Thin-walled cylinder girth welding device

Abstract

The invention discloses a thin-walled cylinder girth welding device. The device comprises an arc welding machine, a grinding machine, an inner supporting tooling and an inner supporting lifting device. The arc welding machine and the grinding machine are arranged on the left and right sides of the inner supporting tooling correspondingly. The inner supporting tooling comprises a bottom platform, asupporting frame I and a plurality of supporting plates I uniformly distributed in the circumferential direction of the supporting frame I. The supporting plates I are connected with drivers I arranged on the supporting frame I and move synchronously in the radial direction under the effect of the drivers I, and one side surfaces of the supporting plates I are tightly attached to the inner wall surface of a cylinder section. The supporting frame I is arranged on a vertical lifting mechanism. The inner supporting lifting device comprises a supporting frame II and a plurality of supporting plates II uniformly distributed in the circumferential direction of the supporting frame II. The supporting plates II are connected with drivers II arranged on the supporting frame II and move synchronously in the radial direction under the effect of the drivers II, and one side surfaces of the supporting plates II are tightly attached to the inner wall surface of the cylinder section. By means of thethin-walled cylinder girth welding device, influences of the gravity factor on welding deformation can be eliminated, girth welding station automation can be achieved easily, and the assembling quality and efficiency are improved.

Description

technical field [0001] The invention relates to a girth welding device, in particular to a thin-walled cylindrical girth welding device. Background technique [0002] Pressure vessel is a comprehensive product involving multiple industries and interdisciplinary fields. It is widely used in food, chemical, petroleum, metallurgy, aviation, aerospace and many other industries. With the gradual development of pressure vessel equipment towards larger diameters and thinner walls, how to manufacture non-standard pressure vessels efficiently and with high quality has become an urgent problem to be solved. The welding of two groups of paired girth seams of large-diameter thin-walled cylinders is an extremely important part in the manufacture of non-standard pressure vessels. This is because when the relative rigidity of the cylinder is low, the centering of the circular seam welding is poor and the amount of misalignment is large, and the required welding quality cannot be guarantee...

AI Technical Summary

Problems solved by technology

However, because the wall thickness is too thin and the diameter of the cylinder is large, the influence of the cylinder’s own weight deformation cannot be completely eliminated by only relying on the round tooling, and the positioning accuracy of the cylinders during horizontal assembly is often not guaranteed, which leads to the failure of the cylinder during welding. Uneven force in all directions, misalignment and deformation are difficult to control

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