B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 28/00 (2006.01) B01D 53/38 (2006.01) B01J 35/04 (2006.01) B23K 11/00 (2006.01) B23K 11/11 (2006.01) F01N 3/28 (2006.01)
Patent
CA 2073761
Disclosed is a multi-point welding method capable of certainly welding an object having a number of points to be welded for a short time. First, an approximately cylindrical base body is formed by alternately laminating a flat sheet and a corrugated sheet and then winding them in a spiral shape. In this case, there exist a number of contact points of the flat sheet to the corrugated sheet, that is, points to be welded. Next, there is provided an electrode apart from one end surface of the base body by a specified interval and facing to the end surface. After that, by intermittently applying a current across the electrode and the one end surface of the base body thereby intermittently generating electric discharges between the electrode and the one end surface of the base body, to thus fuse and weld the points to be welded of the flat sheet to the corrugated sheet. With this arrangement, it is possible to certainly weld multi- points to be welded for a short time by only intermittently applying electric discharges.
Hashimoto Ichiro
Ito Keiji
Kawabe Yasuyuki
Matsuo Kiyotaka
Yokoi Masao
Fetherstonhaugh & Co.
Nippon Soken Inc.
Nippondenso Co. Ltd.
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