JPH06312286A - Scrap processing method of thermal cutting machine - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a scrap processing method which enables easy creation of a scrap shredding program and can shred scrap without damaging the product. [Structure] When a workpiece 2 is cut by a thermal cutting machine, a scrap shredding program is added to the product processing program in advance to start cutting the product 1, and when the product 1 is cut, the product 1 and the cutting die 3 are cut. The special processing shape 4 is applied to the intersection point of, and the scrap 1 is shredded along the cutting line 3 by the shredding program while the product 1 is left after cutting the product. Since the position of the cutting line 3 can be set without being constrained by, it is easy to create a shredding program, and by applying the special processing shape 4, the product 1 is not damaged when scrap is cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scrap processing method for a thermal cutting machine for processing frame-shaped scrap produced by cutting.

[0002]

2. Description of the Related Art Conventionally, when a plate-shaped work is cut by a thermal cutting machine such as a laser processing machine or a plasma processing machine,
Frame-shaped scrap called residual frame is generated. Conventionally, this scrap is generally used after the cut product drops below the work table and is carried out, then shredded on the work table and dropped onto the scrap conveyor, and then discharged on the scrap conveyor. There is.

[0003]

However, in the above-described conventional processing method, when the scrap is shredded by the shredding program inputted in advance, the shredding head does not interfere with the part where the scrap product is removed. It is necessary to create a cutting program, and there is a problem that a lot of man-hours are required to create a shredding program. In addition, in order to reduce the number of manufacturing steps, it is possible to pre-cut the product while avoiding the shredding line, but this method limits the plate cutting position of the product due to the shredding line, so the yield of the material is reduced. There is a problem that gets worse. Furthermore, in the above-mentioned conventional method, in order to shred the scrap, the scrap is again carried onto the work table after the product is carried out, so that there is a problem that the processing cycle time becomes long and the productivity is lowered. The present invention has been made in order to improve such a problem, and an object of the present invention is to provide a scrap processing method for a thermal cutting machine in which a shredding program can be easily created and scrap can be processed efficiently.

[0004]

In order to achieve the above object, the present invention adds a scrap shredding program to a product processing program in advance when cutting a work by a thermal cutting machine and cuts the product. At the time of cutting the product, a special processing shape was applied to the intersection of the product and the cutting line, and the scrap was shredded along the cutting line by the shredding program with the product left after cutting the product. It is a thing.

[0005]

[Operation] With the above configuration, after the product is cut, the scrap can be shredded at that position, and there is no risk of damaging the product when the scrap is shredded.

[0006]

Embodiment An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view showing a plate-shaped work 2 in which a product 1 to be cut by a heat cutting machine (not shown) is laid out in advance by a CAD system, and FIG. 2 is for inputting a cutting line to this work 2. 6 is a flowchart for creating a cutting program for the above. First, in step 101 of the flowchart, the material cutting line command is turned on in step 102 to input the cutting line 3 to the work 2 on which the product 1 is laid out, and in step 103, the position of the cutting line 3 is input. The cutting lines 3 may be evenly spaced or unequally spaced.

If the equal intervals are selected in step 104, the process proceeds to step 105. If the unequal intervals are selected, the process proceeds from step 106 to step 107, and the cutting line 3 is input. The cutting line 3 to be input is XS: X coordinate start point, Y
S: Y coordinate start point, if equidistant, Yg: Y coordinate end point, P: pitch interval, and unequal spacing, XY:
The Y coordinate end point is input. After that, when it is confirmed that the input is completed in step 108, the cutting line check routine is entered in step 109 to start and end the cutting line, have an odd number of intersections, and overlap the elements of the product 1 (A circle in FIG. 3). When the cutting line 3 overlaps with the element of the product 1,
The offset amount is input in step 110 to avoid overlapping. As described above, the input of the cutting line 3 is finished first.

Next, based on the data created by the flow chart shown in FIG. 2, a special processed shape pattern for avoiding the cutting line 3 from being applied to the product 1 is added according to the following Table-1 and the cutting line 3 of the sock lap is added. The work of redrawing is performed according to the flowchart shown in FIG.

[0009]

[Table 1]

First, step 2 shown in the flowchart of FIG.
At 01, the intersection of the product drawing and the cutting line is calculated, and the central coordinate data for machining the special machining shape 4 as shown in FIG. 5A at the vertical position of the product element at the intersection is obtained. Further, in step 202, the specially processed shape 4 that is added perpendicularly to the intersection is created as the specially processed shape 4 that always enters the product 1. Therefore, as shown in FIG. In the case of the specially processed shape 4 that is in contact with the outer shape line, a perpendicular line is drawn to the specially processed shape 4, and the specially processed shape 4 is deleted for those having an odd number of intersections with the product 1. And the cutting line 3
In the case of the specially processed shape 4 in contact with, the one having an even number of intersections with the product 1 is deleted. Then, in step 203, the center coordinate data of the special machining shape 4 is stored in the memory in the order of machining paths.

Next, in step 204, the interference between the specially processed shape 4 itself and the product 1 is checked, and in the case of the interference, the specially processed shape 4 is reduced in the above table 1 in step 205 to avoid the interference. Reduce along the ratio data. After that, in step 206, special machining shape data is added to the product drawing data, and in step 207, two points including the start point, the end point, and the intersection of the cutting line 3 are secured from the center coordinate data of the special machining shape 4, and in step 208, The presence / absence of data is checked. In step 209, it is checked whether or not the special processing shapes 4 are overlapped with each other. If they are not overlapped, the cutting line data is added to the product drawing in step 210 as shown in FIG. is there.

After the product processing program and the shredding processing program are created as described above, this data is finally input to the NC device, and the cutting of the work 2 is started by this processing program. In the cutting of the workpiece 2 by the thermal cutting machine, first, the cutting of the product 1 is performed by the product processing program, and the cutting line 3 and the product 1 previously input during the cutting process.
A loop of the specially processed shape 4 is formed at the intersection of. When the cutting of the entire product 1 is completed as described above, the shredding program of the scrap 5 is executed before the product 1 is discharged. That is, the cutting program entered in advance starts cutting the frame-shaped scrap 5 called the remaining frame at the start point of FIG. 6 and sequentially cuts it to the end point.

At the intersection of the product 1 and the cutting line 3, a special processing shape 4 is applied in advance when the product is cut. Therefore, the cutting does not reach the product 1 and the product 1 is left in the remaining frame. In the state, the scrap 5 can be shredded one after another. When the shredding program is completed and the scrap 5 is shredded, the product 1 is separated into the product collecting conveyor and the scrap 5 is separated into the scrap collecting conveyor, and collected and discharged from the thermal cutting machine. Become.

[0014]

As described in detail above, according to the present invention, after the cutting of the product, the scrap can be cut while the product is left in the remaining frame. Since the processing cycle time can be shortened as compared with the case of shredding, productivity is improved. In addition, since the shredding program can be created without considering the interference with the product, the man-hour required for creating the shredding program can be significantly reduced, and it is not necessary to avoid the cutting lines to lay out the product. The yield is also improved. Further, since the special processing shape is applied to the intersection of the product and the cutting line in advance when cutting the product, the product is not damaged when the scrap is cut, and the product with high cutting quality can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a work for implementing a scrap processing method according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a scrap processing method according to an embodiment of the present invention.

FIG. 3 is a plan view of a work processed by the scrap processing method according to the embodiment of the present invention.

FIG. 4 is a flowchart showing a scrap processing method according to an embodiment of the present invention.

5 (a) and 5 (b) are operation explanatory views of a scrap processing method according to an embodiment of the present invention.

FIG. 6 is a plan view of a work processed by the scrap processing method according to the embodiment of the present invention.

[Explanation of symbols]

1 ... Product, 2 ... Work, 3 ... Cutting line, 4 ... Special processing shape, 5 ... Scrap.

Claims (1)

[Claims] 1. When a workpiece 2 is cut by a thermal cutting machine, a scrap shredding program is added to the product processing program in advance to start cutting the product 1, and the product 1 is cut.
When performing the cutting, the special machining shape 4 is applied to the intersection of the product 1 and the cutting line 3, and the scrap 5 is shredded along the cutting line 3 by the shredding program while the product 1 remains after cutting the product. A method for scrap processing of a thermal cutting machine characterized by the above.