JPH02195405A - Method for forming bent punch data - Google Patents

Abstract

PURPOSE:To obtain exact punch bending work information by utilizing already defined bent product shape information. CONSTITUTION:When a bent punch is selected from a menu table 6b and a punch shape 20 is specified by a cursor 6c, a CPU 1 stores the punch shape, a wire cutting start point and an approach element in a RAM 3. Then, the CPU 1 plots a project shape F, the XY plane A of the punch 20, the plane B of a bent line (L) direction (b), the vertical plane C of the bent line L, the plate layer lines P1 to P5 of a die, and punch sidelines 21 to 24. A punch reference face 25, a bent line position 26 and a bending direction are specified by the cursor based upon the plane B and a bent direction is inputted by a keyboard 4. At the time of registering the planes B, C by a tablet when the planes B, C are required one, they are stored in the RAM 3 as punch work information. In said constitution, the bent punch shape appropriate for a die can be obtained, the bent angle also can be exactly inputted as a numeral and the exact bent face working information can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for creating bending punch shape data in progressive feed, press mold CAD/CAM systems, and the like.

Conventional technology When drawing a bending punch shape in a CAD system, etc., the first method conventionally used is to draw three orthographic views (XY plane, Z× plane, YZ plane) of the product having the bending shape, or two 115 plane views (XY plane, ZX plane) are drawn on the graphic display screen, and a bending punch shape is drawn in accordance with the drawn bending shape of the product.

For example, FIGS. 7(a) to (d) are examples of how to draw this bending punch shape. As shown in FIG. 7(a), the XY Draw the plan view F1.ZX plan view F2 and draw the bending lines.

Next, as shown in FIG. 7(b) on the Z x plan view F2 of a plane perpendicular to the bending line, a diagram of the bent product is drawn to define the shape, and then, as shown in FIG. As shown in C),
In accordance with the bending shape of this zX plan view F2,
Define and draw the shape of 1. Then, as shown in FIG. 7(d), the punch shape 20 is drawn in accordance with the bending line and bending plane of the XY plan view F1 and the ZX plan view F2.

Problems to be Solved by the Invention As mentioned above, in the conventional method of creating a bending punch shape, the bending punch shape is simply drawn and drawn on a graphic display screen, and this bending bump shape is processed by wire cutting, etc. No processing data is created for this purpose.

In addition, since the bending punch shape is drawn with reference to the bending diagram of the product shape (ZX plan view F2), the bending angle etc. are not accurate values, and information regarding the machining of the bending surface of this bending punch cannot be obtained. do not have.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a bending punch data creation method for obtaining bending punch processing data using bent product shape data.

Means for Solving the Problems The present invention has solved the above problems by using the already defined bent and unfolded product shape and the plate layer lines of the mold of the product through the following steps.

Draw a plan view of the product shape that has already been bent and developed on the graphic display screen, create and draw a bending bump shape that matches the bending line, and then specify the wire cut start point and the above element to punch the bending punch. The first step of obtaining NC processing data for wire cutting processing was to draw at least the plate layer line of the product mold seen from the direction parallel to the bending line in the above plan view and the side line of the bending punch drawn in the above plan view. A second step of drawing a plan view, on the plan view drawn in the second step, setting the bending direction of the bending line (ff device 2) of the bending punch and numerically setting the bending angle. The third step is to obtain information on bending surface processing.

The bending punch shape is created according to the bending line and product shape drawn on the plan view of the developed product shape.
It is easy to create a bent bang shape, and by specifying the wire cut start point and approach element for the punch shape created on this plan view,
NC processing data for wire-cutting the bending punch can be obtained. Furthermore, a plan view (side view) is drawn in which the plate layer line of the product mold seen from the direction parallel to the bending line and the side line of the bending punch drawn in the above plan view are drawn, and this plate layer line and the side line of the bending punch are drawn. By setting the reference plane 1 bending line position 1 bending direction of the bending punch using , and inputting the bending angle numerically, you can obtain a bending punch shape that matches the product mold, and also set the bending angle. Accurate value data can be obtained by inputting numerical values, and accurate information for processing the bending surface can also be obtained.

Embodiment FIG. 2 is a block diagram of an automatic programming device of an embodiment of a CAD/CAM system implementing the present invention.

In Figure 2, 1 is a processor (CPU), 2 is a ROM in which a program for controlling the automatic programming device is stored, 3 is a RAM in which defined product shape data and various system programs are stored, and 4 is a keyboard. , 5 is a graphic display (hereinafter referred to as CRT), 6 is a tablet device, 7 is a disk controller, 8 is a floppy disk, 9 is a plotter for outputting the created drawings, and 10 is a printer, and these elements are connected to a bus 11. It is connected.

The tablet device 6 has a menu table 6b on the tablet surface 6a.
, and various items and data can be entered by clicking on a predetermined item on the menu table 6b with the tablet cursor 6C.

Note that the configuration of the automatic programming device described above is well known, and details thereof will be omitted.

FIG. 1 is an operation processing flowchart in one embodiment of the present invention, and FIGS. 3 to 6 are CR
It is an explanatory view showing an example of T screen display.

First, the product shape data, which has already been bent and developed using a method similar to the conventional method, is transferred to the RA of the automatic programming device.
Assume that it is stored in M3. Therefore, draw the product shape on the screen of the CRT 5, use the tablet cursor 6C to select the "Shape/Create" item on the tablet menu table 6b from the tablet device 6, and then use the tablet cursor 6c etc. to draw the shape of the bending punch. create.

For example, suppose that an XY plan view of the product shape is drawn on the screen of the CRT 5 as shown in FIG. (Omitted as it has nothing to do with these floor plans)
,,At this time, as shown in Fig. 4, a plan view of the bending punch is created by aligning the bump shape 2o with the bending line, and
3 as bump shape data. Furthermore, if there is another bent shape, a bump shape 20 that matches the bent shape is created.

Next, when the item "bending bump" is checked from the tablet menu table 6b, the processor 1 starts the process shown in FIG. 1, and first monitors whether or not a bending punch shape has been specified. Bending punch shape 20 that the operator wants to process
is specified with a graphic cursor that moves on the CRT screen by operating the tablet cursor 6C (step S1), the processor 1 then determines the wire cut start point, which is the processing start point when wire cutting the bending bump, and the wire From the cut star point,
First, approach element (
It is monitored whether or not one side of the punch shape in the XY plan view has been specified. Therefore, when the operator determines the wire cut start point and the approach element using the graphic cursor, step S2), Processera+11
are the punch shape (shape in the XY plan view) and wire cut start point for performing these punching operations.

The approach elements are stored in the RAM 3 as NC machining data.

Next, as shown in FIG. Plate layer lines and punch-shaped side lines of the product mold as seen from the direction are drawn (step S3). In FIG. 5, △ is an XY plan view of the product shape F and the bump shape 20, B is a plan view from the side parallel to the bending line in the XY plan view, and C
is a plan view seen from direction C perpendicular to the bending line, and Pl
, P2 indicates the lower mold plate, P3 to P5 indicate the upper mold plate 1-, and plate layer lines formed by these plates are drawn on the screen of the CRT 5. Furthermore, each direction is shown in these plan views B and C.

Side lines 21 to 24 of the punch shape 20 viewed from C are drawn.

Next, the operator, based on the drawn plan view B,
Specify the reference plane 25 of the bending punch and the position 26 of the bending line using the reference plane as the origin by operating the tablet cursor and moving the graphic cursor, and specify the bending direction on the CRT screen by operating the tablet cursor 6C. Specify it with the moving graphic cursor, and enter the bending angle using the keyboard 4. When the reference plane 251 of these bending punches 26 bending direction 0 bending angle is input (step S4), the processor 1 first converts the plan view B seen from the direction of the bending line into FIG. Based on this plan view B, a plan view C viewed from a direction C perpendicular to the bending line is drawn as shown in FIG.

The operator views the top view A and side views (B, C) of the bump shape 20 drawn on the CRT screen as 1! If there is an error and you need to set it again, send the erase command to the tablet 6.
1: Input (step S6) and repeat the process from step 83 onwards.

Let 1 do it. Further, if the bump shape 20 is a desired shape and the operator inputs a recording command from the tablet 6 (step S6), the processor 1 executes step 81.8.
Bump shape set in 2.

Wire cut start point, approach element, and reference plane 25 set in step S4. The bending line position 269 bending direction 9 bending angle with respect to the reference plane is stored in RAMa as punching data (step S7), and the creation of punching data is completed.

Then, when the bending punch data output command is input,
Brochure 1 outputs bending punch data to floppy disk 8 via disk controller 7.

In this example, as shown in FIG. 6, three plan views are used: a plan view A of the product shape and punch shape, a plan view B viewed from the direction of the bending line, and a plan view C viewed from the direction perpendicular to the bending line. is drawn on the CRT screen, but a plan view viewed from a direction perpendicular to the bending line] is not necessarily required, and the plan view Δ in FIG.

Only B may be drawn.

Furthermore, in the present invention, the bending line of the xY plan view in which the product shape is drawn does not have to be parallel to the X and Y axes of the XY plan view. That is, a plan view of the punch shape is drawn on the XY plan view on which the product shape is drawn, and a plan view of the punch shape viewed from the direction of the bending line, that is, a side view of the punch shape is drawn. Therefore, the bending line L lt does not have to be parallel to each coordinate axis of the drawn plan view.

Effects of the Invention In the present invention, a plan view of the punch shape is created by matching the bending line of the plan view of the product shape that has been bent and developed, and then a plan view (side view) of the punch shape as viewed from at least the direction of the bending line is created. This has the effect of making it easier to understand the punch shape, and also allows you to obtain NC data for wire-cutting the punch.
The bending surface machining data for the punch is also obtained by creating a pi-pange shape that matches the plate of the product's mold, so it is accurate and free of errors.Also, the bending angle is entered numerically. From this, data for accurate < 1 punch bending surface machining can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a flowchart of dynamic fl processing performed by an embodiment of the present invention, FIG. 2 is a block diagram of main parts of an automatic programming device of an embodiment of the present invention, and FIGS. 3 to 6 are the same. An explanatory diagram showing an example of CRT screen display in the embodiment,
FIGS. 7(a) to 7(d) are explanatory diagrams showing examples of conventional punch shape drawing. 20...Punch shape, F, Fl, F2...Product shape, [-...Bending line, P1-P5...Plate, 25
...Punch reference plane, 26...Bending line position. Figure No.

Claims (1)

[Claims] In a press mold CAD/CAM system, the following first
The bending punch data creation method consists of the third step: Draw a plan view of the already defined bent product shape on the graphic display screen, create and draw the bending punch shape according to the bending line, and then start wire cutting. A first step of obtaining NC machining data for wire-cutting a bending punch by specifying points and approach elements; A second step of drawing a plan view with side lines of the bending punch drawn in the above, and setting the reference plane of the bending punch, the position of the bending line, and the bending direction on the plan view drawn in the second step. The third step is to obtain information on the bending surface processing of the punch by numerically setting the bending angle.