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US 4,376,357 AGranted
Machine tools
AssigneeKeighley Grinders (Machine Tools) Limited
InventorRaymond T. Shackleton
Life of this patent
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AssigneeKeighley Grinders (Machine Tools) Limited
InventorRaymond T. Shackleton
Estimating the term…
The invention relates to a grinding machine in which a workpiece 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 sensors on a slideway to present the locations on the workpiece to be ground to a motor driven grinding wheel mounted in a grinding head. The grinding head is mounted on a slideway 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 for rotational adjustment about an axis extending tangentially to the periphery of the grinding wheel at 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. The grinding wheel head includes a dresser unit for dressing the grinding wheel and a mechanism for moving the grinding wheel into engagement with the dresser unit to dress the wheel and restoring the grinding wheel with compensation for the amount of material removed by the dresser unit from the periphery of the grinding wheel to the position in which the axis about which the wheel head turns lies tangentially to the periphery of the grinding wheel.
A machine tool comprising, means to support and rotate a workpiece about a fixed axis for an operation to be carried out on a peripheral portion of the workpiece, a rotary tool having a peripheral cutting face, a tool carrier on which the tool is mounted, means to feed the tool carrier toward and away from the fixed axis for the tool to act on the workpiece, the means comprising a slideway extending transversely to the fixed axis and a slide on which the tool carrier is mounted and drive means for moving the slide in either direction along the slideway, a pivotal mounting for the rotary tool on the tool carrier, the pivotal mounting being adjustable about a further axis lying tangentially to a circle centered on the fixed axis, the slide having, at the end thereof adjacent the fixed axis, a rotary mounting defining the further axis, the slide having a bearing face, the tool carrier being mounted on the bearing face for sliding movement about the rotary mounting, a lead screw rotatably mounted on the slide and carrying a nut to which the carrier is connected so as to turn the tool carrier with respect to the slide about the further axis to adjust the angle of cut of the rotary tool, means for defining the rotational positions of rotational adjustment of the carrier with respect to the slide about said further axis, said defining means comprising a control member extending parallel to the lead screw and having a plurality of stops spaced apart along the member and an adjustable cam mounted to move with the carrier and engageable with one or other of the stops according to the adjustment of the cam to determine the position to which the tool carrier may be moved, the tool being located on the pivotal mounting so that the further axis extends tangentially to the peripheral cutting face of the tool whereby adjustment of the tool about the further axis does not otherwise displace the circumferential cutting face of the tool at the point where it engages the workpiece.
A machine tool comprising means to support and rotate a workpiece about a fixed axis for an operation to be carried out on a peripheral part of the workpiece at a work station adjacent the workpiece, slide means for supporting the workpiece support means for movement of the workpiece in the direction of said fixed axis to present different locations along the workpiece for operation thereon at the work station, a rotary tool having a peripheral cutting face, a feed slide for the tool, means to feed the slide towards and away from the fixed axis for the tool to act on the workpiece, a tool carrier, means to mount the rotary tool on the tool carrier for rotation of the peripheral cutting face thereof, means to mount the tool carrier on the feed slide for rotational adjustment about a further axis lying tangential to the circle centered on the fixed axis, means to mount the tool for linear adjustment on the tool carrier towards and away from said further axis for bringing the peripheral cutting face of the tool tangential to said further axis whereby adjustment of the tool about the further axis does not otherwise displace the circumferential cutting face of the tool at a point where it engages the workpiece, means to turn the tool carrier about said further axis comprising a lead screw rotatably mounted on the slide carrying a nut to which the tool carrier is connected, and means for defining a plurality of positions of adjustment for the tool carrier to provide a number of differing angles of operation of the tool on the workpiece comprising a control member extending parallel to the lead screw and having a plurality of stops spaced apart along the member and an adjustable cam mounted to move with the carrier and engageable with one or other of the stops according to the adjustment of the cam to determine the position to which the tool carrier may be moved.
Dependencies are inferred from the claim text.