Automatic narrow-gap tungsten inert-gas arc welding equipment for thick stainless steel plate

Abstract

The invention discloses automatic narrow-gap tungsten inert-gas arc welding equipment for a thick stainless steel plate, and relates to the technical field of narrow-gap welding equipment. The welding equipment comprises a mounting frame and a welding gun body, wherein the welding gun body is rotationally matched with the mounting frame; the welding gun body comprises a fixed cavity; a nozzle is arranged at the bottom of the fixed cavity; an annular gear rack is fixedly connected between the top of the fixed cavity and the outer wall of the nozzle; the gear rack is meshed and matched with the annular gear rack; a first C-shaped fixing plate and a second C-shaped fixing plate are sequentially arranged on the surface of the Z-shaped supporting plate and located on two sides of a copper plate in a sliding fit mode. An annular handle is rotated to drive a threaded rod to rotate, so that the gear rack moves along the threaded rod, the annular gear rack is thus driven to rotate, and fine adjustment of the orientations of the welding gun and the nozzle is achieved; two welding pieces are fixed through the two C-shaped fixing plates correspondingly, a first electric hydraulic cylinder is started to drive the two C-shaped fixing plates move together with the two welding pieces, and thus welding operation is achieved.

Description

technical field [0001] The invention belongs to the technical field of narrow-gap welding equipment, in particular to a narrow-gap tungsten argon arc welding automatic equipment for thick stainless steel plates. Background technique [0002] Narrow gap welding (NGW) is mainly used in the welding of thick plates. Before welding, the position of the welded joint does not have a groove or a small angle groove, and a narrow and deep gap is left. It is realized by traditional welding methods. Efficient welding of workpieces. Narrow gap welding has the following advantages: the narrow gap can greatly reduce the amount of filler metal and reduce the cost of raw materials; the welding heat input is low, the heat-affected zone is narrow, and the mechanical strength of the welded joint is good; the deformation is small, the residual stress is small, and the mechanical The performance is excellent, and the shape of the workpiece after welding is easy to control; the production efficie...

AI Technical Summary

Problems solved by technology

[0006] 2. This utility model and most of the existing narrow-gap argon tungsten arc welding automatic equipment use the moving welding torch for welding. However, the welding torch has a complex structure. During the moving process, it is easy to cause misalignment of the adjustment parts and reduce the welding accuracy. Affect the appearance of the welding seam; and when the welding torch is moving, it is easy to cause turbulent flow of the argon shielding gas coming out of the nozzle, so that the reliability protection of the welding area is damaged

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