Abstract: A method for the surface finishing of a part or workpiece with loose particulate finishing material or media comprising the steps of providing a first body of finishing media, providing a second body of finishing media, said first body and said second body being in side-by-side juxtaposition with respect to each other, independently imparting vibratory action to each of said first and second bodies of finishing media to impart relative motion to the particular segments thereof and to cause portions of said first and second bodies to impinge upon each other, and subjecting the part or workpiece to the action of said finishing media for the surface finishing of said part or workpiece while said finishing media is in motion, preferably by fixturing said part or workpiece and passing said part or workpiece through the finishing media, and preferably wherein orbital motion is imparted to each of the said bodies of finishing media, especially orbital motion which is other than unidirectional, particularly when the

Abstract: A wafer holding chuck for a wafer sectioning machine is provided with a substantially flat chuck plate having an extremely flat resilient strip support for supporting only a very small area of the wafer above the surface of the chuck plate at a point opposite the rotating abrasive tool. The pressure of the highly accurate rotating abrasive tool engages the front surface of the wafer to be sectioned and the resilient strip support conforms to the rear surface of the wafer causing the abrasive tool to make uniform contact with the front surface of the wafer being sectioned so that the section cut in the wafer is extremely uniform.

Abstract: This invention is concerned with ultra precise apparatus for forming a complex profiled face on a diamond tool blank. The apparatus comprises an abrading device in the form of a grinding wheel and a spindle means which includes a journal for supporting the grinding wheel. This journal is rotatably supported upon an air bearing. A platform, supported for rotation about a vertical pivot axis, is also supported for displacement in a horizontal plane along an axis perpendicular to the pivot axis. An air bearing supports the platform for rotation about the pivot axis while another air bearing supports the platform for displacement in the horizontal plane perpendicular to that axis. A tool chuck is mounted upon the platform and serves to present the tool blank to the grinding wheel. A cam, mounted adjacent to the platform, is provided with a surface whose contour is related to the complex profiled face to be formed on the tool blank.

Abstract: A fluted twist drill point splitting/web thinning apparatus is disclosed which permits simple point splitting/web thinning of conventional sharpened twist drills. The apparatus is uniquely designed such that either of the two operations, that is point splitting or web thinning, can be simply and accurately carried out with the same assembly. The apparatus also includes the provisions of a grinding wheel dressing diamond mounted on a forward face of the apparatus.

Abstract: A method and apparatus for cutting a hard and brittle material using a system for applying vibration in two directions with a strip-shaped flat cutting tool. The material to be cut is caused to make a reciprocating motion of a given stroke length together with a first small-amplitude, low frequency vibration in directions parallel to the reciprocating motion. Concurrently with this, a second small-amplitude vibration is applied also to the material to be cut in directions parallel to the cutting direction of the cutting tool into the material and in synchronism with the first small-amplitude vibration. Meanwhile, cutting pressure is applied to the cutting tool to a desired degree with a cutting fluid containing abrasive grain supplied to the cutting part of the material during the process of cutting.

Abstract: A grinding machine is provided wherein a pair of wheel slides are disposed respectively at both sides of a work support to be movable toward and away from the work table in a first direction. The wheel slides respectively carry turrets thereon in such a manner that each of the turrets is rotationally indexed about and slidable along an axis thereof extending in a second direction perpendicular to the first direction. Each of the turrets carries a plurality of grinding wheels which are rotatable about respective axes extending in the second direction, and when rotationally indexed selectively presents the grinding wheels to a machining station. The position of a selected one of the grinding wheels relative to a workpiece on the work support is adjusted in the first direction through the movement of each wheel slide and in the second direction through the movement of each turrets.

Abstract: A center lapping apparatus for precisely lapping center holes in opposite ends of the workpiece prior to outside diameter grinding of the workpiece includes a conical lapping stone and a dressing apparatus that supports a dressing stone for periodically dressing the lapping stone. Movement of the dressing stone during any dressing operation is confined to a plane in which an axis of symmetry of the lapping stone lies. A spring loaded pin disposed in a movable head of the dressing apparatus has a slightly tapered end which precisely fits in a stationary hole of a mounting bracket about which the movable head pivots. The tapered end of the spring loaded pin ensures that the dressing stone can always be returned to precisely the same position for a dressing operation despite wear of the spring loaded pin. A precise flat surface of the moveable head slides against a precision flat surface of the stationary plate during pivoting of the movable head.

Abstract: An apparatus is presented which will automatically lap involute and strai internal or external gear splines. Lapping force is applied alternatively to the left and right side of each tooth flank. Automatic indexing to new radial positions about the circumference of a gear after any preselected number of lapping cycles accomplishes the application of equal lapping forces to each tooth.The apparatus comprises a bed or support frame upon which is mounted a headstock assembly and a tailstock assembly. Mating workpieces, e.g., mating involute or straight internal or external gear splines, are fastened through collets to the mechanisms of the headstock and tailstock assemblies. The tailstock assembly includes a mainshaft attached to the collet holding its workpiece. The mainshaft is driven by a pneumatic piston to reciprocate along the axis of the workpiece causing the workpieces to lap one another.

Abstract: A link and flight assembly for a blast chamber conveyor is disclosed. The assembly includes a flight having a first surface formed of blast resistant materials, such as manganese. The flight is T-shaped in cross-section and is connected to the link by a mounting arm secured to the portion of the flight which is not subjected to blasting. This permits the use of inexpensive materials to join the link to the flight bar.

Abstract: A relatively low cost twist drill sharpener apparatus employable with a rotary grinding wheel has a twist drill alignment fixture which positions the drill with respect to the drill holding chuck. The twist drill holding chuck has mounted thereto one or a pair of cam elements which cooperate with a sharpener fixture which is adjustable for height, pivotal motion and backward and forward motion relative to the rotary grinding wheel. The fixture has mounted thereto a second cam and is adapted to receive the twist drill chuck and control the grinding of the twist drill when the chuck is pressed toward the face of the grinding wheel and rotated clockwise. The fixture and the chuck are also adapted to receive a wheel dressing element.

Abstract: A sanding device for use with a drill press having a drum divided diametrically into half sections. The drum is covered by a unitary layer of resilient rubber-like material such as neoprene. The cover hinges the drum halves together along one side of the drum. When an abrasive sheet has been installed on the device, the two halves are joined together by a nut threaded onto a short shaft which projects from each end of the drum. The upper nut has a metal shaft extending coaxially from the nut and this shaft can be used to attach the device to a drill press chuck or directly to a shaft. The mechanism for attaching the abrasive sheet includes two slots each of which extends from the diametrical surface of a respective half section. Each slot extends the length of the drum and is adapted to accommodate one end of the abrasive sheet.

Abstract: A machine for surface finishing wood veneer feeds the veneer to a grinding drum positioned over a rigid bed plate. A continuous loop feed belt carries the veneer to and away from the bed plate but passes thereunder to permit a rigid gap between the bed plate and the drum grinding surface. The drum is carried on a swing arm that is independently driven about an arc between a working position and a retracted, repair position.

Abstract: A chuck for suspending a specimen holder from a vertical drive shaft to permit the specimen holder to be rotated about the axis of the drive shaft and also pressed downwardly against an abrasive platen or the like which may also be rotated in the same or opposite direction, the chuck being biased to its locking position by a spring and being releasable through manual rotation of a sleeve member to overcome the spring force.

Abstract: A belt grinder cooling method and apparatus featuring specially controlled flows of a coolant liquid--one in the interface region between the working run of the belt and a supporting platen, another in the interface region between a workpiece and the belt's working run, and a third onto the belt downstream from where the belt contacts a workpiece.