Ball type laser transmission welding clamping device

Abstract

A ball type laser transmission welding clamping device comprises a PC (personal computer), a stepping motor control system, X-axis, Y-axis and Z-axis feed mechanisms, pressure application mechanisms, a connecting mechanism and a pressing mechanism, wherein a hydraulic control system adjusts a small hydraulic ejector pin, so that the sum of downward pressing force of four press rods is equal to a pre-pressing force; the connecting mechanism transfers the pressing force to a clamping mechanism, so that the downward pressing force of a pressing block is equal to the pre-pressing force; a bottom die in the pressing mechanism is matched with an upper pressing device to clamp an upper workpiece and a lower workpiece, so that the curved surface workpiece is clamped; and the stepping motor control system controls laser to move along a preset line, and the curved surface workpiece is welded. The laser transmission welding clamping device for thermoplastic plastics can weld the curved surface workpiece, meanwhile, the welding path and pressing force can be accurately controlled, the overall strength and stiffness of a weld assembly are improved, a plurality of balls are used for pressing, single-point contact is avoided, and the quality of a processing workpiece is improved.

Description

technical field [0001] The invention relates to the field of laser transmission welding, in particular to a clamping device for laser transmission welding between thermoplastics or between thermoplastics and metal materials, in particular to a ball-type laser transmission welding clamping device. Background technique [0002] Plastic products have the advantages of light weight, high strength, low density, low cost, excellent elasticity, and corrosion resistance. Therefore, plastics are used more and more widely, especially thermoplastics. Most thermoplastic products are molded products. Affected by injection molding, extrusion processing technology and mold making, many plastic products with irregular shapes or complex structures are difficult to be injection molded at one time. Usually the most economical and effective method is Combining multiple simple injection molded parts, a variety of joining methods for thermoplastics have emerged. Traditional mechanical connection...

AI Technical Summary

Problems solved by technology

The disadvantage is that only some planar welds (that is, the surface is required to be flat) can be welded, and the welding of three-dimensional welds cannot be realized, but the application of three-dimensional weldments in practical applications is more and more

Secondly, the Globo welding device invented by Leister is quite ingenious. Its welding head has a glass ball. This glass ball can not only focus the laser beam, but also exert a pressing force. Its main advantage is that it can realize any three-dimensional welding seam. Welding, and the structure is compact, but it uses a single point of contact, which is likely to lead to stress concentration after welding. In addition, the long-term rolling friction of the glass ball will easily cause the surface of the glass ball to wear and make the optical performance of the glass ball worse. Therefore, there is an urgent need for a A device that can overcome this disadvantage

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