JPH1029080A - Automatic programming device of laser beam machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce programming man-hours and to prevent a nozzle gap sensor from causing a risk of falling off, etc., by allotting a machining start position of each hole so that a route of a machining nozzle does not pass the upper part of a machined hole. SOLUTION: In numerical control for automatic hole cutting, when a machining start point 2 is at the lower part of a hole 1 to be machined, there is no problem for the machining direction (1), but for the direction (2) a machining nozzle passes above the machined hole 1A for idle feeding route. On the other hand, when a machining start point 2 is at the upper part of a hole 1 to be machined, for the direction (1) a machining nozzle passes above the machined hole 1A, there is no problem to pass for the machining direction (2). That is, if machining is started from the part nearest to a hole to be machined on the following machining route or in its direction, the machining nozzle can avoid to pass above the machined hole 1A, falling off of the nozzle gap sensor is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic programming device for a laser beam processing machine.

[0002]

_2. Description of the Related Art Recently, processing of sheet metal workpieces using a high-power laser beam such as a YAG or CO ₂ laser, for example, melt cutting, drilling, welding, trimming, and the like have been widely used, and automatic processing has been performed.

[0003] In an automatic programming device of this type of processing machine, CAD (computer-aided design) is used.
The machining shape is input by an input method or the like, a path for laser beam machining is instructed, and NC (numerical control) programming data is created.

[0004] For example, in drilling, the machining paths can be assigned in the order of input, or the machining paths can be assigned in a convenient order.

[0005]

However, for example, in the assignment of machining paths in a plurality of drilling operations, depending on the method of designating the order of machining, there is a problem in actual machining, for example, due to the combined use with a nozzle gap detection sensor or the like. May occur.

That is, as one example, as shown in FIG. 5, for example, in two cases (a) and (b) in which the work assignment order of three holes 1 is designated, the machining of each hole 1 is started. In the machining operation connecting point 2, each idle feed path is represented by a dotted line, and the machining path is represented by a solid line.

Although there is no problem in the case of FIG.
In the case of (b), since the processing laser beam nozzle passes over the hole from which the circular scrap has fallen after the processing of a certain hole, as shown in FIG.
When the nozzle gap sensor 3 considered at a high speed passes through the processed through hole 1A, there is a risk that the nozzle gap sensor 3 will fall into this hole.

In such a case, the nozzle gap sensor 3
The processing head once so that it does not fall into the processed hole 1A.
Although the programming method for raising the temperature is generally used, there is a disadvantage that the processing time increases accordingly.

The present invention has been made in view of the above-described aspects, and is not a means for coping with the occurrence of a machining path as in the above-described example as in the conventional example, but is previously implemented in an automatic programming device. An object of the present invention is to provide a means for preventing danger from occurring and for reducing the idle feed path.

[0010]

According to the present invention, there is provided an automatic numerical control machining data programming apparatus for a laser beam machining machine for cutting a hole in a sheet metal work, wherein a plurality of machining holes are assigned to the machining path. The object is achieved by allocating the processing start point position of each hole based on the information of the shape, position, and processing order of the hole so that the path of the processing nozzle does not pass above the processed hole. Things.

[0011]

According to the means of the present invention as described above, at the stage of allocating the machining path, the machining of each hole is started so that the machining nozzle does not pass over the already machined hole based on information such as the shape, position, order and the like of the plurality of holes. Since point positions can be assigned,
By the automatic setting, the number of programming steps can be reduced, the danger of the nozzle gap sensor falling down can be prevented, and the effect of shortening the processing time can be obtained.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described in detail based on one embodiment.

[0013]

FIG. 1 shows a numerical control (N) for automatic hole cutting of a sheet metal work by a laser beam nozzle of this kind.
C) An outline of the flow of program creation will be described.

As is well known, this kind of programming is performed by an automatic programming device as shown in FIG. 1 (a). First, as shown in FIG.
The hole machining position coordinates are input by the CAD system described above, and then the actual machining path is numerically controlled in (d) by the CAM (computer assisted manufacturing) system (c), and then the post processor (e) By
An actual NC data program is created as shown in FIG.

In the above-described flow, the embodiment of the present invention automatically determines a machining start point such that the laser beam nozzle of the next process does not pass over the machined hole, judging from the machining order of each hole. Figure 2
An example in which the number of processed holes shown in FIG. 3 is a minimum of three will be described.

In FIGS. 2 and 3, FIG.
FIG. 3B is an enlarged view when the machining start point 2 of each hole 1 is at the lower or upper part of the drawing. FIG. 2B shows each machining path (order) in each case by a solid line, and the idle feed path by a dotted line. It is a thing.

First, as shown in FIG.
However, if it is located below the processing hole 1, there is no problem in the direction of the processing direction, but in the case of the direction, it passes over the processed hole (the above-mentioned FIG. 61A) by an idle feed path. Conversely, as shown in FIG. 3, when the machining start point 2 is located above the machined hole 1, the machined hole 1A
There is no problem because it passes above and does not pass in the processing direction.

As described above, when the three holes shown in the figure are to be machined, if the machining is performed in the direction of, the machining start point 2 is set below the hole, and In this case, if the processing start point 2 is set at the upper part, the processing nozzle does not have to pass over the processed and dropped hole.

That is, if the processing is started from the portion closest to the processing hole on the next processing path, or from that direction, it is possible to avoid passing over the processed hole, and the described nozzle gap It is possible to prevent the possibility of the sensor 3 falling off.

FIG. 4 shows the processing (cutting) path of one embodiment in the case of three processing holes in an arbitrary arrangement by a solid line and idle feeding (no cutting).
The path is indicated by a dotted line, the processing order is indicated by, and the processing start point is indicated by a point code with a bar.

Although the present type of automatic programming apparatus does not have a function of automatically setting the machining start point from the machining order even if the machining start point can be set arbitrarily, the present invention The embodiment is an automatic programming device that can set a processing start point of each hole at an automatic time so as not to pass over a processed hole, judging from a processing order of each hole.

[0022]

As described above, the current automatic programming device of this type of laser beam machining machine has a function of arbitrarily setting the machining start point, but the machining sequence and machining direction are not changed. In order to allocate the processing order so that the processing nozzle does not pass over the processed hole while taking into account, it is necessary to perform sensing processing, etc., which is faster than deemed control, and it requires a large amount of labor and man-hours According to the present invention, at the stage of allocating the processing path, since the processing start point of each processing hole is configured to allocate the processing nozzle from the information such as the shape position order so as not to pass above the processed hole, there is a problem. Since each processing start point that does not occur is automatically set, programming man-hours can be greatly reduced, and processed holes such as nozzle gap sensors that can be regarded as high speed It can prevent the falling off, and the like.

As a result, the idle feed path becomes relatively short, so that the machining time is shortened and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a flow of creating a numerical control program.

FIG. 2 is an explanatory view of a processing path (part 1).

FIG. 3 is an explanatory view of a processing path (part 2).

FIG. 4 shows an example of processing path setting

Fig. 5 Example of processing path

FIG. 6 shows an example of a relative positional relationship between a processed hole and a nozzle gap sensor.

[Explanation of symbols]

 1 machining hole 2 machining start point 3 nozzle gap sensor

Claims (1)

[Claims] In an automatic numerical control machining data programming device of a laser beam machining machine for performing a hole cutting machining of a sheet metal work, in a machining path assignment stage of a plurality of holes,
Laser beam processing characterized in that a processing start point position of each hole is assigned based on each information of a shape, a position, and a processing order of each hole so that a path of a processing nozzle does not pass above a processed hole. Machine automatic programming device.