JP2747014B2 - Laser processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to laser processing.

(Prior art) Conventionally, a laser beam machine has a laser beam nozzle. Generally, a laser beam is radiated from a laser beam nozzle to a workpiece (work), and at the same time, an assist gas is jetted at the same time. Laser processing had been performed. In general, one product is produced by one laser thermal cutting process.

(Problems to be Solved by the Invention) By the way, in the above-mentioned conventional laser processing apparatus, it usually takes a lot of time and cost to perform laser thermal cutting. Recently, the number of users who perform laser processing on signboards, decorative articles, shim boards, steel frames, and the like has increased, but one product has been made by one cutting process. Thus, there was a problem that the cost of processing could not be reduced and productivity did not improve.

[Structure of the Invention] (Means for Solving the Problems) As described above, in order to solve the conventional problems, in the present invention, laser processing is performed on a polymerized workpiece formed by polymerizing a plurality of plate materials. In the laser processing machine, a table for supporting the overlapped work is provided, and a work clamp for gripping an end of the overlapped work is provided on the table so as to be movable in the x-axis and y-axis directions. A processing head having a laser beam nozzle device at the tip end for irradiating a laser beam to the tip is provided so as to be movable in the vertical direction. The laser beam nozzle device has a nozzle body having a nozzle hole at the tip end, A cylindrical work holding member that is provided on the outer periphery of the main body so as to be movable in the vertical direction and holds the superposed work from above, and the work holding member can be urged downward. The work holding member is configured to protrude downward with respect to the tip of the nozzle body when the work holding member is not holding the overlapped work. In order to move the overlapped work in the x-axis and y-axis directions with respect to the work holding member while being held from above, a plurality of free bearings each having a rubber ball below the work holding member are provided. It is characterized by comprising.

(Operation) According to the above configuration, the work clamp is moved in the x-axis and y-axis directions while the overlapped work formed by stacking a plurality of plate members is gripped by the work clamp, thereby forming the overlapped work. The portion to be processed is positioned vertically below (directly below) the laser beam device. Next, by moving the processing head downward, the rubber balls of the plurality of free bearings by the work holding member contact the upper surface of the overlapped work, and further the processing head moves downward,
The work holding member rises relatively to the nozzle body while resisting the urging force of the urging member. With this, the superimposed work can be pressed from above by the work pressing member together with the urging force of the urging member. Then, by irradiating the laser beam from the nozzle hole under the state where the superposed work is pressed from above by the work holding member,
Piercing (pierced hole) for pierced workpieces
Can be formed.

After the piercing process is performed on the superposed workpiece, the superposed workpiece is moved in the x-axis and y-axis directions along the cut portion of the superposed workpiece while irradiating a laser beam from the nozzle hole, thereby covering the superposed workpiece. The cutting slit can be formed by performing laser cutting on the cutting portion. At this time, since the rubber balls of the plurality of free bearings in the work holding member are in contact with the upper surface of the overlapped work, the movement of the overlapped work is performed smoothly, and the upper surface of the overlapped work is less likely to be damaged. .

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

With reference to FIG. 3, the laser processing machine 1 guides a superposed work W formed by superposing a plurality of plate materials W ₁ and W ₂ on a fixed XY table 3 laid horizontally, and the superposed work W W is thermally cut by a laser beam LB.

The laser beam LB is generated by a laser beam generator 5 and guided to a processing head 11 via an intensity controller 7 and a reflecting mirror 9. Condenser lens 13 inside processing head 11
Is provided, the laser beam LB is condensed by the condensing lens 13, and the overlapped work W is thermally cut at the condensing position. Also,
The overlapped work W is gripped by the work clamp 15 and is horizontally moved on the XY table 3 so that the position to be cut is immediately below the processing head 11.

The clamp 15 is driven in the plane X and Y directions by an XY-axis servomotor while holding the overlapped workpiece W. The processing head 11 is driven vertically by a Z-axis servomotor. Further, the laser processing apparatus 1 is provided with an NC device 17, and an operation unit of the NC device 17 is provided with a so-called manual pulse generator 19.

At the tip of the processing head 11, a laser beam nozzle device 21 according to the present embodiment as shown in FIGS. 1 and 2 is attached. FIG. 1 shows a state at the time of laser processing, and FIG. 2 shows a pressed state.

The laser beam nozzle device 21 includes a cylindrical nozzle body 23.
And a work holding device provided around the outside of the nozzle body 23
It consists of 25.

The nozzle body 23 has a nozzle hole 27 formed at the tip (lower side in FIG. 1), and the laser beam LB is irradiated from the nozzle hole 27 toward the polymerization work W together with the assist gas.

The work holding device 25 has a cylindrical work holding member 29 mounted around the outer periphery of the nozzle body 23, and is movable in the axial direction of the nozzle body 23. The work holder body 29
A plurality of free bearings 31 provided with, for example, hard rubber balls 33 are buried on the same periphery on the lower surface thereof in a state of protruding spherical surfaces. It should be noted that the arrangement of a large number of free bearings 31 can more uniformly hold the overlapped work W.

Further, the upper surface of the work holding body 29 and the nozzle body
Between the spring receivers 35 provided on 23, a plurality of biasing
Are provided to constantly press the work holding body 29 downward. Also, as shown in FIG. 2, the step 39 of the work holding device 29 and the step of the nozzle body 23 prevent the work holding body 29 from falling down and separating from the nozzle body 23.
41 comes into contact with and stops when the work presser main body 29 is machined by a predetermined amount.

On the other hand, between the plate material W ₁ and W ₂ is the polymerization workpiece W, are then oil 43 is applied to the plate surface due spray injection interposed. By the way, in the present embodiment, an example in which two plate members are superposed is shown, but there is no limit on the number of thin plates.

In the above configuration, when performing laser processing on the polymerized work W polymerized by the oil 43, the work holding device 25 shown in FIG. Nozzle hole 27 at the tip of body 23
And the distance between the upper surface of the overlapped work W and the upper surface of the overlapped work W are set at a predetermined interval. (Refer to FIG. 1.) When the nozzle body 23 descends, the nozzle body 23 also descends the work holding body 29 of the work holding device 25 provided via the elastic machine 37, and comes into contact with the overlapped work W. Then, the urging mechanism 37 is compressed, and the upper surface of the overlapped work W is pressed via the free bearing 31 by the urging force of the urging mechanism 37.
Thus, the plate materials W ₁ , W ₂ can be pressed together with the close contact of the plate materials W ₁ , W ₂ with the oil 43, thereby preventing the plate materials W ₁ , W ₂ from peeling off and performing one laser processing. Thus, a plurality of products can be obtained, and the processing cost can be reduced while the productivity is improved by shortening the processing time.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.

The configuration of the invention of this embodiment is summarized as follows.

That is, in a laser processing machine 1 that performs laser processing on a superposed work W formed by superposing a plurality of plate materials W ₁ and W ₂ , a table 3 for supporting the collective work W is provided. A work clamp having a laser beam nozzle device 21 for irradiating a laser beam to the overlapped work W at a position above the table 3 is provided so as to be movable in the x-axis and y-axis directions. 11
The laser beam nozzle device 25 includes a nozzle body 23 having a nozzle hole 27 at a tip end.
A cylindrical work holding member 29 which is provided on the outer peripheral portion of the nozzle body 23 so as to be movable in the vertical direction and presses the overlapped work W from both directions, and a urging member capable of urging the work holding member 29 downward. A work holding member when the overlapped work W is not pressed by the work holding member 29;
29 is configured to protrude downward with respect to the tip of the nozzle body 23, and the overlapped work W is pressed against the work holding member 29 in a state where the overlapped work W is pressed from above by the work holding member 29. In order to be able to move in the x-axis and y-axis directions, a plurality of free bearings 31 each having a rubber ball 33 are provided below the work holding member 29.

 The operation of the present embodiment is summarized as follows.

That is, by moving the work clamp 15 in the x-axis and y-axis directions while holding the end of the overlapped work W formed by stacking a plurality of plate materials W ₁ and W ₂ with the work clamp 15. Then, the portion to be processed of the overlapped work W is positioned vertically below (directly below) the laser beam nozzle device 21. next,
By moving the processing head 11 downward, the rubber balls of the plurality of free bearings 31 on the work holding member 29 are moved.
33 comes into contact with the upper surface of the overlapped work W, and further, the processing head 11
Is moved downward, the work holding member 29 rises relatively to the nozzle body 23 against the urging force of the urging bullet 37. This allows the work holding member 29 to press the overlapped work W from above, together with the urging force of the urging bullet 37. Then, in a state where the overlapped work W is pressed from above by the work holding member 29, a laser beam is irradiated from the nozzle hole 27 to perform a piercing process on the pierced portion of the overlapped work W to perform piercing. (Small holes) can be formed.

After the piercing process is completed, the laser beam is irradiated from the nozzle hole 27, and the overlapped workpiece W is moved in the x-axis and y-axis directions along the cut portion of the overlapped workpiece W, thereby cutting the overlapped workpiece W. By performing laser cutting on the portion, a cutting slit can be formed in the overlapped work W. At this time, since the rubber balls 33 of the plurality of free bearings 31 in the holding member 29 are in contact with the upper surface of the overlapped work W, the movement of the overlapped work W is performed smoothly, and the upper surface of the overlapped work W is damaged. Is reduced as much as possible.

As described above, according to the invention of this embodiment, laser processing (piercing, thermal cutting) can be performed on a superposed work W formed by superposing a plurality of plate materials W ₁ and W ₂ . By performing laser processing on a plurality of plate materials W ₁ and W ₂ simultaneously, it is possible to improve productivity and reduce processing cost by shortening the processing time.

Further, when performing laser processing on the overlapped work W, the adhesion of the respective plate materials W ₁ and W _{2 in} the overlapped work W is maintained to prevent the displacement of the respective plate materials W ₁ and W ₂ in the overlapped work W. High-precision laser processing on multiple sheets
This can be performed simultaneously for W ₁ and W ₂ .

Furthermore, by providing a plurality of free bearings 31 each having a rubber ball 33 below the work holding member 29, the movement of the overlapped work W is smoothly performed and the overlapped work Since damage to the upper surface of W is reduced as much as possible, work efficiency of laser thermal cutting is improved, and the quality of the polymerized work W can be maintained.

[Effects of the Invention] As described above, according to the present invention, laser processing (piercing,
Laser cutting), laser processing can be performed on a plurality of plate materials at the same time, and processing time can be reduced and processing cost can be reduced.

When performing laser processing on the overlapped work, it is possible to maintain the adhesion of each plate material in the overlapped work and prevent displacement of each plate material in the overlapped work, so that high-precision laser processing is performed on a plurality of plate materials. Can be done simultaneously.

Further, by providing a plurality of free bearings each having a rubber ball below the work holding member, when performing laser thermal cutting, the overlapped work is smoothly moved and the upper surface of the overlapped work is not damaged. Since it is possible to reduce as much as possible, the working efficiency of laser thermal cutting is improved, and the quality of the polymerized work can be maintained.

[Brief description of the drawings]

1 and 2 show a main part of the present invention. FIG. 1 is an enlarged cross-sectional view of a part indicated by an arrow 1 in FIG. 3, and FIG.
FIG. 3 is an enlarged sectional view showing the released state of the work holding device at the same position as in the drawing, and FIG. 3 is a side view of a laser processing apparatus according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Laser processing apparatus 21 ... Laser beam nozzle apparatus 23 ... Nozzle body 25 ... Work holding device 29 ... Work holding member 37 ... Biasing machine, 43 ... Oil

Claims (1)

(57) [Claims] 1. A laser beam machine for performing laser processing on a superposed workpiece formed by superposing a plurality of plate materials, a table for supporting the superposed workpiece, and a work for gripping an end of the superposed workpiece on the table. X clamp
A processing head having a laser beam nozzle device provided at a tip end thereof for irradiating a laser beam to a superposed work is provided movably in the vertical direction in the axis, y-axis direction, and a laser beam nozzle device for irradiating a laser beam to the overlapped work is provided above the table. The beam nozzle device has a nozzle main body having a nozzle hole at a tip end, a cylindrical work holding member provided on an outer peripheral portion of the nozzle main body so as to be movable in a vertical direction, and pressing the polymerization work from above, A biasing member capable of biasing the work holding member downward, wherein the work holding member protrudes downward with respect to the tip end portion of the nozzle body when the superposed work is not pressed by the work holding member. In order to move the overlapped work in the x-axis and y-axis directions with respect to the work holding member while the overlapped work is pressed from above by the work holding member, Laser processing machine characterized by comprising a plurality of free bearings having rubber ball each to the lower side of the pressing member.