JPH0225905A - Setting method for height of working start surface - Google Patents

Abstract

PURPOSE:To easily designate the height of a working start surface by defining the bottom surface of a pocket or the top of an island of a 1st form as the working start height of a 2nd form in case the master-slave relation is designated between the pocket-shaped or island-shaped 1st form and the 2nd form. CONSTITUTION:When the master-slave relation is designated between a pocket- shaped 1st form 1 and a 2nd form 2, the height of the pocket surface of the 1st form 1 is defined as the working start surface PSH of the 2nd form 2. If the form 1 has an island shape, the height of the island top is defined as the height of the PSH of the form 2. Therefore it is not required each time to check the height of the pocket bottom surface or the island top nor to perform the key input operation in the numerical value. Furthermore the independent correction is not needed for the height of the PSH of the form 2 in case the island top or the pocket bottom of the form 1 is corrected. Thus the height of the PSH can be easily designated.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for setting the machining start surface height when designing mold parts such as cavities and cores using a mold CAD/CAM system. The present invention relates to a method for setting the height of a machining start surface of a second shape when defining a pocket-like second shape in an island-like or pocket-like first shape portion.

<Prior art> A progressive die or a molding die is composed of multiple plates, and several press punches (progressive die) or cavities/cores, runners/gates, water holes, etc.
A mold (as described above) is provided, and each plate is fixed with mounting bolts and other parts.

In the design using such a mold CAD/CAM system, for example, in the design of a mold, the following steps (input of the planar shape and cross-sectional shape of aLJ1 product) are conventionally performed.

(b) Layout design, such as whether to use one or two cavities, (c) Design of the mold base, that is, the mold itself.

(d) In accordance with the N C data creation, predetermined dialogue screens are sequentially displayed on the display screen, and the necessary data is input by operating the keyboard and tablet device according to the dialogue screen of each step, and the final input data is All data obtained is used to create NG data for mold processing. Furthermore, step (c)
In the design of the mold base.

(i) Plate design including plate size, number, thickness, etc. 5 (it) Cavity core design, (in) Runner gate design, (Soup) Water hole design, (v) Parts design be exposed. Note that one part includes a core nest and a cavity nest that are attached to the plate. The component design of the core insert and the cavity insert is performed by specifying the type of component processing (pocket processing, etc.) and inputting the processing shape.

By the way, in a component design in which the first shape and the second shape are defined independently, a pocket-like second shape may be defined in an island-like or pocket-like first shape portion. In such a case, the machining start surface of the second shape is set by specifying the distance 11 (height) from the reference surface. For example, if the first shape is an island shape, the machining start surface height of the second shape is the height of the top of the island, and if the first shape is a pocket shape, the height of the processing start surface of the second shape is specified as the height of the top of the island, and if the first shape is a pocket shape, the height of the processing start surface of the second shape is specified as the height of the top of the island. Specify the height of

<Problem to be solved by the invention> However, the conventional method of setting the height of the machining start surface requires checking the height of the top of the island of the first shape and the height of the bottom of the pocket each time and inputting numerical values manually. However, there is a problem in that it takes time to specify the height of the machining start surface. Also, in connection with the modification when the top of the island or the bottom of the pocket of the first shape is modified.

The height of the machining start surface of the second shape must also be corrected separately, which poses a problem in that the correction work takes a lot of time.

In light of the above, an object of the present invention is to provide a method for specifying the height of a machining start surface, which makes it easy to specify the height of the machining start surface, and also allows automatic modification of the related machining shape.

〈Means for solving problems〉 FIG. 1 is a schematic explanatory diagram of the present invention.

1 is the first shape, 2 is the second shape, and p S H is the processing start surface of the second shape.

Effect> When a parent-child relationship is specified between the first shape 1 and the second shape 2, the first shape 1 has a pocket shape and is
a)), the height of the bottom of the pocket is the height of the processing start surface PSH of the second shape 2, and if the first shape 1 is island-like (Fig. 1 (b)), the height of the top of the island is is the height of the processing start surface PSH of the second shape 2.

<Example> FIG. 2 is a block diagram of an apparatus implementing the invention.

11a is a processor, llb is a ROM, 1'lc is an RA
M, 12 is a graphic display device, 13 is a tablet device, 14a is a keyboard, 14b is an X-Y plotter, 14C is a floppy drive, FLD is a floppy disk, 15 is various data files for mold design and automatically created. This is a large-capacity storage M that stores NC information and the like.

In the tablet device 13, 13a is a tablet surface;
13b is a menu table, and 13e is a tablet cursor. A menu table 13b is pasted on the tablet surface 13a, and various items and data can be input by picking predetermined items written on the menu table 13b with the tablet cursor 13C.

Figure 3 is a detailed diagram of a part of this menu, and the "Processing Definition" item TMK and [Modification j item TMS, etc. are provided for cavity core design in mold base design. FIG. 4(b) is a flowchart of the machining shape definition process including the machining start surface height setting method according to the invention;
1 is a flowchart of a modification method after defining a machining shape according to the present invention. Below, we will explain the process of defining a j-shape (or island shape) in the nest (core) and defining a pocket shape in the corresponding hindlimb shape according to the flowchart in FIG. 4(a). The process of modifying the defined machining shape will be explained along the flowchart in (b).

A. Machining Shape Definition Process In the machining shape definition process, it is assumed that the design of the mold has already progressed and the display screen CRT has become an interactive screen for designing a nested part for the core. Further, it is assumed that the machining shape definition of the L stage pocket (or island) which is the first shape in the core to be machined has already been completed, and the machining shape data of the first stage pocket (or island) is stored in the RAM 11c. . FIG. 5 is an example of a dialogue screen in such a state, in which the planar shape PLV and cross-sectional shape SCV of the core COR are drawn on the display screen CRT, and the contour shape 1a of the defined first-stage pocket is drawn on the planar shape PLV. , a bottom surface 1b having a machining depth hl is drawn in the cross-sectional shape SCv with the core COR upper surface UP as a reference.

When defining the shape of the two-tiered pocket using the dialog screen (Fig. 5), the operator selects the menu table 13b shown in Fig. 3.
Pick the "Processing Definition" item TMK from among them. Then, in the input data display area 1) IM shown in FIG. 6, "Process" and "Processing name J, rTEJ.

Items such as "rcEJ, r shape type" are displayed. Therefore.

Enter "pocket processing" in "processing process" for the corresponding item,
Enter "2 pockets" in "Processing name", enter the slope amount rOJ in "TE", and enter the offset amount "OJ" in rCEJ.
” and input the initial data of the processing definition (step 101). Then, the dialog screen shown in Figure 7 will appear, and the input data for each item will be displayed in the input data display area DIM, and the two-tier pocket will be displayed. A question M1 for specifying whether the input reference surface is the upper surface or the lower surface of the core COH is displayed.

Therefore, the human power reference plane is specified according to the question sentence M1.

Note that if the gradient amount is "0", the "top surface of the shape" is specified (step 102).

When the input reference surface is specified, a question M2 (FIG. 8) for selecting a method for creating a processed shape is displayed. Question text M
2, if you select ``Standard Shape Manual J'', by selecting a predetermined standard shape from among standard pocket machining patterns such as square, rectangle, 1 circle, etc., a question text for inputting the shape according to your selection will be displayed, and the question will be displayed. Input the contour shape data according to the sentence. Figure 9 (a) is question sentence M3 when rectangle is selected in "Input of standard shape". It is specified by inputting R. In addition, if you select "Input arbitrary shape", the question becomes M4 (Fig. 9(b)) with element symbols, and the arrow keys (↑, →, ↓, ←, etc.) provided on the keyboard 14a are used. A contour shape is created by inputting a shape element through operation and inputting a numerical value for specifying the shape element. or,"
If you select ``Input of Shape Usage,'' question text M5 (Figure 9 (
C)), and the contour shape is specified using the already defined processing shape and product shape. Figure 10(a) shows question M6 that specifies the contour shape using the machining shape, and the first
0 (b) shows a question M7 that specifies the contour shape using the product shape, and the question M6. In response to M7, the processing shape or product shape to be used is specified from the already defined shape data (steps 103 and 104).

As a result, the contour shape 2a of the two-stage pocket (Fig. 11 (
When a)) is specified, a question M8 asking about the parent shape (the shape that becomes the reference for the machining start surface) is displayed, so the operator specifies the parent shape. For example, if the processed shape of the first-stage pocket is to be a rough shape, the outline shape 1a of the first-stage pocket is picked. Incidentally, if the first shape is an island shape, the outline shape 1a' is picked since the dialog screen shown in FIG. 11(b) has been drawn through the above processing (step 105). Then, processor lla selects the first shape (1
(processed shape of step pocket or island) and the second shape being created (
A parent-child relationship is defined for the machining shape of a two-stage pocket or an island pocket (a pointer for specifying the child machining shape data is stored in the machining shape data of the parent), and
The processed shape of a first-stage pocket (thick solid line in FIG. 12(a)) or the processed shape of an island (thick solid line in FIG. 12(b)) is drawn in different colors.

Next, the operator inputs the height of the machining start surface of the second shape of the two-stage pocket or island pocket by pressing the "NL" key, or inputs the distance from the input reference plane UP using a predetermined value as before. (Step 106). Then, the processor lla determines whether a numerical value has been input (Step 107). If a numerical value has been input, the input numerical value is set as the height of the machining start surface and the processing is performed in Step 1.
08), the processing from step 112 onwards is performed.

On the other hand, if it is determined in step 107 that a numerical value is not input, that is, if the rNLJ key is pressed.

Step 109) to determine whether the type of the first parent shape is a pocket shape or an island shape. If the first shape is a pocket shape, the bottom surface 1b of the pocket is The height is memorized as the machining start surface PSH and the processes from step 110) and step 112 onward are performed.On the other hand, if the first shape is an island shape, the top IC of the island is machined into the second shape (pocket). Its height is stored as the starting plane PSH (step 111).

Next, the machining depth of the second shape is input from the machining start surface PSH (step 112). Then, if the first shape is a pocket shape, the machining depth h2 is input from the first stage pocket bottom surface 1b.
If the bottom surface 2b of the two-stage pocket (FIG. 13(a)) is drawn, and the first shape is island-like, the bottom surface 2c of the pocket with a machining depth h2 from the top IC of the island (FIG. 13(b)) is drawn. ))
is drawn.

Note that even if the height of the machining start surface is numerically input in step 106, the bottom surface of the pocket is drawn as in the conventional method by inputting the machining depth, and the machining shape definition process ends. In addition, the NG data for the second shape machining is created by taking into account the height of the machining start surface PSH, 6B, and checking the machining shape of the core created in the machining shape definition process that is higher than the correction process. In the cross-sectional shape of the core COH shown in FIG. 14, if it is desired to modify the bottom surface 1b of the first-stage pocket to the bottom surface 1b' shown by the broken line, the following modification process is performed.

That is, the operator picks the "modify" item TMS from the menu table 13b shown in FIG. 2 (step 20).
1) Then, the processor lla displays the dialog screen of the shape modification mode and a question asking about the machining shape and shape elements to be modified. ), then pick the shape element to be modified (for example, the bottom surface 1b) (step 202), then change the bottom surface 1b to 1b'
When inputting data for modifying the machining depth (data for modifying the machining depth hi to h1') (step 203), the processor lla performs processing to modify the machining shape of the picked first-stage pocket, that is, the bottom surface 1b of the first-stage pocket Bottom surface 1b'
(step 204).

Next, the processor lla determines whether there is a machining shape that has a parent-child relationship with the picked machining shape of the first-stage pocket, in other words, whether the machining shape data of the first-stage pocket includes a pointer indicating a "child". Judgment step 205
), if there is no processed shape in a parent-child relationship, step 20
Perform the processing from 8 onwards. on the other hand,! If there is a machining shape of a child that has a child quantity relationship, it is then determined whether the modification in step 204 changes the machining start surface position (height) of the child, that is, it is linked to the modification of the parent. It is determined whether the shape element of child C should be modified (step 206), and if there is no child shape element to be modified in conjunction, the processes from step 208 onwards are performed. On the other hand, if there is a child shape element to be modified in conjunction with the modification of the parent, that is, if the bottom surface of the first-stage pocket modified in step 204 changes the machining start surface of the second-stage pocket, Step 207: Modify the height of the machining start surface in the machining shape data of the second stage pocket to hL.
), repeating the process from step 206 onwards, and.

In step 206, if all the interlocking shape elements have been modified, the modification results are displayed on the display screen CRT (FIG. 15, step 208).

Finish the correction process.

Note that although the modification process when the parent shape is pocket-shaped has been described above, the modification process is performed similarly when the parent shape is island-shaped. That is, if there is a child shape element to be modified in conjunction with the modification of the parent in step 206, that is, step 20
If the top of the island corrected in step 4 changes the machining start surface of the pocket of the second shape, the height of the machining start surface in the machining shape data of the pocket is corrected to the top of the corrected island. do.

<Effects of the Invention> According to the present invention, when a parent-child relationship is specified between a first shape and a second shape, if the first shape is pocket-shaped, the bottom surface of the pocket is The height of the machining start surface of the shape is set as the height of the machining start surface of the shape, and if the first shape is island-like, the top of the island is set as the height of the machining start surface of the second shape, so it is easy to specify the height of the machining start surface. In addition, related machining shapes can be automatically corrected, and as a result, the operability of defining machining shapes can be improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of the present invention. FIG. 2 is a block diagram of an apparatus implementing the present invention, and FIG. 3 is a partially detailed diagram of a tablet menu of the present invention. FIG. 4(a) is a flowchart of machining shape definition processing including machining start surface height setting processing of the present invention, FIG. 4(b) is a flowchart of correction processing of the present invention, and FIGS. 5 to 13 are flowcharts of the present invention. An example of a dialog screen for explaining the machining shape definition process of the invention. FIGS. 14 and 15 are explanatory diagrams of the correction process of the invention. 11a...processor, 11b-fist ROM, llc...RAM, 12...graphic display device, 13...
tablet device. 14a...Keyboard. PSH... Machining start surface height Patent applicant Fanuc Co., Ltd. Agent Patent attorney Chiki Saito Figure 1 (a) 2 --- v to z 721] Eng) O (PSH-11 Machining WA Kumenjima Figure 1 (b) Figure 3 TMK M3 Figure 4 (b) Figure 5 Figure 6 Figure 9 Figure (0) Figure 9 (b) Figure 9 (C) Figure 10 (a) Figure 10 Figure (b) No.

Claims (1)

[Claims] In a method for setting the machining start surface height of a second shape when defining a pocket-like second shape in an island-like or pocket-like first shape, When a parent-child relationship is specified between the second shape and the first shape is a pocket shape, the bottom of the pocket is the height of the machining start surface of the second shape, and even if the first shape is an island shape. For example, a machining start surface height setting method characterized in that the top of the island is set as the machining start surface height of the second shape.