Abstract: A double surface grinding method for a vertical type of double disc surface grinding machine in which upper and lower ground surfaces of a work like a disc brake are ground simultaneously. The entire vertical moving stroke of the grinding wheel includes an idle feed stroke in which the wheel moves at a specified idle feed speed from the waiting position to a detection start position before contacting with the ground surface; a detection stroke in which the wheel moves at a detection speed lower than the idle feed speed from the detection start position to a detection end position after contacting with the ground surface then the wheel detects a grinding start position; and a grinding stroke in which the wheel moves at a grinding speed from the grinding start position to a grinding end position.

Abstract: The invention relates to a device for peeling or shaping products such as potatoes comprising a frame, at least a first and a second grinding roller rotationally supported by the frame, at least one of the rollers comprising a grinding surface intended to contact the product during peeling or shaping, and a driving device for rotating the grinding rollers the first grinding roller comprising a substantially cylindrical body provided with axially adjacent peripheral grooves. To be able to make products of varying sizes with the same device, the device comprises means for adjusting the distance between said first and second grinding roller. The second grinding roller comprises a substantially cylindrical body provided with axially adjacent protrusions, which at least partly extend into the grooves when the distance between said first and second grinding roller is minimized.

Abstract: An abrading machine is disclosed for abrasion of substantially plane items by use of rotating abrading discs, which are moved simultaneously forwards and backwards transverse to the item and which preferably has downward extending abrasive lamellae. The machine also preferably includes one, typically two, opposite rotating abrading cylinders fitted with elongated abrasive elements radially mounted on the abrading cylinder and has abrasive lamellae extending outwards from the cylinder. By moving the abrading discs in a reciprocatory movement transverse to the direction of feed of the items it is achieved that traces etc. from the different abrasive properties of the abrading discs are eliminated as well as all parts of milled out areas etc. are evenly abraded, particularly if the abrading device is designed for using abrading discs with abrasive means comprising abrasive lamellae made of abrasive cloth and which extend downwards from the face of the abrading disc.

Abstract: Disclosed is a device for grinding a liquid crystal display panel improving the efficiency of using equipment by independently operating first and second grinding units for grinding the unit liquid crystal display panel. The present invention includes a first grinding unit grinding edges of short or long sides of the unit liquid crystal display panel in a normal mode and a second grinding unit grinding the edges of the short or long sides of the unit liquid crystal display panel that are not ground by the first grinding unit in the normal mode or grinding the edges of the long and short sides of the unit liquid crystal display panel in an emergency mode.

Abstract: An apparatus for removing a film layer on a glass plate includes: a supporting base for supporting a glass plate; a pair of removing devices for removing a film layer on the glass plate; a transporting device for transporting the glass plate; and a control unit for defining in a divided manner a region of a film layer to be removed by the pair of removing devices and for causing the pair of removing devices to concurrently effect removal of the film layer on the glass plate in an apportioned manner with respect to divided regions defined in the divided manner.

Abstract: On account of the constructional form of the tool head (17) according to the invention, the opposite sides (18, 19) of a tool (13) attached to the tool spindle (14) of a numerically controlled continuously generating gear grinding or hobbing machine are capable of machining the upper and lower sets of teeth (2, 3) of a double-sided face-gear (1) in one and the same set-up and without disturbing the synchronization between the rotations of the grinding worm and workpiece maintained during the grinding of the first set of teeth, without risk of collision. This eliminates the need to reset the workpiece (1) between the machining of the two sets of teeth (2, 3), thereby shortening the overall machining time substantially, and allowing the avoidance of accuracy losses due to the resetting of the workpiece (1).

Abstract: The present invention relates to a method and apparatus for rectifying cylindrical articles, in particular nuclear fuel pellets. In said method, in characteristic manner, the dust generated by the rectification by a working grind wheel acting on said pellets remains confined and practically all of it is entrained beside said working grind wheel so as to be taken away by forced suction.

Abstract: A sharpener assembly for a food slicer includes a rotatable frame with a sharpening member and a truing member operatively connected for rotation with the frame. The frame is mounted on a food slicer to place the sharpening member and truing member on opposed sides of a slicer knife. The frame is rotated to rotate the sharpening member and the truing member into contact with respective sides of the slicer knife.

Abstract: The work-piece-processing machine of the present invention is compact and has two tools for precisely processing a work-piece. In the work-piece-processing machine, the work-piece is processed by a first tool and a second tool. Diameter of the second tool is shorter than that of the first tool. A first motor rotates the first tool. A second motor rotates the second tool. The first motor and the second motor are attached to a rotatable member. A rotating unit rotates the rotatable member in a vertical plane.

Abstract: A centerless grinding apparatus (10) includes an outer diameter surface grinding wheel (11) for grinding the outer diameter surface of a work (1) of a substantially cylindrical shape, a regulating wheel (12) for supporting the outer diameter surface of the work (1) in conjunction with the outer diameter surface grinding wheel (11) and an end surface grinding wheel (21) for grinding the end surface of the work (1). The end surface grinding wheel (21) grinds the end surface of the work (1) while the outer diameter surface grinding wheel (11) grinds the outer diameter surface of the work (1) in a state that the work (1) is disposed between the outer diameter surface grinding wheel (11) and the regulating wheel (12).

Abstract: An asymmetric double-sided substrate scrubber is provided. The asymmetric double-sided substrate scrubber includes a first roller and a second roller. The first roller is constructed from a first material having a first density and the second roller is constructed from a second material having a second density. The second density is designed to be greater than the first density. The first roller is designed to be applied onto a first side of a substrate with a first force and the second roller is designed to be applied onto a second side of the substrate with a second force. The second force is configured to be substantially equivalent to the first force.

Abstract: An adjustable grinding machine for grinding a plurality of first articles, wherein each first article has two substantially opposite surfaces, and a plurality of second articles, wherein each second article has two substantially opposite surfaces. The adjustable grinding machine includes a structural support member, and a first grinder assembly supported from the structural support member, wherein the first grinder is adapted to grind the two surfaces of the first article simultaneously. The adjustable grinding machine further including a second grinder assembly supported from the structural support member, wherein the second grinder is adapted to grind the two surfaces of the second article simultaneously.

Abstract: The present invention relates to methods and apparatus for removing coatings from generally opposed first and second major surfaces of a substrate. The method includes providing a table having a surface for slidable receipt of the substrate. First and second grinding apparatuses are provided at a mounting portion of the table, opposite one another. As the substrate moves over the table surface, it contacts the first and second grinding apparatuses. The coatings are simultaneously removed from the first major surface with the first grinding apparatus from the second major surface with the second grinding apparatus.

Abstract: A presser roll for surface planers is described herein. The presser roll comprises a longitudinal shaft, a radially deformable generally cylindrical sleeve mounted on said longitudinal shaft for rotation in unison therewith and a biasing assembly mounted between the shaft and the sleeve for outwardly biasing the sleeve.

Abstract: A method and apparatus for holding a sheet of material during grinding of the edge of the sheet. The method and apparatus comprises supporting one surface of the sheet on a conveyor. A force is exerted on the sheet with a fluid pressure device, either using sub-atmospheric pressure or hydrostatic pressure.

Abstract: A bilateral automatic machine for machining the edges of plates of glass, stone-like and of other plate shaped materials and the like, comprising a supporting frame which has a conveyor for the plates to be machined. There are also provided an abutment shoulder and a movable shoulder for supporting abrasive grinding wheels which act on the opposite edges of the plates. The machine comprises, for each shoulder, downstream of the last grinding wheel in the direction of advancement of the plates, a sensor for detecting the dimensions of the plates being machined which drives an advancement device for the advancement of the last grinding wheel.

Abstract: On account of the constructional form of the tool head (17) according to the invention, the opposite sides (18, 19) of a tool (13) attached to the tool spindle (14) of a numerically controlled continuously generating gear grinding or hobbing machine are capable of machining the upper and lower sets of teeth (2, 3) of a double-sided face-gear (1) in one and the same set-up and without disturbing the synchronization between the rotations of the grinding worm and workpiece maintained during the grinding of the first set of teeth, without risk of collision. This eliminates the need to reset the workpiece (1) between the machining of the two sets of teeth (2, 3), thereby shortening the overall machining time substantially, and allowing the avoidance of accuracy losses due to the resetting of the workpiece (1).

Abstract: In a lens grinding apparatus, an edge corner-portion processing unit has a cutting tool for effecting a facet processing on an edge corner portion of a lens subjected to the finishing process. A region designating unit has a display unit for displaying a shape of the lens before the facet processing on the basis of inputted data. The region designating unit designates a region to be subjected to the facet processing using of the displayed lens shape. A selecting unit selects a facet processing style to be adopted for the designated region of the facet processing from among a plurality of facet processing styles. A computing unit obtains processing data on facet processing on the basis of the selected facet processing style and the position of the edge corner portion in the designated facet processing region.

Abstract: A bilateral edge-type machine for machining the edges of glass, or stone-like plate materials and the like comprising a supporting frame for a plurality of machining heads arranged on both sides of the plate being machined. Each head comprises a structure associated with a supporting body which is connected to the frame. The structure has, on one side, a grinding wheel supporting spindle which is directed upward and, on the other side, an actuation motor which is directed upward. The motor is connected to the spindle by way of a belt drive.

Abstract: A blade sharpening method and apparatus is characterized by sharpening the blade in a single station grinding assembly. The grinding assembly includes two opposed abrading wheels which interlock to form a nip for sharpening the blade. The wheels each include a first coarse portion for roughing an edge of the blade, a second fine portion for finishing the hone facet, and a third coarse portion for forming other facets adjacent to the hone facet. The wheels are specially contoured and have parallel axes tilted relative to the direction of travel of the blade. The striations formed on the facets of the blade by the abrading wheels extend at the same angle in both facets.

Abstract: An edging unit applicable to machines for working the edges of plates, particularly of glass plates, comprising, at least one edge of a plate being worked, a first movable element and a second movable element which respectively support a first grinding wheel and a second grinding wheel. The movable elements are connected to actuators in order to respectively move the first grinding wheel so that it acts on the front edge of the plate being worked and the second grinding wheel so that it acts on the rear edge.

Abstract: An apparatus for preparing a semiconductor wafer is provided. The apparatus includes a pair of drive rollers disposed so as to support a semiconductor wafer in a substantially vertical orientation. Each of the drive rollers is configured to be coupled to a drive belt for rotating the drive rollers. The apparatus further includes a pair of wafer preparation assemblies that is movably disposed in an opposing relationship. Each of the wafer preparation assemblies have a first wafer preparation member and a second wafer preparation member. The wafer preparation assemblies being movable into a first position in which each of the first wafer preparation members is positioned to perform a first wafer preparation operation on the wafer and into a second position in which each of the second wafer preparation members is positioned to perform a second wafer preparation operation on the wafer.

Abstract: A grinding machine (1) that comprises two aligned columns (2,3), each of said columns (2,3) being provided with one wheelhead (4,5) with its respective grinding wheels (6,7). The columns (2,3) slide over a base (9) common to both and parallel to at least one machining table (11), each of the wheelheads (4,5) has its own vertical drive system and its own transverse drive system and both grinding wheels (6,7) may work simultaneously.

Abstract: An apparatus (10) and method for conveying abrasive web (16), such as photographic media, has a pair of closely spaced rollers (12, 14) through which the abrasive web (16) is conveyed while in contact with a coated media bearing surface (80, 90). The media bearing surface (80, 90) comprising a composite coating or a thin inorganic coating.

Abstract: An apparatus (10) and method for conveying abrasive web (16), such as photographic media, has a pair of closely spaced rollers (12, 14) through which the abrasive web (16) is conveyed while in contact with a coated media bearing surface (80, 90). The media bearing surface (80, 90) comprising a composite coating or a thin inorganic coating.

Abstract: To provide a small polishing means featuring high machining efficiency that is capable of efficiently and quickly mirror-polishing an outer periphery of a chamfered workpiece (5) by bringing the outer periphery into even contact with a plurality of polishing drums (2, 2) at the same time. In an apparatus for polishing an outer periphery by bringing an outer periphery of the workpiece (5) retained by workpiece retaining means (3a, 3b) into contact with two polishing drums (2, 2) simultaneously to perform mirror polishing, the workpiece retaining means (3a, 3b) are supported by a sliding mechanism (16) such that they may move in a direction in which the two polishing drums (2, 2) are arranged, thereby to form an aligning means. In addition, the workpiece retaining means (3a, 3b) are provided with loading means (30) for absorbing a force applied to the workpiece retaining means in an X direction, the force being generated due to contact between the rotating workpiece (5) and the polishing drums (2, 2).

Abstract: This apparatus has plural fixed grinding machines, which are installed along the direction of travelling line of billets. Facing pairs of grinders are equipped in a manner that the distances between each facing pair of grinders are gradually shorter along the travelling direction of the billets from the upstream side to the downstream side. In such a multiple-stage grinding machine, the burr on the welded part of the top and bottom side of the billet is ground sequentially by the grinders, and the burr on welded part of the right and left side of the billet is ground sequentially by the grinders.

Abstract: A method and apparatus is provided for producing raw edge belts. Plural square-cut ring-shaped belts are suspended across a main spindle roller and a tension roller, and while the belts are made to run circularly, the belts are ground into V-section belts to produce raw edge belts. The ring-shaped belts are roughly ground on the main spindle roller section into belts of an almost V-form section by a rough grindstone having V-forms in its peripheral. The roughly-ground ring-shaped belts are thereafter subjected to finish polishing with a finish grindstone.

Abstract: A brush deburring machine includes upper and lower synchronized dogged conveyors that translate workpieces between a pair of cylindrical wire brushes to remove burrs from the ends of the workpieces. A first support surface is defined on each of the dogs of the upper conveyor, and a second support surface is defined on each of the dogs of the lower conveyor. Workpieces are retained between the first and second support surfaces to prevent the workpieces from becoming unstable and shifting diagonally between the wire brushes, yet are permitted to rotate with respect to the first and second support surfaces to cause the entire circumference of the ends of the workpieces to be deburred.

Abstract: A hand-held, material removing tool for processing sheet material, having a first abrasive body having on the outer surface thereof a material-remover for processing of sheet material, a drive device for driving the abrasive body, and a second abrasive body driven by the drive device, such that a double-sided simultaneous processing by both abrasive bodies of the sheet material arranged between the abrasive bodies is enabled.

Abstract: Two imaging equipment are provided at a pair of cutting blade units, and the two imaging equipment image patterns at first positions in proximity to the center of a wafer at the same time. A controller drives drive mechanisms to align the wafer in such a way that current image patterns at the first positions can match with a reference pattern at the first positions. Then, the two imaging equipment are moved to positions for imaging patterns at second positions at the outer circumference of the wafer to image the patterns at the second positions. The controller drives the drive mechanisms to align the wafer in such a way that current image patterns at the second positions can match with a reference pattern at the second positions.

Abstract: Disclosed is an improved precision cutting apparatus comprising a chuck table for holding a workpiece, and first and second cutting means each including a spindle unit having a blade attached thereto. The first and second cutting means are series-arranged with their blades opposing a predetermined distance apart, thereby cutting along two traces at one time by moving the chuck table relative to the stationary cutting means. These cutting means need not be allowed to overrun the workpiece while cutting, thus saving extra time required for overrunning which otherwise, would be required as is the case with the parallel-arrangement of two cutting means, and accordingly the dicing can be performed at an increased efficiency.

Abstract: A multi-directional abrading machine for surface conditioning in the flat for elongated components, in particular, bumpers for motor vehicles. The machine comprises a frame including an upper portion and a lower portion. The upper and lower portions are adjustable with respect to each other. The machine includes both rotating abrading drums and rotating abrading discs. The machine preferably includes a pair of top abrading drums as well as one bottom abrading drum. The two top abrading drums are provided at the infeed side of the machine while the one bottom abrading drum is provided at the outfeed side of the machine. A coolant spray is strategically directed to the abrading drums. Between the pair of top abrading drums and the bottom abrading drum are mounted two abrading discs.

Abstract: A new machine for and method of manufacturing fluted pin fasteners and the pins produced thereby are disclosed which utilize a circular grinding arrangement of a plurality of grinders which grind flutes into a threaded pin. An internally threaded collar threads onto the pin. When the collar engages a surface of a work piece, resistance to further threading increases. When sufficient resistance to threading occurs, the driver deforms the lobes of the collar radially inward toward the axis of the collar. Material of the collar positioned internally from the lobes responds to deformation of the lobes and flows radially inward into the flutes of the pin to lock the collar, pin, and work piece together. The driver then rotates freely, and a joint has been made with a predetermined axial load thereby locking the component parts together.

Abstract: A dicing machine of the present invention is provided with two spindles, which are arranged parallel to one another in the direction of the Y-axis and face one another. A workpiece is moved toward the spindles in the direction of the X-axis, and two blades fitted to the two spindles cut the workpiece. The two spindles are movable in the direction of the Y-axis, so that the two blades can be arranged at a desired interval. One of the spindles is movable in the direction of the X-axis so that the two blades can be arranged on the same street. Hence, desired two streets or one street can be simultaneously cut with the two blades.

Abstract: Grinding and regulating wheels are carried on opposed feed slides on a machine base. A workrest is fixed to the base between the opposed wheels. Wheel dressers are mounted to cross-slides on the base, behind the wheels, independent of the feed slides. CNC dressing occurs through combined transverse motions of feed slide (with wheel) and cross slide (with dresser).

Abstract: A sharpening device for use with a continuous flexible band cutting blade. The sharpening device includes a pair of rotating abrasive wheels positioned on opposite sides of the cutting blade. The rotating wheels are mounted to a pivot plate on either side of a pivot point between the pivot plate and an assembly arm. The pivot plate is rotatable about the pivot point through the application of a pressure device to the pivot plate. By rotating about the pivot point, the pivot plate moves the abrasive wheels into contact with the cutting blade to facilitate sharpening. The assembly arm is fixed about its upstream end, while the downstream end is movable to adjust the position of the abrasive wheels.

Abstract: The invention features flattening a sliced wafer in a thin disc-like form, and chamfered if necessary, through simultaneous double side grinding by passing the wafer through between paired cylindrical grinding rolls supported at both ends in bearings, and subsequently single side polishing or double side polishing the flattened wafer to obtain a polished wafer. A lapping step and an etching step in the related art thus can be dispensed with to curtail the process time. The grinding is done by simultaneous double side grinding, so that it is free from slice mark transfer due to vacuum suction of wafer to hold the wafer, or unlike a wax mounting system it does not involve complicated operation. Furthermore, instead of batch grinding, continuous grinding can be readily made. The process is thus free from working stock removal fluctuations and permits high flatness and stable thickness to be obtained by the grinding.

Abstract: A dental instrument sharpening system includes an instrument arm for holding a chiral bladed dental instrument and for facilitating movement of at least one of the chiral blades of the dental instrument to a rotatable sharpening stone. A positioning mechanism, coupled to the instrument arm, positions at least one of the chiral blades of the dental instrument in a desired predetermined position. The positioning mechanism includes a clamping mechanism and indexed slotted member. The indexed slotted member has index protrusions, such as protruding nubs, that matingly engage with indentations in the handle of the dental instrument. The handle of the dental instrument includes at least one index indentation such as a conical indentation. The index indentation and the corresponding index protrusion mate to properly position the blade of the dental instrument in a predetermined longitudinal and axial position in the clamping mechanism.

Abstract: The machine comprises at least one workpiece-bearing device is provided, upon which a tile or a stack thereof can be placed and blocked. The workpiece-bearing device is revolvable and can be positioned at any angle about a fixed axis. At least one drive head is fitted with at least one rotating grinding wheel, which operates on one side of the tile or on same sides of tiles forming the stack. The workpiece-bearing device and the drive head are constrained to a fixed frame in such a way that a plane of work motion of the at least one grinding wheel is disposed parallel to an axis of rotation of the workpiece-bearing device.

Abstract: A slide table is slidably supported on the slide stage which is moved by a guide screw. The slide table is connected with the slide stage by means of pressurization means. A rotatable wafer table is provided on the slide table. A grinding wheel for chamfering is used. The pressurization means is locked, so that the slide table is kept locked to the slide stage. A wafer set on the slide table is moved toward the grinding wheel, and an edge of the wafer is chamfered. A grinding wheel for polishing is used. The pressurization means is not locked, so that the slide table can be slide on the slide stage. A wafer set on the slide table is moved toward the grinding wheel, and an edge of the wafer is polished.

Abstract: A pipe end trimming device for hand-held use in beveling the outer surface of the end of one pipe so that the beveled end may fit within the end of a similar diameter pipe for a strong connection therebetween. The preferred embodiment abrasive cylinders which are motor driven. An aligning arm with an adjustable aligning edge allows for quick, uniform beveling of different diameter pipe. Shielding adjacent to the abrasive cylinders protects the operator from debris thrown from the pipe during the beveling process.

Abstract: A device for producing inclines and/or grooves on friction pads, such as brake pads for motor vehicles comprises a table with a mount for the brake pads. The table is linearly moved on a carriage below flat, truncated-conical grind disks which are disposed in pairs and oriented mutually mirror-symmetrical. The table is swivellable about an axis oriented tranversely to the travel direction. The swivel movement is effected by at least one pneumatic cylinder. Control valves or control switches run onto cam ramps on cam bars when the table is driven forward and they initiate the swivel operation of the table. The friction pad is operated on when the table is in the downwardly or upwardly pivoted position, whereby the table is preferably locked in its position during the various grinding operations.

Abstract: An apparatus for grinding a disc brake disc having opposite surfaces, the apparatus comprising: a free-standing support; a pair of rotors, at least one of which is a grinding rotor, the rotors attached to the support to extend in spaced relation at opposite sides of a disc for grinding at least one face of the disc, wherein at least one rotor is pivotally attached to the support and can be moved toward and away from the disc independent of the other rotors; adjustment means attached to the support to allow adjustment of the angle of at least one rotor in relation to a face of the disc; and drive means to rotate at least one of the rotors.

Abstract: A method and apparatus for grinding a workpiece which is supported for rotation about a first axis with a first grinding wheel supported for rotation about a second axis and a second grinding wheel supported for rotation about a third axis. The first grinding wheel engages with the workpiece in a location which is substantially diametrically opposed to the location at which the second grinding wheel engages with the workpiece. Control means are disclosed for controlling the radial grinding force imparted to the workpiece by the first and second grinding wheels so that the force imparted to the workpiece from the first grinding wheel is substantially equal and opposed to the force imparted to the workpiece by the second grinding wheel to prevent distortion of the workpiece.

Abstract: An apparatus is described for machining a conical ring, particularly a friction ring, which has inside and outside conical machinable surfaces having parallel radially aligned generatrices, which apparatus comprises two coaxial machining tools which consist of an outer tool having an inside conical machining surface for machining the outside machinable surface of said ring and an inner tool having an outside conical machining surface for machining said inside machinable surface of said ring, which machining tools are mounted to be rotatable about a common axis relative to said ring and said ring is adapted to be held between said tools so as to be centered on said axis.

Abstract: This knife sharpening machine comprises a supporting framework (2), means (3) of holding a knife (C) on the framework (2) at a sharpening section (4), a pair of disk grinders (10) acting on the knife at the sharpening section (4) from opposed sides thereof, and motive means (22) for rotatively driving the two grinders (10) in opposite directions. Said grinders (10) are carried movably on the framework (2) each along an arcuate path (P), convexedly to the knife (C) position.