Welding auxiliary joining part, matrixes for placing the welding auxiliary joining part, and connection and production methods for the welding auxiliary joining part and the matrixes

A connection method for a welding auxiliary joining part with a head and a rounded tip for setting in at least one first component of a poorly weldable material with a die as a counter-bearing having a concave recess with an arc-shaped inner wall at least in a partial portion thereof, wherein said die has a die radius MR in a range of 1.0 mm≤MR≤60 mm for preparing a subsequent welding method, wherein the connection method comprises the steps of:

• setting the welding auxiliary joining part in the at least one first component of the poorly weldable material and against the die, wherein there is a material displacement gap provided between a tip portion of the welding auxiliary joining part and the die into which the poorly weldable material of the at least one first component is capable of being removed radially outwardly, and
• deforming the tip portion of the welding auxiliary joining part directly at the die, while the following conditions are fulfilled:
• 0.01
• ≤
• SR
• MR
• ≤
• 1
• ,
• wherein SR denotes a tip radius of the rounded tip of the welding auxiliary joining part.

A connection method for a welding auxiliary joining part with a head and a rounded tip for setting in at least one first component of a poorly weldable material with a die as a counter-bearing comprising a concave recess with an inner wall arc-shaped in at least a partial portion with a die radius MR in a range of 1.0 mm≤MR≤60 mm, for preparing a subsequent welding method, wherein the connection method comprises the steps of:

• setting the welding auxiliary joining part in the at least one first component of the poorly weldable material and against the die, wherein there is a material displacement gap provided between a tip portion of the welding auxiliary joining part and the die into which the poorly weldable material of the at least one first component is capable of being removed radially outwardly, and
• deforming the tip portion of the welding auxiliary joining part directly at the die, while the following conditions are fulfilled:
• 0.01
• ≤
• SR
• MR
• ≤
• 0.5
• ,
• wherein SR denotes a tip radius of the rounded tip of the welding auxiliary joining part.

A connection method for a welding auxiliary joining part with a head and a tip for setting in at least a first component of a poorly weldable material with a die as a counter-bearing, which has a recess with a die angle MW between a central axis of the recess and an inner wall of the recess, for preparing a subsequent welding method, the connection method comprising the steps of:

• setting the welding auxiliary joining part in the at least one first component of the poorly weldable material and against the die, wherein there is a material displacement gap provided between the welding auxiliary joining part and the die into which the poorly weldable material of the at least one first component is capable of being removed radially outwardly, and
• deforming the tip portion of the welding auxiliary joining part at the die, while the following conditions are fulfilled:
• 0.4
• ≤
• SR
• MR
• ≤
• 1.0
• ,
• wherein SW denotes a tip radius of the tip of the welding auxiliary joining part measured between the central axis and a outer surface of the welding auxiliary joining part.