摘要:
A chain cutter comprises an endless chain body including a plurality of plate-like flaps connected to each other to provide angular movement in a common plane; each of the flaps has an end face on a inner peripheral side of said chain body, and at least a part of said flaps has a cutting device at the end face.
摘要:
A boring bar tool for use with a tip is disclosed which has a tool body. The tip is mounted to one side of a forward end of the nose of the tool body. A neck is formed at a proximal end of the nose, and a shank in the form of a shaft is formed at a proximnal end of the neck. The neck has a cross-sectional area in a plane perpendicular to an axis of the shank which is larger than the cross-sectional area of the shank in the plane.
摘要:
A ceramic substrate is used for an electric or electronic circuit comprises a ceramic plate formed of a substance mainly composed of aluminum nitride, and conductive islands formed of aluminum or an aluminum alloy and bonded to one surface of the ceramic plate for providing conductive paths to circuit components connected thereto, wherein the aluminum islands decrease the total weight of the ceramic substrate and enhance a resistance against repetition of a thermal stress.
摘要:
In a single-crystal growth method disclosed herein, a melt is first prepared in a container having a cylindrical wall. The container is such that at least the inner peripheral surface of the cylindrical wall is formed of a material which is not wettable to the melt. A seed is then immersed in the melt and a single crystal rod formed on the seed is pulled in such a manner as to be coaxial with the cylindrical wall. The distance between the single crystal rod and the inner peripheral surface is set to a prescribed value G, so that the melt adjacent to the inner peripheral surface is formed into a prescribed meniscus shape. The temperature distribution at the melt surface is controlled to maintain the meniscus shape between the single crystal rod and the inner peripheral surface at an equilibrium state to thereby control the diameter of the single crystal rod.
摘要:
Method and apparatus for manufacturing an oxygen-free copper having an oxygen content of no greater than 3 ppm by weight are disclosed. In the method, a deoxidizing step is carried out by bringing a reducing gas containing hydrogen gas into contact with a molten copper to react to the oxygen to remove the same. Then a dehydrogenation step may be carried out by bringing a gas of lean hydrogen concentration into contact with the molten copper. Accordingly, the apparatus has a deoxidizing device for blowing the reducing gas into the molten copper and preferably a dehydrogenation device.
摘要:
A zirconium alloy for use in spacer grids for nuclear reactor fuel claddings, which consists essentially of, on a weight percent basis,2.5 to 10% Nb,0.01 to 1.5% of one or more components selected from the group consisting of Y and rare earth elements and oxides thereof,0.05 to 1% of one or more optional element selected from the group consisting of Fe, Cr, Mo and V, andthe remainder Zr and incidental impurities.
摘要:
There is disclosed a rotary cutting tool having a cutter body and at least one pair of end and peripheral cutting edges provided on the cutter body. A covering of a generally cylindrical shape is disposed rotatably relative to the cutter body so as to surround the circumferential surface of a forward end portion of the cutter body to define a chip disposal space therebetween. A guide member is secured to the forward end portion of the cutter body for guiding chips produced during a cutting operation to the chip disposal space. Furthermore, a chip disposal pipe is connected to the covering for removing the chips in the chip disposal space.
摘要:
A microdrill bit is made of a tungsten carbide based cemented carbide which contains a binder phase of 6% by weight to 14% by weight of a cobalt alloy and a hard dispersed phase of balance tungsten carbide. The cobalt alloy contains cobalt, chromium, vanadium and tungsten and has weight ratios so as to satisfy the relationships of 0.04.ltoreq.(c+d)/(a+b+c+d).ltoreq.0.10 and 0.50.ltoreq.c/(c+d).ltoreq.0.95, where a, b, c and d denote weight ratios of tungsten, cobalt, chromium and vanadium, respectively. The drill bit is formed so as to have a Rockwell A scale hardness of 92.0 to 94.0.
摘要翻译:微钻头由碳化钨基硬质合金制成,其包含6重量%至14重量%的钴合金和硬分散相的平衡碳化钨的粘结相。 钴合金含有钴,铬,钒和钨,其重量比为满足0.04 =(c + d)/(a + b + c + d)≤0.10和0.50 < c /(c + d) = 0.95,其中a,b,c和d分别表示钨,钴,铬和钒的重量比。 该钻头形成为具有92.0至94.0的洛氏A刻度硬度。
摘要:
The present invention concerns to a clamped cutting tool used in the metalworking field. The clamped cutting tool includes a tool-holder, a shim member placed on the tool-holder, a cutting insert placed on the shim member, and a locking pin held in engagement with the tool-holder for clamping the cutting insert. The tool-holder includes a forward end portion having an insert receving recess formed therein, the recess having a bottom wall and at least one side wall extending upwardly from the bottom wall, the bottom wall including a pin-receiving hole of a circular cross-section formed therein so as to extend downwardly. The shim member has a bore of a circular cross-section formed therethrough, the shim member being disposed on the bottom wall of the recess in such a manner that the bore communicates with and is concentric to the hole of the tool-holder. The cutting insert has an aperture of a circular cross-section formed therethrough, the insert being disposed on the shim member in such a manner that the aperture communicates with the bore of the shim member.
摘要:
A hydrogen absorbing Ni-based alloy comprising 5 to 25% by weight of titanium (Ti), 10 to 37% by weight of zirconium (Zr), 4 to 20% by weight of manganese (Mn), 0.1 to 12% by weight of vanadium (V), 0.01 to 5% by weight of iron (Fe), 0.01 to 4.5% by weight of aluminum (Al), and balance nickel (Ni) and unavoidable impurities, and a sealed Ni-hydrogen rechargeable battery comprising a negative electrode provided with such a hydrogen absorbing alloy as an active material, an Ni positive electrode, a separator and an alkaline electrolyte solution.