MACHINE FOR GRINDING THE BLADE TIPS OF TURBINES OR COMPRESSOR ROTORS

摘要

The disclosure relates to a grinding machine in which a workpiece (19) such as a multi-stage compressor or turbine rotor to have grinding operations carried out at different locations along the workpiece at different radii and at different angles is mounted between centres on a slideway (12) to present the locations on the workpiece to be ground to a motor driven grinding wheel (43) mounted in a grinding head (20). The grinding head is mounted on a slide (21) to traverse the grinding wheel towards and away from the periphery of the workpiece at a location where the grinding operation is to be carried out and the grinding wheel is mounted on the slide (21) for rotational adjustment by a mechanism about an axis (29) extending tangentially to the periphery of the grinding wheel (43) by a location where the grinding wheel acts on the workpiece for adjustment of the angle of cut of the grinding wheel. Since the grinding wheel turns about the axis when its angle is adjusted, the position of the angle of cut is not otherwise varied by the angular adjustment of the grinding wheel. A control mechanism is provided for enabling the grinding wheel to be accurately pre-set to a number of pre-determined angles to suit the workpiece to be ground.