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Pipe fitting forming method and device for improving magnetic field distribution of trapezoidal magnetic collector through convex pieces

A technology of magnetic field distribution and magnetic collector, which is applied in the field of electromagnetic forming control of pipe fittings, can solve problems such as uneven distribution of electromagnetic force, reduction of circumferential uniformity of electromagnetic forming, and weak electromagnetic force, so as to facilitate large-scale promotion and use and improve electromagnetic field distribution Unbalanced, easy-to-produce effects

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

However, due to the structural problems of the slits of the magnetic collector itself, there is a problem that the electromagnetic force is unevenly distributed in the circumferential direction of the workpiece. The closer to the slit, the weaker the electromagnetic force
When the existing magnetic collector is used for tube bulging, compression electromagnetic forming or electromagnetic welding, it is difficult to achieve the ideal forming effect near the slit, and this structural defect reduces the circumferential uniformity of electromagnetic forming

Method used

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  • Pipe fitting forming method and device for improving magnetic field distribution of trapezoidal magnetic collector through convex pieces
  • Pipe fitting forming method and device for improving magnetic field distribution of trapezoidal magnetic collector through convex pieces
  • Pipe fitting forming method and device for improving magnetic field distribution of trapezoidal magnetic collector through convex pieces

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Experimental program
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Effect test

Embodiment 1

[0034] image 3 It is a magnetic collector of the existing technology. The magnetic device is a trapezoidal ring, and there is a very narrow seam with a ring; the height of the outer wall of the ring is far greater than the height of the inner wall. The capacitor power supply is powered on the driving coil to generate counter -timing pipe current. According to the law of electromagnetic induction, the inner wall of the magnetic device will generate a clockwise sensing current; at the same time, due to the gap in the magnetic collector, the induction current cannot form a closed loop on the inner wall; therefore, the inductive current encounters encounters When the gap is the gap, it will flow along the gap to the outer wall of the magnetic device, and form a reverse -clockic induction current on its outer wall. The induction current of the inner wall of the magnetic device is used as the source of incentives for the workpiece, and the induction current is generated within the work...

Embodiment 2

[0050] The pipe forming method of the embodiment is the same as the embodiment.

[0051] The number of cashmers of the trapezoidal magnetic 2 2.2 of the embodiment of the embodiment is 2 pairs, the angle of the adjacent convex tablet 2.2 is 120 °, and the angle of the disconnected seam 2.1 and the adjacent bulk 2.2 is 120 °, such as 120 °, such as Figure 5A As well as 5b Show.

Embodiment 3

[0053] The pipe forming method of the embodiment is the same as the embodiment.

[0054] The number of convex 2.2 of the trapezoidal magnetic 2 2.2 of the embodiment is 1 pair, and the angle of the convex tablet 2.2 and the broken seam 2.1 is 180 °, such as Figure 6A As well as 6b Show.

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Abstract

The invention relates to a pipe fitting forming method for improving magnetic field distribution of a trapezoidal magnetic collector by adopting a lug, which comprises the following steps of: determining the longitudinal height of the lug of the magnetic collector according to the length of a pipe fitting to be formed; finite element software is used for establishing a workpiece electromagnetic forming model comprising a trapezoidal magnetic collector, a driving coil and a to-be-formed pipe fitting; pulse current is applied to a driving coil of the workpiece electromagnetic forming model, and magnetic field distribution of the trapezoidal magnetic collector is obtained through simulation; adjusting the number and the thickness of lugs of the trapezoidal magnetic collector in the workpiece electromagnetic forming model to enable the magnetic field distribution of the simulated trapezoidal magnetic collector to be close to rotational symmetry; manufacturing a multi-lug trapezoidal magnetic collector according to the obtained parameters of the trapezoidal magnetic collector; and performing compression forming control on the to-be-formed pipe fitting by using the multi-lug trapezoidal magnetic collector. The phenomenon that electromagnetic field distribution on the inner side of the magnetic collector is unbalanced due to breaking joints is improved, so that the magnetic field distribution on the inner side of the annular magnetic collector is more approximate to rotational symmetry, and the uniformity of pipe fitting forming is improved.

Description

Technical field [0001] The present invention is the field of electromagnetic forming control in the pipeline, which specifically involves a method and device that uses the tube forming method and device that uses the mortar magnetic field distribution with a convex piece. Background technique [0002] Lightweight is an important technical means to achieve energy conservation and emission reduction in the fields of aerospace and automobile industry. The main way to achieve lightweight is the use of light alloy materials. High -performance aluminum alloy, titanium alloy, and magnesium alloy have become the preferred materials for modern aerospace and automotive industry to achieve lightweight. However, light alloy materials have low forming and plasticity at room temperature, poor local pull -ups, prone to cracks, large rebounds, and it is not satisfactory to use traditional processing processes for processing. [0003] Electromagnetic forming is a high -speed pulse forming technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/14
CPCB21D26/14
Inventor 邱立汪晨鑫尹朋磊邵子豪姜晨非李玉田吴伟业何琴刘洪池罗宝妮
Owner CHINA THREE GORGES UNIV
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