Roll-through cold forming apparatus

Metal deforming – By use of roller or roller-like tool-element – Included in roller-cluster

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72402, B21D 5112

Patent

active

041787900

ABSTRACT:
A roll-through cold forming apparatus adapted to form simultaneously a plurality of either external or internal straight spline or gear type teeth on a cylindrical workpiece carried on a movable ram. In one embodiment the apparatus includes a plurality of radially disposed pivotally mounted teeth forming blades which are disposed around the axis of movement of a linearly movable ram, whereby when the ram moves in one direction past the teeth forming blades, the blades are engaged by an interference contact with the workpiece carried on the ram, and the teeth forming blades are moved over the external surface of the workpiece in a rolling contact action so as to displace the material of the workpiece between each tooth forming edge of each of the blades. The material on the external surface of the workpiece is formed around the radius of each of the tooth forming edges of each of the forming blades on a line with the configuration of each tooth forming edge. In another embodiment the apparatus includes a plurality of radially disposed, rotary type teeth forming dies.

REFERENCES:
patent: 839569 (1906-12-01), Numan
patent: 2367226 (1945-01-01), Lonsdale
patent: 2430368 (1947-11-01), Rearden
patent: 2929282 (1960-03-01), Retterath
patent: 3396570 (1968-08-01), McCardell
patent: 3763688 (1973-10-01), Cug
patent: 4004442 (1977-01-01), Strelchenko

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