JPH05273454A - Mirror supporting device of laser beam machine - Google Patents

Abstract

PURPOSE:To reduce the inclination of a mirror where the mirror is invisible by fixing a mirror holder block without the intervention of the elastic holding force of a compression coil spring, etc. CONSTITUTION:The mirror supporting device of the laser beam machine is constituted by fixing a flange-shaped bush 2 to a bend block 1, engaging plural adjusting screws 5, composed of pipe-shaped special screws 5a and 5b in a flange shape, with the flange part of the bush 2, and engaging the mirror holder block 3 which stores a mirror holder 15 on the adjusting screws 5. Namely, the mirror holder block 3 which holds the mirror holder 15, adjusting screws 5, and bush 2 are united with a fixing screw 6, and the mirror holder 3 is held while the elastic holding force of the compression coil spring, etc., is removed. Then nuts 5b of the adjusting screws 5 are rotated respectively to vary the distance between the mirror holder block 3 and bush 2, and then the mirror holder block 3 slants to align the optical axes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mirror supporting device which is mounted on a laser beam machine and holds a bend mirror which bends a laser beam by reflection to change its traveling direction.

[0002]

2. Description of the Related Art FIG. 3 is a front view showing a conventional mirror supporting device of a laser beam machine, and FIG. 4 is a sectional view taken along line B in FIG. In each drawing, 20 is a bend block for holding a mirror support device, which will be described in detail below, and fixing it at a predetermined position of a laser beam machine, and 21 is a mirror holder for the main body 2.
It is a substantially ring-shaped member composed of 1a and a flange portion 21b. On the side of the inner periphery of the main body portion 21a close to the bend block 20, a step portion 21c is formed by a protrusion portion protruding toward the center.
Is formed, and the mirror 22 is housed therein. A ring 40, which will be described later, is formed at the opposite end of the stepped portion 21c so as to be fitted toward the bend block. As will be described later, the flange portion 21b is provided with a push screw 3 for fixing to the bend block 20.
4, an adjusting screw 32 for tilting the mirror 22 for adjusting the optical axis, a fulcrum bolt 33, and a compression coil spring 41 are provided. Reference numeral 23 denotes a mirror retainer, which is formed in a substantially cup shape, and a step portion 23b for retaining the mirror 22 is formed on the entire circumference at the tip of the side wall portion 23a. A handle 24, which will be described later, is provided on the bottom portion 23c. The mirror retainer 23 is fitted into the mirror holder 21 as shown in the drawing,
The mirror 22 is pressed toward the bend block by the action of a pressing plate 37 described later. Reference numeral 24 denotes a handle, which is a member that is fastened to the bottom portion 23c of the mirror retainer 23 together with the detent 25 and that generates a force for gripping the mirror 22 when the mirror is removed by operating the handle 24.
Reference numeral 26 is a pressing disc, which is screwed with a male screw provided on a shaft connected to the handle 24, and is a member whose locking is prevented by a compression coil spring 27 and which is positioned by a hexagon nut 28. By pushing the taper part of the cam 30 attached to the mirror presser 23 through the block 29 by the side surface of the presser disk 26, the cam 30 rotates about its rotation shaft 31, and one end of the cam 30 rotates. Hold the side. The side wall portion 23a is cut out at the portion where the cam 30 is arranged. In addition, the above 24, 25, 2
6, 27, 28, 29, 30, 31 constitute a mirror support device. Reference numeral 32 is an adjusting screw for moving the mirror holder 21 to adjust its inclination. This adjusting screw 32
Is a hemispherical steel bolt built into the screw head. A fulcrum bolt 33 serves as a fulcrum for the movement. Denoted at 34, 35 and 36 are a cap screw, a flat washer and a compression coil spring for flexibly fixing the mirror holder 21 to the bend block 20. Numeral 37 is a presser plate which is a mirror presser foot 2
The mirror 22 is sandwiched between the mirror holder 21 and the mounting screw 38, a compression coil spring (not shown),
A member that presses the vent block toward the vent block with a constant pressure using a sleeve and hexagon nut. Denoted at 39 is a hexagon socket set screw attached to the mirror holder by the rotation stop of the pressing plate 37.
The role of the hexagon socket set screw is to position the pressing plate 37 at the position shown in FIG. 3 by using a so-called pilot pin.

The operation of adjusting the optical axis of the supporting device for the bend mirror of the laser beam machine constructed as above and removing and attaching the mirror 22 will be described. First, the optical axis adjustment will be described. Prior to the adjustment of the optical axis, the mirror 22 is assumed to be attached to the bend block 20 as shown in FIG. In this state, the bend block 2 is rotated by turning the two adjusting screws 32 with the fulcrum bolt 33 as a fulcrum.
The distance from 0 changes, and the mirror holder 21 can be tilted to align the optical axis. The compression coil spring 36
As a result, the mirror holder 21 is flexibly fixed under the force always pushed toward the bend block. Then the mirror 22
The operation of removing the will be described. First, the handle 24 is tilted. By this operation, the shaft connected to the handle is pulled in, and the presser disk 26 attached to the shaft also moves,
When the side surface of the pressing disk 26 comes into contact with the tapered portion of the cam 30 and moves, the cam 30 rotates about the rotation shaft 31, and one end of the cam 30 holds the side surface of the mirror 22. Next, the pressing plate 37 is pulled and rotated with a finger to move it from the mirror pressing member 23. Then, the mirror retainer 23 becomes free while holding the mirror 22. Then handle 24
When you pull it up, the mirror 22 will move to the mirror holder 21.
Removed from.

[0004]

Since the conventional mirror supporting device of the laser beam machine is flexibly fixed to the bend block 20 by the compression coil spring 41 as described above, force is applied to the mirror holder 21 for some reason. In this case, the elastic holding force restores the original state, but an invisible tilt occurs in the mirror, the position of the focused laser light emitted from the processing head, which is the final end of the processing machine, and power down due to the tilt of the laser light occur. However, there was a problem that processing defects were likely to occur.

The present invention has been made in order to solve the above-mentioned problems, and a laser beam machine capable of minimizing the invisible tilt of the mirror even when a force is applied to the mirror holder for some reason. The purpose is to obtain a mirror support device.

[0006]

A mirror supporting device of a laser beam machine according to the present invention has a bush having a flange shape fixed to a bend block, and a pipe-shaped special screw and nut having a flange shape at the flange portion of the bush. A plurality of adjusting screws consisting of are engaged and a mirror holder block for accommodating the mirror holder is engaged on the adjusting screws.

[0007]

According to the present invention, the mirror holder block for holding the mirror holder, the adjusting screw and the bush are integrated by the fixing screw, and the mirror holder is held in a state where the elastic holding force of the compression coil spring or the like is eliminated. ..

[0008]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is a sectional view taken along line A in FIG. 1 in each figure
Is a bend block for holding a mirror support device, which will be described in detail below, and fixing it at a predetermined position of the laser beam machine. Reference numeral 2 is a bush-shaped ring-shaped member including a main body portion 2a and a flange portion 2b. Multiple screws 10 in 1
Fixed in. 3 is a mirror holder block, which is a main body 3a
A ring-shaped member including a flange portion 3b and a body portion 3a
A step portion 3c is formed by a protruding portion protruding toward the center on a side closer to the bend block 1 on the inner periphery of, and a mirror 4 having a flange portion 4a is housed therein. Reference numeral 5 is an adjusting screw which is provided between the flange portion 2b of the bush 2 and the flange portion 3b of the mirror holder block 3 together with the spacer 9 and changes the distance between the bush 2 and the mirror holder block 3. The adjusting screw 5 is a special screw 5a and a nut 5
When a combination is made, a hole is formed at the center of the special screw 5a and the nut b, so that a sock fixing screw 6 which will be described later can pass through. Further, the special screw 5a is fixed to the mirror holder block 3 by a pin 7 and is prevented from rotating. Further, the nut 5b is formed with a screw hole on its side surface, and can be fixed to the fixing screw 6 by inserting and tightening the set screw 8. A spacer 9 is provided between the bush 2 and the adjusting screw 5 to improve sliding (rotation) of the nut 5b of the adjusting screw 5. Reference numeral 6 is a fixing screw for making the above-mentioned 2, 3, 5, 9 into an integrated structure. Reference numeral 11 denotes a water chamber, which is formed in a substantially cup shape, and has a cooling water passage 13 in the cup-shaped inner bottom by fitting a chamber lid 12 having a flange portion. Further, the water chamber 11 and the chamber lid 12 are engaged with a mirror holder 15 having a flange portion by a plurality of pipe-shaped nipples 14 so that the nipples 14 are engaged.
It is possible to slide a certain distance around the axis. Further, since the nipple 14 has a pipe shape, water is passed through the cooling water passage 13 formed between the water chamber 11 and the chamber lid 12. Further, a plurality of compression coil springs 16 are arranged between the mirror holder 15 and the chamber lid 12 engaged therewith so that a force acts in a direction to increase the distance between the mirror holder 15 and the chamber lid 12. Reference numeral 17 is a set screw for changing the pressing force of the compression coil spring 16. 18 is a water chamber 11
A stepped portion 18a is formed in the lower part of the ring-shaped mirror receiver arranged side by side by a protruding portion projecting toward the center, and the flange portion 4a of the mirror 4 is held there. 11, 12, 14, 15, 16, 17 and 1 above
A mirror holding device is constituted by 8 and holds the mirror 4 and is housed in the mirror holder block 3. In this state, the fixing screw 20 fixes the flange portions of the mirror holder block 3 and the mirror holder 15. At this time, the water chamber 11 comes into contact with the end surface of the mirror 4 on the flange side, and the fixing screw 20 is further tightened, so that the water chamber 11 slides around the nipple 14. In this way, the mirror 4 is held with a constant pressing force.

The adjustment of the mirror optical axis of the mirror holding device of the laser processing machine and the mounting / removing of the mirror holding device will be described. Prior to the optical axis adjustment, it is assumed that the mirror 4 is mounted on the bend block as shown in FIG. In this state, the set screw 8 is loosened, and further the fixing screw 6 is loosened. Next, by turning the nuts 5b of the adjusting screws 5 respectively, the mirror holder block 3
And the bush 2 change, and the mirror holder block 3 tilts to align the optical axis. After aligning the optical axes, the fixing screw 19 and the set screw 6 are tightened in this order to be fixed. Next, the operation of attaching and detaching the mirror 4 will be described. For removal, the fixing screw 19 is loosened and the mirror holder 15 is pulled out, so that the integrated mirror holding device can be removed.
The mirror 4 can be removed by removing 8. The mounting procedure is the reverse of the removal procedure, and the integrated structure is then inserted into the mirror holder block 3 and the fixing screw 19 is tightened and fixed.

[0010]

As described above, according to the present invention, the method of fixing the mirror holder block 3 is fixed without the elastic holding force of the compression coil spring or the like, so that the force is applied to the mirror holder block 3 for some reason. Even when added, the invisible tilt of the mirror can be reduced as much as possible, and the position shift of the focused laser light emitted from the processing head, which is the final end of the laser processing machine, and the power down due to the laser light inclination are minimized. It has the effect of reducing processing defects.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a front view showing a mirror support device of a conventional laser processing machine.

FIG. 4 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 Bend block 2 Bush 3 Mirror holder block 4 Mirror 5 Adjustment screw 6 Fixing screw 15 Mirror holder

Claims (1)

[Claims] 1. A mirror support device arranged in an optical path system of a laser processing machine for irradiating a workpiece with a laser beam to perform processing, wherein the device fixes a bush having a flange shape to a bend block. Further, a plurality of adjusting screws including a pipe-shaped special screw having a flange shape and a nut are engaged with the flange portion of the bush, and the mirror holder block for housing the mirror holder is engaged on the adjusting screws. A mirror support device for a laser processing machine.