Patent ID: 8839486
Filing Date: 2014-09-23
Classification: B21J,B21K,F16B,Y10T

Abstract:
1. A pre-installation component comprising at least one pre-pierced sheet metal part ( 40 ) into which at least one punch-in element ( 10 ) has been pressed, the punch-in element ( 10 ) having a hollow head part ( 12 ) of larger transverse dimension (D1), a hollow shaft part ( 14 ) having an internal thread ( 30 ), an outer periphery and a free end and being of smaller transverse dimension (D2) than the head part, the hollow shaft part projecting away from one side ( 16 ) of the head part ( 12 ), there being an annular sheet metal contact surface ( 18 ) formed at the one side ( 16 ) of the head part ( 12 ) and surrounding the hollow shaft part ( 14 ), and a plurality of longitudinal ribs ( 20 ) at the outer periphery of the hollow shaft part ( 14 ) which extend in an axial direction along the hollow shaft part ( 14 ) from the sheet metal contact surface ( 18 ) to close to a free end ( 24 ) of the hollow shaft part ( 14 ); the punch-in element being pressed into the sheet metal part with the free end ( 24 ) to the fore, to such an extent that an end part ( 44 ) of the hollow shaft part ( 14 ) of the punch-in element projects out of the sheet metal part; wherein some but not all of the longitudinal ribs ( 20 ) are fully or partly displaced from the end part ( 44 ) of the hollow shaft part ( 14 ) and reshaped into material noses ( 52 ) by being sheared and compressed, with the material noses ( 52 ) engaging radially into the material of the sheet metal part ( 40 ) fully or partly contacting the sheet metal part and the sheet metal part ( 40 ) being clamped between the noses ( 52 ) and the sheet metal contact surface ( 18 ) and wherein the remaining non-displaced longitudinal ribs ( 20 ) are still present at the end part ( 44 ).