JPH08215874A - Laser beam machine - Google Patents

Abstract

PURPOSE: To simplify an operation for replacing a torch by detecting a cutting torch or a welding torch and thereby performing machining coincident with the torch thus detected. CONSTITUTION: Pins 112, 142 for discriminating the kind of torch are attached above each torch 110, 140. The pin 112 for discriminating a cutting torch 110 is positioned oppositely to a pin inserting hole 82, and the pin 142 for discriminating a welding torch 140 is positioned oppositely to a pin inserting hole 86. Proximity switches 84, 88 adjacent to the pin inserting holes 82, 86 are fixed with a bracket 85, with the output of these switches made switchable by the presence/ absence of the pins 112, 142 inserted in these holes 82, 86. If the pin 112 is detected by the proximity switch 84, the cutting torch 110 is attached to a combination head 66, and if the pin 142 is detected by the proximity switch 88, the welding torch 140 is attached to the combination head 66.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser processing machine for cutting or welding a work by utilizing a laser beam.

[0002]

2. Description of the Related Art A laser beam used in a laser beam machine is usually linearly polarized, and when the laser beam is used for cutting, there is a problem that the processing quality varies depending on the combination of the cutting direction and the polarization direction. Therefore, in the case of a laser processing machine for cutting, an optical system for converting linearly polarized light into circularly polarized light is required. Further, in the case of a laser processing machine for welding, it is required to vibrate the laser beam finely along the welding line, and a scanner mirror is required in the optical system. As described above, the laser processing machine for cutting and the laser processing machine for welding usually have different optical systems, so that welding processing by the cutting laser processing machine or cutting processing by the welding laser processing machine is performed. You cannot do it.

In Japanese Patent Laid-Open No. 61-165289, 1
A proposal has been disclosed that enables cutting and welding with a laser processing machine of a table. This proposal proposes a cutting head equipped with an optical system (for example, a polarization part for circularly polarized light) required for a laser processing machine for cutting in one laser processing machine, and an optical system required for a laser processing machine for welding ( (Eg scanner mirror)
A welding head provided with is provided, and one of the two heads is selected and used.

In cutting and welding, it is necessary to change the relative positional relationship between the head and the work, and a multi-axis control mechanism is required. The most typical multi-axis control mechanism has an X-axis moving body that is movable in the X-axis direction attached to a fixed part, and is movable in the Y-axis direction with respect to the X-axis moving body. And a Z-axis moving body that is movable in the Z-axis direction is attached to the Y-axis moving body. With this configuration, the Z-axis moving body is moved in the X, Y, and Z axis directions.
In addition to this, the fourth, fifth, etc. axes may be provided to control the attitude of the head. The head is fixedly attached to the final control, i.e. the part affected by the movement of all moving bodies. This controls the position and / or posture of the head in space.

In the method described in Japanese Patent Application Laid-Open No. 61-165289, that is, a method in which two heads, a cutting head and a welding head, are assembled in one laser processing machine,
A multi-axis control mechanism is required for each head, which is expensive in the end. Instead of providing two sets of multi-axis control mechanisms, a method is considered in which the cutting head and the welding head can be selectively attached to and detached from one set of multi-axis control mechanisms. 10 and 11 show the shape of the head when the heads are replaced, FIG. 10 shows the cutting head, and FIG.
Reference numeral 1 indicates a welding head. In the figure, reference numeral 300 denotes a final control section of the multi-axis control mechanism, and 354 denotes a head mounting section. Reference numeral 352 in the drawing denotes a head rotation motor. In FIG. 10, 310 is a cutting head, 356 is a fifth motor, 360 is a belt, 362 is a pulley, and 36 is a belt.
Reference numeral 0 represents a block having a built-in light converging system, 320 represents a cutting torch, and 322 represents a gap control motor.
In this case, since the optical system is incorporated in the head to be replaced, the accuracy required by the operator when the head is replaced is increased, and the operation takes time. FIG. 11 shows a welding head, and 466 is a block with a built-in scanner mirror,
Reference numeral 476 is a scanner mirror motor, and 450 is a welding torch. Even in this case, since the head 440 to be replaced includes the optical system, it is difficult to replace the head with a simple operation.

[0006]

According to this method, it is not necessary to use two sets of multi-axis control mechanisms. However, according to this method, since an optical system for laser light is attached to each head, high accuracy is required for the mounting position of each head, and head replacement work becomes very troublesome and difficult. Further, the structure of the portion where each head is detachably attached to the multi-axis control mechanism becomes complicated. The present invention proposes a technique that does not require two sets of multi-axis control mechanisms and that simplifies the work when switching between cutting and welding.

[0007]

A laser beam machine according to the present invention is fixedly attached to a final control section of a multi-axis control mechanism, and is irradiated with laser light from a laser oscillator onto a surface to be machined. A composite head having a built-in optical system for condensing and having a torch mounting portion at its tip, a cutting torch and a welding torch that are selectively attachable to and detachable from the torch mounting portion, and are provided in the composite head, A torch attached to the torch mounting portion is provided with a detection means for detecting whether the torch is a cutting torch or a welding torch, and a processing execution means for executing processing matching the torch detected by the detection means. There is.

Here, the final control section of the multi-axis control mechanism means a portion affected by the movements of all the control axes. For example, in the case where the Y-axis moving body is attached to the X-axis moving body, the Y-axis moving body is attached. The moving body itself or a portion that moves together with the Y-axis moving body. In addition, Z on the Y-axis moving body
In the case where the shaft moving body is attached, it means the Z-axis moving body or a portion that moves together with the Z-axis moving body. Further, in the case where the control shaft for the approach angle is attached to the Z-axis moving body, it means the part where the approach angle is finally controlled.
Further, being fixedly attached means that it is attached so as not to be detached in a normal use state, and includes, for example, a mode in which it can be removed for repair or the like.

[0009]

With the above arrangement, only one set of multi-axis control mechanism is required. The optical system that guides the laser light from the laser oscillator to the surface to be processed through the composite head is fixedly attached to this multi-axis control mechanism, and the position of the optical system is changed when switching between cutting and welding. It does not take a long time to adjust the accuracy. The torch is replaced when switching between cutting and welding. In this case, since the torch does not have an optical system built therein, the positional accuracy at the time of replacement may be relatively low, and the replacement work is simplified. Also, the mechanism for detachably attaching the torch is simplified.

[0010]

Preferable means for solving the problem and its operation In the above laser beam machine, a discriminating means for discriminating whether the operating program to be executed is a cutting program or a welding program, a detection result of the detecting means and the discriminating means. It is preferable that a means for comparing the discrimination results of 1 is added.

In this case, the detecting means detects whether the cutting torch is attached or the welding torch is attached. Further, the determining means determines whether the program to be executed is for cutting or for welding. Whether the cutting torch is attached at the time of executing the cutting program, the welding torch is attached at the time of executing the welding program (the above is normal), or the welding is executed at the time of executing the cutting program by the comparison means. The torch is attached, or the cutting torch is attached when the welding program is executed (abnormal if above). For this, a mismatch between the program and the torch type is confirmed in advance.

A scanner mirror and a drive mechanism for vibrating the scanner mirror are attached to the composite head of the laser beam machine. When the welding torch is attached to the composite head, the drive mechanism operates to operate the composite head. When the cutting torch is attached to, the drive mechanism thereof is preferably stopped. In this case, the optics are attached to the composite head and the advantage of the torch being independent of the optics is maintained. Moreover, when the welding torch is attached, the laser beam vibrates finely around the welding line due to the vibration of the scanner mirror, and when the cutting torch is attached, the scanner mirror stops and the laser beam is cut. Move along. In this way, both good welding and good cutting are performed.

Further, an assist gas supply port is provided in the composite head of this laser beam machine, and when a welding torch is attached to the composite head, an inert gas is supplied from the assist gas supply port, When a cutting torch is attached to the composite head, oxygen gas is preferably supplied. In this case, it is not necessary to connect the assist gas supply path to the torch, and the work of replacing the torch is simplified.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment embodying the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view of the laser processing machine of this embodiment. First, a multi-axis control mechanism that controls the relative positional relationship between the composite head 66 and the workpiece will be described. In the figure, 2 is a base, which is fixed to the foundation. On the upper surface of the base 2, a pair of rails 4a and 4b are fixed in parallel. The longitudinal direction of the rails 4a and 4b will be referred to as the X-axis 12 below.
Called direction. X table 10 is placed on rails 4a and 4b.
It is mounted so as to be movable in the direction of the shaft 12. X on base 2
The shaft motor 6 is fixed, and the X-axis feed screw 8 is rotated by the X-axis motor 6. The X-axis feed screw 8 extends in the X-axis direction. The X-axis feed screw 8 is screwed with a bracket fixed to the lower surface of the X-table 10. With this configuration, the X table 10 is moved by the X-axis motor 6 to the X-axis.
It is moved in the direction of the axis 12.

A pair of posts 14a, 14b from the base 2
Is installed vertically. The beam 16 extends between the upper ends of the posts 14a and 14b. The beam 16 extends in the direction orthogonal to the X axis. Hereinafter, the longitudinal direction of the beam 16 is referred to as the Y axis 24. A pair of Y-axis rails (not shown) are fixed in parallel to the beam 16 in the Y-axis 24 direction. The Y-axis rail movably supports the Y-axis moving body 22 in the Y-axis 24 direction. A Y-axis motor 18 is fixed to the beam 16, and the Y-axis motor 18 rotates the Y-axis feed screw 20. The Y-axis feed screw 20 extends in the Y-axis direction. The Y-axis feed screw 20 is screwed into the Y-axis moving body 22. With this configuration, the Y-axis moving body 22 moves the Y-axis motor 18
Is moved in the Y-axis 24 direction.

A pair of Z-axis rails (not shown) extend in parallel with the Y-axis moving body 22. This Z-axis rail is X-axis 1
2. It extends in a direction orthogonal to both axes of the Y axis 24. Hereinafter, this is referred to as the Z-axis 32 direction. With this Z-axis rail, Z
The axial moving body 30 is supported so as to be movable in the Z-axis 32 direction. A Z-axis motor 26 is fixed to the Y-axis moving body 22, and the Z-axis feed screw 28 is rotated by the Z-axis motor 26. The Z-axis feed screw 28 extends in the Z-axis 32 direction. The Z-axis feed screw 28 is screwed into the Z-axis moving body 30. With this configuration, the Z-axis moving body 30 can move the Z-axis motor 2
6 is moved in the Z-axis 32 direction.

As can be understood from the above, the Z-axis moving body 3
0 is moved in the Y-axis 24 direction by the Y-axis motor 18, and Z
It is moved in the Z-axis 32 direction by the shaft motor 26. On the other hand, since the X-table 10 is moved in the X-axis 12 direction by the X-axis motor 6, the Z-axis moving body 30 and the X-table 10 are XYZ.
It is possible to move relative to each other.

FIG. 2 is an enlarged view showing the vicinity of the lower portion of the Z-axis moving body 30. A fourth motor 52 is fixed to the Z-axis moving body 30. The fourth moving body 54 is rotatable with respect to the Z-axis moving body 30 about an axis 55 parallel to the Z-axis 32. The fourth moving body 54 and the fourth motor 52 are connected by a gear (not shown), and the fourth moving body 54 rotates the fourth moving body 54 around the fourth shaft 55.

A composite head 66 is rotatable around a horizontal axis 65 on the fourth moving body 54. A fifth motor 56 is fixed to the fourth moving body 54, and a belt is stretched between the fifth motor 56 and the composite head 66. In the figure, 64 indicates a belt cover.

FIG. 3 is an enlarged sectional view of the vicinity of the composite head 66. The composite head 66 is rotatable about the fifth shaft 65 with respect to the fourth moving body 54 via a bearing 68. A belt 60 is hung between the pulley 58 of the fifth motor 56 and the pulley 62 fixed to the composite head 66. To this end, the compound head 66 is rotated about the fifth axis 65 by the fifth motor 56. The direction of the approach vector 67 of the composite head 66 is adjusted by the fourth motor 52 and the fifth motor 56.

From the above, the composite head 66 is fixed to the X table 10 under the influence of all of the X-axis motor 6, the Y-axis motor 18, the Z-axis motor 26, the fourth motor 52, and the fifth motor 56. The relative position and posture of the workpiece is controlled. That is, the composite head 66 is fixed to the final control section of the multi-axis control mechanism.

Next, the optical system of laser light will be described.
In FIG. 1, reference numeral 34 denotes a laser oscillator, which oscillates a linearly polarized laser beam 36a. The laser oscillator 34 oscillates in multimode. The oscillated laser light 36a is reflected by the mirrors 38, 40, 42, 44, 46, 4
It is made incident on the Z-axis moving body 30 by 8. Further, since the mirror 48 moves in the Z-axis 32 direction in conjunction with the Z-axis moving body 30, no matter where the Z-axis moving body 30 is adjusted in the Y-axis 24 or Z-axis 32 direction, the laser beam 36b will not be emitted. The light enters the mirror 50 in the Z-axis moving body 30.

The above-mentioned mirror 44 is a circular polarization mirror, and this circular polarization mirror 44 converts the linearly polarized laser light 36a into the circularly polarized laser light 36b. Therefore, the laser light 3 incident on the Z-axis moving body 30
6b is circularly polarized. Z-axis moving body 30
The laser light incident on is reflected by the mirror 50, travels downward along the Z axis 32, and is incident on the fourth moving body 54.

As shown in FIG. 3, a parabolic mirror 70 is fixed to the lower end of the fourth moving body 54. The parabolic mirror 70 has two functions, one of which reflects the laser light and makes the laser light incident on the composite head 66. The other function is to focus the laser light on a parabolic surface. As will be described in detail later, the beam diameter of the laser light is gradually reduced after being reflected by the parabolic mirror 70,
The light is collected near the torch outlet described below. Note that the laser light only passes through the torch, and the torch does not affect the laser light path.

As best shown in FIG. 3, a scanner mirror 72 is assembled inside the composite head 66. This scanner mirror is capable of vibrating within a minute range around an axis 72a extending perpendicularly to the plane of the drawing, and causes the laser light to vibrate slightly within the drawing of FIG. 3 (see also FIG. 7). The vibration shaft 72a of the scanner mirror 72 is connected to the scanner motor 76 shown in FIG. 2, and the scanner motor 76 is attached to the composite head 66.
When the scanner motor 76 is not used, the scanner mirror 72 is maintained at the neutral angle shown in FIG. This neutral angle has an inclination of 45 ° and reflects light incident from the horizontal direction vertically downward. As described above, since the laser light is condensed by the parabolic mirror 70, the beam diameter of the laser light reflected by the scanner mirror is gradually narrowed.

As described later, either the cutting torch 110 or the welding torch 140 is attached to the composite head 66. Each of the torches has a tubular shape, and the laser light reflected by the scanner mirror 72 passes through the torch. That is, the torch has nothing to do with the path of the laser beam. When the torch is attached to the composite head 66, the laser light is set to have a positional relationship in which it is focused at the tip of the torch.

In the case of the present invention, all of the optical system that influences the path of the laser light is incorporated up to the composite head 66,
No optical system is built into the torch. The cutting point and the welding point are determined by the focal position of the laser beam, but the torch has no influence on this focal position. For this reason, the required accuracy regarding the mounting position of the torch is kept relatively low.

In FIG. 3, reference numeral 90 indicates a window through which the laser beam passes, and the window 90 is designed to prevent dust and the like generated due to the processing from entering the window 90 above it. Further, 92 indicates an argon gas supply port which is a kind of inert gas, and 94 indicates an oxygen gas supply port. Argon gas supply port 92 and oxygen gas supply port 9
4 are connected to an argon gas supply source 100 and an oxygen gas supply source 98 via a gas switching valve 96.

FIG. 3 shows a compound head 66 with a cutting torch 11.
The state where 0 is attached is shown. Next, the state of this mounting structure will be described with reference to FIGS. 4 shows a state in which the bottom plate 74 of the composite head 66 is viewed from above, and FIG. 5 shows a side view in which the cutting torch 110 is partially broken. Bottom plate 74
A circular hole 78 is provided in the. Further, bolt holes 80 are formed from the bottom surface side of the circular holes. Two pin insertion holes 82 and 86 are provided with different phases. Proximity switches 84 and 88 are mounted adjacent to the pin insertion holes 82 and 86, respectively.

The cutting torch 110 and the welding torch 140 shown in FIG. 6 are formed to have a common mounting portion for the composite head 66, and a cylindrical weir 116 (146) fitted in a circular hole 78 with a spigot. , The following welding torch 14
0) are shown in parentheses) and through holes 114 (144) located corresponding to the bolt holes 80.
As a result, the cutting torch 110 and the welding torch 140 can be replaced with the bottom plate 74 of the composite head 66. That is, by removing the bolt 130 shown in FIG. 6, the torch that has been attached up to that point can be removed, and after replacing the torch, tightening the bolt 130 completes the torch replacement. As mentioned above,
Since the torches 110 and 140 do not affect the path of the laser light and merely pass through the torches 110 and 140, the mounting accuracy using the inlay can be obtained.

Above the torches 110 and 140, type identification pins 112 and 142 are attached. The discrimination pin 112 of the cutting torch 110 is provided at a position corresponding to the pin insertion hole 82, and the discrimination pin 142 of the cutting torch 140 is provided at a position corresponding to the pin insertion hole 86. 6, the proximity switches 84 and 88 are fixed by the bracket 85 adjacent to the pin insertion holes 82 and 86, and the outputs of the proximity switches 84 and 88 are inserted into the pin insertion holes 82 and 86. It is switched depending on whether or not the discrimination pins 112, 142 are inserted. Proximity switch 84
If the detection pin 112 is detected, it is understood that the cutting torch 110 is attached to the composite head 66,
If the proximity switch 88 detects the determination pin 142,
It can be seen that the welding torch 140 is attached to the composite head 66.

A gap sensor shown in FIG. 5 is attached to the cutting torch 110. This gap sensor is electrically conductive with the conductive inner cylinder 120, the conductive tip 126 attached to the tip, and the conductive outer cylinder 12.
The inner cylinder 120 is insulated from the outer cylinder 122 by an insulator 124, and the outer cylinder 122 and the chip 126 are insulated from each other by an insulator 125.

The tip 126 is used in a positional relationship corresponding to the work with a gap. Since the outer cylinder 122, the chip 126, and the work are conductive and the gap is insulative, a capacitor is formed between the chip 126 and the work, and the capacitance of the capacitor changes depending on the length of the gap. . Therefore, the cutting torch 110 of the embodiment can detect the gap by the change in the capacitance of the capacitor between the tip 126 and the work. Further, the outer cylinder 122 functions as a guard electrode for stabilizing the capacitance of the capacitor between the chip 126 and the work. In the figure, reference numeral 118 is a signal line connector for detecting a capacitance change.

This connector 118 is provided between the composite head 66 and the torch 110 so that a cable for transmitting a capacity change is automatically connected when the cutting torch 110 is attached to the head 66. May be.
By doing so, the work of exchanging the cutting torch is further simplified. That is, it is not necessary to connect a cable, and only the operation of the bolt 130 is required. Chip 12
Since 6 is gradually damaged during cutting, it can be easily replaced by a screw.

FIG. 6 shows a welding torch 140.
The tip of this welding torch 140 is still the tip 15
6 can be replaced by screws. In the figure, reference numeral 148 is an assist gas supply port, which is used in combination with the supply of the assist gas from the supply port 92 provided in the head 66 itself. The assist gas supply port 148 is not necessarily indispensable because the supply port provided in the head 66 itself is often sufficient.

The tip opening 126a of the tip 126 of the cutting torch 110 has a diameter of the tip 15 of the welding torch 140.
The diameter is smaller than the diameter of the tip end opening 156a of No. 6, and the gas pressure in the torch is higher than the gas pressure during welding during cutting.

FIG. 7 shows the function of the scanner mirror 72 during the welding process, in which the laser light is vibrated at the focus position as indicated by arrow 166. At this time, the relative positional relationship between the work and the torch is moved along the welding line 164 by the multi-axis control mechanism, so that the laser beam has a zigzag pattern with respect to the works 160 and 162, as shown in the figure.
This allows good welding. During the cutting process, the scanner mirror 72 is fixed at the neutral position and is reflected and condensed as shown by the solid line in the figure.

FIG. 8 is a system block diagram showing the control system of this laser processing machine. In the figure, 236 is a CPU, to which the outputs of the proximity switches 84 and 88 are input,
By the CPU 236, it is possible to determine whether the cutting torch or the welding torch is attached to the composite head 66.

Reference numeral 218 in the drawing denotes an operation panel, which allows an operator to select an operation program using buttons 228, 230, 232 and 234. That is, since a plurality of welding programs and cutting programs are prepared for various works, the programs are selected with this button. Further, by switching the changeover switch 220, it is possible to select whether to perform cutting work or welding work. Reference numeral 226 indicates a start button. The signal from the operation panel 218 is input to the CPU 236. CPU2
Reference numeral 36 controls the laser oscillator 34 and the multi-axis control mechanism. That is, the voltage P indicating the output value of the laser light is output to the laser oscillator 34. This allows the laser oscillator 3
4 outputs are controlled.

Reference numeral 202 in the drawing denotes a servo CPU for controlling the X-axis motor 6, which is a rotation angle signal θ1 output from the CPU 236 and a rotation angle signal detected by an encoder 204 attached to the X-axis motor 6. The X-axis motor 6 is controlled so that a1 is matched. Similar control circuit, Y
It is also provided on the axis, the Z axis, the fourth axis, and the fifth axis. In this way, the CPU 236 causes the work and the composite head 66 to
The relative positional relationship of can be controlled. 214 in the figure
Is a function generator for setting the vibration angle of the scanner mirror 72, and its output is the driver 2
16 and the scanner motor 76 is driven.

The operation of this controller will be described below. First, the operator selects switches 228, 23 according to the type of work.
Use 0, 232, 234 to select the operating program for that work. Next, the operator inputs by switch 220 whether the program is for cutting or welding. The switch 220 may be omitted if the operation program includes a program for determining the type of machining. In the case of FIG. 8, it is determined from the state of the switch 220 whether the cutting program or the welding program has been selected.

When the start switch 226 is operated (see FIG. 9).
If S1 is YES), the CPU 236 causes the memory 23
The process is started according to the 0 program. First, the outputs of the switches 84 and 88 are input to determine which torch is attached (S2). Then switch 2
20 output is input to determine the program type (S
3). After that, the torch type and the program type are compared (S4).

When it is found from the switches 84 and 88 that the cutting torch is attached, and when it is found from the switch 220 that the cutting program is to be executed next, the correspondence between the torch and the machining type is correct (S5). To S
6) The actual processing is started. At this time, the CPU 23
6 continues to stop the scanner motor 76 (S6).
Therefore, the scanner mirror 72 is fixed at the neutral position. During the cutting process, the gas switching valve 96 shown in FIG. 3 is switched, and oxygen from the oxygen gas supply source 98 is blown into the head 66 and the torch 110 (S7). after this,
The CPU 236 controls the laser oscillator 34 and the multi-axis control mechanism according to the selected operation program. This causes the programmed cutting process. Since the laser light is circularly polarized by the circular polarization mirror 44, good cutting quality can be obtained regardless of the direction. During the cutting process, the feedback control of the gap is performed by the gap sensor, and the gap control is performed. In this embodiment, this gap control is performed by controlling all five axes and moving the cutting torch 110 in the approach direction by the gap correction amount. Note that a sixth shaft dedicated for moving the cutting torch 110 up and down may be provided for adjusting the gap. When the gap amount is adjusted using all five axes as in the present embodiment, the entire optical system is moved, so that not only the gap between the torch tip and the work is adjusted, but also the focus of the laser beam is adjusted. It can be adjusted. When the six axes are separately provided, only the gap between the torch tip and the work is adjusted.

In step S4, the switches 84, 8
Even if it is found from the output of No. 8 that the welding torch is attached and that the welding program is selected by the switch 220, the machining program and the torch type are correct, so the operation program is continuously executed. To be done. At this time, the CPU 236 drives the scanner motor 76 via the driver 216, and the scanner mirror 72 is machined while vibrating finely (S9). Further, during the welding process, the argon gas from the argon gas supply source 100 is blown into the head 66 and the torch 140 by the switching valve 96 (S10). Since welding is performed in this state, good quality welding is performed. Since the laser light is circularly polarized, uniform welding is performed regardless of the direction.

If the torch type discriminated by the switches 84 and 88 and the machining type discriminated by the switch 220 do not match, a mismatch has occurred. Therefore, the operator is warned from the display section (not shown) of the operation panel 218. An arousal signal is displayed (S12). This allows the operator to know in advance the torch type mismatch.

In the case of the present embodiment, the CPU 236 is programmed to execute the step S3, so that means for discriminating the type of the operation program is realized.
By being programmed to execute step S4, means for comparing the torch type with the program type is realized, and by being programmed to execute steps S6 and S9, the scanner mirror is operated during welding processing. Then, a means for stopping the scanner mirror during cutting is realized, and by being programmed to execute steps S7 and S10, an inert gas is supplied to the head during welding and oxygen gas is supplied during cutting. Means are configured.

[0047]

According to the present invention, since the torch that needs to be replaced at the time of cutting and at the time of welding is independent of the optical system, the accuracy of the mounting position required when replacing the torch may be low. This simplifies the work and simplifies the structure of the replaceable mounting part. Furthermore, one set of multi-axis control system will be enough, and it is inexpensive and easy to use.
A welding / combining processing machine can be obtained. Moreover, since only the torch is replaced, the elements required for other machining do not interfere during each machining. Therefore, the same processing as the dedicated machine for each processing can be performed. Further, even when the torch is replaced, the program matching the torch type is executed, so that the operator can prevent a mistake in replacement. According to the second aspect, even if there are a plurality of programs for each machining, since the machining is performed by comparing the torch and the program, reliable machining can be performed. According to the third aspect, the scanner mirror is driven only when necessary, and in other cases, it is simply used as the reflecting mirror, so that the torch portion that needs to be replaced can be further simplified. In the fourth aspect, since the assist gas supply port is provided in the composite head, the torch portion can be simplified.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an embodiment.

FIG. 2 is an enlarged perspective view near a composite head.

FIG. 3 is an enlarged cross-sectional view near the composite head.

FIG. 4 is a plan view of a composite head bottom plate.

FIG. 5 is a partially cutaway view of the cutting torch.

FIG. 6 is a sectional view when a welding torch is attached to the composite head.

FIG. 7 is a diagram illustrating how the scanner mirror operates.

FIG. 8 is a block diagram showing a control system of an embodiment.

FIG. 9 is a processing procedure diagram of an embodiment.

FIG. 10 is a perspective view of a cutting head in the related art.

FIG. 11 is a perspective view of a welding head in the related art.

[Explanation of symbols]

 6 X-axis motor 10 X-table 18 Y-axis motor 22 Y-axis moving body 26 Z-axis motor 30 Z-axis moving body 66 Composite head 72 Scanner mirror 76 Scanner motor 84 Cutting switch 88 Welding switch 92 Argon gas supply port 94 Oxygen Gas supply port 110 Cutting torch 140 Welding torch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Kume 1-1, Asahi-cho, Kariya city, Aichi Toyota Koki Co., Ltd. Incorporated (72) Inventor Kazuhiro Totsuka 1 Toyota-cho, Toyota-shi, Aichi Toyota Automobile Co., Ltd.

Claims (4)

[Claims] 1. A multi-axis control mechanism, which is fixedly attached to a final control unit, has an optical system for entering a laser beam from a laser oscillator and condensing the laser beam on a surface to be processed, and has a torch at the tip. A composite head having a mounting portion, a cutting torch and a welding torch that are selectively attachable to and detachable from the torch mounting portion, and a torch provided on the composite head and attached to the torch mounting portion is a cutting torch. A laser beam machine comprising: a detection means for detecting whether there is a torch for welding or a welding torch; and a processing execution means for executing a processing matching the torch detected by the detection means. 2. A multi-axis control mechanism, which is fixedly attached to a final control unit, has an optical system for entering a laser beam from a laser oscillator and condensing the laser beam on a surface to be processed, and has a torch at the tip. A composite head having a mounting portion, a cutting torch and a welding torch that are selectively attachable to and detachable from the torch mounting portion, and a torch provided on the composite head and attached to the torch mounting portion is a cutting torch. Detecting means for detecting whether there is a welding torch or not, a determining means for determining whether the operating program to be executed is a cutting program or a welding program, and a torch detected by the detecting means and the determination Comparing means for comparing the type of machining determined by the means, and the torch compared by the comparing means with the type of machining Laser processing machine, characterized in that a machining execution means for executing the corresponding processing and the type of engineering. 3. A scanner mirror and a drive mechanism for driving the scanner mirror are attached to the composite head, and the processing execution means attaches the cutting torch to the composite head to perform a cutting process. The driving mechanism is stopped, the welding torch is attached to the composite head, and the driving mechanism is operated when welding is performed. Laser processing machine. 4. The composite gas is provided with an assist gas supply port, and the processing execution means is provided with the assist gas supply when the cutting torch is attached to the composite head to perform a cutting process. The oxygen gas is supplied from a mouth, the welding torch is attached to the composite head, and when performing welding, an inert gas is supplied from the assist gas supply port. Item 2. A laser beam machine according to item 2.