High-frequency induction-laser hybrid welding method and device for dowel joint of hollow copper pipe

Abstract

The invention provides a high-frequency induction-laser hybrid welding method for dowel joint of a hollow copper pipe, comprising: clamping the hollow copper pipe; inserting one end of a hollow copper core into the hollow copper pipe; installing a high-frequency induction heater coil below a dowel joint segment; outputting a laser beam for fixed spot welding; cutting out the hollow copper core with pneumatic scissors; outputting the laser beam to form laser girth weld at the tube end of the dowel joint segment; powering on the high-frequency induction heater coil to preheat the dowel joint segment uniformly; achieving the solid phase coupling of the weld metal of the dowel joint segment through an extrusion wheel after the preheating temperature reaches the set value; turning over the hollow copper pipe for 180 degrees horizontally; then welding the other end of the hollow copper pipe. According to the invention, by combining the laser welding technology and the high-frequency induction welding technology together, the problem that the base metal in the traditional simple high-frequency induction welding is easy to melt partially to flow into the copper pipe, resulting in welding obstruction is effectively solved; the invention also provides a high-frequency induction-laser hybrid welding device for dowel joint of the hollow copper pipe.

Description

technical field [0001] The invention belongs to the field of industrial automation, and in particular relates to a high-frequency induction laser composite welding method and device for socketing hollow copper pipes. Background technique [0002] With the technical development of the air conditioning and refrigeration industry and the further strict control of environmental protection regulations, improving the heat transfer coefficient of the heat exchange unit itself is the key to improving the overall heat transfer performance of the heat exchanger and making up for the refrigeration performance caused by the replacement refrigerant itself. Necessary means of reducing. Based on the problem of cooling performance degradation of existing refrigerants and the lack of effective alternative working fluids, relevant companies and scientific research institutions have turned their research objects to the basic components of air conditioning and refrigeration - heat exchanger ele...

AI Technical Summary

Problems solved by technology

However, for the lap welding of socket pipes, since the welding structure itself requires sufficient welding area to ensure the overall strength and mechanical properties of socket joints, single-pass laser welding cannot meet the requirements, and multiple passes of surfacing welding are required, which makes the process cumbersome , cost increases, limiting the application of laser welding in this field

Images