Rolling method for circular tube

Abstract

A rolling method for a circular tube comprises the following steps that a steel plate needing to be rolled is cut into a rectangular shape; the rectangular steel plate is placed in a roller machine for rolling; the rolled steel plate is detached from the roller machine; a connector of the rolled steel plate is welded to form a semi-finished circular tube; a defect detecting test is performed on welding seams of the connector of the semi-finished circular tube; the semi-finished circular tube is placed back to the roller machine for repeated rolling; the semi-finished circular tube rotates circularly on the roller machine, and pressure on the semi-finished circular tube is gradually increased; the fished circular tube is detached. According to the rolling method for the circular tube, head pressing is not required, curving is directly performed, and the circular tube is placed back to the roller machine for repeated rolling after a longitudinal joint of the circular tube is welded; pressure head materials do not need to be welded any longer; after head pressing, the pressure head materials are cut off and then the curving is performed. In this way, the rolling process is simpler, working procedures are more reasonable, the rolling accuracy of the circular tube is enhanced, the working efficiency for manufacturing is improved, materials and labor force are saved, and production efficiency for the circular tube is guaranteed.

Description

technical field [0001] The invention relates to a method for manufacturing a round pipe, in particular to a method for rolling a round pipe. Background technique [0002] In the process of making rolled tubes, there are usually two methods: one is to use the indenter tire to indent the head, and then bend the element. This rolling method is for thin plate rolled tubes, and the rolled round tubes are rolled There is a straight section within 100mm of the edge, which cannot guarantee the manufacturing accuracy of the round pipe; one is to weld the indenter material at both ends of the steel plate to be rolled, and then press the head, and then cut off the indenter material and then bend it. Although this rolling method can ensure the manufacturing accuracy of the round pipe, it has too many processes and consumes a large amount of indenter material, which is time-consuming and labor-intensive. Contents of the invention [0003] Aiming at the deficiencies in the above-mentio...

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Problems solved by technology

[0002] In the process of making rolled tubes, there are usually two methods: one is to use the indenter tire to indent the head, and then bend the element. This rolling method is for thin plate rolled tubes, and the rolled round tubes are rolled There is a straight section within 100mm of the edge, which cannot guarantee the manufacturing accuracy of the round pipe; one is to weld the indenter material at both ends of the steel plate to be rolled, and then indent the head, and then cut off the indenter material and then bend it. Although this rolling method can ensure the manufacturing accuracy of the round pipe, it has too many processes and consumes a lot of pressure head material, which is time-consuming and labor-intensive.

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