Method and apparatus for stamping weld adapters

Details Method and apparatus for stamping weld adapters Method and apparatus for stamping weld adapters

1989-09-01

1991-05-21

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72333, 72339, 10 86F, B21D 2806

Patent

active

050164619

ABSTRACT:
A progressive die apparatus and method for cold forming weld adapters. A progressive die apparatus, preferably having at least four working stations and several idle stations, is used to form, weld adapters from rectangular bar stock having a thickness of at least about 3/8 inch. Plain-carbon steel bar stock material or other weldable metal material is successively fed through the progressive die apparatus, which is preferably installed in a knuckle-joint power press. The cold forming method includes the following steps: (a) at a first working station piercing the first hole; (b) at a second working station coining the stock material in the area surrounding the first hole to define a collar-like configuration including a hollow region for receiving the fastener; (c) at a third working station repiercing said stock material to remove material that was displaced in the first hole during the coining step; (d) successively advancing stock material from the first to the last working stations; and (e) at a fourth working station cutting the stock material after steps (a) through (c).

REFERENCES:
patent: 1325194 (1919-12-01), Geist
patent: 2096623 (1937-10-01), Almdale
patent: 2105139 (1939-01-01), Demboski
patent: 2221598 (1940-11-01), McLaughlin
patent: 3010126 (1961-11-01), Willcox
patent: 3251079 (1966-05-01), Anderson
patent: 3397431 (1968-08-01), Walker
patent: 3414220 (1968-12-01), Walker
Hydro-Craft, Inc. Hydraulic Products & Accessories Catalog No. 807, (front & back cover and pp. 11-14), Aug. 1981.

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