Electromagnetic heating micro-forming method and apparatus used for non-magnetic workpiece

A micro-forming, non-magnetic technology, applied in induction heating devices, induction heating, induction heating control and other directions, can solve the problems of non-magnetic workpiece heating, heating application range, limitations, etc., to achieve simple structure, low use and maintenance costs , The effect of the control circuit is safe and reliable

Inactive Publication Date: 2011-05-04
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this device is that it cannot heat non-magnetic workpieces, and it cannot heat workpieces that cannot directly conduct heat transfer (such as non-magnetic workpieces in tensile experiments). The application range is limited to a certain extent.

Method used

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  • Electromagnetic heating micro-forming method and apparatus used for non-magnetic workpiece
  • Electromagnetic heating micro-forming method and apparatus used for non-magnetic workpiece
  • Electromagnetic heating micro-forming method and apparatus used for non-magnetic workpiece

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Experimental program
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Effect test

Embodiment Construction

[0020] Combine below figure 1 , figure 2 , image 3 Be specific.

[0021] like figure 1 Shown is the main cross-sectional view of a microplastic forming device for non-magnetic workpieces that cannot be electromagnetically heated by direct heat transfer between objects. The workpiece is a non-magnetic workpiece that cannot be electromagnetically heated through direct heat transfer between objects. The center of the device is a heating cavity with upper and lower through holes, narrow at both ends, and wide in the middle. From the inside to the outside, there are magnetic metal (magnetic core) 4, electric The magnetic induction coil 5, the electromagnetic shielding magnetic block 2, the insulating heat shield 1, and the temperature detection element 3 are arranged on the inner surface of the magnetic core close to the workpiece. When working, the fixture connecting the workpiece will position the workpiece in the middle of the heating cavity through the upper and lower thr...

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PUM

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Abstract

The invention relates to an electromagnetic heating method applied to a nonmagnetic workpiece and a control apparatus thereof. In the method, magnetic metals of an upper through hole and a lower through hole are arranged in an alternating magnetic field produced by an alternating current; magnetic line of force in the magnetic field produces a loop by the magnetic metals and forms a plurality of vortex induction currents; vortex finishes the conversion from electrical energy to heat energy by overcoming the resistance flow of the magnetic metals and ensures that the temperature of the magnetic metals rises fast; the heat of the magnetic metals is transferred to air in a through hole and then is transferred to the nonmagnetic workpiece in the through hole by the air; a temperature detection element which is arranged at the magnetic metals detects the heating temperature and inputs a signal to an electromagnetic heating temperature control apparatus to control the electromagnetic heating temperature. The device for realizing the method consists of the magnetic metals of the upper through hole and the lower through hole, an electromagnetic induction coil, the temperature detection element, a shielding magnetic block, an insulating thermal baffle and the electromagnetic heating temperature control apparatus. The invention has the advantages of simple structure, safe control circuit, etc.

Description

technical field [0001] The invention relates to the field of plastic forming, in particular to an electromagnetic heating method and its control device in the micro-stretching forming process that is non-magnetic and cannot be heated by heat transfer. It is mainly used in the field of micro-plastic forming of ultra-thin plates, and is also suitable for Macro plastic forming field. Using the method and the control device can not only safely and quickly heat tiny workpieces, but also change the heating temperature in time according to the requirements of forming performance, so as to improve the plastic forming performance. Background technique [0002] With the rapid development of MEMS, the market demand for micro-devices is increasing, and at the same time new requirements are put forward for the processing technology and processing quality of micro-devices. With the shrinking of the size of micro-devices, factors such as grain size and body-to-surface area ratio have more...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C35/12H05B6/06H05B6/10
Inventor 陆广华王匀刘赤荣朱永书董培龙袁国定
Owner JIANGSU UNIV
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