Connecting method for magnetic pulse forming auxiliary brazing metal pipes

Abstract

The invention discloses a connecting method for magnetic pulse forming auxiliary brazing metal pipes. The connecting method comprises the following steps that two metal pipes needing to be connected are divided into an inner pipe and an outer pipe according to the diameter size; brazing filler metal is laid on the outer wall of the inner pipe; the inner pipe and the outer pipe are connected in a sleeving mode, and the sleeved connection area between the inner pipe and the outer pipe is adjusted and aligned; magnetic pulse discharging forming is conducted on the sleeved connection area formed by the inner pipe and the outer pipe through an electromagnetic forming coil by means of an electromagnetic forming machine; heating brazing is conducted on the sleeved connection area formed by the inner pipe and the outer pipe through a heating coil by means of an electromagnetic induction heating device. According to the connecting method, the purpose that the dissimilar metal pipes are directly brazed in a common environment is achieved, the problems generated in efficient brazing filler metal distribution and a vacuum welding environment in dissimilar metal pipe brazing are solved, the brazing efficiency is improved, and automated production is convenient to achieve; the connecting method is green and environmentally friendly and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a connection method for brazing metal pipe fittings assisted by magnetic pulse forming. Background technique [0002] At present, the problems of environmental protection and resource consumption are becoming more and more serious. With the continuous development of high-tech fields such as automobiles, ships, and aerospace, how to save energy, reduce emissions and save resources is the focus of social attention. Aluminum alloy has low density, high strength, good plasticity, excellent electrical conductivity, thermal conductivity and corrosion resistance, copper has excellent electrical conductivity, thermal conductivity, corrosion resistance and good weldability, and is an excellent heat exchanger﹑ Pipeline production materials, aluminum alloy tubes and copper tubes have been widely used in aviation, aerospace, automobiles, machinery manufacturing, ships and chemical industrie...

AI Technical Summary

Problems solved by technology

At present, due to the limitation of ultrasonic energy, ultrasonic brazing is difficult to weld large-size pipe fittings. In addition, in order to obtain higher-quality welded joints, brazing material distribution and vacuum welding environment are also two major problems that ultrasonic brazing needs to solve urgently.

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