Rolling press device of composite tube

Abstract

The invention discloses a rolling press device of a composite tube. The rolling press device comprises a pull rod, a rolling wheel and a plurality of rolling pins, the pull rod can move along the inner wall of a liner tube of the composite tube under the action of external force, the rolling wheel is arranged on the pull rod and can rotate relative to the pull rod, the rolling pins are fixed to the outer side of the rolling wheel, an angle exists between the axis of each rolling pin and the axis of the pull rod, component force along the outer tangent plane of the rolling wheel is generated between the rolling pins and the inner wall of the liner tube of the composite tube when the pull rod moves along the inner wall of the liner tube of the composite tube, and the rolling wheel is driven to rotate around the pull rod. The rolling press device of the composite steel tube rotates by depending on friction force of the inclined rolling pins and the inner wall of the liner steel tube, the quality of the composite steel tube can be improved, the problem that the pull rod is easy to break in the rotating process is solved, production efficiency is improved, and the manufacturing cost of the composite steel tube is lowered.

Description

technical field [0001] The invention relates to steel pipe composite equipment, in particular to a rolling device for composite pipes in steel pipe production. Background technique [0002] In the production of steel pipes, in order to reduce costs, it is necessary to insert a thin steel pipe made of stainless steel into the steel pipe body of ordinary carbon steel, and use it as a fluid delivery pipe to achieve the purpose of rust prevention. The inner wall of the lined steel pipe must be rolled so that the diameter of the thin stainless steel pipe expands and undergoes plastic deformation, so as to cling to the outer parent steel pipe to achieve the purpose of integration. [0003] The current rolling method of the composite steel pipe composed of the inner steel pipe and the parent steel pipe is to use a roller that is slightly larger than the inner diameter of the inner steel pipe and will not cause plastic deformation of the parent steel pipe to enter the inner steel pi...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a composite pipe rolling device to solve the problem that the pull rod of the existing composite pipe rolling device is easily twisted during rotation, resulting in reduced production efficiency and increased production cost

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