Presentation 2019-05-17
Proposal of High Speed Mechanical Switch for Commutation of Discharge Current in Magnetic Pulse Welding of Sheet Metals
Tomokatsu Aizawa,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) In this report, magnetic pulse welding is done by rapidly flowing a large discharge current from a capacitor bank to an insulated 5-turn flat coil. The overlapped welding sheet metals with a gap are fixed on the coil, and high density magnetic flux is applied to them. Both sheets collide and are welded at high speed. The current is set to be nearly peak when the welding sheets collide. Two other sheet metals for mechanical switch contacts are also placed on the coil and connected to both ends of the coil. When the discharge current reaches nearly the peak, the contact sheets collide at high speed like the welding sheets. Most of the current flowing through the coil commutates to the short-circuit including the contact sheets. Depending on the circuit conditions after the commutation, the coil current does not oscillate but gradually damps. We propose such a high-speed mechanical switch for magnetic pulse sheet-welding.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Magnetic pulse welding / Sheet metal / Electromagnetic force / Capacitor bank / Discharge current / Commutation / Mechanical switch
Paper # EMD2019-2
Date of Issue 2019-05-10 (EMD)

Conference Information
Committee EMD
Conference Date 2019/5/17(1days)
Place (in Japanese) (See Japanese page)
Place (in English) Cyberscience Center, Tohoku University
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Shinichi Wada(TMC System)
Vice Chair Yoshiki Kayano(Univ. of Electro-Comm.)
Secretary Yoshiki Kayano(Muroran Inst. of Tech.)
Assistant Yuichi Hayashi(NAIST)

Paper Information
Registration To Technical Committee on Electromechanical Devices
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Proposal of High Speed Mechanical Switch for Commutation of Discharge Current in Magnetic Pulse Welding of Sheet Metals
Sub Title (in English)
Keyword(1) Magnetic pulse welding
Keyword(2) Sheet metal
Keyword(3) Electromagnetic force
Keyword(4) Capacitor bank
Keyword(5) Discharge current
Keyword(6) Commutation
Keyword(7) Mechanical switch
1st Author's Name Tomokatsu Aizawa
1st Author's Affiliation Tokyo Metropolitan College of Technology(Tokyo Metropolitan College)
Date 2019-05-17
Paper # EMD2019-2
Volume (vol) vol.119
Number (no) EMD-41
Page pp.pp.7-11(EMD),
#Pages 5
Date of Issue 2019-05-10 (EMD)