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Paper Abstract and Keywords
Presentation 2019-05-17 14:00
Proposal of High Speed Mechanical Switch for Commutation of Discharge Current in Magnetic Pulse Welding of Sheet Metals
Tomokatsu Aizawa (Tokyo Metropolitan College) EMD2019-2 Link to ES Tech. Rep. Archives: EMD2019-2
Abstract (in Japanese) (See Japanese page) 
(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) 
(in English) Magnetic pulse welding / Sheet metal / Electromagnetic force / Capacitor bank / Discharge current / Commutation / Mechanical switch /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 41, EMD2019-2, pp. 7-11, May 2019.
Paper # EMD2019-2 
Date of Issue 2019-05-10 (EMD) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EMD2019-2 Link to ES Tech. Rep. Archives: EMD2019-2

Conference Information
Committee EMD  
Conference Date 2019-05-17 - 2019-05-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Cyberscience Center, Tohoku University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMD 
Conference Code 2019-05-EMD 
Language Japanese 
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)
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Date Time 2019-05-17 14:00:00 
Presentation Time 25 
Registration for EMD 
Paper # IEICE-EMD2019-2 
Volume (vol) IEICE-119 
Number (no) no.41 
Page pp.7-11 
#Pages IEICE-5 
Date of Issue IEICE-EMD-2019-05-10 

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