JPH02104488A - Rotary head for laser beam machine - Google Patents

Abstract

PURPOSE:To convert the beams to each other so that high-accuracy 2nd dimension working can be performed by arranging a laser beam made incident to a rotary head through four reflecting mirrors and an output beam condensed through a condensing lens on the same axis. CONSTITUTION:A 1st and a 4th reflecting mirror 16a, 16d are arranged detachably on the same axis between a bend mirror 3 and a condensing lens 8 and a 2nd and a 3rd reflecting mirror 16b, 16c are arranged between the 1st reflecting mirror 16a and the 4th reflecting mirror 16d. The laser beam 2 made incident to the 1st reflecting mirror 16a is reflected by the 2nd, the 3rd reflecting mirror 16b, 16c in the U shape to make incident to the 4th reflecting mirror 16d. The laser beam 2 reflected by the 4th reflecting mirror 16d is reflected on the same axis with the laser beam made incident to the 1st reflecting mirror 16a, that is, the rotary head and passed through the condensing lens 8 to perform the 3rd dimension working. Further, when the 1st and the 4th reflecting mirror 16a, 16d are removed, the incident beam to the rotary head passes directly through the condensing lens 8 provided in the rotary head to perform high-precision 2nd dimension working.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a rotating head of a laser processing machine that is capable of three-dimensional processing and two-dimensional processing.

[Conventional technology 1 FIG. 4 shows a conventional laser processing machine that performs three-dimensional processing.

In FIG. 4, 1 is a laser oscillator, 2 is a laser beam, 3 is a bend mirror that reflects the laser beam 2 emitted from the oscillator 1 and deflects it by 90 degrees, and 4 is a bend mirror that reflects the laser beam 2 in the vertical direction. A rotary head on which the laser beam 2 is incident; 5 is a table disposed below the rotary head 4 and reciprocated horizontally in mutually orthogonal X and Y directions and up and down, that is, in the Z direction; 6 is removably attached to the table 5; The attached workpiece, 7 is a control device, 11 is a vertical C axis, and 12 is a horizontal A axis.

This laser processing machine has two reflecting mirrors and a condensing lens (not shown) in a rotating head 4, deflects the laser beam oscillated from the oscillator 1 with a bend mirror 3, and reflects the laser beam in the rotating head 4. The laser beam 2 is further reflected by a mirror, passed through a condensing lens, and irradiated onto the workpiece 6 on the table 5 at an arbitrary angle by rotating around the vertical axis and around the horizontal axis. Together with movement in a desired direction, three-dimensional processing is performed into a desired shape.

Further, FIG. 5 shows a processing head for two-dimensional, ie, planar processing, in which numeral 8 is the processing head and 9 is a condenser lens fixed within the processing head 8. In this processing head, a vertical laser beam 2 oscillated from a laser oscillator and deflected by a bend mirror is directly incident on a condensing lens 9, passes through this lens 9, and is irradiated onto a workpiece 6. Perform processing.

By the way, a rotating head for three-dimensional processing as shown in Fig. 4 reflects the laser beam with a plurality of reflecting mirrors installed inside it and passes it through a condensing lens, so power absorption and circularly polarized light are avoided. Shift becomes a problem, and high-precision two-dimensional (
To perform flat surface machining, the rotary head is replaced with a machining head for flat surface machining as shown in FIG.

[Problems to be Solved by the Invention] The rotary head of a conventional laser processing machine is configured as described above. It is necessary to replace the head, and these replacements are troublesome, and there are also problems such as a long setup time when converting, and a decrease in the operating rate of the laser processing machine.

This invention was made to solve the above-mentioned problems, and allows high-precision two-dimensional (plane) machining to be easily performed in a short time without replacing the rotating head for three-dimensional machining. The purpose of this invention is to obtain a rotary head for a rede processing machine.

[Means for Solving the Problems] A rotary head of a laser processing machine according to the present invention includes a first rotary head that is coaxially attachable and detachable between a head mirror and a condensing lens. Fourth
A second reflecting mirror is disposed between the first reflecting mirror and the fourth reflecting mirror. A third reflecting mirror is provided, and the laser beam incident on the first reflecting mirror is reflected in a U-shape by the second and third reflecting mirrors and is incident on the fourth reflecting mirror. The fourth reflecting mirror is removed so that the light incident on the rotary head can directly enter the condenser lens.

[Function] The rotary head of the laser processing machine in this invention has the first to
By making the laser beam incident on the rotary head by the fourth four reflecting mirrors and the output beam condensed through the condensing lens coaxial, the first. By simply removing the fourth two reflecting mirrors, the incident beam to the rotating head can be changed from the three-dimensional processing state using the first to fourth reflecting mirrors to a high-speed laser beam that is directly passed through the condensing lens provided within the rotating head. It can be converted to perform two-dimensional (plane) processing with high precision.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In FIG. 19 and FIG. 2, the same reference numerals as in FIG. 4 indicate the same or corresponding parts, and 9 and 10 are the vertical C
Around axis 11, around horizontal A axis 12 ±350°, ±15
The first one rotates 0°. The second rotating body, 13.14, is the first rotating body.
This is a servo motor that rotates the second rotating bodies 9 and 10 via an appropriate power transmission mechanism, and these motors 13 and 14
is provided on the main body 15 of the rotary head 4, and is also shown in FIG.

It is configured to be controlled by a CNC control device not shown in FIG. 16a, 16b.

16c and 16d are the first beams that deflect the laser beam 2 by 90 degrees. Second. Third. This is the fourth reflecting mirror, and these reflecting mirrors are arranged in a U-shape as also shown in FIG. 1st. The fourth reflecting mirrors 16a and 16d are the first reflecting mirrors 16a and 16d. It is removably fixed to the second rotating bodies 9 and 10, and the center is located on the axis connecting the centers of the bend mirror 3 and the condensing lens 8 provided on the second rotating body 10, and between these are coaxially arranged. Also, the second. Third reflecting mirror 16b, 16C
are fixed to the first rotating body 9, and the second reflecting mirror 1
6b is a first reflecting mirror 16a, and a third reflecting mirror 16c is arranged to face a fourth reflecting mirror 16d at their centers. Note that the configuration of this embodiment other than that described above is the same as that shown in FIG. 4.

Next, the operation of the rotary head of the laser processing machine according to this embodiment will be explained.

In order to perform three-dimensional processing, the first to fourth reflecting mirrors 16a to 1
6d attached, the laser beam 2 oscillated from the laser oscillator 1 is vertically deflected by the head mirror 3, incident on the rotating head 4 from above, deflected horizontally by the first reflecting mirror 16a, and then horizontally deflected by the first reflecting mirror 16a. The laser beam 2 deflected to the second
The reflected light is incident on the reflection 'fL16b, vertically deflected by this reflector 16b and incident on the third reflector 16c, and horizontally deflected again by this reflector 16c and incident on the fourth reflector 16d. The laser beam 2 is reflected at right angles, passes through a condenser lens 8, and is irradiated onto the workpiece. As mentioned above, the first
- The laser beam 2 incident on the rotary head 4 is deflected in a U-shape by the fourth reflecting mirrors 16a to 16d, passes through the condensing lens 8, and is outputted. second rotating body 9,
No matter how the laser beam 10 is rotated around the C4!1II11 and A-axis 12, the workpiece can be irradiated with the laser beam, that is, it can be irradiated at any angle, allowing three-dimensional processing.

In addition, in order to perform normal high-precision two-dimensional machining, the second rotating body 10 shown in FIGS. Fourth reflecting mirror 16a.

By removing 16d, the second. Third reflector 16
Without using b and 16c, the laser beam 2 deflected by the bend mirror 3 passes directly from above through the vertically horizontal condensing lens 8, and the laser beam 2 condensed by this lens 8 is directed onto the workpiece. It can be irradiated and two-dimensional (plane) processing is possible.

[Effects of the Invention] As explained above, according to the present invention, the first mirror is coaxially detachable between the bend mirror and the condenser lens. A fourth reflecting mirror is disposed between the first reflecting mirror and the fourth reflecting mirror. A third reflecting mirror is provided, and the laser beam incident on the first reflecting mirror is transferred to the second reflecting mirror. By reflecting the laser beam in a U-shape by the third reflecting mirror and making it incident on the fourth reflecting mirror, the laser beam reflected by the fourth reflecting mirror is combined with the laser beam incident on the first reflecting mirror, that is, the rotating head. Three-dimensional processing is possible by coaxially reflecting the beam and passing it through a condensing lens, and by simply removing the first and fourth reflecting mirrors, the beam incident on the rotating head can be passed directly through the condensing lens installed inside the rotating head to achieve high precision. Two-dimensional (plane) machining can be performed, and conversion between three-dimensional machining and two-dimensional machining is the first step. This can be easily done in a short time by attaching and detaching the fourth reflecting mirror, which has the effect of improving the operating rate of the laser processing machine.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing a rotary head of a laser processing machine according to an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a configuration diagram of the reflecting mirror and condensing lens, and FIG. FIG. 5 is a perspective view showing a rotary head of a conventional laser beam machine, and FIG. 5 is a longitudinal sectional view showing a processing head for flat surface processing of a conventional laser beam machine. ■... Laser oscillation L 2... Laser beam, 3...
- Head mirror, 4... Rotating head, 6... Workpiece, 8... Condensing lens, 9, 10... First. Second rotating body, 11.12-C axis, A axis, 16a, 16b, 1
6c, 16d... 1st. Second. Third. Fourth reflector. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A laser beam oscillator, a bend mirror that deflects the laser beam emitted from the oscillator, and a vertical axis that passes the laser beam deflected by the bend mirror through a condensing lens and irradiates the workpiece at an arbitrary angle. A rotary head for a laser processing machine, comprising a rotary head that rotates around a horizontal axis and a rotary head that rotates around a horizontal axis, the first and fourth rotary heads being removably disposed coaxially between the bend mirror and the condensing lens. a reflecting mirror, and second and third laser beams arranged between the first and fourth reflecting mirrors to reflect the laser beam incident on the first reflecting mirror in a U-shape and incident on the fourth reflecting mirror. 1. A rotary head for a laser processing machine, comprising: a reflecting mirror; and by removing the first and fourth reflecting mirrors, a beam incident on the rotating head can be directly incident on a condensing lens.