JPH0342192A - Laser beam machine - Google Patents

Abstract

PURPOSE:To enable high quality laser beam machining without developing any damage to a material to be machined caused by reflected beam transmitting the material to be machined or upper end face of a honeycomb, by forming fine rugged part on surface of a block of the honeycomb structure with sand blast method, etc. CONSTITUTION:When the laser beam 4 is reflected with a scanning mirror 1 and this reflected beam 4a transmits the material 10 to be machined and reaches a side face plate 8, the reflected beam 4a is irregularly reflected with the rugged part formed on the surface 8a of side face plate 8. Then, when the reflected beam 4c is diffused and reaches the adjacent side face plate 8, by irregularly reflecting beam 4C there, too, the reflected beam 4d is further diffused to irradiate the rear of material 10 to be machined. However, as the irradiating laser beam is irregularly reflected and diffused with the side face plates 8 two times to reach the rear of material 10 to be machined, energy of the irradiating laser beam per unit area is drastically attenuated and it is prevented that the material 10 to be machined is damaged. Further, the material 10 is protected from being caught at the time of laying or taking off the material to be machined.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a laser processing machine that performs cutting by irradiating a workpiece with a focused laser beam, and particularly relates to an improvement of its processing table. It is.

[Prior Art] Fig. 3 is an example of a laser processing machine that cuts cloth, etc. mainly by irradiating laser light. Then, the laser beam (4) is rotated by 1 and ■ to irradiate the workpiece (10) placed on the processing surface (2). A conveyor that feeds intermittently at (
5) is a control device that moves the laser beam irradiation point on the surface of the workpiece (10) along a predetermined trajectory by changing the angle of the scanning mirror (1), and drives the conveyor (3) at predetermined intervals. It is supposed to be done.

Figure 4 shows the workpiece (
(6) is a honeycomb block made of aluminum alloy, and as shown in the plan view of FIG. 5 and the side view of FIG. 6, the honeycomb (7) is placed on a side plate. It is surrounded and fixed by (8) and end plate (9),
Such honeycomb blocks (6) are connected to the surface of the conveyor (3).

In the laser beam processing machine configured as described above, as shown in Fig. 3, the scanning mirror (1), which is angularly displaced by a command from the control device (5), reflects the incident laser light (4). 11・I light (4a) is directed to the workpiece (10)
Va radiation, the scanning mirror (1) is angularly displaced according to a preset cutting pattern for the workpiece (10), and the cutting angle of the reflected η4 light (4b) changes to perform predetermined cutting. .

[Problems to be Solved by the Invention] In the conventional laser processing machine as described above, the surface of the side surface (8) of the honeycomb block (6) is smoothed by machining, etc. As shown, the reflected light (4a) from the scanning mirror (() is transmitted through the workpiece (10), and the reflected light (4c) that is opposed on the surface of the side plate (8) is further reflected from the adjacent side. It is reflected on the surface of the face plate (8), and the reflected light (4C) irradiates the back surface of the workpiece (10), damaging the workpiece (10).

In addition, if there are scratches or cracks left on the upper end surface of the honeycomb (7), which is provided on the same surface as the upper surface (6a) of the honeycomb block (6), the a position of the workpiece (10) There were also problems such as the workpiece (10) getting caught on the upper end surface and being damaged when removed after processing.

This invention was made in order to solve the above-mentioned problems, and by adding a simple surface treatment to a honeycomb block, the ring 11 light transmitted through the workpiece and damage to the workpiece due to the upper end surface of the honeycomb can be reduced. It is an object of the present invention to obtain a laser processing machine equipped with a honeycomb block that does not cause the occurrence of.

[Means for Solving the Problems] A laser processing machine according to the present invention refracts a laser beam, irradiates the refracted light, and uses a plurality of consecutively arranged honeycombs ( Fine irregularities are formed on the surface of the 14-inch block by sandblasting or the like.

[Function] In the present invention, if the side surface of a block having a honeycomb structure is irradiated with a laser beam that has passed through a workpiece during laser processing, the laser beam will be diffused due to diffuse reflection. In addition, scratches, cracks, etc. on the upper end surface of the honeycomb in contact with the workpiece are removed, and the honeycomb and the workpiece are no longer caught.

[Example] FIG. 1 is a schematic diagram showing the state of laser light after passing through a workpiece in a laser processing machine according to an example of the present invention. In the figure, (1) to (io) are the same or equivalent parts as the parts with the same symbols in Fig. 7 showing the conventional example, but the honeycomb block (6) has its upper surface and side surface temporary (8) sandblasted. The honeycomb (7) is treated to form fine irregularities on its surface by a method such as a method, so that the upper end surface of the honeycomb (7) is formed with fine irregularities, and the workpiece (
10) The scars and cracks caused by cutting, which could cause the wire to get caught, have been removed.

In the laser processing machine according to the present invention configured as described above, as shown in FIG. 1, the laser beam (4) is reflected by the scanning mirror (1), and the reflected light (4a) When the reflected light (4a) reaches the side plate (8), as shown in the enlarged view in Figure 2, the reflected light (4a) passes through the side plate (8).
When the reflected light (4C) is diffused and reaches the adjacent side plate (8), the reflected light (4C) is diffused by the irregularities formed on the surface (8a).
d) is -layer diffused to irradiate the back side of the workpiece (10), or the energy per small area of the laser beam at the tip of the ray is tll and 1 for this jj is A of the workpiece (io). Since the light is diffused twice by η·1 on the side surface (3) before reaching the surface, the light is significantly attenuated and there is no risk of damaging the workpiece (10).

In addition, since the upper end surface of the honeycomb (7), which is on the same plane as the upper surface (6a) of the honeycomb block (6), the 1' U of the cutting edge 1, the paris, etc. have been removed, so that the workpiece (10) The fear that the honeycomb (7) and the honeycomb (7) may get caught when placing or removing the honeycomb is also eliminated.

[Effects of the Invention] As described above, according to the present invention, the upper and side surfaces of the honeycomb block on which the workpiece is placed are coated with m! II? , ; Since the u convex portion is formed, the workpiece is not damaged by the reflected laser beam after passing through the workpiece during machining, and the workpiece is not placed or removed. High-quality laser processing can be performed without the occurrence of occasional jams.

[Brief explanation of drawings]

FIG. 1 is a Kuwa-style diagram of a laser iJ (showing the adult 1 state of the laser beam in the machine) according to an example of the present invention, and FIG. 2 is an enlarged view showing the reverse of the laser beam in FIG. 1, the J state. ,
Figure 3 is a schematic diagram showing an example of a normal laser processing machine, Figure 4
The figure is a perspective view showing details of the workpiece placement section in Figure 3, Figure 5 is a plan view of the honeycomb block, Figure 6 is a side view thereof, and Figure 7 is a laser beam in a conventional laser processing machine. FIG. In the figure, (1) is a scanning mirror, (4) is a laser beam, (4a), (4c), and (4d) are reflected beams, (6) is a honeycomb block (a block with a honeycomb structure), and (7) is a honeycomb block. 8) is a side plate, and (9) is an end plate. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] A mirror that refracts the laser beam and irradiates it onto the workpiece,
In a laser processing machine equipped with a plurality of honeycomb-structured blocks arranged in series on a conveyor and on which the workpieces are placed, fine irregularities are formed on the surface of the honeycomb-structured blocks by sandblasting or the like. Characteristic laser processing machine.