JPH0115107B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a method for designing strips including bending based on unit machining data in progressive die design.
This invention relates to a strip layout diagram creation method in progressive mold design that creates layout diagrams.

[Conventional technology 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 (Computer 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 you can sequentially retrieve standard parts from a database and design on this plate. I do. This method is called horizontal design. In horizontal design, you can check inside the plate, but in order to create a completed mold, you have to perform operations to sequentially select, arrange, and modify shapes on the plate. It takes a lot of time.

It is a heavy burden on the designer to accurately represent the relationship in the vertical direction.

There are other problems. This is because conventional CAD systems have difficulty expressing vertical relationships.

A strip layout diagram is a transition diagram that defines the machining at each stage and shows what kind of machining is to be performed at which stage according to the flow of the machining process. Conventionally, creating a strip layout diagram
The designer drew them by hand based on a blank layout drawing. However, for complex products, this part accounts for more than 10% of the total design process, and there are many design errors.

[Purpose of the invention]

The present invention is based on the above considerations, and includes:
The object of the present invention is to provide a method for creating a strip layout diagram in progressive mold design, which can automatically create a strip layout diagram including bending based on unit processing shape data.

[Structure of the invention]

For this purpose, the strip layout diagram creation method in progressive mold design involves inputting unit machining shape data, material shape data, and feed pitch to create a strip layout diagram. It is a diagram creation method, which is a figure copying means that moves and copies machining shape figures other than the input bending figure by shifting them one after another in the feeding direction according to the position of the figure, and copying the figures on the same pitch or adjacent pitches. A two-dimensional figure set calculation means that performs a sum operation on the overlapping figures above and calculates a difference between the material figure and the figure obtained by performing the above sum operation, and extracts the input bending processed shape and performs the above set operation. Equipped with a bend calculation means that calculates bending with the figure obtained by the method, and creates a strip layout diagram including bending based on unit processing shape data, material shape data, and feed pitch. This feature is characterized in that it is configured so that it can be output.

[Embodiments of the invention]

Embodiments of the present invention will be described below 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 figure copying module, 2 is a two-dimensional figure set calculation module, 3 is a bending calculation module, 4 is a machining shape data input module, 5 is a shape data and feed pitch input module, and 6 is a copying module. Modules, 7 and 8 are sum figure calculation modules, 9 is difference figure calculation module, 1
0 is a bending calculation module, 11 is an output module, and 12 is a graphic data file. A figure copying module 1 moves and copies figures, and a two-dimensional figure set operation module 2 calculates the sum, difference, and product of two-dimensional figures. The bending calculation module 3 calculates intersections between two-dimensional figures, extracts all line segments included inside a certain figure, and performs coordinate transformation when bending a certain line segment using a rotation axis. or find the projection onto the original plane. The machining shape data input module 4 is
A bending angle is given to data of a two-dimensional figure indicating the shape to be processed and if there is a figure unit for the purpose of bending in this figure. The shape data and feed pitch input module 5 inputs a two-dimensional figure that defines the shape of the material. Also, input the feed pitch value on the mold. When the input processing shape figure is other than a bending figure, the copying module 6
The position of this figure is determined, and figures shifted one after another in the feeding direction are determined and stored in the figure data file 12. The sum figure operation module 7 performs a sum operation when there are overlapping figures on the same pitch, and the sum figure operation module 8 performs these sum operations when there is an overlap with figures on an adjacent pitch. The difference figure calculation module 9 performs a difference calculation between the raw figure and the output figure of the sum calculation module 8.
The arithmetic module 10 takes out a bending processing shape figure, and when there is an overlap with the difference figure arithmetic module 9, performs a bending operation with this. The output module 11 outputs graphics to a display or plotter.

In the present invention, by providing each of the above-mentioned modules, the following processing can be executed.

Input the unit machining shape data.

Key-in the feed pitch, plate dimensions, and plank width.

The figure is moved and copied in the feed direction based on the processing position of each unit.

If the shapes overlap in one stage (on the pitch), this sum shape is calculated.

In this way, the sum figure at all stages is found.

Using the sum figure calculated in , as input, calculate the sum figures of adjacent neighbors one after another.

Calculates the shape obtained by subtracting the output shape from the blank shape.

The intersection point with the bending shape is calculated for the output figure.

A figure is calculated by tilting the data of the part included in the bend by the bending angle from the intersection point. At this time, all data other than straight lines in the included portion are approximated to straight lines and then processed.

Output the output figure by XY plotter.

FIG. 3 is a diagram showing how a strip layout diagram is created. In FIG. 3a, the hatched figure represents the part to be punched at that stage (pitch). Therefore, this hatched figure is moved and copied in the feeding direction (leftward) (), and the sum figure at all stages is obtained (,). Figure 3b shows the output figure, and Figure 3c shows the figure obtained by performing a subtraction operation with the raw figure. Further bending was then performed (,) and the resulting figures are shown in Figures 3d and 3e.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a strip layout diagram including bending is automatically created using a copying module and various calculation modules based on unit processing shape data. Mistakes in creating the strip layout can be prevented, and furthermore, the labor required by the designer to create the strip layout can be significantly reduced.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an example of processing functions provided as a mold in a progressive mold CAD system, Fig. 2 is a diagram showing the configuration of one embodiment of the present invention, and Fig. 3 is a diagram showing a strip layout diagram created. FIG. 1... Shape copying module, 2... Two-dimensional figure set calculation module, 3... Bending calculation module, 4... Machining shape data input module,
5...Shape data and feed pitch input module,
6... Copy module, 7 and 8... Sum figure calculation module, 9... Difference figure calculation module, 10...
...Bending calculation module, 11...Output module, 12...Graphic data file.

Claims (1)

[Claims] 1. A strip layout diagram creation method in progressive mold design in which a strip layout diagram is created by inputting unit processing shape data and material shape data and feed pitch, except for input bending shapes. A figure copying means that moves and copies the machined shape figure by shifting it one after another in the feed direction according to the position of the figure, performs a sum operation of overlapping figures on the same pitch or adjacent pitches, and also performs a sum operation of overlapping figures on the same pitch or adjacent pitches, and also performs a sum operation on the material figure and the above A set calculation means for two-dimensional figures that performs a difference calculation with a figure obtained by performing a sum operation;
and a bending calculation means for extracting the input bending processing shape and calculating the bending with the figure obtained by the set calculation means, which calculates the unit processing shape data, the material shape data, and the feed pitch. A strip layout diagram creation method for progressive die design, characterized in that it is configured to create and output a strip layout diagram including bending based on the .