JPH06277769A - Method for arranging tool on working graphic - Google Patents

Abstract

PURPOSE:To suitably arrange a tool corresponding to a kind of line or a post process. CONSTITUTION:The method contains a preparing process S1 preliminarily setting a tool arranging method by each kind of line, a line kind judging process S2, and a tool arranging process S3 dealing with the line kind. In the preparing process S1, a line kind of a graphic (a) for punching is classified in three kinds of a profile working line LA, an inside sheet punching line LB and a sheet peripheral part punching line LC, each tool arranging method is preliminarily set by each line kind LA to LC. In the line kind judging process S2, to which line kind among three kinds LA to LC the working graphic (a) corresponds is judged by including a prescribed post working data. The prescribed post working data shows, for example, a working that the work is cut down with punching or shearing. In the tool arranging process S3, the tool arrangement is executed on the working graphic (a) following the set tool arranging method corresponding to the judged line kind LA to LC.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for arranging tools on machining figure data applied to a CAD / CAM system such as a punch press.

[0002]

2. Description of the Related Art A CAD / CAM system for punch press generally performs processing in the order shown in FIGS. 6 (A) to 6 (E). That is, a CAD drawing of a product drawing is input (A), a development drawing is generated (B), planing is performed (C), tool placement is performed (D), and NC data is output to a file (E). Conventionally, various methods have been proposed and realized as the above-mentioned (D) tool placement automation method.

[0003]

However, since the tool placement is done without considering the post-process and the line type in all cases, the result of the assignment is unsatisfactory, and it takes time and effort to correct it by the operator's input. ing.

For example, as an inappropriate example of the automatic tool placement result, the cases shown in FIGS. 7 and 8 have occurred. That is,
As shown in FIG. 7 (A), from the workpiece W to the processed figure a
When punching the concave part a1 of the
There may be a case where the tool is arranged so that the portion to be shot down by 1 is machined along the contour with the small tool T2 as shown in FIG. In the case where the tools are arranged in this way, the slag Wa remains inside the recessed portion a1 when the cutting tool is cut along the cutting line K with a shearing machine or the like as shown in FIG. If the slag Wa remains in this way, it becomes necessary to discharge the slag Wa, which lowers the processing efficiency and makes it impossible to cope with the automatic slag discharge.

Further, as shown in FIG. 8 (A), the work W
When performing the punching along the edge of the tool, the place where the tool should be arranged as the punching of the tool T3 plural times is regarded as the punching in the plate as shown in FIG. One long-angle tool T4 may be arranged. However, such a long-angle tool T4 is
When the tool is arranged in the work binding portion such that the longitudinal direction is along the edge of the work W as shown in FIG. The work W may be displaced and the machining accuracy may be reduced. In the tool arrangement shown in FIG. 8A, both the edge processing and the plate dropping processing can be performed without any trouble, but the punching operation needs to be performed a plurality of times, resulting in poor machining efficiency. For this reason, in the case of down-cutting in the plate, it is desirable to carry out processing with one tool T4 as shown in FIG. 8 (B).

As described above, depending on the wire type, the tool may be damaged,
The best processing methods differ from the viewpoints of processing efficiency and utilization of material area. However, the conventional automatic tool placement method often cannot provide the best tool placement as described above.

An object of the present invention is to provide a method for arranging tools on machined figure data which enables appropriate tool arrangement according to the line type and the post-process.

[0008]

The method of the present invention will be described with reference to FIG. 1 corresponding to an embodiment. This tool placement method is a preparatory process (S1) of presetting the tool placement method for each line type.
And a line type determination process (S2) and a tool placement process corresponding to the line type (S3). The preparation process (S1)
Is the line type of the figure (a) for punching, which is classified into three types, a contour processing line (LA), a plate down line (LB), and a plate edge down line (LC). Species (LA) ~ (L
This is a process of presetting the tool placement method separately for C). The line type determination step (S2) is a step of determining which line type (LA) to (LC) the processed figure (a) corresponds to, including the predetermined post-process data. Is. The predetermined post-process data is, for example, a process of cutting off a work by punching or shearing. In the tool placement step (S3), the tool placement method corresponding to the determined line types (LA) to (LC) is selected from the above-mentioned three types of tool placement methods, and the tool is added to the machining figure (a) according to the method. This is the process of placement.

[0009]

There are various kinds of punch press working, and as the types of working lines, the above-mentioned contour working line (LA), plate mid-line down line (LB), and plate edge down line (LC) are used. Of 3
It can be roughly classified into types, and the appropriate tool arrangement differs depending on the line types (LA) to (LC). Therefore, like the method of the present invention, a tool placement method is set in advance for each of the three types of line types (LA) to (LC) described above, and the tool placement is performed by selecting the corresponding tool placement method. , Proper tool placement is possible. Also, the work that has been punch-pressed is
As a post-process, there are cases where cutting is performed by a shearing machine, or after a part of one work is punched, the work is separated by punching and the remaining work is punched. In the line type determination process (S2), line types (LA) to (L
C) is determined. Therefore, a more appropriate tool arrangement can be performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a conceptual configuration diagram of an automatic tool placement device that employs the tool placement method of this embodiment. This automatic tool placement device is constituted by a part of an automatic programming device consisting of a computer system, and has line type tool splitting method setting means 1, machining figure data file 2, back process data storage section 3, line type determining means 4, tool. An automatic allocation means 6 and a tool placement data file 7 are provided. The function of each component will be described later together with the tool placement method.

Next, the tool placement method of this embodiment will be described with reference to FIG.
It will be described together with the flowchart of FIG. First, as a preparation process, that is, as a software manufacturing process of the automatic tool placement device,
The line types of the figure for punching are classified into three types, a contour processing line LA, a plate down line LB, and a plate edge down line LC, and the tool placement methods M1 to M1 are classified according to each line type LA to LC. M
3 is determined and registered in the line type tool splitting method setting means 1 (FIG. 2) including a predetermined storage area (step S1).

As shown in FIG. 3 (A), the contour machining line LA is a line for punching out the contour when punching a product of the machining shape a from the work W, that is, a large number of tools along the machining shape a. It is a line that is sequentially arranged. A shaded area T in the figure indicates an area where tools are arranged side by side. As shown in FIG. 2B, the plate down line LB indicates a line that drops down the region T in the middle part of the work W when punching a product of the work shape a from the work W. The plate edge down line LC is
As shown in (C) of the same figure, it is a line that strikes down the region T applied to the edge of the work W.

As the respective tool placement methods M1 to M3 registered in the line type tool splitting method setting means 1 of FIG. 2, according to the shape of the machining figure a for each of the line types LA to LC classified in this way. Define and register the method for performing the tool placement described above. The tool placement methods M1 to M3 include the type of tool used, the placement location, the punching order, and the like according to the machining shape. In addition, the tool placement methods M1 to M3 are determined and registered for each part depending on the machining shape. The punching order needs to be performed in a predetermined order in the following cases. For example, when the plate edge down line LC is processed by punching a large number of times, it is necessary to perform punching sequentially from the opening side of the recessed portion to the back side in order to perform processing so that slag does not remain. Such punching order is also set in the tool placement method M3.

As described above, the tool placement methods M1 to M3 for each line type are determined in advance in the preparation stage (S1), and in the process of placing the tool on each machining figure, the determination is made after the line type determination (S2). Setting tool placement method M1 corresponding to the result
Tool placement is performed according to M3 (S3).

In the above-mentioned line type determination step (S2), more specifically, from the data of the machining figure stored in the machining figure file 2, the line of the portion in which the tool is arranged in the machining figure is any of the above line types LA. To LC are determined by the line type determination means 4. This determination is performed by setting line data conditions and work conditions specific to each of the line types LA to LC as the determination conditions in the line type determination means 4 and determining which conditions the processed figure satisfies. Further, the line type determination means 4 is provided with a post-process graphic data creating means 5 for creating graphic data after a predetermined post-process of the processed graphic stored in the post-process data storage unit 3, for example, shirring, When the subsequent process is performed, the line types LA to LC are determined for the graphic data after the subsequent process.

In the automatic tool placement step (S3), the automatic tool assignment means 6 selects from the line type tool assignment method setting means 1 the tool placement methods M1 to M3 corresponding to the determination result by the line type determination means 4, and Tool placement method M1-M
According to 3, the arrangement of the tool with respect to the machining figure is determined.
The determined tool placement data is the tool placement data file 7
Output to.

4 and 5 show an application example of this tool placement method. When the machining figure a and the work W have the shapes shown in FIG. 4A, the entire machining figure a is the contour machining line L.
It is determined to be A. As a result, as shown in FIG. 4B, a large number of tools are arranged side by side in the region T along the entire circumference of the processed figure a. WH indicates the work holder position of the punch press.

FIG. 5A shows an example in which one work W is punched into two products W1 and W2 shown by the hatched area of the chain line. In this case, as a post-process of punching the product W1, a process of cutting the work W into two pieces at the cutting line K at the center is included. In this case, the tool is arranged in consideration of the shape after the separation. That is, the portion along the cutting line K is the contour processing line LA, and the notch b on the first product W1 side along the cutting line K is formed.
Numeral 3 is a strike-down line LB in the plate and other notches b1, b2, b
4 is determined as the plate edge down line LC, and the tool placement is performed as shown in FIG. The symbols added to the symbols of the line types LA to LC indicate the processing order.

In the work W shown in FIG. 5A, first, the notches b1, b2 and b4 of the respective parts denoted by reference numerals are punched, and then the cutting along the cutting line K is performed by punching. The separated product W1 is discharged by an appropriate means. After this, cutout b
2 punch processing is performed. Since the notch b2 becomes the plate edge down line LC after separation, the tool is arranged by the third tool arranging method M3. Since the notch b3 is machined in the intermediate portion of the work W before being cut off, the notch b3 is determined to be the plate down line LB.

According to this tool placement method, 3
Since the tool placement methods M1 to M3 for the line types are determined in advance by classifying into the line types LA to LC, and the tools are placed according to the above-described set placement method in consideration of the subsequent process, the conventional line types and Proper tool placement can be performed compared to the placement method that does not consider the process. As a result, automatic tool placement with a high degree of completion can be performed, and it is not necessary or necessary to manually correct the tool placement.

[0021]

According to the method for arranging tools on the processed figure data of the present invention, the line types of the figure for punching are set to three types, that is, a contour processing line, a plate midline strike down line, and a plate edge downline. After classifying, the tool placement method is set in advance for each line type, and it is determined which line type the actual machining figure corresponds to, including the predetermined post-process data, and then the determination. Since the tool is arranged according to the set tool arrangement method corresponding to the selected line type, the tool arrangement can be arranged with a high degree of satisfaction.

[Brief description of drawings]

FIG. 1 is a flowchart showing a tool placement method according to an embodiment of the present invention.

FIG. 2 is a conceptual configuration diagram of an automatic tool placement device embodying the tool placement method.

FIG. 3 is an explanatory diagram of three types of lines.

FIG. 4 is an explanatory diagram of a machining figure and a tool placement result by this tool placement method.

FIG. 5 is an explanatory diagram of another example of a processed figure and a tool placement result by this tool placement method for the figure.

FIG. 6 is an explanatory diagram of a process from creation of a conventional product CAD figure to creation of an NC program.

FIG. 7 is an explanatory diagram of an inappropriate example of conventional tool placement.

FIG. 8 is an explanatory diagram of another inappropriate example of the conventional tool arrangement.

[Explanation of symbols]

1 ... Line type tool allocation method setting means, 4 ... Line type determining means,
6 ... Automatic tool allocating means, a ... Machining figure, b1-b4 ... Notch, K ... Cutting line, LA ... Contour machining line, LB ... Plate down-cut line, LC ... Plate edge down line, M1-M3 ... Tool placement method, T ... Tool placement area, W ... Work, W1, W2 ... Product

Claims (1)

[Claims] 1. A line type of a figure for punching is classified into three types, a contour processing line, a plate down line, and a plate edge down line, and a tool placement method is preset for each line type. According to the step, a step of determining which of the above-mentioned three kinds of line types the machining figure corresponds to, including predetermined post-process data, and the setting tool placement method corresponding to the determined line type. A method for arranging tools on machining figure data, including a process of arranging tools on machining figures.