Abstract: A machine learning device of a controller observes, as state variables that express a current state of an environment, feeding amount data indicating a feeding amount per unit cycle of a tool and vibration amount data indicating a vibration amount of a cutting part of the tool when the cutting part of the tool passes through the workpiece. In addition, the machine learning device acquires determination data indicating a propriety determination result of the vibration amount of the cutting part of the tool when the cutting part of the tool passes through the workpiece. Then, the machine learning device learns the feeding amount per unit cycle of the tool when the cutting part of the tool passes through the workpiece in association with the vibration amount data, using the state variables and the determination data.

Abstract: A method and a grinding machine to implement the method includes, in a single clamping, a machine part is ground. The part is clamped on its ends and has an internal recess for grinding. The internal recess is ground with an internal grinding wheel, wherein the part is rotated between a workpiece headstock and a tailstock, and an external contour is ground by means of a grinding wheel. The part is held on the tailstock by a hollow tailstock sleeve, on the end region of the internal recess, and the internal grinding wheel passes through the hollow tailstock sleeve during grinding. In the grinding machine, a separate grinding spindle head carrying the internal grinding wheel can be included in the region of the tailstock, and can be advanced against the peripheral surface of the internal recess by passing through the hollow tailstock sleeve and the hollow center.

Abstract: An in-process diameter measuring apparatus equipped with a function of determining a measurement abnormality of a grinding machine is provided. The apparatus measures the diameter of a to-be-processed surface of a workpiece in the process of the workpiece. A sizing device (2) is provided including measuring heads (2X and 2Y) for detecting two locations spaced apart from each other in a diametric direction of the workpiece (W). Based on respective measured values of those measuring heads (2X and 2Y), the diametric dimension is calculated by a dimension calculator (32). With respect to the abnormality detection, the difference between the measured values (G1 and G2) of the measuring heads (2X and 2Y) is determined by a measurement abnormality determiner (34) and the occurrence of the measurement abnormality is determined when this measurement value difference (??) depart from a predetermined permissible range.

Abstract: The present invention discloses a method for producing a golf club head with an ultra-thin crown, relating to a method for processing a golf club head. A grinding rotor, with an abrasive (2) on the surface, is placed in a to-be-grinded area inside a cavity of the golf club head (1). The outside of the golf club head (1) is provided with a rotary working shaft (6) of high-speed rotation, one end of which corresponding to the grinding rotor is provided with driving magnets (4). The driving magnets of the rotary working shaft (6) are driven by a driving device to make the grinding rotor rotate synchronously so that the grinding rotor that is rotating performs multi-point thinning and grinding to the cavity within the to-be-grinded area of the golf club head (1). The present invention, with advantages of uniform thinning of a golf club head and automation control, is applicable to mass industrial production.

Abstract: In the case of a method for the material-removing fine machining of a workpiece surface of a workpiece, in particular for the honing or finishing of workpiece portions having substantially rotationally symmetrically curved workpiece surfaces, at least one fine machining tool machines the workpiece surface and, by means of a measuring system, a measurement of the workpiece surface is performed. In this case, at at least one measuring position, radar radiation is directed onto the workpiece surface, and the radar radiation reflected from the workpiece surface is acquired and evaluated for the purpose of determining at least one surface measurement value.

Abstract: An improved grinding arrangement for grinding a required profile in a body is provided. The arrangement includes a body having at least one channel extending into the body and a grinding wheel adapted to grind the required profile in the side of the channel. In the setup the grinding wheel is arranged so that an axis of rotation of the grinding wheel forms an angle greater than 0° with a radial axis of the channel. A method of grinding a required profile in a body is also provided.

Abstract: The machining device is for machining the material of a pipe system that has a joint area between a pipe that has a smaller inner diameter and a pipe that has a larger inner diameter. The device has protruding parts that have been adapted to position the device inside the pipe that has the smaller diameter. A steerable actuator is adapted for removing material from the joint area and steering device for controlling the direction of the machining device in relation to the longitudinal axis of the pipe that has the smaller inner diameter while removing material from the joint area. The method is for machining material of the joint area that has a thinner and a thicker pipe.

Abstract: The invention concerns a polishing arrangement (1) with a tool holder (3), at which a polishing tool is arranged and that interacts with a workpiece holder (5), the workpiece holder (5) and the tool holder (3) being movable in relation to one another in a first direction and in a second direction differing from the first direction. It is endeavored to make at least a part of the polishing process reproducible and documentable. For this purpose, in a third direction (20) that is perpendicular to the first (9) and second (10, 12) directions, the tool holder (3) is made to be flexible.

Abstract: An inner surface grinding tool is provided with a plurality of machining units for simultaneously machining inner surfaces of a plurality of portions of a workpiece. The plurality of machining units respectively include expanding and contracting mechanisms and grinding blade portions. In the respective machining units, outer diameters of the respective grinding blade portions are capable of individually expanding and contracting by the respective expanding and contracting mechanisms.

Abstract: Disclosed is a method for grinding a machine part that is used as a drive shaft, for example, rotates about the longitudinal axis thereof during the grinding process, and is provided with a journal at one axial end thereof and a recess at the opposite end thereof. The grinding process is carried out in one and the same grinding machine. In said grinding method, the machine part is brought into different clamped states by means of a chuck of a workpiece spindle head with releasable clamping jaws and a centering tip, a backrest, and/or a tailstock quill. Changing the clamped states has the advantage that the machine part remains in the same position in a single grinding machine, i.e. the clamped position, in all the different clamped states such that more accurate sizes, shapes, and positions can be obtained in an economical manner and all areas of the machine part which are to be ground are successively accessible to the grinding disks.

Abstract: The invention relates to a machine for creating non-cylindrical bore surfaces having a machine spindle (5), to which a machining tool (2-06, 3-04) can be connected, onto which a feed movement is transferred via a feed means (1-10). A direct axially parallel acting linear drive (1-06) is provided in the tool fitting unit (1) associated with the machine spindle (5) for fine feeding, the feed movement of which overlaps the first mentioned feed movement, and the actuating means (1-05) of which acts upon a feed (1-03) that is disposed together with the machining tool (2-05, 3-04) and the means for deflection (1-031, 1-032) of the feed movement in a tool unit (2, 3) that can be exchanged on the tool fitting unit (1).

Abstract: The honing feed system and method utilizes feedback from various sources during rapid feeding of the honing tool while rotating and stroking, to detect initial contact with a bore surface, to slow the feed to a normal honing rate, involving conditioning the feedback signals to eliminate noise factors such as the stroking movement and forces generated to rotate and feed the tool unopposed.

Abstract: An exemplary grinding device includes a fixed barrel, a rotatable barrel, a grinding plate, an actuator and a cleaning assembly. The fixed barrel defines a chamber and includes a number of inner sidewall substantially parallel to a central axis, each of which defines a holding groove for holding a workpiece. The rotatable barrel is received in the chamber and includes an outer side substantially parallel to the central axis and defines an installation groove. The grinding plate is installed in each of the installation grooves. The actuator is configured for driving the rotatable barrel to rotate and simultaneously move up and down in the first chamber, such that the grinding plates contact the workpieces and grind the workpieces. The cleaning assembly is situated under the fixed barrel for cleaning the workpieces.

Abstract: A grinding device includes a fixed barrel, a moving barrel, a grinding plate, and an actuator. The fixed barrel defines a chamber and includes a number of inner surfaces substantially parallel to a central axis, each of which defines a holding groove therein for holding a workpiece. The moving barrel is received in the chamber and includes a side surface substantially parallel to the central axis and defines an installation groove. The grinding plate is fixedly installed in the installation groove. The actuator is configured for driving the moving barrel to spin and move back and forth along the central axis, and driving the moving barrel to move towards a workpiece so that a surface of the workpiece is grinded into a desired arc surface by the grinding plate, and driving the moving barrel to move towards another workpiece after the desired arc surface of the workpiece is obtained.

Abstract: An internal gear machining method and an internal gear machining device, are provided for grinding of a tooth profile of an internal gear using a barrel-shaped threaded grinding wheel. An NC device functions as a tooth profile error correction means and reduces a measured pressure angle error of a workpiece at a tooth face by correcting the radial position, the lateral position of the grinding wheel, the turning angle of the grinding wheel, and the helical motion; reduces a measured error in the direction of a tooth trace of the workpiece at a tooth face by correcting the helical motion; and reduces a measured tooth thickness error of the workpiece at a tooth face by correcting the radial position, the lateral position of the grinding wheel, and the helical motion.

Abstract: A grindstone contact sensing technology capable of sensing the contact position of the honing grindstone with the inner circumference of the work at high precision. A servo motor for driving the spindle rotation, and a servo motor for driving the depth of cut are provided and used respectively as spindle rotation drive source for rotating and driving the rotary spindle having the honing tool and depth-of-cut drive source for moving the honing grindstone at a specified depth of cut, and the contact position of the honing grindstone with the inner circumference of the work is sensed from various electrical information (rotating speed, torque, current value, stagnant pulses, etc.) obtained from the operations of both the servo motors.

Abstract: The method of the invention provides a capability for accurately and uniformly determining the sizes of bores of workpieces, both pre- and post-process, to improve process control, particularly compensation for tool or stone wear and other factors, and process data collection. The present method makes all required bore measurements, including those in both the workpiece bore and the calibration ring or sample workpiece bore, with the honing tool, under controlled static, non-honing conditions, including expanding the tool in the bores in a predetermined manner, such as at a predetermined rate. The method of the invention has utility for honing multiple workpieces to a finished size with a single tool, and also for multiple spindle applications.

Abstract: A machining apparatus, in which a plurality of user set programs in relation to one axis is written and the amount of the infeed motion of the grinding wheel is increased to restrain the change of the load of the grinding wheel, improves a machining accuracy and achieve a longer life of the grinding wheel.

Abstract: The invention relates to a machine for creating non-cylindrical bore surfaces having a machine spindle (5), to which a machining tool (2-06, 3-04) can be connected, onto which a feed movement is transferred via a feed means (1-10). A direct axially parallel acting linear drive (1-06) is provided in the tool fitting unit (1) associated with the machine spindle (5) for fine feeding, the feed movement of which overlaps the first mentioned feed movement, and the actuating means (1-05) of which acts upon a feed (1-03) that is disposed together with the machining tool (2-05, 3-04) and the means for deflection (1-031, 1-032) of the feed movement in a tool unit (2, 3) that can be exchanged on the tool fitting unit (1).

Abstract: A processing cell of automatic machining system configured in that it is easy to decide or change the number of steps and to design, and to reduce the installation cost. The control unit of the processing cell comprises an operation data storing means for storing every position necessary data for operation at each position of the processing cell installed in the machining section of the automatic machining system, and a position designating means for designating the after-installation position. The control unit reads necessary data for operation out of the operation data storing means in accordance with the position designated by the position designating means. Thus, the operation of each cell can be switched in accordance with the position, and the processing cells can be easily changed in position and adjusted in quantity.

Abstract: The feed system for a honing machine provides a capability to dynamically correct in real time errors in bore size inferred arising from variations in feed force, and a method of operation of the same. The system allows a user to select between rate and force controlled honing modes, which provides one or more of the advantages of both modes. The system provides capabilities for automatic rapid automatic bore wall detection, compensation for elasticity of elements of the feed system and honing tool, and automatic tool protection. The system is automatically operable using feed force, feed rate and positional information for honing a work piece to one or more target parameters, such as one or more in-process sizes and a final size.

Abstract: The feed system (30) for a honing machine (10) provides a capability to dynamically correct in real time errors in bore size inferred arising from variations in feed force, and a method of operation of the same. The system (10) allows a user to select between rate and force controlled honing modes, which provides one or more of the advantages of both modes. The system provides capabilities for automatic rapid automatic bore wall detection, compensation for elasticity of elements of the feed system (30) and honing tool (14), and automatic tool protection. The system is automatically operable using feed force, feed rate and positional information for honing a work piece (20) to one or more target parameters, such as one or more in-process sizes and a final size.

Abstract: A processing cell of automatic machining system configured in that it is easy to decide or change the number of steps and to design, and to reduce the installation cost. The control unit of the processing cell comprises an operation data storing means for storing every position necessary data for operation at each position of the processing cell installed in the machining section of the automatic machining system, and a position designating means for designating the after-installation position. The control unit reads necessary data for operation out of the operation data storing means in accordance with the position designated by the position designating means. Thus, the operation of each cell can be switched in accordance with the position, and the processing cells can be easily changed in position and adjusted in quantity.

Abstract: A conditioner including abrasive elements for conditioning a polishing pad to be used in abrasive semiconductor substrate treatment processes, such as chemical-mechanical polishing or chemical-mechanical planarization processes. The abrasive elements are formed from a material that may be degraded or dissolved by at least one chemical that will not substantially degrade or dissolve a material of the polishing pad. The abrasive elements of the conditioner may be degraded or dissolved in at least one chemical that will not substantially degrade or dissolve a material of the polishing pad. Any residue or particles of, or from, the abrasive elements that stick to or become embedded in the polishing pad are removed therefrom by exposing the polishing pad to the at least one chemical so as to degrade or dissolve the residue or particles without substantially degrading or dissolving a material of the polishing pad.

Abstract: A honing method proposes that using an arbor honing tool a remachining be carried out using the same tool either simultaneously or following onto arbor honing, in which the ratio of the stroke speed to the rotational speed of the tool is significantly increased. This leads to a cross-structure of the honing tracks allowing a better oil holding capacity.

Abstract: A grinding pin (53) for grinding notches in the edges of disc workpieces, such as semi-conductor wafers, comprises a metal spindle (132) for mounting in a grinding machine, and an adjoining cylindrical region having axially spaced sections of fine grit (160) and rough grit (162), the latter being axially nearer the spindle (132). In use on a grinding machine having a rotatable forming wheel, similar profiled notch-grinding grooves (140) and (142) are formed by the wheel in the grinding sections (162) and (160) respectively.

Abstract: The present invention provides a method and an apparatus for surface treatment to polish and wash with high accuracy the inner surface of a member having complicated internal configuration. A magnet 23 is arranged on outer side of a member 1, which is made of a nonmagnetic material and for which surface treatment is to be performed on inner surface. Magnetic grains and abrasive grains in slurry state are supplied to inner surface of the member. At least one of the member 1 and the magnet 23 is rotated and are relatively moved in axial direction at the same time.

Abstract: In a method of grinding side end surfaces of substrates, spacers are interposed between the substrates to form a stack of the substrates and the spacers. The spacers are slightly smaller in size than the substrates. The stack of the substrates and the spacers are ground by a rotatable brush or pad on the side end surfaces of the substrates so as to smooth chamfered portions of the substrates together with the side end surfaces.

Abstract: For the working of walls which bound the cavity of a continuous casting mold, a machine is used which incorporates machining and/or polishing tools. The machine consists of a machine tool table with an arm introducible into the cavity for the supporting of the tools and a table for the clamping of the mold, as well as devices for generating a numerically controlled relative movement between the tools and the walls. In order to obtain a high accuracy in the working also in the case of a cavity with a conicity varying in longitudinal direction and/or along the peripheral line of a cross-section or in the case of a cavity with special corner configurations, it is proposed that a rotational movement of the tools about axes which are arranged substantially obliquely to the longitudinal axis of the arm be combined with a swivelling movement of the arm about its longitudinal axis.

Abstract: An ultra high pressure abrasive waterjet cutting apparatus for cutting nuclear reactor structural components is described. The cutting apparatus includes an ultra high pressure abrasive waterjet (UHP) cutting nozzle, movably coupled to a single axis manipulator, and a collection hood. The manipulator and the collection hood are coupled to a support frame and are configured to be positioned inside adjacent openings of a nuclear reactor top guide or core plate so that the cutting nozzle is in alignment with the collection hood. The manipulator includes a linear frame, a nozzle support plate movably coupled to the linear frame, and a motor operatively coupled to the nozzle support plate. The collection hood includes an elongate collection chamber having an elongate opening located so that the opening is in alignment with the cutting nozzle.

Abstract: A honing method proposes that using an arbor honing tool a remachining be carried out using the same tool either simultaneously or following onto arbor honing, in which the ratio of the stroke speed to the rotational speed of the tool is significantly increased. This leads to a cross-structure of the honing tracks allowing a better oil holding capacity.

Abstract: Machine for machining an envelope surface of a cylindrical work piece includes a tubular cylindrical housing with a longitudinal axis and having an inner space extending from a first end of the housing, and with an axis offset from the housing axis, a shaft angularly displaceable in the inner space and provided with a recess, and a motor in the recess. A spindle is coupled to the motor and carries a first rotatable tool, a rotatable outer casing encloses the housing, and a lid is arranged for co-rotation with the casing and extends radially over the first end of housing with the lid having a central through opening with the peripheral surface. A second rotated tool is disposed on the peripheral surface, and a support device is adapted to hold the work piece between the tools. The shaft is arranged to cause the first tool to effect radial displacement relative to the second rotated tool.

Abstract: A method for the production of medical fittings, in particular dental fittings, is proposed. A workpiece (1), from which the fitting is produced, has material removed from it by machining with a tool (7). The tool (7) and the workpiece (1) execute a relative movement with respect to each other along a fixed trajectory. The instantaneous loading of the tool is used to control the speed of this relative movement. In order to avoid the load peaks which occur here, and to ensure a more uniform control, it is proposed that the expected loading of the tool along the trajectory is also calculated and is used to control the speed.

Abstract: A method of grinding the bore of a rotary spindle, the bore having a taper, to true the bore while the spindle rotates about a spindle axis, the steps that include providing a support attachable to a base associated with the spindle; providing an angled slide on the support, the slide being movable endwise relative to the spindle and at a predetermined angle to the spindle axis, that angle corresponding to the spindle bore taper; providing a rotary grinder on the angled slide to be movable endwise therewith while the grinder rotates, bodily adjusting the spindle to bring the spindle bore into position to be ground by a grinder as the grinder is moved on the angled slide relative to the bore, and as the spindle rotates; and operating the grinder to grind the tapered bore as the spindle is rotated and as the angled slide is moved endwise, at a predetermined angle.

Abstract: An internal abrasive machine abrades material from an inner surface of a workpiece. The machine includes a casing rotated about a first axis, with a workpiece rotated therewith about the first axis. A housing is disposed coaxially inside of the casing, and a shaft is mounted eccentrically in the housing. The casing and housing are angularly movable relative to one another. A drivable spindle is mounted in the shaft, the spindle carrying an abrasive tool. The spindle is offset eccentrically with respect to the first axis and carries an abrasive tool disposed inside the workpiece. A motor is provided to produce relative angular movement between the housing and the shaft to displace the spindle laterally with respect to the first axis and into contact with the inner surface of the workpiece.

Abstract: When honing working cylinders for reciprocating piston-type machines or engines, e.g. internal combustion engines, unlike in conventional honing methods working takes place with a much higher axial speed than circumferential speed. This gives a mark pattern, which admittedly differs significantly from the axial direction, but runs more in the axial direction than in the circumferential direction. On the dominant mark pattern can be superimposed in a finishing operation a honing mark pattern, which has much finer honing marks and creates a plateau surface with diamond-shaped islands pointing in the working direction of the piston. A thus treated working cylinder, in the case of limited wear, leads to much lower oil consumption on the part of the engines.

Abstract: An apparatus for blast cleaning a generally vertical surface is disclosed. The device features a blast cabinet containing a blast wheel rotatably mounted about a horizontal axis. The blast wheel is positioned adjacent to an opening in the cabinet through which it propels abrasive material against the vertical surface being cleaned. Rebounding abrasive again contacts the rotating blast wheel. This contact deflects the particulate through a rebound corridor, to the side and into-a filter. The abrasive then falls into a storage hopper for reuse. A conveyor is rotatably mounted so as to catch leaked particulate matter. The conveyor features a pair of opposing feed screws that meet in the middle of the conveyor so that leaked particulate matter is projected up to the blast wheel in a manner similar to a water fountain. The particulate matter is then propelled by the blast wheel to the rebound corridor.

Abstract: The combined grinding machine for internal spline includes three grinding heads for processing a bore of internal spline parts. The machine clamps a workpiece and at the same time can finish grind during the bore and spline operation and boring one of its end faces. The machine has a grinding head for boring and grinding head for a side boring a spline installed in a main sliding plate which moves on a vertical shaft of the machine body. The machine has a rotary table installed in a removable working table driven by a motor unit. Both the working table and the grinding head for the spline end face are located in the machine body. The machine demonstrates high efficiency, high precision, and low equipment investment. The machine saves time for aligning and clamping procedures.

Abstract: An annular workpiece having an inner peripheral surface and an outer peripheral surface at least one of which is centered on a workpiece axis is ground by supporting the workpiece hydraulically on a liquid layer in a support for rotation about the axis, rotating the workpiece about the axis, and engaging a grinding tool radially against the one surface and thereby removing material from the one surface. A plurality of measuring shoes are supported at angularly equispaced locations about the axis and are urged radially toward the one surface. A jet of liquid is projected from each of the shoes against the one surface such that the liquid forms a layer supporting the shoes on the one surface and merges with the liquid supporting the workpiece. The radial positions of the shoes are monitored relative to the axis and the removal of material from the one surface by the grinding tool is controlled, either by varying grinding force or stopping grinding altogether, in accordance with the monitored radial positions.

Abstract: Device for centering and clamping a component (1) with a view to lapping it, comprising a rest (10) for applying the component (1) against a fixed stop (3), a first piston (7) with a long stroke and a second piston (8) with a short stroke interposed between the rest (10) and the first piston (7), anti-rotation means (18) for the component (1), a blocking element (12) for blocking the first piston (7) relative to its cylinder (6), as desired, and controls for, in succession,a)--advancing the two pistons (7, 8) in order to clamp the component (1),b)--blocking the first piston (7) relative to its cylinder (6) using the blocking element (12),c)--retracting the second piston (8) in order to unclamp the component (1),d)--introducing the lap (4) into the component (1) immobilized by the anti-rotation means (18) and, driving it in rotation, expanding the lap (4) until a pre-determined torque is established between the lap (4) and the component (1) ande)--advancing the second piston (8) in order to reclamp the centere

Abstract: A carriage 3 is movable in a feed direction A on guideways 1, and carries an ultrasonic machining device 4, 5 loaded with an adjustable force in the feed direction by a first fluid cylinder 7. A cylinder 15 is attached to the carriage, around which is looped 16 a rope 17. One end 18 of the rope is preloaded by spring 20 against a stop 21 which is attached to a frame 2. The other end 22 of the rope is attached to the piston rod 24 of a second cylinder 25. By means of the second cylinder the tool 5 can be lifted or retracted from the workpiece 6 during the machining operation, independently of the position of the carriage. After the tool has been lifted off, the tool touches down gently again on a renewed abrasive layer.

Abstract: A centerless grinding machine comprises a stationary disk, a following disk, and a shoe, which cooperate to hold and rotate a workpiece. The following disk is mechanically loaded to the bias towards the stationary disk and the shoe so that the workpiece is secured between an outer circumference of the disks and the shoe. A diameter detector detects an outside diameter of the workpiece by detecting a displacement of the following disk by the workpiece. From this information, a controller controls an X-Z grinder to grind an inner surface of the workpiece. This grinding is in response to the outside detector detected by the diameter detector. As a result, the inner diameter can be machines to closer tolerances than are available in the outer diameter.

Abstract: A cutter robot used to operate in a horizontal pipe having a horizontally extending main body, a stand gear to support the main body aloft, and a head bearing a rotary grinder assembly, and this head consists of: (i) a motor having an upward output shaft to bear the grinder assembly locked about its end, (ii) two holders, and (iii) two vertically held piston cylinders, which are arranged such that the first piston cylinder connected to the main body has an upward piston rod, and the first holder means supported at the end of the upward piston rod of the first piston cylinder holds the second piston cylinder, and the second holder means supported at the end of the downward piston rod of the second piston cylinder holds the motor.

Abstract: An automatic honing apparatus for honing the internal surface of a cylindrical member has a wheel member for tightening the honing stones against the internal surface. A brake assembly is associated with the wheel member, and when activated contacts the wheel member and when de-activated releases the wheel member. A sensing device detects the load on a first motor and activates or de-activates the brake assembly in response to preset motor load values. As the load on the first motor increases and decreases, the sensing device cycles the brake on and off to tighten the honing stones. A second motor drives a carriage assembly forward and backward to run the honing stones in and out of the cylindrical member to hone the entire internal surface of the cylindrical member.

Abstract: The present invention provides a hybrid lens having an axially asymmetrical non-spherical shape, good mass productivity, and excellent shape precision surface precision as well as environment resistant property, and a method for fabricating same, as well as a method and a device for a laser printer using that hybrid lens. In particular, there are disclosed a method, by which, when an axially asymmetrical non-spherical convex lens is formed by the replica method, the shape thereof is transcribed with a high precision, as well as a method and a device for fabricating an axially asymmetrical non-spherical concave lens (female die) serving as an original for the transcription. In a device for fabricating a female die by direct grinding, the positions of a rotation axis of an object to be worked and a rotation axis of a grinding wheel are controlled and it has further a function of correcting mounting errors, when the object to be worked and the grinding wheel are mounted.

Abstract: A machine for regrinding components of a constant velocity universal joint is disclosed. The machine contains (1) a chuck mechanism and an adaptor for mounting a component in the chuck mechanism, (2) a grinding bit comprised of a grinding tip, an arbor, and means for removably attaching the grinding tip to the arbor, (3) a rotatable support means for supporting the chuck mechanism, (4) a high speed spindle, (5) a means for adjusting the position of the spindle in the Y axis to move the spindle in and out, (6) means for injecting nonaqueous lubricant onto the grinding bit, and (7) means for purifying contaminated nonaqueous lubricant.