JPH05329676A - Laser beam machine - Google Patents

Abstract

PURPOSE:To work a comparatively large workpiece with high accuracy by constructing a carriage, which is movable on Y-axis, on a carriage movable on X-axis and mounting on the top carriage a laser machining head, which is movable on X-axis. CONSTITUTION:A guide rail 3 in the direction of X-axis is installed on top of a supporting frame 1, and a carriage 7 is freely movable in the direction of X-axis by means of a servo motor 5. On this carriage 7, a guide rail 9 in the direction of Y-axis and a Y-axis carriage 11 are supported freely movably and driven by a servo motor 13 for positioning. Further, on this Y-axis carriage 11, the laser machining head 15, which is provided adjustably in the direction of Z-axis, is supported on an X-axis slider 17. In this case, the Y-axis carriage 11 and the X-axis slider 17, etc., are small and light in weight, and therefore, even if they are moved at high speed, a high accuracy in laser beam machining is maintained.

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,
More specifically, the present invention relates to a laser processing machine capable of processing a larger work with higher accuracy.

[0002]

2. Description of the Related Art Conventionally, in a laser processing machine for performing laser processing on a plate-shaped work, the work is moved in the X-axis and Y-axis directions with respect to a laser processing head fixedly provided at a predetermined position. There is a laser processing machine.

There is also a type of laser processing machine in which a work is moved in one of the X-axis and Y-axis directions and a laser processing head is moved in the other X-axis or Y-axis direction.

Further, there is a laser processing machine of a type in which a work is fixed on a work table and a laser processing head is moved and positioned in the X-axis and Y-axis directions to perform laser processing.

In the type in which the work is moved in the X and Y axis directions, the work moving area needs to be four times the work area. Therefore, when machining a relatively large work, the work should be fixed. A laser processing machine of a type in which a processing head moves in the X and Y axis directions is used.

[0006]

The relationship between the size of the work to be processed and the processing accuracy is as shown in FIG. 5 (A), and the processing accuracy decreases as the size of the work increases.
Further, if the processing speed is increased to improve the processing efficiency, the relationship between the processing speed and the accuracy is as shown in FIG. 5B, and if the processing speed is increased, the processing accuracy decreases. Further, when the work size becomes large, the size and weight of the portion that supports the laser processing head and moves in the X and Y axis directions become large, and the acceleration / deceleration is significantly impaired. That is, the relationship between the work size and the processing speed is as shown in FIG. 5C, and if the work size exceeds a certain size, the high speed is lost.

Therefore, conventionally, it has been considered difficult to perform high-speed and high-precision machining when the work size is large.

[0008]

In view of the above-mentioned conventional problems, the present invention provides an X-position movable above the work table supporting the work to be machined in the X-axis direction with respect to the work. An axis moving carriage is provided, and a Y axis carriage is provided on the X axis moving carriage so as to be movable in the Y axis direction. The laser processing head supported by the Y axis carriage is provided on at least one axis in the X axis or the Y axis direction. It is provided so as to be movable in the direction.

[0009]

With the above structure, after the X-axis moving carriage is moved and positioned to a predetermined position in the X-axis direction, the Y-axis carriage supported by the X-axis moving carriage is moved and positioned in the Y-axis direction and the Y-axis carriage is moved to the Y-axis carriage. By moving and positioning the supported laser processing head in the X-axis direction, it is possible to perform laser processing in a region of the movement range of the laser processing head in the X-axis direction and the movement range of the Y-axis carriage in the Y-axis direction.

Next, the adjacent regions can be laser-processed by moving and positioning the X-axis moving carriage in the X-axis direction within the moving range of the laser processing head in the X-axis direction.

That is, since a large workpiece can be machined by sequentially performing laser machining for each area within a predetermined range, it is possible to reduce the size and weight of a portion that moves in a relatively small area within the predetermined range. This enables high-speed, high-precision machining. By moving the laser processing head in the same direction when the X-axis moving carriage moves in the X-axis direction, the processing speed and the positioning speed in the same direction also increase.

Therefore, it is possible to process a relatively large workpiece as a whole at a higher speed and with higher accuracy than in the conventional case.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment, in which reference numeral 1 is a quadrangular annular support frame. The support frame 1 includes a work table (not shown) that supports a relatively large plate-like work (not shown) to be processed.
A guide rail 3 extending in the X-axis direction is laid on the upper surface of the support frame 1.

An X-axis moving carriage 7, which is moved and positioned in the X-axis direction by a first X-axis servomotor 5 by driving a first X-axis servomotor 5, is movably supported on the guide rail 3 in the X-axis direction. There is. A guide rail 9 extending in the Y-axis direction is laid on the X-axis moving carriage 7, and a Y-axis carriage 11 is movably supported in the Y-axis direction.

The Y-axis carriage 11 is moved and positioned in the Y-axis direction by driving a Y-axis servomotor 13 mounted on the X-axis moving carriage 7 via a transmission mechanism such as a ball screw mechanism. . The Y-axis carriage 11 is provided with a laser processing head 15 for laser-processing the work, which is adjustable in the Z-axis direction.
A shaft slider 17 is movably supported in the X-axis direction.

The X-axis slider 17 is movable in the X-axis direction in a relatively small restricted area. The X-axis slider 17 has a second X-axis servomotor 19 mounted on the Y-axis carriage 11. By driving
It is configured to be moved and positioned in the X-axis direction via a ball screw or the like.

That is, in this embodiment, the movement in the X-axis direction can be doubled.

The structure for guiding the laser beam from the appropriate laser oscillator to the laser processing head 15 and the structure for guiding the assist gas to the laser processing head 15 may be the same as the normal structure. Detailed description of the configuration is omitted.

In the above structure, when laser processing a large work supported on the work table, the first
After controlling the X-axis servo motor 5 to move and position the X-axis moving carriage 7 to a position corresponding to the desired position of the work, the Y-axis carriage 11 is moved in the Y-axis direction and the X-axis carriage 11 is moved.
By moving the shaft slider 17 in the X-axis direction and irradiating the laser beam from the laser processing head 15 to the work,
It is possible to perform laser processing on a desired position of the work.

In this case, the Y-axis carriage 11 is relatively small and lightweight, the X-axis slider 17 and the like are also small and lightweight, and both of them have a relatively small moving range. And X-axis slider 17
It is possible to maintain the high precision of laser processing even when the machine moves at high speed, and it is possible to perform high-speed and high-precision processing.

After the laser processing of the desired area is completed, the X-axis moving carriage 7 is moved to the X-axis slider 19 as described above.
Is moved and positioned in the X-axis direction within the range of movement in the X-axis direction, the Y-axis carriage 11 is moved in the Y-axis direction and the X-axis slider 17 is moved in the X-axis direction in the same manner as described above to perform laser processing. As a result, the laser processing of the area adjacent to the previously processed area can be performed at high speed and with high accuracy.

Therefore, by sequentially performing the laser processing on the adjacent regions, it is possible to perform the laser processing on the entire large work. In this case, the laser processing as a whole is performed at high speed and with high accuracy.

FIG. 2 shows a second embodiment. In the second embodiment, an X-axis guide rail 23 is provided on a base 21 arranged adjacent to the work table WT, and an X-axis moving carriage 25 is attached to the X-axis guide rail 23.
It is movably supported in the axial direction and is moved in the X-axis direction by driving the X-axis servomotor 27.

Then, one end of the Y-axis carriage 29 movably supported on the X-axis carriage 25 in the Y-axis direction is projected above the work table WT, and one end of the Y-axis carriage 29 is Laser processing head 3
The X-axis slider 33, which is vertically adjustable, is mounted on the X-axis slider 33 so as to be movable in the X-axis direction.

Also in the structure of the second embodiment, the same effect as that of the first embodiment can be obtained.

FIG. 3 shows a third embodiment. In the third embodiment, one end side of the X-axis moving carriage 35 is largely projected from the base 21, and the Y-axis moving carriage 37 is mounted on the X-axis moving carriage 35 so as to be movable in the Y-axis direction. ..

A Y-axis slider 39 movably supported in the Y-axis direction on the Y-axis moving carriage 37 is provided with an X-axis slider 43 having a laser processing head 41 vertically adjustable. It is attached to the.

That is, in the third embodiment, both the X-axis direction and the Y-axis direction have a double structure,
The same effect as the first embodiment is obtained.

As can be understood from the description of the embodiment as described above, the workpiece is not moved all over at a time in response to the overall size of a large workpiece, but at a high speed and with high precision in a desired region of the workpiece. Therefore, the relationship between FIGS. 5 (A), 5 (B) and 5 (C) described above is as shown in FIG.
It changes like (A), (B), and (C).

Therefore, as compared with the prior art, it is possible to perform high-speed and high-accuracy laser processing as a whole even for a workpiece having a large size.

The present invention is not limited to the above-mentioned embodiments, but can be carried out in other modes. That is, for example, by combining the configuration shown in FIG. 1 and the configuration shown in FIG. 3, it is possible to form a double-moving structure in both directions of the X axis and the Y axis in the configuration shown in FIG.

[0032]

As can be understood from the above description of the embodiments, according to the present invention, the movement of the laser processing head can be performed in a double structure, and high speed and high precision in a desired region can be achieved. By sequentially repeating the processing, it is possible to perform highly accurate processing over the entire work.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view schematically showing only a main part of a laser processing machine according to a first embodiment.

FIG. 2 is a perspective explanatory view schematically showing a second embodiment.

FIG. 3 is a perspective explanatory view schematically showing a third embodiment.

FIG. 4 is an explanatory diagram showing an effect in comparison with a conventional one.

FIG. 5 is an explanatory diagram showing a conventional effect.

[Explanation of symbols]

 7 X-axis moving carriage 11 Y-axis carriage 15 Laser processing head 17 X-axis slider

Claims (1)

[Claims] 1. An X-axis moving carriage that is movable in the X-axis direction with respect to the work is provided above a work table that supports the work to be processed, and the X-axis moving carriage is movable in the Y-axis direction. A laser beam machine equipped with a Y-axis carriage, and a laser beam machining head supported by the Y-axis carriage movably in at least one of the X-axis and Y-axis directions.