HERSTELLEN VON KOLBENRINGEN

摘要

PCT No. PCT/GB93/00420 Sec. 371 Date Sep. 6, 1994 Sec. 102(e) Date Sep. 6, 1994 PCT Filed Mar. 1, 1993 PCT Pub. No. WO93/17807 PCT Pub. Date Sep. 16, 1993.A machine for manufacturing piston rings from the metal strip (10). The machine comprises feeding means (12) for feeding the strip, shaping means (14, 16, 18, 20) for shaping successive portions of the strip into piston rings of a desired shape, and severing means (22) operable to sever the piston rings from the remainder of the strip. The machine also comprises displacing means (28) operable during each operation of the severing means (22) to move the severing means to substantially reduce the relative movement between the severing means and the point on the strip (10) at which the strip is severed. The severing means (22) is moved along a linear path which extends substantially tangentially to the path of said point.