Patent ID: 6218638
Filing Date: 2001-04-17
Classification: B23K

Abstract:
A method for inspecting the quality of a resistance weld formed by passing a welding current between a pair of electrodes and through a welding portion of a material to be welded and applying pressure between said pair of electrodes to said welding portion for thermo-compression bonding of said welding portion comprising the steps of:measuring a welding width of said welding portion;calculating a reference welding height of said welding portion from the measured welding width on the basis of a predetermined reference welding sectional area of said welding portion;passing the welding current between said electrodes and through said welding portion until the height of said welding portion reaches said calculated reference welding height; andinspecting the quality of welding of the welding portion on the basis of a lowest value of inter-tip resistance of said pair of electrodes in an initial stage of conduction of the welding current.