Sumitomo Electric Industries, Ltd. is a manufacturer of electric wire and optical fiber cables. Its headquarters are in Chūō-ku, Osaka, Japan. The company's shares are listed in the first section of the Tokyo, Nagoya Stock Exchanges, and the Fukuoka Stock Exchange. In the period ending March 2013, the company reported consolidated sales of $23 billion .The company was founded in 1897 to produce copper wire for electrical uses. Sumitomo operates in five business fields: Automotive, Information & Communications, Electronics, Environment & Energy, and Industrial materials and is developing in two others: Life Sciences and Materials & Resources. It has more than 350 subsidiaries and over 200,000 employees in more than 30 countries.Sumitomo Electric has traditionally had an intensive focus on R&D to develop new products. Its technologies have been used in major projects including traffic control in Thailand, improvement of telecom networks in Nigeria, membrane technology for waste water treatment in Korea, and bridge construction in Germany.Sumitomo Electric's electrical wiring harness systems, which are used to send information and energy to automobiles, hold the second largest market share in the world. Sumitomo Electric also continues to be the leading manufacturer of composite semiconductors , which are widely used in semiconductor lasers, LEDs, and mobile telecommunications devices. The company is one of the top three manufacturers in the world of optical fiber. Wikipedia.
Sumitomo Electric | Date: 2017-05-17
A cutting insert comprising a cutting edge (4) formed by an intersection ridge between a rake face (5) and a side face (6), the cutting edge including a major cutting edge (4a), a flat cutting edge (4c), and a chamfer edge (4b) disposed between the major cutting edge and the flat cutting edge, wherein in a direct view of a side face near the flat cutting edge, a ratio of installation area length L2 of the chamfer edge to installation area length L3 of the major cutting edge is L2 : L3 = 2 : 8 to 5 : 5, and inclination angle _(1) of the chamfer edge (4b) with respect to the flat cutting edge (4c) and inclination angle _(2) of the major cutting edge (4a) with respect to the flat cutting edge (4c) are set to have a relationship of _(1) < _(2).
Sumitomo Electric | Date: 2017-03-01
A compound sintered body contains cubic boron nitride particles and binder particles. The composite sintered body contains 40 vol% or more and 80 vol% or less of the cubic boron nitride particles. The binder particles contain TiCN particles. The composite sintered body shows a first peak belonging to a (200) plane of the TiCN particles in a range in which a Bragg angle 2 is 41.7 or more and 42.6 or less in an X-ray diffraction spectrum measured using a Cu-K ray as a ray source. Assuming that a vertical axis y in the X-ray diffraction spectrum indicates diffraction intensity, and that a maximum value of a peak height of the first peak is defined as I_(max), a difference between a maximum value and a minimum value of Bragg angles 2 is 42.6 or less, the Bragg angles 2 being measured at two or more intersection points of a straight line y = I_(max)/2 and the first peak.
Sumitomo Electric | Date: 2017-04-05
A cutting insert includes a first surface and a second surface each of which is polygonal and that face away from each other; a side surface that is continuous with the first surface and a side surface that is continuous with the second surface; a cutting edge formed along each of a ridge where the first surface and the side surface intersect and a ridge where the second surface and the side surface intersect; a bearing surface formed in each of a part the first surface and a part of the second surface adjacent to an insert center, the bearing surfaces disposed parallel to each other; and a recessed portion that separates the side surface that is continuous with the first surface from the side surface that is continuous with the second surface. The cutting edge includes three corner edges, a first cutting edge, and a second cutting edge, the first and second cutting edges being continuous with each other and located between each pair of the corner edges. A length of the first cutting edge is greater than that of the second cutting edge, an end portion of the first cutting edge adjacent to one of the corner edges is at a position higher than the bearing surface, and an end portion of the first cutting edge opposite to the end portion adjacent to the corner edge is at a position lower than the bearing surface. Each of the first surface, the second surface, and a cross section of the recessed portion has such a shape that outlines of the shape before and after rotation of the insert by 120 around the insert center are coincident with each other. The first surface and the second surface have the same shape, and the second cutting edge of the second surface is located at a corner at which the first cutting edge of the first surface is located.
Murata Manufacturing Co. and Sumitomo Electric | Date: 2017-01-04
[Problem] To accurately set the orientation of a linear cutting blade when mounting a cutting tool and to reduce the production cost of a holder, the cutting tool, and the like. [Solving Means] A machine tool includes a moving device (M1 to M3) that moves a rectangular plate-shaped cutting tool T1 provided with a linear cutting blade Th in a Y-direction of a Z-direction, the Y-direction, and a Z-direction, or in a combined direction of the Y-direction and the Z-direction, the Z-direction being parallel with the axis of a main spindle 7 for holding a workpiece W, the X-direction being perpendicular to the Z-direction and determining the amount of cutting of the workpiece W, the Y-direction being perpendicular to the Z-direction and the X-direction, and a holder 25 that holds the cutting tool T1 in a state in which the orientation of the linear cutting blade Th is inclined with respect to the Z-direction when seen from the X-direction. The holder 25 has a first reference surface 26a that is in contact with a first surface Ta parallel with a linear cutting blade Th, of the side surfaces of the cutting tool T1 and is parallel with the YZ-plane or a plane tangent to the peripheral surface of the workpiece W and a second reference surface 26b that is in contact with a second surface Tb intersecting the first surface Ta. The workpiece W is cut while moving the linear cutting blade Th in the Y-direction or the combined direction.
Sumitomo Electric | Date: 2017-03-29
An object of the present invention is to provide a printed wiring board in which conductive layers formed on two surfaces of a base layer that contains a fluororesin as a main component are reliably connected to each other through a via-hole. A printed wiring board according to an embodiment of the present invention includes a base layer containing a fluororesin as a main component, a first conductive layer stacked on one surface of the base layer, a second conductive layer stacked on the other surface of the base layer, and a via-hole that is formed along a connection hole penetrating the base layer and at least one of the first conductive layer and the second conductive layer in a thickness direction and that electrically connects the first conductive layer and the second conductive layer to each other. At least a part of an inner circumferential surface of the base layer in the connection hole has a pre-treated surface having a content ratio of oxygen atoms or nitrogen atoms of 0.2 atomic percent or more.
Sumitomo Electric Industries and Sumitomo Electric | Date: 2017-03-08
Provided is a polarization state converting element including a plurality of waveplates, and a rotation mechanism that rotates the respective waveplates independently of one another around an optical axis. The waveplates are each configured by a substrate made of a material having no optical rotatory property but having birefringence, or are each made of a material having neither optical rotatory property nor birefringence, but having transparency, a function of phase delay depending on polarization being applied on a surface of each waveplate.
Sumitomo Electric Industries and Sumitomo Electric | Date: 2017-02-08
An object of the present invention is to provide a multilayered heat-recoverable article in which an adhesive layer easily flows during heat shrinkage to ensure adhesiveness with an adherend and does not flow out from a base material layer after heat shrinkage, and a wire splice and a wire harness that include a tube formed by thermally shrinking such a multilayered heat-recoverable article. The multilayered heat-recoverable article (1) according to the present invention includes a cylindrical base material layer (10), and an adhesive layer (11) formed on an inner circumferential surface of the base material layer. The adhesive layer (11) is formed of a resin composition that contains a polyamide as a main component and that does not substantially contain an inorganic filler. The resin composition is cross-linked by irradiation with ionizing radiation. A shear viscosity of the adhesive layer (11) at 150C is 300 Pas or more at a shear rate of 0.01 s^(-1) and 200 Pas or less at a shear rate of 100 s^(-1). The wire splice and the wire harness according to the present invention includes a tube formed by thermally shrinking the multilayered heat-recoverable article (11).
Sumitomo Electric and Sumitomo Electric Industries | Date: 2017-04-19
A sintered compact has a first material, a second material, and a third material The first material is cubic boron nitride. The second material is a compound including zirconium. The third material is an aluminum oxide and the aluminum oxide includes a fine-particle aluminum oxide. The sintered compact has a first region in which not less than 5 volume % and not more than 50 volume % of the fine-particle aluminum oxide is dispersed in the second material. On arbitrary straight lines in the first region, an average value of continuous distances occupied by the fine-particle aluminum oxide is not more than 0.08 m and a standard deviation of the continuous distances occupied by the fine-particle aluminum oxide is not more than 0.1 m.
Sumitomo Electric | Date: 2017-04-12
A surface-coated tool (100) includes a substrate (101) and a coating film (110) formed on the substrate (101). The coating film (110) includes an alternate layer (112) in which one or more A layers (112a) and one or more B layers (112b) are alternately stacked. The A layer (112a) and the B layer (112b) each have a thickness not smaller than 2 nm and not greater than 100 nm. An average composition of the A layer (112a) is expressed as Ti_(a)Al_(b)Si_(c)N (0.5
Sumitomo Electric and Sumitomo Electric Industries | Date: 2017-04-12
A sintered compact according to the present invention includes: a first material that is cubic boron nitride; a second material that is an oxide of zirconium; and a third material that is an oxide of aluminum, the second material including cubic ZrO_(2) and ZrO, the third material including -Al_(2)O_(3), and the sintered compact satisfying the following relation: _(a1)(110), I_(zro2)(111), and I_(zro)(111) respectively represent X-ray diffraction intensities of a (110) plane of the -Al_(2)O_(3), a (111) plane of the cubic ZrO_(2), and a (111) plane of the ZrO.