JPS6326289A - Flexible arm supporting device - Google Patents

Abstract

PURPOSE:To prevent the deflection of a flexible arm and the dislocation of a laser optical axis by supporting the flexible arm for a laser light leading path with its guiding freely rotatably via a cam follower on the circular arc guide which is provided on the frame of a laser oscillator. CONSTITUTION:The 1st flexible arm 40 rotating with a rotary sleeve 50 as the center based on the movement of the 1st direct acting part and 2nd difect acting part of a robot side is moved by being supported by a cam follower 45 and guided by a circular arc guide 43. The weight of the 1st and 2nd flexible arms 40, 41 is supported by the circular arc guide 43. The horizontal adjustment of the guide face of the circular arc guide is performed by a pull bolt 48 and push bolt 49 in order to produce the levelness in the movement of the 1st flexible arm 40.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a flexible arm support device for a light guide path of a laser processing machine that performs processing such as cutting and welding a workpiece with a laser.

<Conventional technology> A laser processing machine that processes a workpiece is designed to guide laser light from a laser oscillator to an optical path section on the robot side that is equipped with a processing head that has a laser torch. The optical path portion of the robot is directly connected to the first and second flexible arms that can rotate and bend freely, and follow the movement of the robot.

<Problems to be solved by the invention> The above-mentioned conventional problem No. 1. In the second flexible arm, deflection occurs due to its own weight, and this deflection causes a change in the angle of a mirror for refraction and reflection of laser light provided within each flexible arm end, causing a problem that the laser optical axis shifts.

Means for Solving the Problems> The present invention solves the above-mentioned conventional problems, and has a structure in which one end of a first flexible arm for a laser light guide is rotated on a pedestal on which a laser oscillator is installed. The f of this first flexible arm is rotatably provided via a sleeve.
t2) In a laser processing machine in which one end of a second flexible arm is bendably connected to J, and the other end of this second flexible arm is connected to an optical path section on the robot side, the center of the rotating sleeve is curvatured on the pedestal of the laser oscillator. A circular arc guide having a radius center is fixed, and a first flexible arm is guided and supported on the circular arc guide via a cam follower.

Function> The present invention supports the weight of the flexible arm using an arcuate guide, and allows the flexible arm to rotate using a cam follower.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. In FIGS. 1 and 2, 1 is a pedestal on which a laser oscillator 2 is installed, and 3 is a robot. The configuration of this robot 3 is as follows.

1O is a head, and pillars 11 are erected at the four corners of its upper surface. A pair of guide rails 12 are provided in parallel between the columns 11, and the first linear motion part 13 is movably guided along the guide rails 12. A ball screw 21 is provided along the guide rail 12 and is rotated forward and backward by a servo motor 22 to move the first linear motion part 13 along the guide rail 12 .

A guide rail 17 is provided on the first M moving section 13 in a direction perpendicular to the guide rail 12, and the second linear moving section 23 is movably guided by the guide rail 17. Reference numeral 19 denotes a ball screw provided along the guide rail 17, which is rotated in forward and reverse directions by the servo motor 20 to move the second linear motion section 23 along the guide rail 17.

Furthermore, a third linear motion part 18 is guided to the second linear motion part 23 so as to be movable up and down, and a laser torch 3 is attached to the third linear motion part I8.
1 is rotatably provided.

A first flexible arm 40 and a second flexible arm 41 for the laser light guide path connect the optical path section of the robot 3 configured as described above and the laser oscillator 2.

As shown in FIG. 3, the first flexible arm 40 is rotatably provided at one end on the lower surface of the pedestal 1 via a rotary sleeve 50, and receives laser light from the laser oscillator 2. The other end of the first flexible arm 40 and one end of the second flexible arm 41 are connected to a joint 51.
The other end of the second flexible arm 41 is connected to the optical path section of the robot 3.

Reference numeral 52 denotes a refracting and reflecting mirror for the laser beam 53.

In the present invention, a bracket 42 is fixed to the lower surface of the pedestal 1, and an arcuate guide 43 whose radius of curvature is centered around the center of the rotary sleeve 50 is fixed to the bracket 42. 47
is an arcuate guide support, which is fixed to the bracket 42 by a pull bolt 48 and a push bolt 49.

On the other hand, an arm support 44 is fixed to the first flexible arm 40, and a cam follower support 46 is fixed to this. A cam follower 45 is pivotally attached to this cam follower support 46, and this cam follower 45
is guided and supported by the arcuate guide 43. Note that in the above configuration, the first flexible arm 40 is connected to the arcuate guide 4.
In addition, the first flexible arm 40 is connected to the arcuate guide 4 via a cam follower.
3 may be used.

Since the present invention has the above-described configuration, the first flexible arm 40 that pivots around the rotating sleeve 50 based on the movement of the first translational part 13 and the second translational part 23 of the three robots is as follows: The cam follower 45 moves while being guided and supported by the circular arc guide 43. The weight of the second flexible arm 40° 41 is supported by the arcuate guide 43.

Further, in order to level the movement of the first flexible arm 40, the guide surface of the arcuate guide 43 is horizontally adjusted using a pull bolt 48 and a push bolt 49.

<Effects of the Invention> As described above, according to the present invention, a flexible arm for a laser light guide connecting a laser oscillator and an optical path section on the robot side can be freely rotated via a cam follower on an arcuate guide provided on a pedestal of the laser oscillator. Because it has a structure that supports guidance,
The flexible arm eliminates its own weight (due to excessive deflection,
This has the effect of eliminating mirror angle changes and preventing deviation of the laser optical axis.

[Brief explanation of the drawing]

FIG. 1 is a front view of a laser processing machine equipped with a device of the present invention, FIG. 2 is a plan view, and FIG. 3 is a partially sectional side view showing essential parts of the device of the present invention. DESCRIPTION OF SYMBOLS 1... Frame, 2... Laser oscillator, 3... Robot, 40... First flexible arm, 41... Second flexible arm, 42... Bracket, 43...
...Arc guide, 45...Cam follower, 50...
rotating sleeve.

Claims (1)

[Claims] One end of a first flexible arm for a laser light guide path is rotatably provided on the pedestal on which the laser oscillator is installed, via a rotating sleeve, and one end of a second flexible arm is refractably connected to the other end of the first flexible arm. , this second
In a laser processing machine in which the other end of the flexible arm is connected to an optical path section on the robot side, an arcuate guide whose radius of curvature is centered at the center of the rotating sleeve is fixed to the pedestal of the laser oscillator, and a first flexible arm is attached to the arcuate guide. A flexible arm support device characterized in that the flexible arm is guided and supported via a cam follower.