57results about How to "Suppression defect" patented technology

The invention provides a cubic boron nitride sintering body cutting tool that exhibits excellent defect resistance, and a manufacturing method of the same. The cutting tool is a cBN tool that still exhibits excellent defect resistance and breaking resistance even if continuously cutting and machining high-hardness steel, and that has an excellent cutting property even if being used for a long time. A sintering body comprising cubic boron nitride particles and a bonding phase serves as a tool base body of the cubic boron nitride sintering body cutting tool. Nitride, boride and oxide containing Ti and a solid solution of the nitride, boride and oxide, in an area within 50nm from the surfaces of the cubic boron nitride particles, account for more than 80vol% of the total volume of the area. In this way, the aim of the invention is achieved.

The invention provides a surface coating cutting tool. An average proportion X[avg] of A1 and an average proportion Y[avg] of C of a (Ti[1-X]A1[X])(C[Y]N[1-Y]) layer, of which film formation is realized through chemical evaporation with A1(CH3) as reaction gases on the surface of a substrate, wherein (Xavg and Yavg are both atomic ratios), satisfy 0.60<= X[avg]<=0.95 and 0<= Y[avg]<=0.005. Crystalline grains having cubic crystalline structures exist in crystalline grains forming complex nitrides or a layer of the complex nitrides. In measurement of distribution of degrees of inclination angles of an inclination angle between a normal of surfaces of crystalline grains (111) and the surface of the substrate, a degree ratio in a scope of 0-12 degrees is more than 45% of all the degrees. When a scanning electron microscope is used to observe organizations from the surface sides of the complex nitrides or the layer of the complex nitrides, the crystalline grains having the c cubic crystalline structures have triangular shapes in surfaces perpendicular to a layer thickness direction. A facet formed by an equivalent crystalline plane expressed by (111) of the crystalline grains accounts for an area proportion of more than 35% in the surface perpendicular to the layer thickness direction.

In a cBN sintered body cutting tool having a sintered body including cBN grains and a binder phase as the tool base body therefor, the sintered body contains at least 40 capacity% but less than 60 capacity% cBN grains, a minimum of 2% by mass of Al, and a maximum within a range that fulfils the relationship Y= -0.1X+10, when Y is the Al content ratio (capacity %) and X is the cBN content ratio (% by mass). The binder phase contains at least a Ti-based compound, Al2O3, and unavoidable impurities. Al2O3 that has a diameter of 10-100 nm, among said Al2O3, is dispersed and generated within the binder phase and at least 30 Al2O3 being generated within a 1 [mu]m * 1[mu]m cross-sectional area of the binder phase.

An object of the present invention is to provide a cBN sintered body cutting tool with excellent toughness. While being used for interrupted cutting of high-hardness steel even if in the situation requiring high-load cutting conditions, the cutting tool provided by the invention is prevented from proneness to the cracks and defects of the blade and has excellent cutting performance which can be maintained for a long term. The cBN sintered body cutting tool comprises a sintered body including cubic boron nitride and a binder phase as a tool substrate, wherein a binder phase structure is existed in the area within 100nm from the grain boundary of the cubic boron nitride towards the binder phase, and is composed of one or more than two selected from the group of nitrides, carbides, carbon nitrides and borides of Ti, nitrides, borides and oxides of Al, and solid solution of more than two of them, and inevitable impurities, and has fine structures with an average volume diameter MV of 10-80 nm. Thus, the object of the present invention is achieved.

The invention provides a cutting tool made from a cubic boron nitride sintering material which demonstrates excellent resistance to defects in intermittent cutting machining of high-hardness steel. According to the cutting tool made from the cubic boron nitride sintering material, optimally an average particle size of a cubic boron nitride particle is 0.5 to 8 [mu]m; at least pat of the surface of the cubic boron nitride particle is coated by an oxygen-containing aluminum nitride film with the average thickness of 10 to 100 [mu]m and an everage oxygen concentration being 1 to 15 atom%; furthermore, the oxygen-containing aluminum nitride film covering the surface of the cubic boron nitride particle has a local crack; and the average formation proportion of the local crack h/H satisfies 002<=h/H<=0.08, with h representing the length of the crack of the oxygen-containing aluminum nitride film and H representing the perimeter of the cubic boron nitride particle.

The present invention is a pneumatic tire vulcanized and molded by a split type tire mold composed of a plurality of sectors formed by dividing an annular side mold having a tread forming surface for forming a tread in the circumferential direction. . On the tread having the first region formed by the region near the sector division position of the sideform and the second region formed by the region far from the sector division position of the sideform, there is at least one tire extending in the circumferential direction of the tire. The land portion formed by dividing the circumferential grooves. In at least one of the land portions, fine lines extending from at least one of the circumferential grooves and extending from at least one of the land portions are arranged at predetermined intervals in the tire circumferential direction. The fine lines include first fine lines located in the first region and second fine lines located in the second region. The length W1 in the tire width direction of the first sipe is shorter than the length W2 in the tire width direction of the second sipe.

A disk-like glass substrate with magnetic recording medium and a manufacturing method thereof aim to improve productivity. The disk-like glass substrate does not contact with a wall surface of a cutting slot when being cut out from a glass blank. The method comprises a cutting step, a polishing step, and a cleaning step. In the cutting step, the substrate is cut out of the glass blank along a circular contour in the surface by means of a pulse laser beam with an irradiation pulse width greater than 1 femtosecond and less than 1 nanosecond, so that the cutting slot wider than 10 micrometer is formed along the contour. In the polishing step, a main surface of the substrate is polished. In the cleaning step, the surface of the substrate is cleaned.

A photosensitive resin composition includes a carboxyl group-containing photosensitive resin, a photopolymerization initiator, a compound having an ethylenic unsaturated group, a non-reactive diluent, and an epoxy compound. The photopolymerization initiator includes an oxime ester compound and an aminocarbonyl compound having a tertiary amino group.

A method for operating a charging system for charging electric vehicles, wherein the charging system has a charging station and at least two charging columns which are physically separate from one another and each have at least one charging connection. Each charging column has a light sensor and also a light and/or a display. The method includes receiving signals of the individual light sensors and also collectively evaluating the signals and adjusting the brightness of the light and/or the display of at least one of the charging columns depending on a result of collectively evaluating the received signals. Also described herein is a corresponding charging system.

A cutting insert having a substantially polygonal upper surface, a lower surface, a side face with a flank, and a cutting edge formed at the intersection of the upper surface and the side face.The cutting edge has a first cutting edge, a second cutting edge, and a third cutting edge located between the first and second cutting edge at the corner of the polygon. The flank has a first flank corresponding to the first cutting edge, and a second flank corresponding to the second cutting edge. The first flank has an upper flank connected with the first cutting edge, a middle flank located on the lower surface side of the upper flank, and a lower flank located on the lower surface side of the middle flank.Assuming the clearance angle of the upper flank is alpha, the clearance angle of the middleflank is belta, the clearance angle of the lower flank is gamma, and the clearance angle of the second flank is epsilon, the alpha, belta, gamma and epsilon satisfy the relation alpha<belta<gamma<epsilon. The cutting insert is attached to a cutting tool, and a cutting method employs the cutting tool.