JPH06339783A - Method and device for inclined cutting laser machining of metal plate - Google Patents

Abstract

PURPOSE:To enable edge preparation and miter cutting so as to eliminate succeeding work by making a laser machine output the specific high output and executing cutting in a range of the specific inclined angle for a metal plate surface. CONSTITUTION:By the high output laser beam 1 having the output to emit >=1KW in the vertical direction of, a work 2 held slantwise is cut in a range of 85-25 deg. inclined angle theta. An inclined angle theta is arbitrarily set with turning a chuck 4 by a manual handle or inclined angle controller. Also, for the work placed in the horizontal direction the same inclined angle is set with turning a beam nozzle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to oblique cutting of a metal plate by a laser processing machine, which has been impossible in the past, for example, groove processing,
It is possible to perform cut-off processing and the like, thereby eliminating the need for post-processing by various other means after laser processing which has been conventionally required.

[0002]

2. Description of the Related Art A general use of a laser processing machine is to apply a laser beam perpendicularly to a work.
Even in the movable type of the laser nozzle, the movable type of the work, and the type in which both move intricately, the laser beam is always incident perpendicularly to the work. .. The reason is obviously that the main purpose of use is cutting, and there was a problem of efficiency at the time of cutting and a problem of maximum output of a laser beam that can be cut. If the same cutting is done, it is efficient for the laser beam to cut through the shortest path, and the maximum output so far is 1.2K.
It was common knowledge that the laser beam was applied perpendicularly to the work for these reasons. Therefore,
The cut end surface of the work after cutting was almost vertical as shown in FIG. 5, and the connection method using this was also limited.

[0003]

When the laser beam is applied perpendicularly to the work, the reflected laser beam returns to the original optical path in proportion to the increase in the output. There are few problems if the output is about 1 kW as in the past, but, for example, when cutting aluminum sheets, it was up to about 2 mm thick, but in order to cut thicker materials, a YAG laser processing machine can increase the output to several kilowatts. If an output is used, the reflected laser beam will be too strong and the condenser lens will be damaged. For the purpose of solving this problem, it was found that diagonal cutting can be performed in the process of inclining the laser beam with respect to the work by 3 to 10 ° and studying the condition of no reflection. That is, the present invention is intended to provide a new cutting method for laser processing, which has conventionally been performed by vertical cutting, and thereby provide a wide range of laser processing applications.

[0004]

According to the present invention, the output of the laser processing machine is set to a high output of 1 KW or more and an output of the existing capacity of 1 KW to 5 KW, and the inclination angle is 85 ° to 25 ° with respect to the metal plate surface. A laser processing method and apparatus for obliquely cutting a metal plate, which is characterized by cutting the metal plate.

The cutting process is a beveling process or a cutting process of a metal plate, which is a beveling process with an inclination angle of 45 °.

Further, the laser processing machine has a high output power of 1 KW or more, and manual or automatic control of an angle of at least 85 ° to 25 ° with respect to the metal plate surface of the work. We have developed an oblique laser cutting machine for metal plates that is equipped with a machine.

[0007]

[Operation] The output of the laser processing machine is set to a high output within the above range,
Since the metal plate is made to act on the metal plate in the range of the above-mentioned predetermined inclination angle, the metal plate can be cut obliquely.

If this cutting is performed at an inclination angle of about 45 °,
Bevel welding, which could not be done before, can be done without post-processing, and cutting work can be done and fastening of frames and frames without post-processing.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of the present invention in which a workpiece 2 held obliquely is cut by a laser beam 1 emitted in a vertical direction. In this case, a YAG laser processing machine is used, the output is set to a high output of 3 KW, and the inclination angle θ =
The metal plate is cut by irradiating laser light at 45 °. The inclination angle can be set to an arbitrary inclination angle by rotating the chuck 4 with a manual handle in the range of 85 ° to 25 °, or by rotating the chuck 4 in the same manner by a control device provided.

FIG. 2 shows a second embodiment in which the laser beam is applied obliquely to the work 2 placed in the horizontal direction. Also in this case, the output is set to 2 KW by using the YAG laser processing machine. The tilt angle can be set to an arbitrary tilt angle in the range of 85 ° to 25 ° by rotating the beam nozzle 5 by a manual handle or by similarly rotating the beam nozzle 5 by a control device provided. As described above, the present apparatus for oblique cutting can tilt the work and hold the work, or can tilt the laser nozzle.
Output capacity of 1-5KW is possible.

FIG. 3 shows an example in which the cutting process for obliquely cutting as described above is a groove process with an inclination angle of 45 °. The V-shaped groove welds 3 are made by abutting the pieces thus processed.

FIG. 4 (a) shows an example in which two metal sheets are butted against each other by diagonally cutting a metal plate for cutting by YAG laser processing. (b) has a very good finish just by finishing the corners. This is largely different from the case of joining vertically cut pieces in the conventional example of FIG.

[0013]

According to the present invention, it is possible to cut a metal obliquely by using laser processing. Therefore, based on this, it becomes possible to perform processing such as groove processing and fastening processing which were not possible only by conventional laser cutting processing, and it has become possible to diversify processing means. In addition, the effect of contributing to labor saving has been obtained, such as the need for the post-processing that has been conventionally required can be saved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention, in which a workpiece held obliquely is cut by a laser beam emitted in a vertical direction.

FIG. 2 is a cross-sectional view showing a second embodiment of the present invention, in which a workpiece placed in a horizontal direction is irradiated with a laser beam from obliquely above.

FIG. 3 is a cross-sectional view showing an example of groove processing.

FIG. 4 (a) is a side view of an example in which two metal plates cut by laser processing are butted, and FIG. 4 (b) is a side view when corners are finished.

FIG. 5 is a side view showing a state of joining vertically cut pieces of a conventional example.

[Explanation of symbols]

 1 Laser beam 2 Work 3 V-shaped groove welding 4 Chuck 5 Beam nozzle

Claims (3)

[Claims] 1. An oblique cutting laser processing of a metal plate, characterized in that the output of the laser processing machine is set to an output of 1 KW or more and the metal plate is cut within a range of an inclination angle of 85 ° to 25 ° with respect to the surface of the metal plate. Method. 2. A laser processing method for obliquely cutting a metal plate, wherein the cutting process according to claim 1 is a beveling process or a dicing process with an inclination angle of 45 °. 3. A laser processing machine, the output of which is 1 kW
An oblique cutting laser processing device for a metal plate, which has the above output and is provided with a manual or automatic control device having an angle of inclination of at least 85 ° to 25 ° with respect to the surface of the metal plate of the work.