JPH02235591A - Portable type laser beam welding gun - Google Patents

Abstract

PURPOSE:To constitute the subject portable type laser beam welding gun where welding work is simplified by providing a laser beam head on one arm oh a conventional portable type welding gun, connecting it with a laser beam oscillator via an optical fiber and forming a work receiving part on the other arm. CONSTITUTION:The laser beam head 6 is provided on the top of one arm 2 of the conventional manual portable type X gun 1 and connected with the YAG laser beam oscillator 8 via the optical fiber 9 and the work receiving part 10 is provided on the top of the other arm 3. By this constitution, teh arms 2 and 3 are opened and closed by a cylinder 4 and works 11 are sandwiched between the beam head 6 and the work receiving part 10 and further, pressed by operation of the cylinder 4. The YAG laser beam oscillator 8 is the operated and a YAG laser beam is led to the beam head 6 via the optical fiber 9 and condensed by a condensing lens 7 and the works 11 on its focus are welded. By this method, welding work is easily performed at an optional place.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a portable laser welding gun that spot-welds workpieces using a YAG laser, either manually or by a robot.

[Prior Art] A fixed type welding machine for butt welding thin iron plates using a Koya laser is well known, as shown in, for example, Japanese Patent Laid-Open No. 60-221185.

[Problems to be Solved by the Invention] By the way, the welding machine in the prior art is of a fixed type, so the welding work can only be done at a specific location, which is inconvenient as it is impossible to weld at any location. Moreover, if this is to be used for spot welding, there is a problem in that it is necessary to prepare a special workpiece holding member, pressurizing member, etc.

This invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to provide a laser head on one arm of a conventional portable welding gun to The present invention aims to provide a portable laser welding gun that allows easy welding work without the need to prepare additional welding locations, special work holders, and pressure members.

[Means for Solving the Problems] In order to achieve the above object, the portable laser welding gun of the present invention has the following features: A laser head is provided on one arm of the portable welding gun, and the laser bed and the YAG laser generator are connected to each other. The two arms are connected by optical fiber, and the other arm forms a work receiving section.

[Operation] When the workpiece is held between the laser head and the other arm and the workpiece is in a pressurized state, the YAG laser is conveyed from the YAG laser excavator to the laser head via the optical fiber, and the YAG laser is delivered to the laser head by the laser head. The focused light is irradiated onto the workpiece' and used for welding work.

[Example] An embodiment of the invention will be described with reference to FIG.

In the figure, reference numeral 1 denotes a conventionally well-known manually operated portable X-gun, in which gun arms 2 and 3 are connected to a cylinder 4 by means of a cylinder 4.
Open and close using the fulcrum.

A laser head 6 is attached to the tip of the arm 2, has a condensing lens 7 inside, and is connected to a YAG laser oscillator 8 via an optical fiber 9.

Note that lO is a workpiece receiving part formed at the tip of the arm 3, and works together with the laser head 6 to receive the workpiece l1.
to support.

In the portable laser welding gun according to the embodiment of the present invention having the above configuration, when the gun arms 2 and 3 are opened and closed by the cylinder 4 and the work l1 is supported between the laser head 6 and the work receiving part 10, the cylinder 4 further operates to pressurize the work 11 between the laser head 6 and the work receiving portion 10. Next, the YAG laser initiator 8 is activated to transport the YAG laser through the optical fiber 9 and guide it to the laser head 6. This YAG laser is condensed by a condensing lens 7 in a laser head 6, and performs welding work on a workpiece at its focal point.

Since the welding gun according to the present invention is portable, the welding work location can be moved arbitrarily.

Although the above embodiments have been described with reference to a manually operated portable X-gun, it goes without saying that the present invention can also be applied to a robotic portable X-gun or a manual or robotic portable C-gun.

[Effects of the Invention] According to this invention, the laser welding gun is made portable, so the welding work does not require a specific location and can be performed at any location.
There is no need to newly prepare a pressure member, and there is no need to use a conductive material for the arm, resulting in an inexpensive laser welding gun.

[Brief explanation of the drawing]

FIG. 1 shows a side view of a portable laser welding gun according to the present invention. 1... Portable welding gun, 2, 3... Gun arm, 6
...Laser Head, 8...Yag Laser Generator,
9...Optical fiber lO...Work receiving part. Figure 1

Claims (1)

[Claims] A portable laser welding gun, characterized in that a laser head is provided on one arm of the portable welding gun, the laser head and a YAG laser oscillator are connected by an optical fiber, and the other arm constitutes a work receiving part.