Novel welding device and method based on high-frequency current proximity effects

Abstract

The invention discloses a novel welding device and method based on high-frequency current proximity effects. The welding device comprises a pressing device, a high-frequency welding heating device, animage acquisition device, a pressure sensor, a central controller and a temperature measuring device, wherein the pressing device is used for pressing a tube blank to realize butt joint of welding seam edges of the tube blank before welding heating and is arranged at the front end of the high-frequency welding heating device; the high-frequency welding heating device is arranged between a squeezeroller and the pressing device; the image acquisition device is used for respectively collecting rear welding seam edge images of the pressing device and welding seam area images after welded tube welding squeezing; the pressure sensor is used for measuring the pressing force of the pressing device on the tube blank; the central controller is used for recording collected welded tube sizes and wall thickness information and preliminarily calculating and adjusting the positions of pressing mechanisms and the distance between an anode contact and a cathode contact of the high-frequency welding heating device; and the temperature measuring device is arranged at the tail end of the high-frequency welding heating device and used for measuring the temperature after welding heating. The welding device can improve the welding quality of the high-frequency welded tube and reduce current losses on invalid paths and suppress generation of burrs.

Description

technical field [0001] The invention relates to the field of high-frequency welding, in particular to a novel welding device and method based on the proximity effect of high-frequency current. Background technique [0002] High-frequency straight seam welded pipe welding uses skin effect and proximity effect to concentrate high-frequency current energy on the V-shaped corner area of ​​the weld edge, and rapidly heats the edge of the weld to the welding temperature. The existing high-frequency welding methods for steel pipes are divided into induction welding and contact welding. Induction welding mostly uses circular coils, and contact welding is to apply electrodes on both sides of the welding V-shaped corner. In addition to concentrating on the edge of the weld seam for effective welding seam heating In addition to the current, the energy consumption caused by the ineffective current that heats the entire tube blank is relatively large. When the welded pipe welding is squ...

AI Technical Summary

Problems solved by technology

The existing high-frequency welding methods for steel pipes are divided into induction welding and contact welding. Induction welding mostly uses circular coils, and contact welding is to apply electrodes on both sides of the welding V-shaped angle. In addition to the current, the energy consumption caused by the inactive current that makes the entire tube blank heat is relatively large

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