JP4479339B2 - Design and manufacturing support system, method and program - Google Patents

Description

  The present invention relates to a system, method, and program for managing and displaying processing of nominal dimensions and dimensional tolerance data for product shape data in a design and manufacturing support system for machine products and the like.

  In a conventional CAD (Computer Aided Design) system that supports designers who perform shape design of machine products, etc., the finished specification of product shape processing and assembly can be applied to shape data representing the geometric shape of the product. Nominal dimension data that does not include tolerances for processing and assembly, which are standards for communicating to production personnel, including designers, manufacturers, and inspectors, and dimension tolerance data that defines tolerances for finished product specifications It is possible to create a drawing or a three-dimensional model. In the CAD system, the shape data of drawings and 3D models and the assigned nominal size data are linked while maintaining a constraint relationship, and one of the shape data and the nominal size data is edited to maintain the consistency of both. It has a parametric design function that can change product shape data and nominal size data.

  On the manufacturing side, shape data for machining required when machining products with NC machine tools based on the shape data, nominal dimension data, tolerance data, and other annotation data of the drawings or 3D models created by the design. The process designer uses a CAM (Computer Aided Manufacturing) system. The shape data for machining refers to shape data to be input when generating NC tool path data in the CAM system. Converting the design shape data, which is the shape data of the drawing created by the design or the 3D model, into the shape data for machining is that the nominal dimension data corresponding to the design shape data is within the tolerance of the tolerance data and the NC machining target This is nothing but conversion into unique dimension values, that is, machining target value data.

  In order to process the product according to the design specifications, the process designer selects the optimal manufacturing equipment and manufacturing method that can be taken in consideration of the product shape, material, etc., and the processing target value data is unique within the tolerance of the tolerance data It requires manufacturing know-how to be determined. However, this processing target value is generally not described in a drawing, a three-dimensional model, or a work instruction for a manufacturing worker, and tends to be personal know-how possessed by a process designer or manufacturing worker. There is still no mechanism for recording and displaying the processing target value data in a unified manner in association with the shape data, nominal dimension data, and tolerance data determined by design.

  In Japanese Patent Laid-Open No. 7-105271 (hereinafter referred to as Patent Document 1), a dimension in which the vertical tolerance of the tolerance data on the drawing is shifted to either side is searched, and the shape data of that portion is the vertical tolerance. There is a proposal to perform a dimensional tolerance intermediate value process for automatically correcting the shape data so that it is exactly the intermediate value so that the intermediate value can be displayed as nominal size data on a commercially available CAD system. At this time, the tolerance tolerance of the tolerance data is recalculated from the intermediate value so as to be equal to the top and bottom, and is displayed together with the nominal dimension data.

  In Japanese Patent No. 2947367 (hereinafter referred to as Patent Document 2), in an inspection drawing in a dimension measurement inspection after processing, two-dimensional shape data indicating a measurement object, nominal dimension data corresponding to the shape data, tolerance data, and measurement results are disclosed. There is a proposal to store the values of the test results in association with each other and arrange the test result values close to the corresponding tolerance data.

JP-A-7-105271 Japanese Patent No. 2947367

  In the proposal of Patent Document 1, the shape data cannot be edited when an arbitrary value is set as the machining target value within the upper and lower tolerances of the tolerance data, and depending on the shape of the part having a complicated fitting portion, However, there is a problem that it is not possible to cope with creation of machining shape data only by the dimensional tolerance intermediate value processing. Further, according to the proposal of Patent Document 1, the original nominal size and the tolerance data with the upper and lower sides left in the drawing or the like by the designer do not remain. Tolerance data with a deviation on either the upper or lower side is one of the important methods to express the design intention, which is indispensable for processing instructions for complex shape parts, in addition to parts with fitting parts, to dimensional tolerances. Since this design intent does not remain, there is a problem that it is not possible to make a decision to select a suitable equipment from manufacturing equipment such as processing machines and tools having various precision capabilities after the manufacturing department has solved the design intent.

  In the proposal of Patent Document 2, the processing target is limited to the inspection drawing, and only the relationship between the value of the inspection result and the corresponding shape data is attached, and the shape data and the value of the inspection result do not act in conjunction with each other. The shape data for machining and the machining target value as input of the CAM system cannot be displayed in association with each other. Further, in the proposal of Patent Document 2, since nominal dimension data, tolerance data, and processing target values linked to shape data cannot be stored in association with shape data of a three-dimensional model, design, manufacturing, and inspection are performed. There is a problem that it cannot be used as centralized design / manufacturing data that can be shared.

  An object of the present invention is to store product shape data, nominal dimension data, tolerance data, machining target value data as unified design manufacturing data that can be shared in design, manufacturing, and inspection, overcoming the above-described problems, It is an object of the present invention to provide a design / manufacturing support system capable of transmitting and sharing tolerance data as design intent and machining target value data as manufacturing know-how to manufacturing and inspection, respectively.

  In the design and manufacturing support system, the shape data of the drawing or 3D model, the nominal dimension data given to the shape data, the tolerance data that defines the vertical tolerance of the nominal dimension data, and the dimension value that is the target of machining during machining A storage processing unit that performs storage processing in association with processing target value data that is uniquely determined, and the nominal size data, the tolerance data, and the processing target value data are displayed together with corresponding shape data and displayed on a display device. And means for performing.

  The design / manufacturing support system further comprises means for determining whether the machining target value data exceeds a range of the vertical tolerance.

  The design / manufacturing support system further includes means for distinguishing and displaying the processing target value, the nominal dimension data, and the corresponding tolerance data.

According to the present invention, the machining target value data can be edited and displayed on the CAD system from the drawing of the product created by design or the shape data, nominal dimension data, and tolerance data of the three-dimensional model. By transferring the data to the manufacturing CAM system,
NC data can be created efficiently, and the trouble of recreating shape data for processing on the manufacturing side can be reduced.

  Examples of the present invention will be described below.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the design and manufacturing support system of the present invention. The design / manufacturing support system 1 has a shape / data storage area 3, a nominal dimension data storage area 4, a tolerance data storage area 5 and a machining target value data storage area 6 and performs design / manufacturing data storage processing means 2 for storing each data. Dimension tolerance display processing means 7 for performing the display processing of each data, an input device such as a keyboard 8 and a mouse 9 for inputting each data, and an output device such as a display device 10 for outputting the dimensional tolerance display processing.

  In the design / manufacturing support system 1, shape data, nominal dimension data, tolerance data, and machining target value data are input by the input device of the keyboard 8 and the mouse 9, and stored in each storage area by the design / manufacturing data storage processing means 2. .

  FIG. 2 shows an example of each data. The shape data handled in the present invention is two-dimensional projection shape data or three-dimensional model data of a bottom circular shape or a side cylindrical shape of a cylindrical part. The nominal dimension data handled in the present embodiment is a value that does not include a machining tolerance in the dimensions of the finished product specifications determined by the designer. In addition, the tolerance data handled in the present embodiment is a value that defines a processing tolerance for the nominal size. For example, in FIG. 2A, the nominal dimension data of 50.0 mm is attached to the diameter dimension representing the bottom diameter of the cylindrical part. In addition, the tolerance value above the tolerance is +0.2, and the tolerance value below is 0, and these are combined into tolerance data.

  FIG. 3 shows an example of the display processing result of the machining target value data in the dimension tolerance display processing means 7. The processing target value data handled in this embodiment is within the upper and lower tolerances of the nominal dimension data determined by the designer after the process designer or NC data creator considers the manufacturing equipment and manufacturing method of the manufacturing department. It is a value that determines the target value for machining. As shown in FIG. 3 (a), for example, the machining target value data is identified by a delimiter such as a square bracket character so that it can be identified at a position adjacent to the nominal dimension data and the tolerance data indicating the vertical tolerance value. Data and tolerance data are displayed separately. FIG. 3A shows an example in which the processing for displaying the processing target value data is performed for the dimension given to the shape data of the three-dimensional model of the product by the dimension tolerance display processing unit, as shown in FIG. In addition, the display process is similarly performed on the dimensions given to the two-dimensional shape data in the product drawing.

  According to the present embodiment, the machining target value is displayed together with the nominal dimension data and tolerance data and displayed at the same time. Therefore, the manufacturing person in charge considers the machining target value and the tolerance data, and the manufacturing equipment and manufacturing method suitable for the manufactured product. Can be selected.

  FIG. 4 explains each data structure of shape data, nominal dimension data, tolerance data, and machining target value data. FIG. 4A shows an example of the shape data structure. The shape data includes a shape ID, a shape type, geometric data, and a corresponding dimension ID. The shape ID is an ID indicating a shape such as a cylindrical surface or a flat surface. The shape type represents a type of shape such as a cylindrical surface or a flat surface. For example, in the case of a cylindrical surface, the geometric data represents geometric parameters such as a reference point, an axis vector, a diameter, and a height. Corresponding dimension ID represents the ID of the corresponding nominal dimension data when the dimension is attached to the shape. FIG. 4E shows a cylindrical shape corresponding to the data structure. The cylindrical shape includes a cylindrical surface shape having a shape ID = G10001, a planar shape having a shape ID = G10002 and a shape ID = G10003. The cylindrical surface shape is composed of geometric data such as a reference point p1, an axis vector v1, a diameter d, and a height h. The planar shape is composed of geometric data such as a reference point p2 and a normal vector v2.

  FIG. 4B shows an example of nominal size data corresponding to the shape data. The cylindrical surface shape with the shape ID = G10001 corresponds to the nominal dimension data with the dimension ID = D20001, and the plane with the shape ID = G10002 and the shape ID = G10003 corresponds to the nominal dimension data with the dimension ID = D20002. The nominal dimension data includes a dimension type, a reference position, a dimension value, and a corresponding tolerance ID. The dimension type represents a type of dimension such as a distance dimension, a diameter dimension, and an angle dimension. The reference position represents a reference position for displaying nominal dimension data, and is represented by a two-dimensional coordinate value in a two-dimensional drawing and a three-dimensional coordinate value in a three-dimensional model. The dimension value is a nominal dimension value. The corresponding tolerance ID is an ID of tolerance data when a tolerance is added to the nominal dimension.

  FIG. 4C shows an example of tolerance data corresponding to the nominal size data. The nominal dimension of dimension ID = D20001 corresponds to tolerance ID = T30001, and the nominal dimension of dimension ID = D20002 corresponds to tolerance ID = T30002. The tolerance data includes a tolerance type, a reference position, a tolerance value, and a corresponding machining target value ID. The tolerance type represents the upper and lower tolerance types such as +0.2 for the upper dimensional tolerance and 0 for the lower dimensional tolerance, the maximum allowable dimension of 50.2, and the minimum allowable dimension of 50.0. There are large and small allowable dimension types. The reference position stores a point coordinate value with respect to a predetermined position behind which the dimension value is displayed as a character string from the reference position of the nominal dimension data. Tolerance values are expressed in accordance with the above tolerance type, such as upper dimensional tolerance +0.2 for the vertical tolerance type, and lower dimensional tolerance 0 for the tolerance type. The dimensions are expressed as 50.0. The corresponding machining target value ID is an ID of the machining target value corresponding to the tolerance.

  FIG. 4D shows an example of machining target value data corresponding to the tolerance data. The tolerance of the tolerance ID = T30001 corresponds to the machining target value ID = M40001, and the tolerance of the tolerance ID = T30002 corresponds to the machining target value ID = M40002. The machining target value data includes a reference position and a machining target value.

  The reference position stores, for example, a point coordinate value with respect to a predetermined position behind the reference position of the nominal dimension data and the reference position of the tolerance data, in which the dimension value and the tolerance value are displayed as character strings.

  FIG. 5 shows a processing flow of the design / manufacturing data storage processing unit in the design / manufacturing support system according to the present invention. In the design / manufacturing support system according to the present invention, the design / manufacturing data storage processing unit 2 stores shape data of a product to be processed which is input by a user such as a designer or a process designer using an input device such as a keyboard 8 or a mouse 9. (Step S101). Further, nominal dimension data corresponding to the shape data is stored (step S102), tolerance data defining the vertical tolerance value corresponding to the nominal dimension data is stored (step S103), and the machining target value that falls within the tolerance is stored. The data is stored in association with each other (step S104).

  FIG. 6 shows a processing flow of the dimension tolerance display processing unit in the design and manufacturing support system according to the present invention. The design / manufacturing support system first displays the shape data of the design target product through an output device such as a display (step S201). The dimension tolerance display processing means 7 calls the nominal dimension data corresponding to the shape data from the design / manufacturing data storage processing unit (step S202). Subsequently, it is determined whether or not the nominal dimension data exists (step S203). If the nominal dimension data exists, the nominal dimension data is displayed at a predetermined position corresponding to the shape data (step S204). If there is no data, the subsequent display processing is not performed. In step S203, when the nominal dimension data exists, the corresponding tolerance data is continuously called from the design / manufacturing data storage processing unit (step S205). Subsequently, it is determined whether or not tolerance data exists (step S206). If the tolerance data exists, the tolerance data is displayed at a predetermined position near the corresponding nominal dimension data (step S207). If there is no tolerance data corresponding to the nominal dimension data, the subsequent display processing is not performed. If tolerance data exists in step S206, the corresponding machining target value data is continuously called from the design / manufacturing data storage processing unit (step S208). Subsequently, it is determined whether or not the machining target value data exists (step S209). If the machining target value data exists, the machining target value data is displayed at a position close to the corresponding tolerance data (step S210). .

  FIG. 7 describes the display positions of nominal dimension data, tolerance data, and machining target value data corresponding to shape data. Nominal dimension data and tolerance data are displayed at the position where the design target product conforms to the dimensional notation rules defined by the standard such as ISO, JIS for three-dimensional shapes and ASME, ISO for three-dimensional shapes ( It is a predetermined position adjacent to a dimension lead line or a dimension line corresponding to a distance dimension, a diameter dimension, an angle dimension, etc.). The position where the machining target value data is displayed is adjacent to the position where the nominal dimension data and the tolerance data are displayed. For example, as shown in FIG. 7A, the rear position following the tolerance data and the position shown in FIG. Is displayed below the tolerance data. If it is a diameter dimension, as shown in FIG. 7C, if it is an angle dimension, it is displayed at a position close to the dimension tolerance data as shown in FIG. 7D.

  FIG. 8A shows a configuration in which the machining target value determination processing means 11 in the present invention is added. FIG. 9 shows a processing flow of the processing target value determination processing means. The machining target value determination processing means 11 first refers to nominal dimension data or corresponding tolerance data or corresponding machining target value data displayed on the display device by a user such as a designer, or shape data corresponding thereto. Then, selection of machining target value data is accepted by selecting one of the data through the input device (step S301). Subsequently, nominal dimension data and tolerance data corresponding to the selected machining target value data in the design / manufacturing data storage unit are called (step S302). The maximum allowable dimension value and the minimum allowable dimension value are calculated from the called dimension data and tolerance data (step S303). An intermediate dimension value of tolerance is calculated by an arithmetic mean of the maximum allowable dimension value and the minimum allowable dimension value, and is presented to the user as a machining target value (step S303-1). Subsequently, editing of the machining target value from the user is accepted (step S304).

The machining target value is compared between the maximum allowable dimension value and the minimum allowable dimension value (step S305). If the machining target value is greater than or equal to the minimum allowable dimension value and less than or equal to the maximum allowable dimension value, machining is performed by the user through the input device. Confirmation of whether the target value may be an input value is accepted (step S306). If the confirmation result is YES, the machining target value is stored in the machining target value data storage area of the design manufacturing data storage processing unit (step S307), The process ends. If the machining target value is out of the range between the maximum allowable dimension value and the minimum allowable dimension value in step S305, the fact is shown as a warning message to a user such as a designer through the display device (step S308). It is confirmed whether or not the process is interrupted (step S309). If the process is not interrupted, the process returns to step S304 for inputting / editing the machining target value. If the process is interrupted in step S309, the input editing process is terminated.

  FIGS. 10A and 10B show examples of input / editing dialogs for tolerance / machining target value data. FIG. 10A shows a case where the tolerance data is displayed with a vertical tolerance, and FIG. 10B shows a case where the tolerance data is displayed with a maximum and minimum allowable dimension value.

  FIG. 8B shows a configuration in which a dimensional tolerance imparting processing means 12 according to the present invention is added. FIG. 11 shows a processing flow of the dimensional tolerance adding processing means. The dimension tolerance provision processing means 12 first prompts the user to select the shape data of the surface to which the dimension tolerance is to be given (step S401). When the surface to which the dimensional tolerance is to be applied is selected, the dimensional type to be applied is determined according to the shape type of the surface (step S402). For example, when the selected surface is a surface of geometric data including a diameter such as a cylindrical surface or an annular surface and is selected as a single unit, the dimension type is determined to be a radial dimension type, and multiple surfaces such as planes and circular ridge lines are selected. If it is determined, the dimension type is determined to be the distance dimension type or the angle dimension type by user confirmation. Subsequently, a tolerance / machining target value editing dialog is displayed (step S403), and input editing of tolerance data by the user is accepted (step S404). After referring to the corresponding nominal dimension data and calculating the maximum allowable dimension value and the minimum allowable dimension value from the vertical tolerance value of the tolerance data (step S405), input editing of the machining target value data is accepted (step S406). It is determined whether the machining target value data is not less than the minimum allowable dimension value and not more than the maximum allowable dimension value (step S407), and if within the range, the user confirms the machining target value (step S408). The tolerance data and the machining target value data are stored in the respective storage areas of the design / manufacturing data storage processing unit (step S409). Subsequently, the geometric value of the shape data is converted according to the value of the processing target value data (step S410). For example, when the machining target value data corresponding to the cylindrical surface shape data having the nominal diameter data of 50.0 is edited to 50.1, the geometric value of the diameter of the cylindrical surface shape data is converted to 50.1. Thus, the cylindrical surface shape data is displayed as a cylindrical surface shape having a diameter of 50.1 through the display device in the design and manufacturing support system. Subsequently, a dimension line corresponding to the target shape data is given (step S411), and nominal dimension data, tolerance data, and machining target value data are given according to each reference position (step S412).

  FIG. 4E shows a display example of dimension lines, nominal dimension data, tolerance data, and machining target value data added to product shape data.

  FIG. 12 shows another display example of the machining target value data in the present invention. FIG. 12A is a display example in which the machining target value data is written together with the nominal dimension data and the tolerance data as a difference value with respect to the corresponding nominal dimension data. FIG. 12B shows an example in which display delimiters for identifying the machining target value data as nominal size data and tolerance data are displayed using unused parenthesis characters in the dimension display standard. FIG. 12C is a display example when the absolute values of the upper and lower tolerance values of the tolerance data are equal. As the delimiter, a symbol that can distinguish the nominal dimension data, the tolerance data, and the machining target value data may be used, except for the parentheses as a reference dimension used in the drafting standard. Further, as a method of identifying, the font or format of the display character of the machining target value data may be referred to, and the font of the display character of the dimension data and tolerance data may be changed and displayed. FIG. 12D shows an example in which the display font of the processing target value data is changed so that it can be distinguished from the nominal size data and the tolerance data. FIG. 12E shows an example in which the display character format of the machining target value data is changed so that it can be distinguished from the nominal dimension data and the tolerance data. FIG. 12C shows an example in which the display character color of the processing target value data is changed so as to be distinguished from the nominal size data and the tolerance data.

FIG. 13A shows a data configuration example in which the determination result of the processing target value determination processing unit 11 is added to the configuration of the processing target value data as an in-tolerance determination result as an embodiment of the present invention. In the configuration of the machining target value data shown in FIG. 13A, if the machining target value of machining target value ID = M40001 is 50.1 and is within the upper and lower tolerances of the corresponding tolerance data, the determination result is stored appropriately. . If the machining target value of the machining target value ID = M40002 is 100.6 and the corresponding tolerance data is outside the vertical tolerance, the determination result is stored as “No”. FIG. 13B shows an example in which the dimensional tolerance display processing means 7 presents the determination result to the user using the configuration of the machining target value data. Here, the dimension line, nominal dimension data, tolerance data, and machining target value data corresponding to the machining target value data 13 outside the tolerance of machining target value ID = M40002 for which the judgment result within tolerance is negative are identified from other data. It is an example of giving a color so that it can be done. In addition, the characters of the machining target value data for which the determination result within the tolerance is negative may be displayed in a highlighted manner, surrounded by a frame line, or blinked. In addition, the shape data, nominal dimension data, tolerance data, and machining target value data stored in the design / manufacturing data storage processing means 2 in the design / manufacturing support system according to the present invention can be created in a text file format in other CAM systems or the like that can create NC data. At the time of output, it is also possible to output the machining target value data within the tolerance determination result and use it to determine the suitability of NC data creation.

  According to the above-described embodiment, the shape data, the nominal dimension data, the tolerance data, and the machining target value data of the drawing or the three-dimensional model can be used as a unified data for manufacturing work instructions, inspection procedures, etc. Inconsistency in the shape data for processing between inspections is eliminated, and the quality of product design and manufacturing data in the product production process is improved.

  By using the present invention for a CAD system that can handle a parametric three-dimensional model, the machining target value can be confirmed in association with dimensions and dimensional tolerances, and can be used for a dimension check for approval of a three-dimensional model. be able to.

1 is a configuration diagram of a design and manufacturing support system in an embodiment of the present invention. (A) Explanatory drawing which shows display of nominal dimension and tolerance attached to product three-dimensional model, (b) (c) Explanatory drawing which shows display of nominal dimension and tolerance attached to product drawing projection drawing. (A) Explanatory drawing which shows the display of the processing target value data attached to the product three-dimensional model, (b) (c) Explanatory drawing which shows the display of the processing target value data attached to the product drawing projection view. (A) Explanatory diagram showing data structure of shape data, (b) Explanatory diagram showing data structure of nominal size data, (c) Explanatory diagram showing data structure of tolerance data, (d) Data structure of machining target value data (E) Explanatory drawing which shows the example of the display position of each data. The processing flowchart of the storage process of each data by one Example. The processing flowchart of the display process of each data by one Example. Explanatory drawing which shows the display position of the process target value data by one Example. (A) The block diagram of the design manufacture support system in the 2nd Example of this invention, (b) The block diagram of the design manufacture support system in the 3rd Example of this invention. The processing flowchart of the process target value data edit process by a 2nd Example. The tolerance edit data and machining target value data input edit dialog interface figure in one example of the present invention. The processing flowchart of the dimension tolerance provision process by a 3rd Example. The example written together with the tolerance data of the process target value data in one Example of this invention. (A) The figure which shows the structure of the process target value data in one Example of this invention, (b) The example of a display of the process target value data in one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Design manufacturing support system, 2 ... Design manufacturing data storage processing means, 3 ... Shape data storage area, 4 ... Nominal dimension data storage area, 5 ... Tolerance data storage area, 6 ... Processing target value data storage area, 7 ... Dimensions Tolerance display processing means, 8... Keyboard, 9 .. mouse, 10... Display device, 11... Machining target value determination processing means, 12.

Claims (9)

Shape data of figures or three-dimensional model, nominal size data assigned to the shape data storage processing in association with the forming target value data about the dimension values to be tolerance data and processing of the target defining the upper and lower tolerances Nominal Data and design and manufacturing data storage processing means for, the nominal size data read from the design and manufacturing data storage processing unit, the dimensions of display processing on a display device the tolerance data and the processing target data and also shown with the corresponding shape data design manufacture support system characterized by comprising a tolerance displaying means. Oite design production support system according to claim 1,
The machining target value data read from the design and manufacturing data storage processing means, characterized in that it comprises determination means for determining whether the exceeding of said upper and lower tolerance read from the design and manufacturing data storage processing unit Design manufacturing support system. Oite design production support system according to claim 1,
The design manufacturing support system characterized in that the display means distinguishes and displays at least any two of the machining target value data, the nominal dimension data, and corresponding tolerance data. Design / manufacturing data storage processing for shape data of drawings or three-dimensional models, nominal dimension data given to the shape data, tolerance data for defining the upper and lower tolerances of the nominal dimension data, and machining target value data relating to the dimension value to be machined and design and manufacturing data storage procedure for storing processing in the storage means in association with means, before crisis憶the nominal size data read from the unit, the tolerance data and the processing target value data, corresponding the dimensional tolerance displaying means A design / manufacturing support method characterized in that a dimensional tolerance display procedure for performing display processing on a display means together with shape data is executed by a computer . Oite design production support method according to claim 4,
A design / manufacturing support method comprising: a determination procedure for determining whether or not the machining target value data read from the storage means exceeds a range of the vertical tolerance. Oite design production support method according to claim 4,
The dimensional tolerance display procedure distinguishes and displays at least any two of the processing target value data, the nominal dimension data, and the corresponding tolerance data. Shape data of figures or three-dimensional model of the computer, nominal size data assigned to the shape data, in association with the forming target value data about the dimension values to be tolerance data and processing of the target defining the upper and lower tolerances Nominal Data design and manufacturing data storage processing means for storing processing and display processing on the design and manufacturing data storage process read the nominal dimension data from the means, display the tolerance data and the processing target data and also shown with the corresponding shape data device A design / manufacturing support program which functions as a dimensional tolerance display processing means. Oite the design production support program according to claim 7,
Said forming target value data of the computer read out from the design and manufacturing data storage processing means, to function as a judging means for judging whether the exceeding of said upper and lower tolerance read from the design and manufacturing data storage processing unit A featured design and manufacturing support program. Oite the design production support program according to claim 7,
The dimensional tolerance display processing means distinguishes and displays at least any two of the machining target value data, the nominal dimension data, and the corresponding tolerance data.

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