Thin walled cylinder girth laser welding tong

Abstract

The invention discloses a circular seam laser welding fixture for a thin-wall cylinder, which comprises a head frame, an extended ring, a rear frame of a machine tool and a top plate. When in operation, the extended ring is placed between the head frame and the rear frame of the machine tool and sleeved in a place where two workpieces to be welded are spliced; one non-splicing end of the workpiece is retained and positioned on a spindle of the head frame while the other non-splicing end is attached to a positioning surface of a baffle; a top point of the rear frame of the machine tool is arranged in a top point hole of the baffle. By adopting a retractable extended ring, the invention realizes the correct splicing and retaining of the thin-wall cylinder; the gyration of the cylinder can be realized by a way that the head frame with the function of turning drives a head part of the cylinder and a tail part of the cylinder is supported by the rear frame and the top plate; meanwhile, the splicing precision also meets the requirement of the laser welding. A worm-and-gear mechanism of the spindle in the head frame can accomplish the precise gyration of the workpiece and the head frame with a turnover function is convenience for feeding and discharging of a longer workpiece. The invention has the advantages of precise positioning, reliable and convenient fixture, convenient application, high efficiency, etc.

Description

technical field [0001] The invention relates to a laser welding jig, in particular to a laser welding jig for a thin-walled cylindrical circular seam. Background technique [0002] In petrochemical, aerospace and military fields, long thin-walled cylindrical parts such as pipelines and missile shells are often welded by multiple short thin-walled cylinders. Laser welding is an efficient welding technology with high precision, fast welding speed, small deformation and less thermal damage to materials. For the welding of the girth welding of the deformable thin-walled cylinder, especially when the material is heat-sensitive metal materials such as aluminum alloy and titanium alloy sheet, laser welding is the best choice. However, laser welding requires high seam accuracy of the workpiece to be welded. Generally speaking, the seam error cannot exceed 1 / 10 of the plate thickness. The existing welding fixtures for thin-walled cylindrical welds are usually aimed at welding metho...

AI Technical Summary

Problems solved by technology

None of the above-mentioned welding fixtures can complete the accurate splicing and clamping of the two thin-walled cylinders to be welded, and the rotation accuracy of the cylinders is also low, which cannot meet the laser welding requirements of the thin-walled cylinder welds

In addition, the above methods have not considered the problem of loading and unloading of longer cylinders

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