Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Clamp structure constitutes sole initial metal-deforming...
Patent
1988-09-19
1990-02-20
Crane, Daniel C.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
Clamp structure constitutes sole initial metal-deforming...
72306, 2924358, B21D 504, B23P 1100
Patent
active
049015559
ABSTRACT:
A hemming apparatus for hemming the peripheral part of a work usable for a motorcar in the form of a door, a bonnet or the like includes a lower anvil on which the work is placed, an upper anvil adapted to support the peripheral part of the work from the above, a presser for supporting the peripheral part of the work from the lower side, a link arm of which one end is operatively connected to the lower end of a second hydraulic cylinder, a shaft of the link arm being turnably supported at a middle part thereof by a frame, a preliminary bending punch for primarily preliminarily bending the peripheral part of the work and a main bending punch for secondarily bending the peripheral part of the work. The lower end of the preliminary bending punch is operatively jointed to the link arm via a joint member at one end of the ink arm, while the lower end of the main bending punch is operatively jointed to the link arm via a joint member at an opposite end of the same. A lifter is used for placing on the lower anvil the work which is conveyed by suitable conveying means. The lifter may serve also as a presser using a plate on which the presser and the lower anvil are mounted.
REFERENCES:
patent: 2937689 (1960-05-01), Peterson
patent: 3143095 (1964-08-01), Tribe
patent: 3595061 (1971-07-01), Bessho
Crane Daniel C.
Hiroshima Press Kogyo Co., Ltd.
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