Anti-oxidation automatic welding method for process holes of titanium alloy pipelines in satellite propulsion system

Abstract

The steps of the anti-oxidation automatic welding method for titanium alloy pipeline process holes in satellite propulsion system are as follows: (1) according to the size of the process hole, a process plug with a small through hole in the center is equipped to block the process hole; (2) before welding, the pipe A small amount of inert protective gas is passed through the inside of the road, and the gas escapes through the tiny through hole in the center of the process plug, forming a partial protection zone for flow on the inner wall of the process hole; (3) Place the welded pipe clamp on the all-position automatic welding equipment on the On the process hole of the plug, the precision welding power source of the all-position automatic welding equipment is used to complete the welding with high current in a short time, so that the oxidation time of the weld is greatly shortened, and the weld metal solidifies quickly. The invention overcomes the limitation of placing the product in a vacuumized inert gas protection container for anti-oxidation welding, and can be used for products of satellite propulsion systems of any size to carry out anti-oxidation welding of pipeline process holes at any part of the whole star. It has been used in Welding of dozens of satellites including my country's new generation of large-scale communication satellites.

Description

technical field [0001] The invention relates to an anti-oxidation automatic welding method for a titanium alloy pipeline process hole of a satellite propulsion system, which is used for the final blocking welding of the entire star process hole during the welding process of the pipeline system. Background technique [0002] my country's satellite propulsion system is currently manufactured by welding titanium alloy pipelines. Since titanium alloys are easy to oxidize, an inert protective gas needs to be passed through the conduit during welding to prevent oxidation of the inner wall of the weld. Since the communication series satellite propulsion system adopts the dual-component unified propulsion mode and the structural design is special, the gas cylinders and some pipe valves have only air inlets and no air outlets, so a φ2 opening is added on the other side of the pipeline ring weld process holes, such as figure 1 As shown, it is used as the gas outlet of the internal sh...

AI Technical Summary

Problems solved by technology

[0006] The problem solved by the technology of the present invention is: to overcome the deficiencies of the prior art, and to provide an automatic anti-oxidation welding method for titanium alloy pipeline process holes in the satellite propulsion system, which solves the problem of oxidation on the inner wall of the weld, thereby overcoming manual welding The time is long, the parameters are unstable, and it is prone to shortcomings such as tungsten inclusions and oxidation of the inner surface of the weld. At the same time, it also overcomes the problem that the pipeline system cannot be placed in a closed anti-oxidation container to vacuumize and fill inert protective gas welding.

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