A pipe fitting anti-deformation welding fixture and a method for preventing pipe fitting deformation by using the fixture

Abstract

The invention relates to the technical field of thermal processing of pipe fittings, in particular to a pipe fitting anti-deformation welding fixture and a method for using the fixture to prevent pipe deformation, wherein the welding fixture includes a support, a fixing device for clamping and fixing a pipe fitting and a The adjustment device of the clamped part; a number of anti-deformation limit blocks are arranged on the support, and the anti-deformation limit blocks include a bottom plate, a support plate and an arc plate arranged above the bottom plate, and one end of the bottom plate is bent downward and extended There is a bending part used to prevent the deformation and movement of the pipe fitting in a certain direction, and the bending part is clamped with the support. Compared with the prior art, the fixture of the present invention has the advantages of anti-deformation function and simple operation, can effectively prevent the pipe fittings from being deformed in a certain direction during thermal processing such as welding, reduce the deformation correction process, reduce the error of the finished pipe fittings, and improve Processing quality of pipe fittings.

Description

technical field [0001] The invention relates to the technical field of pipe fitting thermal processing, in particular to a pipe fitting anti-deformation welding jig and a method for preventing pipe fitting deformation by using the jig. Background technique [0002] Pipeline components (referred to as "pipe fittings") include main pipe fittings and multiple branch pipe fittings. During the production process, a large number of thermal processes such as plasma cutting and welding at different points are often involved. The resulting deformation of the pipe fittings is almost It is an unavoidable defect, and it may even produce "boat-like warping" deformation, and the adjustment of deformed pipe fittings often requires a lot of manpower and material resources, but the effect is not satisfactory. The reason is that the metallographic structure of the workpiece adjusted by local high-temperature fire has changed, resulting in secondary defects such as brittle fracture, cracks, an...

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Problems solved by technology

[0002] Pipeline components (referred to as "pipe fittings") include main pipe fittings and multiple branch pipe fittings. During the production process, a large number of plasma cutting, welding and other thermal processing at different points are often involved. The resulting deformation of the pipe fittings is almost It is an unavoidable defect, and may even produce "boat-like warping" deformation, and the adjustment of deformed pipe fittings often requires a lot of manpower and material resources, but the effect is not satisfactory

The reason is that the metallographic structure of the workpiece adjusted by local high-temperature fire has changed, resulting in secondary defects such as brittle fracture, cracks, and baking marks on the pipe fittings.

[0003] At present, there are no effective preventive measures for the pipe deformation that occurs during the welding of pipe fittings, and effective prevention cannot be carried out in advance. Only manual or mechanical corrections can be made to the pipes that have undergone welding deformation afterwards.

However, manual or mechanical correction of pipes that have undergone welding deformation requires a lot of manpower, material resources and time, and the larger the pipe, the more difficult it is to make corrections. The resulting pipe fittings have large dimensional errors, which seriously affects the processing quality and quality of pipe fittings. Subsequent assembly and use

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