A device and method for reducing wrinkling of pipe fittings during compression by using axial electromagnetic tension

An electromagnetic tension, axial technology, applied in the field of metal processing

Active Publication Date: 2020-07-07
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent only realizes the controllability of the axial distribution of the radial force, and has little effect on the compression wrinkling of the pipe

Method used

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  • A device and method for reducing wrinkling of pipe fittings during compression by using axial electromagnetic tension

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Experimental program
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Effect test

Embodiment Construction

[0041] Such as figure 1 As shown, a device that uses axial electromagnetic tension to reduce wrinkling of pipe fittings during compression, including:

[0042] A pulse force coil 7 for providing forming force to the metal pipe 6 to be formed;

[0043] The first annular yoke 3.1 located at the upper end of the metal pipe to be formed 6, the second annular yoke 3.2 located at the lower end of the metal pipe 6 to be formed;

[0044] The cross section of the first and second ring yokes is a rectangular frame with a gap, the gap of the first ring yoke 3.1 is set in the middle of the lower side of the rectangular frame, and the gap of the second ring yoke 3.2 is set in the rectangular frame The upper middle part of the type; the first and second annular yokes are used to form a constant magnetic field magnetic circuit;

[0045] The cavity of the first annular yoke 3.1 is provided with a first constant magnetic field coil 1.1, and the cavity of the second annular yoke 3.2 is provid...

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Abstract

The invention provides a device and method for reducing wrinkles during compression of a pipe fitting by using an axial electromagnetic pulling force. The device comprises a pulse force coil, a firstring type magnet yoke and a second ring type magnet yoke, wherein the pulse force coil is used for providing a forming force to the metal pipe fitting to be formed; the first ring type magnet yoke andthe second ring type magnet yoke are located at the upper end and lower end of the metal pipe fitting to be formed; the cross sections of the first ring type magnet yoke and the second ring type magnet yoke are respectively in the shape of a rectangular frame with a gap; constant magnetic field coils are arranged in cavities of the ring type magnet yokes and are used for generating radial constant magnetic fields at the ends of the metal pipe fitting to be formed; pulsed magnetic field coils are arranged in the cavities of the ring type magnet yokes and are used for generating induced eddy currents at the ends of the metal pipe fitting to be formed; an axial through groove is formed in each pulsed magnetic field coil; and the positions of the through grooves correspond to the gaps of thering type magnet yokes. The device and method for reducing wrinkles during compression of the pipe fitting by using the axial electromagnetic pulling force can reduce the axial flowing of materials byusing the axial electromagnetic pulling force in the compression of the pipe fitting, and can effectively suppress the wrinkles of the pipe fitting.

Description

technical field [0001] The invention belongs to the field of metal processing, and particularly relates to a device and method for reducing wrinkling of pipe fittings during compression by using axial electromagnetic tension, mainly used for suppressing the wrinkling phenomenon of metal pipe fittings during compression. Background technique [0002] Metal pipe fittings have been widely adopted in transportation, aerospace and other technical fields due to their advantages of light weight, toughness and high precision. The industrial fields of various countries have invested a lot of money in research and development of related forming technologies. However, due to the wrinkling and instability of metal pipe fittings during compression, their application and manufacture in the engineering field are largely restricted. [0003] The literature "Theoretical and Experimental Research on the Forming of Metal Thin-walled Pipe Fittings by Outer Compression Diameter (Journal of Nonfe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/14
CPCB21D26/14
Inventor 邱立张龙高浚杰常鹏熊奇邓长征曹成江进波陈龙
Owner CHINA THREE GORGES UNIV
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