Process and apparatus for the production of webbing take-up spin

Details Process and apparatus for the production of webbing take-up spin Process and apparatus for the production of webbing take-up spin

1994-10-18

1996-11-19

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

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

72356, 72335, 72340, B21D 2200, B21D 2800

Patent

active

055751717

ABSTRACT:
A process is provided for the production of a webbing take-up spindle by cold-forming of a cylindrical blank. The cylindrical blank is cold-formed into a preform having a flange-shaped disc portion and a spindle portion extending from and in continuation with said disc portion. Wedge action dies, whose pressing portions are in the form of ratchet teeth, are pressed against an upper and lower sides of an outer peripheral portion of the disc portion, respectively, so that ratchet teeth are partially formed and a thin-walled portion is also formed circumferentially along said partially-formed ratchet teeth. The thin-walled portion is then punched to fully form the ratchet teeth. A forming apparatus suitable for use in the practice of the process is also disclosed.

REFERENCES:
patent: 1336493 (1920-04-01), Tibbetts
patent: 1360358 (1920-11-01), Beall
patent: 2991552 (1961-07-01), Chatfield
patent: 3258834 (1966-07-01), Rork
patent: 4027376 (1977-06-01), Brinkman

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