects the meshing of the gear is called “lever ratio”. The ratio of the predetermined length of the elongated part belongs to the attribute “lever ratio”. Furthermore, various dimensions related to the meshing of both gears belong to an attribute called “dimension on calculation formula”. In this way, attributes for grouping design numerical values that share the same position in tolerance analysis include “geometric tolerance”, “hole / pin (back)”, “lever ratio” and “dimensions on calculation formula” Can be exemplified, but is not limited to these four types. For example, “slip” and “elastic modulus” may be included in the attribute.

(6) Overall tolerance In a given tolerance analysis, the sum of the tolerances of the related parts is referred to as “total tolerance”. The total tolerance includes a value obtained by simply adding each tolerance (represented by Σ) and a value obtained by adding the square of each tolerance to obtain a square root (represented by √).

2. Configuration of Assembly Design Support Device FIG. 1 is a configuration diagram of a preferred embodiment of an assembly design support device according to the present invention. The configurations shown in FIG. 1 are mainly classified by function, and do not represent the exact hardware of the apparatus.

  The assembly design support device 1 includes a central processing unit (CPU) 14 and a memory 11 and is a device for supporting design of an assembly. The memory 11 is a tolerance setting computer program 81 capable of setting a tolerance of at least one design numerical value among CAD data of an assembly, a numerical value indicating the form of a part constituting the assembly, and a numerical value indicating a distance between the parts. The computer program 82 for tolerance analysis that can analyze the tolerance in conjunction with the computer program 81 for tolerance setting, and other components are stored. Examples of other information include information necessary for performing various functions described later. The memory 11 is preferably a hard disk drive (HDD), a solid state drive (SSD) using flash memory, a memory (EEPROM) that can erase or rewrite data by voltage operation, a readable / writable memory (RAM), or the like. It is formed by one type or two or more types of representative storage devices. Note that the unilaterally read information is preferably stored in a data read-only memory (ROM), which is an example of the memory 11, instead of the HDD, SSD, EEPROM, or RAM.

  The assembly design support apparatus 1 includes an input unit 10 represented by a keyboard, a touch panel, a pointing device, a voice input device, and the like. The assembly design support apparatus 1 includes a monitor 12 represented by a cathode ray tube (CRT), a liquid crystal display (LCD), a plasma display (PDP), an organic EL, and the like. For this reason, a user using the assembly design support apparatus 1 inputs necessary information, selects information, deletes information, changes information, or changes information through the input unit 10 while confirming information displayed on the monitor 12. You can send commands. The assembly design support apparatus 1 preferably reads a tolerance setting computer program 81 and a tolerance analysis computer program 82 recorded in an information recording medium 80 typified by a magnetic disk or an optical disk, and stores them in the memory 11. An information reading device 13 capable of storing each is provided. The assembly design support device 1 is preferably a computer, more preferably a personal computer (PC), but is not limited thereto.

  In this embodiment, the tolerance setting computer program 81 may be CAD (2D or 3D, but preferably 3D) or viewer itself, or CAD or viewer (hereinafter referred to as “CAD etc.”). A computer program that can expand functions such as CAD by adding in (also referred to as add-on) may be used. A more preferable tolerance setting computer program 81 is a computer program capable of expanding functions such as CAD. The tolerance setting computer program 81 is preferably a computer program that can be added into any CAD or the like when taking the form of a computer program capable of expanding the functions of CAD or the like. The tolerance analysis computer program 82 is a computer program for performing tolerance analysis. One of the features of the assembly design support apparatus 1 is that the tolerance setting computer program 81 and the tolerance analysis computer program 82 are linked to facilitate the design and the analysis of the tolerance, and the tolerance by the designer himself / herself. It is possible to support design including analysis.

  As shown in FIG. 1, preferably, the CPU 14 functionally includes a first display unit 21, a numerical value selection receiving unit 22 for design, an attribute key selection receiving unit 23, an information input table display unit 24, a confirmation table display unit 25, Information writing instruction unit 26, tolerance analysis table display unit 27, ID assigning unit 28, address assigning unit 29, dimensional tolerance presence / absence discriminating unit 30, display tolerance priority unit 31, first standard tolerance reading unit 32, standard tolerance level selection acceptance Unit 33, second standard tolerance reading unit 34, hole / pin diameter dimensional difference calculating unit 35, coefficient calculation formula creating unit 36, geometric tolerance half-value calculating unit 37, contribution rate setting / calculating unit 38, contribution rate dependent tolerance calculating unit 39 , Contribution rate selection receiving unit 40, calculation object exclusion instruction receiving unit 41, tolerance fixing unit 42, information input / change receiving unit 43, tolerance analysis selection receiving unit 44, design numerical value reading unit 45, analysis result list display unit 46, attribute Display form change receiving unit 47, display form changing unit 48, in-table information designation receiving unit 49, design numerical display form changing unit 50, one-side tolerance presence / absence determining unit 51, one-side tolerance calculating unit 52, CAD file receiving unit 53, design Numerical value selection determination unit 54, confirmation table display instruction determination unit 55, all attribute setting determination unit 56, attribute selection determination unit 57, input determination unit 58, input reception / display unit 59, setting key input determination unit 60, additional change determination Unit 61, additional change information reception / display unit 62, tolerance analysis table display instruction determination unit 63, ID / address confirmation unit 64, standard tolerance level selection determination unit 65, contribution rate selection determination unit 66, calculation target exclusion selection determination unit 67 , Information input / change determination unit 68, information update display unit 69, tolerance analysis selection determination unit 70, attribute display form change determination unit 71, in-table information designation determination unit 72, analysis result one A display selection determination unit 73, the analysis result list display selection acceptance section 74 and the display maintenance unit 75.

(1) In a simple configuration example, the assembly design support device 1 is preferably the first display unit 21, the design numerical value selection receiving unit 22, the attribute key among the functional configuration units 21 to 75 of the CPU 14. A selection receiving unit 23, at least one of an information input table display unit 24 and a confirmation table display unit 25, an information writing instruction unit 26, and a tolerance analysis table display unit 27 are provided.

  The first display unit 21 positions the design numerical value in the analysis of the tolerance of at least one of the numerical value representing the form of the parts constituting the assembly and the numerical value representing the distance between the parts, and the numerical value for the design. It is an exemplary configuration part of the first display means for displaying an attribute key for instructing to collect information related to the numerical value for design for each attribute having the same. Here, the “information related to the numerical value for design” includes at least the numerical value for design and information other than the numerical value for design that is related to the numerical value for design (tolerance, number, name entered by the user, etc.). Including either one. The design numerical value selection receiving unit 22 is an exemplary configuration unit of a design numerical value selection receiving unit that receives selection of a predetermined design numerical value from the design numerical values displayed on the monitor 12. In this case, the numerical value for design is preferably displayed on the monitor 12 together with a two-dimensional (2D) or three-dimensional (3D) image of the assembly so that it can be selected from the input unit 10. The attribute key selection receiving unit 23 is an exemplary configuration unit of an attribute key selection receiving unit that receives a selection of one or more attribute keys displayed on the monitor 12. In this case, the attribute key is preferably displayed on the monitor 12 so that it can be selected from the input unit 10 at a position different from the two-dimensional (2D) or three-dimensional (3D) image of the assembly (for example, around the display screen). Has been. For each attribute received by the attribute key selection receiving unit 23, the information input table display unit 24 displays information related to the design numerical value received by the design numerical value selection receiving unit 22 before the tolerance analysis. It is an example composition part of the 2nd display means displayed on an information input table (an example of a table before analysis). The confirmation table display unit 25 displays, for each attribute received by the attribute key selection receiving unit 23, information related to the design numerical value received by the design numerical value selection receiving unit 22 before the tolerance analysis. It is an example structural part of the 2nd display means displayed on a confirmation table (an example of a table before analysis). Here, both the information input table and the confirmation table belong to the pre-analysis table. In this embodiment, the confirmation table is a table displayed at a later time point in time series of the information input table. The user can display the tolerance analysis table on the monitor 12 through the display of the information input table and the display of the confirmation table. The tolerance analysis table may be displayed after displaying only the information input table or only the confirmation table. In such a case, the second display means is only the information input table display unit 24 or only the confirmation table display unit 25.

  The information writing instruction unit 26 is an exemplary configuration unit of an information writing instruction unit that instructs to write information related to design numerical values collectively for each attribute in a tolerance analysis table for analyzing tolerances. That is, the CPU 14 instructs the information writing instruction unit 26 to write information related to the numerical value for design into the tolerance analysis table in a state of being grouped in attribute units. This instruction is preferably performed in the form of information transmission from the tolerance setting computer program 81 side to the tolerance analysis computer program 82 side through the processing of the CPU 14. The tolerance analysis table display unit 27 is an exemplary component of third display means for displaying information related to design numerical values in the tolerance analysis table in accordance with the information writing instruction unit 26. This process is a process that the CPU 14 mainly performs while reading the tolerance analysis computer program 82.

(2) The assembly design support device 1 can preferably further include an ID assigning unit 28. The ID assigning unit 28 is an exemplary configuration unit of an ID assigning unit that assigns an ID specific to an attribute to information related to a numerical value for design. The ID is a group symbol (also referred to as an attribute symbol) for displaying design information necessary for tolerance analysis in units of attributes and displaying them in a tolerance analysis table.

(3) The assembly design support apparatus 1 can preferably further include an address assigning unit 29. By providing the address assigning unit 29, the information writing instruction unit 26 can issue an instruction to write information related to the design numerical value in a location corresponding to the address. The address assigning unit 29 is an exemplary configuration unit of an address assigning unit that assigns an address to information related to a plurality of design numerical values. Even if an ID is not assigned to each attribute, it is also possible to display them collectively for each attribute by giving an address to each piece of information belonging to the attribute. If only information is written in the tolerance analysis table in attribute units, only the function of the ID assigning unit 28 described above is sufficient. In order to write information related to the numerical values for design collectively in a predetermined order, it is preferable to assign an address such as a number to each piece of information. For example, if an address indicating the order of 1 to 5 (A to E is acceptable) is assigned to a total of five pieces of information to which the ID “KS” is assigned, the five pieces of information to which the ID KS is assigned. They are not written in the tolerance analysis table in random order, but are written in the tolerance analysis table in a state of being arranged in the order of 1 to 5.

(4) Preferably, the assembly design support device 1 further includes a dimension tolerance presence / absence determining unit 30, a display tolerance priority unit 31, and a first standard tolerance reading unit 32. The dimensional tolerance presence / absence discriminating unit 30 is an exemplary component of a dimensional tolerance presence / absence discriminating unit that discriminates whether or not a dimensional tolerance is included in the design numerical value displayed by the first display unit 21. The display tolerance priority unit 31 is an exemplary component of display tolerance priority means that preferentially obtains a dimension tolerance when it is determined by the dimension tolerance presence / absence determination unit 30 that a dimension tolerance is included. The first standard tolerance reading unit 32 reads out a predetermined standard tolerance from the memory 11 and acquires it when the dimensional tolerance presence / absence discriminating unit 30 determines that the dimensional tolerance is not included. This is an example configuration part. The information input table display unit 24 (or the confirmation table display unit 25) displays the dimensional tolerance preferentially acquired by the display tolerance priority unit 31 or the standard tolerance acquired by the first standard tolerance reading unit 32 in the pre-analysis table.

(5) Preferably, the assembly design support apparatus 1 can further include a standard tolerance level selection receiving unit 33 and a second standard tolerance reading unit 34. In this case, the information input table display unit 24 (or the confirmation table display unit 25) is a means for displaying a predetermined standard tolerance (also referred to as a normal tolerance) as a plurality of options for each level, and the memory 11 includes: A means for storing a plurality of types of standard tolerances for each level. Level means the severity of tolerance. The standard tolerance level selection receiving unit 33 is an exemplary configuration unit of a standard tolerance level selection receiving unit that receives a selection from the above options. The second standard tolerance reading unit 34 is an exemplary configuration unit of a second standard tolerance reading unit that reads the standard tolerance of the level received by the standard tolerance level selection receiving unit 33 from the memory 11. Thereafter, the information input table display unit 24 (or the confirmation table display unit 25) can display the standard tolerance of a predetermined level read by the second standard tolerance reading unit 34.

(6) Preferably, the assembly design support device 1 can further include a hole / pin diameter dimensional difference calculator 35. In this case, the attribute includes a combination of the diameter of the hole in the assembly and the diameter of the pin inserted into the hole. The hole / pin diameter dimensional difference calculation unit 35 calculates the dimensional difference between the median of the hole diameter within the tolerance range and the median of the pin diameter within the tolerance range based on the hole diameter and the pin diameter. It is an example structural part of a hole and pin diameter size difference calculation means to do. As a result, the information input table display unit 24 (or confirmation table display unit 25) can display the dimensional difference on the information input table (or confirmation table). The tolerance analysis table display unit 27 may display the dimensional difference on the tolerance analysis table.

(7) The assembly design support device 1 may preferably further include a coefficient calculation formula creation unit 36. In this case, the attribute includes a lever ratio that is positioned as a sensitivity to dimensional tolerances. The coefficient calculation formula creation unit 36 is an exemplary configuration unit of a coefficient calculation formula creation unit that creates a coefficient calculation formula that allows a coefficient used for tolerance analysis to be set based on a lever ratio. As a result, the information input table display unit 24 (or confirmation table display unit 25) can display in the information input table (or confirmation table) selectable automatic coefficient setting using a coefficient calculation formula.

(8) Preferably, the assembly design support device 1 can further include a geometric tolerance half-value calculation unit 37. In this case, the attribute includes a geometric tolerance that is positioned as a range of allowable deviation from the ideal shape, posture, or position of the part. The geometric tolerance half-value calculation unit 37 is an exemplary configuration unit of a geometric tolerance half-value calculation unit that calculates the half value of the geometric tolerance displayed by the first display unit 21. Thereby, the information input table display unit 24 (or the confirmation table display unit 25) can display the half value of the geometric tolerance on the information input table (or the confirmation table) as plus and minus. The tolerance analysis table display unit 27 may display the half value of the geometric tolerance on the tolerance analysis table as plus and minus.

(9) The assembly design support device 1 can preferably further include a contribution rate setting / calculation unit 38 and a contribution rate dependent tolerance calculation unit 39. The contribution rate setting / calculating unit 38 is an exemplary configuration of a contribution rate setting / calculating unit that sets or calculates a contribution rate that quantifies the rate of contribution to the overall tolerance for each component tolerance that affects the overall tolerance of the assembly. Part. The contribution rate-dependent tolerance calculation unit 39 is an exemplary configuration unit of contribution rate-dependent tolerance calculation means for calculating the tolerance displayed in the tolerance analysis table depending on the contribution rate. As described above, the total tolerance can be considered to be the sum of each tolerance (Σ) or the square root of each tolerance added by the square (√). In order to cope with these two types of general tolerance concepts, it is preferable to prepare for Σ and √ for the contribution rate. In this case, the contribution rate dependent tolerance calculation unit 39 can perform calculations corresponding to Σ and √ respectively. Note that the contribution rate-dependent tolerance calculation unit 39 may be a component that performs calculation corresponding to only for Σ or only for √. Further, it is preferable that the contribution rate dependent tolerance calculation unit 39 calculates not only the contribution rate but also the lever ratio. However, the lever ratio may not be required depending on the configuration of the assembly. In such a case, the contribution rate dependent tolerance calculation unit 39 can calculate without using the lever ratio.

(10) The assembly design support device 1 can preferably further include a contribution rate selection receiving unit 40. The tolerance analysis table can display a contribution ratio selection key for calculating a tolerance to be allocated based on one of two or more contribution ratios. The contribution rate selection receiving unit 40 is an exemplary configuration unit of a contribution rate selection receiving unit that receives one of two or more contribution rate selection keys. The contribution rate dependent tolerance calculation unit 39 can perform calculation based on the selection from the contribution rate selection key.

(11) The assembly design support device 1 can preferably further include a calculation object exclusion instruction receiving unit 41 and a tolerance fixing unit 42. The calculation target exclusion instruction receiving unit 41 is an exemplary configuration unit of a calculation target exclusion instruction receiving unit that receives an instruction to exclude one or more of the tolerances from the processing target of the contribution rate dependent tolerance calculation unit 39. The tolerance fixing unit 42 is an exemplary configuration unit of a tolerance fixing unit that fixes the tolerance received by the calculation target exclusion instruction receiving unit 41. As a result, the contribution rate dependent tolerance calculation unit 39 can calculate a tolerance depending on the contribution rate for other tolerances excluding the tolerances fixed by the tolerance fixing unit 42.

(12) The assembly design support device 1 may preferably further include an information input / change receiving unit 43 and an information update display unit 69. The information input / change receiving unit 43 is an exemplary configuration unit of an information input / change receiving unit that receives input of information into the tolerance analysis table or change of already input information. The information update display unit 69 is an exemplary configuration unit of an information update display unit that displays information received by the information input / change receiving unit 43 instead of the original information. Information input or changed on the tolerance analysis table is transmitted from the tolerance analysis computer program 82 side to the tolerance setting computer program 81 side. As the information update display unit 69, the CPU 14 displays the information received by the information input / change receiving unit 43 instead of the original information. As a result, the result of the tolerance analysis can be visually confirmed together with the 2D or 3D image.

(13) The assembly design support device 1 may preferably further include a tolerance analysis selection receiving unit 44 and a design numerical value reading unit 45. In this case, the first display unit 21 can display a tolerance analysis selection key that can be selected for each tolerance analysis. The memory 11 stores design numerical values required for analysis for each tolerance analysis. The tolerance analysis selection receiving unit 44 is an exemplary component of a tolerance analysis selection key receiving unit that receives one selection of a tolerance analysis selection key. The design numerical value reading unit 45 is an exemplary configuration unit of design numerical value reading means for reading design values corresponding to the tolerance analysis received by the tolerance analysis selection receiving unit 44 from the memory 11. Thereafter, the first display unit 21 can display the design numerical value read by the design numerical value reading unit 45.

(14) Preferably, the assembly design support device 1 can further include an analysis result list display unit 46. The analysis result list display unit 46 is an exemplary component of an analysis result comparison display unit that compares and displays each analysis result for each tolerance analysis. This allows you to compare and display the results of multiple tolerance analyses. For tolerances that were not problematic for individual analyses, if there are problems when considering other analyses, use this list. While looking at the results, further tolerances can be examined.

(15) The assembly design support device 1 may preferably further include an attribute display form change receiving unit 47 and a display form changing unit 48. In this case, the 1st display part 21 can display the attribute display form change key which can change a display form for every attribute. For each attribute, the memory 11 stores a display form of design numerical values related to the attribute in association with each other. The attribute display form change accepting unit 47 is an exemplary configuration part of an attribute display form change key accepting unit that accepts one selection of an attribute display form change key. The display form changing unit 48 accesses the information in the memory 11 to display the design numerical value display form related to the attribute received by the attribute display form change receiving unit 47 and display the design numerical value related to other attributes. It is an example structural part of the display form change means changed from a form. Thereby, the first display unit 21 can display the design numerical values changed by the display form changing unit 48.

(16) The assembly design support device 1 can preferably further include an in-table information designation receiving unit 49 and a design numerical value display form changing unit 50. The in-table information designation receiving unit 49 is an exemplary configuration unit of an in-table information designation receiving unit that receives designation of information in a tolerance analysis table, an information input table, or a confirmation table. The design numerical value display form changing unit 50 is information that matches the information received by the in-table information designation receiving unit 49, and the design numerical value displayed by the first display unit 21 is changed to other design numerical values. It is an example structural part of the numerical value display form change means for a design displayed changing. As a result, for example, when the user designates information in the tolerance analysis table, information input table or confirmation table with a ponting device or the like, the CPU 14 preferably displays a 2D or 3D image of the assembly as the first display unit 21. Among the many design numerical values displayed together, only the design numerical value corresponding to the instructed information can be displayed differently from other design numerical values (for example, highlighted display).

(17) The assembly design support device 1 can preferably further include a one-side tolerance presence / absence determining unit 51 and a one-side tolerance calculating unit 52. The one-side tolerance presence / absence discriminating unit 51 is an exemplary configuration of one-side tolerance presence / absence discriminating means for discriminating whether or not the design numerical value includes one-side tolerance. The one-side tolerance calculation unit 52 is an exemplary configuration unit of one-side tolerance calculation means for obtaining a half value of the one-side tolerance when the one-side tolerance is included. As a result, the information input table display unit 24 (or the confirmation table display unit 25) can display the half value of the one-sided tolerance as plus or minus as the tolerance in the information input table (or confirmation table). Note that the tolerance analysis table display unit 27 may display the half value of the one-sided tolerance on the tolerance analysis table as plus and minus.

  As long as each structural requirement of said (1)-(17) includes at least each structural requirement of (1), 1 or 2 or more of each structural requirement of (2)-(17) is arbitrarily combined. However, the case where combination is impossible is excluded. FIG. 1 shows an assembly design support apparatus 1 that includes all of the components (1) to (17). In addition, in the functional components 21 to 75 of the CPU 14 of the assembly design support apparatus 1, components that do not exist in the structural requirements (1) to (17) are more preferable with reference to FIG. This will be described specifically as a configuration constituting the embodiment.

<2.1 Attribute unit display function>
FIG. 2 shows a flow of main processing performed using the assembly design support apparatus of FIG. 3 to 12 show a screen or a part of the screen displayed in accordance with each process of FIG. Hereinafter, each process of FIG. 2 will be described with reference to FIGS.

  A suitable process using the assembly design support apparatus 1 can be performed, for example, in steps S101 to S121 shown in FIG.

(1) Step S101 (CAD file receiving step)
In this step, the CPU 14 receives a CAD file. The CAD file includes CAD data of the assembly and is stored in the memory 11. In this step, the CPU 14 reads and receives a CAD file from the memory 11 as the CAD file receiving unit 53 (an example of a CAD file receiving unit).

(2) Step S102 (first display step)
This step is performed subsequent to step S101. In this step, the CPU 14 reads the tolerance setting computer program 81 from the memory 11 as the first display unit 21 and displays a screen including design numerical values and attribute keys. This screen preferably displays a 2D or 3D image of the assembly and a feature creation menu including various menus including attribute keys. Next, this step will be described with reference to FIG.

  The file 150 shown in FIG. 3 preferably includes an image A of the assembly 180, an attribute key area B in which a plurality of attribute keys are collected, and attribute display keys for selecting and highlighting each attribute. An attribute display key area C and an analysis selection key area D that can display an analysis selection key for reading out information necessary for each tolerance analysis in a window format are displayed. In FIG. 3, the image A, attribute key area B, attribute display key area C, and analysis selection key area D are shown enlarged outside the file 150. The file 150 has a display screen 151 that can display the image A. The attribute key area B includes, as selectable attributes, an attribute key 152 called “dimension on the calculation formula”, an attribute key 153 called “hole / pin (back)”, an attribute key 154 called “geometric tolerance”, and “ It includes an attribute key 155 called “lever ratio”. “Geometric tolerance” may be changed to “geometric tolerance and tolerance value not included in calculation formula”. The attribute key area B includes an export instruction key 156 capable of exporting information prepared by using the tolerance setting computer software 81 to the tolerance analysis computer program 82, and a tolerance setting computer from the tolerance analysis computer program 82. And an import instruction key 157 capable of importing information such as a tolerance analysis result toward the program 81. The attribute display key area C includes an attribute display key 162 referred to as “display of dimensions on the calculation formula”, an attribute display key 163 referred to as “display of holes / pins”, and an attribute display referred to as “display of geometric tolerance”. Key 164 and an attribute display key 165 referred to as “display lever ratio”. The attribute display keys 162, 163, 164, and 165 are collectively referred to as “attribute display form change key 162 and the like”. The analysis selection key area D includes an analysis selection key (an example of a tolerance analysis selection key) 170 called “analysis 1” and a window area 171 (an example of a tolerance analysis selection key) that displays a list of analyzes 2 to 4 in a selectable manner. . The analysis selection key 170 and the window area 171 are collectively referred to as “tolerance analysis selection key 170 etc.”.

  In this embodiment, the assembly 180 mainly includes, for example, a part 181, a part 182, a part 183, a part 184, a part 185, a part 186, a part 187, and a part 188. Yes. The component 182 is a gear, and is attached to the component 181 in a state where a pin 182b is inserted into a hole 182a provided substantially at the center thereof. The part 183 is a gear that meshes with the part 182 and has a smaller diameter than the part 182. The component 183 is attached to the component 181 in a state where a pin 183b is inserted into a hole 183a provided at substantially the center thereof. The component 184 is a gear that meshes with the component 183 so as to be orthogonal to the component 183 from above. The component 185 is elongated in one direction, and is attached to the component 181 with a pin 185b inserted into a hole 185a provided on one end side. The part 185 is in contact with the upper part of the part 184 at a position close to the end opposite to the one end provided with the hole 185a. The component 186 is elongated in one direction, and is attached to the component 181 in a state where a pin 186b is inserted into a hole 186a provided on one end side. The component 186 has an end opposite to one end where the hole 186 a is provided in contact with the upper surface of the end opposite to the component 185. The parts 182 to 186 described above are attached to the surface of the part 181 on the front side of the drawing. On the other hand, the component 187 is a shaft that is long in one direction, and is attached by being inserted into a predetermined position in the thickness direction of the surface of the component 181. One end of the component 187 in the axial direction is fixed at a lower position beyond the position of the component 185. The end of the component 187 opposite to the one end protrudes outward from the component 181. The part 188 is a handle, and its substantially central portion is fixed to the opposite end of the part 187. In FIG. 3, various dimensions and geometrical tolerances (an example of design numerical values) of the components 181 to 188 of the assembly 180 are displayed together with an image A of the assembly 180. The various dimensions and geometrical tolerances are displayed on the display screen 151 so that the user can select them using the input unit 10.

(3) Step S103 (design numerical value selection discrimination step)
This step is a step of determining whether or not various design numerical values have been selected through the input unit 10 from the user. The CPU 14 selects one or more of various design numerical values (including dimensions and geometrical tolerances) displayed together with the image A as the design numerical value selection determination unit 54 (an example of a design numerical value selection determination unit). It is determined whether or not. If the result of determination in step S103 is YES, the CPU 14 executes step S104. On the other hand, if the result of determination in step S103 is NO, the CPU 14 skips step S104 and executes step S105.

(4) Step S104 (design numerical value selection acceptance step)
This step is a step of accepting selection of a numerical value for design displayed together with the image A. The CPU 14 executes step S104 as the design numerical value selection receiving unit 22.

  The five types of design numerical values surrounded by a thick dotted line displayed near the assembly 180 shown in FIG. 4 are dimensions received by the design numerical value selection receiving unit 22. In the present embodiment, the five types of numerical values for design are positioned in an attribute called a dimension that rides on the calculation formula.

(5) Step S105 (confirmation table display instruction determination step)
This step is a step of determining whether or not there is an instruction from the user via the input unit 10 for the export instruction key 156. The CPU 14 executes step S105 as a confirmation table display instruction determination unit 55 (an example of a confirmation table display instruction determination unit). If the result of determination in step S105 is YES, the CPU 14 executes step S106. On the other hand, if the result of determination in step S105 is NO, the CPU 14 executes step S107.

(6) Step S106 (all attribute setting determination step)
This step is a step of determining whether or not all the attributes necessary for the analysis have been set. The CPU 14 executes step S106 as the all attribute setting determination unit 56 (an example of all attribute setting determination means). If the result of determination in step S106 is YES, the CPU 14 executes step S113. On the other hand, if the result of determination in step S106 is NO, the CPU 14 returns to step S103.

(7) Step S107 (attribute selection discrimination step)
This step is a step of determining whether or not one of the attribute keys 152 to 155 has been selected through the input unit 10 from the user. The CPU 14 executes step S107 as the attribute selection determination unit 57 (an example of attribute selection determination means). If the result of determination in step S107 is YES, the CPU 14 executes step S108. On the other hand, if the result of determination in step S107 is NO, the CPU 14 returns to step S103.

(8) Step S108 (attribute key selection acceptance step)
This step is a step executed by the CPU 14 as the attribute key selection receiving unit 23 when the user gives an instruction to select one of the attribute keys 152 to 155. The user selects five types of design numerical values (dimensions enclosed by a thick dotted line) in FIG. 4 from the input unit 10 and selects and designates the attribute key 152 (see the thick black arrow in FIG. 4). As a result, the CPU 14 accepts selection of an attribute corresponding to the attribute key 152 (“dimension on the calculation formula”).

(9) Step S109 (an example of a second display step as an information input table display step)
This step is a step performed subsequent to step S108. As the information input table display unit 24, the CPU 14 displays information related to the design numerical values received in step S <b> 104 (including design numerical values in this embodiment) before the tolerance analysis. To display. An information input table 190 shown in FIG. 4 is an example of the pre-analysis table together with a confirmation table described later. The information input table 190 displays tolerance analysis data including the five selected design numerical values. Specifically, in the information input table 190, the dimensions for the five types of calculation formulas are displayed line by line, and the current dimension name 191, the new dimension name 192, the item 193, the dimension 194, and the tolerance 195 are in one column. It is displayed one by one. In this embodiment, the item 193 is an entry field that can be input or changed by the user. Here, a standard tolerance (also called a normal tolerance) is displayed by default in the tolerance 195 column. However, as described later, when a specific tolerance is included in the dimension displayed together with the image A, the specific tolerance may be displayed in the tolerance 195 field. Further, the information input table 190 can also display a standard tolerance selection area 198 in which standard tolerances can be selected for each level. When the user selects one level from the standard tolerance selection area 198, one of a plurality of standard tolerances can be automatically input to the tolerance 195. This will be described in detail later. The information input table 190 includes a setting key 196 for setting the displayed information and a cancel key 197 for canceling the displayed information.

(10) Step S110 (input discrimination step)
This step is a step of determining whether information has been input or changed in the information input table 190. For example, in this step, it is determined whether or not there is an input to the item 193, a change of the new dimension name 192, a change of the tolerance 195, or deletion of at least a part of the information. As a result of executing step S110 as an input determination unit 58 (an example of an input determination unit), the CPU 14 executes step S111 if YES. On the other hand, if the result of determination in step S110 is NO, the CPU 14 continues to execute determination in step S110.

(11) Step S111 (input reception / display step)
This step is a step of accepting and displaying input, change, deletion, etc. to the information input table 190. The CPU 14 executes step S111 as the input reception / display unit 59 (an example of input reception / display means). As a result, the information input table 190 of FIG. 4 displays five inputs such as “KYORI 2” in the item 193.

(12) Step S112 (Setting Key Input Discrimination Step)
This step is a step of determining whether or not the setting key 196 is instructed in the information input table 190 (see the thick black arrow in FIG. 4). The CPU 14 executes step S112 as the setting key input determination unit 60 (an example of a setting key input determination unit). If the result of this determination is YES, the CPU 14 returns to step S103 and executes that processing. On the other hand, if the result of determination in step S112 is NO, the CPU 14 continues to execute determination in step S112.

  An image A of the assembly 180 illustrated in FIG. 5 includes information input to the item 193 in the information input table 190. When the user instructs the setting key 196 of the information input table 190 in FIG. 4, the CPU 14 displays the image A including the information input in the item 193. The CPU 14 returns to step S103 to determine the selection of the design numerical value from the user. In the image A in FIG. 5, when the user selects six types of design numerical values (numerical values surrounded by a thick dotted line in FIG. 5) related to the attribute (hole / pin (back)), the CPU 14 proceeds to step S104. Process. When the user selects an attribute key 153 called “hole / pin (back)”, the CPU 14 executes step S108 and step S109 to display the information input table 200 of FIG.

  The information input table 200 is an example of a pre-analysis table together with a confirmation table described later. The information input table 200 displays tolerance analysis data including the six selected design numerical values. Specifically, the information input table 200 displays a total of six types of dimensions of three types of hole diameters and three types of pin diameters, one line at a time, and a current dimension name 201, a new dimension name 202, Items 203, dimensions 204, and tolerances 205 are displayed one column at a time. In this embodiment, the item 203 is an entry field that can be input or changed by the user. The information input table 200 has another standard tolerance selection area 198 a different from the standard tolerance selection area 198 of the information input table 190. The standard tolerance selection area 198a is an area for selecting hole and pin tolerances from the hole and pin fitting tolerance table. The hole tolerance area class selection window and the axis (= pin) tolerance area class And a selection window. Here, what is prescribed in JIS B0401 can be used as the fit tolerance range. The tolerance 205 column, the setting key 206 and the cancel key 207 are the same as the tolerance 195 column, the standard tolerance selection area 198, the setting key 196 and the cancel key 197 of the information input table 190 described above. Here, a duplicate description is omitted.

  An image A of the assembly 180 illustrated in FIG. 6 includes information input to the item 203 in the information input table 200. When the user instructs the setting key 206 of the information input table 200 in FIG. 5, the CPU 14 displays the image A including the information input in the item 203. The CPU 14 returns to step S103 to determine the selection of the design numerical value from the user. In the image A in FIG. 6, when the user selects three types of design numerical values (numerical values surrounded by a thick dotted line in FIG. 6) related to the attribute (geometric tolerance), the CPU 14 performs the process of step S <b> 104. When the user selects an attribute key 154 called “geometric tolerance”, the CPU 14 executes step S108 and step S109 to display the information input table 210 of FIG.

  The information input table 210 is an example of a pre-analysis table together with a confirmation table described later. In the information input table 210, tolerance analysis data including the three selected design numerical values is displayed. Specifically, the information input table 210 displays three types of geometric tolerance information line by line, and the current dimension name 211, the new dimension name 212, the item 213, the dimension 214, and the tolerance 215 one column at a time. It is displayed. In this embodiment, the item 213 is an entry field that can be input or changed by the user. The tolerance 215 column, the standard tolerance selection area 198, the setting key 216, and the cancel key 217 are the tolerance 195 column, the standard tolerance selection area 198, the setting key 196, and the cancel key 197 described above. Therefore, a duplicate description is omitted here.

  An image A of the assembly 180 illustrated in FIG. 7 includes information input to the item 213 in the information input table 210. When the user instructs the setting key 216 of the information input table 210 in FIG. 6, the CPU 14 displays the image A including the information input in the item 213. The CPU 14 returns to step S103 to determine the selection of the design numerical value from the user. In the image A in FIG. 7, when the user selects three types of design numerical values (numerical values surrounded by a thick dotted line in FIG. 7) related to the attribute (lever ratio), the CPU 14 performs the process of step S <b> 104. When the user selects an attribute key 155 called “lever ratio”, the CPU 14 executes step S108 and step S109 to display the information input table 220 of FIG.

  The information input table 220 is an example of a pre-analysis table together with a confirmation table described later. The information input table 220 displays tolerance analysis data including the three selected design numerical values. Specifically, in the information input table 220, information related to three types of lever ratios is displayed line by line, and the current dimension name 221, the new dimension name 222, the item 223, the dimension 224, and the tolerance 225 are one. Each column is displayed. In this embodiment, the item 223 is an entry field that can be input or changed by the user. The tolerance 225 column, the standard tolerance selection area 198, the setting key 226, and the cancel key 227 are the tolerance 195 column, the standard tolerance selection area 198, the setting key 196, and the cancel key 197 of the information input table 190 described above. Therefore, a duplicate description is omitted here.

  FIG. 8 shows an example of the assembly 180 displayed on the display screen 151 and various dimensions associated therewith after the setting key 226 shown in FIG. 7 is instructed. As shown in FIG. 8, the assembly 180 displays items of dimensions related to four types of attributes. These items are preferably displayed in different colors for each attribute.

  An image A shown in FIG. 9 is a three-dimensional display of the assembly 180. The user changes the two-dimensional image A displayed on the display screen 151 in FIG. 3 to the three-dimensional image A by rotating the assembly 180 or designating a key in the file 150 through the input unit 10. can do. Further, when the user instructs the export instruction key 156 (see the thick arrow in FIG. 9), the confirmation table is displayed when YES is determined in the step S106. The display of the confirmation table will be described in step S113.

(13) Step S113 (an example of a confirmation table display step, second display step)
This step is a step executed when YES in step S106. The CPU 14 performs tolerance analysis on information (including design numerical values) related to design numerical values in the information input tables 190, 200, 210, and 220 (referred to as “information input table 190 etc.”) as the confirmation table display unit 25. Display in the confirmation table displayed before. The information input table 190 and the like shown in FIGS.

  FIG. 10 shows an example of the confirmation table 230. In this embodiment, the confirmation table 230 is in a book format including a page 240 referred to as “dimension on calculation formula”, a page 260 referred to as “hole / pin (backlash)”, and a page 280 referred to as “geometric tolerance”. It is a table. However, the number of pages and the types of attributes are not limited to the above. The page 240 displays information previously input (or changed) as dimensions to be put on the calculation formula so that it can be rewritten. Specifically, on the page 240, dimensions 251, 252, 253, 254, and 255 that ride on five types of calculation formulas are displayed line by line, and the order 241, the item 242, the direction 243, the coefficient 244, the dimension 245, and Tolerances 246 are displayed one column at a time. In the tolerance 246 column, plus and minus tolerances 251 a and 251 b are further displayed for the dimension 251. Also for the dimension 252, the tolerances 252a and 252b on the plus side and the minus side are displayed. The dimensions 253, 254, and 255 that are used in the calculation formula are not labeled in FIG. 10, but similarly, the tolerances on the plus side and the minus side are displayed. The confirmation table 230 is common to the pages 240, 260, and 280, and is a key (finally called “export”) 257 for final export to the standard tolerance selection area 198 and the tolerance analysis computer program 82. And a key 258 for canceling processing without performing the export (key called “cancel”). The standard tolerance selection area 198 is an area that can be selected when it is desired to change the tolerance in the confirmation table 230 to a standard tolerance of a desired level. On page 240, selecting one (eg, intermediate) from the four levels in standard tolerance selection area 198 will change the tolerance in tolerance 246 to an intermediate standard tolerance.

  An item 242 in the page 240 is a portion where information input or changed in the item 193 of the information input table 190 is displayed so that it can be rewritten. The item 242 is composed of five lines because there are five types of dimensions for the calculation formula. What is important here is that a common ID is preferably assigned to the dimensions of the five types of calculation formulas, and more preferably, numbers, alphabets or the like from the top to the bottom of the five lines. Other than these, addresses that are distinguishable from each other are allocated. This process will be described in detail later.

  The page 260 displays information previously input (or changed) as holes / pins (backlash) so that it can be rewritten. Specifically, on the page 260, information 271 and 276 regarding two sets of holes / pins (backlash) are displayed separately in the vertical direction. Information about the remaining set of holes / pins (backlash) is hidden below the page 260. By moving the bar in page 260 downward, the remaining set of information can also be displayed. In the area of the information 271 regarding the hole / pin (back), the hole 272, the pin 273, and the backlash 274 are displayed line by line. In the hole 272 and the pin 273, an item 261, a coefficient 263, a dimension 264, and a tolerance 265 are displayed one by one. A row of central tolerances 266 is displayed immediately below the row of holes 272 and the row of pins 273, respectively. Each central tolerance 266 displays a median value within the tolerance range and a tolerance (indicated by ±) having the same width on the plus side and the minus side from the median value. The display of the central tolerance 266 is based on the function of changing the display of the one-side tolerance described later. In addition, in the play 274, different names different from the items 261 in the hole 272 and the pin 273, such as the play name, direction 1, direction 2, coefficient, and center value, are displayed one by one. In the tolerance 265 column, each tolerance width on the plus side and the minus side with respect to the dimension 264 is further displayed. This display is not necessarily ± display, and may be zero and plus, zero and minus, plus or minus. Further, the hole 277, the pin 278, and the backlash 279 are displayed for each line in the area of the information 276 regarding the hole / pin (backlash). Each column display of items, coefficients, dimensions and tolerances, each column display in the backlash field, and each tolerance display on the plus side and the minus side in the tolerance column are displayed in the above-mentioned information 271 on the hole / pin (backlash). The same as the area. For this reason, reference to the detailed configuration in the area of the information 276 regarding the hole / pin (back) is omitted.

  In the holes 272 and 277 in the page 260 and the items 261 in the pins 273 and 278, information input or changed in the item 203 of the information input table 200 is displayed so that it can be rewritten. Although not displayed in FIG. 10, the page 260 may have an area similar to the standard tolerance selection area 198a displayed in the information input table 200. When the bar on the right side of page 260 is moved downward, a standard tolerance selection area 198a appears. When a tolerance range class relating to various fits in the standard tolerance selection area 198a is selected on the page 260, the tolerance within the tolerance 265 is changed to the tolerance of the corresponding class. In addition, as with the dimensions for the calculation formula described above, the CPU 14 preferably assigns a common ID to the information of the six types of holes and pins as the ID assigning unit 28. More preferably, the CPU 14 assigns numbers, alphabets, or other distinguishable addresses from the top to the bottom of the item 261 for each of the six types of information as the address assigning unit 29.

  The page 280 displays information previously input (or changed) as a geometric tolerance so that it can be rewritten. Specifically, on the page 280, three types of geometric tolerances 291, 292, and 293 are displayed line by line, and an item 281, a coefficient 283, a dimension 284, and a tolerance 285 are displayed line by line. The tolerance 285 column further displays the plus and minus tolerances for each of the dimensions 291, 292, and 293.

  In the item 281 in the page 280, information input or changed in the item 213 of the information input table 210 is displayed so that it can be rewritten. The item 281 includes three lines because there are three types of geometrical tolerances. Page 280, like page 240, has a standard tolerance selection area 198. On page 280, if one (eg, intermediate) is selected from the four levels in standard tolerance selection area 198, the tolerance within tolerance 285 is changed to an intermediate standard tolerance. In addition, as with the dimensions for the calculation formula described above, the CPU 14 preferably assigns a common ID to the three types of geometric tolerance information as the ID assigning unit 28. More preferably, the CPU 14 assigns numbers, alphabets, or other distinguishable addresses from the top to the bottom of the item 281 for each of the three types of information as the address assigning unit 29.

  The coefficient 244 of the page 240 and the coefficient 263 of the page 260 are indicated by a bar “-” in FIG. The user can instruct bar display and select manual setting or automatic setting of the coefficient. When the automatic setting is selected, as will be described later, a coefficient based on a calculation formula using the lever ratio can be obtained. On the other hand, when manual setting is selected, a coefficient desired by the user can be freely input to set the coefficient. This mechanism will be described later.

(14) Step S114 (ID assignment step)
Step S114 is a step of assigning an ID specific to the attribute to information related to the numerical value for design. CPU14 performs step S114 as ID provision part 28. FIG. For example, taking the page 240 of FIG. 10 as an example, the ID assigning unit 28 assigns a common ID of “KS” to dimensions that are put on five types of calculation formulas. Taking the page 260 as an example, the ID assigning unit 28 assigns a common ID “AP” to the information on the six types of holes and pins. Furthermore, taking the page 280 as an example, the ID assigning unit 28 assigns a common ID “KI” to the three types of geometric tolerance information. Note that step S114 is processing after step S113 in FIG. 2, but may be processing before step S113 or simultaneous processing.

(15) Step S115 (address assignment step)
Step S115 is a step of assigning addresses to information related to a plurality of design numerical values. More preferably, the information related to the plurality of design numerical values is information belonging to the same ID assigned by the ID assigning unit 28. The CPU 14 executes step S115 as the address assignment unit 29. For example, taking the page 240 of FIG. 10 as an example, the CPU 14 uses the address assignment unit 29 as A, B, C, D, E in order from the top to the bottom with respect to the dimensions on the five types of calculation formulas. Give an address. Taking the page 260 as an example, since the CPU 14 has already been assigned up to the address E and it is desirable to open F as the address assigning unit 29, G, Addresses H, I, J, K, and L are assigned. Subsequently, taking the page 280 as an example, since the CPU 14 has already been assigned up to the address L and it is desirable to free M as the address assigning unit 29, N, for the three types of geometric tolerance information, Addresses O and P are given. However, F and M are not excluded, and addresses may be given successively in alphabetical order. Further, although step S115 is processing after step S114 in FIG. 2, it may be processing before step S114 or simultaneous processing. That is, when both ID assignment and address assignment are performed, either of them may be performed first. Further, the assignment of the ID and the address may be performed before or simultaneously with the display of the confirmation table 230 (step S113).

(16) Step S116 (additional change determination step)
This step is a step of determining whether or not the information displayed in the confirmation table 230 has been added or changed. The CPU 14 executes step S116 as an additional change determination unit 61 (an example of an additional change determination unit). If the result of this determination is YES, the CPU 14 executes step S117. On the other hand, when the determination result of step S116 is NO, the CPU 14 skips step S117 and executes step S118.

(17) Step S117 (addition / change information reception / display step)
This step is a step of updating the original information to new information when the information in the confirmation table 230 is added or changed. The CPU 14 executes step S117 as the additional change information reception / display unit 62 (an example of the additional change information reception / display unit). Note that step S117 may be divided into an information reception step and an information display step. In that case, CPU14 may perform an information reception step as an additional change information reception part, and may perform an information display step as an additional change information display part after that.

(18) Step S118 (Tolerance analysis table display instruction determination step)
This step is a step of determining in the confirmation table 230 whether or not there is an instruction from the user for the key 257 (see FIG. 10). The CPU 14 executes step S118 as the tolerance analysis table display instruction determination unit 63 (an example of a tolerance analysis table display instruction determination unit). If the result of this determination is YES, the CPU 14 executes step S119. On the other hand, if the result of this determination is NO, the process of the CPU 14 returns to step S116.

(19) Step S119 (ID / address confirmation step)
In this step, when the key 257 (see FIG. 10) is instructed by the user, the CPU 14 uses the ID assigned by the ID assigning unit 28 as the ID / address confirming unit 64 (an example of ID / address confirming means). And / or a step of confirming the address assigned by the address assigning unit 29.

(20) Step S120 (information writing instruction step)
This step is a step in which the CPU 14 instructs the information writing instruction unit 26 to write the information in the confirmation table 230 at a position grouped for each attribute on the tolerance analysis table. The CPU 14 executes this step in conjunction with the tolerance setting computer program 81 and the tolerance analysis computer program 82. Until step S120, the CPU 14 has read only the tolerance setting program 81 and performs each process, but from step S120, the CPU 14 also reads the tolerance analysis computer program 82.

(21) Step S121 (third display step)
In this step, according to the information writing instruction unit 26, information related to the numerical value for design (tolerance analysis data) is assigned to the tolerance analysis table in advance for each attribute specified in the tolerance analysis table for analyzing the tolerance. This is a step to display at the location. The CPU 14 reads out the tolerance analysis computer program 82 from the memory 11 as the tolerance analysis table display unit 27, and may also include information on the confirmation table 230 (further, information after calculation using the information is included). ) For each attribute.

  11 and 12 show an example of the tolerance analysis table 300. FIG. In this embodiment, the tolerance analysis table 300 is preferably a first tolerance analysis table 300a shown in FIG. 11, a second tolerance analysis table 300b, a third tolerance analysis table 300c, and a fourth tolerance analysis table 300d shown in FIG. Including. The information group 301 of A to E in the “number” column of the first tolerance analysis table 300a is information related to the numerical value for design belonging to the attribute “dimension on the calculation formula”. The G to L information group 302 in the same column of the first tolerance analysis table 300a is information related to the numerical values for design belonging to the attribute “hole / pin (back)”. The N to P information group 303 in the same column of the first tolerance analysis table 300a is information related to design numerical values belonging to the attribute "geometric tolerance". The information group 304 of the second tolerance analysis table 300b is a part of information related to the numerical value for design belonging to the attribute “hole / pin (back)”. The information groups 301, 302, 303, and 304 may be information of each attribute of the confirmation table 230, but more preferably include new information calculated from the information of each attribute. For example, in addition to the information in the confirmation table 230, the information groups 301, 302, and 303 include new information such as a tolerance calculation result (for Σ and √) and a contribution rate (for Σ and √).

  The third tolerance analysis table 300c is a table that displays calculation results in the tolerance analysis, and includes an evaluation result 305. The fourth tolerance analysis table 300d is a part that displays a design target value (also simply referred to as a target value) of the overall tolerance. In this embodiment, the target value of total tolerance: ± 0.2 is displayed. The user inputs the target value, and performs tolerance analysis so that some or all of the evaluation results become “O” while resetting the tolerances of various parts of the assembly to satisfy this value. Can do. Note that a key 310 called “analysis result list”, a key 311 called “Σ allocation”, and a key 312 called “√ allocation” are displayed above the first tolerance analysis table 300a of FIG. ing. These keys 310, 311 and 312 will be described in detail later. In the first tolerance analysis table 300a, when the number of information written from the confirmation table 230 exceeds a predetermined number, the table load with the number of rows automatically increased may be changed. In such a table changing function, the CPU 14 executes a step of determining whether or not the number of information is equal to or larger than a predetermined number, and when it is determined that the number of information is equal to or larger than the predetermined number, reads a table having a large number of rows from the memory 11. It is demonstrated by displaying. For example, in this embodiment, when the number of information exceeds 25, the CPU 14 changes the first tolerance analysis table 300a that can write up to 25 information numbers to the first tolerance analysis table 300a that can write up to 50 information numbers. You can switch to

  In the flowchart of FIG. 2, step S114, step S115, and step S119 are not necessarily required. That is, ID assignment, address assignment, and confirmation thereof are suitable processes for collecting information related to design numerical values for each attribute and writing them in the tolerance analysis table 300, but are not essential processes. Through step S120 (information writing instruction step), the numerical value related information for design belonging to a specific attribute can be displayed in a unit of the attribute.

  Further, by assigning the same address as the individual address previously assigned to the tolerance analysis table 300 to the information related to the numerical value for design belonging to a specific attribute, writing in attribute units is possible. . In this method, it is not always necessary to assign an attribute-specific ID. For example, individual addresses are assigned to the rows of the tolerance analysis table 300 in the order of A to Z. The CPU 14 assigns addresses in alphabetical order from A to E to the information (five types) related to the numerical value for design belonging to the attribute called “dimension on the calculation formula” as the address assigning unit 29. Next, as the information writing instruction unit 26, the CPU 14 assigns information related to five types of design numerical values to which addresses A to E are assigned, and individual addresses to A to E in the tolerance analysis table 300. Write to the location. The CPU 14 displays, as the tolerance analysis table display unit 27, information related to the five types of design numerical values at the position of the individual address in the tolerance analysis table 300 based on the instruction. With such processing, it is not always necessary to assign an ID.

<2.2 Tolerance priority display function>
FIG. 13 shows a processing flow (13A) of a tolerance priority display function that can be performed using the assembly design support apparatus of FIG. 1 and a diagram (13B) for explaining the function.

  The flow (13A) can be incorporated in addition to a part of the flow of FIG. Specifically, each processing flow from step S201 to step S203 of (13A) can be incorporated between the attribute key selection reception step (S108) to the information input table display step (S109) in FIG.

(22) Step S201 (Dimension tolerance presence determination step)
This step is a step of determining whether or not the numerical value tolerance for design is displayed on the display screen 151, preferably in association with the image of the assembly 180. Prior to the display of the information input table 190 or the like, the CPU 14 executes step S201 as the dimension tolerance presence / absence determining unit 30.

(23) Step S202 (Display tolerance priority step)
This step is a step of giving priority to the displayed tolerance when the tolerance is displayed as a result of the determination in step S201 (in the case of YES). The CPU 14 executes step S202 as the display tolerance priority unit 31.

(24) Step S203 (First Standard Tolerance Reading Step)
This step is a step of reading and obtaining the standard tolerance from the memory 11 when the tolerance is not displayed (in the case of NO) as a result of the determination in step S201. The CPU 14 executes step S203 as the first standard tolerance reading unit 32 (an example of first standard tolerance reading means).

  After step S202 or step S203, the CPU 14 displays the displayed tolerance or standard tolerance on the information input table 190 or the like as the information input table display unit 24. For example, when using the information input table 190, as shown in (13B), when the tolerance F (tolerance enclosed by a thick dotted ellipse in 13B) is displayed together with the image of the assembly 180. The tolerance F is preferentially displayed in the tolerance 195 column of the information input table 190. On the other hand, when the tolerance is not displayed together with the image, the standard tolerance E is read from the memory 11 and displayed in the tolerance 195 column.

<2.3 Display function by standard tolerance level>
FIG. 14 shows a processing flow (14A) of a display function classified by standard tolerance levels and a diagram (14B) explaining selection from standard tolerances classified by level, which can be performed using the assembly design support apparatus of FIG. . FIG. 15 is a diagram for explaining the standard tolerance of each level stored in the memory.

  The flow of (14A) can be incorporated in addition to a part of the flow of FIG. Specifically, each processing flow from step S301 to step S303 in (14A) can be incorporated between the information input table display step (S109) to the input reception / display step (S111) in FIG.

(25) Step S301 (standard tolerance level selection determination step)
This step includes four types of “Precision”, “Intermediate”, “Coarse”, and “Very coarse” displayed in the standard tolerance selection area 198 displayed in the information input table 190 and the like. In this step, it is determined whether one of the options 351, 352, 353, and 354 has been selected. The CPU 14 executes step S301 as the standard tolerance level selection determination unit 65 (an example of a standard tolerance level selection determination unit). If the result of determination in step S301 is that there is no selection of one of the above options, the CPU 14 executes step S111. On the other hand, if the result of determination in step S301 is that one of the above options has been selected, the CPU 14 executes step S302. (14B) shows a situation in which the user instructs to select the option 353 from the standard tolerance selection area 198 in the information input table 190 (see thick arrows). In the case of the information input table 200, it is determined whether or not each “tolerance zone class” of the hole and the shaft corresponding to the standard tolerance level has been selected from the standard tolerance level selection area 198a.

(26) Step S302 (standard tolerance level selection acceptance step)
This step is a step of accepting selection when one of the four choices 351, 352, 353, and 354 displayed in the standard tolerance selection area 198 is selectable. For the standard tolerance level selection area 198a, step S302 is a step of accepting selection of a tolerance zone class. The CPU 14 accepts the selection as the standard tolerance level selection accepting unit 33. Specifically, when one of the four options 351, 352, 353, and 354 is selected or instructed by the user, or one of various tolerance zone classes is selected, the CPU 14 accepts the selection. Can be executed. However, the selection may be accepted in accordance with an instruction from the setting key 196.

(27) Step S303 (Second Standard Tolerance Reading Step)
This step is a step of reading out and obtaining the standard tolerance of the selected level from the memory 11. The CPU 14 executes step S303 as the second standard tolerance reading unit 34 (an example of second standard tolerance reading means). As shown in FIG. 15 (15A), the memory 11 stores a table 360 in which a tolerance for each level according to a range of dimensions is set. The CPU 14 reads, as the second standard tolerance reading unit 34, the standard tolerance corresponding to the level selected by the user (here, “rough grade” is illustrated) from the memory 11. Thereafter, the information input table display unit 24 displays the standard tolerance of the coarse grade (tolerance in the frame G1) in the tolerance 195 column of the information input table 190. Further, the memory 11 stores tables 361 and 362 in which tolerance ranges are set in accordance with the sizes of the diameters of the hole and the shaft. The CPU 14 reads, as the second standard tolerance reading unit 34, the tolerance corresponding to the tolerance range class of the level selected by the user from the memory 11. Thereafter, the information input table display unit 24 displays a tolerance (tolerance in the frame G2) in the tolerance 205 column of the information input table 200.

  FIG. 16 is a modification of the standard tolerance level display function that can be performed using the assembly design support apparatus of FIG. 1, and shows a processing flow (16A) when a standard tolerance of a predetermined level is selected in the confirmation table. FIG. 16B is a diagram illustrating selection from standard tolerances by level. FIG. 17 is a diagram illustrating the standard tolerance of each level stored in the memory.

  The flow (16A) can be incorporated in addition to a part of the flow of FIG. Specifically, each processing flow from step S401 to step S403 in (16A) can be incorporated between the address assignment step (S115) and the additional change determination step (S116) in FIG. However, each processing flow shown in (16A) may be at any position after the confirmation table display step (S113) and before display of the tolerance analysis table 300.

(28) Step S401 (Standard Tolerance Level Selection Discrimination Step)
In this step, four types of options 351 of “fine grade”, “intermediate grade”, “rough grade”, and “very coarse grade” displayed so as to be selectable in the standard tolerance selection area 198 displayed in the confirmation table 230 , 352, 353, and 354, it is a step of determining whether or not one has been selected. The CPU 14 executes step S401 as the standard tolerance level selection determination unit 65. (16B) shows a situation in which the user instructs to select the option 352 from the standard tolerance selection area 198 in the confirmation table 230 (see the thick arrow). Since this step is the same as step S301 described above, a duplicate description is omitted. In the case of the page 260 called “hole / pin (back)”, it is determined from the standard tolerance level selection area 198a whether or not each tolerance zone class of the hole and the axis has been selected.

(29) Step S402 (standard tolerance level selection acceptance step)
This step is a step of accepting selection when one of the four choices 351, 352, 353, and 354 displayed in the standard tolerance selection area 198 is selectable. As for the standard tolerance level selection area 198 a, the CPU 14, which is a step for accepting selection of a tolerance zone class, accepts the selection as the standard tolerance level selection acceptance unit 33. Since this step is the same as step S302 described above, a duplicate description is omitted.

(30) Step S403 (second standard tolerance reading step)
In this step, the standard tolerance of the selected level is read from the memory 11 and acquired. As shown in FIG. 17, the memory 11 stores a table 360 in which a tolerance for each level according to a dimension range is set. The CPU 14 reads the standard tolerance corresponding to the level selected by the user (here, “intermediate” is illustrated) from the memory 11 as the second standard tolerance reading unit 34. Thereafter, the CPU 14 displays the intermediate standard tolerance (tolerance in the frame H) in the tolerance 246 column of the confirmation table 230. Further, as described above, the memory 11 stores the tables 361 and 362 in which the tolerance range is set in accordance with the size of each diameter of the hole and the shaft. The CPU 14 reads, as the second standard tolerance reading unit 34, the tolerance corresponding to the tolerance range class of the level selected by the user from the memory 11. Thereafter, the CPU 14 displays the read tolerance in the tolerance 265 column of the page 260 of the confirmation table 230.

  In FIGS. 16 and 17, the standard tolerance selection display on the page 240 referred to as “dimension on the calculation formula” has been described as an example. However, on the page 280 referred to as “geometric tolerance”, the same processing is performed for each level of standard tolerance. You can make a selection. In the confirmation table 230, the standard tolerance selection area 198 and the standard tolerance selection area 198a are provided in an area common to each page of the confirmation table 230 without providing the standard tolerance selection area 198 for each page 240, 260, and 280. Also good. In that case, the standard tolerance can be displayed only by executing the processing flow of FIG.

<2.4 Hole / Pin Diameter Difference Display Function>
FIG. 18 shows a processing flow (18A) of a hole / pin diameter dimensional difference display function that can be performed using the assembly design support apparatus of FIG. 1 and a diagram (18B) for explaining the function.

  The flow (18A) can be incorporated in addition to a part of the flow of FIG. Specifically, the process of step S501 in (18A) can be incorporated before the confirmation table display step (S113) in FIG.

(31) Step S501 (Hole / Pin Diameter Dimensional Difference Calculation Step)
This step is performed prior to the execution of step S113 after inputting information related to design numerical values for attributes required for a predetermined tolerance analysis. The CPU 14 executes step S501 as the hole / pin diameter dimensional difference calculation unit 35. Specifically, in this step, the difference between the median value of the diameters of the holes within the tolerance range and the median value of the diameters of the pins (shafts) within the tolerance range inserted into the holes is calculated. Thereafter, the calculation result in step S501 is displayed in the confirmation table 230. For example, as shown in (18B), the median value of the hole diameter (3.010 to 3.030 mm) within the tolerance range is 3.020 mm, and the pin diameter within the tolerance range inserted into the hole When the median value (2.980 to 3.000 mm) is 2.990 mm, the difference 0.03 mm is displayed in the center value (in the frame I) of the row of the play 274 in the page 260. Similarly, the median value of the hole diameter (2.010 to 2.030 mm) within the tolerance range is 2.020 mm, and the pin diameter (1.980 to 2.30 mm) within the tolerance range inserted into the hole. If the median value of (000 mm) is 1.990 mm, the difference of 0.03 mm is displayed in the center value (in the frame I) of the row of the play 279 in the page 260. The important point here is not the difference between the hole diameter and the pin diameter displayed in the dimension 264, but the median value of both the hole and the pin displayed in the center tolerance 266 (the reference value). The center value (within frame I) is calculated by subtracting each other. This is due to the fact that the holes and pins have a one-sided tolerance. Note that the calculation of the reference value and tolerance in the row of the central tolerance 266, and further the calculation of the central value are preferably performed in this step.

  FIG. 19 shows a processing flow (19A) of a modified example of the function shown in FIG. 18 and a diagram (19B) for explaining the function.

  Prior to the display of the tolerance analysis table 300, the flow of (19A) can be added and incorporated into a part of the flow of FIG. Specifically, the process of step S601 in (19A) can be incorporated between the tolerance analysis table display instruction determination step (S118) and the ID / address confirmation step (S119) in FIG.

(32) Step S601 (Hole / Pin Diameter Dimensional Difference Calculation Step)
This step is performed prior to the display of the tolerance analysis table 300. The CPU 14 executes step S601 as the hole / pin diameter dimensional difference calculation unit 35. The calculation method is the same as that in step S501 described above. This step is effective, for example, when there is no play in the confirmation table 230 as shown in (19B). In this step, the difference 0.03 mm obtained by subtracting the reference value 2.990 mm displayed in the center tolerance 266 row of the pin 273 from the reference value 3.020 mm displayed in the row of the center tolerance 266 of the hole 272 is a tolerance of 0.03 mm. This is displayed in the center value 381 of the “back 1” line of the analysis table 300. Similarly, the difference 0.03 mm obtained by subtracting the reference value 1.990 mm displayed in the center tolerance 266 row of the pin 278 from the reference value 2.020 mm displayed in the row of the center tolerance 266 of the hole 277 is a tolerance analysis. This is displayed at the center value 382 of the row of “table 2” in the table 300. The difference 0.03 mm obtained by subtracting the reference value 0.990 mm displayed in the center tolerance 266 row of the pin 373 from the reference value 1.020 mm displayed in the center tolerance 266 row of the hole 372 is a tolerance analysis table. It is displayed at the center value 383 of the row of “back 3” of 300 (refer to the inside of the thick black frame).

<2.5 Coefficient calculation formula creation function>
FIG. 20 shows a processing flow (20A) of a coefficient calculation formula creation function that can be performed using the assembly design support apparatus of FIG. 1 and a diagram (20B) for explaining the function.

  The flow (20A) can be incorporated in addition to a part of the flow of FIG. Specifically, the process of step S701 in (20A) can be incorporated before the confirmation table display step (S113) in FIG.

(33) Step S701 (Coefficient calculation formula creation step)
In this step, a coefficient calculation formula is created by using the design numerical values relating to the lever ratio. The CPU 14 creates a coefficient calculation formula as a coefficient calculation formula creation unit 36 using design numerical values (here, 48.100 and 37.000) related to the lever ratio.

  As shown in FIG. 10, the confirmation table 230 has display columns for coefficients 244, 263, and 283 on pages 240, 260, and 280, respectively. When the display column is selected and designated, the coefficient setting table 400 exemplified in (20B) is displayed. The coefficient setting table 400 includes a radio button 401 that is selected when it is desired to manually set a coefficient, and a radio button 402 that is selected when it is desired to automatically set a coefficient. When the radio button 402 is selected, a coefficient calculation formula 404 is displayed. Prior to the display of the coefficient calculation formula 404, up to the calculation formulas in which 48.100 is already assigned to the column 405 and 37.000 is already assigned to the column 406 are created by the coefficient calculation formula creation unit 36. When the user assigns 1 or 0 to the field 407 and designates the setting key 408 among the two types of keys, the setting key 408 and the cancel key 409, the coefficient is calculated by the coefficient calculation formula 404 in the display field such as the coefficient 244. The displayed coefficient is displayed.

<2.6 Geometric tolerance half-value calculation function>
FIG. 21 shows a processing flow (21A) of the geometric tolerance half-value calculation function that can be performed using the assembly design support apparatus of FIG. 1 and a diagram (21B) for explaining the function.

  The flow of (21A) can be incorporated in addition to a part of the flow of FIG. Specifically, the process in step S801 of (21A) can be incorporated before the confirmation table display step (S113) in FIG.

(34) Step S801 (Geometric tolerance half-value calculation step)
This step is a step of calculating a half value of a geometrical tolerance (in the example of 21B, 0.06 and 0.06 displayed as two contour degrees 421 and 422). The CPU 14 executes Step S801 as the geometric tolerance half-value calculation unit 37. Thereafter, the CPU 14 displays the geometric tolerance half value (0.03 in this example) as plus and minus on the page 280 of the confirmation table 230 as the confirmation table display unit 25.

  More specifically, as shown in (21B), the confirmation table display unit 25 sets 0.03 in the positive column 292a293a in each of the tolerance 285 columns of the dimensions 292 and 293, and the negative side. -0.03 is displayed in the columns 292b and 293b, respectively.

  FIG. 22 shows a processing flow (22A) of a modification of the function shown in FIG. 21 and a diagram (22B) for explaining the function.

  Prior to the display of the information input table 210, the flow of (22A) can be added and incorporated into a part of the flow of FIG. Specifically, the process of step S901 of (22A) can be incorporated between the attribute key selection receiving step (S108) and the information input table display step (S109) in FIG.

(35) Step S901 (Geometric tolerance half-value calculation step)
The processing content of this step is the same as that in step S801 described above. The CPU 14 executes step S <b> 901 as the geometric tolerance half-value calculation unit 37. After that, the CPU 14 displays the geometric tolerance half value (0.03 in this example) as plus and minus in the tolerance 215 column of the information entry table 210 as the information input table display unit 24. In the example shown in (22B), a set of half-values 0.03 and -0.03 is displayed in the ellipses 431 and 432 of thick dotted lines, respectively.

<2.7 Contribution-dependent tolerance allocation function>
FIG. 23 exemplifies the processing flow of the contribution rate-dependent tolerance allocation function that can be performed using the assembly design support device of FIG. FIG. 24 is a diagram illustrating an example in which tolerance allocation is performed using the contribution ratio for Σ. FIG. 25 is a diagram illustrating an example in which tolerance is allocated using a contribution ratio for √.

  The flow of FIG. 23 can be additionally incorporated before and after the display of the tolerance analysis table 300. Specifically, the process of step S1001 in FIG. 23 can be performed before the third display step (S121). Moreover, the process of each step from step S1002 to step S1004 in FIG. 23 can be performed after the third display step (S121).

(36) Step S1001 (Contribution rate setting / calculation step)
This step sets or calculates a contribution rate (%) that quantitatively indicates how much the dimensional tolerance or geometric tolerance of each part of the assembly 180 contributes to the overall tolerance such as the dimension to be analyzed. It is. The contribution rate may be specified by any method such as calculation based on design values such as user settings and dimensions. In this embodiment, an example in which the contribution rate is defined by calculation will be described. However, a method of reading the contribution rate list from the memory 11 and setting the contribution rate corresponding to each tolerance may be adopted. The CPU 14 executes step S <b> 1001 as the contribution rate setting / calculation unit 38. Specifically, the CPU 14 calculates a contribution rate for each piece of information related to the numerical value for design displayed in the tolerance analysis table 300 in the case of YES in step S118. More specifically, in this embodiment, the contribution ratio (%) for Σ is a coefficient obtained by multiplying the tolerance corresponding to the contribution ratio by a coefficient (corresponding to the lever ratio; the same applies hereinafter) to the coefficient of all tolerances. Divided by the sum of those multiplied by 100 and multiplied by 100. Further, the contribution ratio (%) for √ is obtained by dividing the square of a value obtained by multiplying the tolerance corresponding to the contribution ratio by a coefficient by the sum of the squares of the values obtained by multiplying each tolerance by a coefficient. Calculated by multiplying by In a tolerance analysis that does not require a lever ratio, a coefficient need not be involved in calculating the contribution rate. Thereafter, the CPU 14 displays a tolerance analysis table 300 having a contribution rate as the tolerance analysis table display unit 27. At this stage, in the tolerance analysis table 300 illustrated in FIG. 24, dimensions and tolerances are displayed in the “current state” column of the column “dimensions and tolerances”. However, the column “After Improvement” in “Dimensions and Tolerances” (the column surrounded by the frame K in FIG. 24) is blank.

(37) Step S1002 (contribution rate selection determination step)
This step is a step of determining whether or not one of the contribution rate selection keys has been selected after the tolerance analysis table 300 is displayed. The CPU 14 executes step S1002 as the contribution rate selection determination unit 66 (an example of a contribution rate selection determination unit). If the result of determination in step S1002 is YES, the CPU 14 executes step S1003. On the other hand, if the result of the determination is NO, the CPU 14 continues step S1002. In the tolerance analysis table 300 illustrated in FIG. 24, the contribution rate selection key means a key 311 called “Σ allocation” and a key 312 called “√ allocation”. However, the contribution rate selection keys are not limited to these two keys 311 and 312, but only one of the keys 311 and 312 or three or more obtained by adding one or more keys to the keys 311 and 312. The key can be.

(38) Step S1003 (contribution rate selection acceptance step)
This step is a step of accepting the selection when one of the contribution rate selection keys is selected as a result of the determination in step S1002. FIG. 24 exemplifies a situation where the user has instructed the key 311 called “Σ allocation”. The CPU 14 executes step S1003 as the contribution rate selection receiving unit 40. As a result, an instruction from the key 311 called “Σ allocation” is accepted.

(39) Step S1004 (contribution rate dependent tolerance calculation step)
In this step, the tolerance displayed in the tolerance analysis table 300 is calculated depending on the selected contribution rate. The CPU 14 executes Step S1004 as the contribution rate dependent tolerance calculation unit 39. In FIG. 24, as a result of the selection of the key 311, the user sets the contribution rate displayed in the “for Σ” column (the column surrounded by the frame L) in the “contribution rate (%)”. An example is shown in which tolerances are assigned from the overall tolerance design target value (± 0.2 in FIG. 24). In this calculation, a coefficient corresponding to the lever ratio is also taken into consideration. Specifically, as shown in the lower margin of FIG. 24, the tolerance value is finally obtained by dividing by a coefficient. For example, for the diameter of the hole of number G, a tolerance of 0.0097 is obtained by dividing by a factor of 0.5. As a result of the processing of this step, the dimension displayed in the “current state” and the tolerance 0.2 on the plus side (or minus side) of the design target value are allocated according to the contribution rate in the box K. Tolerance is displayed. The calculation method is as described in the lower margin of the tolerance analysis table 300 of FIG. As is clear from FIG. 24, the tolerance (after allocation) in the “after improvement” column is different from the tolerance (before allocation) in the “current” column.

  FIG. 25 exemplifies a situation where the user has instructed the key 312 referred to as “allocation for √”. The CPU 14 executes step S1003 as the contribution rate selection receiving unit 40. As a result, an instruction of the key 312 referred to as “√ allocation” is accepted. Thereafter, the CPU 14 executes step S1004 as the contribution rate-dependent tolerance calculation unit 39. In FIG. 25, as a result of the selection of the key 312, the user sets the contribution rate displayed in the “√” column (the column surrounded by the frame M) in the “contribution rate (%)”. An example is shown in which tolerances are assigned from the overall tolerance design target value (± 0.2 in FIG. 24). In this calculation, a coefficient corresponding to the lever ratio is also taken into consideration. Specifically, as shown in the equation below the lower column in FIG. 25, the value of the square root is finally divided by a coefficient to obtain a tolerance value. For example, for the diameter of the hole with the number G, a tolerance of 0.0249 is obtained by dividing by a factor of 0.5. As a result of the processing of this step, the dimension displayed in the “current state” and the tolerance 0.2 on the plus side (or minus side) of the design target value are allocated according to the contribution rate in the box K. Tolerance is displayed. The calculation method is as described in the lower margin of the tolerance analysis table 300 in FIG. As is clear from FIG. 25, the tolerance (after allocation) in the “after improvement” column is different from the tolerance (before allocation) in the “current” column and the tolerance (after allocation) in the “after improvement” column in FIG. ing. Thus, the numerical value of the tolerance after allocation differs depending on whether the contribution rate is for Σ or for √. However, the calculated tolerance is common in that it depends on the contribution rate. In the contribution rate setting / calculation step and the contribution rate dependent tolerance calculation step, the calculation may be performed without considering the lever ratio.

  FIG. 26 shows a modification of the flow of FIG. FIG. 27 is a diagram illustrating an example of performing tolerance allocation based on the contribution rate according to the flow of FIG.

  The flow of FIG. 26 is obtained by incorporating additional steps S1011 to S1013 between steps S121 and S1002 in the flow of FIG.

(40) Step S1011 (calculation target exclusion selection determination step)
This step is a step of determining whether or not an operation for selecting a tolerance to be excluded from the tolerance allocation calculation based on the contribution rate is performed after the third display step (S121). The CPU 14 executes step S1011 as the calculation target exclusion selection determination unit 67 (an example of a calculation target exclusion selection determination unit). If the result of determination in step S1011 is YES, the CPU 14 executes step S1012. On the other hand, if the result of determination in step S1011 is NO, the CPU 14 executes step S1002. In the tolerance analysis table 300 illustrated in FIG. 27, the check box displayed in the “fixed” column in the “dimension and tolerance” column is a check box for fixing the tolerance. In FIG. 27, the six tolerances whose check boxes are black are excluded from the calculation of the tolerance allocation based on the contribution ratio to be performed (tolerances of numbers B, E, G to J surrounded by the frame N). See).

(41) Step S1012 (calculation target exclusion instruction receiving step)
This step is a step of accepting a tolerance instruction to be excluded from the tolerance allocation calculation based on the contribution rate from the user. The CPU 14 executes step S1012 as the calculation target exclusion instruction receiving unit 41. As a result, in FIG. 27, a tolerance that is a target of a check box with a black check box is accepted.

(42) Step S1013 (Tolerance fixing step)
This step is a step of fixing the tolerance accepted in step S1012. The CPU 14 executes step S1013 as the tolerance fixing unit 42. Thereafter, the CPU 14 performs processing from step S1002 to step S1004. The calculation in step S1004 is performed for objects other than the fixed tolerance. The above-described calculation relates to the Σ contribution rate, but the same applies to the √contribution rate. In other words, the tolerance whose check box is black is excluded from the calculation of the tolerance allocation based on the contribution ratio and the coefficient (lever ratio), and the tolerance allocation is executed only with the remaining tolerance. For example, when the tolerance shown in FIG. 27 is fixed, the contribution ratio for Σ is calculated as 100−24.23−18.66−2.4−2.4−42−0.56−0.56 = 53.5. Tolerance values range from an overall tolerance of 0.2 to 0.05 × 1-0.05 × 0.77-0.01 × 0.5-0.01 × 0.5-0.01 × 0.12- Subtract 0.01 × 0.12 to get about 0.1. Therefore, in the line of number A in the tolerance analysis table 300, the tolerance after allocation is 0.0045 by dividing 0.1 × 2.42 / 53.5 by the coefficient “1”. Further, the contribution ratio for √ is calculated as 100−38.82−23.01−0.388−0.388−0.021−0.021 = 37.352. The tolerance value is from the square of the overall tolerance of 0.2 to the square of 0.05— (0.05 × 0.77) squared— (0.01 × 0.5) squared— (0 .01 × 0.5) squared− (0.01 × 0.12) squared− (0.01 × 0.12) squared is about 0.036. Therefore, in the line of number A in the tolerance analysis table 300, the tolerance after allocation is the same as described above except that the tolerance is divided by the coefficient “1”, and [SQRT (0.036 × 0.388 / 37.352)] /1=0.01934.

<2.8 Tolerance analysis result reflection function>
FIG. 28 shows a processing flow (28A) of a tolerance analysis result reflecting function that can be performed using the assembly design support apparatus of FIG. 1 and a diagram (28B) illustrating the function.

  The flow (28A) can be additionally incorporated after the display of the tolerance analysis table 300, that is, after the third display step (S121).

(43) Step S1021 (information input / change determination step)
This step is a step of determining whether or not information has been input or changed (referred to as input) to the tolerance analysis table 300 and there has been an instruction to display on the display screen 151. More specifically, the CPU 14 determines whether or not the import instruction key 157 of the file 150 is instructed as the information input / change determination unit 68 (an example of the information input / change determination unit). If the result of this determination is YES, the CPU 14 executes step S1022. On the other hand, if the result of this determination is NO, the CPU 14 continues step S1021.

(44) Step S1022 (information input / change acceptance step)
This step is a step of receiving information input to the tolerance analysis table 300 and displayed on the display screen 151. The CPU 14 executes step S1022 as the information input / change receiving unit 43. When the tolerance is examined in the tolerance analysis table 300 and the result is to be displayed together with the image A of the assembly 180, the CPU 14 accepts the tolerance information according to the instruction of the import instruction key 157 of the file 150. The information may include not only tolerances but also numerical values for design, names input by the user, and the like.

(45) Step S1023 (information update display step)
This step is a step for displaying the information received in step S1022 on the display screen 151. The CPU 14 executes step S1023 as the information update display unit 69. By this step, if there is a design numerical value already displayed on the display screen 151, it is updated to a new design numerical value.

  The above-described tolerance analysis result reflecting function is preferably a function exhibited by bridging information from the tolerance analysis computer program 82 to the tolerance setting computer program 81. If the information flow from the tolerance setting computer program 81 to the tolerance analysis computer program 82 is “outward”, the information flow in the tolerance analysis result reflecting function is “return”. As shown in (28B), information such as tolerances examined in the tolerance analysis table 300 (for example, information surrounded by a frame O) is attached to the image of the assembly 180 in the form of a dotted oval 451, 452, 453, 454, and 455 are displayed as tolerances. Even if only the dimension that does not include the tolerance is displayed along with the image of the assembly 180 before the display, only the information that does not include the tolerance is overwritten by the information that includes the tolerance.

<2.9 Numerical switching function for design by analysis>
FIG. 29 is a process flow (29A) of the numerical value switching function for design by analysis that can be performed using the assembly design support apparatus of FIG. Show.

  The flow of (29A) can be additionally incorporated after display of the display screen 151, that is, after the first display step (S102).

(46) Step S1031 (Tolerance analysis selection determination step)
This step is a step of determining whether one of “analysis 1” and “analysis 2” in the analysis selection key area D is selected in the file 150. The CPU 14 executes step S1031 as the tolerance analysis selection determination unit 70 (an example of a tolerance analysis selection determination unit). In the file 150 illustrated in (29B), “Analysis 1” is selected by selecting the analysis selection key 170 (see the thick arrow). However, the user may select another tolerance analysis such as “Analysis 2” from the window 171. If the result of this determination is YES, the CPU 14 executes step S1032. On the other hand, if the result of this determination is NO, the CPU 14 continues step S1031.

(47) Step S1032 (Tolerance analysis selection acceptance step)
This step is a step of accepting the selection when a predetermined type of analysis is selected from the analysis selection key area D. The CPU 14 executes step S1032 as the tolerance analysis selection receiving unit 44. In the tolerance analysis of the assembly 180, there may be a plurality of tolerance analysis targets such as the amount of meshing between gears and the gap between parts other than gears. Depending on the tolerance analysis, the dimensional and geometric tolerances selected by the user are naturally different. The design numerical value displayed on the display screen 151 of (29B) is necessary for analysis 1, but when analysis 2 is selected, the numerical value for design required for analysis 2 is displayed. The numerical value for design displayed at the time of selecting analysis 1 and the numerical value for design displayed at the time of selecting analysis 2 may coincide by chance, but are usually different.

(48) Step S1033 (Design Value Reading Step)
This step is a step of reading the design numerical value corresponding to the analysis accepted in the previous step S1032 from the memory 11. The CPU 14 executes step S1033 as the design numerical value reading unit 45. More specifically, the CPU 14 reads out design numerical values divided for each analysis in the memory 11. The memory 11 stores one or more design numerical values corresponding to the type of tolerance analysis. For this reason, if a tolerance analysis is specified, a numerical value for design necessary for the tolerance analysis can be read from the memory 11.

(49) Step S1034 (design numerical value display step)
This step is a step of displaying the design numerical value read from the memory 11 in the display screen 151. The CPU 14 executes step S1034 as the first display unit 21.

<2.10 Attribute display form change function>
FIG. 30 shows a processing flow (30A) of the attribute display form change function that can be performed using the assembly design support device of FIG. 1 and a figure (30B) that explains the state of changing the display form.

  The flow (30A) can be additionally incorporated after step S1034 described above, that is, after a specific design numerical value is displayed by selection of analysis. However, in the assembly design support apparatus 1 that does not have the analysis-specific design numerical value switching function, the flow (30A) may be incorporated after the file 150 is displayed in the first display step (S102).

(50) Step S1041 (attribute display form change determination step)
This step is a step of displaying the design numerical value related to the specific attribute selected from the user so as to be differentiated from the design numerical value related to the other attribute by changing the display form. The change in the display form includes, but is not limited to, highlight display, size change, blinking, and the like. CPU14 performs step S1041 as the attribute display form change determination part 71 (an example of an attribute display form change determination means). More specifically, the CPU 14 determines whether or not one of the attribute display keys 162, 163, 164, and 165 in the attribute display key area C is selected in the file 150 illustrated in (30B). If the result of this determination is YES, the CPU 14 executes step S1042. On the other hand, if the result of this determination is NO, the CPU 14 continues step S1041.

(51) Step S1042 (attribute display form change acceptance step)
This step is a step of receiving an instruction to change the attribute display form from the user. The CPU 14 executes step S <b> 1042 as the attribute display form change receiving unit 47. For example, in the file 150 illustrated in (30B), when the attribute display key 162 in the attribute display key area C is selected (see the black arrow), the CPU 14 has an attribute “dimension on the calculation formula”. Accept the selection.

(52) Step S1043 (display mode changing step)
This step is a step of changing the display form of the numerical value for design related to the attribute accepted in step S1042. The CPU 14 executes step S <b> 1043 as the display form changing unit 48. More specifically, the CPU 14 accesses the information in the memory 11 to change the display form of the design numerical value related to the attribute received by the attribute display form change receiving unit 47 to the design numerical value related to another attribute. Change the display form. Thereafter, the CPU 14 displays the design numerical value changed by the display form changing unit 48 on the display screen 151 as the first display unit 21. For example, on the display screen 151 of (30B), five types of dimensions (numerical values surrounded by an ellipse with a thick dotted line) related to the attribute “dimension on the calculation formula” are highlighted. On the other hand, when the “hole / pin (back)” attribute display key 163 is selected, the dimension related to the attribute “hole / pin (back)” is highlighted.

<2.11 Numerical value display form change function for design>
FIG. 31 shows a processing flow (31A) of a design numerical value display form changing function that can be performed using the assembly design support apparatus of FIG.

  The flow of (31A) can be additionally added after the display of the confirmation table 230, preferably after step S115.

(53) Step S1051 (in-table information designation determination step)
This step is a step of determining whether or not the information in the confirmation table 230 is designated. The CPU 14 executes step S1051 as the in-table information designation determination unit 72 (an example of the in-table information designation determination unit). If the result of this determination is YES, the CPU 14 executes step S1052. On the other hand, if the result of this determination is NO, the CPU 14 executes step S116.

(54) Step S1052 (in-table information designation receiving step)
This step is a step of accepting that the information is designated when the information in the confirmation table 230 is designated by the user. The CPU 14 executes step S1052 as the in-table information designation receiving unit 49. In the page 240 of the confirmation table 230 illustrated in (31B), when the user instructs a part of the dimension 255 to be put on the calculation formula (see the thick arrow), the CPU 14 accepts the instruction.

(55) Step S1053 (Numerical display form changing step for design)
This step is information that matches the information received by the in-table information designation receiving unit 49, and is a step of displaying the design numerical value displayed by the first display unit 21 in place of other design numerical values. is there. The CPU 14 executes step S1053 as the design numerical value display form changing unit 50. In the image of the assembly 180 illustrated as an example in (31B), only the numerical value for design corresponding to the dimension 255 on the calculation formula is displayed in a form different from the other numerical values for design (see the ellipse 476 with a thick dotted line). On the other hand, when the dimension 254 to be applied to the calculation formula is selected, a numerical value for design different from the numerical value for design surrounded by an ellipse 476 with a thick dotted line is displayed in a form different from other numerical values for design. Note that “different forms” include, but are not limited to, highlight display, size change, and blinking. The same applies to the “different forms” thereafter.

  FIG. 32 shows a modified example (32A) of the flow of (31A) and a diagram (32B) illustrating a situation in which the display form is changed according to the modified example.

  The flow (32A) can be incorporated after the tolerance analysis table 300 is displayed, that is, after step S121. In this flow, the display form of a specific design numerical value can be changed in the tolerance analysis table 300 instead of the confirmation table 230.

(56) Step S1061 (in-table information designation determination step)
This step is a step of determining whether or not information in the tolerance analysis table 300 is designated. The CPU 14 executes step S1061 as the in-table information designation determination unit 72. Since the content of this step is the same as that of step S1051 described above, redundant description is omitted.

(57) Step S1062 (in-table information designation receiving step)
In this step, when information in the tolerance analysis table 300 is designated by the user, it is a step of accepting that the information has been designated. The CPU 14 executes step S1062 as the in-table information designation receiving unit 49. In the tolerance analysis table 300 illustrated in (32B), when the user instructs a part of the information in the row of number E (see the thick arrow), the CPU 14 accepts the instruction.

(58) Step S1063 (design numerical value display form changing step)
This step is information that matches the information received by the in-table information designation receiving unit 49, and is a step of displaying the design numerical value displayed by the first display unit 21 in place of other design numerical values. is there. The CPU 14 executes step S1063 as the numerical value display form changing unit 50 for design. In the image of the assembly 180 illustrated in (32B), only the design numerical value corresponding to the number E is displayed in a form different from the other design numerical values (see the ellipse 480 indicated by the thick dotted line). On the other hand, when the number C is selected, the numerical value for design (dimension: 17.600) different from the numerical value for design enclosed by the bold dotted ellipse 480 is displayed in a form different from the other numerical values for design. The

<2.12 One-side tolerance change display function>
FIG. 33 shows a processing flow of a one-side tolerance change display function that can be performed using the assembly design support device of FIG.

  The flow of FIG. 33 can be added and incorporated before display of the tolerance analysis table 300, for example, immediately after step S118.

(59) Step S1071 (one-side tolerance presence / absence determination step)
This step is a step of determining whether or not the design numerical value includes a one-sided tolerance. One-sided tolerance refers to the tolerance of a numerical value for design that does not have a reference value at the center between the maximum value and the minimum value (variation range). “1.0 + 0.05, −0.1” or “1.0 + 0.04, +0.2” is an example of a numerical value for design including a one-sided tolerance. The CPU 14 executes step S1071 as the one-side tolerance presence / absence determination unit 51. Specifically, the CPU 14 determines whether a one-sided tolerance is included in the tolerances such as dimensions displayed in the confirmation table 230. If the result of this determination is YES, the CPU 14 executes step S1072. On the other hand, if the result of this determination is NO, the CPU 14 does not make a special display change. For example, the CPU 14 executes step S1073 (display maintenance step).

(60) Step S1072 (one-side tolerance calculation step)
This step is a step of obtaining a half value of the one-side tolerance when the one-side tolerance is included. That is, the one-side tolerance value is divided into plus and minus. The CPU 14 executes Step S1072 as the one-side tolerance calculation unit 52. For example, it is assumed that a one-sided tolerance exists among the tolerances displayed together with the image A on the display screen 151. In this case, in the tolerance analysis table 300, as shown in (33B), the one-side tolerance state is displayed in the “Dimension and tolerance” column. However, in the “center dimension and tolerance”, “effective value of center dimension” and “tolerance calculation” fields, numerical values in a state where the one-side tolerance is corrected can be displayed. Specifically, it is assumed that 8.1 (one-side tolerance: 0 to −0.2) is described in the “current state” of the number A. In that case, it is rewritten and displayed as 8.0 (tolerance: ± 0.1) in the columns of “center dimension and tolerance”, “effective value of center dimension”, and “tolerance calculation”. Here, if the one-sided tolerance display is simply rewritten with a ± tolerance display, the original reference value (8.1) becomes a contradictory numerical value, so that 8.1 is set to 8.0 so as not to contradict. Rewritten. This calculation is also executed by the one-side tolerance calculation unit 52. In addition, 17.6 (one-sided tolerance: 0.2-0) displayed in the “current state” of the number C is the column of “center dimension and tolerance”, “effective value of center dimension”, and “tolerance calculation”. , 17.7 (tolerance: ± 0.1). Again, since the original reference value (17.6) is a contradictory value, 17.6 is rewritten to 17.7 so as not to contradict.

(61) Step S1073 (display maintenance step)
This step is a step in which the tolerance display is not changed. CPU14 performs step S1073 as the display maintenance part 75 (an example of a display maintenance means). When the tolerances other than the numbers A and C shown in (33B) are not one-side tolerances, the tolerances other than the numbers A and C are not subjected to the one-side tolerance calculation step, and are displayed as they are. After step S1072 or step S1073, the CPU 14 executes step S119.

  As a modification of the one-side tolerance change display function, the calculation result of the one-side tolerance can be displayed even in the “current state” of “dimensions and tolerances” of the tolerance analysis table 300. As another modified example, it can also be executed in the confirmation table 230 or the information input table 190. In that case, the CPU 14 determines, as the one-side tolerance presence / absence determination unit 51, whether or not one-side tolerance is included in tolerances such as dimensions displayed in the information input table 190 or the display screen 151. As a result, if there is a one-side tolerance, the CPU 14 calculates the half value of the one-side tolerance as the one-side tolerance calculation unit 52. Thereafter, the CPU 14 can display the half value of the one-sided tolerance as plus or minus in the information input table 190 or the like or the tolerance analysis table 230 as the information input table display unit 24 or the tolerance analysis table display unit 27, respectively.

<2.13 Analysis result comparison display function>
FIG. 34 shows a processing flow (34A) of the analysis result comparison display function that can be performed using the assembly design support apparatus of FIG. FIG. 35 shows an example of the analysis result displayed following the operation (34B).

  The flow (34A) can be added and incorporated after the tolerance analysis table 300 is displayed.

(62) Step S1081 (analysis result list display selection determination step)
This step is a step of discriminating whether or not a list of the tolerance analysis results has been selected after performing one type or two or more types of tolerance analysis. Generally, the list display is selected after two or more tolerance analyses, but the list display may be selected after only one tolerance analysis. The CPU 14 executes step S1081 as the analysis result list display selection determination unit 73 (an example of the analysis result list display selection determination unit). If the result of this determination is YES, the CPU 14 executes step S1082. On the other hand, if the result of this determination is NO, the CPU 14 continues step S1081. The tolerance analysis table 300 exemplified in (34B) preferably includes a key 310 called “analysis result list”. In the tolerance analysis table 300, the CPU 14 determines whether or not the key 310 has been instructed (see the black arrow).

(63) Step S1082 (Analysis result list display selection receiving step)
This step is a step of accepting the selection when a selection for displaying a list of tolerance analysis results is made. The CPU 14 executes step S1082 as the analysis result list display selection receiving unit 74 (an example of an analysis result list display selection receiving unit).

(64) Step S1083 (Analysis result list display step)
This step is a step of comparing and displaying each analysis result for each analysis of the tolerance after the selection. The CPU 14 executes Step S1083 as the analysis result list display unit 46. FIG. 35 is an example of the analysis list table 490 displayed by executing step S1083. In this example, the results of two types of analysis (“Analysis 1” and “Analysis 2”) are compared and displayed. FIG. 35 displays the result of frame P (result of “analysis 1”) and the result of frame Q (result of “analysis 2”) side by side. However, the display method is not limited to the example of FIG. For example, it may be displayed in a book format.

  As described above, when a plurality of analysis results can be compared and displayed, a portion requiring further correction of tolerance can be found while comparing the analysis results. As a result, a more favorable design is possible through retry of tolerance analysis.

<2.14 Other functions>
FIG. 36 shows a partial modification of the tolerance analysis table of FIG. FIG. 37 shows examples (37A, 37B, 37C) of graphs displayed by selecting and instructing keys outside the margin of the tolerance analysis table of FIG.

  The tolerance analysis table 300 of FIG. 36 includes a key 500 called a “Σ contribution graph”, a key 501 called a “√ contribution graph”, and a key 502 called a “normal distribution curve graph”. Have When the key 500 is selected, a graph (37A) is displayed. When the key 501 is selected, a graph (37B) is displayed. With these graphs, the contribution rate for Σ and the contribution rate for √ in the tolerance analysis table 300 can be visually confirmed. When the key 502 is selected (see the thick arrow), the graph (37C) is displayed. This graph shows the median μ, standard deviation σ, ± 3σ, standard value, upper limit standard, lower limit standard, upper Kε, lower Kε, upper defect rate, lower defect rate, total defect rate derived from tolerance analysis results , Cp, and Cpk can be shown, and this information can be visually confirmed to allow quick examination of tolerance settings.

3. Tolerance Setting Computer Program and Tolerance Analysis Computer Program A tolerance setting computer program 81 according to this embodiment is installed in the assembly design support apparatus (computer) 1, and is a numerical value representing the form of the parts constituting the assembly 180. It is a computer program capable of setting a tolerance of at least one design numerical value representing a distance between parts. The tolerance setting computer program 82 according to this embodiment is a computer program that is installed in the assembly design support apparatus (computer) 1 and that can analyze the tolerance in conjunction with the tolerance setting computer program 81. The computer programs 81 and 82 are stored in the information recording medium 80 exemplified above and can be distributed in the market. The computer programs 81 and 82 may be downloaded from a server installed outside the assembly design support apparatus 1 to the memory 11 of the assembly design support apparatus 1 and used. Further, the tolerance setting computer program 81 and the tolerance setting computer program 82 are not limited to a single computer program, and may be composed of two or more computer programs. Alternatively, the tolerance setting computer program 81 and the tolerance setting computer program 82 may be integrated to constitute one assembly design support computer program.

(1) The tolerance setting computer program 81 uses the assembly design support apparatus 1 as the first display unit 21, the design numerical value selection reception unit 22, the attribute key selection reception unit 23, the information input table display unit 24, or the confirmation table display. This is a computer program that functions as the unit 25 and the information writing instruction unit 26.

(2) The tolerance setting computer program 81 preferably causes the assembly design support apparatus 1 to further function as the ID assigning unit 28.

(3) The tolerance setting computer program 81 preferably causes the assembly design support apparatus 1 to further function as the address assigning unit 29. In this case, the information writing instruction unit 26 can issue an instruction to write information related to the numerical value for design at a location corresponding to the address.

(4) The tolerance setting computer program 81 preferably causes the assembly design support apparatus 1 to further function as the dimension tolerance presence / absence determining unit 30, the display tolerance priority unit 31, and the first standard tolerance reading unit 32. In this case, the information input table display unit 24 or the confirmation table display unit 25 sets the dimensional tolerance acquired by the display tolerance priority unit 31 or the standard tolerance acquired by the first standard tolerance reading unit 32 as the information input table 190 or the like. It can be displayed on the confirmation table 230.

(5) Preferably, the tolerance setting computer program 81 further causes the assembly design support apparatus 1 to function as the standard tolerance level selection receiving unit 33 and the second standard tolerance reading unit 34. Here, the memory 11 is means for storing a plurality of types of standard tolerances for each level. Further, the information input table display unit 24 or the confirmation table display unit 25 is a means for displaying a plurality of options for each level of a predetermined standard tolerance. The information input table display unit 24 or the confirmation table display unit 25 can display the standard tolerance read by the second standard tolerance reading unit 34.

(6) The tolerance setting computer program 81 preferably causes the assembly design support device 1 to further function as the hole / pin diameter size difference calculation unit 35. In this case, the attribute includes a combination of the diameter of the hole in the assembly 180 and the diameter of the pin inserted into the hole. The information input table display unit 24 or the confirmation table display unit 25 can display the above dimensional difference.

(7) The tolerance setting computer program 81 preferably causes the assembly design support device 1 to further function as the coefficient calculation formula creation unit 36. In this case, the attribute includes a lever ratio that is positioned as a sensitivity to dimensional tolerances. The information input table display unit 24 or the confirmation table display unit 25 can display the coefficient automatic setting using the above-described coefficient calculation formula in the information input table 190 or the like or the confirmation table 230 in a selectable manner.

(8) The tolerance setting computer program 81 preferably causes the assembly design support apparatus 1 to further function as the geometric tolerance half-value calculation unit 37. In this case, the attribute includes a geometric tolerance that is positioned as a range of allowable deviation from the ideal shape, posture, or position of the part. The information input table display unit 24 or the confirmation table display unit 25 can display the half value of the geometric tolerance as plus and minus.

(9) The tolerance setting computer program 81 preferably causes the assembly design support apparatus 1 to further function as the tolerance analysis selection receiving unit 44 and the design numerical value reading unit 45. The first display unit 21 can display a tolerance analysis selection key 170 and the like. The first display unit 21 can display the design numerical values read out by the design numerical value reading unit 45.

(10) The tolerance setting computer program 81 preferably further functions as the assembly design support apparatus 1 as an attribute display form change receiving unit 47 and a display form changing unit 48 for receiving one selection of the attribute display form change key. Let In this case, the memory 11 stores a design numerical value display form in association with each attribute. The first display unit 21 can display an attribute display form change key 162 and the like. The first display unit 21 can display the design numerical values changed by the display form changing unit 48 on the display screen 151.

(11) The tolerance setting computer program 81 preferably causes the assembly design support apparatus 1 to further function as the in-table information designation receiving unit 49 and the design numerical value display form changing unit 50.

(12) The tolerance setting computer program 81 preferably causes the assembly design support apparatus 1 to further function as the one-side tolerance presence / absence determining unit 51 and the one-side tolerance calculating unit 52. In this case, the information input table display unit 24 or the confirmation table display unit 25 can display the half value of one-sided tolerance as plus and minus as tolerances.

  As long as each structural requirement of said (1)-(12) includes at least each structural requirement of (1), 1 or 2 or more of each structural requirement of (2)-(12) is arbitrarily combined. However, the case where combination is impossible is excluded.

(13) The tolerance analysis computer program 82 causes the assembly design support apparatus 1 to function as the tolerance analysis table display unit 27 in conjunction with the tolerance setting computer program 81.

(14) The tolerance analysis computer program 82 preferably causes the assembly design support apparatus 1 to further function as the contribution rate setting / calculation unit 38 and the contribution rate dependent tolerance calculation unit 39. In each calculation of the contribution rate setting / calculating unit 38 and the contribution rate dependent tolerance calculating unit 39, a lever ratio can be used. However, it can also be calculated without using the lever ratio.

(15) The tolerance analysis computer program 82 preferably causes the assembly design support device 1 to further function as the contribution rate selection receiving unit 40. In this case, the tolerance analysis table 300 displays contribution rate selection keys 311 and 312 for calculating a tolerance based on one of two or more types of contribution rates. Further, the contribution rate dependent tolerance calculation unit 39 performs calculation based on the selection from the contribution rate selection keys 311 and 312.

(16) The tolerance analysis computer program 82 preferably causes the assembly design support apparatus 1 to further function as the calculation object exclusion instruction receiving unit 41 and the tolerance fixing unit 42. In this case, the contribution rate dependent tolerance calculation unit 39 calculates a tolerance depending on the contribution rate for other tolerances except for the tolerance fixed by the tolerance fixing unit 42, and allocates a target set value of the overall tolerance. .

(17) The tolerance analysis computer program 82 preferably causes the assembly design support apparatus 1 to further function as the information input / change receiving unit 43 and the information update display unit 69.

(18) The tolerance analysis computer program 82 preferably causes the assembly design support apparatus 1 to further function as the analysis result comparison display unit 46.

  As long as each structural requirement of said (13)-(18) includes at least each structural requirement of (13), 1 or 2 or more of each structural requirement of (14)-(18) is arbitrarily combined. However, the case where combination is impossible is excluded.

4). Assembly Design Support Method (1) The assembly design support method according to this embodiment is a method performed using the assembly design support apparatus 1 that includes the CPU 14 and the memory 11 and supports the design of the assembly 180. . The assembly design support method includes the first display step, the design numerical value selection reception step, the attribute key selection reception step, the second display step, the information writing instruction step, and the third display step described above. including.

(2) The assembly design support method preferably further includes an ID assigning step.

(3) The assembly design support method preferably further includes an address assignment step.

(4) Preferably, the assembly design support method further includes a dimension tolerance presence / absence determination step, a display tolerance priority step, and a first standard tolerance readout step.

(5) The assembly design support method preferably further includes a standard tolerance level selection receiving step and a second standard tolerance reading step. Thereafter, in the second display step, the standard tolerance read in the second standard tolerance reading step is displayed.

(6) The assembly design support method preferably further includes a hole / pin diameter dimensional difference calculating step. In this case, the attribute includes a combination of the diameter of the hole in the assembly and the diameter of the pin inserted into the hole. As a result, in the second display step, the dimensional difference is displayed on the information input table 190 or the like (or the confirmation table 230).

(7) The assembly design support method preferably further includes a coefficient calculation formula creation step. In this case, the attribute includes a lever ratio that is positioned as a sensitivity to dimensional tolerances. Thereby, in the second display step, the automatic setting of the coefficient using the coefficient calculation formula is displayed in the information input table 190 or the like (or the confirmation table 230) in a selectable manner.

(8) The assembly design support method preferably further includes a geometric tolerance half-value calculation step. In this case, the attribute includes a geometric tolerance that is positioned as a range of allowable deviation from the ideal shape, posture, or position of the part. Thereby, in the second display step, the half value of the geometric tolerance is displayed as plus or minus in the information input table 190 or the like (or the confirmation table 230).

(9) The assembly design support method preferably further includes a contribution rate setting / calculation step and a contribution rate dependent tolerance calculation step. In the contribution rate dependent tolerance calculation step, for example, calculation corresponding to the contribution rate for Σ or the contribution rate for √ can be performed. In the contribution rate dependent tolerance calculation step, calculation corresponding to only the contribution rate for Σ or the contribution rate for √ may be performed. The lever ratio can also be used in each calculation of the contribution rate setting / calculation step and the contribution rate dependent tolerance calculation step. However, it can also be calculated without using the lever ratio.

(10) The assembly design support method preferably further includes a contribution rate selection receiving step. In the contribution rate dependent tolerance calculation step, calculation can be performed based on the selection from the contribution rate selection keys 311 and 312.

(11) The assembly design support method preferably further includes a calculation object exclusion instruction receiving step and a tolerance fixing step. In this case, in the contribution rate-dependent tolerance calculation step, a tolerance depending on the contribution rate is calculated for other tolerances excluding the tolerance fixed in the tolerance fixing step.

(12) The assembly design support method preferably further includes an information input / change receiving step and an information update display step.

(13) The assembly design support method preferably further includes a tolerance analysis selection receiving step and a design numerical value reading step. In this case, in the first display step, the tolerance analysis selection key 170 or the like can be displayed. The memory 11 stores design numerical values required for analysis for each tolerance analysis. Thereafter, in the first display step, the design numerical value read in the design numerical value reading step can be displayed.

(14) Preferably, the assembly design support method further includes an analysis result list display step.

(15) The assembly design support method preferably further includes an attribute display form change acceptance step and a display form change step. In this case, in the first display step, it is possible to display an attribute display form change key 162 or the like that can change the display form for each attribute. For each attribute, the memory 11 stores a display form of design numerical values related to the attribute in association with each other. Thereby, in the first display step, the numerical value for design changed by the display form changing step can be displayed.

(16) The assembly design support method preferably further includes an in-table information designation receiving step and a design numerical value display form changing step.

(17) The assembly design support method preferably further includes a one-side tolerance presence determination step and a one-side tolerance calculation step. As a result, in the second display step, the half value of the one-side tolerance can be displayed as plus or minus as the tolerance on the information input table 190 or the like (or the confirmation table 230).

  As long as each structural requirement of said (1)-(17) includes at least each structural requirement of (1), 1 or 2 or more of each structural requirement of (2)-(17) is arbitrarily combined. However, the case where combination is impossible is excluded.

5. Configuration of Improved Assembly Design Support Device FIG. 38 is a configuration diagram of a preferred embodiment of another assembly design support device according to the present invention.

  Each configuration shown in the assembly design support device 1 in FIG. 38 is mainly classified by function, and does not represent the exact hardware of the device.

  The assembly design support device 1 includes a central processing unit (CPU) 14 and a memory 11 and is a device for supporting design of an assembly. The memory 11 is preferably a hard disk drive (HDD), a solid state drive (SSD) using flash memory, a memory (EEPROM) that can erase or rewrite data by voltage operation, a readable / writable memory (RAM), or the like. It is formed by one type or two or more types of representative storage devices. Note that the unilaterally read information is preferably stored in a data read-only memory (ROM), which is an example of the memory 11, instead of the HDD, SSD, EEPROM, or RAM. The assembly design support apparatus 1 includes an input unit 10 represented by a keyboard, a touch panel, a pointing device, a voice input device, and the like. The assembly design support apparatus 1 includes a monitor 12 represented by a cathode ray tube (CRT), a liquid crystal display (LCD), a plasma display (PDP), an organic EL, and the like. For this reason, a user using the assembly design support apparatus 1 inputs necessary information, selects information, deletes information, changes information, or changes information through the input unit 10 while confirming information displayed on the monitor 12. You can send commands. The assembly design support apparatus 1 preferably reads a tolerance setting computer program 81 and a tolerance analysis computer program 82 recorded in an information recording medium 80 typified by a magnetic disk or an optical disk, and stores them in the memory 11. An information reading device 13 capable of storing each is provided. The assembly design support device 1 is preferably a computer, more preferably a personal computer (PC), but is not limited thereto.

  In this embodiment, the tolerance setting computer program 81 may be CAD (2D or 3D, but preferably 3D) or viewer itself, or CAD or viewer (hereinafter referred to as “CAD etc.”). A computer program that can expand functions such as CAD by adding in (also referred to as add-on) may be used. A more preferable tolerance setting computer program 81 is a computer program capable of expanding functions such as CAD. The tolerance setting computer program 81 is preferably a computer program that can be added into any CAD or the like when taking the form of a computer program capable of expanding the functions of CAD or the like. The tolerance analysis computer program 82 is a computer program for performing tolerance analysis. One of the features of the assembly design support apparatus 1 is that the tolerance setting computer program 81 and the tolerance analysis computer program 82 are linked to facilitate the design and the analysis of the tolerance, and the tolerance by the designer himself / herself. It is possible to support design including analysis. In FIG. 38, the components of the assembly design support device 1 of FIG. 1 are provided as they are, and the new configuration described below is also provided. For this reason, below, the description which overlapped with the above about the assembly design support apparatus 1 of FIG. 1 is abbreviate | omitted, and only each new structure is demonstrated.

  As shown in FIG. 38, the CPU 14 preferably has a functional setting method selection receiving unit 600, each point / direction selection receiving unit 601, a coordinate specifying unit 602, a ratio calculating unit 603, a coefficient receiving unit 604, a first lever. Ratio calculation unit 605, lever ratio attribute setting unit 606, variation factor reception unit 607, distance / angle reception unit 608, second lever ratio calculation unit 609, element reception unit 625, visualization instruction determination unit 626, visualization display unit 627, A non-display instruction determination unit 628 and a normal display unit 629 are provided.

  The setting method selection accepting unit 600 manually inputs, calculates from specific dimensions, or designates a predetermined part in a 3D model (or a 2D model) regarding various numerical value (coefficients) setting methods. It functions as a setting method selection accepting means for accepting selection of a setting method such as whether to calculate from a user. Each point / direction selection receiving unit 601 is one of the attributes, and is a fulcrum, a variation point and a measurement point as three types of points necessary for calculating a lever ratio positioned as a sensitivity to a dimensional tolerance, a measurement direction, It functions as point / direction selection accepting means for accepting each selection from the user. The coordinate specifying unit 602 functions as a coordinate specifying unit that specifies at least the coordinates of the three types of points received by each point / direction selection receiving unit 601. The ratio calculation unit 603 calculates a ratio obtained by dividing the first distance in the measurement direction between the fulcrum and the measurement point by the second distance between the fulcrum and the change point from each coordinate specified by the coordinate specifying unit. Functions as a ratio calculation means. The coefficient receiving unit 604 functions as a coefficient receiving unit that receives a coefficient necessary for obtaining the lever ratio from the user. The first lever ratio calculation unit 605 functions as a first lever ratio calculation unit that calculates a lever ratio using the ratio calculated by the ratio calculation unit 603 and the coefficient received by the coefficient reception unit 604.

  Each distance / angle receiving unit 608 is one of the attributes, and includes the second distance between the fulcrum and the change point necessary for calculating the lever ratio, which is positioned as the sensitivity to the dimensional tolerance, and the fulcrum and the measurement point. It functions as each distance / angle receiving means for receiving from the user the third distance between them and the angle connecting the measurement point via the fulcrum from the change point. The second lever ratio calculation unit 609 functions as a second lever ratio calculation unit that calculates a lever ratio using each numerical value received by each distance / angle reception unit 608 and a coefficient received by the coefficient reception unit 604. To do.

  The element receiving unit 625 functions as an element receiving unit that receives a plurality of elements at the analysis location. The visualization instruction determination unit 626 functions as a visualization instruction determination unit that determines whether an instruction to visualize the analysis location has been received from the user. The visualization display unit 627 functions as a visualization display unit that performs visualization display that makes an analysis point conspicuous when there is a visualization instruction as a result of the determination by the visualization instruction determination unit 626. The non-display instruction determination unit 628 functions as a non-display instruction determination unit that determines whether or not a non-display instruction for an analysis portion has been received. The normal display unit 629 functions as a normal display unit that performs processing for returning the visualization display state to the normal display state when a non-display instruction is received.

  The setting method selection receiving unit 600, each point / direction selection receiving unit 601, the coordinate specifying unit 602, the ratio calculating unit 603, the coefficient receiving unit 604, the first lever ratio calculating unit 605, the lever ratio attribute setting unit 606, the variation factor The reception unit 607, each distance / angle reception unit 608, the second lever ratio calculation unit 609, the element reception unit 625, the visualization instruction determination unit 626, the visualization display unit 627, the non-display instruction determination unit 628, and the normal display unit 629 It is good also as a 1 or 2 or more component part which remove | excluded one part or integrated those 2 or more.

  Hereinafter, the process of the assembly design support apparatus 1 including the processes of the components 600 to 629 will be described in detail with reference to FIGS. 39 to 47.

<5.1 First lever ratio automatic calculation function>
FIG. 39 shows the flow of each process of the first lever ratio automatic calculation function performed by the assembly design support device of FIG. FIG. 40 shows an image of the assembly displayed to the user when the first lever ratio automatic calculation function according to the flow of FIG. 39 is used. FIG. 41 shows input forms (41A, 41B) for the user to instruct or input when the first lever ratio automatic calculation function according to the flow of FIG. 39 is used.

  The first lever ratio automatic calculation function allows the user to specify the lever ratio (three points of the fulcrum of rotation, the changing point that can be changed depending on the height position of the pin, the measuring point to be measured, and the measuring direction. In other words, it means a function of automatically determining the influence of fluctuation of the pin height position on the measurement point.

  The confirmation table 670 in FIG. 41 (41A) is a different form of table similar to the confirmation table 230 exemplified in (21B). The confirmation table 670 is a book-type table including pages called “dimensions on the calculation formula”, pages called “holes / pins”, and pages called “geometric tolerances”. The geometric tolerance page is a page that allows entry and / or display of items 671, coefficients 672, dimensions 673, and tolerances 674. For example, when the coefficient 672a (part indicated by the arrow) of the item “k3” is designated, the coefficient setting table 400 of FIG. 41 (41B) is displayed. The coefficient setting table 400 is a table provided with an additional display on the coefficient setting table 400 of FIG. 20 (20B).

  The coefficient setting table 400 is similar to the coefficient setting table 400 of FIG. 20 (20B), in addition to “Manual input” and “Calculation from dimensions” radio buttons that can be instructed to select, “Support point, change point, measurement point, and Another radio button 680 which can be instructed to select is provided with “select measurement direction and calculate”. The coefficient setting table 400 includes a key 681 called “select fulcrum”, a key 682 called “select change point”, a key 683 called “select measurement point”, and a “measurement direction” below the radio button 680. A display area 685 for displaying the coordinates and direction of each point based on a user instruction from each key 681 to 684 is provided. Below the display area 685, there are display / selection columns 690 to 692 that form formulas relating to the lever ratio.

  When the user designates the key 681 and specifies the position of the fulcrum A650 on the 3D model of the assembly 180 displayed in FIG. 40, each of X, Y, and Z at the position immediately below the key 681 in the display area 685 is displayed. The coordinates are automatically displayed. Similarly, when the user designates the key 682 and designates the positions of the variation points B 185a and 185b on the 3D model of the assembly 180 displayed in FIG. 40, the X located immediately below the key 682 in the display area 685 is displayed. , Y and Z coordinates are automatically displayed. When the user designates the key 683 and designates the position of the measurement point C651 on the 3D model of the assembly 180 displayed in FIG. 40, the X, Y, and Each coordinate of Z is automatically displayed. In addition, the user points to the key 684 and the plane that defines the measurement and one of the Y direction 661 and the X direction 662 in the measurement direction 660 displayed in FIG. 40 (the plane that defines the measurement). Is selected on the XY plane), the plane defining the measurement and the Y direction or the X direction are automatically displayed immediately below the key 684 in the display area 685. When the coordinates of all the points and one direction are determined, the assembly design support device 1 displays the calculation result in the display / selection column 690. When the user selects “1” or “0.5” from the display / selection column 691, the assembly design support device 1 displays the lever ratio in the display / selection column 692.

  In this embodiment, the 3D model of FIG. 40 is displayed following the instruction of the key 681 on the coefficient setting table 400, and the coefficient setting table 400 is displayed following the instruction of the fulcrum A650 on the 3D model. . Hereinafter, similarly, the coefficient setting table 400 and the 3D model are alternately displayed. However, instead of such alternating display, both the 3D model screen and the coefficient setting table 400 may be displayed. As another example, after receiving all the instructions of the keys 681 to 684 from the coefficient setting table 400, the 3D model of FIG. 40 is displayed, and the fulcrum A650, the variation points B185a and 185b on the 3D model are measured. You may make it return to the display of the coefficient setting table 400 after a total of four instructions in any one of the point C651 and the directions 661 and 662 are completed.

  Next, processing of the assembly design support device 1 will be described along the flow of the first automatic lever ratio calculation function.

(1) Step S201 (first lever ratio automatic calculation selection acceptance step)
In this step, the assembly design support device 1 accepts selection of “fulcrum, change point, measurement point, and measurement direction” from the user, specifically, an instruction of the radio button 680 described above. This reception is performed by the setting method selection reception unit 600, for example.

(2) Step S202 (respective point / direction selection receiving step)
In this step, each point / direction selection receiving unit 601 defines instructions of the keys 681 to 684 from the user and the fulcrum A650, the variation points B185a and 185b, the measurement point C651, and the measurement on the 3D model of the assembly 180. A total of four instructions in any of the plane and directions 661 and 662 are accepted.

(3) Step S203 (coordinate specifying step)
In this step, the coordinate specifying unit 602 specifies the coordinates (x, y, z) of the fulcrum A650, the change points B185a and 185b, and the measurement point C651. When the assembly 180 is a 2D model, the coordinate specifying unit 602 specifies each coordinate (x, y).

(4) Steps S204 to S206 (Ratio calculation step)
In this step group, the ratio calculation unit 603 calculates the distance (P) between the fulcrum A650 and the variation points 185a and 185b (step S204), and the Y direction 661 (X direction) between the fulcrum A650 and the measurement point C651. 662 (which may be the case 662) is calculated (step S205) and Q / P is calculated (step S206).

(5) Step S207 (coefficient acceptance step)
This step is an optional step and may be omitted in other embodiments. In this embodiment, this step is provided because the user can select “1” or “0.5” from the display / selection column 691. When the user selects one of two or more options in the display / selection column 691, the coefficient receiving unit 604 receives the selection and specifies the selected coefficient.

(6) Step S208 (first lever ratio calculating step)
In this step, the first lever ratio calculation unit 605 displays the numerical value (= Q / P) displayed in the display / selection column 690 and the coefficient selected by the user (“1” or “0. 5 "to calculate the lever ratio, and display the lever ratio in the display / selection column 692.

  For example, the coordinates (x, y, z) of the fulcrum A650 are set to (11.1, 42.09, -2.3), and the coordinates (x, y, z) of the changing points B 185a, 185b are set to (-37, 40. 7, 0), the coordinates (x, y, z) of the measurement point C are (0, 33.9, -2), and the measurement direction is the Y direction 661. According to this example, the distance (P) is 48.117880836 and the distance (Q) is 11.1. Therefore, Q / P is 0.230683823. The coefficient 0.5 in the display / selection column 691 is used in the case of a loose component. The coefficient 1 is used except for the case of the loose component. If the user selects a factor of 0.5, the lever ratio is 0.1153419115. On the other hand, when the user selects the coefficient 1, the lever ratio becomes 0.2306683823.

  Each of the steps (1) to (6) may be one or two or more steps in which some of them are excluded or two or more of them are integrated.

<5.2 Second lever ratio automatic calculation function>
FIG. 42 shows a flow of each process of the second lever ratio automatic calculation function performed by the assembly design support device of FIG. FIG. 43 shows a 3D model of an assembly showing lever ratio attributes. FIG. 44 shows input forms (44A, 44B) for the user to instruct or input when the second lever ratio automatic calculation function according to the flow of FIG. 42 is used.

  In the second lever ratio automatic calculation function, the distance from the fulcrum to the variation point, the distance from the fulcrum to the measurement point, the straight line connecting the fulcrum and the variation point, and the fulcrum to the measurement point are connected as the lever ratio attribute. This means that the lever ratio can be obtained automatically by setting the angle formed with a straight line.

  The confirmation table 670 in FIG. 44 (44A) is in common with the confirmation table 670 exemplified in (41A). For example, when the coefficient 672a (part indicated by an arrow) of the item “k3” on the confirmation table 670 is designated, the coefficient setting table 400 of FIG. 44 (44B) is displayed. This coefficient setting table 400 is a table provided with an additional display on the coefficient setting table 400 of FIG. 41 (41B).

  The coefficient setting table 400 includes an input part and a display part similar to the coefficient setting table 400 of FIG. 41 (41B), and includes “manual input”, “calculation from dimensions”, “fulcrum, variation point, measurement point, and measurement”. In addition to the radio button “Select a direction and calculate”, another radio button 690 that can be instructed to select “Angle calculation” is provided. The coefficient setting table 400 includes a display portion of a calculation formula 710 including selection / input fields 711 to 714 and display / selection fields 715 and 716 below the radio button 690.

  When the lever ratio is calculated using the second lever ratio automatic calculation function, the user previously determines the distance between the fulcrum A650 and the variation points B185a and 185b and the distance between the fulcrum A650 and the measurement point C651. It is preferable to set an angle (角度 BAC) composed of a straight line connecting the fulcrum A650 and the variation points B185a and 185b and a straight line connecting the fulcrum A650 and the measurement point C651. The user selects the radio button 700, and then selects a predetermined numerical value from numerical values (numerical values set in advance by the user) selected and displayed in the selection / input fields 711 and 712. “sin”, “cos” or “tan” is selected, a predetermined angle (∠BAC) is selected or input from the display / selection column 714, and finally, a plurality of selections / input fields 715 are selected and displayed. Select one from the coefficients. As a result, the lever ratio calculated based on the calculation formula 710 is displayed in the display / selection column 716.

  Unlike the first lever ratio automatic calculation function, the second lever ratio automatic calculation function sets the distance and angle necessary for calculating the lever ratio in advance, instead of having to indicate each position on the 3D model. There is a need. Further, the second lever ratio automatic calculation function can also be applied to tolerance calculation when angle tolerance is set.

  Next, processing of the assembly design support device 1 will be described along the flow of the second lever ratio automatic calculation function.

(7) Step S301 (Lever Ratio Attribute Setting Step)
In this step, the lever ratio attribute setting unit 606 of the assembly design support device 1 sets the distance between the fulcrum A650 and the variation points B185a and 185b, and the fulcrum A650 and the measurement point C651 as the lever ratio attribute. An input of distance and an angle (∠BAC) composed of a straight line connecting the fulcrum A650 and the variation points B 185a and 185b and a straight line connecting the fulcrum A650 and the measurement point C651 is received from the user and registered.

(8) Step S302 (fluctuation factor reception step)
In this step, the variation factor accepting unit 607 of the assembly design support apparatus 1 accepts an instruction of the coefficient 672a of a predetermined item on the geometric tolerance page. As a result, the coefficient setting table 400 is displayed.

(9) Step S303 (Angle calculation selection acceptance step)
In this step, the angle calculation selection accepting unit accepts selection of the radio button 700 from the user. As a result, the selection / input fields 711 to 714 and the display / selection fields 715 and 716 are in an active state that can be displayed, selected, or input.

(10) Steps S304 to S306 (each distance / angle receiving step)
In this step group, each distance / angle receiving unit 608 selects from the numerical values registered as attributes of the lever ratio (in this example, the distance between the fulcrum A650 and the variation points B185a and 185b, the fulcrum A650, and the measurement. Acceptance (distance to point C651) (step S304), selection from sin, cos or tan (in this example, sin is selected) (step S305), angle registered as an attribute of the lever ratio (this In the example, reception of selection of an angle (ＡＣBAC) composed of a straight line connecting the fulcrum A650 and the variation points B 185a and 185b and a straight line connecting the fulcrum A650 and the measurement point C651 (step S306) is executed.

(11) Step S307 (coefficient acceptance step)
This step is an optional step and may be omitted in other embodiments. In this embodiment, this step is provided because the user can select “1” or “0.5” from the display / selection column 715. When the user selects one of two or more options in the display / selection field 715, the coefficient receiving unit 604 receives the selection and specifies the selected coefficient.

(12) Step S208 (second lever ratio calculating step)
In this step, the second lever ratio calculation unit 609 displays a predetermined numerical value selected from the selection / input field 711, 712, “sin”, “cos”, or “tan” selected from the selection / input field 713, display The lever ratio is calculated based on a predetermined angle (∠BAC) selected from the selection column 714 and one of a plurality of coefficients selected and displayed in the selection / input column 715, and the lever is displayed in the display / selection column 716. Display the ratio.

  Each of the above steps (7) to (12) may be one or two or more steps obtained by excluding some of them or integrating two or more of them.

<5.3 Analysis location display function>
FIG. 45 shows a flow of the analysis location display function. FIG. 46 shows an example of a screen instructed by the user when performing FIG. FIG. 47 shows a screen example (47A) in a state in which an analysis location is displayed and a diagram (47B) for explaining a situation of switching between display and non-display alternately.

  The analysis location display function is a function that makes it easy to visually recognize which analysis is being performed in the tolerance analysis. In this embodiment, a plane is created at the analysis location and highlighted.

  Hereinafter, the analysis location display function will be described in detail with reference to FIGS.

(1) Step S801 (Analysis Location Multiple Element Reception Step)
The element receiving unit 625 of the assembly design support apparatus 1 receives a plurality of elements at the analysis location from the 3D model of the assembly 180 from the user. Here, the plural elements mean, for example, the points, edges, and planes of parts related to the analysis such as the parts 183 and 184.

(2) Step S802 (visualization instruction determination step)
Next, the visualization instruction determination unit 626 of the assembly design support apparatus 1 determines whether or not there is an instruction to visualize the analysis location from the user. Specifically, it is determined whether or not there is an instruction by clicking the key 820 named “visualization of analysis location” displayed in the file 150 of FIG. 46 (see the arrow in FIG. 47 (47A)). . If there is no instruction as a result of the determination, the process does not proceed to the next step. On the other hand, if there is an instruction, the process proceeds to the next step.

(3) Step S803 (Visualization display step)
In the case of YES in step S802, the visualization display unit 627 of the assembly design support device 1 performs visualization display that makes the received analysis location (a plurality of elements) stand out, as illustrated in FIG. 47 (47A). In this embodiment, a plane 831 and a plane 832 are displayed immediately below the component 183 and directly above the component 184, respectively.

(4) Step S804 (non-display instruction determination step)
Next, the non-display instruction determination unit 628 of the assembly design support apparatus 1 determines whether an instruction to hide the analysis location has been received. As a result, if no non-display instruction is accepted, the assembly design support device 1 does not perform any processing. On the other hand, when a non-display instruction is received, the assembly design support device 1 proceeds to the next step.

(5) Step S805 (normal display step)
In the case of YES in step S804, the normal display unit 629 of the assembly design support device 1 performs processing for returning the visualization display state to the normal display state. After this processing, the process returns to step S802, and it is determined again whether or not an instruction to display the analysis portion has been accepted. There are no particular restrictions on the method of switching between the visualization display and the normal display, but for example, a method of switching alternately according to an instruction from the same key called key 821 named “display / non-display of analysis location” in FIG. 46 is preferable. However, the visualization display and the normal display may be executed by instructions of different keys.

  Each of the steps (1) to (5) may be one or two or more steps in which some of them are excluded or two or more of them are integrated.

  The present invention can be used, for example, for tolerance analysis of assemblies.

1: assembly design support device (computer), 11: memory, 14: CPU (central processing unit), 21: first display unit (first display means), 22: design numerical value selection receiving unit (design numerical value selection) Receiving means), 23: attribute key selection receiving section (attribute key selection receiving means), 24: information input table display section (second display means), 25: confirmation table display section (second display means), 26: information book Insertion instruction section (information writing instruction means), 27: tolerance analysis table display section (third display means), 28: ID assignment section (ID assignment means), 29: address assignment section (address assignment means), 30: dimensions Tolerance presence / absence discriminating section (dimension tolerance presence / absence discriminating means), 31: Display tolerance priority section (display tolerance priority means), 32: First standard tolerance reading section (first standard tolerance reading means), 33: Standard tolerance level selection receiving section (Standard tolerance level selection Appending means), 34: Second standard tolerance reading section (second standard tolerance reading means), 35: Hole / pin diameter dimensional difference calculating section (hole / pin diameter dimensional difference calculating means), 36: Coefficient calculation formula creating section ( 37: geometric tolerance half-value calculation unit (geometric tolerance half-value calculation unit), 38: contribution rate setting / calculation unit (contribution rate setting / calculation unit), 39: contribution rate-dependent tolerance calculation unit (contribution rate) Dependency tolerance calculation means), 40: contribution rate selection reception unit (contribution rate selection reception means), 41: calculation object exclusion instruction reception part (calculation object exclusion instruction reception means), 42: tolerance fixing part (tolerance fixation means), 43 : Information input / change receiving unit (information input / change receiving unit), 44: tolerance analysis selection key receiving unit (tolerance analysis selection key receiving unit), 45: design numerical value reading unit (design numerical value reading unit), 46: Analysis result comparison display section (analysis result comparison display means), 7: Attribute display form change accepting unit (attribute display form change key accepting means), 48: Display form changing part (display form changing means), 49: In-table information designation accepting part (in-table information designation accepting means), 50: Numerical value display form change unit for design (numerical value display form change means for design), 51: One-side tolerance presence / absence determination part (one-side tolerance presence / absence determination means), 52: One-side tolerance calculation part (one-side tolerance calculation means), 69: Information update display Part (information update display means), 81: computer program for tolerance setting, 82: computer program for tolerance analysis, 152-155: attribute key, 162-165: attribute display key (attribute display form change key), 170: analysis selection Key (tolerance analysis selection key), 171: window area (tolerance analysis selection key), 180: assembly, 190, 200, 210, 220: information input table Bull (pre-analysis table), 230: confirmation table (pre-analysis table), 300: tolerance analysis table, 311, 312: key (contribution rate selection key), 601: each point / direction selection accepting unit (each point / direction selection) Receiving unit), 602: coordinate specifying unit (coordinate specifying unit), 603: ratio calculating unit (ratio calculating unit), 604: coefficient receiving unit (coefficient receiving unit), 605: first lever ratio calculating unit (first lever ratio) 608: each distance / angle receiving unit (each distance / angle receiving unit), 609: second lever ratio calculating unit (second lever ratio calculating unit), 625: element receiving unit (element receiving unit), 626 : Visualization instruction determination unit (visualization instruction determination unit), 627: Visualization display unit (visualization display unit).

Claims (39)

An assembly design support device for supporting the design of an assembly, comprising a central processing unit and a memory,
The design numerical value is commonly used in the analysis of the tolerance of at least one of the numerical value indicating the form of the parts constituting the assembly and the numerical value indicating the distance between the parts, and the numerical value for the design. An attribute key for instructing to collect information related to the design numerical value for each attribute to be displayed;
Design numerical value selection receiving means for receiving selection of the design numerical value;
Attribute key selection accepting means for accepting selection of the attribute key;
For each attribute received by the attribute key selection receiving means, information related to the design numerical value received by the design numerical value selection receiving means is displayed in a pre-analysis table displayed before tolerance analysis. Second display means for;
Information writing instruction means for instructing to write information related to the numerical value for design together for each attribute in a tolerance analysis table for analyzing the tolerance;
Third display means for displaying information related to the design numerical value in the tolerance analysis table according to the information writing instruction means;
An assembly design support device.   The assembly design support apparatus according to claim 1, further comprising an ID assigning unit that assigns an ID specific to the attribute to the information related to the design numerical value. An address assigning means for assigning an address to the information related to the design numerical value;
The assembly design support device according to claim 1, wherein the information writing instruction unit instructs to write information related to the design numerical value at a location corresponding to the address. Dimensional tolerance presence / absence determining means for determining whether or not a dimensional tolerance is included in the design numerical value displayed by the first display means;
When it is determined by the dimensional tolerance presence / absence determining means that the dimensional tolerance is included, a display tolerance priority means for preferentially acquiring the dimensional tolerance;
When it is determined that the dimensional tolerance is not included by the dimensional tolerance presence / absence determining unit, a first standard tolerance reading unit that reads and acquires a predetermined standard tolerance from the memory;
With
4. The display device according to claim 1, wherein the second display unit displays the dimensional tolerance acquired by the display tolerance priority unit or the standard tolerance acquired by the first standard tolerance reading unit on the pre-analysis table. The assembly design support device according to claim 1. The second display means is a means for displaying a plurality of options for a predetermined standard tolerance for each level, and the memory is a means for storing a plurality of types of the standard tolerance for each level,
A standard tolerance level selection accepting means for accepting a selection from the options;
Second standard tolerance reading means for reading out the standard tolerance of the level received by the standard tolerance level selection receiving means from the memory;
Further comprising
5. The assembly design support device according to claim 1, wherein the second display unit displays the standard tolerance read by the second standard tolerance reading unit. 6. The attribute includes a combination of a diameter of a hole in the assembly and a diameter of a pin inserted into the hole,
Based on the diameter of the hole and the diameter of the pin, a hole / pin diameter dimensional difference that calculates a dimensional difference between a median value of the hole diameter within the tolerance range and a median value of the pin diameter within the tolerance range A calculation means,
The assembly design support apparatus according to claim 1, wherein the second display unit or the third display unit displays the dimensional difference. The attributes include a lever ratio that is positioned as a sensitivity to dimensional tolerances;
Coefficient calculation formula creating means for creating a coefficient calculation formula capable of setting a coefficient used for the analysis of the tolerance based on the lever ratio is further provided,
The assembly design support apparatus according to any one of claims 1 to 6, wherein the second display means displays in the pre-analysis table such that the automatic setting of the coefficient using the coefficient calculation formula can be selected. The attribute includes a geometric tolerance that is positioned as a range of allowable deviation from an ideal shape, posture or position of the part;
A geometric tolerance half-value calculating means for calculating a half-value of the geometric tolerance displayed by the first display means;
The assembly design support apparatus according to any one of claims 1 to 7, wherein the second display means or the third display means displays the half value of the geometric tolerance in plus and minus. A contribution rate setting / calculation means for setting or calculating a contribution rate obtained by quantifying a ratio that contributes to the overall tolerance for each tolerance of the component that affects the overall tolerance of the assembly;
Contribution rate dependent tolerance calculation means for calculating the tolerance displayed in the tolerance analysis table in dependence on the contribution rate;
The assembly design support apparatus according to any one of claims 1 to 8, further comprising: The tolerance analysis table displays a contribution rate selection key that causes the tolerance to be calculated based on one of two or more contribution rates.
Contribution rate selection accepting means for accepting selection of one of the two or more contribution rate selection keys;
The assembly design support apparatus according to claim 9, wherein the contribution rate dependent tolerance calculation unit performs calculation based on a selection from the contribution rate selection key. A calculation target exclusion instruction receiving means for receiving an instruction to exclude one or more of the tolerances from the target of the contribution-dependent tolerance calculation means;
Tolerance fixing means for fixing the tolerance received from the calculation object exclusion instruction receiving means;
Further comprising
11. The assembly design according to claim 9, wherein the contribution rate dependent tolerance calculating unit calculates the tolerance depending on the contribution rate for the other tolerances except the tolerance fixed by the tolerance fixing unit. Support device. Information input / change accepting means for accepting input of information to the tolerance analysis table or change of already inputted information;
Information update display means for displaying the information received by the information input / change receiving means instead of the original information;
The assembly design support device according to any one of claims 1 to 11, further comprising: The first display means can display a tolerance analysis selection key that can be selected for each analysis of the tolerance,
The memory stores the design numerical values necessary for analysis for each analysis of the tolerance,
Tolerance analysis selection key receiving means for receiving selection of one of the tolerance analysis selection keys;
Design numerical value reading means for reading the design numerical values corresponding to the analysis of the tolerance received by the tolerance analysis selection key receiving means from the memory;
Further comprising
13. The assembly design support apparatus according to claim 1, wherein the first display unit displays the design numerical value read by the design numerical value reading unit.   The assembly design support apparatus according to any one of claims 1 to 13, further comprising analysis result comparison display means for comparing and displaying each analysis result for each analysis of the tolerance. The first display means can display an attribute display form change key capable of changing a display form for each attribute,
The memory stores, in association with each attribute, a display form of the design numerical value related to the attribute,
Attribute display form change key accepting means for accepting selection of one of the attribute display form change keys;
The information in the memory is accessed to change the display form of the numerical value for design related to the attribute received by the attribute display form change key receiving means to the display form of the numerical value for design related to another attribute. Display form changing means;
Further comprising
15. The assembly design support apparatus according to claim 1, wherein the first display unit displays the design numerical value changed by the display form changing unit. In-table information designation accepting means for accepting designation of information in the tolerance analysis table or in the pre-analysis table;
Design value that is information that matches the information received by the in-table information designation receiving means, and that displays the design numerical value displayed by the first display means in place of the other design numerical values. Display form changing means;
The assembly design support apparatus according to claim 1, further comprising: One-side tolerance presence / absence judging means for judging whether or not one-side tolerance is included in the design numerical value;
When the one-side tolerance is included, a one-side tolerance calculation means for obtaining a half value of the one-side tolerance, and
The assembly design support device according to any one of claims 1 to 16, wherein the second display unit or the third display unit displays the half value of the one-sided tolerance as plus and minus as the tolerance. A tolerance setting that is installed in a computer having a central processing unit and a memory, and that can set a tolerance of a numerical value for design of at least one of a numerical value representing the form of a part constituting the assembly and a numerical value representing a distance between the parts. A computer program for
The computer,
A first display that displays the design value and an attribute key for instructing to collect information related to the design value for each attribute that shares the positioning of the design value in the tolerance analysis means;
Design numerical value selection receiving means for receiving selection of the numerical values for design;
Attribute key selection receiving means for receiving selection of the attribute key;
For each attribute received by the attribute key selection receiving means, information related to the design numerical value received by the design numerical value selection receiving means is displayed in a pre-analysis table displayed before tolerance analysis. Second display means for performing; and information writing instruction means for instructing to write information related to the design numerical values collectively for each attribute in a tolerance analysis table for analyzing the tolerance;
Tolerance setting computer program to function as The computer,
The tolerance setting computer program according to claim 18, further causing the information relating to the design numerical value to function as an ID assigning unit that assigns an ID unique to the attribute. The computer,
It further functions as an address giving means for giving an address to information related to the design numerical value,
20. The tolerance setting computer program according to claim 18 or 19, wherein the information writing instruction means instructs to write information related to the design numerical value at a location corresponding to the address. The computer,
Dimensional tolerance presence / absence determining means for determining whether or not a dimensional tolerance is included in the numerical value for design displayed by the first display means;
When it is determined that the dimensional tolerance is included by the dimensional tolerance presence / absence determining unit, a display tolerance priority unit that obtains the dimensional tolerance with priority, and the dimensional tolerance is included by the dimensional tolerance presence / absence determining unit. If it is determined that it is not, it is further operated as a first standard tolerance reading means for reading out and acquiring a predetermined standard tolerance from the memory,
21. The second display means displays the dimensional tolerance acquired with priority by the display tolerance priority means or the standard tolerance acquired by the first standard tolerance reading means on the pre-analysis table. Tolerance setting computer program. The second display means is a means for displaying a plurality of options for a predetermined standard tolerance for each level, and the memory is a means for storing a plurality of types of the standard tolerance for each level,
The computer,
A standard tolerance level selection accepting means for accepting a selection from the options; and a second standard tolerance reading means for reading out the standard tolerance at a level accepted by the standard tolerance level selection accepting means from the memory;
The tolerance setting computer program according to any one of claims 19 to 21, wherein the second display means displays the standard tolerance read by the second standard tolerance reading means. The attribute includes a combination of a diameter of a hole in the assembly and a diameter of a pin inserted into the hole,
The computer,
Based on the diameter of the hole and the diameter of the pin, a hole / pin diameter dimensional difference that calculates a dimensional difference between a median value of the hole diameter within the tolerance range and a median value of the pin diameter within the tolerance range Let it work as a calculation tool,
The tolerance setting computer program according to any one of claims 19 to 22, wherein the second display means displays the dimensional difference. The attributes include a lever ratio that is positioned as a sensitivity to dimensional tolerances;
The computer,
As a coefficient calculation formula creating means for creating a coefficient calculation formula that allows setting of the coefficient used for the analysis of the tolerance based on the lever ratio,
The tolerance setting computer program according to any one of claims 19 to 23, wherein the second display means displays the automatic setting of the coefficient using the coefficient calculation formula in the pre-analysis table in a selectable manner. The attribute includes a geometric tolerance that is positioned as a range of allowable deviation from an ideal shape, posture or position of the part;
The computer,
Further function as a geometric tolerance half-value calculating means for calculating a half value of the geometric tolerance displayed by the first display means,
The tolerance setting computer program according to any one of claims 19 to 24, wherein the second display means displays the half value of the geometric tolerance as plus and minus. The first display means can display a tolerance analysis selection key that can be selected for each analysis of the tolerance,
The computer,
Tolerance analysis selection key receiving means for receiving selection of one of the tolerance analysis selection keys, and design numerical value reading for reading out the design numerical values corresponding to the tolerance analysis received by the tolerance analysis selection key receiving means from the memory Further function as a means,
26. The tolerance setting computer program according to claim 19, wherein the first display means displays the design numerical value read by the design numerical value reading means. The first display means can display an attribute display form change key capable of changing a display form for each attribute,
The memory stores, in association with each attribute, a display form of the design numerical value related to the attribute,
The computer,
Attribute display form change key receiving means for receiving one selection of the attribute display form change key, and the design related to the attribute received by the attribute display form change key receiving means by accessing the information in the memory Further functioning as a display form changing means for changing the display form of numerical values to the display form of the numerical values for design related to other attributes,
27. The tolerance setting computer program according to claim 19, wherein the first display means displays the design numerical value changed by the display form changing means. The computer,
In-table information designation accepting means for accepting designation of information in the pre-analysis table; and information that matches the information accepted by the in-table information designation accepting means, the information displayed by the first display means The tolerance setting computer program according to any one of claims 19 to 27, further causing the design numerical value display form changing means to display the numerical value for design different from the other numerical values for design. The computer,
A one-side tolerance presence / absence judging means for judging whether or not a single-side tolerance is included in the design numerical value, and a one-side tolerance calculating means for obtaining a half value of the one-side tolerance when the one-side tolerance is included. ,
The tolerance setting computer program according to any one of claims 19 to 28, wherein the second display means displays the half value of the one-sided tolerance as plus and minus as the tolerance. A tolerance setting that is installed in a computer having a central processing unit and a memory, and that can set a tolerance of a numerical value for design of at least one of a numerical value representing the form of a part constituting the assembly and a numerical value representing a distance between the parts. A tolerance analysis computer program capable of analyzing the tolerances in conjunction with a computer program,
The tolerance setting computer program is:
The computer,
A first display that displays the design value and an attribute key for instructing to collect information related to the design value for each attribute that shares the positioning of the design value in the tolerance analysis means;
Design numerical value selection receiving means for receiving selection of the numerical values for design;
Attribute key selection receiving means for receiving selection of the attribute key;
For each attribute received by the attribute key selection receiving means, information related to the design numerical value received by the design numerical value selection receiving means is displayed in a pre-analysis table displayed before tolerance analysis. Second display means for performing; and information writing instruction means for instructing to write information related to the design numerical values together for each attribute in a tolerance analysis table for analyzing the tolerance;
A computer program that functions as
The computer,
A tolerance analysis computer program for causing the tolerance analysis table to function as third display means for displaying information related to the design numerical value in accordance with the information writing instruction means. The computer,
A contribution ratio setting / calculation means for setting or calculating a contribution ratio obtained by quantifying a ratio contributing to the total tolerance for each tolerance of the part that affects the overall tolerance of the assembly, and displayed on the tolerance analysis table Contribution rate dependent tolerance calculating means for calculating the tolerance to be made dependent on the contribution rate,
The computer program for tolerance analysis according to claim 30, further functioning as: The tolerance analysis table displays a contribution rate selection key that causes a tolerance to be calculated based on one of two or more contribution rates.
The computer,
Further functioning as contribution rate selection accepting means for accepting selection of one of the two or more contribution rate selection keys,
32. The computer program for tolerance analysis according to claim 31, wherein the contribution rate dependent tolerance calculating means performs calculation based on selection from the contribution rate selection key. The computer,
Calculation target exclusion instruction receiving means for receiving an instruction to exclude one or more of the tolerances from the target of the contribution rate dependent tolerance calculating means, and tolerance fixing means for fixing the tolerance received from the calculation target exclusion instruction receiving means Further function as
33. The tolerance analysis unit according to claim 31 or 32, wherein the contribution rate-dependent tolerance calculating unit calculates the tolerance depending on the contribution rate for the other tolerances except the tolerance fixed by the tolerance fixing unit. Computer program. The computer,
Information input / change accepting means for accepting input of information to the tolerance analysis table or change of information already inputted, and information for displaying the information accepted by the information input / change accepting means instead of the original information The computer program for tolerance analysis according to any one of claims 30 to 33, which further functions as an update display means. The computer,
35. The computer program for tolerance analysis according to any one of claims 30 to 34, further functioning as analysis result comparison display means for comparing and displaying each analysis result for each analysis of the tolerance. An assembly design support method which is an apparatus including a central processing unit and a memory and which is performed using an assembly design support apparatus for supporting design of an assembly,
The design numerical value is commonly used in the analysis of the tolerance of at least one of the numerical value indicating the form of the parts constituting the assembly and the numerical value indicating the distance between the parts, and the numerical value for the design. An attribute key for instructing to collect information related to the design numerical value for each attribute to be displayed;
A design numerical value selection receiving step for receiving selection of the design numerical value;
An attribute key selection receiving step for receiving selection of the attribute key;
For each attribute received in the attribute key selection reception step, information related to the design numerical value received in the design numerical value selection reception step is displayed in a pre-analysis table displayed before tolerance analysis. A second display step of;
An information writing instruction step for instructing to write information related to the numerical values for design together for each of the attributes in a tolerance analysis table for analyzing the tolerance;
A third display step of displaying information related to the design numerical value on the tolerance analysis table after the information writing instruction step;
Assembly design support method. The attributes include a lever ratio that is positioned as a sensitivity to dimensional tolerances;
Each point / direction selection receiving means for receiving a selection of a fulcrum, a variation point, a measurement point, and a measurement direction as three types of points necessary for calculating the lever ratio from the user,
Coordinate specifying means for specifying at least the coordinates of the three types of points received by the respective point / direction selection receiving means;
From each coordinate specified by the coordinate specifying means, a ratio is calculated by dividing the first distance in the measurement direction between the fulcrum and the measurement point by the second distance between the fulcrum and the variation point. A ratio calculating means for
Coefficient receiving means for receiving a coefficient required for obtaining the lever ratio from a user;
First lever ratio calculating means for calculating the lever ratio using the ratio calculated by the ratio calculating means and the coefficient received by the coefficient receiving means;
The assembly design support apparatus according to any one of claims 1 to 6, further comprising: The attributes include a lever ratio that is positioned as a sensitivity to dimensional tolerances;
A second distance between a fulcrum and a variation point necessary for calculating the lever ratio, a third distance between the fulcrum and the measurement point, and an angle connecting the measurement point from the variation point through the fulcrum. Each distance and angle receiving means for receiving from the user,
Coefficient receiving means for receiving a coefficient required for obtaining the lever ratio from a user;
Second lever ratio calculating means for calculating the lever ratio using each numerical value received by each distance / angle receiving means and the coefficient received by the coefficient receiving means;
The assembly design support apparatus according to any one of claims 1 to 6, further comprising: Element accepting means for accepting a plurality of elements in the analysis location;
Visualization instruction determination means for determining whether or not an instruction for visualization of the analysis location has been received from a user;
As a result of the visualization instruction discriminating means, a visualization display means for performing visualization display that makes the analysis portion stand out when there is a visualization instruction;
The assembly design support apparatus according to any one of claims 1 to 6, further comprising: