Patent ID: 8087279
Filing Date: 2012-01-03
Classification: B21K

Abstract:
1. A method for manufacturing a legged annular member, the legged annular member comprising a ring-like annular part and at least one leg formed on an outer peripheral side of the annular part and generally perpendicular to the annular part, the method comprising: (a) forming a work member from a raw material with a predetermined shape, with the work member comprising the annular part and a skirt-like outer wall part that has a leg part forming the leg and a connecting part connected with the leg part, wherein the leg part and connecting part are joined at a joining region; (b) forming an intermediate legged annular member by removing the connecting part from the formed work member; and (c) forming the legged annular member by performing a process to expand an inner diameter of the leg part while performing a process to remove a burr on the joining region.