JP4756982B2 - Part design support method, part design support system, and part design support program - Google Patents

Description

  The present invention relates to a part design support method, a part design support system, and a part design support program. More specifically, the present invention relates to a part design support method, a part design support system capable of supporting the design of various members such as sheet metal parts, and the like. It relates to a part design support program.

  Conventionally, a three-dimensional CAD (Computer-Aided Design) system has been developed as a tool for creating a shape on a screen, and has been used as a tool for virtually realizing a curved surface having a complicated shape.

  3D CAD has been developed with the demand for a function of creating a shape based on such background. In recent years, inexpensive middle-range three-dimensional CAD has appeared, and as a substitute for the conventional two-dimensional CAD, only the shape creation function is limited as an attribute stored in association with the three-dimensional shape. It has come to have a function for editing shape attributes such as, and a function for editing non-shape attributes such as articles.

  On the other hand, as a concurrent design movement, there is a movement to reflect the manufacturing requirements related to mass productivity on the model shape and dimensions from the initial stage of the design.

  In other words, the system determines the ease and validity of manufacturing by checking the design criteria (design rules) stored in advance, manufacturing know-how, etc. to see if there are any manufacturing problems, and improvements are desired. In some cases, a design support system that displays a target location on a display device is known (see, for example, Patent Document 1).

JP 2001-236373 A

  However, in such a conventional design support system, even if it goes out of manufacturing constraints, only the target location is displayed on the display device, and the countermeasures have to rely on the experience and knowledge of the designer. Therefore, in the case of an inexperienced designer, even if the target portion is displayed, there are cases where sufficient countermeasures cannot be taken.

  Or, if you decide to consult with the production department or production cooperating company to consider the countermeasures, you may not be able to take appropriate countermeasures because you may be concerned about the accuracy in order to rely on the information provided by people. In some cases, quick measures could not be taken, resulting in a design change after being sent to the production department and causing delays in the schedule.

In order to solve the above-mentioned problem, the part design support method of the present invention is a part design support method applied to 3D CAD, wherein the comparison means makes a feature shape created by determining a numerical parameter of a registered feature shape. relative, size constraints acceptable manufacturing constraints produced acceptable disposed a distance between the individual features the shape of the feature shapes group, and manufacturing tolerance between the individual features form a part model A comparison between the arrangement distance constraint and the feature shape created by the user, and the display means, as a result of the comparison, the feature shape created by the user does not conform to the manufacturing constraint If, while differentiating display device to display the target location, size and arrangement of features shapes that the user created A step of presenting the improvement idea groups for distance correction, acquisition unit, a step of acquiring a numerical parameters the registered corresponding to the proposed improvements selected by the user from the counter scheme groups, change means, said user There modified based the size and arrangement distance of the feature shape created numerical parameters the acquired or the step of changing the component model by adding new features shape made based on the obtained numerical parameters, to have a Features.

  According to the present invention, the part design support system can perform shape comparison and deform the shape in accordance with the shape of the improvement plan. Therefore, it is possible to avoid in advance oversight and mistakes due to relying on the memory of the operator.

  In addition, according to the present invention, concurrent design is possible, and even inexperienced designers can incorporate manufacturing know-how into the concurrent design stage. Thus, it is possible to connect the produced drawings and models (only the 3D drawing model in the case of drawing-free) without changing the design in the subsequent process.

  In addition, according to the present invention, a manufacturing constraint (a standard that defines a constraint on an arrangement distance such as a hole size, a cutting position, a bending position, etc.) is compared with a 3D model shape, and if there is a problem, a candidate for avoidance processing content And the 3D model information is changed according to the standard defined according to the selected processing content, so that a desired design change can be reflected without performing a complicated operation.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In addition, this invention is not limited to the Example demonstrated below, It cannot be overemphasized that it can change and combine suitably in the range of the main point of this invention. In the embodiment of the present invention, the case of a sheet metal part is described, but the same applies to a molded part, a die-cast part, a cutting part and the like. That is, the target 3D model is the same regardless of whether it is a molded part, a die-cast part, a cutting part, or the like, and is included as long as it does not depart from the gist of the present invention.

(First embodiment)
FIG. 1 is a block diagram showing the whole part design support system according to an embodiment of the present invention. In FIG. 1, reference numeral 101 denotes a server, which provides database information requested via a network. Reference numeral 102 denotes a feature (feature shape) DB (database) in which various feature shapes such as holes, burring, embossing, drawing shapes, bosses (projections), ribs, chamfering, rounding (fillets), etc. are pre-registered. . This makes it possible to improve efficiency by omitting the modeling work by using the feature shape when creating the 3D model.

  For example, when designing a drawing shape, modeling work can be made more efficient by registering bell bell embossing, general embossing, half punching embossing, etc. in the system for each material and plate thickness. Similarly, as a hole shape, φ2 round hole, φ3 round hole, square hole, various irregular holes, etc. are registered in the system according to material and plate thickness.

  Regarding the bend line of the bending portion and the outline of the outer shape, the system is configured so that the system can automatically recognize these feature shape elements. Further, in each feature shape element, it is clarified whether or not R is included as a design shape for a small R (curvature) attached to a forming portion or a base of the processing portion at the time of forming or processing a sheet metal or the like.

  Reference numeral 103 denotes a manufacturing constraint DB (database), which is a database of manufacturing constraints taking mass productivity into consideration, and presents manufacturing constraints via a server in response to a request from a CAD terminal. It is. Of course, this constraint may be a predetermined standard, and even if the constraint is such that it is impossible to manufacture if this condition is not met, it can be manufactured but the accuracy is not sufficient. It may be a restriction such as a reference or a reference as a mere index. This reference may be held in the database as a desired relational expression, or may be held as a specific numerical value.

  Reference numeral 104 denotes an improvement plan DB (database) when the manufacturing constraints (relational expressions, etc.) are not met.

  Reference numeral 105 denotes a parameter DB (database) for improvement plan feature shapes and arrangement distances, which is a database of shape parameters corresponding to each improvement plan in the DB 104 for improvement plan. This is for presenting the shape parameters corresponding to the individual improvement proposals via 101.

  Reference numerals 107 and 108 denote CAD terminals for creating a 3D model in a three-dimensional coordinate space displayed on the display device, and are connected to the various DBs (databases) on the network via a server. .

  FIG. 2 is a block diagram showing in detail each CAD terminal in the component design support system according to the embodiment of the present invention, which is indicated by 1077 or 108 in FIG. In FIG. 2, reference numeral 200 denotes a CPU, which executes processing in accordance with CAD program instructions. A shape creation unit 201 includes a later-described three-dimensional shape editing function unit 202 and a shape attribute editing function unit 203 such as dimensions, and is used to create a shape on the display device. A three-dimensional shape editing function unit 202 is a function unit for editing the shape on the display device. Reference numeral 203 denotes a shape attribute editing function unit, which is a function unit for editing attributes related to the shape such as dimensions.

  Reference numeral 204 denotes an out-of-shape attribute creating unit, which includes a range editing function unit 205 and an out-of-shape attribute editing function unit 206, and creates range designation information and article information that are related to the shape created on the display device and are independent of the shape. Is to do. A range editing function unit 205 is a function unit for designating an arbitrary range of the shape created on the display device and editing the surface treatment range and the like. Reference numeral 206 denotes an out-of-shape attribute editing function unit, which is a function unit for editing surface processing instruction information for the range designated by the range editing function unit 205 and article information.

  Reference numeral 224 denotes an external connection device for connecting the CPU 200 and an external device, supplying data from the device to the external device, and controlling the CPU 200 from an external device. The feature shape DB 102, the manufacturing constraint DB 103, and the improvement plan DB 104 are connected to the network.

  Reference numeral 211 denotes a shape comparison / confirmation function unit, which is a function unit for performing shape comparison and shape confirmation on a model on the display device based on information from the manufacturing constraint DB 103 on the network.

  212 is a three-dimensional shape automatic generation unit, and an improvement plan corresponding to the improvement plan selected from the improvement plan group displayed on the display device based on the manufacturing constraints from the manufacturing constraint DB 103. This is a functional unit that acquires the numerical parameter of the feature shape and the numerical parameter of the arrangement distance from the DB 105 of the numerical parameter of the improvement feature shape and the numerical parameter of the arrangement distance, and deforms the model shape accordingly.

  Reference numeral 220 denotes a display device that displays a shape and the like in accordance with a command from the CPU 200. Reference numeral 221 denotes a keyboard capable of inputting instruction contents. A pointing device 222 is also capable of inputting necessary instruction contents. A memory 223 includes a semiconductor storage device such as a RAM for storing CAD data and CAD programs, a magnetic storage device, and the like. The storage device can store design data including arrangement data of members and shape data of a target shape portion from data created on CAD.

  Further, based on an instruction from the CPU 200, reference data for determining whether the positional relationship between the arrangement data and the shape data satisfies the standard is extracted from the DB 103 for manufacturing restrictions. Compare the shape from the stored design data and the reference data to confirm whether the criteria are satisfied, and if the determination result does not satisfy the criteria, extract the avoidance processing plan group from the DB 104 of the improvement plan Displayed on the display device 220 or the like. The avoidance processing plan group displayed on the display device 220 is selected using a pointing device 222 such as a mouse or the keyboard 221, and the numerical parameter of the improvement feature shape and the numerical value of the arrangement distance based on the selected avoidance processing content The design data is changed using a parameter DB 105 or the like, and the positional relationship between the arrangement data and the shape data is adjusted by generating a three-dimensional shape.

  FIG. 3 is a flowchart showing an operation for performing a shape comparison process in the component design support system according to the embodiment of the present invention. FIG. 4 is a flowchart showing an operation of displaying an improvement plan group in the component design support system according to the embodiment of the present invention. FIG. 5 is a flowchart showing an operation of changing (deforming) the model shape according to the selected improvement plan in the component design support system according to the embodiment of the present invention. FIG. 6 is a diagram showing, on the display device, parts that are out of manufacturing restrictions in the display output of the shape comparison result in the component design support system according to the embodiment of the present invention. FIG. 7 shows a result of calling up the numerical parameter of the feature shape for improvement proposal and the numerical parameter of the arrangement distance in accordance with the improvement proposal selected from the improvement proposal group in the component design support system according to the embodiment of the present invention. It is explanatory drawing and is not displayed on the display of an actual display apparatus. FIG. 8 is a diagram showing a deformed state in which the hole 605 is moved away from the edge and moved to the hole 805 along the improvement plan selected from the improvement plan group in the component design support system according to the embodiment of the present invention. .

  Hereinafter, the embodiments of the present invention will be described more specifically with reference to the flowcharts of FIGS. 3, 4, and 5, and FIGS. 6, 7, and 8. In FIG. 3, if there is a shape comparison instruction for the read CAD data in step S301, the process proceeds to the next step, and if there is no shape comparison instruction, an input instruction is waited.

  In step S302, it is searched whether a pre-registered feature shape on the model is used. In the case of the model shown in FIG. 6, a square hole 602, a burring 604, and a round hole 605 are detected. From the attribute of the 3D model 601, it can be seen that the thickness of the cold rolled steel sheet is 1 mm, and therefore the corresponding manufacturing constraint (relational expression) is specified.

  In step S303, if there is no pre-registered feature shape, the process is terminated, and if there is, the process proceeds to the next step. In step S304, the manufacturing constraint database 103 is searched for whether there is a manufacturing constraint related to the feature shape. A manufacturing constraint (relational expression) related to the detected feature shape is called from the server 101. In the example of FIG. 6, manufacturing restrictions (relational expressions) related to 602, 604, and 605 are called.

  In step S305, shape comparison is performed based on manufacturing constraints (relational expressions) related to the detected feature shape. In the example of FIG. 6, for example, with respect to the square hole 602, the shape comparison is performed based on the manufacturing restriction (relational expression) that “the distance between the bend and the hole is 5 t + R or more in general materials”. A comparison is made as to whether or not there is a bent portion within the distance range of (5t + R) from the square hole 602. Alternatively, the round hole 605 is a hole close to the edge. In addition, since the model has shape attributes such as dimensions and non-shape attributes such as articles associated as attributes, the system recognizes the position and shape (dimension) information of the target feature shape element from the model. it can. Based on the recognized information, for example, the shape comparison is automatically performed by the system based on the constraint that “the distance between the edge and the round hole is 2 t or more (at least 2 mm in general materials)”. The threshold value of how far to approach each feature shape, bend line of the bent part, outline of the outline, and how much the process needs to be considered depends on the material and thickness, but the memory of the operator Relying on has the advantage of being automatically calculated by the system because oversight and mistakes are likely to occur. Even if the drilling of the round hole 605 is performed in the same process as the outer shape punching, the round hole 605 is too close to the edge (outer shape line) and cannot be simultaneously punched. A simplified message 608 for a hole approaching the edge (outline) is displayed. Here, these simplified messages and detailed contents are not absolute, and if the request is given priority to mass productivity, it is not necessary to require forcing. The distance measurement rule between the respective shaped elements is configured so that the shortest distance parallel to the surface direction of the plate is measured so that it is not measured obliquely without being unfolded. It is clarified whether the distance of the bent portion is a distance measurement on the neutral line of the plate thickness or whether the elongation rate is taken into consideration.

  Reference numeral 607 denotes a discrimination display, which is displayed so that the simplified message 608 or the corresponding shape comparison result 610 can be visually identified as to which part is pointed out. For example, a red auxiliary line may be used.

  In step S306, if there is a part that is out of manufacturing constraints, the process proceeds to the next step, and if not, the process ends.

  In step S307, a simple message is called from the server 101. In FIG. 6, since there is a bent portion near the square hole 602, a simple message is called after the shape comparison. Or since the round hole 605 is approaching the outline of an external shape, a simple message is called after shape comparison.

  In step S308, a simplified message is displayed at a location to be improved on the display. In the present embodiment, not all of them are displayed on the display at the same time, but only a mark or a simple message 603 is displayed at a place that is out of manufacturing constraints (relational formulas), and the shape comparison is made in the detailed table 609. It is configured to display the result details.

  Reference numeral 610 denotes detailed contents corresponding to the simplified message 608 in the detailed table 609, and a link is made from the detailed contents 610 to display an improvement plan group.

  In FIG. 4, in step S <b> 401, the user clicks on the link from the detailed content 610 to see whether the display of the improvement plan group is requested. If there is a request to display the improvement plan group, the process proceeds to the next step, and if not, the request is waited for.

  If there is a display request in step S402, it is called from the improvement plan database 104 corresponding to the simplified message.

  In step S 403, the called improvement plan group (not shown) is displayed on the display device 220. Three improvement plans are described in the improvement proposal group linked from the detailed contents 610 (detailed explanation in the improvement proposal group is omitted).

  In FIG. 5, in step S501, an input instruction as to whether or not a specific improvement plan is selected from the improvement plan group is awaited. When there is a selection of a specific improvement plan, the process proceeds to the next step, and when there is no selection, the input instruction is waited until there is a selection.

  In step S <b> 502, the numerical value parameter of the improvement feature shape and the numerical parameter of the arrangement distance corresponding to the selected improvement plan are called from the server 101. In FIG. 7, reference numeral 701 denotes the called numerical parameter information, and it is understood that 2.5 t or more is necessary as a restriction on the arrangement distance to the outline of the outer shape, and 4 mm is necessary at the minimum.

  In step S503, the minimum distance (as the larger value of 2.5 mm and 4 mm) from the information shown in FIG. 7 and the thickness information (1 mm) of the attribute to the outline of the outline is calculated. That is, when 2.5 t is calculated with a plate thickness of 1 mm, it becomes 2.5 mm. However, since the minimum value is 4 mm, it can be seen that in this case, 4 mm is necessary.

  In step S504, the numerical parameter of the feature shape for improvement is called. In the example of the round hole 605, there is no numerical parameter for the target improvement feature shape because there is no need to change the shape. For example, in the case where the hole shape can be changed as an improvement plan, the shape is defined. The numerical parameters of the feature shape are presented (not shown).

  In step S505, the numerical value parameter of the feature shape presented in step S504 is calculated so that, for example, φ0.7 mm or more is necessary when the plate thickness is 1 mm.

  In step S506, it is determined whether the numerical value calculated in step S505 or another value is used. That is, instead of this value, for example, when it is desired to set φ0.8 mm, the value of the numerical value parameter of the shape may be changed from φ0.7 to φ0.8. As shown in FIG. 7, another window may be displayed and the cell whose value is to be changed may be clicked and directly edited. That is, when the minimum diameter of a round hole is a problem and a diameter of φ0.7 t or more is required at the minimum, “minimum value: φ0.7 t or more” is presented as a numerical parameter of the feature shape. In particular, when there is a reason for making φ0.7t or less, it is possible to give a drawing instruction of φ0.6t, and it is possible to make a meeting in advance with the manufacturing department if necessary.

  In step S507, the model shape is automatically changed (deformed) by the three-dimensional shape automatic generation unit 212 using the arrangement distance calculated in step S503 and the numerical parameter value changed in step S506.

  FIG. 8 shows a state in which the arrangement distance of the round hole 605 has changed to a round hole 805 according to the improvement plan, and the round hole is separated from the edge. At this time, the simplified message 608 may also be deleted.

  Alternatively, the model may be captured as an image, and in that case, the processing flow in FIG. 3 is as follows. That is, when an image is input by image formation or reading of image data, it is determined whether or not there is a shape comparison instruction for the input image (step S301). If there is a shape comparison instruction (yes) If so, proceed to the next step, and if there is no shape comparison instruction (if no), repeat this process when the image is input again or the image is changed. A search is made from the feature shape database (step S302), and it is determined whether or not there is a pre-registered feature shape. If there is no feature shape, the process is terminated. If there is no feature shape, the process proceeds to the next step (step S303). The manufacturing constraint database 103 is searched for whether there is a manufacturing constraint that corresponds to (step S3). 4) Then, the feature shape of the input image is compared with the manufacturing constraint (step S305), and the shape is compared to determine whether there is a part that is out of the manufacturing constraint. If there is no part (in the case of no), the shape comparison process is terminated (step S306), and if there is a part out (in the case of yes), the corresponding simplified message is called (step S307), A message may be displayed (step S308).

  However, these manufacturing restrictions are intended to stabilize the quality and reduce the mold cost in consideration of mass productivity, and production may be possible if the conditions are met by changing the manufacturing process. The system may be configured so that another selection can be made.

  In addition, the threshold value for how far to approach each feature shape, bend line of the bent part, and outline of the outline when it is necessary to consider the machining process varies depending on the material and plate thickness. Relying on this memory is easy to overlook and make mistakes, so there is an advantage of automatic calculation by the system.

  The distance measurement rule between each feature shape is configured to measure the shortest distance parallel to the surface direction of the plate so that it is not measured obliquely without being unfolded. It is clarified whether the distance between the bent portion and the bending line is measured on the neutral line of the plate thickness or whether the elongation rate is taken into account. Also, since the model has shape attributes such as dimensions and non-shape attributes such as articles associated as attributes, the system recognizes the target feature shape from the model, and information about its position and shape (dimension). Can be recognized.

  The model shape may not be automatically deformed, but may be configured to be in a preview state, or may be configured to be restored after the shape is changed.

  In addition, although various DBs (databases) are configured to be shared on the network, the case where they are owned by individual terminals without being shared is also included.

(Second embodiment)
FIG. 9 is a diagram for explaining a second embodiment according to the present invention. In FIG. 9, reference numeral 901 denotes a 3D model of a cold rolled steel sheet having a thickness of 1 mm. Reference numeral 902 denotes a square hole, which is formed near the bent portion 906. Reference numeral 903 denotes a simplified message, and the content of “square hole and bending are too close. 1.0 mm” is attached to the square hole 902 as a result of comparing the shapes. A detail table 909 displays details of the comparison result, and details that cannot be expressed in a simple message may be expressed in this table. In this embodiment, the detailed content corresponding to the simplified message 903 is 910, and the detailed content 910 is linked to an improvement plan group (not shown).

  When the improvement plan “add a vacant hole” is selected from the improvement plan group, the corresponding “numeric parameter of improvement feature shape and numerical parameter of arrangement distance” is called. FIG. 10 is an explanatory view of the called “numeric parameter of feature shape for improvement proposal and numerical parameter of arrangement distance”. In FIG. 10, the square hole has a horizontal width LY = 9 mm × vertical width LT = 7 mm, Although the distance to the line is D = 5 mm, if the horizontal width LYS = LY + 2 is set with a margin for the size of the discard hole to be added as an improvement plan, LYS = 9 + 2 = 11 mm, and the vertical width LTS = (D-3. 4) If x, LTS = (5-3.5) × 2 = 3 mm (3.5 is the distance between the discard hole and the square hole, 2 is twice the one-side dimension). On the other hand, for example, when changing the width of the discard hole shape from 11 to 10, for example, the value 11 of the numerical parameter of the feature shape is instructed to be changed to 10.

  FIG. 11 is a diagram for explaining an example after the change in the second embodiment according to the present invention. In FIG. 11, reference numeral 1101 denotes a 3D model of a cold rolled steel sheet having a thickness of 1 mm. Further, reference numeral 1120 denotes a feature shape instructed to be changed as shown in FIG. 10, that is, a horizontal and vertical discard hole instructed to change the value of a numerical parameter is on a bend line of a bending portion 906 close to the square hole 902. The system is automatically formed. By adding the discard hole 1120, the deformation of the square hole 902 is avoided.

  The threshold of how much distance to approach each feature shape, bend line, and outline is necessary depending on the material and thickness, but depends on the memory of the operator. Since oversight and mistakes are likely to occur, there is an advantage of automatic calculation by the system.

  As a rule for measuring the arrangement distance between each feature shape, the shortest distance parallel to the surface direction of the plate is measured, and the arrangement distance is not obliquely measured without being developed. It is clarified whether the distance between the bending line and the bending line is the distance measurement on the neutral line of the plate thickness or the elongation rate is taken into consideration. In addition, since the model has a shape attribute such as a dimension and a non-shape attribute such as an article associated with the attribute, the system can recognize the position and shape (dimension) information of the target feature shape from the model. .

  The model shape may not be automatically deformed, but may be configured to be in a preview state, or may be configured to be restored after the shape is changed. Further, although various DBs (databases) are configured to be shared on the network, they may be owned by individual terminals without being shared.

  An object of the present invention is to supply a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus, and the computer (or CPU or MPU) of the system or apparatus stores the storage medium. Needless to say, this can also be achieved by reading and executing the program code stored in.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code itself and the storage medium storing the program code constitute the present invention.

  As a storage medium for supplying the program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (basic system or operating system) running on the computer based on the instruction of the program code. Needless to say, a case where the functions of the above-described embodiment are realized by performing part or all of the actual processing and the processing is included.

  Further, after the program code read from the storage medium is written to a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. It goes without saying that the CPU or the like provided in the board or function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.

It is a block diagram showing the whole parts design support system concerning the example of the present invention. 1 is a block diagram showing in detail individual CAD terminals in a component design support system according to an embodiment of the present invention. It is a flowchart which shows the operation | movement which performs the process of a shape comparison in the component design support system which concerns on the Example of this invention. It is a flowchart which shows the operation | movement which displays the improvement plan group in the components design support system which concerns on the Example of this invention. It is a flowchart which shows the operation | movement which changes (deforms) a model shape according to the selected improvement plan in the components design support system which concerns on the Example of this invention. In the component design support system which concerns on the Example of this invention, it is the figure which is displaying on the display apparatus the location which is remove | deviated from restrictions on manufacture by the display output of the result of a shape comparison. In the component design support system according to the embodiment of the present invention, according to the improvement plan selected from the improvement plan group, it is an explanatory diagram of information referring to the numerical parameter of the feature shape for improvement plan and the numerical parameter of the arrangement distance . In the component design support system which concerns on the Example of this invention, it is a figure which shows the state which deform | transformed along the improvement plan selected from the improvement plan group. It is a figure for demonstrating the 2nd Example which concerns on this invention. It is explanatory drawing for demonstrating an example of the referred numerical parameter in 2nd Example which concerns on this invention. It is a figure for demonstrating an example after a change in 2nd Example which concerns on this invention.

Explanation of symbols

101 Server 102 Feature DB
103 DB of manufacturing restrictions
104 DB of improvement plan when it falls out of manufacturing restrictions
105 Numerical parameter DB of feature shape for improvement proposal and numerical parameter DB of arrangement distance
107, 108 CAD terminal 200 CPU
DESCRIPTION OF SYMBOLS 201 Shape creation part 202 3D shape edit function part 203 Shape attribute edit function part 204 Outside shape attribute creation part 205 Range edit function part 206 Outside shape attribute edit function part 210 External connection device 211 Shape comparison confirmation function part 212 3D shape automatic Generation unit 220 Display device 221 Keyboard 222 Pointing device 223 Memory

Claims (5)

A component design support method applied to 3DCAD,
For a feature shape created by determining a numerical parameter of a registered feature shape , a comparison means allows a manufacturing-allowed size constraint, and a manufacturing-allowance between individual feature shapes of the feature shape group. A step of comparing the restriction of the arrangement distance and the restriction of the arrangement distance allowed for manufacturing between the individual feature shape and the part model with the feature shape created by the user;
When the feature shape created by the user does not conform to the manufacturing constraints as a result of the comparison, the display means displays the target portion on the display device in a different manner , and the feature shape created by the user A process of presenting a group of improvement plans for correction of size and arrangement distance;
An obtaining means for obtaining the registered numerical parameter corresponding to the improvement plan selected by the user from the improvement plan group ;
The changing unit changes the size and arrangement distance of the feature shape created by the user based on the acquired numerical parameter , or adds the new feature shape created based on the acquired numerical parameter and changes the part model and,
A component design support method characterized by comprising: A component design support system applied to 3D CAD,
For the feature shape made by determining the numerical parameters of the registered feature shape, size constraints acceptable manufacturing constraints produced acceptable disposed a distance between the individual features the shape of the feature shape group and comparison means for performing constraints and manufacturing acceptable disposed distance between the individual features shape and the part model, the comparison of the feature shape created by the user,
As a result of the comparison, if the feature shape created by the user does not meet the manufacturing constraints, the target location is displayed on the display device in a different manner, and the size and arrangement distance of the feature shape created by the user A display means for presenting an improvement proposal group for the correction of
Obtaining means for obtaining the registered numerical parameter corresponding to the improvement plan selected by the user from the improvement plan group;
Change means for changing the size and arrangement distance of the feature shape created by the user based on the acquired numerical parameter, or changing the part model by adding a new feature shape created based on the acquired numerical parameter;
A part design support system with features. For the feature shape made by determining the numerical parameters of the registered feature shape, size constraints acceptable manufacturing constraints produced acceptable disposed a distance between the individual features the shape of the feature shape group and producing acceptable arranged distance constraints between the individual features shape and component models, the plate Atsubetsu, by material, contour, hole shape, bend angle, the group consisting of those relating to the drilling position, the bending position The part design support system according to claim 2, wherein the system is selected from the following. A part design support program applied to 3DCAD,
For the feature shape made by determining the numerical parameters of the registered feature shape, size constraints acceptable manufacturing constraints produced acceptable disposed a distance between the individual features the shape of the feature shape group , And a process of comparing the manufacturing-acceptable arrangement distance between the individual feature shape and the part model with the feature shape created by the user;
As a result of the comparison, if the feature shape created by the user does not meet the manufacturing constraints , the target location is displayed on the display device in a different manner, and the size and arrangement distance of the feature shape created by the user Processing to present a group of improvement plans for the correction of
Processing for obtaining the registered numerical parameter corresponding to the improvement plan selected by the user from the improvement plan group ;
Changing the size and arrangement distance of the feature shape created by the user based on the acquired numerical parameter, or changing the part model by adding a new feature shape created based on the acquired numerical parameter;
Design support program for causing a computer to execute After modifying the size and arrangement distance of the feature shape in which the user created, component design support program according to claim 4, characterized in that it is possible to return to the state before the change.

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