Automatic tube sheet welder positioning device

Abstract

The invention belongs to the field of spiral coil heat exchangers, and relates to the field of rotary argon protection automatic welding of heat exchange tube orifices and tube sheets, in particular to an automatic tube sheet welder positioning device which comprises horizontal, vertical and front-back linear movable guide rails. According to the automatic tube sheet welder positioning device, conical positioning mandrel and the rotating center of an adjustable-speed motor are coaxial, radial and axial positioning are performed, the conical positioning mandrel and a workpiece heat exchange pipe of a welding head are firstly positioned, retraction of the conical positioning mandrel is realized, a welding seam position is reserved, and welding cannot be affected. The rotating center of the welding head cannot deviate from the center of the heat exchange pipe after the positioning mandrel retracts, welding cannot be affected, and movable locking mechanisms are locked anywhere.

Description

technical field [0001] The invention belongs to the field of tube-wound heat exchangers, in particular to the field of rotary argon-protected automatic welding of heat exchange tube nozzles and tube plates, and in particular to a tube plate automatic welding machine positioning device. Background technique [0002] Various stainless steel coiled tube heat exchangers are widely used in chemical industry, air separation, light industry and other industries. After the heat exchange tube of the wound tube heat exchanger is wound, both ends need to pass through the tube plate hole and be welded and sealed with the tube plate. Generally, argon arc welding is used for stainless steel products. Manual argon arc welding and automatic argon arc welding can be used for tube sheet welding; manual welding is flexible and convenient, but the appearance and internal quality of the weld are unstable; automatic welding is used for welding, and the weld can achieve stable appearance and inter...

AI Technical Summary

Problems solved by technology

[0005] However, when using flat seam welding, due to the flow of the weld liquid, the weld reinforcement after solidification will exceed the inner wall of the pipe, making the orifice size smaller than the inner diameter of the pipe. At this time, when the cylindrical mandrel is used for positioning, due to the shrinkage of the orifice, there The mandrel is not easy to pull out from the tube hole, and even the positioning mandrel cannot be pulled out at all, which seriously affects the normal operation of the automatic welding of the tube sheet

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