A kind of variable polarity plasma conical circular seam welding equipment and its welding method

Abstract

The invention relates to a kind of polarity-changing plasma conical circular seam welding equipment and its welding method. The welding equipment includes a cone section welding tool, a rotary positioner, a positioning plate and a welding operation frame system. The cone section welding tool includes an upper cover plate , upper cone tire, first upper pressure ring, first lower pressure ring, second upper pressure ring, second lower pressure ring, column, pull / strut assembly, coaxial positioning block, inner support assembly and chassis base, The equipment uses a set of cone tire fixtures to complete the plasma assembly, machining and welding of circular seams with two diameters and two cone angles. The carcass can be accurately positioned in the circumferential direction of the welding workpiece through the circumferential positioning device; Through the positioning surface designed on the cone tire and the axial fine-tuning screw, the axial positioning of the welding workpiece is completed, and the vertical assembly and horizontal welding method is adopted to solve the pre-weld assembly, machining, and welding problems of the large-diameter cone section cylinder. , and can obtain higher assembly efficiency and assembly and machining accuracy, thereby obtaining higher post-weld quality.

Description

technical field [0001] The invention belongs to the technical field of aerospace vehicle welding technology, and relates to a polarity-changing plasma welding equipment used for the tapered circular seam of a large aluminum alloy wall plate sealing cabin body and a welding method using the equipment. Background technique [0002] In 1968, based on the welding process of DC plasma, the Boeing Company of the United States proposed the idea of ​​the variable polarity plasma welding process, and then the Advanced Technology Department of Hubbert Brothers cooperated with Boeing to develop the first variable polarity plasma for industrial applications. welding power source. The development of VPPA power supply is developing rapidly abroad. At present, developed countries such as the United States and Japan have already released products with reliable quality. AMET in the United States adopts DSP technology to develop a multi-processor networked parallel controller and a higher re...

AI Technical Summary

Problems solved by technology

However, the tapered weld cannot be applied to the VPPA welding technology due to technological and equipment reasons.

Images