Kinematic system for the displacement of working units of machines for bending and forming metallic sheets

A kinematic system for driving operating units of a bending machine designed to bend and shape sheet metal, said machine comprising a blade-holder unit with a “C” shaped cross-section, moveable along two mutually orthogonal directions with respect to a fixed bed, the unit being equipped with a bending blade and including an articulated mechanism including two mechanical units, and wherein

• the first mechanical unit includes:
• a servomotor, a drive crank having two ends, a connecting rod having two ends, a support having a first end and a second end, a first end of the crank being connected with the motor whereby rotation of the motor effects movement of the drive crank, a second end of the drive crank being connected to a first end of the connecting rod whereby movement of the drive crank creates movement of the connecting rod, a second end of the connecting rod being pivotally connected with the first end of the support, and the second end of the support being connected to the blade-holder unit such that movement of the connecting rod effects movement of the blade-holder unit;
• and
• the second mechanical unit includes:
• two servomotors and epicyclical reduction gears, the two servo motors being located spaced apart from each other, two drive cranks each having two ends, two connecting rods each having two ends, a first end of each respective crank being connected with a respective motor whereby rotation of the motor effects movement of the drive crank, a second end of each respective drive crank being connected to a first end of the respective connecting rod whereby movement of the respective drive crank creates movement of the respective connecting rod, a second end of each respective connecting rod being connected with the blade-holder unit such that movement of the respective connecting rods effects movement of the blade-holder unit.