B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/90
B23K 11/10 (2006.01) B23K 11/11 (2006.01) B23K 11/24 (2006.01) B23K 13/04 (2006.01) A61J 3/00 (2006.01)
Patent
CA 1300696
ABSTRACT OF THE DISCLOSURE High frequency resistance spot welding structure and method. In one embodiment, the structure includes dual, mirror image welding transformers, each including. a transformer secondary circuit, an endless transformer core, and a transformer primary winding wound around the transformer core The transformer secondary circuits may be single member, U-shaped transformer secondaries with integral electrode portions. In another embodiment, one of the transformers is replaced by a pair of spaced apart welding electrodes which are connected by a conductor. Means are provided for supplying welding pressure to the transformers to move them with their associated welding electrodes during a weld sequence. A high frequency, electrical welding signal is applied to the transformer primary circuits which are synchronized when two transformers are used so that the welding currents passing through the. transformer secondary circuits reinforce each other. The structure is small and light weight so as to be inexpensive, positioned immediately adjacent a weld, and moved quickly. The method of the invention includes providing the high frequency welding signal to the mirror image, closely spaced apart welding structures, synchronizing the high frequency welding signal to provide push/pull welding and providing forging pressure through the transformers or transformer to move-them with their associated electrodes during spot welding.
553815
Green Weldon F.
Medar Inc.
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