Patent ID: 7347075
Filing Date: 2008-03-25
Classification: B21J,B21K

Abstract:
1. A procedure for the cold processing of tubular metal elements or other elements with dead or through holes, nuts, comprising the following machining steps: (a) preparing a blank of full metal material from rolls; (b) straightening the full metal material after unrolling from the skein; (c) cutting the metal material into pieces of a determined length; (d) passing each piece sequentially through a plurality of work stations of a work centre comprising several cold hydraulic presses in order to obtain a blank element presenting one or two longitudinally opposite dead holes separated by a central transverse section, wherein each piece is first cold machined by a hydraulic press, then extracted from said hydraulic press by means of a suitable manipulator robot and conveyed to an adjacent hydraulic press for a subsequent cold machining operation; and (e) through drilling the blank to remove the central traverse section; wherein the metal elements have a diameter greater than 30 mm.