Patent ID: 7487659

Claim:
A machine ( 20 ) for the working of sheet metal parts ( 1 , 2 ), comprising a tool-carrying unit ( 10 ; 11 , 12 ); a workpiece-carrying structure ( 88 ); a supporting structure ( 24 , 26 ); a movable unit ( 28 ) which carries the tool-carrying unit ( 10 ; 11 , 12 ) and is slidably mounted on the supporting structure ( 24 , 26 ) along a first direction (Z), or working direction; and a first driving system for controlling the movement of the movable unit ( 28 ) in the first direction (Z), the first driving system including a first driving shaft ( 62 ), a first. motor unit ( 60 ) for controlling the rotation of the first driving shaft ( 62 ) and a mechanism for converting the rotational movement of the first driving shaft ( 62 ) into the translational movement of the movable unit ( 28 ), wherein the said mechanism comprises a first cam member ( 76 ) driven by the driving shaft ( 62 ) and a first engagement surface ( 86 ) arranged to co-operate with an outline ( 76 a ) of the first cam member ( 76 ) to bring about a first working movement of the movable unit ( 28 ); characterized in that the first engagement surface ( 86 ) is provided by the workpiece-carrying structure ( 88 ).