Abstract: A method for the production of a dental object (1) by grinding a blank (2) made of ceramic or a ceramic-plastic composite material, wherein, for the production of a preform (3) having an outer contour (4) that differs from a final outer contour (5) of the dental object (1) to be produced, a grinding channel (8) is machined into the blank (2) or into a pre-preform (9) already made from the blank (2), in at least one grinding process using a grinding tool (6) of a grinding device (7), wherein the outer contour (4) of the preform (3) is formed with the grinding channel (8) on one edge (10) thereof, and on the edge (11) of the grinding channel (8) opposing the outer contour (4) of the preform (3), at least one remaining piece (12) is removed from the blank (2) or from the pre-preform (9) at least in sections.

Abstract: In a power steering device equipped with a rack shaft constructed by joining a first member having rack teeth and a second member serving as a ball screw shaft on which a ball screw groove is formed, a grinding process of the ball screw groove is performed on the second member by causing a grindstone to rotate and move along a rotation axis of the second member, while causing the second member to rotate about an axis of the second member as the rotation axis. The grinding process is performed so as to satisfy a specified machining condition “g/(5×p)<w<g/p”, where w is a rotational speed of the second member during grinding of the ball screw groove, g is a rotational speed of the grindstone during grinding of the ball screw groove, and p is a circumferential length of one circumference of the ball screw groove around the rotation axis.

Abstract: An example torque controlled actuator includes a frame, and one or more timing belt stages coupled in serial on the frame. The timing belt stages include an input stage for coupling to a motor and an output stage for coupling to a load, and the timing belt stages couple rotation of the motor to rotation of an output of the output stage. The torque controlled actuator also includes one or more belt idlers coupled to the frame that contact a timing belt of the output stage, and a strain gauge coupled to the frame to determine a tension of the timing belt of the output stage based on force applied by the timing belt of the output stage to the one or more belt idlers.

Abstract: Methods and devices coat, at least regions of, a medical implant, preferably of an artificial joint or a fixation for a joint. The method provides a medical implant, fills a device with a liquid having at least one pharmaceutically active substance, wherein the device has a compressed, at least over regions thereof, elastic, porous transfer means increases a volume of the transfer means, whereby the liquid is taken up at least partly into the pores of the transfer means, and transfers the liquid from the transfer means to a medical implant surface to be coated. The device coats, at least regions of, a medical implant, by means of the method, whereby the device has a compressed, at least over regions thereof, elastic, porous transfer means.

Abstract: A machine controller includes a memory and a processor configured for operating a machine control for automatically controlling apparatus for performing a machining process on a workpiece at least partially as a function of data relating to a parameter of the workpiece, and a gage control for automatically controlling gaging apparatus for collecting and processing the data relating to the parameter of the workpiece and storing the data in the memory. At least a portion of the memory in which the data relating to the parameter of the workpiece is stored, is configured as a shared memory so as to allow the machine control to immediately retrieve and use the stored data relating to the parameter of the workpiece. The controller has particular utility for use in controlling a honing process and a gaging process, which can be in-process or post-process, and which can be used for bore sizing and other parameters.

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: 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: The invention relates to a device for polishing hard surfaces, especially glass surfaces, said device comprising polishing system (5) provided with a replaceable polishing disk (6). Said polishing system (5) can be displaced in a two-dimensional manner by means of a displacement device (10) comprising a holding element (11) for the polishing system (5), and guiding elements (12, 18; 20, 25) for displacing the holding element (11) in XY directions. The inventive device enables hard surfaces to be repaired in a simple and precise manner.

Abstract: In a tool spindle device, a tool head is slidably guided along guide members on a support table and is movable by a tool head feed mechanism. A tool spindle with a machining tool such as grinding wheel attached thereto is rotatably supported through antifriction bearings in the tool head. A lubrication mechanism is provided in the tool head for lubricating the antifriction bearings with oil air or oil mist. A space section is formed between the support table and the tool head to house the tool head feed mechanism and the guide members therein. A release passage is provided for releasing the oil air or the oil mist after lubricating the antifriction bearings, into the first space section therethrough to lubricate the tool head feed mechanism and the guide members housed in the space section.

Abstract: A tile cutting machine includes a tool support assembly having at least one rail with a rail bearing associated therewith for selective movement there along. The rail bearing includes a housing having a bore therethrough. A plurality of slots are located in the housing adjacent the bore. The slots receive an axle pin having a wheel thereon to provide a roller bearing. Portions of the wheels extend into the bore and ride along an outer surface of the rail when it is received in the bore.

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 method is for using a skate-grinding device. The method provides an automatic sharpening system (10) that has grip members (14, 16) and a grinding wheel (28). A blade (18) of a skate (20) is inserted into a groove (19). The system is turned on. A motor (44) rotates the grinding wheel (28) and automatically moves the grinding wheel (28) within the groove to grind the blade (18). An electronic unit (86) measures a time the system (10) is used. A user of the system (10) is charged for the time measured by the electronic unit (86).

Abstract: The polishing machine processes a workpiece put on table of body by four-directional control and is provided with a pair of columns. It comprises: first carrying unit having both ends fixed to pair of columns and having carrying part mounted on upper side; a second carrying unit being fixed to the carrying part in the direction orthogonal to the first carrying unit; third carrying unit being fixed to one end of the second carrying unit in the direction orthogonal to the second carrying unit; a tool head unit being mounted to lower side of the third carrying unit to be inclinable at predetermined angle by a tilting unit rotating at a constant angle and having driving means for rotating a polishing tool mounted at one side; and automatic constant pressure regulating means providing a predetermined virtual pressure with respect to the polishing tool mounted on the tool head unit.

Abstract: A computer controlled grinding machine grinds a cylindrical region and an annular shoulder of a rotatable workpiece. Relative movement is effected between the workpiece and a grinding wheel along a line of action which subtends an angle of approach of less than 90 degrees to the Z axis of rotation of the workpiece. Such an angle of approach enables the wheel to grind the annular shoulder of the workpiece simultaneously with grinding the cylindrical portion.

Abstract: An apparatus for grinding and/or polishing a surface of a wall element includes a first elongate guide device oriented substantially parallel to the surface of the wall element. A second elongate guide device is movably coupled to the first elongate guide device and oriented orthogonally relative thereto. The second elongate guide device is oriented substantially parallel to the surface of the wall element and moves along the first elongate guide device. A polishing device is movably coupled to the second elongate guide device. The polishing device moves along the second guide device and polishes the surface of the wall element at a plurality of locations along the second guide device and along the first guide device.

Abstract: A cylindrical grinder includes a workpiece support section adapted to support a generally cylindrical workpiece and rotate the workpiece about a rotational axis, and a wheel head adapted to support and rotate a grinding wheel. The wheel head is moved relative to the workpiece support section, along a first direction parallel to a rotational axis of the workpiece and along a second direction perpendicular to the first direction in order to grind an outer surface of the workpiece. The wheel head is turnable relative to the workpiece so that a rotational axis of the grinding wheel can be tilted within a plane substantially passing through the rotational axis of the grinding wheel and the rotational axis of the workpiece, within a range extending across a reference plane perpendicular to the rotational axis of the workpiece. Further, link-type parallel link mechanisms for moving the grinding wheel are disclosed.

Abstract: In a machine tool for cutting treatment of workpieces, comprising a workpiece support having two opposing side walls, a tool support having two opposing side walls and at least one approximately horizontally disposed processing unit (work spindle 8) on the tool support, wherein during operation of the machine tool, forces act between workpiece and processing unit, in particular in the Z direction, the side walls of the tool support and workpiece support, respectively, are combined to form one common side wall (3). Since tool and also workpiece are held at the two common side walls, the forces acting between tool and workpiece are accommodated by said side walls.

Abstract: The phase adjusting method is a method for holding a work including an end face formed symmetrical with respect to the axis of the work and a plurality of recesses respectively formed in a concave manner from the end face and also for positioning the position of each of the recesses around the axis of the work. Specifically, in the phase adjusting method, while holding the work in such a manner that it can be rotated around the axis thereof, the position of each of the recesses around the axis is detected. In accordance with the thus detected position of the recess around the axis, there is obtained a rotation angle by which the work is rotated around the axis thereof in such a manner the recess can be positioned at a given position around the axis of the work. And, based on the thus obtained rotation angle, the work is rotated around the axis thereof to position the recess at a given position around the axis of the work to thereby position the work.

Abstract: The grinding machine for grinding a frictional surface of a pad of the present invention comprises: a grooving cutter to be rotated; a cylindrical grinding wheel arranged at a position distant from the grooving cutter; a pad chucking portion for holding a frictional surface of the brake pad so that the frictional surface can be opposed to the outer circumferential surface of the cylindrical grinding wheel; an X-axis feed mechanism for advancing and retreating the pad chucking portion in the direction of X-axis parallel to the frictional surface of the brake pad; a Y-axis feed mechanism for advancing and retreating the pad chucking portion in the direction of Y-axis perpendicular to the frictional surface of the brake pad; a Z-axis rotation mechanism for rotating the brake pad around the Z-axis perpendicular to the frictional surface of the brake pad; and a numerically controlling circuit for controlling the motions conducted by the above mechanisms.

Abstract: An abrasive apparatus adopted to abrade a curved surface of workpiece includes: an abrading head including an abrading tip having a substantially spherical outer surface and a rotating shaft supporting the abrading tip, the abrading head being positioned to face the curved surface; a thrust moving mechanism for relatively moving the abrading head and the curved surface; a lateral moving mechanism for relatively moving the abrading head and the curved surface; a pivotal moving mechanism for relatively moving the abrading head and the curved surface pivotally around a center point; and a controller for controlling the abrading head, the thrust moving mechanism, the lateral moving mechanism and the pivotal moving mechanism synchronously so that the abrading tip contacts and presses the curved surface at any point thereon with a substantially constant pressure in a direction consistent with a normal line thereat.

Abstract: A polishing apparatus for polishing a workpiece such as a semiconductor wafer to a flat mirror finish includes a rotary drum provided on a surface thereof with a polishing pad. A stand supports the workpiece to be polished. A controlling device controls reciprocation of the drum and rotation of the workpiece to obtain a relationship:V/.omega.>Lin which V represents velocity of reciprocation of the drum reciprocating on the workpiece to polish an entire surface of the workpiece, .omega. represents rotational angular velocity of the workpiece, and L represents a distance from the rotational center of the workpiece to a radially outermost point on the workpiece.

Abstract: An apparatus and method for automated honing of elongated straight-edged cutting blades such as those used in the printing and binding industry for the trimming of books or pamphlets and the like, wherein a sharpened blade which has been ground on other equipment is thereafter registered and secured at a predetermined angle upon a moveable blade holder support of the apparatus hereof, which support is then cycled to longitudinally displace so that the blade edge is thereby brought into sequential engagement with progressively finer abrasive surfaces of a longitudinal array of cooperative upper and lower orbitally driven honing heads whereby on a single reciprocated pass therethrough the blade is efficiently finished to a smooth sharp cutting edge. In an alternate embodiment of the apparatus and method hereof it is the honing heads which are longitudinally reciprocated while the blade to be honed is held upon a stationary blade holder support.

Abstract: In a method of grinding ball grooves formed in a workpiece with a grind stone, the grind stone is fed in a direction of a longitudinal axis of the ball groove in a condition in which an axis of rotation of the grind stone is inclined in the direction of the longitudinal axis of the ball groove relative to a plane which perpendicularly crosses the longitudinal axis of the ball groove. An apparatus for grinding the ball groove has an apparatus bed which is movable in a direction of a longitudinal axis of the ball groove relative to a work holder for holding a workpiece, a supporting bed which is provided on the apparatus bed, a grind stone holder which rotatably mounts on a front end thereof a grind stone for grinding the ball groove, and an electric motor and a gear mechanism for rotating the grind stone. The grind stone holder, the electric motor and the gear mechanism are mounted on the supporting bed.