Pipe fitting bulging method and device adopting metal coating magnetic collector

A metal coating and magnetic collector technology, which is applied in the field of tube bulging methods and devices, can solve the problems of large skin depth of the magnetic collector, changing the structure of the magnetic collector, and complicated packaging process, so as to avoid product defects and achieve good overall uniformity , the effect of reasonable magnetic field distribution

Pending Publication Date: 2022-08-09
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing research on magnetic collectors has not effectively solved the problems of changing the structure of the magnetic collector, the packaging process is complicated, it is not easy to manufacture, and the skin depth of the magnetic collector is large.

Method used

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  • Pipe fitting bulging method and device adopting metal coating magnetic collector
  • Pipe fitting bulging method and device adopting metal coating magnetic collector
  • Pipe fitting bulging method and device adopting metal coating magnetic collector

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The pipe bulging method of the embodiment controls the distribution of the induced current on the outer surface of the magnetic collector by using metal coatings with different thicknesses during the pipe bulging process, and the thickness of the metal coating is less than the skin depth, so as to reduce the skin effect and increase the Workpiece forming quality and forming efficiency.

[0044] like figure 1 and figure 2 As shown, the magnetic collector 1 includes an insulating ring 101 and a metal coating 102 on the outer surface of the insulating ring. The insulating ring 101 is provided with a slit 103; the cross section of the magnetic collector 1 is an isosceles trapezoid. The metal coating 102 is a copper coating. The angle formed by the slit of the magnetic collector and the center line of the magnetic collector is 1.2°.

[0045] The pipe bulging method includes the following steps:

[0046]Step 1: Calculate the reference value of the skin depth of the magne...

Embodiment 2

[0062] like figure 2 As shown, the metal-coated magnetic collector includes an insulating ring 101 and a metal coating 102 on the outer surface of the insulating ring. The insulating ring 101 is provided with a slit 103; the cross-section of the metal-coated magnetic collector is trapezoidal. The angle formed by the slit 103 of the metal-coated magnetic collector and the center line of the magnetic collector is 0.5°-1.5°.

[0063] The metal-coated magnetic collectors of the embodiments are used in a pipe bulging process.

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Abstract

The invention relates to a pipe fitting bulging method adopting a metal coating magnetic collector. The method comprises the steps that a reference value of the skin depth of the magnetic collector is obtained through calculation; preliminarily determining the overall thickness of the metal coating of the magnetic collector; simulating bulging of the pipe fitting, adjusting the conductivity of the magnetic collector to enable the uniformity of the pipe fitting after bulging to be the best, and recording the optimal conductivity of the magnetic collector; the influence of magnetic field distribution of the magnetic collector on the end effect is simulated and analyzed, the thicknesses of metal coatings at the upper end and the lower end of the magnetic collector are adjusted, and the end effect is minimized; the thicknesses of the metal coatings at different parts of the magnetic collector are simulated and adjusted, so that the whole bulged pipe fitting is uniform; and according to the thicknesses of the metal coatings, obtained through simulation, of the different parts of the magnetic collector, the metal coating magnetic collector is manufactured and used for bulging machining of pipe fittings. According to the invention, the end effect is reduced, so that the overall uniformity of the pipe fitting is better; the metal coatings with different thicknesses at different parts of the magnetic collector are utilized, so that the magnetic field distribution of the pipe fitting area is more reasonable, and the forming quality and the forming efficiency of the pipe fitting are improved.

Description

technical field [0001] The invention belongs to the field of metal workpiece forming control, and in particular relates to a pipe fitting bulging method and device using a metal coating magnetic collector. Background technique [0002] The magnetic concentrator, also known as the magnetic flux concentrator, is one of the main accessories in electromagnetic forming. It has the function of moving the magnetic flux to the gap between the magnetic concentrator and the workpiece. It is widely used in the electromagnetic forming of pipes and plates. . The magnetic collector can change the track distribution by changing the shape of its inner wall, so that the magnetic field in part of the space is strengthened, and the magnetic field in the remaining space is weakened, so as to achieve the purpose of forming different workpieces. [0003] The document "Inductor for forming metals by the pressure of a pulsed magneticfield" is the first to introduce the magnetic collector tooling i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/14G06F30/23G06F119/02
CPCB21D26/14G06F30/23G06F2119/02Y02P10/25
Inventor 邱立何琴罗宝妮刘洪池
Owner CHINA THREE GORGES UNIV
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