JPH0357581A - Laser beam welding machine - Google Patents

Abstract

PURPOSE:To improve optical axis adjusting accuracy at the time of welding by providing a rotary table to mount a laser beam splitting part, fiber optical parts and laser beam emitting optical parts at the positions in opposition. CONSTITUTION:The laser beam welding machine is provided with the rotary table part 9 which mounts the laser beam splitting part 2 to split a laser beam, the fiber optical parts 3a and 3b to lead the laser beam to machining points in opposition on workpieces 5a and 5b and the laser beam emitting optical parts 4a and 4b and rotates around the workpieces 5a and 5b. An optical axis of the workpieces 5a and 5b held by collect chucks 6a and 6b is adjusted by a Z stage and an X-Y stage 8. The laser beam is split equally and emitted from the laser beam emitting optical parts to the machining points. The laser beam emitting optical parts move to the optional positions around the workpieces by the rotary table 9 while maintaining the positions in opposition mutually to perform spot welding. After spot welding, the laser beam emitting optical parts make a half-round around the workpieces to perform seam welding. By this method, thermal strain is offset and optical axis adjusting accuracy can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a laser welding machine, and particularly to a laser welding machine for adjusting and fixing the optical axis of a high-speed device for optical communication.

[Conventional technology]

A conventional laser welding machine has a length of 11L, including a laser oscillation unit that emits a laser beam, a processing optical unit that adjusts the focus of the laser beam at a processing point, a spindle unit that rotates a workpiece, and an arm. be reprimanded.

FIG. 2 is a configuration diagram showing a conventional laser welding machine.

The laser welding machine shown in Fig. 2 includes a laser oscillation unit 1 that emits laser light, and a processing optical system 2 that adjusts the focus at the processing point.
0, collet chucks 6a and 6b that hold the workpieces 5a and 5b, and X that adjusts the optical axis of the workpieces 5a and 5b.
- It includes a rotating arm 22 that supports the Z stage 7 on which the Y stage 8 is placed, and a spindle part 21 that rotates the rotating arm 22.

The spindle unit 21 rotates the rotary arm 22 supporting the Z stage 7 and the XY stage 8 by an arbitrary angle to determine the spot welding points of the workpieces 5a and 5b whose optical axes have been adjusted.

After temporary attachment by spot welding, the collet chuck 6a is opened, and the spindle portion 21 rotates only the collet chuck 6b once again to perform seam welding of the workpiece.

[Problem to be solved by the invention]

In the above-mentioned conventional laser welding machine, the arm that supports the stage for adjusting the optical axis in a cantilever rotates, and welding is performed with one beam, so mechanical distortion due to the weight of the cantilever arm and There was a drawback that the optical axis was shifted due to thermal strain imbalance during welding with two beams.

[Means to solve the problem]

The structure of the laser welding machine of the present invention includes a laser oscillation section that emits a laser beam, a laser beam splitting section that splits the laser beam, and a laser beam emitted from the laser beam splitting section that faces each other at a workpiece. The system includes a fiber optic section that guides the fiber optic to the processing point, an emitting optical section installed at the tip of the fiber optic section, and a rotary table section on which the emitting optical section is mounted and rotates around the workpiece. It is characterized by

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

The laser welding machine shown in FIG. , 5b are equipped with fiber optics 3a, 3b that lead to opposing processing points, emission optics 4a, 4b installed at the tips of the fiber optics, and emission optics 4a, 4b. The rotary table section 9 rotates around the rotary table section 9.

The workpieces 5a and 5b held by the collet chucks 6a and 6b have their optical axes adjusted by the Z stage 7 and the x-y stage 8.

The laser beam is divided into equal parts by the dividing optical part 2, guided by the fiber optical parts 3a and 3b, and emitted from the emitting optical parts 4a and 4b to the processing point.

The emitting optical parts 4a and 4b are moved to arbitrary positions around the workpieces 5a and 5b by the rotary table 9 to perform spot welding while maintaining positions facing each other. After spot welding, the emitting optical parts 4a and 4b perform seam welding by making a 1/2 turn around the workpieces 5a and 5b while maintaining positions facing each other.

〔Effect of the invention〕

The laser welding machine of the present invention is equipped with a rotary table equipped with a laser beam splitting section, a fiber optic section, and an emitting optical section at opposing positions, so that the workpiece can always be processed in the opposite direction without moving the workpiece. Since the points are irradiated with laser light at the same time, thermal distortion is canceled out, which has the effect of improving the accuracy of optical axis adjustment during welding.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional example. 1... Laser oscillation section, 2... Laser beam splitting section, 3a
, 5 3b...Fiber optical section, 4a, 4b...Emission optical section, 5a, 5b...Workpiece, 6a, 6b...Collet chuck, 7...Z stage, 8... X-Y
Stage, 9... Rotating table section, 10... Fixed arm, 20... Processing optical section, 21... Spindle section, 22... Rotating arm.

Claims (1)

[Claims] a laser oscillation section that emits a laser beam; a laser beam splitting section that splits the laser beam; a fiber optic section that guides the laser beam emitted from the laser beam splitting section to an opposing processing point on the workpiece; A laser welding machine comprising: a emission optical section installed at the tip of a fiber optic section; and a rotary table section on which the emission optical section is mounted and rotates around the workpiece.