JPS6356387A - Work holder for laser beam machine - Google Patents

Abstract

PURPOSE:To facilitate laser beam processing of different welding directions by mounting a turn table to a turning shaft of a stationary table and disposing a driving source for rotating a holding table to the turn table. CONSTITUTION:The turn table 8 is mounted to the turning shaft S of the stationary table 9 and the output shaft of a motor 10 is connected to the turning shaft S. A motor 11 to drive the T shaft of the holding table 7 is further disposed to the turn table 8. After a work 4 to be welded from the peripheral wall surface is mounted to the holding table 7, the motor 10 of the shaft S is rotated in an arrow (a) direction to tilt the turn table 8, then the welding in an optional angle direction by laser light 3 is executed. The shaft S is turned in an arrow (b) direction and the welding in a perpendicular direction is executed in the case of welding the contact surfaces of inside and outside materials 6b, 5b of the work 4b. The laser beam processing of the different welding directions is easily executed by the above-mentioned method.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a laser processing machine, and more particularly to an improvement of a workpiece holding device for a laser processing machine.

[Conventional technology]

FIG. 3 is a schematic diagram showing an example of a workpiece holding device in a conventional laser processing machine, and this example shows a case where laser welding is performed by the laser processing machine. In the figure, (1
) is the laser processing head of the laser processing machine, (2) is the focusing lens, and (3) is the laser beam.
) is configured to be linearly movable in the horizontal direction (Y axis) and vertical direction (two axes).

(4) is a cylindrical workpiece in which the inner material (6) is press-fitted into the outer material (5), (7) is a holding stand that holds the workpiece (4), and (8) is a motor and holding stand. (7), therefore, a rotating table for rotating the workpiece (4) in the direction of the arrow; the rotating table (8) and the holding table (7) constitute a workpiece holding device.

The operation of the conventional apparatus configured as described above is as follows: First, the workpiece (4) is held on the holding table (7), and the laser processing head (1) is moved in the horizontal direction (Y-axis )
and in the vertical direction (2 axes) to process the workpiece (4) (
approach the joint between the outer material (5) and the inner material (4), which is the welding part. In this state, the rotary table (7) is rotated in the direction of the arrow, and at the same time the laser beam (3) is emitted, converged by the converging lens (2) and focused at one point, and the workpiece (
When the laser beam irradiates the processed portion (4a) of the workpiece (4), the processed portion (4a) of the workpiece (4) is melted by the laser heat.

The workpiece (4) rotates approximately once, and at this point the laser beam (3
) and the holding table (7) is stopped, the processed portion (4a) of the workpiece (4) is melted and welded (18) over its entire circumference as shown in FIG.

FIG. 5 is a schematic diagram showing another example of a conventional work holding device. This device is a rotary table (8)'f9D shown in Figure 3.
In such a workpiece holding device, which rotates and has its bottom fixed to the side of a fixed table (9), one laser beam (3) is emitted from the processing head (1) in the direction of the arrow. Irradiation is applied to the peripheral wall surface of the rotating workpiece (4), and as shown in Figure 6, the material (5) on the outside of the workpiece (4) is penetrated and melted, and the material (6) on the inside is further penetrated to a certain depth. Dissolve and weld both materials (5) and (6).

[Problem that the invention attempts to solve] Laser light (3) irradiated from the laser processing head (1) of a laser processing machine
are generally fixed in the vertical direction (two axes) as described above. In consideration of this f, in the conventional work holding device,
Even if the cylindrical workpiece (4) has the same shape, if the machining direction is different, the attitude of the holding table (7) that holds the workpiece must be changed.

For this reason, it is necessary to process each workpiece (4) using a workpiece holding device with a fixed structure corresponding to the processing direction, which poses problems such as extremely troublesome setup and high equipment costs. .

The present invention has been made in order to solve the above-mentioned problems, and is a laser processing machine that can easily process workpieces of approximately the same shape using the same workpiece holding device even if the processing direction is different. The purpose of this invention is to obtain a workpiece holding device.

[Means for Solving the Problems] The present invention provides a fixing table having a shaft rotated by a drive source, a holding table for holding a workpiece, and a mechanism for rotating this holding table.
The rotating table is attached to the shaft of the fixed table and includes a rotary table.

[Operation] The shaft is rotated by the drive source of the fixed table, and the rotary table attached to this shaft is horizontally, vertically, or tilted to align the workpiece held on the holding table to the welding position.

[Embodiment] Fig. 1 is a schematic diagram of an embodiment of the present invention, in which the same or equivalent parts as in the conventional example shown in Figs. 3 and 4 are designated by the same reference numerals ((1) to
In the workpiece holding device (tl) of this embodiment, which is marked with (9)) and whose explanation is omitted, the rotary table (8) is replaced by the fixed table (9).
) (hereinafter referred to as the S-axis),
The output shaft of motor α0 is connected to this S axis, and the rotating table (
8) in the directions of arrows a and b to change the attitude of the holding table (7). The rotation axis (8) is a motor that rotates the holding table (7), and the axis of rotation of the holding table (7) will hereinafter be referred to as the T axis. In addition, for mackerel, the left end of the Y axis is the upper end of the 2nd axis, (to) is the right end of the Y axis and the upper end of the 2nd axis, 04 is the left end of the Y axis and the lower end of the 2nd axis, and (to) is the Y axis The right end indicates the lower end of the two axes and indicates the operating range of the laser processing head (1).

Next, Example 7 of the operation of the embodiment of the present invention configured as described above
explain. First, attach the welded workpiece (4) to the holding table (7) from the inner wall surface as shown in FIG.
) in the direction shown by the solid line, set the tilt angle to an arbitrary angle, and stop. Note that the figure shows a case where the T-axis is horizontal and the machining part of the workpiece (4) is located vertically.
The inclination of the T-axis can be set to any angle.

When the tilt angle of the rotary table (8) has been set, move the laser processing head (1) in the Y-axis direction and the Z-axis direction,
It is located near the processing section (4a) of the workpiece (4). Next, drive the T-axis to move the workpiece (4) attached to the holding table (7).
) at the same time, the laser beam (3) and the workpiece (4) are rotated.
) is irradiated to the processed portion (4a) to melt the processed portion (4a) and start welding. When the workpiece (4) has rotated approximately once, the irradiation of the laser beam (3) is stopped, and the rotation of the T-axis is also stopped, and the laser processing head 1) is moved to remove the entire workpiece (4) from the holding table (7). remove.

On the other hand, the outer material (
5b) and the inner material II (6b), after mounting the workpiece (4b) on the holding table (7), rotate the S axis in the direction of the arrow (b) as shown by the chain line in Figure 1. The laser processing head (1) is moved to the position indicated by the chain line to irradiate the processing part (4a) with the laser beam (3), and the T-axis is rotated at the same time. Just let it happen.

FIG. 2 is a schematic diagram of another embodiment of the invention.

In the embodiment shown in FIG. 1, a laser processing machine equipped with one workpiece holding device (c) consisting of a fixed table (9), a rotary table (8), and a holding table (7) has been described. Here, we have two such work holding devices f2°C.
In other words, the output shaft of the motor (Q
A turntable αη connected to a shaft) is provided, and two workpiece holding devices al), (21a) as shown in FIG.

Holding stand (7a) and (7b) when (8b) is horizontal
are arranged facing each other so that both are located on the outside.

In a laser processing machine equipped with the workpiece holding devices 01) and (21a) as described above, when processing a large number of workpieces in the same processing direction, one workpiece holding device (for example, Qη
), a new workpiece (4') is set on the other workpiece holding device (21a), and when the laser processing is finished, the turntable (
17) is rotated 180° and machined, a new workpiece (4')' is created & while machining, the other workpiece holding device takes out the machined workpiece (4) and sets a new workpiece. As a result, processing efficiency can be greatly improved.

A robot may be used to attach and take out the above-mentioned workpieces, which not only improves work efficiency but also increases the types of workpieces that can be laser-processed, making it possible to form a flexible system.

In the above description, the case in which workpieces are welded using the workpiece holding device according to the present invention has been mainly described, but it goes without saying that the present invention can also be practiced in cases where other laser processing is performed.

[Effects of the Invention]- As is clear from the above description, the present invention has a workpiece holding device for laser processing that is composed of a holding table equipped with a rotating shaft and a rotating table attached to this rotating shaft. When laser processing a workpiece having a circular or circumferential processing portion, the irradiation angle of the workpiece and the laser beam can be arbitrarily set. Therefore, different types of workpieces with different welding directions can be easily laser-processed using the same workpiece holding device.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an embodiment of the present invention, Fig. 2 is a schematic diagram of another embodiment of the present invention, and Figs. 3 and 5 are schematic diagrams for explaining a conventional work holding device and its operation. Figure, 4th
Figures 6 and 6 show examples of workpieces, respectively (a
+ is a cross-sectional view, (bl is a plan view. In the figure, (1) is a processing head, (4) is a workpiece, (
4a) is the processing part, (7), (7a), (7b
) are the workpiece holding stands, (8), (8a), (8b
・) is a turntable, (9), (9a). (9b) is a fixed stand, αO0α°C is a motor, CLQ is a base, (b) is a turntable, and 01) and (21a) are work holding devices. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent: Patent Attorney Tadashi Sato Figure 2 Y Car Yu] V, Turntickle (b) Cause 6 (Q) (b)

Claims (2)

[Claims] (1) It has a fixed base with a shaft that rotates by a drive source, a holding base that holds a workpiece, and a drive source that rotates this holding base, and the rotation is attached to the shaft of the fixed base. A workpiece holding device for a laser processing machine consisting of a stand and a stand. (2) A workpiece holding device for a laser processing machine according to claim 1, wherein the two workpiece holding devices are mounted on a turntable.