1976-11-11
1977-10-11
Combs, E. M.
B21K 144, B21K 158
Patent
active
040527638
ABSTRACT:
A rivet making machine and method in which a stationary set of angularly spaced head forming tools and a ram supported reciprocable set of body working tools are aligned at angularly spaced stations with each other and with a set of body dies carried by a rotatable indexing disc for successive positioning at the work stations. The body dies are independently movable axially of the indexing plate as necessary for cooperation of the head forming and body working tools on a blank carried by each body die. Blank cut-off is effected by a shearing die pair, one die pair being established at the end of each body die opposite the end thereof cooperating with the head forming tools. The other of the shearing die pair may be a fixed die in which relative movement of the shearing die pair is accomplished by indexing movement of the body dies. Alternatively, a shearing tool establishing the other die of the pair may be moved independently of body die indexing.
REFERENCES:
patent: 2786217 (1957-03-01), Johnson
patent: 3031908 (1962-05-01), Lejdegard
patent: 3126561 (1964-03-01), Orloff
patent: 3200423 (1965-08-01), Byam et al.
patent: 3635389 (1972-01-01), Shibata
patent: 3934293 (1976-01-01), Lee
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