JPH03204187A - Laser beam machine - Google Patents

Abstract

PURPOSE:To extend the machining range by providing a work table freely movably on a base and providing a machining head freely movably in the longitudinal direction, in the direction orthogonal to the longitudinal direction and in the vertical direction of the base above this table to irradiate a work with a laser beam. CONSTITUTION:The work table 9 is provided freely movably in the longitudinal direction of the base on the base and the work W is supported via work supporting members 11 by this. The machining head 33 is provided above the work table 9. This is made freely movable in the longitudinal direction, in the direction to cross orthogonally to the longitudinal direction and in the vertical direction of the base. The work W is irradiated with the laser beam LB from the machining head 33. By this method, a product without a work flaw can be obtained at high speed.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a new laser processing machine.

(Prior Art) Conventional drive systems for laser processing machines include a workpiece movement type in which a vertically movable processing head is fixed on the Y-axis and the plane of the Y-axis, and the workpiece is moved in the Y-axis and Y-axis directions;
A work table moving type that moves a work table in the Y-axis and Y-axis directions is known. In addition, the work table supporting the work can be fixed and can be moved up and down.
A 3-axis optical axis moving type that moves the machine in the Y-axis and Y-axis directions, a 1-axis workpiece and a 2-axis optical axis that moves the work table in the X-axis direction and a vertically movable processing head in the Y-axis direction. It is known as a mobile type.

(Problem to be solved by the invention) By the way, among the conventional technologies mentioned above, the 3-axis optical axis movement type laser processing machine has a work table that is the same size as the maximum workpiece, so it is space-saving and high-speed processing is possible. It has the advantages of high performance and no damage to the workpiece. However, since the distance from the laser oscillator to the processing head varies depending on the cutting position on the worktable,
Since the laser beams iγ and beam modes are different, it is difficult to obtain uniform cutting quality.

In other words, the distance from the laser oscillator to the processing head is
For example, there is a difference of about 5 meters between the closest and farthest moths. For this reason, the spot diameter after focusing the laser beam using a condensing lens is expressed as a function of the laser beam diameter entering the condensing lens, so different laser beam diameters mean different cutting conditions. It is. Furthermore, since the beam mode also changes depending on the distance, there is a problem in that the sharpness changes or does not cut depending on the location.

The above-mentioned 1-axis workpiece, 2-axis optical axis movement type laser processing machine is a space-saving laser processing machine next to the 3-axis optical axis movement type laser processing machine, but because the weight of the moving work table is heavy. The problem is that high speed is lost.

Further, laser processing machines of the workpiece movement type and the worktable movement type require the most space and have the problem of damaging the workpiece.

The purpose of this invention is to improve the above-mentioned problems by taking advantage of the high speed and no scratching of the workpiece of the 3-axis optical axis movement type.
It is an object of the present invention to provide a laser processing machine in which the optical axis movement range is made as small as possible, the processing range is expanded, and space is saved.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a work table that supports a work on a base and is movable at least in the longitudinal direction of the base; Provided above the work table in a processing area within the length range of the workpiece supported by the work table in the longitudinal direction of the base, and in the longitudinal direction of the base, in a direction perpendicular to this longitudinal direction, and in an up-down direction. A head that is movable and that irradiates a laser beam toward the workpiece 1.
A laser processing machine was constructed with the following.

(Function) By employing the laser processing machine of the present invention, a workpiece to be machined is supported on a worktable provided on the base so as to be movable at least in the longitudinal direction of the base. By moving the machining head, which is positioned vertically at a distance from the workpiece in the machining area within the longitudinal length of the base, to the workpiece supported on the worktable, in the X-axis and Y-axis directions, a desired result is obtained. Laser processing is performed.

Next, the work table is moved in the longitudinal direction of the base, and the processing head is moved in the X-axis and Y-axis directions to perform laser processing on the unprocessed portion of the workpiece.

In this way, by minimizing the movement range of the optical axis, which is the processing head, and moving the processing head in three axial directions to perform laser processing, a product with high speed and no scratches on the workpiece can be obtained. Also, since the work table can be moved in the longitudinal direction of the base,
Processing - It is possible to laser process workpieces that are longer than the length that the throat is moved in the longitudinal direction of the base, and it is possible to process objects larger than the conventional maximum processing size, expanding the processing range.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Referring to FIG. 1, the laser processing machine 1 is composed of a rectangular base 3, and gate-shaped frames 5A, 5B that are erected over the base 3. On the base 3 are guide rails 7A and 7B that are parallel to each other in the X-axis direction (left-right direction in FIG. 1), which is the longitudinal direction of the base 3.
has been extended and laid.

For example, a box-shaped work table 9 with an open top is connected to the guide rails 7A and 7B via a guide member (not shown).
is provided. A plurality of needle-shaped or thrust-shaped work supporting members 11 with sharp tips are implanted at appropriate intervals on the work table 9.

The size of the work table 9 is such that a work W having a maximum processing size of, for example, LX2L to be processed can be supported on the work support member 11. A nut member 13 is provided at the lower part of the work table 9 at approximately the center thereof, and a ball screw 15 extending in the X-axis direction is screwed into the nut member 13.

One end of the ball screw 15 is rotatably supported by a bearing 17 attached to the right end of the base 3. A motor base 19 is attached to the left end of the base 3, and a drive motor 21 such as a servo motor is provided on the motor base 19. The other end of the ball screw 15 is operatively connected to the drive motor 21 .

With the above configuration, when the drive motor 21 is driven, the ball screw 15 rotates, and the work table 9 is guided by the guide rails 7A and 7B in the X-axis direction via the nut member 13, and is moved, for example, by the maximum distance. That will happen.

The gate-shaped frame 5A supports the workpiece support member 11.
The workpiece W supported by the second frame 5 is erected on the right end side with the workpiece W supported on the left end, and the gate-shaped frame 5
B is erected at about half the length 2L of the workpiece W supported on the workpiece support member 11 and located at the left end.

On the upper frames 23A and 23B of the concave frames 5A and 5B, a Y-axis gearbox 25 is provided so as to be movable in one axis direction (in the vertical direction in FIG. 1) by a drive motor (not shown).

On this Y-axis gear ledge 25, an X-axis gear ledge 27 is
It is provided so as to be movable in the axial direction by a drive motor (not shown). As shown in FIG. 2, this X-axis gearage 27 is equipped with a pendor mirror 29, and the Z-axis gearage 31 is driven in the Z-axis direction (in the vertical direction in FIG. 2) by a drive motor (not shown). It is movable.

A processing head 33 is provided at the bottom of the two-axis carriage 31, and the processing head 33 includes a condensing lens 35 that focuses the laser beam LB, a nozzle 37 that directs the laser beam LB toward the workpiece W, etc. It is equipped. This nozzle 37 is detachably attached to the lower end of the processing head 33.

With the above configuration, the Y-axis gear ridge 25 is moved in the Y-axis direction,
By moving the shaft gear ridge 27 in the X-axis direction and the two-shaft key ridge 31 in the Z-axis direction, the processing head 33 is moved in the X-, Y-, and Z-axis directions. Therefore, the processing head 33 moves freely in the X-Y plane, and the maximum processing area by the processing head 33 is within the range in which the size LxL of the workpiece W can be processed by laser.

A pend mirror 39 is located within the right end of the Y-axis gear ledge 25.
is provided. Further, a collimator 41 is provided near the upper side of the frame 5A in FIG. 1 at the same height as the pend mirror 39.

Furthermore, a pend mirror 43 is provided near the upper side of the collimator 43 (,' in FIG. 1).A laser oscillator 45 is arranged near the left side of this pend mirror 43 in FIG.

With the above configuration, the laser beam LB oscillated by the laser oscillator 45 is bent by the pend mirror 43, passes through the collimator 41, and is bent by the pend mirror 39. Further, the laser beam LB bent by the pend mirror 39 is tli bent by the pend mirror 29 and condensed by the condensing lens 35 in the processing head 33 . The laser beam LB focused by the condenser lens 35 is irradiated toward the workpiece W from a nostle 37 attached to the lower end of the processing head 33, and laser processing is performed on a desired position of the workpiece W.

As shown in FIG. 1, when the size of the work W to be machined is, for example, Lx2L, the work W is supported on the work support member 13 of the work table 11, and the drive motor 21 is driven. Then, the work table 11 is moved to the left by τ to the state shown in FIG. That is, the right half of the workpiece W is positioned between the frames 5A and 5B.

Next, the distance between the nozzle 37 of the processing head 33 and the workpiece W is kept constant by moving the Z-axis gear ridge 31 in the Z-axis direction, and then moved in the X-axis and Y-axis directions to position it at a desired position. do. In this state, the laser beam LB oscillated by the laser oscillator 45 is transmitted to the pend mirror 4.
3. Laser processing is performed on the workpiece W by condensing the light through the collimator 41 and pend mirror 39, 29 through the condensing lens 35, and then irradiating the condensed laser beam LB from the nozzle 37 toward the workpiece W. .

When laser processing is completed on the required portions of the workpiece W having a size LXL in this manner, the drive motor 21 is driven to move the worktable 9 to the right side in FIG. 1 via the ball screw 15 and the nut member 13. By doing so, the left half of the workpiece W is positioned between the frames 5A and 5B.

Next, by moving the laser processing head 33 in the X-axis and Y-axis directions and irradiating the laser beam LB, laser processing is performed on a desired location on the left half of the workpiece W.

In this way, the distances that the processing head 33 moves in the X-axis and Y-axis directions are respectively set as L, and the range of optical axis movement is made as small as possible, so that it is possible to obtain a product that is high-speed and has no scratches on the workpiece.

Further, after laser processing the right half of the workpiece W, while laser processing the left half of the workpiece W, the cut products and scraps can be taken out. Furthermore, if a workpiece W having a size of LXL is used, while laser processing is performed on the right half of the work table 9, the workpiece can be carried out after the laser processing is completed and the next workpiece W can be carried in on the left half.

Since the size of the workpiece W is LX2L and the movement range of the processing head 33 is LXL, the machining range of the workpiece W can be expanded by up to 1.5 times. The amount of movement of the work table 9 in the X-axis direction is only about half that of the conventional work movement type and work table movement type, so the weight of the work table 9 can be reduced by 4, and manufacturing costs can be reduced.

Note that the present invention is not limited to the embodiments described above, but can be implemented in other forms by making appropriate changes. In this embodiment, for example, the processing head 3
The movement range of 3 is LXL, and the size of workpiece W is LX2.
Although L and LXL have been explained, the length of the workpiece W in the X-axis direction may be in the range of L to 2L, or 2L.
It may be more than that. In addition, when laser processing a workpiece W having a length exceeding 2L, it is necessary to increase the length of the base 3 and the worktable 9 according to the length of the workpiece W.

Furthermore, although the example in which the work table 9 is moved only in the X-axis direction has been described, it is also possible to improve the mechanism so that it can be moved in the Y-axis direction.

[Invention (-) Effect] As understood from the explanation of the embodiments as above (・),
According to this invention, the workpiece to be processed is supported on the worktable provided on the base so as to be movable at least in the longitudinal direction of the base. By moving the machining head, which is positioned vertically at a distance from the workpiece in the machining area within the longitudinal length of the base, to the workpiece supported on the worktable, in the X-axis and Y-axis directions, a desired result is obtained. Laser processing is carried out 11 times.

Next, the work table can be moved in the longitudinal direction of the base, and the processing head can be moved in the X-axis and Y-axis directions to perform laser processing on the unprocessed portion of the workpiece.

In this way, by keeping the movement range of the optical axis, which is the processing head, as small as possible and moving the processing head in three axial directions to perform laser processing, it is possible to obtain a product that is high-speed and has no scratches on the workpiece. In addition, since the work table is moved in the longitudinal direction of the base, it is possible to laser process workpieces that are longer than the length of the processing head that is moved in the longitudinal direction of the base. The machining range can be expanded.

[Brief explanation of drawings]

FIG. 1 is a front view of a laser processing machine according to a positional embodiment of the present invention, and FIG. 2 is an enlarged view of the laser processing machine as viewed from the arrow .

Claims (1)

[Claims] a work table that supports a work on a base and is movable at least in the longitudinal direction of the base; A processing head is provided above the base, is movable in the longitudinal direction of the base, in a direction perpendicular to the longitudinal direction, and in an up-down direction, and emits a laser beam toward the workpiece. Laser processing machine.