199 results about "Superfinishing" patented technology

An abrasive super-finishing method for workpieces, such as metallic thin-film magnetic discs, employs a polishing / texturing material having a backing, such as synthetic resin film or woven material or non-woven cloth, and a layer which can hold abrasive grains on the backing, such as flocked fibre or a porous polymer foam, on one surface of the backing. An electrolytic solution in which abrasive grains are suspended is supplied to the polishing / texturing material to conduct polishing or texturing of the workpiece surfaces. The workpiece is connected to an anode and a pressure roller or a cathode bar is connected to a cathode. A voltage is applied between the workpiece and the pressure roller or cathode bar to conduct simultaneously electrolytic polishing and abrasive polishing / texturing.

It is an object to provide a cutting tool which can perform high-quality, high-efficiency machining of a workpiece such as hardened steel.The cutting tool includes a finishing cutting edge 6 which initially cuts into the workpiece, and superfinishing cutting edges 7 for finishing the workpiece cut by the finishing cutting edge. The superfinishing cutting edges 7 project from the finishing cutting edge by a predetermined amount B in such a direction that the depth of cut of the superfinishing cutting edges increases. Each superfinishing cutting edge includes a burnishing portion 7a having a predetermined width L in the feed direction of the tool, and a wiper portion 7b. The superfinishing cutting edges 7 burnish the finished surface formed by the finishing cutting edge, while removing a affected layer formed by the finishing cutting edge.

The invention discloses a method for superfinishing of a metal part with a thin-wall large curved surface. The method comprises the steps of numerical control processing, preliminary detection, primary polishing, primary detection, secondary polishing and secondary detection and the like. The part does not need to be clamped in the superfinishing process, and deformation caused by the clamping is avoided; and simultaneously due to the fact that the part is not subjected to cutter cutting, curved surface deformation caused by stress in the processing is avoided. Superfinishing is performed on the metal part with the thin-wall large curved surface through the processing steps of polishing and detection and the like, and the requirement of the surface profile within 0.015 and the requirement of surface roughness of below Ra0.2 are met.

Provided is a superfinishing method for the outer circle of a high-precision cylindrical part. A machining device for achieving the superfinishing method comprises an upper grinding disc, a holder and a lower grinding disc, wherein the holder is located between the upper grinding disc and the lower grinding disc, the rotating shaft of the upper grinding disc and the rotating shaft of the lower grinding disc are coaxially arranged, a certain offset distance exists between the axial line of holder and the upper grinding disc and between the axial line of the holder and the lower grinding disc, and the holder is connected with a holder driving crank shaft. The upper grinding disc, the lower grinding disc, the holder and the holder driving crank shaft can all independently rotate according to the respective speeds. A cylindrical part to be machined is arranged on a working position of the holder, the center of the holder carries out obit motion around the rotating shaft of the upper grinding disc and the rotating shaft of the lower grinding disc under the driving of the holder driving crank shaft, and meanwhile the holder maintains spin notion around the center of the holder. The cylindrical part carries out complex space rolling and rotational motion under the driving of the holder, the upper grinding disc and the lower grinding disc. Machining load is applied to the cylindrical part through the upper grinding disc. Superfinishing is carried out on the outer circle of the cylindrical part by matching the plane of the upper grinding disc and the plane of the lower grinding disc with grinding materials. According to the superfinishing method for the outer circle of the high-precision cylindrical part, evenness and machining uniformity are good.

A superfinishing method for a tapered roller bearing, comprising the steps of: rotating the outer ring of the tapered roller bearing around the central axis of the tapered roller bearing; inserting a right-angled superfinishing stone from the front of the outer ring; and The front end face of the superfinishing stone is in sliding contact with the surface of the conical race formed on the inner peripheral surface of the outer ring, and thereby superfinishes the race surface. The super-finishing stones are inclined to the outside in front of the outer ring corresponding to the vertical line of the race surface.

A method for superfinishing a high density carbide steel component using chemically accelerated finishing is provided. The high density carbide steel component is vibrated in a vessel containing a plurality of media, with active chemistry being added to the vessel at a low flow rate. An active chemistry composition is also provided, consisting of one or more conversion coating agents having preferably a phosphate radical, and one or more chelating agents preferably including citric acid.

A coated abrasive product includes green, unfired abrasive aggregates having a generally spheroidal or toroidal shape, the aggregates formed from a composition comprising abrasive grit particles and a nanoparticle binder, wherein the abrasive aggregates are dispersed within a polymer resin coating, and wherein the coated abrasive product is capable of superfinishing a metal surface having an initial Ra in the range of about 1.5 micro inches to about 12.5 micro inches prior to application of the coated abrasive product and after application the surface has an Ra of less than 1.0 micro inch.

The invention has a structure: a control device 6 composed of a computer is connected with a detection part of a matching device 32, thus sending detection signals that represent measured values of the diameter of the raceway of an outer ring and the raceway of an inner ring; the control device 6 is further connected with a second grinding process device 24 in the outer ring, a superfinishing device 25a in the outer ring, a second grinding process device 26 in the inner ring and a superfinishing device 28a in the inner ring, so as to be convenient for receiving control signals; according to the measured values of the diameter of the raceway of the outer ring and the raceway of the inner ring that are measured by the detection part, the control device 6 provides change values to diameter-processing target values which are respectively set for the grinding process device 24 (or 26) and the superfinishing device 25a (or 28a) that are used for processing roll surfaces of at least one roll wheel in the outer ring and the inner ring.

Disclosed herein is a new improved large planetary gear system used on the input stage of wind turbine power generators. This improved planetary gear system reduces or eliminates lubricant debris traditionally generated from the gear teeth, thereby eliminating an initiating source for bearing failure. To achieve these results, some and preferably all of the gear teeth within the planetary gear system are superfinished using chemically accelerated vibratory finishing to a surface roughness of approximately 0.25 micron or less. Several objects and advantages of the invention are to provide a gearbox with reduced metal debris, improved bearing life, reduced wear, reduced vibro-frictional noise, improved contact fatigue, improved fretting resistance, improved lubrication, to simplify the run-in process, and to enhance the durability and efficiency of the gearbox.

A detection unit of a matching apparatus 32 is connected to a control unit 6 of a computer so that a detection signal indicating measured values of diameters of outer and inner ring raceways can be sent thereinto. An outer ring secondary grinding apparatus 24, an cuter ring super finish machining apparatus 25a, an inner ring secondary grinding apparatus 26 and an inner ring super finish machining apparatus 28a are connected to the control unit 6 so that control signals can be received. The control unit 6 imparts shift amounts to diameter machining target values which are set, respectively, in the grinding apparatus 24, 26 and the super finish machining apparatus 25a, 28a for machining a raceway surface of at least one bearing ring of outer and inner rings, based on measured values of diameters of the outer and inner ring raceways which were measured by the detection unit.

The invention discloses an outer-diameter superfinishing machine tool for a spherical roller. The machine tool comprises a bed body, an electric control cabinet and a cooling mechanism, as well as a loading / unloading mechanism, a workpiece transmission mechanism, a swinging mechanism and a superfinishing mechanism, wherein the bed body is provided with an upright; a box body is mounted on the upright; the workpiece transmission mechanism is mounted on the front portion of the bed body; an upright and a box body are mounted on the rear portion of the workpiece transmission mechanism; the swinging mechanism comprises a swinging main shaft and an oil stone plunge cylinder; the swinging main shaft is mounted on the front end of the swinging main shaft; the oil stone plunge cylinder is mounted on the rear portion of the swinging main shaft; the loading / unloading mechanism comprises a loading path and an unloading path; the loading path is mounted on the upper portion of the box body, while the unloading path is mounted on the lower portion of the workpiece transmission mechanism; all the mechanisms are arranged in a totally enclosed housing; and the electric control cabinet is arranged on the right side of the housing. The machine tool has the advantages of low roughness degree value, low roundness, long service life and low noise, etc.

Disclosed herein is a new improved large planetary gear system used on the input stage of wind turbine power generators. This improved planetary gear system reduces or eliminates lubricant debris traditionally generated from the gear teeth, thereby eliminating an initiating source for bearing failure. To achieve these results, some and preferably all of the gear teeth within the planetary gear system are superfinished using chemically accelerated vibratory finishing to a surface roughness of approximately 0.25 micron or less. Several objects and advantages of the invention are to provide a gearbox with reduced metal debris, improved bearing life, reduced wear, reduced vibro-frictional noise, improved contact fatigue, improved fretting resistance, improved lubrication, to simplify the run-in process, and to enhance the durability and efficiency of the gearbox.