Supercharge Your Innovation With Domain-Expert AI Agents!

A device and method for eliminating residual stress of workpiece by using pulsed electromagnetic force

A residual stress and pulsed electromagnetic technology, applied in the field of metal manufacturing, can solve the problems of difficult precise control, small action range, low efficiency, etc., and achieve the effects of reducing residual stress, uniform force, and easy control

Active Publication Date: 2022-06-07
HUAZHONG UNIV OF SCI & TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the defects of the prior art, the object of the present invention is to provide a device and method for eliminating the residual stress of the workpiece by using pulsed electromagnetic force, aiming to solve the problems of low efficiency, difficulty in precise control, too small range of action and The problem of uneven processing area

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A device and method for eliminating residual stress of workpiece by using pulsed electromagnetic force
  • A device and method for eliminating residual stress of workpiece by using pulsed electromagnetic force
  • A device and method for eliminating residual stress of workpiece by using pulsed electromagnetic force

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0059] figure 1 The first embodiment of the device for eliminating the residual stress of the workpiece provided by the present invention, figure 2 It is a top view of this embodiment. The device includes: bulging coil 1, coil bobbin 2, support frame 8, pulse power supply system, magnetic collector 5, upper and lower end plates 6, fixed screw 7, support frame 8, driving workpiece 10, limit ring 11, sliding groove 12 , Steel support sleeve 13.

[0060] The metal workpiece 3 to be processed is wrapped around the bulging coil 1, and is discharged to the bulging coil through the pulse power supply system, and a large pulse current is passed through the coil, and a pulsed strong magnetic field is generated in the surrounding space, and then a pulsed strong magnetic field is induced in the metal workpiece to be processed. Eddy current, the interaction between eddy current and the strong magnetic field in space will generate a strong outward repulsive force, and the magnetic colle...

no. 2 example

[0068] Image 6 It is the second embodiment of the device for eliminating residual stress of the workpiece provided by the present invention. The device includes: a bulging coil 1 , a coil bobbin 2 , and a magnetic collector 5 .

[0069] The pulse power supply discharges to the bulging coil 1, and a large pulse current is passed through the coil, and a pulse strong magnetic field is generated in the surrounding space, thereby inducing eddy currents in the metal workpiece to be processed. The difference from the first embodiment is that the metal workpiece in this embodiment has an irregular shape. Therefore, the shape of the outer surface of the magnetic collector 5 is designed to be consistent with the shape of the inner surface of the metal workpiece, because the magnetic collector can make the magnetic field line along it. The surface distribution of the coil can make the magnetic field generated by the coil evenly distributed in the metal workpiece, and the interaction bet...

no. 3 example

[0073] Figure 7 It is a third embodiment of the device for eliminating residual stress of a workpiece provided by the present invention. The device includes: a bulging coil 1 , a coil bobbin 2 , and a telescopic rod 9 .

[0074] The device is suitable for processing large metal workpieces. Using a distributed coil structure, multiple coils 1 are arranged inside the metal workpiece 3 to be processed, and each coil is discharged through a pulse power supply to generate a pulsed strong magnetic field in space. , and then induce eddy currents in the metal workpiece to be processed, and the interaction with the magnetic field will generate a strong Lorentz force, which superimposes with its original residual stress to generate plastic strain and release the residual stress.

[0075] Due to the method of arranging the array coils, the production cost and use risk of a single large coil are reduced, and the strength requirements and volume of each coil are greatly reduced. Ability ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a device and method for eliminating the residual stress of a workpiece by using pulse electromagnetic force. The device includes a metal workpiece to be processed, a pulse magnet, a pulse power supply, etc., and belongs to the field of advanced manufacturing. This method discharges the pulse magnet through a pulse power supply. After the magnet is fed with a huge pulse current, it will generate a strong pulse magnetic field, induce eddy currents in the metal workpiece, and then generate a strong electromagnetic force. The original residual stress inside the metal workpiece and The superposition of the external electromagnetic force produces plastic deformation, and the residual stress is released. In addition to the oscillation and thermal effects during the discharge process, when the external electromagnetic force disappears, the residual stress inside the workpiece can be greatly reduced, so as to eliminate and control the residual stress. The effect of stress.

Description

technical field [0001] The invention belongs to the field of metal manufacturing, and more particularly, relates to a device and method for eliminating residual stress of a workpiece by utilizing pulsed electromagnetic force. Background technique [0002] Residual stress widely exists in all kinds of metal components. Due to factors such as uneven plastic deformation, thermal action process and chemical change during processing, residual stress will inevitably be generated, which will affect the mechanical strength, service life and structure of metal components. stability, etc. The traditional methods of eliminating and regulating residual stress mainly include aging method and mechanical method. The aging method includes: natural aging, heat treatment aging, vibration aging, etc. These methods often take too long and are accompanied by the increase of workpiece temperature. , resulting in material softening and strength reduction; mechanical methods include: mechanical st...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/04C21D11/00
CPCC21D1/04C21D11/00Y02P10/20
Inventor 李亮唐英豪李潇翔刘海祥曹全梁赖智鹏韩小涛
Owner HUAZHONG UNIV OF SCI & TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com