A tooling for laser welding of titanium semi-welded plates

Abstract

A tooling for laser welding of titanium semi-welded plates, including an upper cover plate, an upper pressure plate, a lower positioning plate and a lower fixing plate, the upper cover plate and the lower positioning plate cooperate to clamp the plate to be welded, the said The lower positioning plate is provided with a number of air guide grooves whose shape matches the welding area on the plate, and the lower positioning plate located under the plate to be welded is provided with an inwardly concave air guide area for connecting the air guide grooves to each other. The air guide area covers the weld seam area, and the lower positioning plate is provided with an air inlet and an air outlet, and both the air inlet and the air outlet are connected with the air guide area. According to the shape of titanium semi-welded plate heat exchanger plates, the present invention sets matching fixtures, and adjusts the structure of fixtures to add gas protection function according to the needs of the laser welding process, and realizes the fast and automatic plate heat exchanger. Positioning improves positioning accuracy and production efficiency, meets the requirements of inert gas protection in the welding process, and improves the success rate of one-time welding.

Description

technical field [0001] The invention belongs to the field of laser welding, in particular to a tool for laser welding. Background technique [0002] Semi-welded plate heat exchanger, two plates are laser welded to form a plate group, and rubber gaskets are used to seal between the plate groups. [0003] At present, there is no special fixture for laser welding of titanium semi-welded plate heat exchanger plates. Usually, a fixture suitable for laser welding of stainless steel plates is used. This fixture is listed in "Plate Heat Exchanger It is described in "Laser Welding Process and Tooling Control System Design" (Liu Jian). This kind of fixture exerts pressure on the upper and lower two plates at the edge of the plate, so that the welding parts of the two plates are closely attached to facilitate welding. However, after the titanium plate is pressed, the local thinning and the springback deformation rate of the plate are greater than that of the stainless steel plate. On...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the uneven distribution of flow resistance in the shielding gas circulation area caused by welding tooling in the prior art, resulting in uneven distribution of shielding gas, which cannot meet the environmental needs of laser welding of titanium semi-welded plates problem, providing a tool for laser welding of titanium semi-welded plates

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