B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
26/181, 78/26
B21D 28/06 (2006.01)
Patent
CA 1048817
ABSTRACT OF THE DISCLOSURE 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 mechani- cal press wherein the end portion of the tubing is flattened by flat- tening means to form a first flattened web end. Sequentially follow- ing without any further flattening the web end is punched by punch- ing means located in the flattening means to form a cross pin re- ceiving hole and a terminal end portion, The tubing is then ad- vanced in the die assembly whereupon it is again flattened and punched sequentially by the flattening and punching means respect- ively to form a second web end. Gripping means located on the sequencing die outwardly adja- cent 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 align- ing 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 and for consisting predetermined web lengths. It includes antitwisting means to prevent angular twisting of the web ends relative one another during forming.
273402
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