A concentric thin-walled steel pipe welding machine

Abstract

The invention discloses a concentric thin-walled steel pipe welding machine, which comprises a vertically arranged welding column with a cylindrical outer wall, used to cover two welded steel pipes, and a plurality of horizontally arranged welding columns centered on the central axis of the welding column The welding heads are distributed in a circular array to realize simultaneous gathering and dispersing; the welding heads and the welding columns are respectively connected to the positive and negative poles of the power supply. When all the welding heads are gathered around the central axis of the welding column at the same time until the front end of the welding head is in contact with the welded steel pipe located on the periphery, the welding head is connected to the welding column through the welded steel pipe, the circuit is closed, and the resistance heat at the welding point is used to realize Electric welding of the welded steel pipe; the above-mentioned concentric thin-walled steel pipe welding machine can adjust the heat generated at the welding place by controlling the size of the welding current and the length of time the welding head contacts the welded steel pipe, so as to avoid the welded steel pipe being worn out due to excessive heat at the welding place through.

Description

technical field [0001] The invention relates to the field of steel production, in particular to a welding machine for concentric thin-walled steel pipes. Background technique [0002] Steel pipes, especially thin-walled steel pipes, are mostly welded by electrode arc welding. During operation, workers clamp two welded steel pipes to the fixture, and manually select three welding points for point-by-point welding. This method not only consumes more time and has low production efficiency due to step-by-step operation, but also easily causes large deviations in the concentricity of the two thin-walled steel pipes; Heat, and heat is difficult to control, so it is very easy to penetrate the steel pipe, causing irreversible quality problems. Contents of the invention [0003] The object of the present invention is to provide a concentric thin-walled steel pipe welding machine, which can not only avoid the eccentricity of the welded steel pipe, but also make the heat of the weld...

AI Technical Summary

Problems solved by technology

This way, due to the step-by-step operation, not only takes a lot of time, but also has low production efficiency, and it is easy to cause a large deviation in the concentricity of the two thin-walled steel pipes; Heat, and heat is difficult to control, so it is very easy to penetrate the steel pipe, causing irreversible quality problems

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