JP2001259879A - Jig for laser beam machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for a laser beam machine which easily fixes a work without a large scaled structure. SOLUTION: Electromagnets 33 are provided for attracting the work 19 on the upper face of a mounting part 36 for the jig 31 for a laser beam machine where the mounting part 36 is provided for mounting and supporting the works 19a and 19b. A groove 32 is provided on the upper face of the mounting part 36, and electromagnets 36 degassed at stand-by which are energized by an electric current are disposed in parallel along the both sides of the groove 32. Upwardly opened holes are provided on the upper face of the mounting part 36 and cylindrical electromagnets 33 are embedded in the holes in a way that the upper face of the mounting part 36 and the upper face of the magnets 33 are flush with each other. The works 19a and 19b mounted on the mounting part 36 are attracted and fixed onto the jig 31 for the laser beam machine by the energized electromagnets 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for a laser processing machine for positioning and fixing a work.

[0002]

2. Description of the Related Art Conventionally, when a metal material (steel plate or the like) as a work is welded by laser processing, the work is deformed due to thermal expansion or the like, and the butting position is shifted or a gap is formed. Therefore, it is necessary to fix the workpieces in a state where they abut each other. As a jig for fixing a work, a jig using a hydraulic cylinder or the like is known.

[0003]

However, since these conventional jigs press and fix the work from the upper surface, there is a problem that the jig becomes large-scale. That is, the conventional jig requires a driving mechanism such as a hydraulic cylinder and various mechanisms for controlling the operation of the driving mechanism.

Further, in order to securely fix the welded portion of the work, these jigs are necessarily configured to press the periphery of the welded portion of the work with a clamper or the like.
Therefore, there is a possibility that the laser head may interfere with the jig, and inconvenience or the like that the movable area of the laser head is limited may occur.

An object of the present invention is to provide a jig for a laser processing machine which can easily fix a work without requiring a large-scale structure.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention provides a jig for a laser processing machine having a mounting portion for mounting and supporting a work. In the above, the gist is that a groove is provided on the upper surface of the mounting portion, and a permanent demagnetizing electromagnet for attracting a work is provided on both sides of the groove.

[0007] By providing an electromagnet on the mounting portion for mounting and supporting the work, iron or the like mounted on the mounting portion is attracted to the mounting portion, and therefore, the work can be easily fixed. Can be. Further, since the jig for the laser processing machine is disposed on the bottom side of the work, the jig does not hinder the laser processing. Thereby, works having various shapes can be easily fixed.

In addition, by using a demagnetizing electromagnet at all times, the work can be attracted to the mounting portion and fixed by energizing, and the work can be released from the mounting portion by releasing the energization. Can be. Therefore, the work can be freely fixed and released on the mounting portion based on one operation of the energizing switch of the electromagnet. In addition, by using the demagnetizing electromagnet at all times, unnecessary power is not consumed when not in use.

Further, since a groove is provided on the upper surface of the mounting portion serving as a welding portion, when the work welding portion near the upper surface of the mounting portion is laser-processed, the welding portion of the work is arranged in the groove. Thereby, the focus of the laser beam is focused on the mounting portion, and the mounting portion can be prevented from being damaged. Also, when burrs or the like are present at the ends of the workpiece when the workpieces are butt-welded, the burrs or the like are arranged in the grooves, so that the workpiece can be prevented from floating from the mounting portion, and the workpiece can be prevented from rising. The end faces can be reliably butted against each other.

According to a second aspect of the present invention, in the first aspect, a hole that opens upward is provided in the mounting portion, an electromagnet is buried in the hole, and the upper surface of the electromagnet and the upper surface of the mounting portion are connected to each other. Are located on the same plane.

An electromagnet can be easily provided by providing a hole opening above the mounting portion and embedding the electromagnet in the hole. Further, by arranging the upper surface of the electromagnet and the upper surface of the mounting portion on the same plane, the attraction action of the electromagnet is efficiently exerted on the work.

[0012] The invention according to claim 3 is the invention according to claim 1 or 2.
In the above, the gist is that the electromagnet has a columnar shape and a plurality of electromagnets are arranged along the groove. By making the electromagnet a columnar shape, it becomes easy to manufacture the mounting portion as a work jig. In addition, by arranging a plurality of electromagnets along the groove, the attraction action of the electromagnets is surely exerted on the work, so that the work can be firmly fixed. Further, by arranging a plurality of electromagnets along the groove, the work can be securely fixed even when the groove is not a straight line but a curved line, for example.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the laser processing apparatus has an X
An X-axis moving body 12 is provided. The X-axis moving body 12 is moved in a X-axis direction (front-back direction) on a pair of X-axis rails 17 laid in parallel on the floor by a driving mechanism (not shown). It is erected and supported so that it can reciprocate. A work table 18 is provided between the X-axis rails 17 so that a jig 31 for a laser processing machine is detachably provided.

A laser oscillator 13 is provided on the X-axis moving body 12.
And a cooling chiller as a cooling device for the laser oscillator 13.
The unit 14 is mounted. A laser light guide tube 15 is provided between the laser oscillator 13 and a laser processing head 21 described later, and the laser light generated in the laser oscillator 13 is provided in the laser light guide tube 15. Laser processing head 21 via a mirror (not shown)
It is led to.

On the upper surface of the X-axis moving body 12, a Y-axis rail 16 is provided in a direction orthogonal to the X-axis rail 17, and a laser processing head 21 is provided with a driving mechanism (not shown) on the Y-axis rail 16. It is erected and supported so as to be able to reciprocate in the Y-axis direction (left-right direction) via a saddle 22 having the same. Further, the laser processing head 21 includes a driving unit (not shown), and is capable of reciprocating in the Z-axis direction (vertical direction). The laser processing head 21 has a concave mirror (not shown) and focuses laser light.
The laser processing head 21 includes a rotation mechanism (not shown), and can rotate about an axis parallel to the X-axis direction.

As shown in FIGS. 2A to 2C, the jig 31 for the laser beam machine is made of a substantially rectangular steel plate, and a groove 32 extending in the Y-axis direction is provided at the center of the upper surface. On both sides of the groove 32, a plurality of electromagnets 33 each having a substantially cylindrical shape are arranged along the groove 32.

The electromagnet 33 is provided with a hole which is opened on the upper surface of the laser processing jig 31 and is buried in the hole, and the upper surface of the electromagnet 33 and the upper surface of the laser processing jig 31 are on the same plane. It is arranged to be located. The electromagnet 3
Reference numeral 3 denotes a constant demagnetization type electromagnet obtained by winding the coil 34 around the core 35, and is excited by energizing.

Next, the work 19 is supported by using a jig 31 for a laser processing machine.
The operation of performing laser processing on 9 will be described. As shown in FIG. 3, the works 19a and 19b are
9b are butted against each other, and the butted weld 37
Is mounted on the mounting portion 36 of the jig 31 for a laser beam machine so that the groove faces the groove 32. When the electromagnet 33 is energized, the work 19 is attracted to the mounting portion 36 and is fixed on the jig 31 for the laser processing machine. In addition, since the work 19 is placed on the placing portion 36 so that the welded portion 37 faces the groove 32, even if there is a burr or the like on the end surface of the work 19, the burr or the like is arranged facing the groove 32. The work 19 is not lifted up.

In this state, the laser beam is irradiated from the laser processing head 21 to the welding portion 37, and the laser processing head 21 is moved in the X-axis, Y-axis, and Z-axis directions with respect to the welding portion 37 to perform laser processing. Is performed. Here, the laser processing machine jig 31 is disposed on the bottom surface side of the work 19, and the upper surface side of the work 19 is released.
1 does not interfere with the jig 31 for the laser beam machine. Thereby, the laser processing head 21 can be freely moved.

The groove 32 is located at a position facing the weld 37.
Are arranged, even if the laser light emitted from the laser processing head 21 is defocused downward, the laser light does not focus on the jig 31 for the laser processing machine. Therefore, it is possible to prevent the jig 31 for the laser processing machine from being damaged by the laser beam.

After the work 19 is welded, the current flowing through the electromagnet 33 is cut off, and the suction of the work 19 on the mounting portion 36 is released. Thereby, the work 19 can be easily taken out from the jig 31 for the laser beam machine.

According to the above embodiment, the following effects can be obtained. The work 19 can be easily fixed simply by placing the work 19 on the jig 31 for the laser processing machine and supplying power to the electromagnet 33. Therefore, a large-sized jig as in the related art is not required, and the jig configuration is simplified even when the work 19 is large.

The jig 31 for the laser processing machine is the work 19
Since there is no jig on the upper surface of the work 19, the laser processing head 21 does not interfere with the jig 31 for the laser processing machine. Thereby, the laser processing head 2
As a result, the movable area of the work 19 is expanded, so that various types of laser processing can be performed on the work 19.

The use of the permanent demagnetizing electromagnet 33 allows the work 19 to be attracted to the mounting portion 36 by energizing when the laser processing machine is used, and by releasing the energizing when not in use. Work 1
9 can be released from the mounting portion 36. Therefore, the suction state of the work 19 on the mounting portion 36 can be freely operated based on one operation of the energizing switch (not shown) of the electromagnet 33. Also, a permanent demagnetizing electromagnet 3
By using 3, no wasteful power is consumed when not in use.

Even if burrs and the like are present on the end face of the work 19, the burrs and the like are arranged corresponding to the grooves 32, so that the work 19 can be prevented from floating with respect to the mounting portion 36. Thus, the end faces of the work 19 can be reliably butted against each other.

By providing the groove 32 on the upper surface of the mounting portion 36, it is possible to prevent the jig 31 for the laser processing machine from being damaged by the laser light even if the irradiated laser light is out of focus. Can be.

By providing a hole that opens above the mounting part 36 and embedding the electromagnet 33, the electromagnet 3
3 can be mounted. In addition, since the upper surface of the electromagnet 33 and the upper surface of the mounting portion 36 are arranged on the same plane, the attraction of the electromagnet 33 can be efficiently exerted on the work 19.

By arranging the plurality of electromagnets 33 along the grooves 32, the attraction of the electromagnets 33 can be reliably exerted on the work 19.
Can be firmly fixed. In addition, a plurality of electromagnets 3
By arranging the grooves 3 along the groove 32, the work 19 can be reliably fixed even when the shape of the groove 32 is not a straight line but a curved line, for example.

It should be noted that the present invention is not limited to the configuration of the above-described embodiment, and may be embodied by arbitrarily changing the configuration of each unit without departing from the spirit of the present invention.

Matching the shape of the groove 32 and the arrangement of the electromagnets 33 to the processing shape of the work 19. For example, when the processing shape is an S shape, the grooves 32 are provided in an S shape, and the electromagnets 33 are arranged along the shape of the grooves 32. Thus, by adjusting the shape of the groove 32 and the arrangement of the electromagnets 33 to the processing shape of the work, the vicinity of the welded portion 37 of the work 19 can be efficiently fixed.

Changing the number and shape of the electromagnets 33; For example, a core having the same length as the Y-axis direction of the jig 31 for the laser processing machine instead of arranging the electromagnets 33 in two rows on each side of the groove 32 or embedding a plurality of cylindrical electromagnets 33 And an electromagnet 33 provided by winding a coil on the inner surface on both sides of the groove 32. This is because there is no restriction on the number and shape of the electromagnet 33 as long as the electromagnet 33 can fix the work 19.

The mounting portion 36 is provided with a step. For example, as shown in FIG.
The steps a and 31b are respectively moved up and down using the lift 38 to provide a step. With this configuration,
The works 19a and 19b can be arranged at various positions, and the works 19 can be welded in a superposed state. Further, by changing the attitude of the laser processing head 21, it is possible to irradiate the overlapping portion of the work 19 with laser light.

[Brief description of the drawings]

FIG. 1 is a perspective view of a laser processing apparatus.

FIG. 2A is a perspective view of a jig for a laser processing machine, and FIG.
aa sectional drawing, (c) sectional drawing of an electromagnet.

FIG. 3 is a sectional view taken along line bb in FIG.

FIG. 4 is a sectional view of a jig for a laser processing machine provided with a step.

[Explanation of symbols]

19, 19a, 19b ... Work, 31, 31a, 31b
... Jig for laser beam machine, 32 ... Groove, 33 ... Electromagnet, 36
... Placement section.

Claims (3)

[Claims] 1. A jig for a laser beam machine provided with a mounting portion for mounting and supporting a work, wherein a groove is formed on an upper surface of the mounting portion, and the work is sucked on both sides of the groove. A jig for a laser processing machine, characterized in that a permanent demagnetizing electromagnet is provided. 2. The mounting part according to claim 1, wherein the mounting part has a hole that opens upward, the electromagnet is buried in the hole, and the upper surface of the electromagnet and the upper surface of the mounting part are located on the same plane. A jig for a laser processing machine, comprising: 3. The jig for a laser processing machine according to claim 1, wherein the electromagnet has a columnar shape and a plurality of electromagnets are arranged along the groove.