| 摘要 |
A machine including a system for moving one member into engagement with another and to apply a high clamping force thereto. The system includes an electrically operated pump and an associated cylinder assembly. The cylinder assembly includes a housing having first and second chambers, each having actuating fluid therein. A piston is located within the housing and is coupled to one member. A ballscrew and associated nut are located within the housing coupled to the piston and arranged to move the piston in either of two opposite directions under power from an externally located electrical servomotor. When the piston is moved in one direction it carries the associated member into engagement with the other member and also causes actuating fluid to flow from the second chamber into the first chamber. The pump is arranged to provide additional actuating fluid to the first chamber for applying a clamping force directly to the piston, and not to the ball screw and nut. Controllable valves are provided to ensure proper operation of the system. |
