A tool for automatic welding of thick-walled hollow rods

Abstract

A tool for automatically welding a thick-wall hollow rod uses a positioning device for realize self positioning of a welding surface and uses a compensating device for compensating length dimension tolerance of a workpiece, so that a welding seam is always as high as a centerline of a welding gun and frequent adjustment of the position of the welding gun is avoided. The tool comprises an upper supporting plate, a lower supporting plate, upright posts, a servo motor and a three-jaw chuck, wherein a positioning plate assembly is installed at the middle part of the upright post on one side; the positioning plate assembly can rotate around the upright post; a welding gun assembly is installed on the inner side of the upright post on the other side; the positioning plate assembly is as high as the welding gun assembly; the height of the positioning plate assembly is adjusted by a limiting nut on the upright post; the height of a long hollow rod is adjusted by a compensating mechanism, so that the upper end surface of the long hollow rod contacts the lower surface of the positioning plate assembly; a short hollow rod is connected with the upright posts at the two ends through positioning and adjusting mechanisms; the height of the short hollow rod is adjusted, so that the lower end surface of the short hollow rod always clings to the upper end surface of the long hollow rod and the welding seam is as high as the centerline of the welding gun.

Description

technical field [0001] The invention creates a tooling for automatic self-fluxing welding of thick-walled (4mm) hollow rods without adding wire. Through the self-positioning of the welding surface and the compensation of the axial dimension, the position of the weld seam is kept unchanged, and the position of the weld seam is guaranteed to be free from damage. Influence of weldment length dimensional tolerance. Background technique [0002] On the basis of ensuring the welding quality, in order to improve the automation of hollow rod welding and improve work efficiency, the center line of the welding torch is required to be at the same height as the weld seam. Therefore, the axial position of the hollow rod weldment needs to be determined by the weld seam. However, due to the length and dimensional tolerances of the two hollow rods, the welding tool needs to have the ability to compensate for the length and dimensional tolerances of the hollow rods in addition to the functio...

AI Technical Summary

Problems solved by technology

However, due to the length and dimensional tolerances of the two sections of hollow rods, it is necessary for the welding tool to have the ability to compensate for the length and dimensional tolerances of the hollow rods in addition to the functions of positioning, clamping, and driving the hollow rods to rotate.

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