JPH0465759B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a laser optical device for refracting laser light emitted from a laser oscillator in a laser processing machine and propagating it to a processing head.

[Prior Art] Fig. 2 is a schematic diagram showing the overall configuration of a normal laser processing machine, in which 1 is a laser oscillator, 2 is a laser beam, 3 is an optical path duct, and 4 is a processing head that refracts the laser beam 2. 5 is a bend block for propagation, and 6 is a processing table on which the workpiece is placed.

FIG. 3 is a sectional view showing the structure of the conventional bend block 4 shown in FIG.
11 is an inlet of cooling water that is circulated into the cooling chamber 10, 12 is an outlet thereof, and 13 is a spring 19 whose tip is brought into contact with the back surface of the cooling chamber 10. Adjustment screws for positioning the cooling chamber 10 against elastic force; 14 and 15 pins and rings supporting the cooling chamber; 16 a reflecting mirror; 17 a mirror holder; 18 connecting the mirror holder 17 to the cooling chamber 10 Attach the reflector 16 to
This is a mounting screw for tightly attaching the cooling chamber 10 to the front end surface of the cooling chamber 10.

In the laser optical device of the conventional laser processing machine configured as described above, for example, when the reflectance of the mirror surface decreases due to dust adhering to the reflecting mirror 16 from within the optical path duct 3, etc., and when replacing this, Remove the plurality of screws 9 to release the housing 8 from the bend block body 7, then remove the mounting screws 18 to separate the reflector 16 that is in close contact with the tip surface of the cooling chamber 10 from the mirror holder 17, and install a new one. 2. Replace the reflector 16 with the reflector 16, and attach the housing 8 to the bend block body 7 by reversing the above procedure.

Here, for example, if the parallelism between the mirror surface of the reflecting mirror 16 and the mounting surface before and after replacement differs by θ shown in the figure, if the laser optical path before replacement is AOB, the laser optical path after replacement will be AOB with an angular difference of 2θ. Therefore, the deviation angle θ is adjusted to 0 by operating the adjustment screw 13 to correct the propagation path of the laser beam 2.

[Problems to be Solved by the Invention] In the laser optical device of the conventional laser processing machine as described above, the adjusting screw 13 is There was a problem in which the laser beam path had to be corrected while operating the laser.

The present invention was made to solve this problem, and an object of the present invention is to provide a laser optical device that does not require adjustment of the laser beam path after replacing with a new reflecting mirror.

[Means for Solving the Problems] The laser optical device of the laser processing machine according to the present invention includes a reflector mounting portion of the bend block body.
A mirror holder with a cylindrical part capable of accommodating a reflecting mirror is directly attached to the mirror holder so that its angle can be adjusted, and the mirror surface of the reflecting mirror is in contact with the inner wall of the cylindrical part facing inside the bend block body. In addition to forming a protruding stepped portion, a pressing mechanism is removably installed on the rear end side to press and fix the reflecting mirror fitted in the cylindrical portion to the stepped portion.

[Function] In this invention, the reflecting mirror is fixed with its mirror surface in contact with the inner step of the cylindrical portion of the mirror holder, which is directly attached to the bend block body and whose angle is adjusted. The reflector can be removed and attached simply by removing the pressing mechanism at the rear end of the cylindrical part without removing it from the bend block body, so the mirror side always remains in a fixed position even if the reflector is removed or replaced by cleaning. drooping

[Embodiment] FIG. 1 is a cross-sectional view showing a laser optical device of a laser processing machine according to an embodiment of the present invention.
12 and 16 indicate the same or corresponding parts as the same reference numerals in FIG. 3 showing the conventional example. 19 is a stepped portion that the mirror side of the reflecting mirror 16 comes into contact with; 20 is a housing fixed to the bend block main body 7 by a screw 26;
21 has a stepped portion 19 on the inner wall of the tip, and an outward flange is formed on the outer periphery of the rear end, and multiple sets of screws 22 and springs 23 are attached to this flange.
A cylindrical mirror holder 24 is positioned at a predetermined position relative to the housing 20 by a screw 25.
A cover 27 is fixed to the rear end of the mirror holder 21 by a screw, and 27 is a screw that screws through the cover 24 to press the cooling chamber 10. The cooling chamber 10, cover 24, and screw 27 form a pressing mechanism 30 are configured.

In the laser optical device of the laser processing machine configured as described above, for example, when the reflectance of the reflector 16 has decreased and this reflector 16 is replaced, first the screw 25 is
is removed from the mirror holder 21, the fixed state of the cover 24 is released, and the cover 24 and the cooling chamber 10 are removed, and then the reflecting mirror 16 is removed from the rear opening of the mirror holder 21. Next, to attach a new reflector 16, the procedure is reversed to the above, and the new reflector 16 is brought into contact with the stepped portion 19, and is pressed into a pressed state through the cooling chamber 10 with the screws 27. Fix it with.

In the above embodiment, the mirror holder 21 is attached to the bend block body 7 via the housing 20, but the present invention is not limited to this. For example, the mirror holder 21 may be attached to the bend block body 7 by integrating the housing 20 with the bend block body 7 The holder 21 may be attached directly to the bend block body 7,
Even in such a case, the same effects as in the above embodiment can be achieved.

[Effects of the Invention] As described above, the present invention forms a step portion for positioning the reflective mirror surface at the inner tip of the cylindrical portion of the mirror holder which is directly attached to the bend block body and whose angle is adjusted, and the cylindrical portion A push mechanism for fixing the reflector is removably installed at the rear end, and the reflector can be attached or detached by removing the push mechanism, so even if the reflector is attached, detached or replaced, the angle will not be adjusted in advance. This has the effect that the mirror surface of the mirror holder does not shift, the mirror surface can always be kept in a constant position, and work efficiency is improved.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a laser optical device of a laser processing machine according to an embodiment of the present invention, Fig. 2 is an overall configuration diagram showing a normal laser processing machine, and Fig. 3 is an optical arrangement of a conventional laser processing machine. It is a sectional view showing an example. In the figure, 2 is a laser beam, 7 is a bend block body, 16 is a reflecting mirror, 19 is a step, 21 is a mirror holder, and 30 is a pressing mechanism. In addition, in the figure,
The same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. In a laser optical device for a laser processing machine, in which a reflector for refracting the laser beam is attached to a bend block body disposed at a bending part of an optical path duct that guides the laser beam, the reflector is attached to a portion of the bend block body where the reflector is attached. A mirror holder having a cylindrical part capable of accommodating the reflecting mirror is directly attached to the mirror holder in an adjustable angle, and the reflecting mirror is attached to the inner wall of the tip of the cylindrical part facing into the bend block body. It is characterized by forming a protruding step part that can be brought into contact with the mirror surface, and removably installing a pressing mechanism on the rear end side for pressing and fixing the reflecting mirror fitted in the cylindrical part to the step part. Laser optical equipment for laser processing machines.