摘要:
A hollow shaft material is provided with, on an outer peripheral surface side thereof, for example, a movable induction heating coil wrapped therearound. While a high-frequency current with a predetermined frequency is caused to flow through the induction heating coil, the induction heating coil is axially moved to perform induction hardening of the hollow shaft material from the outer peripheral surface side. At this moment, the frequency of the high-frequency current caused to flow through the induction heating coil is set relatively low as to the small-diameter portions, which have a relatively small thickness, and the frequency of the high-frequency current caused to flow through the induction heating coil is set relatively high as to the large-diameter portion, which has a relatively small thickness.
摘要:
Provided is a method of manufacturing a hollow power transmission shaft, which makes it possible to ensure stable quality even when there is a difference in wall thickness or hardening ratio along an axial direction thereof. A hollow shaft material (1′) is provided with, on an outer peripheral surface (1g) side thereof, for example, a movable induction heating coil (5) wrapped therearound. While a high-frequency current with a predetermined frequency is caused to flow through the induction heating coil (5), the induction heating coil (5) is axially moved to perform induction hardening of the hollow shaft material (1′) from the outer peripheral surface (1g) side. At this moment, the frequency of the high-frequency current caused to flow through the induction heating coil (5) is set relatively low as to the small-diameter portions (1b), which have a relatively small thickness, and the frequency of the high-frequency current caused to flow through the induction heating coil (5) is set relatively high as to the large-diameter portion (1a), which has a relatively small thickness.
摘要:
A manufacturing apparatus for manufacturing electronic monolithic ceramic components, including a sheet supplier for supplying a plurality of ceramic green sheets of a plurality of types in a predetermined order, and a laminator for laminating the ceramic green sheets supplied by the sheet supplier. A plurality of trays is set in two vertical columns in a rack which is vertically movable. Each tray holds a stack of a plurality of ceramic green sheets of the same type. A particular tray positioned to a predetermined level by the vertical movement of the rack is drawn by a tray drawer device, and one ceramic green sheet is picked up from the tray, and is then conveyed to the laminator. The utilization efficiency of area in the sheet supplier is thus increased.
摘要:
A homokinetic joint which can be manufactured at low cost. Its outer ring and inner ring has a spherical inner surface and a spherical outer surface both formed with a plurality of track grooves in which are received torque transfer balls retained by a cage. The spherical inner surface and the track grooves of the outer ring are finished by plastic working, so that no additional finishing work is necessary. Thus, the outer ring can be manufactured at low cost.
摘要:
An electrode application tool is disclosed for applying of electrode paste to end surfaces of electronic components or collective bodies of electronic components simultaneously at one time. the electrode application tool is designed to have many longitudinal grooves formed in the opposite lateral side surfaces of a main body frame of the application tool so as to accommodate end portions of electronic components or collective bodies of electronic components, and two pairs of upper and lower plate-like elastic members provided so as to cover the upper part and the lower part of the longitudinal grooves, respectively, at least one of each pair allows the longitudinal grooves to be opened, thereby improving productivity of electronic components.
摘要:
A lampshade made in accordance with this invention is characterized in that it consists solely of a plurality of comparatively thin sheets of a same shape corresponding to a front vertical cross-sectional view of the lampshade or a vertically cut out half of said view. Each sheets has strips which are aligned in parallel with each other, and each strip has a base portion located adjacently to an outer contour of the sheet and a free end located oppositely to the base portion. When the plurality of sheets bound together at least at upper ends thereof are framed to the lampshade, they extend radially outwardly with a desired angular distance therebetween and strips thereof bridge over the outer contours of the sheets.
摘要:
A boundary layer type semiconducting ceramic capacitor with high capacitance is disclosed. The capacitor comprises a semiconducting ceramic body in which grain boundaries on crystal grains of the semiconducting ceramic body are insulated, characterized in that said semiconducting ceramic body has a composition consisting essentially of 98.1 to 99.88 mole % of a main component (Sr.sub.1-x Ba.sub.x)Tio.sub.3 or (Sr.sub.1-x Ba.sub.x)TiO.sub.3 modified with a titanete and/or a zirconate, wherein x is a mole fraction of Ba and takes a value ranging from 0.30 to 0.50, and 0.1 to 1.0 mole % of at least one semiconductorizing agent selected from the group consisting of rare earth elements, Nb, Ta and W, and that said grain boundaries of the crystal grains are insulated by at least one insulating agent selected from the group consisting of Mn, Bi, Cu, Pb, B and Si, and that the maximum crystal grain present in the semiconducting ceramic body has a grain size ranging from 100 to 250.mu.. The composition contains 0.02 to 0.2 mole % of Mn as a mineralizing agent or insulating agent. The composition may further contain at least one of 0.05 to 0.5 mole % of SiO.sub.2 and 0.02 to 0.2 mole % of Al.sub.2 O.sub.3.
摘要:
A method for producing boundary layer semiconductor ceramic capacitors comprises firing shaped bodies of a semiconductor ceramic material in a neutral or reducing atmosphere, heat-treating the resultant semiconductor ceramic bodies to insulatorize crystal grain boundaries of the semiconductor ceramics, and providing opposite electrodes on surfaces of the heat-treated semiconductor ceramic bodies and is characterized in that said heat-treating is carried out by heating the semiconductor ceramic bodies together with power of an insulatorizing agent with stirring in a neutral or oxidizing atmosphere at a temperature ranging from 950.degree. to 1300.degree. C. As a semiconductor ceramic material, there may be used semiconductor ceramics of a barium titanate system, or of a strontium titanate system, or a complex semiconductor ceramic mainly comprising barium titanate or calcium titanate and strontium titanate. This method enables one to produce boundary layer semiconductor ceramics as good quality with small standard deviation and high yield.
摘要:
One or more ketoses such as fructose are separated from a solution of sugar mixture containing the ketoses and one or more aldoses by contacting the solution of sugar mixture with an insoluble high polymer having primary amine moieties to remove the aldoses from the liquid phase by bonding the aldoses to the high polymer.
摘要:
A manufacturing apparatus for manufacturing electronic monolithic ceramic components, including a sheet supplier for supplying a plurality of ceramic green sheets of a plurality of types in a predetermined order, and a laminator for laminating the ceramic green sheets supplied by the sheet supplier. A plurality of trays is set in two vertical columns in a rack which is vertically movable. Each tray holds a stack of a plurality of ceramic green sheets of the same type. A particular tray positioned to a predetermined level by the vertical movement of the rack is drawn by a tray drawer device, and one ceramic green sheet is picked up from the tray, and is then conveyed to the laminator. The utilization efficiency of area in the sheet supplier is thus increased.