The invention discloses an arc type self-adaptive
stud welding gun. The interior of a cavity of a
welding gun casing is provided with a main shaft body, a movable iron core, a fixing sleeve, a stationary iron core and a
control circuit device, the front end of the main shaft body is provided with an integral clamping head seat, the interior of the fixing sleeve is provided with a coil, the main shaft body is movably arranged in a shaft sleeve in a penetrating way, the shaft sleeve is fixedly arranged in the cavity, the front end of the fixing sleeve is movably inserted into the movable iron core, the
tail end of the fixing sleeve is inserted into the stationary iron core, a lifting clearance is formed between the movable iron core and the stationary iron core, a reset structure is arranged in the
welding gun casing and is used for resetting the main shaft body after arc striking, a
damper is fixedly arranged in the
welding gun casing and is used for the main shaft body to stably reset, a self-adaptive structure is arranged between the main shaft body and a driving shaft and is used for the driving shaft to adjust the self position, the driving shaft is arranged at the
tail end of the main shaft body in an electric insulation way, and a locking structure with an engagement and disengagement function is arranged between the driving shaft and the movable iron core. The arc type self-adaptive
stud welding gun has the advantages that the main shaft body can be stably reset after arc striking, the smooth sliding of the main shaft body along the axial direction is guaranteed, and the set lifting clearance is not changed.