JPS5922946Y2 - Laser processing equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a laser processing apparatus that can selectively switch an optical head according to processing conditions for a workpiece.

When performing welding, cutting, drilling, or surface treatment using laser processing, it is necessary to adjust the lens focal length, aperture, defocus, etc. according to the processing conditions, as well as adjust the lens, prism, reflector, etc. It is necessary to replace the optical system.

Therefore, it is necessary to adjust and replace the optical system, which requires a lot of effort.

In addition, in surface treatment of the workpiece, it is necessary to scan the laser beam at high speed or to make the laser beam pattern ring-shaped in order to expand the processing area, but the operations are similar to those described above. There are some drawbacks.

This idea was made in view of the above circumstances, and its purpose is to arrange optical heads on a plurality of rotary plates, and by rotating the rotary plates, selectively direct the optical heads into the laser beam path. The object of the present invention is to provide a laser processing apparatus that can be easily set according to processing conditions without adjusting or replacing the optical system.

Hereinafter, this invention will be explained based on one embodiment shown in the drawings.

Reference numeral 1 in FIG. 1 is the main body of the laser processing device, and on the upper part of this main body 1 there is a laser beam guide tube 4 equipped with a laser oscillator 2 and a reflecting mirror 3 that reflects the laser light emitted from the laser oscillator 2. It is installed in one piece.

A laser beam inlet 5 is provided in the upper wall of the main body 1 facing the reflecting mirror 3, and an outlet 6 is provided in the lower wall of the main body 1 facing the inlet 5.

An optical path 7 for laser light is formed between the inlet 5 and the outlet 6.

Furthermore, a support shaft 8 is provided within the main body 1, with both ends fixed to the -L wall and the lower wall and supported vertically.

On this support shaft 8, first, second and third rotary plates 10a, 10b are mounted at arbitrary intervals in the vertical direction by bearings 9...
10 C is rotatably supported.

These first, second, and third rotating plates 10a. 10b, IO
Gears 11 are carved on the outer peripheral surface of C, and these gears 11.
... are meshed with the drive gears 14 of the first, second, and third motors 13a, 13b, 13C via the idle gears 12.

Then, the first, second, and third rotating plates 10a, 10
b, Rotary drive mechanism 1 that independently and simultaneously rotates 10C
5.

Furthermore, the first, second, and third rotating plates 10a.

10b, F in the IOC, the part facing the optical path 7 of the laser beam has a through hole 16 through which the laser beam passes.
・is drilled t'.

The upper surface of the first rotary plate 10a corresponding to the through hole 16.16 has a first optical head 17 and a first
A guide tube 18 is attached.

A second optical head recess 9 and a second guide pipe 20, which will be described later, are provided on the upper surface of the second rotary plate 10b corresponding to the through hole 16.16.
is attached.

Further, a third optical head 21 and a fourth optical head 22, which will be described later, are attached to the lower surface of the third rotating plate 10C corresponding to the through holes 16.16, and these are attached to the third rotating plate 10C. The outlet 6 can protrude as the plate 10C rotates.

Further, 23 is a workpiece supported by a support stand 24.

Next, the first optical head 17 will be explained. It is configured as shown in FIG. 2.

25 is a cylindrical body, and inside this is a conical mirror 26 provided in the center and a ring-shaped inverted conical mirror 27 provided around the periphery.
is installed.

The laser beam with the luminous flux from the reflecting mirror 3 is converted into a ring shape by a conical mirror 26 and an inverted conical mirror 27.

Further, the second optical head 19 is configured as shown in FIG.

That is, 28 is a cylindrical body, and the upper and lower parts of this body are provided with first and second movable mirrors 29 that face each other point-symmetrically.
30 is attached so as to be able to vibrate freely using pivot parts 29a and 30a as fulcrums.

The first and second movable mirrors 29.30 are provided with a drive mechanism 31.32 such as a solenoid for vibrating them.

Then, the first and second movable mirrors 29 and 30 that vibrate the laser beam 7 are used for scanning.

Furthermore, the third optical head 21 is configured as shown in FIG.

That is, numeral 33 denotes a pair of cylindrical bodies slidably fitted in the axial direction, and the upper end of the cylindrical bodies 33 is rotatably supported by a bearing 34 with respect to the third rotary plate 10C.

Further, a gear 35 is fitted on the outer periphery of the upper end of this cylindrical body 33, and this gear 35 is connected to a drive gear 37 of a motor 36.
is engaged with.

At the lower part of the cylindrical body 33 formed in this way, a reflecting mirror 39 is rotatably provided for refracting the vertical laser beam from the through hole 38 in the lateral direction.

Therefore, this third optical head 21 can move up and down and rotate, and can process not only the outer circumferential wall of the workpiece 23 but also the inner circumferential wall of the cylindrical liquid-applied bead 23a.

Further, the fourth optical head 22 is configured as shown in FIG.

That is, 40 is a cylindrical body in which a conical prism 41 and a condensing lens 42 that is freely movable down are provided.

And 1. The laser beam is formed into a ring-shaped pattern by a conical prism 41, and this ring-shaped pattern is focused by a condensing lens 42.

In this case, it is also possible to remove the conical prism 41 and focus the light using only the condenser lens 42.

When surface-treating the outer circumferential wall of the workpiece 23, the first optical head 17 and the third optical head 21 are opposed to the optical path 7 of the laser beam, as shown in FIG.

In this state, when the laser oscillator 2 emits laser light, this laser light is refracted by the reflecting mirror 3 and introduced into the first optical head 17 via the introduction port 5.

Therefore, the laser beam in a luminous flux is converted into a ring-shaped pattern l' by the first optical head 17 and guided to the third optical head 21 via the second guide tube 2°.

The light is laterally refracted by the reflecting mirror 39 of the third optical head 21 and illuminates the outer peripheral wall of the workpiece 23 .

At this time, the cylindrical body 33 of the third optical head 21 is movable up and down, and the reflecting mirror 39 is rotatable, so the laser beam can be scanned and irradiated onto the workpiece 23, and the workpiece 23 can be illuminated over a wide area. Processing is possible.

Furthermore, as shown in FIG. 4, a cylindrical workpiece 23
When performing surface treatment on the inner circumferential wall in step a, by rotating the third optical head 21 with the motor 36, even if the workpiece e723a remains fixed, the entire surface can be uniformly treated.

In addition, when performing surface treatment on the workpiece 23 using the second optical head 19, the first and second motors 13a,
13b When the first and second rotating plates 1°a and 10b are rotated 180', the first guide tube 18 and the second optical head 19 face the optical path 7 of the laser beam.

Thus, the laser beam with the light beam from the reflecting mirror 3 passes through the first guide tube 18, is guided to the second optical head 19, and is refracted by the first and second movable mirrors 29, 30. After that, it is introduced into the third optical head 21.

At this time, since the first and second movable mirrors 29.30 are rotated in the direction of the arrow by the drive mechanism 31.32, the laser beam is scanned and is applied by the reflecting mirror 39 of the third optical head 21. The outer peripheral wall of the pressure object 23 is irradiated.

Therefore, the focused laser beam can be scanned on the peripheral wall of the workpiece 23, allowing surface treatment of a wide area.

Furthermore, when drilling or welding the workpiece 23 using the fourth optical head 22, the fourth optical head 22 is changed from the state shown in FIG.
When the first and third rotary plates 10a and IOC are rotated by 180 degrees by the third motors 13a and 13C, the tenth guide tube 18, the second guide tube 20, and the fourth optical head 22 are turned into laser beams. It faces the optical path 7 of the light.

Therefore, the laser light in the form of a luminous flux from the reflecting mirror 3 passes through the first and second guide tubes 18, 20, is converted into a ring-shaped pattern by the conical prism 41 of the fourth optical head 22, and is then condensed. The light is focused by the lens 42, and laser processing can be performed in a ring-shaped pattern with high energy on the outer periphery.

In the above embodiment, one optical head is disposed on each rotating plate, but a plurality of optical heads may be disposed, or a plurality of optical heads may be used in combination. good.

Furthermore, the number of rotary plates is not limited to three, and can be increased or decreased as necessary.

As explained above, this device has optical heads disposed on multiple rotating plates, and by rotating these rotating plates, the optical heads can be selectively opposed to the laser beam path. The device can perform multiple types of laser processing.

Furthermore, switching can be performed by a simple operation of rotating the rotary plate, and there is no need for the troublesome adjustment and replacement of lenses and reflectors as in the past.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, in which Fig. 1 is a longitudinal sectional front view of the entire device, Fig. 2 is a sectional view of the first optical head, and Fig. 3 is a sectional view of the second optical head. FIG. 4 is a sectional view of the third optical head, and FIG. 5 is a sectional view of the fourth optical head. 2... Laser oscillator, 7... Optical path, 10 a, 10
b, 10C... rotary plate, 15... drive mechanism, 1
7.19.21.22...Optical head.

Claims (1)

[Scope of utility model registration request] A support shaft is provided with a plurality of through holes that are coaxially rotatably supported in a direction orthogonal to the axis of the support shaft at multiple locations on the support shaft, and are each located at an equal distance from the axis of the support shaft. a plurality of rotating plates, a plurality of optical heads that are coaxially attached to the rotating plates in each of the through holes and each having a different optical system therein; 1. A laser processing apparatus comprising: a rotational drive mechanism for coaxially positioning the optical heads selected in the above; and a laser oscillator for inputting a laser beam into the coaxially positioned optical heads.