Manufacture method for inner composite pipe

Abstract

The invention relates to a manufacture method for an inner composite pipe, which comprises the following steps that: firstly, the pipe wall of an inner pipe is processed to deform through a mechanical tool, in addition, the outer diameter of the inner pipe is reduced, then, the inner pipe is placed into a base pipe, next, the hydraulic pressure or mechanical pressure is exerted to the inner wall of the inner pipe from a pipe cavity of the inner pipe, the inner pipe is unfolded into a cylindrical pipe shape, and the mechanical pressure is transmitted onto the inner wall of the inner pipe by a steel ball. The outer diameter of the inner pipe before the diameter reduction and the outer diameter of the inner pipe after being unfolded are identical to the inner diameter of the base pipe. The inner pipe is placed into the base pipe after the deformation and diameter reduction, and corrugations of the pipe wall of the inner pipe are leveled through the mechanical pressure and the hydraulic pressure inside the inner pipe, so the base pipe is tightly matched with the inner pipe, the inner pipe is tightly combined with the base pipe through the tension of the inner pipe after the leveling and deformation, and the falling and the gap occurrence are avoided. The method has the advantages that the operation is simple, and the technical effect is reliable.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a composite pipe fitting, in particular to a method for manufacturing an inner composite pipe. Background technique [0002] Composite pipe fittings are widely used in industrial fields. In the prior art, there is likely to be a slight gap between the base pipe and the inner pipe constituting the composite pipe, which affects the quality of the pipe. Contents of the invention [0003] The purpose of the present invention is to provide a method for manufacturing an inner composite pipe. The method for manufacturing an inner composite pipe should solve the technical problem in the prior art that there is a slight gap between the base pipe and the inner pipe constituting the composite pipe. . [0004] The manufacturing method of the inner composite pipe of the present invention includes a process of combining the inner pipe with the base pipe, wherein, in the process of combining the inne...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for manufacturing an inner composite pipe. The method for manufacturing an inner composite pipe should solve the technical problem in the prior art that there is a slight gap between the base pipe and the inner pipe constituting the composite pipe.

Images