Metal deforming – By relatively movable offset tool-faces – With tool motion in fixed path
Patent
1982-09-15
1984-06-12
Crane, Daniel C.
Metal deforming
By relatively movable offset tool-faces
With tool motion in fixed path
72312, 72386, B21D 501, B21D 516
Patent
active
044533969
ABSTRACT:
A hemming apparatus comprising a body; a bottom form fixed to the body; a top-form ram provided above the bottom form and vertically movable against the bottom form; a bracket set up on the body at the side of the bottom form; a yoke rotatably pivoted to the bracket and pressable by the top-form ram; and a bending blade fixed to a tip end of the yoke and integrally formed therein with a preliminary bending blade surface for preliminarily bending a work and a primary bending blade surface for bending the preliminarily bent work to a finished state. By this structure, the hemming apparatus has novel features of simplifying the apparatus, preventing displacement of the work during bending-formation, and preventing an outer plate from being wrinkled, while the advantage of a conventional hemming apparatus of continuously carrying out preliminary and primary bending operations by lowering movement of a top-form ram is retained.
REFERENCES:
patent: 944559 (1909-12-01), Johnston
patent: 1527375 (1925-02-01), Nystrom
patent: 1572376 (1926-02-01), Bingham
patent: 1575487 (1926-03-01), Huber
patent: 1785537 (1930-12-01), Stevens
patent: 1966472 (1934-07-01), Way
patent: 2225988 (1940-12-01), Greif
patent: 2370128 (1945-02-01), Aneiros
patent: 2726702 (1955-12-01), Laxo
patent: 2822545 (1958-02-01), Eickhoff
patent: 3058512 (1962-10-01), Chebuhar et al.
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