Abstract: The invention is a clamping plate used to stiffen and hold a large, thin workpiece having low inherent stiffness. The clamping plate has a back layer, an intermediate layer and a contact layer. A plurality of grooves, which serve as air channels, is provided in the contact layer and the intermediate layer impart flexibility to the clamping plate. The clamping plate has sufficient flexibility to adapt to the specified contour of the workpiece. The contact layer is placed against the workpiece and vacuum apparatus provides suction through the air channels, which are in flow communication with each other between the two layers, to hold the workpiece against the clamping plate. One or more seals defines a holding area on the contact layer and prevent loss of suction.

Abstract: The invention is a clamping plate used to stiffen and hold a large, thin workpiece having low inherent stiffness. The clamping plate has a back layer, an intermediate layer and a contact layer. A plurality of grooves, which serve as air channels, is provided in the contact layer and the intermediate layer impart flexibility to the clamping plate. The clamping plate has sufficient flexibility to adapt to the specified contour of the workpiece. The contact layer is placed against the workpiece and vacuum apparatus provides suction through the air channels, which are in flow communication with each other between the two layers, to hold the workpiece against the clamping plate. One or more seals defines a holding area on the contact layer and prevent loss of suction.