Process of manufacture of a conical, annular workpiece and workpiece obtained by said process

摘要

The procedure involves cutting a metal wire (1) to the required length (2). The wire is then bent into a ring (3), the two ends (4,5) are welded together and then the resulting workpiece is compressed by a stamping press to give the required shape. The pressing can be carried out in two stages, first giving a flat ring and then a truncated conical one. After welding the ends of the ring together the weld can be heat treated to homogenise the mechanical performance in the weld zone. The completed ring is subjected to degreasing, drying and oiling operations.