Metal deforming – With cutting – By shearing tool-couple
Patent
1976-01-02
1977-07-05
Simpson, Othell M.
Metal deforming
With cutting
By shearing tool-couple
72367, B21D 2806, B21D 2804, B21D 2826, B21D 4326
Patent
active
040331660
ABSTRACT:
A sequencing die and method for forming truss webs or links from metal tubing includes as a first step providing a continuous length of tubing to a die assembly operably engaged by a mechanical press wherein the end portion of the tubing is flattened by flattening means to form a first flattened web end. Sequentially following without any further flattening the web end is punched by punching means located in the flattening means to form a cross pin receiving hole and a terminal end portion. The tubing is then advanced in the die assembly whereupon it is again flattened and punched sequentially by the flattening and punching means respectively to form a second web end.
Gripping means located on the sequencing die outwardly adjacent the die assembly grip the tubing during the forming of the webs. They are configured for movement relative to the die assembly to allow lateral displacement of the tubing during flattening aligning the web ends with the longitudinal centerline of the tubing.
Indexing means allows longitudinal indexing of the first web end relative to the die assembly allowing accurate separation of the second web end for consistent predetermined web lengths. It includes antitwisting means to prevent angular twisting of the web ends relative one another during forming.
REFERENCES:
patent: 1144281 (1915-06-01), Andrews
patent: 1849669 (1932-03-01), Glasner et al.
patent: 2838111 (1958-06-01), Baltus
patent: 2844204 (1958-07-01), Beebee
patent: 3260087 (1966-07-01), Guarino
patent: 3263465 (1966-08-01), Way et al.
patent: 3436949 (1969-04-01), Halstead et al.
Culver Horace M.
Farley Eugene D.
Simpson Othell M.
Trus Joist Corporation
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