A seamless tension welding fixture for welding the girth weld of thin-walled cylinder

Abstract

The invention discloses a seamless tensioning welding jig used for welding circumferential welds of a thin-wall barrel. The seamless tensioning welding jig comprises a positioning disc and a tensioning mechanism mounted at the center of the positioning disc, master tensioning blocks and slave tensioning blocks which are staggered are uniformly disposed on the positioning disc uniformly along the circumferential direction and located on the outer side of the tensioning mechanism, a guide block is arranged on each of the master tensioning blocks and the slave tensioning blocks, an air nozzle is arranged on each of the master tensioning blocks and the slave tensioning blocks, the positioning disc is circumferentially provided with radial stretched springs which connect the master tensioning blocks with the slave tensioning blocks, one end, close to the center of the positioning disc, of each of the master tensioning blocks and the slave tensioning blocks is provided with a circumferential stretched spring, and an air nozzle gasket is arranged at the joint of each air nozzle and each of the master tensioning blocks and the slave tensioning blocks. By the seamless tensioning mechanism, the master tensioning blocks and the slave tensioning blocks form a closed annular ring under the tensioning state, and the circumferential weld of one workpiece is tensioned effectively; meanwhile, a closed annular argon groove is formed in the back of the weld, so that the weld is protected adequately, and welding quality is improved.

Description

technical field [0001] The invention belongs to the technical field of aviation and aerospace, and relates to a fixture, in particular to a seamless tension welding fixture for welding the girth weld of a thin-walled cylinder. Background technique [0002] In the field of aviation and aerospace, parts such as the afterburner cylinder, the outer wall of the combustion chamber, and the casing are often welded by several sections of thin-walled cylinders or welded by thin-walled cylinders and installation edges. Thin-walled cylinder girth weld welding is an important process in the manufacture of such parts. However, the current welding method for thin-walled annular cylindrical parts is usually to use a tire with a shape similar to the inner surface of the workpiece to support the circumferential welding of the two workpieces, first to fix the workpieces by spot welding, and then to carry out argon arc along the circumferential direction. weld. When using this method for wel...

AI Technical Summary

Problems solved by technology

When using this method for welding, in order to realize the loading and unloading of parts, the size of the tire is usually smaller than the size of the workpiece, so there is often a large seam assembly gap at the welding place, resulting in unstable welding process and concave weld seam. In addition, this With this method, the back of the weld cannot be fully protected by argon gas, and the welding quality is poor, which makes it difficult to meet product quality requirements

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