Patent Number: 6,294,753

Title: Resistance welding machine control method

Abstract: A resistor welding machine control method for calculating a temperature distribution at a portion to be welded by using changes in welding current and voltage across two welding electrodes during welding and information on sheet combination sequence at a spot-welding position, and for controlling at least the welding current or pressure applied to the electrodes by using the calculated temperature distribution. The present invention can thus provide a resistor welding machine control method capable of controlling welding quality accurately. Spot-welding position information, wear comparison information and the like are available as other information.

Inventors: Fujii; Koji (Osaka, JP), Gotou; Yasuhiro (Kawanishi, JP), Ryudo; Makoto (Kawanishi, JP), Suzuki; Mikiji (Okazaki, JP)

Assignee: Matsushita Electric Industrial Co., Ltd.

International Classification: B23K 11/25 (20060101); B23K 011/24 ()

Expiration Date: 09/25/2018