Even if the inner diameter of the work varies, by performing constant pressure control, there is no variation depending on the operator, and the clamp can be clamped with the same gripping force. In addition, the degree of deformation of the work can be made common.
Using elastic deformation by static hydraulic, the shell of hydraulic tool will be expand and clamp workpiece by equal clamping force. In order to control minimum clamping force, clamping force measurement is started from clamping point.Thus,it’s possible to use for process or measurement which workpiece deform.
