Bending method of pipes with flexible chained-ball mandrel

Abstract

The invention relates to a pipe bending method, in particular to a bending method of pipes with a flexible chained-ball mandrel and solves the problem that high bending degree in the existing process of bending pipes having a mandrel causes mutual interference. The method includes: 1, threading a plurality of balls with a rope having a restraint ring at one end; 2, inserting a combined flexible chained-ball mandrel into a pipe to be bent; 3, placing a first rubber plug into one end of the pipe to be bent, fastening the first rubber plug through a first fastener, placing a second rubber plug into the other end of the pipe to be bent, and fastening the second rubber plug through a second fastener; 4, placing the pipe to be bent, onto a female die, and driving a male die to move down by a press until the pipe to be bent is bent; 5, after bending, loosening the first fastener, the second fastener, the first rubber plug and the second rubber plug to obtain a bent pipe. The bending method of pipes with one flexible chained-ball mandrel is applicable to pipe bending.

Description

technical field [0001] The invention relates to a pipe bending forming method, in particular to a pipe bending forming method of a flexible hammer type mandrel. Background technique [0002] In order to comply with the development requirements of the era of energy saving and emission reduction, lightweight has gradually become one of the key factors considered in the process of modern structural design. In addition to the use of lightweight materials, another ideal way to reduce weight is to "replace solids with empty space" or use variable cross-section and other strength structures, that is, for components that are mainly subjected to bending or torsional loads, the use of hollow structures can achieve weight reduction , The purpose of saving materials, but also can make full use of the actual effects of material strength and stiffness. [0003] The process of manufacturing hollow components by plastic processing method with pipe as the initial blank is called pipe plasti...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems that the bending degree of the existing pipe with mandrel is too large to interfere with each other, and the friction between the mandrel and the inner wall of the pipe is too large to cause excessive thinning of the wall thickness, the present invention proposes a flexible Pipe Bending Forming Method of Hammer Mandrel

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