JPH11114681A - Synchronous z-axis control method for laser beam machine and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synchronous Z axis control method for laser beam machine and a device therefor capable of shortening working hours while being safely moved to a next working start point in a high speed. SOLUTION: At the same time a NC device 11 issues a quick feed command in the X axis direction/or Y-axis direction to move a working head 3 to a next working position after completing a previous working, a PMC 13 (programmable machine control) arranged to the laser beam machine conducts a Z-axis ascending command, the working head simultaneously starts to move in the X-axis, Y-axis, Z-axis directions. Further, before the NC device 11 issues a quick feed completion command in the X-axis and/or the Y-axis as the working head moves near a next working position, the PMC 13 conducts a Z-axis direction descending command to simultaneously complete the X-axis, Y-axis, Z-axis direction movement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for controlling a synchronous Z-axis of a laser beam machine, and more particularly, to a method of synchronizing a laser beam machine to move a machining head from a point where machining is completed to a next machining position. The present invention relates to a Z-axis control method and a device thereof.

[0002]

2. Description of the Related Art Conventionally, as a method of moving a processing head from a processing end point to a next processing start point in a laser processing machine, the following method is generally used.

(1) As shown in FIG. 10, the processing head is once raised, moved to the next processing start point, and then lowered.

(2) As shown in FIG. 11, the machining head is directly moved to the next machining start point without being raised.

(3) As shown in FIG. 12, the machining head is moved up and down by controlling the Z axis by a program, and X
The machining head is moved along three axes, that is, the axis, the Y axis, and the Z axis at the same time.

[0006]

However, such a conventional technique has the following problems.

(1) In the case of FIG. 10, three operations of ascending, moving and descending are performed, so that it takes a moving time.

(2) In the case of FIG. 11, since the scrap or the product P which is cut off may rise from the work W as shown in FIG. 13, the processing head 101 may collide.

(3) In the case of FIG. 12, one of the X axis and the Y axis
Block command is X, Y, Z rise, X, Y movement,
Since there are three blocks of X, Y and Z descending, the program becomes longer. In addition, when switching between ascending, moving, and descending, an in-position check is performed to decelerate, so that the effect of shortening the time is reduced.

An object of the present invention has been made by paying attention to the above-mentioned conventional technology, and aims to reduce the processing time by moving the processing head to the next processing start point safely and at high speed. It is an object of the present invention to provide a synchronous Z-axis control method for a laser beam machine and a device therefor.

[0011]

According to a first aspect of the present invention, there is provided a synchronous Z-axis control method for a laser processing machine, comprising: In a synchronous Z-axis control method for a laser processing machine that performs laser processing on a workpiece by moving the workpiece in a Y-axis direction and a Z-axis direction, the NC apparatus instructs movement in the X-axis and / or Y-axis directions by a program of the NC apparatus. In the case where the movement command from is a fast-forward movement command, a fast-forward movement start signal is received, and at the same time, a Z-axis direction ascending command is issued by the PMC provided in the laser processing machine,
Before the end of the rapid traverse movement from the NC device, Z
An axial descent command is issued.

Accordingly, the NC device issues a fast-forward command in the X-axis and / or Y-axis directions to move the processing head to the next processing position after the previous processing is completed, and at the same time, the NC device is provided in the laser processing machine. PMC (Programmable Machine Control) issues a command to raise the Z-axis
Movement starts simultaneously in the axis, Y-axis, and Z-axis directions. Further, the NC device is moved to the vicinity of the next processing position and the X-axis and / or
Alternatively, the PMC issues a Z-axis direction descending command before the end of the fast-forward movement in the Y-axis direction so that the movements in the X-axis, Y-axis, and Z-axis directions are completed at the same time.

According to a second aspect of the present invention, there is provided a synchronous Z-axis control apparatus for a laser beam machine, wherein a machining head is moved in an X and / or Y-axis direction and a Z-axis direction with respect to a workpiece by an NC device to perform laser processing on the workpiece. Synchronized laser processing machine Z
An axis control device, comprising: an X-axis from the NC device;
Or, when a fast-forward movement start command in the Y-axis direction is issued, a Z-axis direction ascending command is issued, and the NC device performs a Z-axis direction descending command before the fast-forward movement ends. Is what you do.

Therefore, the NC device issues a fast-forward command in the X-axis and / or Y-axis directions to move the processing head to the next processing position after the previous processing is completed, and at the same time, the NC device is provided in the laser processing machine. PMC (Programmable Machine Control) issues a command to raise the Z-axis
Movement starts simultaneously in the axis, Y-axis, and Z-axis directions. Further, the NC device is moved to the vicinity of the next processing position and the X-axis and / or
Alternatively, the PMC issues a Z-axis direction descending command before the end of the fast-forward movement in the Y-axis direction so that the movements in the X-axis, Y-axis, and Z-axis directions are completed at the same time.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a synchronous Z-axis controller 1 for a laser beam machine according to the present invention. Here, synchronous Z
Axis control refers to raising and lowering the Z-axis during movement in the X-axis direction and the Y-axis direction from the end point of the pre-machining (one path end point) to the next pierce point, which is the descending point. In the synchronous Z-axis control device 1 of the laser processing machine, PM is transmitted to an NC device 11 that controls an X-axis motor 5, a Y-axis motor 7, and a Z-axis motor 9 for moving and positioning the processing head 3 according to a program.
C (programmable machine control) 13 is connected. This PMC 13 issues a command only to the Z-axis motor 9.

With the above configuration, the NC device 11 issues a fast-forward movement signal to the X-axis motor 5, the Y-axis motor 7, and the Z-axis motor 9 and simultaneously issues a fast-forward start signal to the PMC 13. When receiving the fast-forward start signal from the NC device 11, the PMC 13 issues an ascending command to the Z-axis motor 9. Therefore, as shown in FIG. 2, the object is moved in the X-axis direction and the Y-axis direction, and is simultaneously raised in the Z-axis direction.

The NC device 11 sends a Z-axis descending signal to the PMC 13 before the end of the movement in the X-axis direction and the Y-axis direction,
Since the MC 13 issues a lowering command to the Z-axis motor 9 to lower the machining head 3, the lowering in the Z-axis direction is completed simultaneously with the completion of the movement in the X-axis direction and the Y-axis direction as shown in FIG.

Next, the contents of the synchronous Z-axis control of the laser beam machine will be described. Basically, the X and Y movement control from the end point of the pre-machining to the next pierce point is performed according to the same NC program as in the prior art as shown in FIG. Perform axis control.

The basic operation is performed when moving to the next pierce point without processing (referred to as "no closing value"), but when there is no closing value that moves while following the Z-axis sensor, the conventional operation is performed. Z-axis control is performed.

As shown in FIGS. 4A and 4B, the basic operation consists of a Z-axis ascending operation and a Z-axis descending operation during X and Y-axis rapid traversing. Done. Also, if the rising point <the falling point, it is treated as the rising point = the falling point.

The Z-axis raising operation starts at the same time as the X-axis and Y-axis rapid traverse after the M104 command in FIG. 3, and ends when the reaching point of the rising is reached or the Z-axis lowering operation starts. In addition, the Z-axis lowering operation starts as soon as the X-axis and Y-axis rapid traverse is completed, as shown in FIG. In the case of the X-axis and Y-axis rapid traverse at the time of the program start, the Z-axis control is similarly performed, and as shown in FIG.
If the axis is above the ascending point, it first moves to the ascending point and then receives Z-axis control.

As described above, except for the case of "no closing price", the following various special operations are performed.

For example, a work shooter command (M104M1
08), as shown in FIGS. 7A to 7C, the Z-axis rises to the work shooter return height (see FIG. 7A), and after the work shooter operates (FIG. 7A). (See FIG. 7B) and perform the above-described basic operation (see FIG. 7C).

For example, a machine stop command (M10
4M00), as shown in FIGS. 8A to 8C, the Z-axis rises to the conventional M00 return height (see FIG. 8A), and after the machine stops (FIG. 8A). (See FIG. 8B) and perform the above-described basic operation (see FIG. 8C).

In the program shown in FIG. 3, if there are two or more fast-forward commands in the X-axis and Y-axis directions between M104 and M103, as shown in FIG. The basic operation is performed at the time of the command, and at the time of the second or subsequent fast-forward command, fast-forward is performed in the X-axis and Y-axis directions at the position of the descending point.

In the case of the origin return (G50, G130), the Z-axis rises and the X-axis and the Y-axis return as before. In the three-dimensional object processing, the Z-axis offset command (G93Z_) synchronous Z-axis control is not performed. Further, in the clamp-side region, synchronous Z-axis control is not performed in a certain region to avoid collision with the clamp.

From the above results, the processing head 3 is raised when the movement in the X-axis direction and the Y-axis direction is started, so that the collision of the processing head 3 with the scraps or products P cut off can be avoided.

Also, simultaneously with the movement in the X-axis direction and the Y-axis direction by the NC program from the NC device 11, the PCM 1
Since the movement in the Z-axis direction is performed according to the command from 3, the processing time can be reduced. The NC program at this time is the same as that in the case of rapid traverse in the X-axis and Y-axis directions. Since the Z-axis direction is separately commanded from the PMC 13, the NC program is short and the movement time can be reduced.

Further, since the movement of the Z-axis does not affect the movement of the X-axis and the movement of the Y-axis, the deceleration due to the in-position check is eliminated and the high-speed movement becomes possible.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. That is, in the above-described embodiment, the case where fast-forwarding is performed in the X-axis direction and the Y-axis direction has been described. Also,
A CNC device may be used instead of the NC device 11 described above. Further, the Z-axis can be controlled not only by the PMC but also by a CNC device.

[0032]

As described above, in the synchronous Z-axis control method for the laser beam machine according to the first aspect of the present invention, the NC device is operated to move the machining head to the next machining position after the previous machining is completed. Issue a fast-forward command in the axis and / or Y-axis direction, and at the same time,
(Programmable Machine Control) issues a Z-axis direction upward command and starts moving in the X-axis, Y-axis, and Z-axis directions at the same time, so that it is possible to prevent the cut head or scrap from colliding with the processing head. it can. Further, the NC device is moved to the vicinity of the next processing position and the X-axis and / or
Or, before issuing the rapid traverse movement end command in the Y-axis direction,
C issues a Z-axis direction down command so that the movements in the X-axis, Y-axis, and Z-axis directions are completed at the same time, so that the NC program is short, and the moving time of the processing head is shortened. Can be shortened.

In the synchronous Z-axis control device for a laser beam machine according to the second aspect of the present invention, the NC device is used to move the machining head to the next machining position after the previous machining is completed.
Or, at the same time as issuing a fast-forward command in the Y-axis direction, a PMC (programmable machine control) provided in the laser processing machine issues a command to ascend in the Z-axis direction to output the X-axis,
Since the movement is started simultaneously in the Y-axis direction and the Z-axis direction, it is possible to prevent the cut-off scrap or product from colliding with the processing head. Further, before moving to the vicinity of the next machining position and before the NC device issues a fast-forward movement end command in the X-axis and / or Y-axis directions, the PMC issues a Z-axis direction descending command to execute the X-axis, Y-axis, and Z-axis. Since the directional movement ends at the same time, the NC program is short, and the moving time of the processing head is reduced, so that the processing time can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a synchronous Z-axis control device of a laser processing machine according to the present invention.

FIG. 2 is a graph showing a movement of a processing head by a synchronous Z-axis control method for a laser processing machine according to the present invention.

FIG. 3 is an example of a program in a conventional NC device.

FIG. 4 is a graph showing a basic movement state in the synchronous Z-axis control method for the laser beam machine according to the present invention.

FIG. 5 is a graph showing a state at the beginning of a Z-axis lowering operation.

FIG. 6 is a graph showing an operation when a start position is higher than an ascending point at the start of a program.

FIGS. 7A to 7C are graphs showing an operation in the case of a work shooter command;

FIG. 8 is a graph showing an operation in the case of a machine stop command.

FIG. 9 is a graph showing an operation when a fast-forward command is issued twice or more.

FIG. 10 is a graph showing movement of a processing head by conventional Z-axis control.

FIG. 11 is a graph showing movement of a processing head by conventional Z-axis control.

FIG. 12 is a graph showing movement of a processing head by conventional Z-axis control.

FIG. 13 is an explanatory view showing a conventional state of collision between a processing head and a product or the like.

[Explanation of symbols]

 3 Processing head 9 NC device 11 PMC

Claims (2)

[Claims] 1. A synchronous Z of a laser processing machine for performing laser processing on a work by moving a processing head with respect to the work in an X-axis and / or a Y-axis direction and a Z-axis direction by an NC device.
In the axis control method, an X-axis and / or a Y-axis direction movement is commanded by a program of the NC device, and when the movement command from the NC device is a fast-forward movement command, a fast-forward movement start signal is received and the laser beam is simultaneously transmitted. An ascending command in the Z-axis direction is issued by the PMC provided in the processing machine.
A synchronous Z-axis control method for a laser beam machine, wherein a lowering instruction in the Z-axis direction is issued. 2. A synchronous Z of a laser processing machine for performing laser processing on a work by moving a processing head with respect to the work in an X-axis and / or Y-axis direction and a Z-axis direction by an NC device.
An axis control device, wherein when the NC device issues a fast-forward movement start command in the X-axis and / or Y-axis directions, a Z-axis direction ascending command is issued. A synchronous Z-axis control device for a laser beam machine, comprising a PMC for issuing a direction descending command.