Patent ID: 6322423
Filing Date: 2001-11-27
Classification: B24B

Abstract:
An internal abrasive machine for abrading material from an inner surface of a workpiece, the machine comprising:a hollow casing mounted in a support structure for rotation about a first longitudinal axis, the casing forming a first inner space; lid fixed to a longitudinal end of the casing;a first drive mechanism connected to the casing for rotating the casing and the lid about the first longitudinal axis;a clamp for clamping a workpiece to the lid for rotation therewith about the first longitudinal axis;a housing mounted in the first inner space and forming a cylindrical second space having a second longitudinal axis arranged parallel to and offset from the first longitudinal axis;a shaft mounted in the second inner space, wherein the housing and the shaft are angularly movable relative to one another, the shaft forming a third inner space;a second drive mechanism mounted in the third inner space;a spindle connected to the second drive mechanism and defining a spindle axis extending eccentrically relative to the first longitudinal axis, the spindle being connected to the second drive mechanism to be rotated thereby about the spindle axis;an abrasive tool fixed to an outer end of the spindle for rotation therewith;a third drive mechanism connected to the shaft for displacing the shaft and the spindle in a direction coinciding with the spindle axis into and from the inner surface of the workpiece; anda fourth drive mechanism connected to one of the housing and the shaft for producing relative rotation between the housing and the shaft to angularly displace the spindle in a direction extending laterally relative to the first longitudinal axis for bringing the abrasive tool into contact with the inner surface of the workpiece.