Abstract: A lapping machine that can reproduce novel lapping patterns for generally spherical workpieces. The lapping machine replicates the motions commonly used in manual lapping, but with full reproducibility. The desired patterns of lapping are representative of roulette curves, and the present disclosure describes a novel means to produce roulette curve lapping of spherical workpieces by machine. The lapping machine may utilize a free rolling spherical lap arrangement in the lower unit and a telescopic rod and spherical lap in an upper unit. Different tools for holding the workpiece allow for easy adjustment to a variety of work piece sizes and shapes.

Abstract: Method for determining movement data representing the movement of a machining tool of an optical lens 3D machining device for machining a surface of an optical lens, wherein the method comprises: a machining tool data providing stage, a surface data providing stage, a machining rule providing stage, a 3D surface determining stage in which the 3D surface corresponding to the surface consisting of all the positions of the reference point of the machining tool that allow the profile of the cutting edge of the machining tool to tangent the derivable surface of the optical lens is determined, a movement data determining stage.

Abstract: A piston processing apparatus includes a work attaching head capable of fixing a piston material, a work rotating device, a grinding wheel, a grinding wheel rotating device, first and second moving mechanisms for moving the grinding wheel, a rotational angle detector for detecting a rotational angle of the work attaching head, a first and second position detectors for detecting a position of a grinding surface of the grinding wheel, a controller controls the first and second moving mechanisms to grind the outer circumferential surface by the grinding wheel based on target-position information of the grinding surface corresponding to a position on the outer circumferential surface of the piston material. According to the piston processing apparatus, the outer circumferential surface of the piston material can be processed into a three-dimensional shape with high-accuracy, and a piston that can improve fuel efficiency.

Abstract: A method for machining a face (1) of an optical object (6), includes providing a machine tool which itself includes a bed (1) for locating an object to be machined. The bed (1) has a receiving surface (3) that is angularly adjustable about an axis perpendicular to the receiving surface (3). A spindle (8) is suitable for rotating a machining tool (9) about an axis essentially parallel to the receiving surface (3) of the bed (1) and is suitable for moving the machining tool (9) translationally in a plane essentially parallel or perpendicular to the receiving surface (3) of the bed (1).

Abstract: A machining apparatus, in which a plurality of user set programs in relation to one axis is written and the amount of the infeed motion of the grinding wheel is increased to restrain the change of the load of the grinding wheel, improves a machining accuracy and achieve a longer life of the grinding wheel.

Abstract: This disclosure concerns a device for machining surfaces, e.g., superfinishing, polishing, grinding or lapping spherical shells or flattened domes of a workpiece, or, for example, a ball joint, using a tool having a machining stone with a workpiece receiver, a first drive for an oscillating motion about a first axis of the workpiece, a tool holder and a second drive for an oscillating motion about a second axis of the tool holder, whereby the axes are an angle to one another.

Abstract: An electrophotographic photoreceptor substrate which can be easily produced with high productivity and prevents the occurrence of image defects, and which has fine grooves formed in the surface thereof and is characterized in that the grooves are curved and discontinuous when the substrate surface is developed on a plane.

Abstract: A flexible micropolishing machine for micropolishing a piston ring comprising an arbor for accepting at least one piston ring, a means for rotating the arbor, a flexible roller arm located adjacent the arbor, and an indexable abrasive material located between the flexible roller arm and the at least one piston ring wherein the flexible roller arm is movable toward the arbor such that flexible roller arm applies a micropolishing pressure to the indexable abrasive tape thereby micropolishing the piston ring.

Abstract: An apparatus for polishing an optical surface, in particular an optical surface of a spectacle lens, is disclosed. The apparatus comprises a polishing head having a polishing tool, the polishing tool being provided along a common axis, one behind another, with a first preferably rigid member, a second elastic member, and a polishing lining, each extending essentially radially relative to the axis. The second elastic member is configured to be increasingly soft in a radial outward direction. Moreover, a method of polishing an optical surface, in particular a surface of a spectacle lens, an optical component manufactured according to that method, in particular a spectacle lens, as well as a method of manufacturing a polishing tool are disclosed.

Abstract: In a coarse honing step in a section (101), a honing head (15) provided with coarse honing hones (17) is inserted into a cylinder bore (13) of a cylinder block (11), the honing head 15 is rotated while axially moving it, and the inner peripheral surface of the cylinder bore (13) is thereby ground. In the next idling step in a section (102), the cylinder block (11) is left as it is for (60) seconds to generate a springback (S). In a subsequent finishing honing step in a section (103), a honing head (21) provided with finishing honing hones (19) is inserted into the cylinder bore (13), the honing head (21) is rotated in a reverse direction to a rotational direction in the coarse honing step while axially moving it, and the inner peripheral surface of the cylinder bore (13) is thereby ground. Further, a coolant is supplied to the sections of the coarse honing step, the idling step, and the finishing honing step from coolant nozzles (23), (25), and (27), respectively, using a common coolant supply source (29).

Abstract: A method of forming a mold for forming a resinous domed article which may be employed as a cover of a monitor camera is provided. The mold consists of a female block and a male block. The female block has formed therein a domed mold cavity which includes a hemispherical wall that is just half a sphere and an annular wall extending from an end of the hemispherical wall. The male block has a domed protrusion mating with the domed mold cavity of the female block. The domed protrusion consists of two parts; a hemispherical portion and a cylindrical portion. The hemispherical portion is mechanically joined to the cylindrical portion. This structure allows the surface of the domed protrusion of the male block to be formed smoothly without any irregularities on an interface between the hemispherical portion and the cylindrical portion.

Abstract: A grinding machine comprises a grinding member having a thickness greater than 10 mm and an outer contact surface extending in a thickness direction of the grinding member for contacting a surface of a workpiece. The grinding member is supported by a first rotational shaft for rotation about a first rotational axis. A first moving mechanism reciprocates the first rotational shaft along a first displacement axis. The workpiece is supported by a second rotational shaft for rotation about a second rotational axis perpendicular to the first displacement axis and the first rotational axis. A second moving mechanism moves at least one of the workpiece and the grinding member along a second displacement axis to bring the outer contact surface of the grinding member into linear contact with the surface of the workpiece to grind the workpiece. The linear contact between the outer contact surface of the grinding member and the surface of the workpiece has a contact length greater than 10 mm.

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

Abstract: When a face portion of a CRT glass panel is polished by fixing the glass panel on a rotating table and pushing a rotating cylindrical drum type polishing tool, which is supported by a supporting frame, to the face portion, the supporting frame is swung around a pivotal point so as to swing the polishing tool along an arc line on the face portion of the glass panel, and the polishing tool is moved reciprocately in a horizontal direction in association with an angle of rotation of the glass panel. Therefore, the face portion is polished while the distance between the rotation axis of the polishing tool and the center of the glass panel is changed. Since deflection of wearing of the polishing tool is decreased, the service life is prolonged, and further efficiency of polishing is improved.

Abstract: The present invention relates to a method for grinding grooves in the peripheral surface of rollers roller guides for rolling mills. The roller (2) of a roller guide is caused to rotate while retained on its own bearing (8,9,10) as the peripheral groove is ground.The invention also relates to an apparatus for carrying out the method, and to a roller guide structure with which the method can be applied.

Abstract: A machine for scraping tire treads comprising two units (10, 30), one (10) upper and one (30) lower, arranged according to a vertical axis (y--y) for the handling and positioning of a tire (2) in a symmetrical position relative to a horizontal axis (z--z) and for operating the tire in rotation around an axis of rotation coinciding with the vertical axis of such handling and operating units (10, 30). There is further provided a unit (20) for work tools (21) placed in rotation around a vertical axis parallel to the axis of rotation of tire (2) and automatic means (5, 5a) for loading/unloading tire (2) on/from lower supporting and positioning unit (30).