Patent ID: 7237419
Filing Date: 2007-07-03
Classification: B21D

Abstract:
1. A bending tool for bending sheet metal and plate workpieces ( 52 ), along a bending line ( 13 ), with at least one bending element ( 23 ) for positioning on one side of the workpiece and with at least one retaining device having clamping elements ( 14 , 42 ) on mutually opposite sides in the transverse direction of the workpiece so that relative movement of the clamping elements ( 14 , 42 ) in the transverse direction of the workpiece permits said workpiece to be clamped to the retaining device, while the retaining device with the clamped workpiece arid a bending element ( 23 ) can be moved toward each other in a bending stroke that bends the workpiece, said bending stroke including a component in the stroke direction ( 8 ) extending in a transverse direction of the workpiece as well as a component in the cross stroke direction that extends transversely relative to the plane bounded by the direction of the bending line ( 13 ) and the said stroke direction ( 8 ), a motion control system which controls the direction of the bending stroke, said control system including at least one control element in the form of a link ( 46 ) which is operatively connected to the bending element ( 23 ), and at least one control element in the form of a link guide ( 47 , 50 ) which is operatively connected to move concurrently with a clamping element ( 42 ) provided on the same side of the workpiece as the bending element ( 23 ) and the link guide ( 47 , 50 ), said link guide ( 47 , 50 ) consisting of a control roller ( 47 ) which is arranged on one side of the link ( 46 ) and a control pin ( 50 ) which is arranged on the outer side of the link ( 46 ), and wherein, the clamping element ( 42 ) to which the link guide ( 47 , 50 ) is operatively connected during the bending stroke to move concurrently therewith, said clamping element ( 42 ) being free to move relative to the bending element ( 23 ) to which the link ( 46 ) is operatively connected to move concurrently therewith, said bending element ( 23 ) being stationary and supported in the stroke direction ( 8 ) with the control roller ( 47 ) and the control pin ( 50 ) of the link guide ( 47 , 50 ) being free to move in the stroke direction ( 8 ) relative to the link ( 46 ).