PURPOSE: To eliminate the directivity in detection and to detect accurately the object to be welded with a simple power supply device by operating a rotating device to move the other end of a stylus to the same position as the tip of a welding wire and detecting electric discharge.
CONSTITUTION: When electricity is conducted to the coil of a rotary solenoid 9, a rotating shaft 9' rotates and a transmission shaft 19 and a rotating body 23 rotate; at the same time, a stylus 25 rotates, and when it is inserted into a positioning groove 28, the rotation is stopped. The other end of the stylus 25 is disposed in the same position where the tip of a welding wire fed in a torch 1 is ought to exist. A DC current of a power supply device is impressed between the stylus 25 and an object to be welded and the position of the arm of a welding robot is moved so that the stylus 25 touches the object. Electricity is discharged here, and the discharge is detected by a control section such as a computer of the robot, by which the position of the arm in the discharge stage is detected and the position of the object is detected.
OOTANI HIDEJI
HISAYASU AZUMA
MOGI SHIGEO
| JPS4990650A | 1974-08-29 |
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