Apparatus for forming snap ring groove in clutch drum

Details Apparatus for forming snap ring groove in clutch drum Apparatus for forming snap ring groove in clutch drum

1995-10-17

1997-12-09

Larson, Lowell A

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72393, 723542, B21D 2200, B21D 4102

Patent

active

056948026

ABSTRACT:
An apparatus for forming a snap ring groove in a clutch drum by pressing a lower die, an upper die, a workpiece supporting member, first sliding members and second sliding members, a workpiece receiving member fixed on a radially inner end of each first sliding member, and a punch fixed on an upper end of each upwardly bent portion in a radially inner end portion of each second sliding member. The first sliding members and the second sliding members are pushed radially inwards and outwards, respectively, via a cam mechanism by lowering the upper die. The cam mechanism is made of a first cam mechanism for driving the first sliding members and a second cam mechanism for driving the second sliding members. The first cam mechanism is arranged to push the first sliding members radially inwards, when lowering the upper die, with a radially outer end portion thereof operating as a point of action. The second cam mechanism is arranged to push the second sliding members radially outwards, when lowering the upper die, with a radially inward end portion operating as a point of action.

REFERENCES:
patent: 2421935 (1947-06-01), Gosnell, Jr.
patent: 3314276 (1967-04-01), Peyton et al.
patent: 5222380 (1993-06-01), Halesz et al.

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