Thin-wall cylinder welding assembly circle expanding device

Abstract

The invention belongs to the technical field of electron beam welding, and particularly discloses a thin-wall cylinder welding assembly circle expanding device. The device comprises a mandrel, the two ends of the mandrel are connected with a first workpiece shaft and a second workpiece shaft, expansion devices are installed on the workpiece shafts, and a fixed end cover is arranged between the expansion device on the first workpiece shaft and a first expansion nut. A second expansion nut is arranged between the expansion device on the second workpiece shaft and a clamping end cover; and a first expansion section connecting disc and a second expansion section connecting disc in each expansion device are respectively connected with expansion sections on a fixed mounting disc and a movable mounting disc through connecting rods. The expansion devices are arranged, contraction and circle expansion of the circle expanding device are achieved by pushing expansion nuts, and due to the fact that the expansion devices are internally connected to the joint of weld joints of a multiple-section barrel, the diameter tolerance of each weld joint has self-adaptability so as to compensate for the errors of a cylinder.

Description

technical field [0001] The application belongs to the technical field of electron beam welding, and in particular relates to a rounding device for welding and assembling a thin-walled cylinder. Background technique [0002] Thin-walled parts have the characteristics of light weight, material saving, and compact structure. When thin-walled cylinders are made of thin plates, the diameter of the inner cavity of the cylinder is large, the diameter of the mouth is small, and the multi-section cylinders are spliced ​​and welded to bulge. The tooling has the following problems: The thin-walled cylinder has poor rigidity and is easy to deform. At the weld joints of multi-section cylinders, the local misalignment is difficult to control, and it is prone to the phenomenon that the local misalignment is out of tolerance, and the phenomenon of welding unqualified technical requirements is likely to occur; [0003] Therefore, a tensioning device should be provided that can realize the ex...

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Problems solved by technology

[0002] Thin-walled parts have the characteristics of light weight, material saving, and compact structure. When thin-walled cylinders are made of thin plates, the diameter of the inner cavity of the cylinder is large, the diameter of the mouth is small, and the multi-section cylinders are spliced ​​and welded to bulge. The tooling has the following problems: The thin-walled cylinder has poor rigidity and is easy to deform. At the weld joints of multi-section cylinders, the local misalignment is difficult to control, and it is prone to the phenomenon that the local misalignment is out of tolerance, and the phenomenon of welding unqualified technical requirements is likely to occur;

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