| 摘要 |
<p>A rotary forging machine for the rotary forging of elongate workpieces, has a first platen (28) fixed against rotary movement and a second platen (40) rotatable relative to the first platen (28). The first and second platens (28 and 40) have mutually cooperating opposed working surfaces (30, 76) between which a rotary forging operation is effected in use. At least one of the platens (28, 40) is displaceable along a displacement axis towards the other platen. A precession drive precesses the second platen (40) so that its axis of rotation (50) is precessed at an acute angle about the displacement axis. Rolls (80) feed an elongate workpiece (W) in stepwise fashion between the working surfaces (30, 76) from an inlet side (36) to an outlet side (38) of the machine. The first platen (28) has a guide groove (34) in its working surface (30) extending inwardly of the latter from an edge of such working surface (30) at the inlet side (36) of the machine. The guide groove (34) has a depth over a portion of its length adjacent the inlet side (36) of the machine which is greater than the corresponding dimension of the workpiece (W). The rolls (80) are synchronised with the precession drive means so that the rolls (80) present a fresh portion of the elongate workpiece (W) to a working zone of the machine when the precession drive has precessed the second platen (40) so that it is no longer performing a rotary forging operation on the workpiece (W) in the working zone.</p> |
