Punching element, preassembly component, assembly component and method

摘要

The punch-in element (10) has a hollow head portion (12) of larger transverse dimension (D1) and a hollow shaft portion (14) of smaller transverse dimension (D2). The hollow shaft portion is projected away from one side (16) of head portion. A ring-like sheet metal contact surface (18) is formed at the side of the head portion to surround the shaft portion. Several ribs (20) are provided at an outer periphery of the shaft portion and extended in an axial direction (22) along the shaft portion from sheet metal contact surface to close to a free end (24) of shaft portion. Independent claims are included for the following: (1) a pre-assembly component; (2) a component assembly; (3) a method for manufacturing the pre-assembly component; and (4) a method for manufacturing the component assembly.