Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Plural or complex apparatus
Patent
1987-09-21
1989-07-04
Crane, Daniel C.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
Plural or complex apparatus
269287, 269229, 269217, 279 34, B21D 7022
Patent
active
048438618
ABSTRACT:
A bending machine comprises a plurality of bending units arranged to make bends in a common plane. The bending units are adjustably mounted to adjust the separation thereof in the common plane. Apparatus for holding and turning a workpiece about a predetermined axis is mounted between the bending units so that the predetermined axis is aligned or alignable with the common plane. The apparatus comprises a plurality of jaw members rotatable in unison about the predetermined axis. Each jaw member is axially open ended, has a central socket and a mouth extending from said socket to interrupt the periphery of the jaw member. The jaw members are interconnected and mounted to rotate in unison about the predetermined axis when at least one thereof is driven by a driving mechanism. A clamping jaw member 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 the mouths are not aligned to trap the workpiece in the sockets. In the clamping position, the socket of the clamping jaw member is eccentric to the other or others of the sockets to exert a clamping force on the trapped workpiece.
REFERENCES:
patent: 268752 (1882-12-01), Trobach
patent: 774563 (1904-11-01), Clark
patent: 2600707 (1952-06-01), Turnbaugh
patent: 2729038 (1956-01-01), Hutchins
patent: 2883198 (1959-04-01), Narumi
patent: 2952467 (1960-09-01), Van Der Velden
patent: 4467681 (1984-08-01), Oeming
patent: 4604885 (1986-08-01), Lang
Crane Daniel C.
Langbow Limited
Markva Neil F.
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