Large-area sealing resistance welding process for circumferences of tank body and sealing end cover

Abstract

The invention provides a large-area sealing resistance welding process for circumferences of a tank body and a sealing end cover. By the adoption of the process, a large current can be output within ashort time, and the short time means time shorter than 20-30 milliseconds, the large current refers to the current of 1 million amps or more, and few grids are required; and the joint between the tank body and the sealing end cover which are welded has the beneficial effects of the tight weld seam, good sealing and good pressure resistance. The base material can be directly melted without the help of or use of welding materials in the whole process of welding, no fume polluting the environment and irritating gases are generated, the floor space of the equipment can be reduced and the requirement for the welding materials can be reduced compared to furnace brazing, the energy-saving and environmentally friendly use is realized, and the yield is high.

Description

technical field [0001] The invention relates to a large-area sealing resistance welding process on the circumference of a tank body and a sealing end cover. Background technique [0002] The inlet and outlet of the existing container tanks are generally connected through threaded ports, and the welding process of the tank body seal is basically welded by arc welding or brazing process, whether arc welding or brazing process is used To weld the seal of the tank body, it has the disadvantages of large heat-affected zone, large equipment footprint, high production cost and low production efficiency, and it needs to use welding materials in the welding process, and the use of welding materials will A large amount of smoke and irritating gas polluting the environment are produced, resulting in a poor working environment for the staff, which does not meet the requirements of the enterprise's environmental protection production. Especially for products welded by brazing technology...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a large-area sealing resistance welding process for the circumference of the tank body and the sealing end cover, which can output a large current of more than 1 million amperes within 20-30 milliseconds to firmly secure the tank body and the sealing end cover Welded together, using this resistance welding process to complete the welding of the welded tank body and the sealing end cover to prevent the phenomenon of pores, it has the advantages of good sealing and pressure resistance, and it does not need to use during the whole welding process Or use the welding material to directly melt the base metal, which will not produce smog and irritating gas that pollute the environment, and can reduce the demand for welding materials, use energy saving and environmental protection, and have a high yield rate. The use of welding or brazing process to weld the tank body and the sealing end cap requires the use of welding materials. The use of welding materials will produce a lot of smoke and irritating gases that pollute the environment, resulting in poor working environment for the staff and making them hot. Problems of large impact area, large equipment footprint, high production cost, low production efficiency and low yield rate