Laser-welded compressor shell body and welding method thereof

Abstract

The invention discloses a laser-welded compressor shell body. The laser-welded compressor shell body comprises a lower shell body (2) and an upper cover (1) matched with the lower shell body, and theshape of the connection section of the upper cover (1) and the lower shell body (2) is elliptical; the upper cover (1) and the lower shell body (2) are matched by a spigot; and the maximum clearance of the spigot matching is 0.5 mm. The invention further discloses a laser welding method of the compressor shell body. According to the technical scheme, the continuous laser welding is achieved, the welding efficiency is high, and the welding strength is higher than base metal cold rolled steel or hot rolled steel; the welding joint strength is high; the appearance is neat and beautiful; and fiberlaser welding is based on the fusion of a self shell plate to for a molten pool connection, a welding wire is eliminated, the thermal deformation area is small, thus the damage of laser heat conduction to a pump body enclosed in the shell body is greatly reduced, the product cost is lowered, and the appearance quality and reliability of the product are improved.

Description

technical field [0001] The invention relates to a refrigeration compressor and its manufacturing technology, in particular to the welding structure and laser welding method of the upper and lower shells of the compressor. Background technique [0002] At present, shell welding is the bottleneck of the entire compressor production process, and the welding efficiency is low, resulting in limited production capacity. At the same time, the consumables in the welding process are relatively large. For example, welding wire is required for each compressor welding. During the welding process, welding leakage often occurs, resulting in slag in the welding of the compressor, water ingress during the water inspection, and some even lead to the entire compressor. The machine is scrapped. Due to the use of welding wire in the welding process, welding slag often appears around the welding surface of the shell, which seriously affects the appearance of the compressor. Therefore, a brushin...

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Problems solved by technology

[0002] At present, shell welding is the bottleneck of the entire compressor production process, and the welding efficiency is low, resulting in limited production capacity

At the same time, the consumables in the welding process are relatively large. For example, welding wire is required for each compressor welding. During the welding process, welding leakage often occurs, which leads to slag in the welding of the compressor, water ingress during the water inspection, and some even lead to the entire compressor. machine scrap

Due to the use of welding wire in the welding process, welding slag often appears around the welding surface of the shell, which seriously affects the appearance of the compressor. Therefore, it is necessary to add a brushing and slag removal process after the ring welding, which is time-consuming, laborious and expensive.

[0003] In the prior art, laser welding has not been able to be applied to the welding technology of the compressor shell due to the limitation of structural shape and process

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