METHOD FOR MAKING PARTS SUCH AS SADDLE-LIKE WASHERS AND COMBINATION PROGRESSIVE DIE SET FOR PERFORMING THE SAME Russian patent published in 1998 - IPC

FIELD: machine engineering industry branches, namely manufacture of parts used for fastening railway road sleepers. SUBSTANCE: parts are successively formed in the same die set. At first strip is punched, then it is moved until stopper and cut and simultaneously next groove is punched. When strip is fed by one stroke next groove is punched, blank is cut and bent in four angles. Formed part is automatically removed out of forming zone at strip feeding. Novelty is spring-loaded support tapered along its upper surface. Knocking out member is arranged in die cavity and it is joined by means of tie rods with upper plate. EFFECT: reliable removal of formed parts without additional strippers and manual operations. 3 cl, 5 dwg