Patent ID: 6109499
Filing Date: 2000-08-29
Classification: B21F

Abstract:
A device for moving wire on machine tools, especially applicable to forging machines for producing bolts and screws, and which is driven by a rotation shaft (10) of the machine tool, said device comprising:a) a carriage (28) having an alternating axial movement for moving said wire;b) a pliers (30) mounted on said carriage (28) having a front arm (32) and a back arm (34) articulated with one another on a pin (36), said back arm (34) operatively communicating with a lever (42) actuated by a first cam (46) driven by said rotation shaft (10), said front arm (32) being adapted to engage said wire by the action of said first cam (46) followed by said lever (42) and said back arm (34) during the forward movement of said carriage (28); andc) a blocking means (52) adapted to engage said wire during the rearward movement of said carriage (28), said blocking means (52) including a first arm (54) actuated by a second cam (48) driven by said rotation shaft (10), a second arm (56) operatively communicating with said first arm (54) through a pin (60) longitudinally extending through said second arm (56), and a pressing member (58) which engages said wire by the action of said second cam (48) followed by said first arm (54) and said second arm (56) during the rearward movement of said carriage (28).