Patent ID: 7191630
Filing Date: 2007-03-20
Classification: B21C

Abstract:
1. A method of equal channel angular extrusion of flat billets having a large ratio of dimensions along longitudinal billet axes to a billet thickness through first and second intersecting channels of identical cross sections, said method comprising the steps of: a) inserting the billet into the first channel whose length and width correspond to longitudinal billet dimensions while a thickness corresponds to the billet thickness; b) extruding the billet from the first channel into the second channel, which is contiguous with and oriented at an angle to the first channel; c) ejecting the billet from the second channel; d) rotating the billet 180 degrees about one of the longitudinal billet axes; e) rotating the billet 90 degrees about a perpendicular axis to a billet flat surface; and f) inserting the billet into the first channel, and in extruding the billet from the first channel into the second channel, ejecting the billet from the second channel.