Patent ID: 6053083
Filing Date: 2000-04-25
Classification: B23B,Y10S,Y10T

Abstract:
In a machine for treating the surface of workpiece material at a work station in the machine and which comprises:a first holder for a tool for treating the surface;a device coupled to said holder for driving the holder toward and away from a center of the work station;a workpiece material rotator spindle having a spindle rotational axis;a workpiece material locating spindle rotatable on the spindle axis; anda first linear drive device coupled to one of the spindles for moving the one spindle and the workpiece material toward the other spindle to grip the workpiece material between the rotator spindle and the locating spindle to enable the rotator spindle to rotationally drive the workpiece material for treatment thereof;an improvement comprising:a first positioner associated with the work station and having a chamfered inside edge having an axis colinear with the spindle axis for engaging an outer peripheral edge of the workpiece material to be processed for centering the engaged workpiece material on the spindle axis; anda second positioner associated with the work station and having a chamfered inside edge having an axis colinear with the spindle axis for engaging an outer peripheral edge of the workpiece material to be processed for centering the engaged workpiece material on the spindle axis; andone of said positioners being movable relative to the spindles and toward the other of said positioners to grip the workpiece material between them.