Large-scale spherical shell circular seam welding fixing fixture and method of using its circular seam welding

Abstract

The invention provides a girth welding fixing clamp for a large spherical shell; the fixing clamp comprises anti-deformation rings (1), a fixing disk (2) fixedly connected with the anti-deformation rings (1), a supporting base (3) for supporting a spherical shell and a connecting piece (4), wherein the anti-deformation rings (1) are arranged at both ends of the spherical shell, and the fixing disk (2) is fixedly arrange on the anti-deformation rings (1); the spherical shell is placed on the supporting base (3) and the connecting piece (4) through a supporting rod (21) on the fixing disk (2), and the connecting piece (4) is welded with the spherical shell, thus the supporting base (3) and the connecting piece (4) can commonly support the spherical shell; when a weld seam of the spherical shell is welded, a welder head can automatically align the welding position before welding, and two weld seams on the same one longitudinal coils can be welded by rotating the shell body once; the working efficiency is improved.

Description

technical field [0001] The invention relates to a welding fixing jig, in particular to a fixing jig for automatic welding of a large spherical shell circular seam. Background technique [0002] Large spherical shells are usually spliced ​​by multiple melons, and the welding quality of the spliced ​​welds has become a key factor affecting the quality of the entire product. For conventional pressure vessels, the tailor welding of large spherical shells generally adopts manual welding. Manual welding requires less equipment, tools and fixtures, is less affected by external factors, and is more convenient to operate. Therefore, manual welding is more common in tailor welding of large spherical shells. But its shortcomings are also obvious, that is, the welding quality depends to a large extent on the welder's personal welding level, which brings greater instability to the product quality. For nuclear power main equipment, the detection means and requirements for the quality of...

AI Technical Summary

Problems solved by technology

But its shortcomings are also obvious, that is, the welding quality depends to a large extent on the welder's personal welding level, which brings great instability to the product quality.

For nuclear power main equipment, the detection means and requirements for the quality of welds are higher than those of conventional pressure vessels. In many cases, the welds are required to be qualified at one time. Welding has a greater quality risk

Moreover, the manual welding time is longer and the labor intensity is higher, which slows down the product manufacturing progress to a certain extent and increases the probability of quality problems.

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