Abstract: A cutting segment adapted for mounting on a circular cutting wheel is disclosed, and which is characterized by its ability to provide a grooved cutting surface that accurately guides the circular wheel to which it is attached through stone, concrete or the like. The cutting segment includes a unitary solid metallic body that has a top wall which defines a cutting surface, a bottom wall opposite the cutting surface, two opposite flat side walls and two opposite end walls. At least one of the end walls includes a recessed channel which extends between and intersects the cutting surface and the bottom wall. The channel defines a central portion on the cutting surface that is contiguous with the intersection of the channel, and two flanking portions on opposite sides of the central portion.
Abstract: Abrasive grinding apparatus wherein abrasive heads rotate about axes inclined at forty-five degrees to the longitudinal axis of a parts conveyor mat and in orthogonal relation to one another. Watering tracks positioned in overlying axially parallel relation to the abrasive heads and in transverse relation at the end and beneath the conveyor mat wash the exiting parts and the conveyor mat. Parts engaging pressing members comprised of a plurality of spring biased support frames each bearing a rotative, longitudinally displaced belt and having beveled sides adjacent the abrasive heads guide and maintain the parts in contact with the conveyor mat as they are transferred to and from the abrasive heads.
Abstract: A fixture for dressing the polishing surfaces of a platen to maintain it in a planar condition, including a flexible carrier which is adapted to be rotated independently of the rotation of the surface to be dressed, with the carrier providing an opening for the placement therein of a dressing pad. About the edges of the opening there are provided a plurality of driving keys which will engage appropriate edge surfaces of the dressing pad for effecting rotation of the dressing pad with the flexible carrier relative to the surface to be dressed.
Abstract: For dressing a rotating grinding wheel which grinds a workpiece held in a chuck, there is mounted on an extension of the chuck, an annular dressing tool having an inner lining of diamond, for example. The dressing annular is accurately centered relative to the workpiece. The grinding wheel is moved through the short distance between the workpiece and the dressing annulus.
Abstract: An orbital barrel finishing machine employs rotatable drums which are removable from the machine. A coupling member mounting a plurality of angularly spaced axially extending pins engages slots of a second coupling member to provide a rotational drive engagement for the removable drums. The drums are uncoupled from the drive engagement by axially displacing the drums. A releasable latch assembly is employed to secure the drums in the coupled drive position. The orbital barrel finishing machine is employed as a component of an integrated automatic finishing system wherein the rotatable drums may be automatically removed from the machine, unloaded, loaded and returned to the machine.
Abstract: A higher performance, lighter and thinner composite sawing disc for stony materials is made by assembling, preferably by bonding, a peripheral rim (2) provided with diamond segments (6) on a self-supporting, metallic honeycomb structure (3) strengthened at its center by a central ring (4). Excellent strength of the assembly is obtained by bonding annular discs (5) of thin plate to the lateral faces.
Abstract: The saw blade mount is provided with a stabilizer blade mount for imposing an axial force on the saw blade to eliminate unevenness in the saw blade. The stabilizer blade mount includes a gasket ring of plastic or elastomeric material which is abutting against the saw blade and which faces an opposing surface of an inner clamping ring. Adjustment screws permit adjustment of the stabilizing ring relative to the saw blade either completely about the periphery or only at localized regions.
Abstract: A nonwoven fiber abrasive disk is formed with a hole in the center, from flexible fibers randomly oriented in all three dimensions. The abrasive disk has compressed regions that radiate out from the center to the perimeter, with uncompressed abrasive regions located between them. The fibers in the compressed regions are densely pressed together and hardened with bonding adhesive introduced into the gaps between those fibers, such that the disk thickness in those regions is less than that in the uncompressed abrasive regions. The abrasive regions of the disk, which are thicker than the compressed regions, protrude out to form the abrasive surface.
Abstract: A flexible grinding cell in-process gage system includes a pallet assembly and gage bench fixture assembly with means to preset the gage for subsequent use at a grinding station. The preset pallet and gage are operated at the grinding station to produce a signal to compensate for any pallet mis-alignment at the grinding station prior to an automatic machining sequence.
Abstract: Flow valve seat grinding apparatus incorporating an improved steady rest means. Includes a tubular drive shaft housing which houses and supports a rotatable and longitudinally movable drive shaft means. Drive shaft is connected through a flexible torque coupler to drive a valve seat grinding head. Grinding head is adapted to grind a valve seat located within a valve body. Includes adjustable anchor operable to laterally extend at least three anchor members into fixed anchoring contact with a sidewall of a valve body to laterally support the shaft housing in fixed position within the valve body.
Abstract: A machine for grinding the cavity in a mold for optical lenses has a spherical grinding tool which is precisely positioned with respect to the center line of a rotary table upon which it is mounted by air slides, which air slides move the tool in orthogonal directions. The carriages of the air slides move relative to center rails. A film of air between the top plate of each air slide and the center rail is supplied at a pressure which supports the weight on the carriage. When precise alignment between the grinding tool and the center line is obtained, a first air supply is cut off and a second air supply is maintained to lock the air slides in the position of alignment.
Abstract: A method and an apparatus for severing a workpiece into wafer slices, wherein the inclined surface to be cut can be processed to remove protrusions or impressions which occur around the cut surface. The workpiece has a front end portion which is cut by a cutting tool and a rear end portion which is inclined with respect to the central position of the surface of the workpiece to be cut. This central position is the center of rotation about which the workpiece is rotated to generate a cone shape. When the workpiece is fed axially for cutting to obtain wafers, the central position of the workpiece surface to be cut is held at a constant position so that the workpiece can be cut continuously at a constant angle of inclination. The front end portion of the wafer being cut is rotated while being pulled in a direction from the workpiece until the completion of the severing operation.
Abstract: A centerless grinding system comprises a driven grinding wheel, a driven regulating wheel, and a work rest blade for centerless grinding of a workpiece supported by the work rest blade between the grinding wheel and the regulating wheel; means for determining the rate of reduction of the workpiece radius while it is being ground; and means responsive to the rate of reduction of the workpiece radius for controlling the ratio of the power consumed in removing workpiece material to the rate of removal of workpiece material by the grinding wheel. The regulating wheel is preferably fed toward the grinding wheel to feed the workpiece into the grinding wheel. In a similar center-type grinding system, the workpiece is mounted on spindles or chucks which are movable toward the grinding wheel so that the workpiece can still be fed by the regulating wheel.
Abstract: A tumbling media element for use in tumbling non-magnetic workpieces includes a body portion formed of a non-magnetic material and a magnetic insert disposed within the body portion. The insert renders the body portion suitable for magnetic sorting techniques and may increase the total mass of the media element thereby generating greater kinetic energy during tumbling operations.
Abstract: The invention relates to a displaceable protective cover for handtools using rotary, disc-shaped tools. The protective cover comprises two halves (7,8) which completely enclose the tool (3) when in their rest position. The cover-halves (7,8) can be rotated to an open position against the action of a spring force, and are connected to a latching mechanism (11,12), arranged to lock the cover-halves against further rotation when either of the cover-halves (7,8) is subjected to an impact force.
Abstract: In a numerical control grinding machine using a grinding wheel made of cubic boron nitride, a computerized numerical controller controls the infeed movement of a wheel head to effect a rough grinding and a first fine grinding on a rotating cylindrical workpiece by the grinding wheel and to halt the first fine grinding in response to a sizing signal from a sizing device which measures the diameter of the workpiece being ground. At the halt of the first fine grinding, the numerical controller advances rest jaws to press the workpiece upon the grinding wheel until another sizing signal is issued from the sizing device. Until the number of the workpieces ground after each truing operation reaches a predetermined number, the numerical controller increase the infeed rate of the grinding wheel in each of the rough and first fine grindings toward a desired infeed rate on a step-by-step basis.
October 30, 1986
Date of Patent:
December 8, 1987
Toyoda Koki Kabushiki Kaisha
Toshio Tsujiuchi, Yoshinori Shinmura, Yukio Oda
Abstract: A numerically controlled grinding machine equipped with two registers in which data concerning the positions of the cylindrical and shoulder grinding surfaces of a grinding wheel is stored. A reference point is established on the wheel spindle stock. A reference member having two reference surfaces is disposed on the worktable. The machine further includes a manual pulse generator for moving the grinding wheel head and the worktable, detectors for detecting the distances traveled by the wheel head and the worktable, a data entry device, an arithmetic processing unit, and a memory.
Abstract: A method for manufacturing a spectacle-glass for myopes, starting for simplicity sake from a semi-finished glass, that is a glass having on the inner side, a slight concave hollowing, which comprises computing according to the desired diopter value, the required curvature, and with torus-like grinding, the so-called cross-curvature, and computing according to the desired field of view, a second curvature, whereafter the glass is arranged in a generator and a center hollowing is milled according to the basic curvature, while thereafter the glass edge around the center hollowing is milled according to said second curvature, and the center hollowing of the thus-machined glass is finished, respectively polished, by using a tool with convex radiusing which corresponds to the basic curvature, whereafter the edge is subjected to at least one finishing operation and one polishing operation by using an implement with a convex radiusing which corresponds to said second curvature, whereby moreover use is made of a resil
Abstract: Described is a technique and associated fixture for lapping magnetic recording heads in a group such that each head is mounted on a "free floating" part in the fixture, being biased for lapping only by the weight of this part and being individually removable during lapping mode; and also characterized by capability for pivoting the fixture to change the lap-angle of all such heads in common to a new constant prescribed angle, the parts also being selectibly kept non-rotatable in the fixture.
Abstract: An operator's panel for a numerical controller of a grinding machine comprises a main frame of a generally box shape, which is carried on a front portion of a bed of the grinding machine for pivotal movement about a horizontal axis. A manual pulse generator for supplying the numerical controller with pulse signals is mounted in the main frame, and a manual feed handle is secured to an input shaft of the pulse generator. A mechanism is further provided for locking the main frame at such an angular position as desired by an operator of the grinding machine.