Patent ID: 8584346

Claim:
A method for producing a bar winding ( 18 ) for a stator ( 16 ) of an electric machine, which is a claw pole alternator for motor vehicles, which includes at least four conductor segments (I through VI; 36 ) in every winding overhang ( 45 , 46 ), which are radially superposed and are to be interconnected in pairs, wherein the stator ( 16 ) has an annular-cylindrical core ( 17 ) with a machine axis ( 27 ) and wherein the core ( 17 ) has grooves ( 34 ) open radially inward toward the machine axis, wherein said conductor segments are inserted in grooves ( 34 ) of the core ( 17 ) in a direction of the machine axis ( 27 ), comprising the following steps: forming a welded connection by connecting ends ( 42 ) of the conductor segments (I through VI; 36 ) via resistance welding, wherein said welding produces a welded connection that is positioned directly between two radial arresting forces; providing at least one electrode (±E, ±E 1 , ±E 2 ); wherein said resistance welding is accomplished by providing said at least one electrode, wherein said at least one electrode simultaneously controls a mechanical positioning ( 50 , 50 . 1 , 50 . 2 , 52 , 56 , 56 . 1 , 56 . 2 ) and current supply of the ends ( 42 ) of the conductor pairs (I, II; III, IV; V, VI) to be connected, such that a welding current (I) is guided through ends ( 42 ) of the conductor pairs (I, II; III, IV; V, VI) to be connected in a partially radial manner and in a partially axial manner relative to the machine axis ( 27 ), wherein after insertion of the conductor segments, an insulation ( 48 ) is mounted between a first pair of conductor segments (I-VI; 36 ) to be connected to one another and a second pair of conductor segments (I-VI; 36 ) to be connected to one another, and thereafter, the at least one electrode produces clamping forces in the radial direction on the insulation ( 48 ) between the first pair of conductor segments (I-VI; 36 ) to be connected to one another and the second pair of conductor segments (I-VI; 36 ) to be connected to one another.