Abstract: A grinding wheel having a circumferential rim and a plurality of electrically conductive zones and non-grinding zones therebetween the rim. A method of using such a grindstone as disclosed. Further, certain alternative methods of making such a grindstone are disclosed.

Abstract: Disclosed is a method of producing a grinding wheel by electroplating. A part of the outer peripheral portion of a grinding wheel body is immersed in a plating solution. While rotating the grinding wheel body at a low speed, electric current is supplied to flow between an anode disposed in the plating solution and a cathode contacting the grinding wheel body, so that a pre-plating layer of uniform thickness is formed on the outer peripheral surface of the grinding wheel body. Plating operation is continued while adhering abrasive grains to the pre-plating layer to further cause a precipitation of a plating layer to temporarily fix the abrasive grains. The abrasive grains are then pressed by a pressing roller so as to be forcibly embedded into the pre-plating layer by making an effective use of plastic deformation of the pre-plating layer, thereby to obtain a uniform projection height of the abrasive grains from the surface of the grinding wheel.

Abstract: The invention relates to a method and an apparatus for the treatment of surfaces of a workpiece of carbon-containing cast iron, and in particular of blind holes in gray iron cast workpieces, by electrochemical stock removal and mechanical reaming-and-plating. Electrochemical stock removal and mechanical reaming and plating are carried out in separate steps whose operating parameters are independently adjustable, the mechanical stock removal being essentially confined to a reaming-and-plating of the surface which does not entail a closing of graphite flakes. A cylinder bore produced by the method of the invention with desired roughness will have a dark, lustrous surface.

Abstract: An apparatus is provided which machines a generally cylindrical shaft in such a way so as to improve its roundness. A bracket is shaped to be slidably associated with the shaft in a two point contact. The bracket has a measuring means attached to it which measures the distance between a portion of the shaft's surface and a chordal line drawn between the two points of contact between the bracket and the shaft. Also provided is a means for electrochemically removing material from the surface of the shaft in response to a signal received from the measuring means which is amplified prior to being transmitted to a cathode portion of the electrochemical machining apparatus. Variations of the roundness machining apparatus incorporate placements of the cathode at various arcuate distances from the measuring means.

Abstract: The electrolytic/electric discharge machining of a workpiece of a non-conductive hard material, for example, ceramic material is carried out by preparing a grinding wheel having conductive regions and non-conductive abrasive regions circumferentially alternately arranged on the circumferential edge of the wheel, and bringing the rotating grinding wheel in contact with the workpiece while applying AC or DC voltage across the grinding wheel and the non-conductive workpiece.

Abstract: An improved electrochemical grinding wheel electrode consisting essentially of electrically conductive abrasive grains bonded together with an essentially nonconductive bonding matrix. The abrasive grains are admixed with an amount of 10 to 30% by volume of the bonding matrix and sintered together to form the porous, homogeneous electrode body, e.g. in the form of a wheel, having a specific resistivity not greater than 100 ohm-cm, preferably between 0.1 and 10 ohm-cm.

Abstract: A method and system for continuously grinding tubing to finished cannulae, where the tubing is loaded in a carrier and the carrier is continuously guided past stations which cut the primary bevel, finish the butt end, clean the cut ends, and then make lancelet cuts on the primary bevel. The system further includes a cannula carrier and guide system which permits the cannulae to be unclamped, rotated and reclamped prior to each lancelet cutting station.

Abstract: In a method of mirror-finishing a cylindrical workpiece, according to which, with an abrasive matter and an electrolyte disposed at and supplied to each of the gaps between a cylindrical workpiece connected to the anode of a power supply and working electrodes connected to the cathode of the power supply and disposed oppositely to the outer surface or the inner surface of said cylindrical workpiece, an anodic liquation operation by electrolysis performed onto metal in the surface to be treated of the cylindrical workpiece is assisted with an abrasive operation by which anodic passive films generated on the surface to be treated are mechanically abrased by the abrasive matters, whereby the projected portions of the surface to be treated are electrolytically liquated and abrased preferentially, said method is characterized in that an electrolyte in a passive state is used, an electrolytic voltage to be used is in the range from a few V to about 15 V, the density of an electrolytic current to be used is about 10

Abstract: Prior art electrolysis cells used for producing chlorine for sanitizing and sterilization purposes deteriorate due to accumulation of scale on the electrodes thereof. This problem is solved by an improved cell comprising an outer electrode having an in-facing surface which falls generally on a first cylindrical surface and an inner generally coaxial electrode having an out-facing surface which falls generally on a second cylindrical surface, the second cylindrical surface falling inward radially of the first cylindrical surface, the outer and inner electrodes being longitudinally coextensive for at least a substantial portion thereof. The inner and outer electrodes are rotated relative to one another. An abrading structure is mounted to one of the electrodes with an abrasive portion thereof in abrasive contact with the other of the electrodes. The abrading structure is electrically insulated from at least one of the electrodes.

Abstract: This specification discloses a method and apparatus for plating a surface wherein a conductive anode body is spaced from a cathodic work surface by non-conductive particles carried in the anode body. The non-conductive particles closely space the anode from the cathodic surface, activate the cathodic surface to increase the plating rate, and may be utilized to carry out a honing or burnishing operation on the work surface.