JPH09271976A - Bellows for optical path in laser beam machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the reciprocal motion of the bellows and to stop the laser beam machine when the motion exceeds a set value. SOLUTION: The bellows 1 for the optical path is structured such that plural bushings 9 are attached to plural guide bars 7 for the bellows at proper spaces apart, with the bushings 9 provided with partition plates 11 perpendicularly, with each of these partition plates 11 provided with the bellows 3 capable of moving reciprocally in the longitudinal direction of the guide bars 7, and that conductive members 13 are provided vertically and/or horizontally between the partition plates 11 of the bellows 3. In addition, the conductive members 13 are conductivity limiting tapes, forming a curved surface vertically on the inner side of the bushings 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bellows for an optical path in a laser processing machine.

[0002]

2. Description of the Related Art Conventionally, for example, in a light moving type laser processing machine as a laser processing machine, a laser processing head is moved in at least one axis direction, for example, a Y axis direction. The laser beam output from the laser oscillator reaches the laser processing head through a plurality of bend mirrors.

An optical path bellows 10 for protecting the laser beam when the laser processing head is moved in the Y-axis direction.
The bellows 103 as 1 is expanded and contracted in the Y-axis direction (the left-right direction in FIG. 3) as shown in FIG. One end of the bellows 103 is fixed to the frame 105, and a plurality of bellows guide bars 107 are provided extending in the Y-axis direction. Moreover, the right end of the bellows guide bar 107 is fixed to the frame 5. A plurality of guide bushings 109 are attached to each of the bellows guide bars 107 at appropriate intervals in the Y-axis direction, and the partition plate 11 is attached to each of the guide bushings 109.
1 is provided so as to hang down. Moreover, each partition plate 1
The bellows 103 of the above-mentioned optical path bellows 101 is attached to 11.

[0004]

By the way, the bellows 10 of the conventional optical path length bellows 101 shown in FIG. 3 described above is used.
3 reciprocates in the Y-axis direction when the laser processing head moves in the Y-axis direction, but due to friction and catching with the guide bushing 109, the bellows 103 becomes oblique as shown in FIG. There arises a problem that the laser beam LB hits the bellows 103 and burns.

An object of the present invention is to provide a bellows for an optical path in a laser processing machine, which restricts the movement when reciprocating and stops the laser processing machine when the movement exceeds the restriction.

[0006]

In order to achieve the above object, the optical path bellows in the laser beam machine of the present invention according to claim 1 is provided with a plurality of bellows guide bars fitted with a plurality of bushings at appropriate intervals. It is a bellows for a light path in a laser beam machine in which a partition plate is provided on a bushing, and each of the partition plates is provided with a bellows capable of reciprocating in the longitudinal direction of the bellows guide bar, and between the partition plates of the bellows. It is characterized in that conductive members are provided in the vertical and / or horizontal directions.

Therefore, when performing laser processing on a work, the laser processing head is moved and a laser beam is irradiated from the laser processing head toward the work to perform laser processing. The bellows through which the laser beam passes when the laser processing head is moved is guided by the bellows guide bar via the bushing and is moved together in the moving direction of the laser processing head.

The bellows are provided on each partition plate which is provided so as to hang down from the bushing, and a conductive member is provided between the partition plates in the vertical and / or horizontal direction to restrict the movement. Therefore, when the bellows reciprocates, the movement of the bellows is restricted by the conductive member, but when the bellows moves beyond the limit, the conductive member is cut off, an alarm is output, and the laser beam machine is stopped. Thus, the laser beam passing through the bellows is prevented from hitting the bellows and is not burned.

According to a second aspect of the present invention, there is provided an optical path bellows of the laser beam machine according to the first aspect of the present invention, wherein the conductive member is a conductive limiting tape. Is.

Therefore, by using the conductive limiting tape as the conductive member, when the bellows exceeds the limit, the conductive limiting tape is easily cut, an alarm is output, and the laser processing machine is stopped.

According to a third aspect of the present invention, there is provided an optical path bellows of the laser beam machine according to the first and second aspects of the present invention, wherein curved surfaces are formed on the upper and lower sides of the bushing. To do.

Therefore, since the curved surfaces are formed on the upper and lower sides of the bushing, when the bushing is guided and moved by the bellows guide bar, the friction of the bellows guide bar is reduced and the bushing is smoothly reciprocated.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, an optical path bellows 1 in a laser beam machine is provided with a bellows 3 which can extend and contract in the Y-axis direction (left and right direction in FIG. 1). One end, for example, the right end of the bellows 3 is fixed to the frame 5. Moreover, the right ends of the plurality of bellows guide bars 7 extending in the Y-axis direction are also fixed to the frame 5.

A plurality of bushings 9 are attached to each of the bellows guide bars 7 at appropriate intervals in the Y-axis direction.
A partition plate 11 hangs down from each bushing 9 and the bellows 3 is attached thereto. For example, a conductive limiting tape 13 as a conductive member is provided on the upper and lower sides and the right and left sides of the partition plates 11. Also, the bellows 3
1, a laser processing head (not shown) is provided on the left side. Moreover, the length of the bellows 3 between the partition plates 13 is regulated by the conductive limiting tape 13.

With the above configuration, when laser processing a workpiece, the laser processing head is moved in the Y-axis direction, and the laser beam LB output from a laser oscillator (not shown) passes through a plurality of bend mirrors. Bellows 3
After passing through the inside, the light is focused by a condenser lens provided in the laser processing head, and then is irradiated toward the work to perform the laser processing on the work.

When the laser processing head is moved in the Y-axis direction, the bellows 3 is also moved in the same direction. That is,
Since the bellows 3 are provided on each bushing 9 via the partition plate 11, they are guided by the bellows guide bar 7 and moved.

When the bellows 3 is moved, even if the bushing 9 is caught by the bellows guide bar 7 and the bellows 3 is slanted, the conductive limiting tape 13 is broken and the conduction is lost. If you do,
A signal can be output to the NC device of the laser processing machine to put the laser processing machine into an alarm state and stop it. Moreover, since the laser beam LB does not hit the bellows 3, a fire or the like can be prevented.

A curved surface 15 having a curvature R is formed inside each of the bushings 9 as shown in FIG. Bellows guide bar 7 between the curved surfaces 15
Is attached. Therefore, the friction of the bellows guide bar 7 can be reduced, and the reciprocating motion can be performed smoothly (smoothly), and it is possible to eliminate the possibility of being caught.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. In the example of the present embodiment, an example in which the conductive limiting tapes 13 are provided above and below and between the partition plates 11 has been described.
The conductive limiting tapes 13 may be provided between the upper and lower sides or the right and left sides of the gaps.

[0021]

As can be understood from the examples of the embodiment as described above, according to the invention of claim 1, when performing laser processing on a workpiece, the laser processing head is moved and the laser processing head is moved. A laser beam is emitted from the laser beam toward the workpiece to perform laser processing. The bellows through which the laser beam passes when the laser processing head is moved is guided by the bellows guide bar via the bushing and is moved together in the moving direction of the laser processing head.

The bellows are provided on each partition plate hung from the bushing, and a conductive member is provided between the partition plates in the vertical and / or horizontal direction to restrict the movement. Therefore, the movement of the bellows is restricted by the conductive member when the bellows reciprocates, but when the bellows moves beyond the limit, the conductive member is cut off, an alarm is output, and the laser processing machine is stopped. Thus, the laser beam passing through the bellows does not hit the bellows, so that a fire or the like can be prevented.

According to the second aspect of the present invention, since the conductive member is the conductive limiting tape, when the bellows exceeds the limit, the conductive limiting tape is easily broken and an alarm is output to ensure the laser processing machine. It can be stopped.

According to the invention of claim 3, since the curved surfaces are formed on the upper and lower inner sides of the bushing, the friction of the bellows guide bar is reduced when the bushing is guided and moved by the bellows guide bar, and the pushing is performed. It can be smoothly reciprocated.

[Brief description of drawings]

FIG. 1 is a front view of a bellows for an optical path in a laser processing machine of the present invention.

FIG. 2 is a side sectional view of a pusher.

FIG. 3 is a front view of an optical path bellows in a conventional laser processing machine.

4 is a state diagram in which the optical path bellows in FIG. 3 is pulled.

[Explanation of symbols]

 1 Bellows for optical path 3 Bellows 5 Frame 7 Bellows guide bar 9 Bushing 11 Partition plate 13 Conductive limiting tape (conductive member) 15 Curved surface

Claims (3)

[Claims] 1. A plurality of bellows guide bars are fitted with a plurality of bushings at appropriate intervals, and a partition plate is provided on each of the bushings so as to reciprocate in the longitudinal direction of the bellows guide bar. A bellows for an optical path in a laser processing machine provided with various bellows,
A bellows for an optical path in a laser beam machine, wherein a conductive member is provided between the partition plates of the bellows in a vertical direction and / or a lateral direction. 2. The bellows for an optical path in a laser beam machine according to claim 1, wherein the conductive member is a conductive limiting tape. 3. The bellows for an optical path in a laser beam machine according to claim 1, wherein curved surfaces are formed on the upper and lower sides of the bushing.