18756841. INSPECTION METHOD (TOYOTA JIDOSHA KABUSHIKI KAISHA)
INSPECTION METHOD
Organization Name
TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor(s)
Tomohiko Sekiguchi of Nagakute-shi (JP)
Toru Hioki of Nisshin-shi (JP)
Tomoko Ogasahara of Nagoya-shi (JP)
Shota Ejima of Nagoya-shi (JP)
Takaya Obara of Toyota-shi (JP)
INSPECTION METHOD
This abstract first appeared for US patent application 18756841 titled 'INSPECTION METHOD
Original Abstract Submitted
To provide an inspection method by which a poorly-welded workpiece can be discriminated with high accuracy even under the presence of disturbances. According to the present disclosure, an inspection method for spot welding in which an electrical current is applied to electrodes that sandwich steel plates includes: calculating a contraction amount of the steel plates at the electrodes from a welding force and an inter-electrode displacement amount after the end of application of the electrical current to the electrodes, and determining that the spot welding is poor when the contraction amount is equal to or below a discrimination threshold.