US 12,214,438 B2
Spatter detection method
Hiroki Toyoda, Tokyo (JP); Xihao Tan, Tokyo (JP); Hitoshi Saito, Tokyo (JP); and Shinya Watanabe, Tokyo (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Mar. 9, 2023, as Appl. No. 18/180,872.
Claims priority of application No. 202210346167.8 (CN), filed on Mar. 31, 2022.
Prior Publication US 2023/0311234 A1, Oct. 5, 2023
Int. Cl. B23K 11/25 (2006.01); B23K 31/12 (2006.01); G01R 29/02 (2006.01)
CPC B23K 11/257 (2013.01) [B23K 31/125 (2013.01); G01R 29/023 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A spatter detection method for detecting an occurrence of spatter in a spot welding method for joining a workpiece by supplying a welding current, wherein
the spot welding method includes supplying the welding current having a pulse-shaped waveform by alternately executing a step of maintaining the welding current within a set peak current range and a step of decreasing the welding current from the peak current range toward a bottom current and then increasing the welding current toward the peak current range when an effective value of the welding current reaches a set target range for a plurality of cycles,
the spatter detection method comprising measuring a pulse width in each cycle of the pulse-shaped waveform and detecting the occurrence of spatter when a difference between the pulse width in a target cycle and the pulse width in a cycle immediately before the target cycle exceeds a predetermined width.