Abstract: The invention covers a method and a mechanism for the simultaneous machining of profile sections of one and the same work piece by two grinding wheels. Acc. to the method first the finish-grinding positions of the two grinding wheels (4.1 and 4.2) are calculated. After moving the two grinding wheels (4.1 and 4.2) into these positions these two grinding wheels (4.1 and 4.2) are profiled by the dressing tool (1) to generate a surface/roughness suitable for rough-grinding. Then the two grinding wheels (4.1 and 4.2) are moved into the calculated rough-grinding positions and then this operation takes place. Then the two grinding wheels (4.1 and 4.2) are moved into the finish-grinding positions followed by dressing to generate the surface/roughness for finish grinding. Acc. to the mechanism the grinding slides (14.1 and 14.2) are arranged in such a way that the two grinding wheels (4.1 and 4.2) have a common axis of rotation (15).

Abstract: In a floor-surface polisher in which floor-surface is polished by a pad which is mounted within a pad cover and rotated at a high speed by a motor during the traveling operation of the polisher, a floor-surface polisher equipped with a function for adjusting a pad pressure being characterized in that the pad is resiliently supported by a support force, the support force directing upwardly to separate the pad away from the floor-surface, a plurality of very small spaces being formed within the pad so that a drawing force for lowering the pad toward the floor-surface against the upwardly-directing support force will be generated during a high speed rotation of the pad, electric-current value setter for adjusting, either automatically or manually, an electric-current value of the motor to a pre-set value, the setter being mounted on a control portion of the pad motor.

Abstract: Method to hone curved and shaped profiles which belong to furniture elements, which are advantageously of furniture of an antique style, such as surfaces of tables, mouldings of furniture or pictures, panels, doors of kitchen cupboards, seat elements, etc.

Abstract: It is an object of the present invention to provide an apparatus and a method for manufacturing a wafer, which are the most suitable for meeting the requirement for the mirror grinding surface of the wafer's chamfering portion. As a result, when the ingot is sliced, a wafer being sliced is chamfered at the same time. And, it is also possible that before the ingot starts to be sliced by the blade, the grindstone is pressed against the outer periphery of the slicing position to form a V-shaped groove along the outer periphery of the slicing position, so that the chamfering can be performed.

Abstract: A method and apparatus for initially taking an individual bar from a supply of bars and placing it on an entry conveyor while preventing movement of the remaining bars. Other mechanisms are provided for adjusting the entry conveyor to accommodate the diameter of the bars to be ground. The individual bars to be ground are initially moved into position between a regulating wheel and a grinding wheel. The regulating wheel maintains the bar against the grinding wheel and the movement of the regulating wheel toward the grinding wheel during the grinding action is sensed by an encoder device. The encoder device in turn signals to a servomotor to move the grinding wheel an amount equal to but in the opposite direction to the regulating wheel to compensate for the wearing of the grinding wheel. The regulating wheel is set at a slight angle relative to the bar to impose a vector force that moves the bar through the grinding station to the exit conveyor from where the bar is subsequently moved to a holding area.

Abstract: A method of manufacturing a distal femoral knee prosthesis includes the initial step of forming a rough prosthesis workpiece member that has the approximate size and shape of a final polished distal femoral prosthesis. The rough prosthesis workpiece member can be a casting, forging or a rough machined part. The prosthesis member is then attached to a fixator and movably supported adjacent a rotary grinder. Relative motion between the rotary grinder and the prosthesis is controlled with a computer. An articular surface of the prosthesis is shaped by engaging the prosthesis with the rotary grinder. The workpiece is primarily polished to remove "scallops" that form on the outer surface during a shaping with the rotary grinder. The prosthesis workpiece member is then secondarily polished until the articular surface provides a highly polished mirror finish.

Abstract: A pneumatic mechanism for the application of uniform pressure to a mechanically adjustable spindle. The mechanism includes a support shelf with a double-acting piston attached at its non-pressure end to the support shaft. A cylinder receives the piston for telescopingly sliding movement of the piston relative to the cylinder. A lifting stop rod is connected to the pressure end of the piston and an externally threaded tube engages the pressure end of the piston and telescopingly receives the lifting stop rod. A worm wheel engages the threaded tube and a worm gear engages the worm wheel. A hand wheel is connected to the worm gear for rotating the worm gear and the worm wheel. An adjustable connection is provided between the lifting stop rod and the threaded tube permitting limited stop movement of the lifting stop rod by the piston relative to the threaded tube.

Abstract: An apparatus for grinding a workpiece while electrolytically dressing an electrically conductive grinding wheel. The apparatus has an electrically conductive grinding wheel with a contact surface for contacting the workpiece, an electrode opposed to the grinding wheel and spaced a distance therefrom, a nozzle for supplying conductive fluid between the grinding wheel and the electrode, and a device for applying a voltage between the grinding wheel and the electrode. An eddy current sensor is arranged in proximity to the working surface of the grinding wheel for measuring the position of the grinding wheel in a non-contact manner. A grinding wheel controlling device is provided for controlling the position of the grinding wheel based on the values measured by the eddy current sensor.

Abstract: A grinding wheel for grinding a workpiece has a first grinding surface and a second grinding surface successive thereto. The first and second grinding surfaces are parallel to and inclined with respect to the rotational axis of the workpiece, respectively. A diameter of the workpiece to be ground in a next grinding operation is measured in advance. An angle to be formed between the second grinding surface and the rotational axis of the workpiece is selected based upon the measured diameter of the workpiece. The selected angle is established between the second grinding surface and the rotational axis of the workpiece. The grinding wheel is moved relative to the workpiece in a direction of the rotational axis of the workpiece, whereby the cylindrical surface of the workpiece is firstly ground by the second grinding surface and subsequently ground by the first grinding surface of the grinding wheel.

Abstract: A system for polishing a semiconductor wafer includes a rotatable platen subassembly and a drive mechanism coupled to rotate the platen subassembly at a platen velocity. A polishing head supports and holds a face of the semiconductor wafer in contact with the platen subassembly to polish the wafer face whereby individual regions of the wafer face have different polishing rates. The polishing head includes pressure applicators for applying various localized pressures on the individual regions of the semiconductor wafer to conform the wafer face to a selected contour. The system also includes a polish control subsystem for monitoring in situ the polishing rates at various regions of the semiconductor wafer. The polish control subsystem adjusts in situ the platen velocity and/or the individual localized pressures applied to the semiconductor wafer to change the polishing rates of the individual regions of the semiconductor wafer.

Abstract: A grinding wheel wear compensator for determining a correct position for a grinding wheel that wears in grinding operation performed on a workpiece so that high grinding accuracy can be ensured.In the grinding wheel wear compensator, in accordance with a desired grinding pattern, a tool centre determining unit determines a tool centre point from a two-dimensional section of the grinding wheel, the section being cut off in an axial direction of the grinding wheel so as to pass its rotary axis and detected by a section detecting unit. Based on the positional difference between the tool centre point determined and a reference point, a wear correction value calculating unit calculates a wear correction value to be used for determining the correct position for the grinding wheel.

Abstract: Relates to the automatic operation and control of a surface treating device having a powered tool and a work wheel for engagement with a work piece, said device being carried on a robotic arm and being adapted to maintain a uniform pressure of engagement of said work wheel with a work piece and a uniform rate of speed of the working surface of said work wheel in its engagement with the work piece, and a balancing pressure applied to said powered tool and work wheel to in effect make them weightless for their precise control.

Abstract: This disclosure relates to a belt grinding machine that can be used to grind rubber belts containing special fiber(s) without causing troubles due to wear or clogging of the grinding wheel. A belt driving mechanism including rolls and for carrying a belt over them, a grinding wheel including a rotary driving means and a reciprocating means, and a rotary dresser for dressing the surface of the grinding wheel are arranged in this order in a direction perpendicular to the axes of the rolls, grinding wheel and rotary dresser all set in parallel to each other.

Abstract: A machine for the deburring of tubular parts made from cast iron, provides a carousel upon which a deburred part is unloaded and at least one part to be deburred is loaded. Between two deburring operations, the position of at least one active point of the grinding wheel is measured by a sensor, and, after having thus measured the position of a number of points, the trajectory of the grinding wheel corresponding to the grinding wheel profile, as defined by these points, is calculated. The grinding wheel is provided to be movable, based on its profile and trajectory.

Abstract: Disclosed herein is a method of truing and angling the blades of a form-relieved face mill cutter during the blade sharpening process thus eliminating a separate time-consuming procedure for truing and angling. The position of the cutting edge of each blade is determined and a reference blade is selected. The sharpening plane of each remaining cutting blade is repositioned, if needed, such that after removing stock material from the blades in accordance with the newly repositioned sharpening plane, the cutting edge of each blade will follow essentially the same path when the cutter is rotated about its axis.

Abstract: A machine tool having a grinding wheel for grinding a workpiece mounted on a table. The machine tool is provided with a truing apparatus for truing the grinding wheel and a measuring device for measuring the diameter of the grinding wheel after every truing operation. Both of the truing apparatus and the measuring device are mounted on a movable base. The movable base is moved between its retract position at the outside of the table and a forward position above the table. The movable base is move to the forward position to bring the truing apparatus and the touch sensor into predetermined positions for truing and measuring operations. After the truing and measuring operations, the movable base is moved away from the table and is retracted to its retract position. The truing apparatus is provided with a truer support shaft whose rotational shaft intersects with a horizontal plane with an angle of 45.degree., and a truer attached to the truer support shaft.

Abstract: An automatic surface treating work wheel having controlled speed and pressure for finishing the surfaces of various materials to achieve desired finish results. The pressure is controlled by a counterbalance system using two air pressurized pneumatic cylinders.