Abstract:
An apparatus for abrading or deburring a workpiece is provided and includes in combination a conveyor for moving the workpiece from a first position to a second position and at least two assemblies intermediate the first and second positions and opposite the conveyor for abrading one side of the workpiece in a plurality of directions. In an alternate embodiment of the invention, a third assembly may be provided which deburrs an opposite side of the workpiece as it is passed through the deburring assembly. The conveyor for moving the workpiece positively fixes the location of the workpiece with respect to the conveyor and translates the workpiece through the deburring assembly.
Abstract:
A wafer polishing apparatus includes a module frame; a continuous belt rotatable with respect to the frame, the belt having at least one vertically-oriented belt transverse portion including a polishing pad assembly; and at least one pivotable wafer-holding head drive within the frame and having a distal end portion movable to a vertical first position parallel and juxtaposed to the belt transverse portion. The head drive includes a wafer carrier for holding a wafer on the distal end portion of the head drive, while a drive moves the distal end portion and a held wafer into a vertical polishing position abutting the belt transverse portion and pressure is applied to the held-wafer against the polishing pad assembly while the wafer-holding distal end portion is rotated and swept side-by-side. After polishing the drive is reversed and the head drive is pivoted away from the belt transverse portion to a horizontal or other orientation and the then polished wafer removed. Multiple modules may be placed end-to-end or side-by-side with a robot pathway therebetween to load unpolished wafers and to unload polished wafers to a buffing station, to a cassette or other processing station.
Abstract:
A disk texturing apparatus for texturing surfaces of a magnetic disk or the like with cross-pattern grooves. The texturing apparatus is basically constituted by a rotational drive having a spindle for supporting and rotating a disk, and a tape transport mechanism for moving a texturing tape across and in pressed with a texturing surface of said disk. The spindle of the rotational drive mechanism is arranged to hold a disk in an eccentrically deviated position off the rotational axis of the rotational drive. As a result, the disk is revolved along an eccentrically deflecting orbit around the rotational axis of said rotational drive while being rotated with the spindle, moving in and out in radial directions in a degree commensurate with the amount of deviation from said rotational axis to form cross-pattern grooves on the disk surface.
Abstract:
A wafer polisher and method for the chemical mechanical planarization of semiconductor wafers. The polisher includes a wafer holder for supporting the semiconductor wafer and a linear polishing assembly having a polishing member positioned to engage the surface of the wafer. The polishing member is movable in a linear direction relative to the wafer surface to uniformly polish the surface of the wafer. A pivotal alignment device may be used to pivotally support one of the wafer holder and the polishing member relative to the other of the wafer holder and the polishing member with the surface of the wafer and the polishing member retained in parallel alignment during operation of the polisher. The polisher optionally includes a conditioning station for conditioning the polishing member.
Abstract:
Methods for treating surface faults and impurities on metal stock which has been subjected to hot working are disclosed in which the hot metal stock is subjected to grinding from an endless abrasive belt while the hot metal stock from the hot working step remains at a temperature of between about 500.degree. and 1500.degree. C., and the desired grinding pressure is applied to the hot metal stock during the grinding step by means of a contact device in which the applied pressure is created by a fluid so that the contact device remains in floating contact with the hot metal stock during grinding. Apparatus for treating surface faults and impurities on such hot metal stock are also disclosed.
Abstract:
A method of producing a magnetic disk by lapping a magnetic disk medium, comprising the steps of:preparing a lapping tape having an abrasive particle layer provided with abrasive particle clusters and chip pockets formed between adjacent two clusters, each of said clusters having abrasive particles of Al.sub.2 O.sub.3 or SiC and abrasive particles of diamond,lapping the surface of said magnetic disk medium by using the thus prepared lapping tape.
Abstract:
A wood surface treatment system comprising a tandemly arranged endless abrasive cross-belt and flexible rotary abrading surface treating apparatus wherein the abrasive cross-belt portion of the system which includes a platen assembly arranged to move in an oscillatory or epicyclic pattern relative to the work surface and wherein the flexible rotary abrading portion of the apparatus includes a pair of angularly disposed rotary abraders, such as cylindrical brushes. The axis of each individual flexible rotary abrader is disposed at an acute angle, preferably 45 degrees, to the axis of the conveyor, with the individual axes being preferably disposed at 90 degrees, one to the other. The cross-belt portion of the apparatus preferably includes means for drivably oscillating the platen.
Abstract:
A belt driven feed assembly having a plurality of floating passive pinch wheels and a plurality of floating drive wheels, staggered and offset from one another, for conveying flat stock having irregular upper and lower surfaces. The drive and pinch wheels coact with one another and the belt to vertically center the flat stock relative to a stationary milling assembly, whereby irregularities in the upper and lower surfaces are removed so as to obtain finished flat stock with relatively smooth and parallel upper and lower surfaces.
Abstract:
A surface grinding method in a first embodiment of which a workpiece supported on a surface (56) is rotated about a vertical axis while being translated along ways (46, 47) past a cutting head (22) comprising an abrasive belt (71) driven about a drum (72) to have a working edge (17) skewed with respect to the direction of the ways. In other embodiments the workpiece (100) is fed axially into the belt (106), which may be oscillated transversely to the direction of feed, and the workpiece may be moved, in the direction of the working edge, out of engagement with the belt while the belt and workpiece are in motion.
Abstract:
An abrasive grinding machine (11) is disclosed which comprises workpiece conveying means (14) carried in a horizontal position by a frame (12) with a grinding head (15) disposed in overlying relation thereto. The conveying means (14) includes a flexible endless conveyor belt (22) the upper flight of which passes over a rigid planar backing surface. The grinding head (15) includes an abrasive belt (27) that moves in a direction opposite the conveyor belt (22). A back-up roller (31) is rotatably disposed in a recess (21) in the bed (13) in opposition to a drive roller (28) of the grinding head (15). The back-up roller (31) slightly elevates the conveyor belt (22) from the rigid support surface of the bed (13). The belt (22) is thus able to deflect and conform to a warped or twisted workpiece as it moves through the grinding area, resulting in uniform deslagging of each workpiece.