JPS6298401A - Automatic preparing method for nc data - Google Patents

Abstract

PURPOSE:To execute working of a polygon by punching plural rectangular holes by the respective jigs, by dividing a polygon working area into rectangles, and preparing an NC data for selecting the jig for working the rectangular hole by a coordinate of each rectangle. CONSTITUTION:A CPU 103 inputs a development 301 which has been inputted from an input device 101, and subsequently, a polygonal hole 302 is taken out. Rectangles 21-23 are completed by taking notice of an X coordinate of apexes 13-30 for constituting a polygon 302, and subsequently, a horizontal division of the polygon is executed, and minute rectangles 30-35 are obtained. A jig data for NCTPP is compared with a coordinate data which has been stored in a memory 104, and an NC data for working the rectangles 42, 32 and 35 is prepared. The NC data calculates an X size and a Y size from the first record of a coordinate data 50, compress them successively with an X size and a Y size from the first record of a jig data 51, finds out and prepares an optimum jig, and coordinates G, H and K of a punching position and a jig No. used for the respective punching workings, in the memory 104.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for creating NC data necessary when punching sheet metal parts with an NG'1rTP (NC turret punch press).

[Background of the invention]

When operating an NG machine tool to punch out a sheet metal part, it is necessary to provide the NG machine tool with NC data that determines the jig to be used. The creation of this NC data was conventionally [Labor Saving and Automation J (April 1978 issue, p. 46-51)]
As described in , a full-time programmer did the work manually without looking at the drawings. This is a very time-consuming task and requires a long period of time to train a full-time programmer, so a method for automatically creating NC data has been desired.

In the case of sheet metal punching using NCTPP, the processed parts are often polygonal, which is a cause of inhibiting automatic creation of NC data.

[Purpose of the invention]

An object of the present invention is to provide an automatic NC data creation method for automatically creating NC data in sheet metal punching using NCTPP.

[Summary of the invention]

In order to achieve the above object, in the present invention, a polygonal processing area is divided into rectangles, and NC data for selecting a jig for processing a hole in the rectangle is created based on the coordinates of each rectangle. Then, a plurality of rectangular holes are punched out using respective jigs to process polygons. Preferably, the polygon is divided into vertical and horizontal directions according to the coordinates that make up the polygon to generate minute rectangles, and in order to minimize the number of jigs used and improve the processing efficiency of NCTPP, The polygon is represented by a set of the minimum number of rectangles.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In this embodiment, a developed view 301 of the sheet metal shown in FIG.
NG to select a jig to process the polygonal punched hole 502 inside
An example of data creation will be explained.

FIG. 2 is a configuration diagram of the control section of the NC machine tool, and the central processing unit CPU103 includes an input device 101. Output device 102
．． A memory 104 and a file 105 are connected.

The control program processed by this CPU 103 is
As shown in the figure.

The CPU 103 first takes in the expanded view 301 (FIG. 1(a)) that has been input multiple times through the input device 101 (step 20).
1), then the polygonal hole 302 (FIG. 1(b)) is taken out (step 202). The developed diagram 601 imported in step 201 is composed of the coordinates of each vertex 1 to 20 and the line type indicating whether the distance between the vertices is a straight line or a curve. The connection of lines including the point 1 with the minimum Y coordinate is defined as the external shape, and the other lines are defined as punched holes (polygonal holes 302).

Next, in step 203, the polygonal hole 302 is vertically divided to obtain rectangles 21, 22, and 23 shown in FIG. 1(c) K. This vertical division is performed as follows.

(1) Select the point with the minimum value of the X coordinate.

This selects vertex 13.20.

(11) Draw a perpendicular line 24 between vertex 13 and vertex 20.

輔　Find the point connected to vertex 13 and coordinate 20.

This finds point 14.19.

伶 Vertical 1v1 to the smaller X coordinate between vertex 19 and vertex 14
Subtract 1i125 (rectangle 21 completed) M Vertices 13, 19, and 20 that make up rectangle 21 are processed.

6/D Define the newly generated point 26 and use it as a processing target.

The above processes (1) to &D are repeated to obtain rectangles 21, 22°23. Vertices 16 forming the trench, polygon 602
Focusing on the X coordinates of ~20, complete rectangles 21, 22, and 23.

Next, the polygon 2 is divided horizontally (step 204). This is a method that focuses on the Y coordinates of the vertices 13 to 20, and is performed in the same way as the vertical division of the polygon. As a result, Figure 1 (d
), the minute rectangles 30, 31, 32, 33°34
．． 35 is obtained.

The minute rectangles 60 to 35 obtained in this way are
In step 5, synthesize by the following procedure. First, among the minute rectangles, the one with the largest area is set as the starting rectangle. In the case of this embodiment, the lengths of the horizontal line 38 (FIG. 1 (θ)) and the vertical line 39 of the starting rectangle 30 are compared, and the starting rectangle 30 is synthesized with the minute rectangle 31 that is in contact with the longer horizontal line 38. Then, a new minute rectangle 40 (FIG. 1(f)) is generated.

Then, using the generated minute rectangle 40 as a starting rectangle, the lengths of the horizontal line 41 and the vertical line 42 are compared, and the minute rectangle i1. Combine +4 and starting rectangle 40. By repeating this process, rectangles 43, 52, and 35 are obtained as shown in FIG. 1C). rectangle 43,
32. Lower left point and upper right point of 35 (a + b) r (c, d)
, (e, f) are stored in the memory 104 for each rectangle as coordinate data.
is stored in

In step 206, the jig data for NCTPP is compared with the coordinate data stored in the memory 104 (fourth
2) to create NG data for processing rectangles 43, 32, and 35. The jig data is in file 10 in advance.
5 in the form shown in Figure 4. NG data is
Calculate the X dimension and 7th dimension from the code number of coordinate data 50, compare them with the X dimension and 7th dimension from the code number of jig data 51, find and create the most suitable jig, and calculate the coordinate G of the punching position. , I(, , and the jig Nα used for the respective punching operations are stored in the memory 104. Of this NG data, those corresponding to the rectangle 46 are shown in FIG. 5. Data comparison for all rectangles is performed. After the process is completed and NG data is created, NG data is output (step 207).

This state is shown in FIG. That is, the NC data is output to the recording medium 44 via the output device 102 for each code. The recording medium 44 is held in a holder 45 in which a jig is set.
The position information and the punching position on the material 46 are conveyed to NCTPP for processing.

〔Effect of the invention〕

According to the invention, sheet metal parts with polygonal machining areas can also be
Processing data for NCTPP can be automatically created without the need for manual labor.

[Brief explanation of drawings]

Figure 1 (a), (b), (c), (d)
, (e), (f), and (g) are explanatory diagrams of the NC data creation method according to an embodiment of the present invention, FIG. 2 is a configuration diagram of the control section of the NC machine tool, FIG. 6 is a flowchart, and FIG.
The figure is a comparison diagram of coordinate data and jig data, Figure 5 riNe
The data format diagram, FIG. 6, is an explanatory diagram of processing using NC data. 1 to 20... Vertex 32.35.43... Rectangle 50... Coordinate data 51... Jig data 301... Development view 602... Polygonal hole ＼ , ゛゛・-

Claims (1)

[Claims] In a system where the processing data of a sheet metal parts punching machine is inputted as coordinate values of the developed shape data of the sheet metal part that is the workpiece, processed by a computer, and then output, the polygon processing area in the developed shape data is output. An automatic NC data creation method characterized by dividing into rectangles, selecting a jig corresponding to each rectangle from jig data, and creating NC data including data of each rectangle and data of the corresponding jig. .