A titanium alloy surfacing gas shield fixed to a welding torch

Abstract

The invention relates to a titanium alloy surfacing gas protective cover fixed to a welding gun. The titanium alloy surfacing gas protective cover fixed to the welding gun comprises a base, a fixing cross beam and front covers. The fixing cross beam is arranged in the middle of the base and provided with two side walls used for clamping the welding gun. The front covers are symmetrically arranged on the two sides of the side wall of the fixing cross beam. First gas circuit loops are arranged inside the front covers, and second gas circuit loops nested with the first gas circuit loops are arranged on the base. A threaded hole connected with an external air pipe is formed in the upper portion of each front cover. Gas jet holes are formed in the lower portions of the front covers. According to the titanium alloy surfacing gas protective cover, through symmetrical cavities which are provided with the gas circuit loops and located on the two sides, protective gas is blown out from the gas jet holes in a symmetrical fan shape and located on the same line with a nozzle of the welding gun; the protective cover is erected above a welding bead and covers the whole welding bead from top to bottom, a gas protective film is formed around a whole surfacing layer, the whole surfacing layer is better protected, and the defect that in the prior art, protection of a gas circuit passing through the welding gun is insufficient is overcome; and the structure is simple, the gas protection effect is obvious, and the protection effect in the electric arc surfacing process of titanium alloy is good.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a titanium alloy surfacing gas shield fixed on a welding torch. Background technique [0002] Titanium and titanium alloys have good corrosion resistance, high specific strength, excellent high temperature performance and processability, and are widely used in various fields such as aviation, aerospace, chemical industry and metallurgy. Titanium alloy parts are usually machined after casting or forging. Complex parts often have to cut 90% of the material, which is low in efficiency and high in cost. However, arc additive manufacturing technology can greatly reduce costs and improve efficiency. . Since titanium will absorb hydrogen, oxygen, and nitrogen in the atmosphere during the arc surfacing welding process of titanium alloy, which will seriously affect the welding quality. When surfacing welding is used, a gas shield must be used to fully protect the welding area, while the...

AI Technical Summary

Problems solved by technology

When welding, the device covers the part to be welded, and the welding torch is bound to the welding torch fixing device with a metal hoop, and then the gas is introduced into the protective cover through the argon gas inlet tube, but the protective gas flow rate of this patent is different in each gas The distribution of sieve holes is uneven, the protective gas is relatively scattered, and the air is easy to be involved through the welding operation hole, which reduces the protection effect. In addition, there is a gap between the protective cover and the pipe wall under the welding operation hole, which may cause air to be involved in the welding operation hole. Blow out from the gap, thereby reducing the protection effect. At the same time, due to the small welding operation hole, the operation is limited, which is not conducive to the use of high-speed cameras and other equipment to observe and study the welding dynamic process, and this invention is only applicable to tubular welding processes such as titanium tubes.

Images