Patent ID: 8984921
Filing Date: 2015-03-24
Classification: B21D

Abstract:
1. A device for generating or processing work pieces from a preform ( 4 . 1 ), the device having an axially movable mandrel ( 1 a ) which is mounted so that it can be rotated about a longitudinal axis (x) of the device and displaced axially parallel to and along the longitudinal axis (x), and a chuck ( 1 b ) for tensioning the preform ( 4 . 1 ) and a sleeve ( 2 a ) which can be coupled to the mandrel ( 1 a ) and is mounted displaceably along the longitudinal direction (x) and a shaping unit ( 3 ) for shaping the preform ( 4 . 1 ), wherein the preform ( 4 . 1 ) can be axially and radially fixed and tensioned in a composite unit comprising the sleeve ( 2 a ) and the mandrel ( 1 a ) so that a closed unit comprising the sleeve ( 2 a ), the preform ( 4 . 1 ), the mandrel ( 1 a ) and the chuck ( 1 b ) is formed, wherein the device comprises a catch element ( 1 d ), wherein the shaping unit ( 3 ) can be moved in an axial direction towards the catch element ( 1 d ) so that the preform ( 4 . 1 ) is pressed upon contact with the catch element against the catch element ( 1 d ), characterized in that the mandrel ( 1 a ) and catch element ( 1 d ) are coupled together to a main spindle ( 1 ) and prevented from rotational movement independent of one another, and wherein the chuck ( 1 b ) is axially fixed with the axially movable mandrel ( 1 a ), wherein the chuck ( 1 b ) is configured for rotational movement about said longitudinal axis (x) independent of and in relation to any rotational movement of said mandrel, and wherein the chuck ( 1 b ) is configured for rotational movement about said longitudinal axis (x) in relation to said preform ( 4 . 1 ).