JPH01113194A - Laser beam machine controller - Google Patents

Abstract

PURPOSE:To enable the movement in the optical axis direction of a machining head and to better the user facility by providing the means moving a machining head in the projecting direction of a laser light based on the moving command in the optical axis direction in a machining program. CONSTITUTION:In case of an automatic mode the input of a machining program is executed (step 21), then the work program is analyzed (step 22) and the movement amt. of each axis (X, Y, Z, alpha, beta axes) is calculated (step 23). The value thereof is outputted to each axial motor Mx, My, Mz... through the servoamplifier 16x, 16y, 16z... of each axis. A process 27 decides as to whether the optical axis moving command is inputted or not in the program following the work program analysis processing process 22 in the automatic mode. When the optical axis direction moving command is decided inputted, the vector decomposition processing process 26 of a manual mode is taken and processed similar to the case of manual mode. If the optical axis direction moving command is found not inputted yet in the process 27 in opposition, each axis movement amt. calculating process 23 is taken as it is and the movement of each axis is executed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention moves the processing head of a laser beam machine in the laser beam irradiation direction (optical axis direction) not only in manual mode but also in automatic mode. The present invention relates to a laser processing machine control device that is obtained.

[Conventional technology] Figure 8 is a system configuration diagram of a conventional three-dimensional laser processing machine control device. In the figure, 1 is the base of the processing table, and 2 is the axis table; 3 is a drive motor for the X-axis table 2; 4 is a Y-axis table that moves linearly in the Y-axis direction on the X-axis table 2 by a drive motor (not shown); 5 is a lifting axis (Z-axis);
6 is a frame that supports the lifting shaft protection cover 5; 7 is a first rotation axis (α axis) that rotates around the lifting shaft (2 axes); 8 is the α axis A second pivot shaft (
β-axis), 9 is a processing head attached to the tip of the β-axis 8 and is irradiated with laser light, and 10 is a CO2 for processing.
A laser oscillation device, 11 is a laser beam guide tube for sending the laser beam emitted from the laser oscillation device 10 to a processing machine, 1
2 is a control device, 13 is an automatic programming device, and 14 is a switch for moving the processing head 9 in the optical axis direction in the manual mode, which is provided on the operation panel 15 of the control device 12.

FIG. 9 is an enlarged view of the optical axis direction movement switch 14. In the figure, 14a is a plus switch for moving the processing head 9 forward in the optical axis direction, and 14b is a minus switch for moving the processing head 9 backward in the optical axis direction.

Next, the operation will be explained.

An NC program created by an automatic programming device 13 or the like for a laser processing machine is applied to the control device 12 and operated. In this case, the control device 12 moves the X-axis table 2 in the X-axis direction when there is a movement command for axis address X, and moves the Y-axis table 4 in the Y-axis direction when there is a movement command for axis address Y. When there is a movement command for axis address Z, the vertical axis is moved in the z-axis direction, and when there is a movement command for axis address α, the first rotation axis 7 is rotated in the α-axis direction, and the axis address β is moved. When there is a command, each axis is controlled so that the second rotation axis 8 is rotated in the β-axis direction, and the machining head 9
move to the commanded position.

In the case of manual mode, the processing head 9 can be manually moved in the optical axis direction by pressing the optical axis direction movement switch 14 provided on the operation panel 15 of the control device 12.

FIG. 10 is a flowchart showing internal processing in the control device 12, and the above-mentioned operations are performed as follows. That is, in the automatic mode, first, a machining program is input using a machining tape or the like (step 21), then the machining program is analyzed (step 22), and each axis (X, Y, Z, α, β axis) is input. ) movement amount (
The amount of movement per unit time) is calculated (step 23).

The values are applied to the servo amplifiers 16x, 16y, and 16z for each axis.

... through the drive motors MX, My, and Mz of each axis.

It outputs to...

Next, in the case of manual mode, switch 1 on the operation panel 15
4 (step 24), the optical axis direction movement switch 1
4 is input (step 25), and if it is input, the amount of movement in the forward axis direction is x, y
, into vector components in the z-axis direction (step 26),
Proceeding to step 23 above, the amount of movement in each of the x, y, and z axes is calculated.

If the switch 14 is not pressed, the process directly proceeds to step 23 to calculate the amount of movement of each axis (X, Y, Z, α, β). The processing after step 23 is the same as in the automatic mode.

[Problems to be solved by the invention] Since the conventional laser processing machine control device is configured as described above, the only way to move the processing head in the optical axis direction is in manual mode, and the Movement in the optical axis direction could not be controlled. Therefore, when welding a cylindrical workpiece to a slope, for example, it is inconvenient to move the processing head closer to or away from the slope.

The present invention has been made to solve these problems, and provides a laser processing machine control device that allows the processing head to be easily moved in the optical axis direction not only in manual mode but also in automatic mode. The purpose is to obtain.

[Means for Solving the Problems] The laser processing machine control device according to the present invention includes means for determining whether an optical axis direction movement command is included in the NC program, When the command is not included, the process is configured to proceed to the vector decomposition processing step in manual mode, and when the command is not included, the process is configured to immediately proceed to the step for calculating the amount of movement of each axis.

[Function] In the laser processing machine control device according to the present invention, in automatic mode, a processing program is input, the processing program is analyzed, and it is determined whether or not the program includes an optical axis direction movement command. Then, when an optical axis direction movement command is included, by moving to the vector decomposition processing step in manual mode, the amount of movement of the processing head in the optical axis direction is changed from the posture of the α and β axes to x, y, and z. Decompose it into vector components in the axial direction and calculate the amount of movement in each x, y, and z axis,
This controls the movement of the processing head in the optical axis direction. On the other hand, if the optical axis direction movement command is not included, the processing immediately proceeds to the step of calculating the movement amount of each axis and moves the processing head as in the conventional case.

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

FIG. 1 is a flowchart showing internal processing of a control device according to the present invention. In the figure, numbers 21 to 26 are the 10th
It is the same as shown in the figure. 27 is a step after the machining program analysis step 22 in the case of automatic mode, in which it is determined whether an optical axis direction movement command is input in the program. If it is determined in this step 27 that an optical axis direction movement command has been input, the process proceeds to a manual mode vector decomposition processing step 26, and is processed in the same manner as in the manual mode. Conversely, if the optical axis direction movement command is not input in step 27, the process directly advances to each axis movement amount calculation step 23, where each axis is moved as described above.

Next, FIG. 2 is an enlarged view of the processing head portion in use, and FIG. 3 is a side view thereof. As shown in the figure, the lifting shaft 17 can move up and down in the Z-axis direction, and a first turning axis (α axis) 7 is coaxially attached to the lower end of this lifting shaft 17. A first rotating body 18 that rotates is attached to the lower end of this rotating shaft 7 in a perpendicular state. Further, a second rotating shaft (β axis) 8 is coaxially fitted into the first rotating structure 18, and the processing head 9 is connected to a second rotating structure 19 which has a built-in pend mirror (not shown) at the end of this rotating shaft 8. It is attached via. Reference numeral 20 denotes a workpiece in which a cylindrical body 20b is circumferentially welded to the inclined surface of a plate material 20a using a laser beam 21.

Next, the operation of the above embodiment will be explained with reference to the flowcharts of FIGS. 4 and 5.

In FIG. 4, when a machining program is input in step 31, it is then determined whether the machining program is finished (step 32), and if it is finished, the process proceeds to step 37 to end this process. If not finished, step 3
Proceed to step 3 and set each axis (in this example, x, y, z,
The amount of movement of the six axes (α, β, and optical axis) is calculated. Next, in step 34, it is determined whether this command is an optical axis direction command, and if it is an optical axis direction command, the process proceeds to step 35, where the amount of movement in the optical axis direction is calculated. Otherwise, the process proceeds to step 36 and outputs the amount of movement of each axis. The processing from step 31 to step 36 described above is performed for each command to complete one program.

Further, the calculation process of the amount of movement in the optical axis direction in step 35 is further performed as shown in FIG. First, the first
The angle of the rotation axis (α-axis) 7 is determined (step 35a), and the amount of movement of the vertical axis (z-axis) 17 is determined from this angle (step 35b). Next, the angle of the second rotation axis (β axis) 7 is determined (step 35c), and the amount of movement of the X and Y axes is determined from this angle (step 35b).

Figure 6 shows the case where the amount of movement in the x, y, and z axes is calculated by vector calculation from the angles α1°β1 of the first and second rotation axes when the amount of movement in the optical axis direction ΔLp is specified on the program. This shows the algorithm. i.e. x, y
, z-axis movement amounts are respectively ΔX, ΔY, and ΔZF, these P P are given by the following equation.

ΔX −ΔL−31nα・CO8β1・ (1)F
F 1 ΔY−ΔL・SInα・Slnβ1・ (2) P
P t ΔZ SanΔL−CO8α1 ...(3)
P According to the above, the processing head 9 can be moved in the optical axis direction even in the automatic mode. Therefore, as shown in FIG.
When welding, etc., when the processing head 9 enters a narrow space within the cylindrical body 20b or retreats from it, simply determining the amount of movement in the optical axis direction prevents the processing head 9 from interfering with the cylindrical body 20b. It is possible to easily move it closer to or away from the welding part without causing any damage.

In the above embodiment, the amount of movement in the optical axis direction is inputted into the processing program to change the amount of movement to X.

Although the case where the vector is decomposed and moved in the Y and Z axis directions has been described, the present invention is not limited to this case.
For example, as shown in FIG. 7, X, Y.

By commanding the value of one axis of the z-axis, the processing head 9 can be moved to the commanded value (points 41, 42° 43) on the optical axis 40, and the same effect can be achieved.

[Effects of the Invention] As described above, according to the present invention, the processing head can be moved in the optical axis direction in the automatic mode as well as in the manual mode, so it is easy to use.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing internal processing according to an embodiment of the present invention, FIG. 2 is an enlarged view of the processing head portion in use, FIG. 3 is a side view of the same, and FIGS. 4 and 5 are operations of the present invention. FIG. 6 is an explanatory diagram of the algorithm for calculating the amount of movement in the x, y, and z axes relative to the amount of movement in the optical axis direction. FIG. 7 shows another example of optical axis direction movement control. 8 is a system configuration diagram of a conventional laser processing machine control device, FIG. 9 is an enlarged view of the optical axis direction movement switch in FIG. 8, and FIG. 10 is an internal processing of the control device in FIG. 8. It is a flowchart which shows. 9... Processing head 12... Control device 21... Processing program input means 22... Processing program analysis means 23... Optical axis direction movement switch input means 24...
Optical axis direction movement switch input determination means 25... Vector decomposition processing means 26... Each axis movement amount calculation means 27... Optical axis direction movement command input determination means Note that the same reference numerals in the drawings are the same. or a significant portion. Agent Patent Attorney Muneharu Sasaki

Claims (1)

[Claims] In a device that controls a processing head of a laser processing machine over five or more axes, the control device includes means for moving the processing head in a laser beam irradiation direction (optical axis direction) based on an optical axis direction movement command in a processing program. A laser processing machine control device comprising: