| 摘要 |
A bending machine comprising a plurality of bending units (10) arranged to make bends in a common plane, the bending units being mounted so that the separation thereof is adjustable, and apparatus (20) for holding and turning a workpiece (13) about a predetermined axis (18) mounted so that said predetermined axis is aligned or alignable with said common plane; said apparatus comprising a plurality of jaw members (24,25), movable in unison about the predetermined axis; wherein each jaw member is axially open ended, has a central socket (28) and a mouth (27) extending from said socket to interrupt the periphery of the jaw member, and wherein said jaw members are interconnected and mounted so that- (a) they are rotatable in unison about the predetermined axis (18) when at least one thereof is driven by driving means (45), (b) one (25) thereof is arcuately movable relative to the other or others between an open position, in which the mouths are aligned to admit a workpiece into the sockets, and a clamping position in which said mouths are not aligned to trap the workpiece in the sockets, and (c) in said clamping position the socket of said one thereof is eccentric to the other or others of the sockets to exert a clamping force on the trapped workpiece. r |
