Process for the manufacture of a rack

Details Process for the manufacture of a rack Process for the manufacture of a rack

1985-08-02

1987-03-03

Crane, Daniel C.

Metal deforming

With means to effect compound motion of tool

291592, 74422, B21K 100, B21D 5300, B21J 1302

Patent

active

046465545

ABSTRACT:
A process for the manufacture of a rack, specially a rack having variable transmission, wherein the teeth of the rack have in the central area a profile different from that of the outer portions. The rack is formed from a blank in a press having an upper die and a lower die. The rack is manufactured by cold-mold pressing and one die portion carries out, during the pressing operations, a wobbling movement over the blank. In an apparatus for carrying out the process, a die forms the negative mold for the lower portion of the rack to be manufactured. In the other die is molded in negative mold the toothed profile of the rack to be manufactured.

REFERENCES:
patent: 2463771 (1949-03-01), Hunz
patent: 2487553 (1949-11-01), Hunz
patent: 3107559 (1963-10-01), Beche
patent: 3494161 (1970-02-01), Silichev
patent: 3703823 (1972-11-01), Wilson
patent: 3753378 (1973-08-01), Bishop
patent: 4116085 (1978-09-01), Bishop
patent: 4215591 (1980-08-01), Bishop
patent: 4296641 (1981-10-01), May
VDI Report No. 266, Heinrich Schmid, "Umformen Nach Dem Taumelverfahren," 1976, pp. 29-35.

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