Abstract: A cutting roller has an axle (2), on which a cutting ring (4) is rotatably guided by a bearing device (10, 12). The bearing device is sealed against the environment by a sealing device (28, 30). By a compensating device (40), any differential pressure between the bearing device (10, 12) and the environment is compensable.

Abstract: The invention relates to a device (10) for machining, in particular eroding and grinding, rotational workpieces (44) provided with cutting edges, with a machine base (12), a machining mechanism (14), which can be displaced relative to the machine base (12), and a workpiece positioning mechanism (18), which can be displaced relative to the machine base (12), wherein the machining mechanism (14) has at least one machining tool (30), which is attached in a rotatably drivable manner to a slide arrangement (20), which can be displaced in relation to the machine base (12), for machining a functional portion to be machined of the rotational workpiece (44), and wherein the workpiece positioning mechanism (18) has a workpiece holding mechanism (46), which can be displaced relative to the machine base (12) and holds a holding portion of the rotational workpiece (44) directly or via a holding adapter for attaching the rotational workpiece (44) to the workpiece positioning mechanism (18).

Abstract: There is provided a method of polishing the inner peripheral end surfaces of disk-like substrates for a recording medium using a brush comprising, providing a plurality of pieces of disk-like substrates having circular holes at the central portion thereof; bringing a polishing material slurry containing a polishing material into contact with the object to be polished; inserting a polishing brush into the circular hole of the object from a first side of the object to be polished, and rotating the polishing brush with the shaft as a center to polish the inner peripheral end surfaces of the substrates; and inserting the polishing brush into the circular hole of the object to be polished from a second side opposite to the first side and rotating the polishing brush with the shaft as a center axis to polish the inner peripheral end surfaces of the substrates.

Abstract: A chemical-mechanical polishing apparatus including a table top, a transfer station mounted on the table top, a plurality of polishing stations mounted on the table top, a plurality of washing stations, and a plurality of carrier heads supported by a support member rotatable about an axis. Each washing station is located between a first polishing station and either a second polishing station or the transfer station, and the transfer station and the plurality of polishing stations are arranged at approximately equal angular intervals about the axis.

Abstract: A chemical-mechanical polishing apparatus including a table top, a transfer station mounted on the table top, a plurality of polishing stations mounted on the table top, a plurality of washing stations, and a plurality of carrier heads supported by a support member rotatable about an axis. Each washing station is located between a first polishing station and either a second polishing station or the transfer station, and the transfer station and the plurality of polishing stations are arranged at approximately equal angular intervals about the axis.

Abstract: A method and a device for grinding a machine part that has two shaft elements, a machine part axis and a large diameter central element having a side surface which is embodied in the form of a flat truncated cone. The machine part is clamped between centers and is movable in a direction of the machine part axis. The side surface is ground by a cylindrical outer contour of a first grinding wheel such that the cutting speed is constant across the entire axial dimension of the first grinding wheel which is mounted on a grinding spindle along with a second, narrower grinding. The second grinding wheel is positioned to grind the shaft element by swiveling the spindle using two pivots that are located perpendicular to each other and by displacing the grinding spindle perpendicular to the machine part axis with the machine part remaining in the same clamped position.

Abstract: An apparatus and associated methods for polishing semiconductor wafers and other workpieces that includes polishing surfaces located at multiple polishing stations. Multiple wafer heads, preferably at least one greater in number than the number of polishing stations, can be loaded with individual wafers. The wafer heads are suspended from a rotatable support, which provides circumferential positioning of the heads relative to the polishing surfaces, and the wafer heads move linearly with respect to the polishing surface, thus providing relative linear motion between the wafer and the polishing station. A load/unload station may be located at a position symmetric with the polishing surfaces. The rotatable support can simultaneously position one of the heads over the load/unload station while the remaining heads are located over polishing stations for wafer polishing so that loading and unloading of wafers can be performed concurrently with wafer polishing.

Abstract: A method of positioning a grooved grinding wheel relative to a disc-like circular workpiece for edge grinding the workpiece using the groove in the wheel includes the steps of mounting the workpiece for rotation about a first axis, mounting the grinding wheel for rotation about a second parallel axis, effecting relative movement between the workpiece and the wheel to engage the rim of the wheel within the groove and performing a preliminary grind. The position of the wheel is axially adjusted in accordance with the measurements made on the profile of the rim produced by the preliminary grind, and the rim is ground again with a second preliminary grind with the grinding wheel located at the axially shifted position. The steps of grinding and measuring the periphery of the workpiece are repeated until the rim profile possesses the desired accuracy. The final position of the grooved grinding wheel is then utilized for grinding future wafers.

Abstract: It comprises a plurality of carrying units mounted on a turntable, with each of the carrying units securing a wheel rim or the like to be polished, and a plurality of polishing units, each one of which includes a polishing element that carries out a polishing operation on the wheel rim, in such a way that for each position of the turntable each one of the carrying units is situated facing a polishing unit. It is characterized in that the central shaft of each carrying unit is inclined with respect to the horizontal by a predetermined angle. It permits to polish a wheel rim or the like completely, and it is not necessary to polish manually the parts of the wheel rim which it is more difficult to reach.

Abstract: A method for creation of a surface from a rough blank for spectacles is which is suitable for both brittle-hard materials and for plastics uses makes use of a disk-shaped, rotation-symmetrical tool of relatively large diameter, by means of which the material to be taken off the rough blank is removed with high grinding or milling efficiency in at least two work steps—a plunge-cut step and a shaping step with material removed along a spiral path. The outcome of the last work step is a machining path traveling in a spiral from the outside to the inside with low residual apex height and relatively large apex spacing. The resulting surface needs only slight fine-grinding and polishing aftertreatment. As an option, both a rim machining step adapted to the form of the eyeglass frame and a work step faceting the rim of the eyeglasses can be integrated into the method. Furthermore, tools are proposed for carrying out the grinding and milling process.

Abstract: A machine for cutting/grinding ophthalmic lenses has a lens spindle aligned on a vertical longitudinal axis and a tool spindle aligned on an angled axis in relation to the vertical axis. The lens blank is chucked on the upper end of the lens spindle and a tool is mounted on a lower end of the tool spindle. One motor rotates the lens spindle and the lens blank about the longitudinal axis and a second motor vertically reciprocates the lens spindle and the lens blank. A third motor rotates the tool spindle and the tool about the angled axis and a fourth motor linearly horizontally reciprocates the tool spindle and the tool. A microprocessor coordinates the rotation and reciprocation of the spindles to cause the tool to cut/grind the lens blank to a predetermined contour. The tool has a spherical grinding surface of diameter approximating but not greater than twice the radius of the steepest lens curvature to be cut/ground.

Abstract: A process for manufacturing wire or needles having a taper point and mechanically drilled suture mounting holes in the proximal ends. Needle or wire blanks are cut from a roll of wire and mounted to a carrier strip. The carrier strip and needles are moved through a succession of forming and trimming and grinding stations. The blanks are coined in a coining die to produce lateral wings of constant thickness. The blanks are preferably rotated in the strip while being ground. The strip and needle blanks are then moved to a bank of at least two drills wherein the proximal suture mounting ends of the needles are drilled.

Abstract: A method for creation of a surface from a rough blank for spectacles is which is suitable for both brittle-hard materials and for plastics uses makes use of a disk-shaped, rotation-symmetrical tool of relatively large diameter, by means of which the material to be taken off the rough blank is removed with high grinding or milling efficiency in at least two work steps--a plunge-cut step and a shaping step with material removed along a spiral path. The outcome of the last work step is a machining path traveling in a spiral from the outside to the inside with low residual apex height and relatively large apex spacing. The resulting surface needs only slight fine-grinding and polishing aftertreatment. As an option, both a rim machining step adapted to the form of the eyeglass frame and a work step faceting the rim of the eyeglasses can be integrated into the method. Furthermore, tools are proposed for carrying out the grinding and milling process.

Abstract: A circular grinding machine wherein a reciprocable carriage supports a first rotary tool spindle for a relatively large grinding wheel and the housing including the bearing for the first spindle mounts a carrier which is pivotable about the axis of the first spindle by a fluid-operated motor and supports a second tool spindle for a relatively small grinding wheel. The carriage can be advanced to a first position to move the relatively large grinding wheel into coarse material removing contact with a rotary workpiece (such as a camshaft), and the carriage is thereupon retracted to a second position in which the carrier can be pivoted about the axis of the first spindle to move the relatively small grinding wheel into precision-finishing engagement with the pretreated workpiece.

Abstract: A process for manufacturing wire or needles having a taper point. Needle or wire blanks are cut from a roll of wire and mounted to a carrier strip. The carrier strip and needles are moved through a succession of forming and trimming and grinding stations. The blanks are preferably rotated in the strip while being ground.

Abstract: A process for manufacturing wire or needles having a taper point. Needle or wire blanks are cut from a roll of wire and mounted to a carrier strip. The carrier strip and needles are moved through a succession of forming and trimming and grinding stations. The blanks are preferably rotated in the strip while being ground.

Abstract: A toothed timing belt is produced from a belt blank utilizing an apparatus having a belt blank fixturing device for supporting the belt blank for selective indexable rotation about a first axis and a toothed grinding wheel rotatable about a second transverse axis and supported for movement across the width of the belt blank in a direction parallel to the first axis for cutting a series of circumferentially spaced transverse teeth into the belt blank. The belt blank is indexed with each pass of the grinding wheel until the entire belt has been provided with teeth. The toothed belt blank may then be severed about its periphery to provide a plurality of discrete timing belt members.

Abstract: A process for manufacturing wire or needles having a taper point. Needle or wire blanks are cut from a roll of wire and mounted to a carrier strip. The carrier strip and needles are moved through a succession of forming and trimming and grinding stations. The blanks are preferably rotated in the strip while being ground.

Abstract: A twist drill sharpener employing a pair of rotary grinding wheels has three primary drill chuck receiving openings, one for alignment of the twist drill and cams on the twist drill chuck; a second receptacle for grinding the end of a chucked twist drill; and a third receptacle which receives the drill and chuck for grinding a split point on the sharpened twist drill.