Auxiliary device and method for stainless steel pipe welding

Abstract

The invention discloses an auxiliary device and method for stainless steel pipe welding. The device comprises a hose clamp. The hose clamp comprises a stainless steel clamp band. One end of the clampband is fixedly connected with a clamp hoop shell and a clamp band shell which are integrated. The free end of the clamp band is inserted into the clamp band shell to form a closed ring. A bolt is screwed into the clamp hoop shell to lock the clamp band. The clamp band is provided with at least two auxiliary welding holes. The surface of the clamp band and the walls of the auxiliary welding holesare provided with high-temperature-resistant layers. The auxiliary device for stainless steel pipe welding has the characteristics of being simple in structure, capable of assisting a connecting partof a stainless steel pipe in accurate locating and also capable of stably charging shielding gas to the back side of a weld seam.

Description

technical field [0001] The invention relates to the technical field of stainless steel pipe welding, in particular to an auxiliary device and method for stainless steel pipe welding. Background technique [0002] In the case of some steel pipes, the precision of the butt joint of the steel pipes is required to be high. The conventional manufacturing method of the piping system (that is, the lower end of the pipe is supported by an angle iron, and manual adjustment and correction) is not only time-consuming, but also the quality of the butt joint cannot meet the requirements. In addition, when argon-arc welding of stainless steel seams is used as the base welding, because the oxidation reaction of chromium (Cr) in the base metal is very active, if there are no suitable protection measures, the weld formation on the back is easily corroded and oxidized during the welding process, and the internal Elements were burned, resulting in bean curd slag-like welding defects, resultin...

AI Technical Summary

Problems solved by technology

The conventional manufacturing method of the piping system (that is, the lower end of the pipe is supported by an angle iron, and manual adjustment and correction) is not only time-consuming, but also the quality of the butt joint cannot meet the requirements

In addition, when argon-arc welding of stainless steel seams is used as the base welding, because the oxidation reaction of chromium (Cr) in the base metal is very active, if there are no suitable protection measures, the weld formation on the back is easily corroded and oxidized during the welding process, and the internal Elements are burned, resulting in bean curd slag-like welding defects, resulting in a decrease in the corrosion resistance of the weld, and the final test results do not meet the specification requirements

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