JPH0215098B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention creates and inputs basic design data while interacting with a computer by inputting the product shape, and uses this data to create strip layout diagrams, parts diagrams, and assembly for progressive molds. This paper relates to an information processing method in progressive mold design that enables diagram creation and NC tape creation. [Prior art and problems] A progressive mold is one in which the inside of one mold is divided into several stages, and each stage performs processing little by little, and finally the product is finished. Progressive mold CAD (Camputer Aided Design) systems are used, for example, to produce mechanical electronic components such as connectors, or IC lead frames. FIG. 1 is a diagram showing an example of processing functions provided as a mold in a progressive mold CAD system. As shown in Fig. 1, processing functions include not only punching but also bending, forming, doweling, and notching. If you try to achieve this with a conventional CAD system, if you focus on a certain plate, such as a die plate, you will have to generate line segments interactively, or extract standard parts one by one from a database and create them on this plate. Do the design. This method is called horizontal design. In horizontal design, it is possible to obtain design consistency within the plate, that is, within the plane, but in order to create a completed mold, shapes are selected sequentially on the plate. However, it takes a lot of operation time to modify the array. It is a heavy burden on the designer to achieve alignment in the vertical direction, that is, in the overall structure of the mold. There are other problems. This is because conventional CAD systems have difficulty expressing vertical relationships. As described above, in the conventional progressive mold CAD system, standardized part shape data is registered in advance as a standard data file, and when necessary, the desired part shape can be selected from this standard data file. There are many index-type processing methods for extracting data, which require a lot of human intervention, and a huge amount of data and
files were essential. [Object of the invention] The present invention is based on the above considerations, and includes:
The purpose of this invention is to provide an information processing method for progressive die design that automates progressive die design, prevents design errors, and reduces design labor. [Structure of the Invention] For this purpose, the information processing method in the progressive mold design of the present invention uses shape definition data such as points, straight lines, arcs, and contours obtained from product drawings, the thickness of the material,
Enter material definition data such as width, material, shear coefficient, bending constant, etc. as product information, and
It is an information processing method for progressive mold design in which progressive mold design is performed interactively on a display.In addition to inputting product information and creating graphic data, a blank screen with multiple developed product diagrams arranged on a graphic display is used. Linguistic input processing means for displaying layout diagrams, strip layout processing means for interactively creating core shapes that define processing on stage based on blank layout diagrams, core shapes, bending angles, notch depths, etc. A mold design processing means that creates attribute data such as dimensions and tolerances of parts based on the auxiliary data of , and creates assembly drawing/parts drawing data based on the attribute data;
and processing information creation processing means for creating processing data for plate processing based on the attribute data, and the mold design processing means changes the assembly drawing/parts drawing data by changing the attribute data in an interactive manner. This feature is characterized in that it is configured to be able to perform corrections. Here, the core figure refers to a figure representing a machining area for one unit of machining performed inside the mold. For example, in punching, it is the outline figure of the punched hole, in bending, it is a four-sided figure that includes the area to be bent, and in crushing, it is a four-sided figure that shows the processing area to be crushed and formed.
It is a rectangular figure. [Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a diagram showing the configuration of one embodiment of the present invention. In FIG. 2, 1 is a graphic data file, 2 is an attribute data file, 3 is a processing data file, 4 is a group of graphic processing function modules,
5 is an attribute processing function module group, 6 is a processing function module group, 7 is product information, 8 is a language input processing section, 9 is a strip layout processing section, 10
11 is a mold design processing section, 11 is a processing information creation processing section,
12 is a graphic utility, 13 is a plot utility, 14 is a plotter, and 15 is a graphic display. Graphic data/
File 1 is a file for registering two-dimensional figure data such as core figures, strip layout diagrams, manufacturing drawings, etc., and attribute data file 2 is
This is a file that registers data representing the dimensions, tolerances, positional relationships, and combination information of the parts that make up the unit. Machining data file 3 is the processing type required for drilling holes in the plate (drilling, milling, tapping, etc.) This is a file that registers data such as machining position, dimensions, and machining order. Product information 7 is a shape definition statement and material definition statement obtained from the product drawing, and specifies data expressing points, straight lines, circular arcs, contours, etc., as well as material thickness/width, material, shear coefficient, and bending constant. This is the data that will be used. In other words, the first part of the product information 7 is product shape data. The product shape is originally a three-dimensional shape, but here it is defined as a collection of two-dimensional shapes and input. The second is product material data. For manufacturing using progressive molds, long thin sheets are used. Then input the material name, plate thickness, width, etc. of this material. As shown in FIG. 2, the present invention includes a graphic processing function module group 4, an attribute processing function module group 5,
and a processing function module group 6, a language input section 8, a strip layout processing section 9, a mold design processing section 10, and a processing information creation processing section 11, which sequentially call these modules to perform processing. It has four processing modules. The graphic processing function module group 4 performs graphic definition, graphic conversion, set operations, development diagram creation, offset processing, garbage collection, and the like. In figure definition, after interpreting the part program and performing intersection calculations, etc., the figure data is
Register in file 1. In the graphic conversion, calculations such as movement conversion, rotation conversion, enlargement/reduction conversion, etc. of the graphic are performed, and the graphic data is registered in the graphic data file 1. Set operations are performed on sums, differences, and products of two-dimensional figures. In creating a developed figure, a developed figure is created by connecting the figure data separated by bending lines. In offset processing,
Offsets a contour shape by the specified value.
Garbage Collection
Now, let the system return unused data areas of the graphic data. The attribute processing function module group 5 performs attribute definition, attribute change, attribute reference, and the like. In the attribute definition, attribute data of the part is defined and registered in the attribute data file 2. In attribute modification, attribute data is rewritten. Attribute references refer to attribute data. The processing function module group 6 performs processing element definition, processing element editing, and the like. In the machining element definition, machining element data is defined and registered in the machining data file 3. In machining element editing, machining element data is edited. The language input processing section 8 inputs the language in which product information and the like are written, creates graphic data, and displays a blank layout diagram on the graphic display 15. A blank layout diagram is a figure in which multiple developed diagrams of a product are arranged. While looking at this blank layout diagram, the mold designer decides the processing position and contents on the mold plate, and the strip layout processing section 9 then
Create core shapes interactively. What is a core shape?
This is two-dimensional contour shape data that indicates what processing is to be performed at which stage. For example, in punching, it is the shape of the tip of a punch, and in bending, it is a shape that includes the part bent from the bending line. The mold design processing unit 10 automatically creates and stores attribute data based on the core geometry and auxiliary data (bending angle, notch depth, dowel depth, etc.), and furthermore, based on the attribute data, Automatically create and store assembly drawing/parts drawing data. If there are any problems with the diagram created here, you can correct them interactively. Modifications are made to attribute data. The processing information creation processing section 11 automatically creates and stores processing data for plate processing based on the attribute data. In the present invention, in order to enable processing with the above-mentioned configuration, the unit, that is, the concept of the horizontally divided design described earlier, has a functional unit structure (vertically divided).
It is characterized by being designed by a combination of. Unitization means standardizing the parts to be assembled on the movable side and the fixed side and their assembly conditions for each processing function (shown in Figure 1) provided as a progressive mold, and the cutting edge, which is a part that changes depending on the mold. Part information (shape representing the machining area called core shape,
In order to input sufficient auxiliary data to represent the processing content to be performed in that processing area (for example, the amount of clearance between the die and punch for punching, the bending angle for bending, etc.), and output the detailed dimensions of the component. It refers to the standardization of calculation formulas and procedures. By doing this, the designer can automate the work related to the structure, parts, and processing information necessary to realize the processing function by simply arranging the parts that change. FIG. 3 is a diagram showing a unitized punching die structure, and FIG. 4 is a diagram showing a unitized bending die structure. In Figure 3, 21 is a punch, 22 is a retainer, 23, 24, 27 and 28
is a set screw, 25 and 26 are nested pressers, 29 is a coil spring, 30 is an eject pin, 31 is a stripper nest, 32 is a die nest, PP is a punch plate, SB is a stripper back-up plate, and SP is a stripper・Plate, D.
P indicates die plate. Strippa Backup Plate SB and Strippa Backup Plate S.
P is connected by a set screw. In this unit, the stripper nest 31 is integrally connected to the stripper backup plate SB by a set screw 24, and the workpiece is set and held between the stripper plate SP and the die plate DP. Then, by operating the punch plate PP downward in the figure, the punch 21 punches the workpiece. The eject pin 30 is used to remove the remaining debris attached to the tip of the punch 21 downward through the hole of the die insert 32 when the punch 21 punches out the workpiece. Of the above configuration, the parts 23, 24, 27, 28, 29, and 30 are parts that do not change, and design information such as part drawings regarding these parts are registered in the form of fixed drawings or a CAD database. On the other hand, for parts that change, the dimensions of the parts are determined on a rolling basis based on the size of the area of the cutting edge shape. In other words, part 2
1 and 32 change depending on the size of the area of the contour shape to be punched here, the position and dimensions of part 31 change depending on the shape of the cutting edge of part 21, and part 2
The position and dimensions of the part 5 change depending on the shape of the part 31, and the position and dimensions of the part 26 change depending on the shape of the part 32. This situation will be described in more detail below. (1) Core figure representing the punching contour shape (Figure 5a)
is obtained as an output from the strip layout processing section 9 shown in FIG. Core figures are registered in the figure data file 1 shown in FIG. (2) Processing for embodying the unit is carried out in the mold design processing section 10 shown in FIG. First, information necessary for designing the component 32 (die nest) is defined as attribute data. Find the maximum and minimum XY coordinates of the core figure in term 1 (Figure 5b). The position (P _x , P _y ), width w, and depth d of a figure obtained by increasing the obtained maximum and minimum values by a are determined (Fig. 5c). Here, it is assumed that a is set in the system as a constant when calculating the outer shape of the nested die. Graphic data for a half line l1 that divides the graphic shown in FIG. This half line l
1 is then registered in the graphic data file 1 shown in FIG. Set the direction of the nest presser to be upward (+Y direction) (Fig. 5d). Create an attribute data area in the system work area, and store the nested XY data obtained above.
Write the position data (P _x , P _y ) on the plane, the width w and depth d of the nest, the pointer to the figure data file of the dividing line l1, and the symbol indicating the direction of the nest press, and at the same time set them as constants in the system. The nested height h and clearance amount are written in this attribute data.
Here, this attribute data is temporarily registered in the attribute data file 2 shown in FIG. A plate management table that manages the relationship between core shapes and die nests, punches, and stripper nests is provided in the common data area of the system, and a pointer to the attribute data file is set as item 1 in this plate management table. Register in the die nesting column regarding the core shape. (3) Information necessary for designing the part 26 (die nest holder) is defined as attribute data. The die attribute pointer related to the core figure of item 1 registered in the die/plate column of the plate management table is retrieved. Create each attribute data area for the die nest and die nest press in the system work area, use the pointer to retrieve the die attribute data from the attribute data file, and enter it into the die nest attribute data area. die nested attributes from within the data area.
Read the position data (P _x , P _y ) on the XY plane, the nest width w, depth d, height h, and a symbol indicating the direction of the nest press. The position data (P _x , P _y ), width w, depth d, and symbol data indicating the direction of the nest press are used to calculate the position (P _x , P _y ), width w, and depth d of the die nest press, and the die Write to the attribute data area of the nested presser. Add the height h data to the attribute data of the die nesting holder and write it. The attribute data of the die nesting presser is registered in the attribute data file 2 shown in FIG. A pointer to this attribute data file is registered in the die nesting press column related to the core figure in item 1 in the plate management table. (4) Information necessary for designing the part 21 (punch) is defined as attribute data. Find the maximum and minimum XY coordinates of the core figure in term 1 (Figure 5b). Consider a figure in which the obtained maximum and minimum values are increased by a, and find the position (P _x , P _y ), width w, and depth d (Figure 5c). Here, it is assumed that a is set in the system as a constant when calculating the outer shape of the punch. The direction of the punch press is determined to be upward (+Y direction) (Fig. 5d). Create an attribute data area in the system work area, and here the XY of the punch found above.
Write the position data (P _x , P _y ) on the plane, the punch width w, depth d, and symbols indicating the direction of the punch press, and at the same time write the punch height and round-up length that are set as constants in the system. l2, write the clearance amount to its attribute data. Here, this attribute data is temporarily registered in the attribute data file 2 shown in FIG. A pointer to this attribute data file is registered in the punch column related to the core figure in item 1 in the plate management table. (5) Information necessary for designing the part 22 (punch holder) is defined as attribute data. The punch attribute pointer related to the figure of item 1 registered in the punch column of the plate management table is retrieved. Create each attribute plate area for the punch and punch holder in the system work area, use the pointer to retrieve the punch attribute data from the attribute data file, and enter it into the punch attribute data area. Punch XY from within the punch attribute data area
The position data (P _x , P _y ) on the plane, the width w and depth d of the punch, and the symbol indicating the direction of the punch press are read. Position data (P _x , P _y ), width w, depth d, punch holder position (P _x , P _y ), width w, by symbolic data indicating the direction of the punch holder.
Calculate the depth d and write it in the attribute data area of the punch holder. The height h of the punch holder, which is set as a constant in the system, is added to the attribute data of the punch holder and written. The attribute data of the punch holder is registered in the attribute data file 2 shown in FIG. A pointer to this attribute data file is registered in the punch press column related to the core figure in item 1 in the plate management table. (6) Information necessary for designing the component 31 (stripper nest) is defined as attribute data. The die attribute pointer related to the core figure of item 1 registered in the die plate column of the plate management table is retrieved. Next, a stripper nested attribute data area is created in the work area of the system, and the above pointer is used to extract attribute data from the attribute data file and input into the stripper nested attribute data area. Rewrite the height h of the die nest in the stripper nest attribute data area to the height h of the stripper nest set as a constant in the system, and change the clearance amount of the die nest to the height h of the stripper nest set as a constant in the system. Rewrite to clearance amount. Create a punch attribute data area in the system work area and use the plate management table to
The punch attribute pointer for the core figure of item 1 registered in the punch plate column is taken out, and the attribute data is taken out from the attribute data file using this pointer and placed in the punch attribute data area. The symbols indicating the width w and depth d of the punch and the punch holding direction are extracted from the punch attribute data area and are additionally written in the stripper nested attribute data area. Here, this stripper nested attribute data is once registered in the attribute data file 2 shown in FIG. A pointer to this attribute data file is registered in the stripper nesting column for the core figure in item 1 in the plate management table. (7) Information necessary for designing the component 25 (stripper nesting retainer) is defined as attribute data. The stripper nest attribute pointer related to the core figure of item 1 registered in the stripper nest column of the plate management table is retrieved. Create each attribute data area for the stripper nest and the stripper nest holder in the work area of the system, use the pointer to retrieve the stripper nest attribute data from the attribute data file, and enter it into the stripper nest attribute data area. The position data (P _x , P _y ) of the stripper nest on the XY plane, the width w, depth d, and height h of the stripper nest, and the symbol indicating the direction of the stripper nest press are read from the stripper nest attribute data area. Calculate the position (P _x , P _y ), width w, and depth d of the stripper nest holder using the position data (P _x , P _y ), width w, depth d, and symbol data indicating the direction of the stripper nest holder,
Write to the attribute data area of the stripper nesting press. The data of the height h of the stripper nest is added to the attribute data and written as the data of the height h of the stripper nest retainer. The attribute data of the stripper nesting presser is registered in the attribute data file 2 shown in FIG. A pointer to this attribute data file is registered in the stripper nesting press column related to the core figure in item 1 in the plate management table. (8) Through the above processing, the design information of the parts that change is defined as attribute data. after this,
If necessary, parts drawings can be created based on this attribute data, and dimensions and positions can be changed. In addition, in the case of bending, a unit structure as shown in FIG. 4 is obtained. Here, the contour shape and bending angle of a rectangle including a bendable portion are designed as input information. Such shape information is the core figure, and these are standardized in an integrated manner, including the vertically divided functional unit structures and the processing of the plates to which they are assembled. An advantage of unitization is that it is possible to incorporate many different machining functions into the system compared to conventional CAD. For example, No. 4 and below shown in Fig. 1 were previously thought to be difficult, but can be easily incorporated. A mold can be automatically designed with just a small amount of input data (shape data for processing the product). For example, the third
In the punching process shown in the figure, the punching shape (contour shape data) alone is used to consistently produce everything from calculating the dimensions of the punch, die, presser plate, etc., to making the NC tape for drilling holes in each plate into which these parts will be incorporated. Can be done. Structures that have different know-how depending on the designer or manufacturer can be provided and utilized by multiple designers as a single model. Standardization of mold components can be promoted. etc. can be mentioned. A more specific example will be shown and explained below. The graphic definition of the graphic processing function module group 4 in Figure 2 reads and interprets statements such as the product information definition statement in the table, and performs intersection point calculations and tangent circle calculations to create graphic data or a collection of graphic data. It shall be defined and registered as . The graphic conversion of the graphic processing function module group 4 in Figure 2 reads the graphic data registered in the graphic database 1 in Figure 2, and uses the following formula: X=ax+cy+t _x Y=bx+dy+t _y (ad-bc=0). The displayed two-dimensional affine transformation is performed to move, rotate, and enlarge/reduce the X and Y coordinate values, which are then registered as new graphic data in the graphic database. The set operations of the graphic processing function module group 4 shown in FIG. 2 include sum operations, difference operations, etc.
A product operation is performed and this is registered in the graphic database as a new set of graphic data. An example of difference calculation between a rectangle and an inverted L shape is shown in FIGS. 6d and 6e. The development diagram of the graphic processing function module group 4 shown in FIG. 2 is created using the graphic data registered in the graphic database 1 shown in FIG. Figures are connected one after another to create a single developed diagram, and this is registered in the figure database as a new set of figure data. The offset processing of the graphic processing function module group 4 in FIG. 2 moves each line segment that constitutes the graphic data registered in the graphic database 1 in FIG. 2 by a certain amount to the inside or outside of the graphic. Create a new figure and register it as new figure data in the figure database. FIG. 6c shows an example of creating an inverted L-shaped offset figure. The garbage collection of the graphic processing function module group 4 in FIG. 2 finds unused graphic data registered in the graphic database 1 in FIG. This frees up the data area so that another figure can be registered. The attribute definition of the attribute processing function module group 5 in FIG.
Register to file. To change the attributes of the attribute processing function module group 5 in FIG. 2, take out the attribute data registered in the attribute data file 2 in FIG. Register. The attribute reference of the attribute processing function module group 5 in FIG. 2 reads the attribute data registered in the attribute data file 2 in FIG. The machining element definition of the machining function module group 6 in Figure 2 reads the attribute data registered in the attribute data file 2 in Figure 2, and creates machining data for plate machining based on this. ,
Register it in the processed data file 3 in FIG. To edit the machining elements of the machining function module group 6 in Fig. 2, read the machining data registered in the machining data file 3 in Fig. 2, change it interactively, and then edit the machining data file in Fig. 2 again. Register for 3. The product information 7 in FIG. 2 defines information on product drawings using shape definition statements, material definition statements, and the like. The shape definition statement defines and inputs a product, which is essentially a three-dimensional shape, using data expressing points, straight lines, arcs, contours, etc. as a collection of two-dimensional shapes. The material definition statement is data that indicates the thickness, width, material, shear coefficient, and bending constant of the material, which is a long thin plate. The attached table contains sentences for defining the figures in FIG.
Among these, PB10 = BLNK (SPM, 4.5, 224.0, 30.0, 0.35) is the material definition statement. The material according to this sentence is
SPM (polished steel strip), plate thickness 4.5, width 224, shear modulus
30, bending constant 0.35. The language input processing unit 8 in FIG. 2 reads the product information definition sentence defined in the product information 7, calls the graphic processing function module 4 in FIG. 2, interprets it, and registers it in the graphic database 1. , and sets necessary system constants to prepare for the next strip layout process 9. here,
After interpreting the definitions in the table and creating a figure as shown by the solid line in Figure 8, we connect 10 of them to create a figure like Figure 9a, and then create the graphic in Figure 2.
It is displayed and output to the display device 15. The strip layout processing section 9 in FIG.
A core figure is created from the figure created by the language input processing section 8 of FIG. 2 and displayed on the graphic display device 15 of FIG. FIG. 9b shows a partially enlarged view of FIG. 9a and how the core figure is defined there. The outline of the shaded part is created as a core figure and is a figure registered in the figure database. The line segments above and below it are created interactively on the graphic display device, and are auxiliary lines when creating the core figure. FIG. 9c is a diagram illustrating interactively defining the core figure in FIG. 9b. When line segments are designated on the screen in the order of line segments 1, 2, 3, 4, 5, and 6, these line segments are associated with line segments in the graphic database. And line segment 1
The intersection point of and 2 is calculated, first the end point of line segment 1 is replaced with this intersection point, and then the starting point of line segment 2 is replaced with this intersection point. Next, the intersection of line segments 3 and 4 is calculated, the end point of line segment 3 is replaced with this intersection point, and then the start point of line segment 4 is replaced with this intersection point. Similarly, line segments 4 and 5 and line segments 6 and 1 are also processed. In this way, a core figure is created and registered in the figure database. The mold design processing section 10 in FIG. 2 processes the core figure and auxiliary data (bending angle, Based on the notch depth, dowel depth, etc.)
It has the function of creating attribute data and registering it in the attribute database, and the function of creating assembly diagrams and parts diagrams from the attribute data created here. Also, if you see any problems with the assembly diagram created here, you can make corrections interactively. FIG. 5, FIG. 6, and FIG. 10 are diagrams for explaining the mold design process. FIG. 5a shows the core figure, FIG. 5b shows its area calculation, FIG. 5c shows the creation of a nested outline diagram, and FIG. 5D shows the creation of dividing lines. Figure 6a
Figure 6b shows the nested outline, Figure 6b shows the nested outline divided into two by the dividing line created in Figure 5d, and Figure 6c shows how the core shape is offset. Figure 6 d shows how to create a difference figure between the left figure divided in Figure 6 b and the offset figure in Figure 6 c, and Figure 6 e shows the right side divided in Figure 6 b. It shows how to create a difference figure between the figure and the offset figure in Figure 6c, and Figure 6f
Figure 6(d) and Figure 6(e) show how to attach a protruding part for attaching a nesting holder to the shape created in Figure 6(d) and Figure 6(e). An example is shown below. FIG. 10a shows a plurality of core figures created by the strip layout processing section 9 of FIG. 2 and displayed on the graphic display device 15 of FIG. In Figure 10b, when one of the shapes generated as a nested shape is interactively specified, a mark (ⓓ) indicating that the system has recognized that core shape is displayed, and the nested shape for that core shape is displayed. This shows that the image is generated and displayed on the graphic display device 15. In Figure 10c, one of the nested figures created in Figure 10b is indicated interactively, and a mark (ⓓ) is displayed to indicate that the system has recognized the nested figure, and the nested figure is pressed against the nested figure. is generated and displayed on the graphic display device 15. FIG. 10d is an enlarged view of the nested portion. Figure 10e is the 10th
It is a partially enlarged view of Figure d, l _I indicates the core shape,
l _p indicates the contour shape of the figure obtained by offsetting l _I. FIG. 11 is an outputted drawing of the nested parts designed in FIG. 10b. The side view of this drawing and the dimension lines in the drawing are automatically generated by the system. FIG. 12a shows an example of interactively creating a punch and a punch holder. Figure 12b is the 12th
It is a partially enlarged view of figure a. P in FIG. 12 indicates a punch, and S indicates a punch holder. The machining information creation processing section 11 in FIG. 2 creates machining data for plate machining based on the attribute data. The graphic utility shown in FIG. 2 is a group of subroutine programs for outputting and displaying two-dimensional figures and alphanumeric characters on a graphic display. The plot utility 13 in FIG. 2 is a group of subroutine programs for outputting and displaying two-dimensional figures and alphanumeric characters on a plotter. The plotter 14 shown in FIG. 2 is a device for printing out two-dimensional figures and alphanumeric characters on paper or the like. The graphic display 15 in FIG.
This is a device for displaying and outputting dimensional figures and alphanumeric characters. Attribute data is predetermined based on core shape data and auxiliary data (when information other than two-dimensional shape is required for processing, the system requests it and the operator inputs it in response). Automatically created by an algorithm. Attribute data includes all information for designing one part. For example, for a die insert for punching, the core shape, clearance (distance between the punch and die), and the position where the insert presser is attached (top, bottom, left,
Right) Position of the nest on the mold plate and external dimensions of the nest The nest is manufactured by dividing it into two parts, and this parting line data is included. FIG. 5 is a diagram illustrating an algorithm for generating attribute data. First, if there is a core figure with a two-dimensional punched contour shape as shown in Figure 5a, then Figure 5b
Find the maximum and minimum values of the XY coordinates as shown in . Next, the obtained boundary (rectangle) is increased by a certain predetermined value α. This is the outer shape of the nest. At the same time, the position (P _x , P _y ) of this rectangle is also determined (Figure 5c). Then, create a line segment l ₁ that vertically divides the rectangle found in Figure 5c into halves.
make. This will be the dividing line. Therefore, the position (direction) of the die nest presser is determined to be upward (Fig. 5d).
With the above algorithm, it is possible to create the attribute data of the die nesting for punching. Attribute data includes all information for designing one part. Using this data as a parameter, the system can create parametric drawings. FIG. 6 is a diagram illustrating an algorithm for creating assembly drawings and parts drawings. The algorithm will be explained below with reference to FIG. A rectangle is created by extracting the nested outline data (Figure 6a). Take out the dividing line and divide this rectangle into two pieces (Figure 6b). Take the core figure and create a figure offset by the clearance (Figure 6c). A difference calculation is performed between the offset figure and the left figure divided by the offset figure (Fig. 6d). The same calculation is performed for the figure on the right side divided by (Fig. 6e). Immediately add the stopper line l ₂ to the diagram obtained with . This becomes the die nest and assembly diagram (Fig. 6f). For the parts drawing, dimension lines are added to the figure obtained in step 3 to create a front view, and depth direction data is also extracted from the attribute data to create a side view (Fig. 6g). FIG. 7 is a diagram illustrating processing information. In order to assemble a certain unit with a mold, various holes must be formed in the mold plate. For example, processing information as shown in FIG. 7 can be automatically created based on the position of one unit and a group of attribute data corresponding to a group of parts constituting this unit. In Figure 7, A is the hole for assembling the punch, B is the set screw hole for the punch holder, C is the screw hole for fixing the stripper nesting holder, D is the hole through which the punch passes, E is the stripper nesting holder, and F is the stripper holder. Nesting, To indicates a nesting presser foot, Chi indicates a die nesting hole, Ri indicates a screw hole for securing the presser foot, Nu indicates a hole through which the scraps fall, and Ru indicates a punch. FIG. 8 is a diagram showing an example of a two-dimensional shape of a product created based on the definition sentence. The language input process involves interpreting and executing the definition statement (part program) shown below to create the two-dimensional shape of the product as shown in Figure 8, moving/copying it, and then proceeding to the next step. Send to strip layout design. Also,
At the same time, material information such as product material and plate thickness is also input. In addition, in the definition statement, PROF is the outline definition statement,
GRO indicates grouping, SFT indicates a statement that instructs movement of figures, BLNK indicates a definition statement regarding materials, and TRCE indicates a statement instructs copying of figures.
The table below shows the above definition statement (part program).

【table】

〔Effect of the invention〕

As is clear from the above description, according to the present invention, basic design data can be created and inputted while interacting with a computer by inputting data related to the product shape, and various design drawings and CN tapes for manufacturing can be created and input. etc. can be created automatically. Further, since changes and corrections are made in a consistent manner throughout the mold structure, design errors in progressive mold design can be prevented and the labor required for design can be reduced.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an example of processing functions provided in a progressive mold CAD system, Fig. 2 is a diagram showing the configuration of one embodiment of the present invention, Fig. 3 is a diagram showing a unitized punching die structure, Figure 4 shows the unitized bending die structure, Figure 5 explains the algorithm for generating attribute data, Figure 6 explains the algorithm for creating assembly diagrams and parts diagrams, and Figure 7 shows the processing information. Figure 8 is a diagram illustrating an example of a two-dimensional shape of a product created based on the definition statement; Figure 9 is a diagram explaining the strip layout design process;
FIG. 0 is a diagram for explaining core figure editing and assembly diagram design processing, FIG. 11 is a diagram for showing an example of die nested parts diagram output, and FIG. 12 is a diagram for explaining punch assembly diagram design processing. 1...Graphic data file, 2...Attribute data/
File, 3...Processing data file, 4...Graphic processing function module group, 5...Attribute processing function module group, 6...Processing process function module group, 7...Product information, 8...Language input processing section, 9...Strip...
Layout processing section, 10... Mold design processing section, 11
...Processing information creation processing section, 12...Graphics utility, 13...Protect utility, 1
4...Protector, 15...Graphic display, 21...Punch, 22...Retainer, 23,2
4, 27 and 28...set screw, 25 and 26...nest presser foot, 29...coil spring, 30...eject
Pin, 31... Stripper nest, 32... Die nest, PP... Punch plate, SB... Stripper backup plate, SP... Stripper plate, DP... Die plate.

Claims (1)

[Claims] 1 Input shape definition data such as points, straight lines, arcs, and contours obtained from the first product, and material definition data such as material thickness, width, material, shear coefficient, and bending constant as product information, and display them on the graphic display. This is an information processing method for progressive mold design in which progressive mold design is carried out in an interactive format, in which product information 7 is input, graphic data 1 is created, and a blank screen with a plurality of exploded views of the product arranged on the graphic display 15 is displayed. A language input processing means 8 for displaying a layout diagram, a strip layout processing means 9 for creating a core figure that defines processing on the stage in an interactive manner based on a blank layout diagram, a core figure, bending angle, and notch depth. A mold design processing means 10 that creates attribute data 2 such as dimensions and tolerances of parts based on auxiliary data such as dimensions, and automatically creates assembly drawing/parts drawing data based on the attribute data, and attributes. The mold design processing means 10 is equipped with processing information creation processing means 11 for creating processing data 3 for plate processing based on the data;
is an information processing method for progressive mold design, characterized in that it is configured so that assembly drawing/parts drawing data can be corrected by changing attribute data in an interactive manner.