Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Locking means
Patent
1989-01-09
1989-09-19
Eley, Timothy V.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Locking means
74 84R, B23B 2924
Patent
active
048670138
ABSTRACT:
A button press has an indexable turntable on which are mounted a plurality of alternating lower forming die asseblies and crimping die assemblies. The lower die assemblies are positioned beneath an upper die assembly as the turntable is indexed. The upper die assembly is reciprocated towards and away from the lower die assemblies to first form a cover sheet and display sheet about a metal button front and then to join that subassembly to a metal back having a pin. The indexing of the turntable and the vertical reciprocation of the upper die assembly are provided by a single electric motor. The motor drives a sprocket which is mounted on a shaft leading to a right angle drive mechanism which converts the continuous rotation of the shaft into incemental rotary motion of the turntable. A vertical linkage extends from a face of the sprocket to one end of a walking beam whose other end is connected to a ramrod that mounts the upper die assembly. A control for the electric motor allows continuous or intermittent incremental operation and includes switches that sense the position of the turntable to insure that the lower die assemblies are aligned beneath the upper die assembly when a press operation is to occur.
REFERENCES:
patent: 3516303 (1970-06-01), Imgrund
patent: 4464948 (1984-08-01), Lindemeyer
patent: 4721017 (1988-01-01), Jorgensen et al.
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