A welding auxiliary joining part with which a welding connection, in particular a resistance welding connection, is establishable between a first component (A) of poorly weldable material and a second component of weldable material, which comprises the following features: a. a punch shaft which is punchingly pressable into the first component (A) approximately rotation-free, which extends along a longitudinal axis (L) of the welding auxiliary joining part and which has an element head at a first axial end and a welding contact zone projecting in the axial direction from the punch shaft at a second axial end, b. the element head extends radially beyond the punch shaft and comprises a head upper side facing away from the shaft and a head underside facing towards the shaft, which are connected to one another by means of a circumferential face which radially delimits the element head , characterized in that c. the head underside comprises at least one first clamping ring which extends around the punch shaft in a closed manner and projects axially in the direction of the punch shaft , c1. which is arranged at a first radial distance from the punch shaft , c2. which has a triangular-like cross-sectional shape which tapers in the axial direction of the punch shaft , and c3. which is arranged at a side facing away from the punch shaft radially spaced from the circumferential face of the element head , wherein c4. the axial cross sectional shape of the clamping ring is formed by a radially inner ring side and a radially outer ring side , the inner ring side of which encloses with the punch shaft an inclination angle α in the range of 10° ≤ α ≤ 70°. a. a punch shaft which is punchingly pressable into the first component (A) approximately rotation-free, which extends along a longitudinal axis (L) of the welding auxiliary joining part and which has an element head at a first axial end and a welding contact zone projecting in the axial direction from the punch shaft at a second axial end, b. the element head extends radially beyond the punch shaft and comprises a head upper side facing away from the shaft and a head underside facing towards the shaft, which are connected to one another by means of a circumferential face which radially delimits the element head , characterized in that c. the head underside comprises at least one first clamping ring which extends around the punch shaft in a closed manner and projects axially in the direction of the punch shaft , c1. which is arranged at a first radial distance from the punch shaft , c2. which has a triangular-like cross-sectional shape which tapers in the axial direction of the punch shaft , and c3. which is arranged at a side facing away from the punch shaft radially spaced from the circumferential face of the element head , wherein c4. the axial cross sectional shape of the clamping ring is formed by a radially inner ring side and a radially outer ring side , the inner ring side of which encloses with the punch shaft an inclination angle α in the range of 10° ≤ α ≤ 70°. c1. which is arranged at a first radial distance from the punch shaft , c2. which has a triangular-like cross-sectional shape which tapers in the axial direction of the punch shaft , and c3. which is arranged at a side facing away from the punch shaft radially spaced from the circumferential face of the element head , wherein c4. the axial cross sectional shape of the clamping ring is formed by a radially inner ring side and a radially outer ring side , the inner ring side of which encloses with the punch shaft an inclination angle α in the range of 10° ≤ α ≤ 70°. <EOS>