Patent ID: 6337457
Filing Date: 2002-01-08
Classification: B23K

Abstract:
A stud welding device with an adjustment member (3), displaceable axially forward and backward, a stud holder (2), connected to the adjustment member (3), so the movement thereof is transmitted to the stud holder (2),a drive unit (4), having a coil (15) which can be connected to a source of current, the coil (15) being rigidly attached to a hollow body (14) connected to the adjustment member (3), which hollow body is arranged as axially movable in an air gap between a magnetisable core (8) and a magnetisable casing, and with a compression spring (19) acting on the adjustment member (3), pressing this into an end position defined by a buffer (23, 57), characterized in that the core (8) has a recess (45), extending from a front face (48) adjacent to the adjustment member (3) over at least a part of the axial length of the core (8), into which the compression spring partially protrudes, wherein the recess (45) is designed as coaxial to the adjustment member (3).