A kind of plasma arc welding method and device for welding sheet tin bronze without preheating

Abstract

The invention discloses a plasma arc welding method and device for welding thin-plate tin bronze without preheating. The method comprises: grinding the welding surface of a workpiece to be welded with sandpaper, cleaning the welding surface with a cleaning solution, and then drying it; The workpiece to be welded is fixed with a specified fixture, and no backing plate is added to the back of the workpiece to be welded; an arc strike plate and a lead-out plate are installed at both ends of the workpiece to be welded, and at the intersection of the arc strike plate and the workpiece to be welded, point Weld to form a complete welding spot, adjust the welding torch and welding wire, and adjust the welding parameters according to the settings. Start the arc on the arc starting plate for welding. After the welding is completed, stop welding and extinguish the arc on the leading plate, and remove the arc starting plate after natural cooling. The device includes a plasma welding machine, a wire feeding system, a welding workbench and a welding control cabinet; the invention adopts wire-filled plasma arc welding, does not preheat thin tin bronze plates, does not use backing plates on the back, and welds on one side and forms on both sides. The process is simple and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of plasma welding, and in particular relates to a plasma arc welding method and device for welding thin plate tin bronze without preheating. Background technique [0002] At present, the welding research of bronze (including tin bronze) is generally brazing and argon arc welding. There has been some research on the argon arc welding method of tin bronze. Automatic argon arc welding is used for thick-walled tin bronze, and the plasticity and strength of the joint are improved; Soldering, also gives good solder joints, but requires preheating of the tin bronze side. Research on other bronze welding includes: TIG welding iron bronze strip achieves the effect of small welding deformation and double-sided forming of weld seam; using SMAW surfacing welding transition layer, GMAW welding to connect weld seam to weld aluminum bronze and marine engineering High-strength steel is used, but it needs to be preheated t...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a plasma arc welding method and device for welding thin-plate tin bronze without preheating. The method does not need to preheat thin-plate tin bronze during welding, and does not need to use a backing plate during welding. In order to solve the problems of complicated welding process and high welding cost in the prior art, the specific technical scheme is as follows:

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