Tool for laser welding of titanium semi-welded plate pieces

Abstract

A tool for laser welding of titanium semi-welded plate pieces comprises an upper cover plate, an upper press plate, a lower locating plate and a lower fixed plate. The upper cover plate and the lowerlocating plate cooperate to clamp the to-be-welded plate pieces. Multiple air guide grooves with the shapes matched with those of welding areas on the plate pieces are formed in the lower locating plate. An air guide area concaved inwards to be used for communicating with the air guide grooves is arranged at the position, located below the to-be-welded plate pieces, of the lower locating plate, and the air guide area covers a welding joint area. The lower locating plate is provided with air inlets and air outlets, and the air inlets and the air outlets communicate with the air guide area. According to the tool, a matched tool clamp is arranged according to the shapes of the titanium semi-welded plate heat exchanger plate pieces, according to the requirements in the laser welding process, the structure of the tool clamp is adjusted, and the gas protection function is added; and fast and automatic locating of the plate pieces is achieved, the locating precision and production efficiencyare improved, the inert gas protection requirement in the welding process is met, and the one-time welding success rate is increased.

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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