Patent ID: 6568694
Filing Date: 2003-05-27
Classification: B23B,Y10T

Abstract:
A method of moving a clamped irregular workpiece to an axial centerline of a power chuck on a machine tool comprising:mounting at least two jaw assemblies onto the power chuck, each of the jaw assemblies having a length and comprising: a base jaw; a piston mounted onto the base jaw a connecting block with a cylinder, the connecting block having a cylinder bore disposed around the piston; a swivel insert connected to the connecting block by means of a shoulder bolt with an axis, the swivel insert being rotatable about the axis of the shoulder bolt; and an internal hydraulic system filled with hydraulic oil, the hydraulic system having a check valve; pressurizing the internal hydraulic system of each of the jaw assemblies by clamping the workpiece in the power chuck; actuating the internal hydraulic:system to reduce the length of at least one of the jaw assemblies, thereby moving the clamped workpiece to the axial centerline of the power chuck.