Complex tubular component flexible forming device and method based on magnetorheological elastomer

A magnetorheological elastomer and flexible forming technology, which is applied in the field of high-pressure bulging of pipes, can solve the problems of poor sealing effect of liquid media, difficult local pressure control, and complicated equipment, so as to achieve less environmental pollution, avoid easy cracking, and improve wall thickness. The effect of thickness uniformity

Inactive Publication Date: 2019-12-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The technical problem mainly solved by the present invention: In view of the disadvantages that the pressure is not easy to be locally regulated under the action of a single force field in the hydroforming process of the existing comple...

Method used

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  • Complex tubular component flexible forming device and method based on magnetorheological elastomer
  • Complex tubular component flexible forming device and method based on magnetorheological elastomer
  • Complex tubular component flexible forming device and method based on magnetorheological elastomer

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Embodiment 1

[0036] The flexible forming method of a complex component based on magnetorheological elastomer of the present invention includes the following steps:

[0037] First, place the tube blank to be formed between the lower surface of the upper mold and the upper surface of the lower mold, and clamp the tube blank to be formed; the selected magnetorheological elastomer uses polyurethane rubber as the matrix and carbonyl iron powder as the magnetic particles , Put the two sections of the magnetorheological elastomer into the tube blank from both ends of the tube blank. The magnetorheological elastomer should fill the tube blank. Insert the left and right punches into the upper and lower molds from both sides, and Not in contact with the tube blank, such as figure 1 ;

[0038] Secondly, determine the required magnetic induction intensity B according to the material of the tube to be formed and the elastic modulus of the magnetorheological elastomer required in the forming stage. The magne...

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Abstract

The invention discloses a complex tubular component flexible forming device and method based on a magnetorheological elastomer. The device comprises an upper mould body (1), a lower mould body (2), electromagnetic coils (3), a left punch (4), a right punch (5), an initial tube blank (6) and the magnetorheological elastomer (7). Under the effect of an external magnetic field, the elasticity modulusof different portions of the magnetorheological elastomer changes differently, so that the to-be-formed tube blank is formed in a required shape under the proper elasticity modulus of the magnetorheological elastomer. According to the complex tubular component flexible forming device and method, by means of changing of the elasticity modulus of the magnetorheological elastomer under different magnetic field conditions, the problems that sealing is difficult in the high-pressure forming process of existing complex components, and thin-walled components are prone to cracking in the forming process are solved. The magnetorheological effect of the magnetorheological elastomer is fully achieved, in addition, the equipment is simple, and the production efficiency is high.

Description

Technical field [0001] The invention belongs to the technical field of pipe high-pressure bulging, and in particular relates to a device and method for flexible forming of complex components based on magnetorheological elastomers. Background technique [0002] The pipe fittings of multiple material systems are mainly used to manufacture aviation and aerospace equipment piping systems. Among them, for easily deformable materials, internal high pressure bulging is usually used. The principle is to rely on the plastic forming ability of the material to expand the tube in the radial direction to the cavity of the mold under the internal pressure of the tube. The force transmission medium inside the blank has an important influence on the bulging process. At present, the most widely used is internal high pressure liquid filling forming, but this method mainly has the following disadvantages: [0003] (1) The hydraulic bulging technology requires a huge hydraulic system, complex proces...

Claims

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Application Information

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IPC IPC(8): B21D26/14
CPCB21D26/14
Inventor 郭训忠王辉杨秋成
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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