Method and device for manufacturing a drill blank or a mill blank

摘要

The present invention relates to a method for manufacturing a drill blank or a mill blank by extrusion, said method comprising the forming of a first blank portion (B 1 ) having external, axially extending external flutes and the forming of a further blank portion (B 3 ) in the shape of a shaft. The invention also relates to a device for manufacturing a drill blank or a mill blank. The method according to the invention is characterised by: extruding a first blank portion (B 1 ) having a free end and external flutes; allowing the extrusion to continue to supply further extruding mass into a cavity ( 6 ), said supply of extruding mass completely filling out the external flutes of the first blank portion (B 1 ) to produce a second blank portion (B 2 ) integral with the first blank portion (B 1 ); allowing the extrusion to continue to produce a desired length of the first blank portion (B 1 ); and cutting off the first blank portion (B 1 ) at the end facing away from the second blank portion (B 2 ).