Laser circumferential seam welding fixture and method for multi-layer thin-walled annular parts

Abstract

The invention discloses a laser circumferential seam welding fixture for multilayer thin-walled annular parts and a method. To-be-welded multilayer thin-walled annular parts are clamped through a positioning disc and a pressing disc, and the external diameters of single layer thin-walled annular parts are greater than the external diameters of the positioning disc and the pressing disc, so that welding adhesion between the thin-walled annular parts and the positioning disc and the pressing disc is avoided; both the positioning disc and the pressing disc are made of red copper T2 material and are subjected to chrome-faced treatment; the excellent thermal conductivity and heat dissipation of the red copper are utilized so that welding deformation can be effectively prevented in the laser circumferential seam welding process of the multilayer thin-walled annular parts; non-adhesion during welding of a chromium coating and high-temperature materials are utilized so that welding adhesion between components and a fixture body can be effectively prevented, welding efficiency is greatly improved, and the qualified rate of product welding is ensured; in the welding process, the welding speed adopts the circumferential rotating speed being 0.95 r / min, the longitudinal feeding speed is 0.25 mm / r, and it can be ensured that a small section of welding seam is overlapped for each circumferential seam welding and the position of next circumferential seam welding is accurate.

Description

technical field [0001] The invention belongs to the technical field of welding technology, and in particular relates to a fixture and method for laser circumferential seam welding of multi-layer thin-walled annular parts. Background technique [0002] This method is a process method for laser circumferential seam welding of multi-layer thin-walled ring parts. At present, for multi-layer thin-walled ring parts, laser circumferential seam welding parts, traditional welding methods, for multi-layer (7 layers) δ = 0.25mm Circumferential seam welding of ring parts made of thin-walled GH605 is prone to ablation and collapse. Therefore, the welding method of laser circumferential seam welding is adopted, but when the welding method of laser circumferential seam welding is used, it is easy to cause adhesion between parts and fixtures. And the welding deformation is large, and the follow-up method of separation of fitters and thermal stabilization treatment with heat treatment fixtur...

AI Technical Summary

Problems solved by technology

[0002] This method is a process method for laser circumferential seam welding of multi-layer thin-walled ring parts. At present, for multi-layer thin-walled ring parts, laser circumferential seam welding parts, traditional welding methods, for multi-layer (7 layers) δ = 0.25mm Circumferential seam welding of ring parts made of thin-walled GH605 is prone to ablation and collapse. Therefore, the welding method of laser circumferential seam welding is adopted, but when the welding method of laser circumferential seam welding is used, it is easy to cause adhesion between parts and fixtures. And the welding deformation is large, and the follow-up method of separation of fitters and thermal stabilization treatment with heat treatment fixtures can ensure the requirements of the design drawings

It is easy to further increase the deformation of the parts in the process of separating the parts and fixtures by the fitter, and even cause the parts to be scrapped due to tearing, and the product qualification rate is low

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