CLAMPING DEVICE FOR FORGING PIECES ON FORGING MANIPULATORS.

摘要

A forging manipulator has two pairs of workpiece gripping arms which operate in respective mutually perpendicular planes. Each pair of arms is operable by a respective independent actuating mechanism, so that the respective pairs of arms can accommodate workpiece dimensions. The two actuating mechanisms comprise: a common bore in the gripper carrier of the manipulator, defining two co-axial fluid pressure cylinder disposed end to end, a respective annular piston in each of these cylinders, a respective hollow piston rod extending from each piston towards the gripper arms, one of these piston rods extending within the other piston rod, and a respective wedge at the forward end of each piston rod, for operating the corresponding pair of gripper arms on movement of the piston rod. The wedges slope in opposite directions, and the pistons move simultaneously in opposite directions. This provides a very compact construction and allows material and tools to be delivered to and removed from the manipulator from the rear through the hollow piston rods.