Abstract: A machine grinding system is provided for machine grinding the main bearing journals, pin bearing journals, the post surface, gear-fit wall surface, and the flywheel flange surfaces of a four cylinder crankshaft. The system includes three operating stations, each operating station only requiring one machine to maintain the desired production rate. The first operating station machine grinds the main bearing journals, post surface, and gear-fit wall surface; the second operating station machine grinds the pin journals; and the third operating station machine grinds the thrust bearing surfaces and the flywheel flange surfaces.

Abstract: The present invention relates to a grinding machine for grinding a workpiece, in particular cams, with a grinding wheel having a profile with a grinding region running substantially parallel to the axis of rotation of the grinding wheel and at least one profile section which does not run parallel to the axis of rotation of the grinding wheel, a control unit for controlling the grinding process, wherein the control unit is configured in such a manner that, with reference to position information on positions of edges of the workpiece in the direction of the longitudinal axis of the workpiece, the edges of the workpiece are successively deburred or chamfered by the at least one profile section of the grinding wheel during or after the grinding of the workpiece.

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 multi-axis computer controlled machine tool for relief grinding of single and multiple start threaded hobs (46). The machine comprises an angular oriented spindle (65) that can be angularly (swivel) positioned thereby providing the flexibility to utilize both cup-shaped grinding wheels (55) and pencil-shaped grinding wheels (52) for grinding of hob and milling cutter relieved tooth geometry without exchanging grinding spindles assemblies or modifying the machine construction to accommodate two types of grinding methods or utilizing an additional machine axis for the spindle re-orientation.

Abstract: A double-grinding-wheel type drill bit grinding device with a single driving shaft comprising a power source disposed on a base, two grinding wheels being disposed at opposite ends of the single driving shaft extending out of the power source. The grinding device further comprises two pair of first grinding and second grinding seats, each pair of first and second grinding seats being disposed close to the respective grinding wheels at both ends of the driving shaft, a clamping assembly for clamping a drill bit to support the drill bit upon sequential insertion into one pair of the first and second grinding seats, and a positioning device being disposed on a front surface of the base for providing alignment of the drill bit within the clamping assembly prior to the insertion of the drill bit into one pair of the first and second grinding seats. The power source is a pneumatic motor and is provided with a vacuum passage for facilitating dust discharge.

Abstract: An automatic machine and an automatic method for grinding the perimetric edge of rectangular or nonrectangular of glass sheets arranged substantially vertically, comprising at least one conveyor and at least one workhead provided with an abrasive tool for grinding the glass sheet at its edge, following its perimetric profile by way of the relative action of movement of the glass sheet and movement of the at least one workhead. During grinding, the glass sheet is no longer supported and moved by the conveyor but by at least one carriage, to which the glass sheet is coupled by way of at least one sucker.

Abstract: A method and device for grinding a saw chain (26), the saw chain (26) being clamped in a position suitable for grinding. A rotating grinding disc (11) is manually transferred from an inactive position to an active position. Grinding of a cutter link (39) of the saw chain (26) is effected when the grinding disc (11) has assumed its active position. Further, the transfer of the grinding disc (11) from the inactive position to the active position is effected by a rectilinear movement that is carried out by rolling contact.

Abstract: A method and apparatus for creating a groove in the surface of a collector ring for use in an electrical device. The method and apparatus can be used to create a new groove in the surface of a collector ring having none, or can be used to enhance or re-form an existing groove in the surface of a collector ring. In some embodiments, the groove in the surface of the collector ring is created using a cutting tool that has a cutting action that functions independently from the motion of the collector ring. In other embodiments, a masking material is positioned over a portion of the surface of the collector ring to create a masked portion and an exposed portion of the surface of the collector ring. A groove is then created in the exposed portion of the surface of the collector ring. The masking material is then removed from the surface of the collector ring.

Abstract: A portable drill sharpener includes a casing, a sand-wheel, a positioning device, a first grinding unit and a second grinding unit, a holding member for positioning a drill to be ground, a first adjustment unit and a second adjustment unit respectively connected to the first and second grinding units. Each of the first and second adjustment unit includes a guide rail and a sliding frame is movably mounted on the guide rail. The fist and second grinding units have at least one axle along which the first and second grinding units are adjusted.

Abstract: A wheeled trolley carries various tools across an object to be worked. A track attaches directly to the work and simultaneously isolates the tool from the work. A standard connection to the trolley readily accommodates a variety of diverse tools, using a keyway or the like to ensure accurate and repeatable placement of the tools. A preferred contouring guide allows a tool to be moved through an arc, where the focal point of the arc may be set to produce an infinite variety of custom shapes, bevels or angles of cut. An upper stop is provided which readily sets the break line between surface finish and edge contour. An adjustable tool carriage allows control over both position and force, including preloading a work tool with force. Resilience is incorporated into the apparatus to accommodate diverse hardness and abrasion characteristics, and, in at least one embodiment, to enable the track to accurately follow a warped or sagging work piece.

Abstract: A method for forming a cutting edge along an edge portion of a blade stock, wherein the method includes moving the blade stock with respect to a first cutting element rotating about a first rotational axis, the first rotational axis forming one of an acute angle and a perpendicular angle with respect to the cutting edge, and contacting the edge portion and the first cutting element and forming a first cutting surface along the edge portion. The method may also include moving the blade stock with respect to a second cutting element rotating about a second rotational axis, the second rotational axis forming one of an acute angle and a perpendicular angle with respect to the cutting edge, and contacting the edge portion and the second cutting element and forming a second cutting surface along the edge portion so that the second cutting surface intersects the first cutting surface to form the cutting edge.

Abstract: In a process for polishing the chamfered peripheral part of a wafer using a polishing cloth while supplying a polishing slurry in order to improve productivity of the process by reducing a polishing time, at least two steps of polishing processes are performed in sequence. The process comprises a first polishing process to polish a particular part, e.g. the part corresponding to the {110} plane of a peripheral part of the wafer and a second polishing process in which the whole part of a peripheral part of the wafer is polished for finishing by means of varying a hardness of the polishing clothes and/or a particle size of abrasives in the slurry such as the hardness of the polishing cloth in the second polishing process being softer than that of in the first polishing process and a particle size of abrasives in the slurry in the second polishing process being finer than that of in the first polishing process.

Abstract: A honing tool assembly adapted to be chucked in a honing machine for reciprocation and rotation, the assembly comprising a diamond-plated tool for honing cylindrical bores in a workpiece, the diamond-plated tool having a spiral pattern on a cylindrical outer surface, a central bore in the tool adapted to receive a tapered rod engageable with a tapered surface on the central tool opening, the tool being provided with a longitudinal slot that allows the outside diameter of the tool to expand as a force is applied to the tapered rod whereby stock is removed from bore walls of the workpiece with precision roundness and concentricity.

Abstract: A grinding device includes a rotary grinding wheel having an annular grinding surface, a first grinding seat located in front of the grinding wheel, a sleeve disposed rotatably within a through hole in the first grinding seat, an abrasion measuring device for measuring amount of flank portions of a drill bit to be ground, and a tubular holding unit for holding releaseably the drill bit therein. The holding unit is sleeved on the drill bit, is disposed initially in the abrasion measuring device so as to fix position of the drill bit within the holding unit, and is then transferred into the first grinding seat for grinding the flank portions of the drill bit.

Abstract: A circular or non-circular workpiece is ground in a plurality of grinding steps, including a final finish grinding step. A grinding wheel is caused to effect profile generation movement in synchronism with rotation of the workpiece and in accordance with profile data derived from the target shape of the workpiece. In each grinding step, the grinding wheel is advanced in such a manner that the grinding wheel causes cut-in movement within a predetermined cut-in angle defined on the workpiece. After completion of the final finish grinding step, the grinding wheel is retracted over a predetermined back-off angle defined on the workpiece. The retraction is effected in accordance with composite data obtained through combining the profile data and back-off data. The back-off angle is greater than the cut-in angle employed during the final finish grinding step.

Abstract: The present invention relates to a control device to grind a knife shaft used in a machine intended for cutting sheets of materials into strips, for example sheets of paper, plastic, plates of photosensitive film or any other material having the form of thin sheets. The control device according to the invention enables the grinding of the knives of knife shafts of a slitter by checking and controlling the drift of the dimensional differences of position of the knives on the knife shaft and by controlling the variability of the pitches between the knives. This with the goal of obtaining the precision and the quality of cutting required for cut photographic film strips. This device especially finds its principal application in the photographic industry, in particular on grinding machines for the knives of knife shafts equipping the film slitters.

Abstract: The circumferential edge portion of a ductile rotating body containing abrasive grains is used to polish the surface of a ceramic substrate. The angle &thgr; formed between the polishing direction D0 of the ceramic substrate and the rotating direction D1, of the rotating body is set in the range from 10° to 80° for the polishing step. Alternatively, the polishing process is divided into at least two steps. and the average grain size of abrasive grains is reduced stepwise in the successive steps of the polishing process. According to this method, the surface of a large-area and thin ceramic substrate can be polished without damage, and a smooth polished ceramic surface can be provided. This method is particularly suitable for polishing a ceramic substrate having a thickness of at most 2.0 mm, and the resulting polished ceramic substrate is suitable for a ceramic heater in a thermal fixation device for fixing a toner image.

Abstract: A support for supporting a work piece to be machined is provided. The support is for use in a machine adapted to receive fluid from a fluid source. The machine includes a tool for removing material from the work piece. The support includes a body defining a chamber therein and an inlet operably associated with said body. The inlet is in communication with the chamber. The inlet is adapted for communication with the fluid source. The support also includes an outlet operably associated with the body and in communication with the chamber. The outlet is adapted to provide a stream of fluid for supporting the work piece.

Abstract: An edge face of a deposited film at an edge portion of a device wafer having the deposited film formed on a substrate is polished at a substantially right angle so as to prevent the deposited film from peeling-off and dusting. A forming body having a sectional shape substantially agreeing with that of an edge portion of a device wafer after polishing, which is an object to be polished, is rotated and brought into contact with a polishing body so as to form a polishing portion on the polishing body surface. The edge portion of the object-to be polished is rotated and urged into contact with the formed polishing portion, so that the edge portion of the object to be polished is polished in a sectional shape agreeing with that of the polishing portion of the polishing body. The edge face of the deposited film on the substrate surface is polished not slantingly but at a right angel so as to be removed, so that peeling-off of the deposited film due to a post-process, etc.

Abstract: A very versatile device is proposed for high-precision machining of optical workpieces, in particular optical lenses, which comprises a horizontally displaceable gantry with at least one vertically displaceable tool spindle and a yoke with workpiece holding means mounted so as to be rotatable about a swivel axis by means of journals fitted on both sides. For swivelling of the yoke without gearing and therefore without backlash, a torque motor is provided concentrically to the swivel axis, which motor is directly connected actively with one of the journals.

Abstract: Downfeed apparatus in a grinder controlling the grinding wheel down in fast, medium and slow speeds, and up in fast speed. It is fed down continuously in successive passes throughout the grinding operation, and at the end of the grinding, the grinding wheel continues through a spark-out mode at a constant level. A previous control program is held in a memory for later use in an identical operation on an identical workpiece. A monitor presents all steps taken in every mode and every step, and shows progress of movements enabling the operator to manually set and adjust the control apparatus simply and accurately by watching the monitor while making the adjustments. The monitor also continuously presents all movements in an automatic operation.

Abstract: A grinding apparatus of a welded residue on a seam of a rail head portion including a rail, a machine table capable of moving forward and backward along the rail, an apparatus base erected on a distal end side of the machine table, a first support disk board mounted on the apparatus base and capable of moving vertically by electric power or an operator's hand, a second support disk board mounted on the first support disk board and capable of moving vertically by electric power or an operator's hand, a grinding drive motor mounted on a front surface of the second support disk board and capable of rotating about a horizontal axis, a cutter unit mounted on the front surface of the second support disk board and capable of rotating about the horizontal axis, the cutter unit being operatively connected to the grinding drive motor, an engaging portion formed on the cutter unit and adapted to engage a head portion of the rail, and a grinding edge disposed on the engaging portion and adapted to grind an upper surface,