Abstract: The present application proposes a multi-media three-dimensional additive printer, comprising: a column, a top plate, a turntable and a printing platform; the column is a vertically installed circular cylinder, and the top plate is horizontally mounted on the column; a plurality of printing nozzles are mounted on the lower surface of the top plate, and each of the printing nozzles slides in a direction in which the radius of the column is extended; the turntable is rotatably mounted on the column and disposed coaxially with the column, and the turntable is relatively stationary with the column in the vertical direction; the printing platform is horizontally mounted on the turntable and rotates synchronously with the turntable.

Abstract: A method for hard fine machining of the toothing of a gear that has an axis of rotation, wherein the toothing is machined with a hard fine machining tool. The machining tool rotates around an axis of rotation during hard fine machining. The method includes: a) Providing a hard fine machining tool that has axially adjacent machining zones, including a first zone for the grinding the toothing and a second zone for fine grinding and/or polishing the toothing; b) Grinding the toothing with the first zone, wherein a first pivoting angle exists between the axis of rotation of the gear and the axis of rotation of the machining tool; c) Fine grinding and/or polishing the toothing with the second zone of the machining tool, wherein a second pivoting angle exists, which is different from the first pivoting angle, between the axis of rotation of the gear and the axis of rotation of the machining tool.

Abstract: An eyeglass lens processing apparatus includes: a processing tool configured to process a periphery of a lens; a movement portion configured to change a relative position between the lens and the processing tool; a positional data acquiring portion configured to acquire positional data related to a corner portion of an edge of the lens before the lens is finished and after the lens is roughed; a processing control data acquiring portion configured to acquire corner portion processing control data for removing a chip adhering to the lens through roughing, based on the positional data acquired by the positional data acquiring portion; and a processing control portion configured to control the movement portion based on the corner portion processing control data so as to remove the chip adhering to the lens.

Abstract: A polishing tool unit (1) includes a brush-shaped grinding stone (4) and a tool holder (2). The tool holder (2) includes a shank (2a), a sleeve (6), a gear screw (30), and a nut (36). The nut (36) is screwed onto a bolt portion (34) of the gear screw (30). The brush-shaped grinding stone (4) is connected to the front side of the nut (36) and held by the tool holder (2). The gear screw (30) is rotatable relative to the shank (2a) and the sleeve (6) about the axis (L). While rotation of the nut (36) about the axis (L) is regulated, the gear screw (30) is rotated, whereby the nut (36) is moved and the protruding amount of linear grinding members (3) is adjusted.

Abstract: Disclosed is a method for dressing a single- or multi-thread grinding worm (34) in which a main rolling movement between the grinding worm and a gear-like dressing tool (90) is brought about. In order to create flank modifications on the grinding worm, an additional relative movement is superimposed on the main rolling movement. In addition, an auxiliary drive specifically designed for such a method, a correspondingly designed machine tool and a dressing tool for carrying out the method are disclosed.

Abstract: A machine tool includes one tip arranged on the spindle at a position that faces the table, a cutting edge position storing unit that stores therein multiple measured values that are obtained by performing measurement of the position of the tip at least two times in a state where the spindle is set at at least one phase and the tip is positioned at an identical point, a spindle tilt angle calculating unit that calculates a tilt angle of the spindle with respect to an XY-plane, based on the multiple measured values, and a coordinate system rotation unit that rotates the XY-plane about at least one of X-axis and Y-axis, based on the tilt angle of the spindle calculated by the spindle tilt angle calculating unit.

Abstract: A device region (17) is formed at a central part of a semiconductor wafer (2) and a ring-shaped reinforced portion (18) which is thicker than the device region (17) is formed on an outer circumference of the device region (17). After forming the device region (17) and the ring-shaped reinforced portion (18), the semiconductor wafer (2) is subjected to wet treatment. After the wet treatment, the semiconductor wafer (2) is rotated and dried. A center position of the semiconductor wafer (2) is different from a center position of the ring-shaped reinforced portion (18).

Abstract: A knife sharpener includes guide structure for accommodating thick blades of a knife. The guide structure includes a fixed guide surface having a convex portion to match a concave shape of the blade and a spring guide surface preferably has a convex portion to press against a hollow ground portion of the blade.

Abstract: A gear grinding unit, capable of grinding a tooth flank of a gear to have fine surface roughness without requiring any special shaping work such as dressing, includes a threaded grinding part which is rotatable around a rotation axis (S1) and engages with a tooth of a gear to be ground. Through a rotational motion of the threaded grinding part, a tooth flank of the gear is ground. The threaded grinding part includes a plurality of flexible abrasive sheets each including a virtual circle having a diameter that equals a root diameter (DA) of the threaded grinding part and a bulge part bulging radially outward from the virtual circle. With the bulge parts of the abrasive sheets mutually shifted around the rotation axis (S1), the abrasive sheets are overlapped along the rotation axis (S1) to form the threaded grinding part.

Abstract: A lens edging system of the present invention includes: an edger configured to perform edging of a spectacle lens using an edging tool; a shape measurement device configured to measure an edging shape of a circumferential edge of the spectacle lens after edging by the edger; a memory part configured to store information regarding a reference shape of the edging tool used by the edger; a shape comparing and judging part configured to compare a measurement result obtained by the shape measurement device and a reference shape of the edging tool specified from the information stored in the memory part, and judge necessity/non-necessity for exchanging the edging tool based on a comparison result; and an information output part configured to output information regarding necessity for exchange when the shape comparing and judging part so judges.

Abstract: A wide range of knives and blades, including Western, Asian or traditional Japanese style blades that have a primary edge facet on at least one side of the knife edge are sharpened through use of an electric knife sharpener having a first sharpening stage with at least one rotating abrasive surface disk and a knife angle guide to position the blade's facet at a first relative angle of approximately 15 degrees as it contacts the moving abrasive surface. The knife sharpener includes a second sharpening stage with at least one rotating abrasive surfaced disk and a knife angle guide to position the blade's facet at a second relative angle of approximately 20 degrees as it contacts the rotating abrasive surface.

Abstract: A knife sharpener sharpens a wide range of knives and blades. The knife sharpener includes an angle guide associated with a first stage abrasive surface at an angle in the range of 12-18 degrees. A second stage is provided at an angle in the range of 17-23 degrees. A third stage is provided at an angle in the range of 19-25 degrees. The abrasive surface in the first and second stages is in the range of 240 to 400 grit while the abrasives in the third stage is in the range of 600 to 2000 grit.

Abstract: Disclosed is a blade grinder comprising a blade holder that is mounted so as to be rotatable about a horizontal shaft which is mounted so as to be rotatable about a vertical axis, thus allowing the blade to be optimally adjusted relative to a grinding disk. The grinding disk can preferably be vertically and horizontally moved using spindles. This creates a simple design allowing a lawnmower blade to be ground in a fully automatic manner.

Abstract: A method of using a diamond cutting tool for ornamentation purpose is provided. The method includes positioning a work piece in proximity to a cutting tool. The cutting tool includes a shank. Further, the cutting tool may extend longitudinally from the shank and coaxial therewith. The cutting end includes a cutting end comprised of, but not limited to, a compact mass of sharp diamond dust. Further, the method includes activating the cutting tool to perform one of cutting and polishing of at least a portion of the work piece. Herein, activating the cutting tool enables movement of the cutting tool for positioning thereof. Further, activating the cutting tool may enable spinning of the cutting end to perform one of cutting and polishing of a portion of the work piece based on the positioning of the cutting tool.

Abstract: A system for machining a bevel on a disk shaped part including a grinding device having an abrasive, a device for securing the part including a support to which the part is fitted and which is integral with an axis of rotation. The securing device further includes a system for orienting the axis of rotation to define the angle of the bevel and a system for moving the support closer to the abrasive in order to machining the part under stress. The invention concerns the field of crystals for timepieces.

Abstract: A method of removing at least a portion of an interaction layer on an electrode region of a solar substrate is provided. The method includes a step of providing a solar substrate including an absorbing region and an electrode region. The absorbing region including an absorbing layer configured to convert light energy into electrical energy. The electrode region is substantially free of the absorbing layer, and the electrode region includes an interaction layer. The method also includes a step of brushing the electrode region to remove at least a portion of the interaction layer.

Abstract: A method of superfinishing a large hollow wheel gear in a vibratory bowl having a center hub comprises at least partially filling the vibratory bowl with an amount of finishing media, laying the gear horizontally into the bowl over the center hub, supplying a quantity of an active chemistry into the bowl and agitating the vibratory bowl at a frequency such that the gear settles into and is fully supported by the media. By controlling the process parameters, the hollow wheel gear may be caused to rotate in the media and can be made to float at a desired level. The method is particularly suitable for hollow wheel gears for large wind turbines.

Abstract: There is provided a processing apparatus and an optical member manufacturing method that can improve the figure accuracy and the waviness accuracy, and can highly and precisely process an optical element surface. A processing apparatus generates a pressure between a polishing member and a workpiece and relatively moves the polishing member and the workpiece to process a workpiece. The processing apparatus includes a support member that can perform oscillating movement, and a processing portion that is rotatably attached to the support member. The processing portion includes one or more pressure generation units to generate different pressures between the polishing member and the workpiece.

Abstract: There are provided multilayer ceramic capacitor, a manufacturing method therefor, a circuit board having a multilayer ceramic capacitor embedded therein, and a polishing device for a multilayer ceramic capacitor.

Abstract: A tool spindle for a honing machine includes a bowl-shaped holder having a circumferential peripheral wall connected to a bottom part. The bowl-shaped holder is configured to hold a honing ring on an inside of the bowl-shaped holder. At least one expansion element is formed on the inside of the bowl-shaped holder along an inner surface of the circumferential peripheral wall. The at least one expansion element radially clamps and centers the honing ring inside the bowl-shaped holder. A hydraulic chamber is disposed in the bottom part of the bowl-shaped holder. At least one hydraulic line is connecting in fluid communication the at least one expansion element and the hydraulic chamber. A single adjustment element is movable in relation to the bottom part of the bowl-shaped holder, where the single adjustment element is in fluid communication with the hydraulic chamber.

Abstract: The present document describes a blade sharpening system comprising a blade sharpening device, a blade holding apparatus and a controller operatively coupled to the blade sharpening device and said blade holding apparatus to control sharpening of said blade, and methods of using the same.

Abstract: A polishing device includes a driving member and a polishing head. The polishing head is connected to the driving member and includes a rotating body made of metallic material, a buffering pad, and an abrasive paper. The buffering pad is made of plastic material and is fixedly assembled to the rotating body. The abrasive paper is fixed to a surface of the buffering pad opposite to the rotating body.

Abstract: Polishing and cleaning techniques are combinatorially processed and evaluated. A polishing system can include a reactor assembly having multiple reaction chambers, with at least a reaction chamber including a rotatable polishing head, slurry and chemical distribution, chemical and water rinse, and slurry and fluid removal. Different downward forces can be applied to the polishing heads for evaluating optimum process conditions. Channels in the polishing pads can redistribute slurry and chemical to the polishing area.

Abstract: A grinding device includes a grinding wheel spun by a first driver, a holder, and a second driver providing linear movement to the holder. The grinding wheel defines a groove which has a hemispherical bottom surface. The holder holds a light-transmitting rod with an end inserted into the groove and set substantially parallel to a rotating axis of the grinding wheel.

Abstract: An inner rotary retaining member has an annular outward rolling surface formed of part of a radially outward tapered surface centering on the central axis of a first rotary drive shaft. An outer rotary retaining member has an annular inward rolling surface formed of part of a radially inward tapered surface centering on the central axis of a second rotary drive shaft. The rolling surfaces are opposed to each other. A pocket that supports a workpiece such that the workpiece rotates and revolves as the retaining members rotate is formed at a portion of the carrier, the portion being positioned between the rolling surfaces. The central axis of the workpiece supported by the pocket is inclined relative to the central axis of the rotary drive shafts.

Abstract: A machining installation for workpieces comprises a workpiece positioning device comprising a workpiece holder pivot unit as well as a tool positioning device comprising a tool holder pivot unit. The workpiece holder pivot unit is designed such that a workpiece holder is pivotable about at least three and no more than four workpiece holder pivot axes. Moreover, the tool holder pivot unit is designed such that a tool holder is pivotable about no more than two tool holder pivot axes. The machining installation has a simple design and ensures flexible and accurate machining of workpieces.

Abstract: A workpiece processing apparatus is provided. The apparatus includes a rotary turntable having one or more spindles thereon, the turntable being configured to rotate about a turntable axis. Each of the spindles is configured to receive and secure thereon a workpiece to be processed by the apparatus. Each of the spindles can rotate about their own independent axes. The apparatus includes one or more grind spindles that overlay the turntable and are configured to communicate with the workpieces. The apparatus processes the workpieces by transitioning between first and second operational states. The first operational state centers the spindles and the workpieces thereon under the grind spindle to condition an entire top surface of the workpieces. The second operational state offsets the spindles from the center of the grind spindle to condition a perimeter edge of the workpieces. A controller can govern the transition between first and second operational states.

Abstract: A device and a method for machining, especially for polishing of an optical lens, are proposed, there being both a lens changing apparatus and also a separate tool changing apparatus. The lens changing apparatus is located between a working space and a conveyor apparatus for lenses and is pivotally mounted around a horizontal axis. The tool changing apparatus is located laterally next to the working space.

Abstract: The grinding surface of a grinding stone is formed from a circular conical surface, a drive device for rotation is installed within a housing. The blade of a cutting tool is ground while the longitudinal direction of the cutting tool is aligned with the direction of a generating line of the grinding surface. When grinding the blade, the cutting tool can be aligned with the direction of the generating line of the grinding surface and the blade can be brought in contact with the grinding surface without the handle of the cutting tool and the hand that holds the cutting tool being interfered with the grinder. This is achieved irrespective of in which one of the directions of lines the tip of the blade faces, the lines being obtained by extending the generating line of the grinding surface from both ends of the generating line.

Abstract: A polishing apparatus includes a platen to hold a polishing pad having a plurality of optical apertures, a carrier head to hold a substrate against the polishing pad, a motor to generate relative motion between the carrier head and the platen, and an optical monitoring system. The optical monitoring system includes at least one light source, a common detector, and an optical assembly configured to direct light from the at least one light source to each of a plurality of separated positions in the platen, to direct light from each position of the plurality of separated positions to the substrate as the substrate passes over said each position, to receive reflected light from the substrate as the substrate passes over said each position, and to direct the reflected light from each of the plurality of separated positions to the common detector.

Abstract: A method for producing, ball rollers. The following method steps are performed to produce the ball rollers: (A) cutting unfinished sections at a defined length from a round wire that has a defined diameter, (B) compression molding ball roller blanks that have end face depressions in the form of a die tool, and (C) grinding the ball roller blanks to the desired final dimensions in a ball grinding machine. The cut-off unfinished sections have a volume by which during compression molding an approximately tangential raceway transition from one ball roller half to the other ball roller half and material fibers extending under the running surfaces of the ball rollers parallel or approximately parallel to the running surfaces arise. In addition, the ball roller blanks are ground to the final dimensions in a horizontal ball grinding machine loaded exclusively with ball roller blanks of the same size.

Abstract: An external piece for a time piece and a method of manufacturing the same, including a top surface and a bottom surface. At least one of the faces includes a longitudinal curvature and a transverse curvature that are different.

Abstract: A workpiece feeder is capable of feeding a roller to a roller end face processing machine in a stable posture, a roller end face processing machine, and a roller for a rolling bearing processed by such a roller end face processing machine are provided. The workpiece feeder for roller end face processing includes: a carrier ring having a plurality of recesses arranged in a radially-inner surface thereof at a predetermined pitch along a circumferential direction; a regulating wheel fitted into the carrier ring to form roller fitting cavities between a radially-outer surface of the regulating wheel and the plurality of recesses; a carrier support for supporting the carrier ring on a radially-outer side with respect to the plurality of recesses; and rotational force applying means for applying a rotational force to the carrier ring on the radially-outer side with respect to the plurality of recesses.

Abstract: A lens pad for use in surfacing a lens work piece, one side of which pad provides a working surface and the other side of which pad provides micro formations spread out substantially uniformly over that other side of the pad. When the lens pad is in use, it is attached to a surface of a lens surfacing tool. The latter surface provides micro formations spread substantially uniformly over that surface of the lens surfacing tool. The micro formations of the pad interengage or interlock with those of such a surface of such a lens surfacing tool when the pad is in use. Also, such a lens surfacing tool, a combination of such a pad attached to such a tool, and a lens surfacing machine having such a tool, or such a combination.

Abstract: A method of manufacturing turned surfaces of a rotor disc of a gas turbine engine, including rotating the rotor disc about its central axis, rotating an abrasive grinding wheel having an outer grinding surface with a hardness greater than that of a material of the rotor disc, contacting the rotating wheel with at least one annular surface of the rotating disc, and sliding the rotating wheel along a curved cross-sectional profile of the at least one annular surface of the rotating disc.

Abstract: A tool, method and apparatus to refurbish a valve seat having a compound geometry, such as a valve seat in a valve body for a common rail injector is disclosed. The tool includes a body with a head portion having substantially the same geometry as the valve seat to be refurbished, the tool further including a radiused portion between two angles of the valve seat to provide a chamfered surface on the valve seat to be refurbished. The method includes lapping the valve seat with the tool in and X, Y and Z axis to refurbish the valve seat in a single operation without substantially altering the geometry of the valve, and the apparatus includes slide moveable in an X and Y axis, and a fixture mounted on a preloaded biased base so movement in the Z axis is controllable.

Abstract: Abrasive articles including a body having a first abrasive layer, a second abrasive layer and one or more reinforcing layers for use with cordless tools have a reduced thickness with respect to conventional counterparts. Techniques for producing and using such abrasive articles are described. In one embodiment, the first abrasive layer and the second abrasive layer comprise abrasive particles in a bond material. In an embodiment, a reinforcing layer is disposed between the first abrasive layer and the second abrasive layer. In a particular embodiment, the body comprises an average thickness of not greater than about 5 mm. In another particular embodiment, the abrasive particles can comprise silicon carbide.

Abstract: An apparatus adapted for servicing a turbomachine component includes a tool delivery mechanism adapted for delivering a tool to a desired location in a turbomachine. A tool support is adapted to be secured onto the body of the turbomachine, and is also configured to support the tool delivery mechanism. A machining tool is attached to the tool delivery mechanism, and includes an axial slide clamp configured to clamp to the turbomachine component, a radial slide slidably connected to the axial slide clamp, a spring connected to the axial slide clamp and the radial slide, the spring providing axial tension, and a machining bit retained at least partially within the radial slide. The apparatus is adapted to service the component of the turbomachine in-situ.

Abstract: The present invention relates to a method for operating a gear grinding machine, with the following operating phases of the gear grinding machine: machining a workpiece on the gear grinding machine by means of a grinding disk and/or grinding worm and dressing a profiling tool for profiling a grinding disk and/or grinding worm on the gear grinding machine.

Abstract: The present invention relates to a method for producing periodic tooth flank modifications, wherein a tool is used during a first stroke carried out relative to a tooth flank of a tooth of a workpiece along an axis, which is rotated by a helix angle ? relative to a center axis of the workpiece and which produces an enshrouding plane. The invention further relates to a machine tool, which is designed to carry out said method, and to a computer-readable medium having instructions, which lead to the open- or closed-loop control of a machine tool according to the method above when executed by a processor.

Abstract: A plate locking mechanism for a surface preparation device comprising a connecting plate having a receiving aperture, a base plate and a floating plate capable of being substantially aligned with the base plate. A fastener extends through a floating plate aperture and engages with a base plate aperture and a resilient member is operatively associated with the fastener to maintain the floating plate in contact with the base plate and wherein, when the base plate is located within the receiving aperture, the floating plate is rotatable to retain the connecting plate in position.

Abstract: Disclosed is a blade grinder comprising a blade holder that is mounted so as to be rotatable about a horizontal shaft which is mounted so as to be rotatable about a vertical axis, thus allowing the blade to be optimally adjusted relative to a grinding disk. The grinding disk can preferably be vertically and horizontally moved using spindles. This creates a simple design allowing a lawnmower blade to be ground in a fully automatic manner.

Abstract: With a method for the production of a precise prefabricated concrete part, especially in the form of a sleeper or a plate for a fixed track for rail-guided vehicles, the prefabricated concrete part is ground at the functionally relevant points to the predetermined size by means of a grooved roller. The device for this is a grinding machine with a grooved roller to grind the prefabricated concrete part at functionally relevant points to a predetermined size. The grooved roller is made of a wear resistant material, especially silicon carbide.

Abstract: A floor grinding and polishing machine including a base that includes a shroud, and first and second spindle carriers rotatably coupled thereto which have first and second axes of rotation spaced from each other in an alignment direction. The base also includes first and second pluralities of rotatable spindles, each plurality carried by a spindle carrier and distributed about the respective spindle carrier axis of rotation. Motors are connected to the shroud and drivingly engaged with the pluralities of spindles, whereby each plurality of spindles is rotatably driven about its respective spindle axis of rotation. The machine also includes floor-engaging handle coupled to the base and defining a direction of operative movement along which the machine may linearly travel. The base and handle have different first and second selective, relative positions in which the alignment and operative movement direction have substantially different relative angular positions.

Abstract: The present disclosure provides an apparatus for fabricating a semiconductor device. The apparatus includes a polishing head that is operable to perform a polishing process to a wafer. The apparatus includes a retaining ring that is rotatably coupled to the polishing head. The retaining ring is operable to secure the wafer to be polished. The apparatus includes a soft material component located within the retaining ring. The soft material component is softer than silicon. The soft material component is operable to grind a bevel region of the wafer during the polishing process. The apparatus includes a spray nozzle that is rotatably coupled to the polishing head. The spray nozzle is operable to dispense a cleaning solution to the bevel region of the wafer during the polishing process.

Abstract: The present disclosure relates to an internal gear grinding machine with a grinding arm, on which a grinding spindle is arranged, and with an adjustable coolant nozzle, wherein the coolant nozzle is adjustable via a drive.

Abstract: The present disclosure relates to an internal gear grinding machine having a grinding arm at which a grinding spindle is arranged and having a measuring head, wherein the measuring head advantageously includes a measuring sensor. Furthermore, in accordance with the present disclosure, the measuring head is movable from a grinding position into a measuring position via a linear guide.

Abstract: A grinding machine includes a pair of workpiece support devices (12, 13), which clamp and rotate a workpiece (W), on a bed (11). A pair of saddles (14) is provided on the bed (11) in such a way as to be movable along the rotational axis of the workpiece (W). Grindstone heads (16) provided with rotating grindstones (16c) and drive mechanisms (16d) are supported on the saddles (14) in such a way as to be movable in a direction that perpendicularly intersects the movement direction of the saddles (14).

Abstract: A multi-layer surface treating pad is disclosed. It has an upper layer suitable to serve as one part of a hook/loop type fastener system, a bottom layer which comprises an abrasive or polishing material, and a cleaning or other surface treating formulation positioned between the upper and bottom layer in the form of a bump which is positioned mostly in a central region of the pad. The bump of the formulation causes the upper layer to bulge upwardly so as to provide a visual indication as to where one optimally should attach a motorized device thereto.

Abstract: A polishing pad auxiliary plate including: a lower auxiliary plate overlapping a top surface of a rotating surface plate of a polishing device; a first adhering member adhering the lower auxiliary plate to the rotating surface plate; an upper auxiliary plate with a pad support surface on which the polishing pad is overlapped and adhered, while overlapping a top surface of the lower auxiliary plate; a second adhering member adhering the upper auxiliary plate to the lower auxiliary plate; and an alignment member for mutually aligning the lower and upper auxiliary plates and matching center axes thereof. By removing the upper auxiliary plate from the lower auxiliary plate, the polishing pad is removed from the rotating surface plate while being adhered to the pad support surface of the upper auxiliary plate, and the removed upper auxiliary plate is reattached and aligned to the lower auxiliary plate by the alignment member.