Deep penetrating fillet welding process for hydraulic support structure piece mid-thickness plate welding

Abstract

The invention relates to a deep penetrating fillet welding process for hydraulic support structure piece mid-thickness plate welding. The process comprises the steps of cleaning a to-be-welded area, connecting a welding gun to a welding power supply, preparing welding shielding gas and a solid welding wire, and welding by using a welder. According to the process, the method is reasonable and feasible, weld metal is greatly saved under the same load bearing capacity, welding workload is reduced, the weld joint fusion is improved, the filling material is saved, the welding time is reduced, the weld joint strength is improved, the technical problems that an existing hydraulic support mostly adopts multi-layer and multi-pass welding of a mid-thickness plate, the welding number is excessive, the welding workload is increased, the welding defect probability is increased, the welding failure rate is increased, the welding heat for a weldment is increased, the weld microstructure is coarse, the strength and toughness are reduced, and the product quality and the enterprise production benefit are influenced are solved, and compared with the prior art, the process has good market prospect anddevelopment space.

Description

technical field [0001] The invention relates to the technical field of medium and thick plate welding of hydraulic support structural parts, in particular to a deep penetration fillet welding process for welding medium and thick plates of hydraulic support structural parts. Background technique [0002] The structural parts of the hydraulic support are welded structures of medium and thick plates, and the plate thickness is mainly concentrated between 25-50mm. In particular, most of the welds between the main reinforcement and the top plate are fillet welds of 20-30mm, and the weld angle height is concentrated at 14-50mm. 18mm. Our current welding method is gas metal shielded multi-layer multi-pass welding, and the welding pass layers are as follows: figure 1 As shown, the welding seam ratio of Z18 is about 70%, such as figure 1 The welding seam of Z18 shown needs to be welded 10 times to meet the requirements. At the same time, because the fillet welds of the hydraulic su...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing hydraulic supports mostly use multi-layer and multi-pass welding of medium and thick plates, it is generally said that the fillet welds of hydraulic supports are often used with larger weld leg sizes such as K=20\18\16\14, etc., welders During welding, each weld seam needs 3-10 passes

Images