Fuji Jukogyo Kabushiki Kaisha

Jiro Maruyama

Yasutaka Yamamoto

Hitoshi Ohmori

Weimin Lin

Motoyuki Fujiwara

Nobuyuki Mabuchi

Masaoki Shimano

Koji Etoh

An ELID honing device includes a honing toolpositioned above a workpiecehaving a hollow cylindrical inner surface, and vertically movable and rotationally drivable about a vertical rotation axis while being rockably suspended from an upper end, and a honing guidepositioned in proximity to an upper portion of the workpiece to guide the honing tool to the hollow cylindrical inner surface. The honing toolhas a fixed guidehaving a predetermined radius R from the rotation axis to its outer peripheral surface, and honing stonesandhaving outer peripheral surfaces movable in parallel from a diameter-increased position outside the radius R to a diameter-reduced position inside the radius R and capable of being electrolytically dressed. Further, the honing guidehas a hollow cylindrical ELID electrodehaving an inner surfacefor guiding an outer peripheral surface of the fixed guide of the honing tool and capable of being subjected to a negative voltage.

Device and method for ELID honing

A process for grinding workpieces is obtained which includes attaching honing stones to a tool, each of the honing stones including grinding particles and an electroconductive connection for fixing the grinding particles to each other; grinding the workpieces with the honing stones by applying a honing liquid having substantially no electroconductive property to a region between the workpiece and the honing stones, the workpieces being successively ground during a series of processing periods, while interposing non-processing periods between the processing periods, each of the workpieces being ground in one of the processing periods; and performing an electrolytic dressing with respect to the honing stones by using an electrode provided to face the honing stones with a space therebetween, a voltage being applied between the honing stones and an electrode in the presence of an electroconductive liquid in the space between the honing stones and the electrode, the electrolytic dressing being carried out during the non-processing periods.

Process and apparatus for grinding with electrolytic dressing

The present invention provides a process and an apparatus for the preparation of a motor coil by which a longitudinally wound motor coil, so called, can be easily prepared. First, a molded productcomprising a column part, and a fin partprojected in the form of flat plate from an outer peripheral surfaceA,B,C,D of the column part to an outer side in a radial direction of the column part and helically continuing in an axis direction of the column part at predetermined intervals along the outer peripheral surface of column part is prepared. The column partof the first molded product is punched out in an axis direction of the column part with retaining the fin partto remove the column part, and the fin parthaving helical shape left after the removal is coated with an insulating film. Then both sides of the fin partin a direction F punching out the column partare pressurized to deform the fin partsuch that flat plate portions of the fin partare superposed on one another.

Method and apparatus for manufacturing motor coil

The present invention is to provide a process for the preparation of coil for an electric appliance by which a coil for electric appliances comprising an edgewise wound square coil having small intervals between coils and high quality can be easily prepared in good productivity and low-cost. The coil for electric appliance comprising edgewise wound square coilis prepared by processing mechanically an electrically conductive flat plate to form plural strip-shaped coil fragmentsA toE, butting ends of the coil fragmentsA toE each other and welding the ends by beam to form plural one-turn square coils, each of the one-turn square coils having a ring-shape provided with a beginning endA and a terminal endB divided by a notchwhose location is different from one another in the one-turn square coils, and superposing the one-turn square coils on one another with shifting the locations of the notcheslittle by little in order so that the terminal and beginning ends of the one-turn square coils adjacent to each other are contact with each other to weld the terminal and beginning ends in the notch, whereby the one-turn square coils are spirally combined.

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Tokyo, Japan

Jiro Maruyama