JPS60137588A - Transmission device for laser beam - Google Patents

Abstract

PURPOSE:To enable laser working without moving a water to be worked by placing a reflection mirror in the coupling line of links, transmitting a laser beam on the central axis of the links and oscillating reflection mirrors according to the moving angles of the links. CONSTITUTION:Links 4 are vertically oscillatably pivoted to a rotary base 2 supported swivelably via a hollow swiveling shaft 3 to a base plate 1 and a device 5 for converging a laser beam L is oscillatably pivoted to the top end thereof. A pair of reflection mirrors 7, 8 are disposed at 45 deg. angle of inclination with respect to the axial center P on the axial 3 center P in the bases 1, 2 and reflection mirrors 12-14 are disposed respectively to the pivot part 9 at the oscillating root end of the links 4, the flexing pivot part 10 of said rings and the pivot part 11 at the oscillating root end of the device 5. The mirrors 12, 14 are respectively supported to the base 2 of the links 4 oscillatably along the links 4 and the device 5 at the angle of 1/2 the oscillating angles alpha, beta of the device 5 with respect to the links 4. The beam L is reflected in order of the mirrors 7, 8, 12- 14 and is made incident to the device 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for transmitting a laser beam emitted from a laser oscillation device in any direction.

Conventional pressurizing laser equipment uses a laser beam that travels in a straight line.The laser beam is reflected by a reflector to change its direction, and the beam is narrowly focused through a laser convergence device near the workpiece. A method of irradiating the area is adopted.

In this case, the reflecting mirrors and focusing devices along the way are all fixed, and once set, it is very difficult to move them.
Since this is difficult, do you have to move the workpiece to add it?
It was normal.

The laser beam transmission device proposed here places a reflector on the coupling axis of the link, transmits the laser beam along the center axis of the link, and then moves the reflector to follow that angle by half the angle that the link moves. can be moved to transmit the laser beam at the same angle as the movement angle of the link.

The present invention will be explained in detail below.

1 shows an example of the laser beam transmission device of the present invention by the company, in which a laser beam oscillated from a laser oscillation device (not shown) is transmitted from the left side of the base 1 to the reflecting mirror 7 in a state of 11 beam or close to it. , and from now on each reflector 8
- The laser beam enters the laser focusing device 5 while being reflected by the laser beams 12, 13, and 14, is focused there, and is irradiated onto the workpiece W from below.

Next, the specific structure of each part will be explained.

Figure 1 is a schematic diagram of the configuration.
It is supported so as to be fully rotatable via a rotary shaft 3, and a link 4 which is bent in one section is pivotally supported on the swivel base 2 so as to be able to move up and down. The tip side link 4 of this bent link 4
A member 6 of the laser beam focusing device 5 is attached to the distal end of the link 4b so as to be rotatable around the axis of the distal link 4b. The laser beam converging device 5 is pivotably supported on the picking member 6 so as to be swingable. Inside the base 1 and the rotary table 2, the axes 1:) and 8 of the spirals 1 and 2 are arranged, respectively.
is fixed at an angle of 45° with respect to the axis P so that the parallel laser beam L oscillated by a laser beam oscillator (not shown) can be reflected in alignment with the axis P. In addition, the reflecting mirror 8 placed inside the rotary table 2 is centered on the rotation axis)2)
Above, the laser beam L divided into large parts from the base-side reflector 7 is directed to the pivot point 9 on the rotary moss 2 of the link 4 by Lt' at 45 degrees. It is fixed to the rotating table 2 so as to form an angle. The pivot portion 9 of the link 4 to the rotary table 2', the base Mill link 4b and the tip side link 4b
Reflecting mirrors 12 and 1 are attached to the pivot part 1 (3 and 1) of the laser beam converging device 5 and the pivot part 11 of the laser beam converging device 5, respectively.
3.1.・It is 1 or placed.

Each wave mirror 12, 13, 14 is connected to each pivot point 9, 1(), 11
The swing angle is halved to ,,I-〆+
+--r-F1'+J,-y! , iwLo, +1. Aw
l(TJ-(+lI/110·11) The reflective surface is arranged on the axis X-Y-Z of 11'.

FIG. 2 shows a swing angle halving mechanism 15 in the pivot portion 10 between the proximal link 4a and the distal link 4b. (=] The stand 16, the mirror mount 16, and the tip side link 4a
The first relay link 17a, which connects the
It consists of a second relay link 17b that connects the base 16 and the tip side link 4b.
7b forms a parallel link. The mirror assembly 16 is pivotally supported on a swinging fulcrum part (pivot part) 10 of the bent link 4 so as to be swingable within a plane including the reflecting surface of the reflecting mirror 12.

A long hole 18 is formed in the mirror mount 16 on the vertical axis S of the reflecting mirror 13 and is aligned with the vertical axis S.

The pivot pins 19 of the first relay link 17a and the second relay link 17b can be moved within the elongated hole 18. For this reason, the pivot portion 10 between both swing links 4a and 44+ and both relay links 17a * 171.1 yo 4
- Since it will be located on the vertical axis S, the tip side link 41]
When the mirror 13 swings by an angle θ with respect to the proximal link 4a, the mirror 13 swings at an angle of 1 with respect to the proximal link '94a.・At a swing angle of 2θ, it swings together with the tip side link.

Pivotal support 9 and handle 1 between rotating table 2 and proximal swing link 4a
The same applies to the pivot part 11 of the first part (・J6 and the laser beam focusing device 5 and
In the pivot portion 9, a reflector 12 is provided in accordance with the swing angle α of the base end 111F swing link 4a, and a reflector 14 is provided in accordance with the swing angle β of the base end 111F swing link 4a, and the reflector 14 is provided with a swing angle β of 1.2. Follows the swing angle.

Further, the holding member 6 of the laser beam converging device 5 is attached to the distal end of the distal end side link 41) so as to be rotatable around the link axis ``I''. and the laser beam converging device 5 are connected by a single-section bent link 4, or may be connected by a multi-section bent link or by a plain link.Also; It is also conceivable to pivot directly to the distal end of the distal end side link 4b so as to be swingable.

Reference numeral 20 in the figure is a laser beam entrance opening formed on the side surface of the base 1.

As described above, in the present invention, the rotary table is rotatably supported with respect to the base, and the laser beam focusing device is rotatably supported at the tip of the link that is rotatably supported on the rotary table. Then, reflectors are placed on the pivot axes of the base and rotating table and on the pivot axes of each swing pivot, and each swing pivot follows that angle by half of the swing angle. Since the structure is such that the reflecting mirror is moved by the laser beam focusing device, no matter what position the laser beam focusing device is in with respect to the base, the laser beam can be reflected twice by each reflecting mirror, and the laser beam focusing device can be easily moved. can be reliably transmitted. As a result, in the present invention, the laser beam converging device can be located near the workpiece without moving the laser beam generator, regardless of the posture of the workpiece. ``Laser machining'' can be performed on workpieces that are difficult to move and change their posture.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Figure 1 is a schematic diagram of the overall configuration, and Figure 2 is a front view of the structure in which the swing angle is halved (!). 1... Base, 2... Rotating table , 3... pivot axis, 4...
・Link, 5...Laser beam focusing device, 7 Bow・
]2・14...reflector, 9...4 proximal side pivot part, 10...4 center folding bar pivot part, 11...5 swinging proximal side pivot part, soil. ...Laser beam, α/β...
Swing angle.

Claims (1)

[Scope of Claims] 1. A rotary table is supported on the base so as to be able to rotate through a hollow pivot shaft, and a link is pivotally supported on this rotary table so that the link can be swung. A laser beam converging device is swingably supported on the moving tip, and a pair of reflecting mirrors are placed on the base side and the rotating table side on the axis of rotation between the base and the rotating table. A 45° inclination angle! Fix the position in the state,
A link-side anti-socket is supported on the swinging base end side pivot part of the link so that it can swing together with the link at an angle of 11゛2, which is the swinging angle of the link with respect to the rotary table, and the swinging base end of the laser beam focusing device The focusing device side reflecting mirror is supported on the side pivot part so as to be able to swing together with the laser beam focusing device at an angle of 172 degrees, which is the swinging angle with respect to the link of the laser beam focusing device, and the mirror is directed toward the reflecting mirror fixed to the base. The laser beam is configured to be able to emit radiation, and the laser beam is reflected in the order of the base-side reflector, the white-side reflector, the link-side reflector, and the convergence device-side reflector so that it is incident on the laser beam convergence device. A laser beam transmission device 2 characterized in that, in the laser beam transmission device according to claim 1, the link is constituted by a center-fold link, and both links are swingable at the center-fold pivot point. At the same time, the reflecting mirror is supported on the laser beam converging device side link in the center bent pivot part so as to be able to swing together at an angle of 1,/'2 of the swinging angle of the laser beam converging device side link with respect to the rotary table side link. Item 3: The laser beam transmission device according to claim 1 or 2, in which the pivot portion of the laser beam condenser is rotatably supported around the link axis with respect to the link.