Light-transmitting pressing plate, welding fixture, welding device and welding method of welding device

Abstract

The invention discloses a light-transmitting pressing plate, a welding fixture, a welding device and a welding method of the welding device. The light-transmitting pressing plate comprises an outer peripheral pressing plate, an inner peripheral pressing plate and connecting ribs, wherein the outer peripheral pressing plate defines a mounting area; the inner peripheral pressing plate is arranged in the mounting area; a hollow area which has a predetermined depth and can allow laser to pass through is formed between the inner peripheral pressing plate and the outer peripheral pressing plate; and the connecting ribs are connected between the outer peripheral pressing plate and the inner peripheral pressing plate, and used for connecting the outer peripheral pressing plate and the inner peripheral pressing plate into a whole. The service life of the light-transmitting pressing plate can be guaranteed, the light-transmitting pressing plate does not need to be replaced, cost is reduced, and production efficiency is improved; meanwhile, due to the fact that the outer peripheral pressing plate and the inner peripheral pressing plate are connected into a whole through the connecting ribs, the contact area between the light-transmitting pressing plate and a to-be-welded part can become larger, uniform and good pressing force can be easily generated, and the final welding quality can be improved.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a light-transmitting press plate, a welding jig, a welding device and a welding method thereof. Background technique [0002] At present, the laser welding of thermoplastics adopts the principle of transmission welding, that is, the two parts to be welded are overlapped and placed together, the upper part can pass through the laser and the lower part must be able to absorb the laser, and then form on the contact surface (welding area) of the two parts. In the heat action zone, the plastic in the heat action zone is melted, and the molecules of the plastic in the molten state diffuse each other under the action of pressure, resulting in van der Waals force, so that the two pieces are closely connected together, so that the melted material A joint is formed and the parts to be welded are joined. [0003] When using the above welding method for sealing welding (the welding track i...

AI Technical Summary

Problems solved by technology

These methods have obvious disadvantages: transparent acrylic has a low melting point, and the heat generated by the laser is easy to melt and damage the acrylic, which needs to be replaced regularly; brittle materials such as transparent glass have a high melting point but are not easy to process, and samples with complex welding tracks cannot be processed. And it is relatively easy to break, and it needs to be replaced regularly; using metal as a pressure plate will easily cause warping and deformation in the middle of the upper part, which will affect the final quality of welding

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