Abstract: Provided is a machining jig on which a carbon film (3) is formed on a machining surface of a rigid substrate (1), in which the carbon film (3) indicates a Raman spectroscopy spectrum with an intensity ratio, represented by the formula: ID/IG (where ID is the maximum peak intensity at 1333±10 cm?1 in the Raman spectroscopy spectrum of the carbon film surface, and IG is the maximum peak intensity at 1500±100 cm?1 in the Raman spectroscopy spectrum of the carbon film surface), exceeding 0.6. Also provided is a method of manufacturing seamless can bodies, the method including a step of using a mold machining member, on which a diamond film is formed on a machining surface, to press work a metal material onto the machining surface of the mold machining member in a state where a coolant is interposed.

Abstract: A metallic worked article suppressing the worked surfaces from being scratched during the plastic work that is conducted aiming at reducing the thickness or decreasing the diameter. The metallic worked article has a reduced thickness or a decreased diameter as obtained through the plastic work, wherein on the worked surface thereof, the ratio Ra1/Ra2 of an arithmetic mean roughness Ra1 measured in a direction at right angles with the direction of working and an arithmetic mean roughness Ra2 measured in the direction of working, is from 0.5 to 1.5.

Abstract: Provided is a manufacturing method of a bottomed cylindrical body, which can achieve both severe can making processing such as conventional drawing and ironing, and cost reduction and environmental load reduction in a washing step. A manufacturing method of a bottomed cylindrical body includes a drawing step of drawing a metal sheet by use of forming members each of which has a hardness of Hv 1500 to 12000 at its processing surface, and an ironing step of ironing a workpiece into the bottomed cylindrical body via a coolant by use of forming members each of which has a carbon film at its processing surface, and the coolant is a water-soluble coolant or a coolant having a boiling point of lower than 300° C.

Abstract: There is provided a method for manufacturing a bottomed cylindrical body, the method being capable of achieving both a conventional hard can manufacturing process such as drawing and ironing and reduction in the cost and the environmental load in a degreasing step. The method for manufacturing a bottomed cylindrical body includes a lubricant application step of applying liquid (lubricant) having a viscosity of lower than 200 mPa·s to a surface of a metal plate, a drawing step of drawing the metal plate to which. the lubricant has been applied, with use of a forming member having a processing surface having a hardness of Hv 1000 to 12000, an ironing step of ironing, with use of another forming member having a processing surface having a hardness of Hv 1500 to 12000, a workpiece with a coolant interposed between the workpiece and the another forming member, to form a bottomed cylindrical body, and a degreasing step of degreasing oil on a surface of the bottomed cylindrical body with use of a cleaning agent.

Abstract: [Object] A pressing die and a press working method that can achieve both facilitation of management of an appropriate clearance and working durability at a high level are provided. [Solving Means] The pressing die of the present invention is a pressing die for press working a metal material using a punch part and a die part. A working surface of one of the punch part and the die part is coated with a diamond film the working surface contacting with the metal material. A working surface of the other one of the punch part and the die part is coated with a surface treatment film having a Vickers hardness of 8000 Hv or less the working surface contacting with the metal material.

Abstract: Provided is a machining jig on which a carbon film (3) is formed on a machining surface of a rigid substrate (1), in which the carbon film (3) indicates a Raman spectroscopy spectrum with an intensity ratio, represented by the formula: ID/IG (where ID is the maximum peak intensity at 1333±10 cm?1 in the Raman spectroscopy spectrum of the carbon film surface, and IG is the maximum peak intensity at 1500±100 cm?1 in the Raman spectroscopy spectrum of the carbon film surface), exceeding 0.6. Also provided is a method of manufacturing seamless can bodies, the method including a step of using a mold machining member, on which a diamond film is formed on a machining surface, to press work a metal material onto the machining surface of the mold machining member in a state where a coolant is interposed.

Abstract: A jig for metal plastic working for use in plastic working of a metal or alloy workpiece, in which a working surface is moved relative to the workpiece in contact with the workpiece. The working surface of the jig is smoothed so that an arithmetic mean surface roughness Ra is not more than 0.12 ?m, and so that no protrusion is observed that has a width of not less than 200 ?m and a height of not less than 10 ?m, which are calculated on a basis of a projection thereof along a working direction.

Abstract: A method of producing aluminum cans, including an ironing step using an ironing die (30). The ironing die has a carbon film (50) formed as to cover a working surface thereof. The carbon film exhibits a Raman spectrum such that an intensity ratio represented by ID/IG wherein ID is a maximum peak intensity at 1333±10 cm?1 in the Raman spectrum of the surface of said carbon film, and IG is a maximum peak intensity at 1500±100 cm?1 in the Raman spectrum of the surface of said carbon film, is not less than 1.2. The surface of the carbon film is a smooth surface having an arithmetic mean roughness R of not more than 0.05 ?m. Further, the ironing step includes iron-working an aluminum sheet in a dry process using no lubricant while maintaining an ironing ratio in excess of 40%.

Abstract: A metallic worked article suppressing the worked surfaces from being scratched during the plastic work that is conducted aiming at reducing the thickness or decreasing the diameter. The metallic worked article has a reduced thickness or a decreased diameter as obtained through the plastic work, wherein on the worked surface thereof, the ratio Ra1/Ra2 of an arithmetic mean roughness Ra1 measured in a direction at right angles with the direction of working and an arithmetic mean roughness Ra2 measured in the direction of working, is from 0.5 to 1.5.

Abstract: The diamond surface polishing method according to the present invention involves polishing a polished object, the surface of which is made of diamond, by rubbing a polishing member having an elongated shape such as a linear or belt-like shape and containing at least a metal or a metal oxide against the diamond surface, wherein a pressing force of the polishing member is controlled in accordance with material properties of the polishing member and/or a shape of the polished object and a diamond crystal size in a rubbing section so that contact surface pressure in a machining area becomes uniform.

Abstract: A die (30) for ironing working, the die (30) having a carbon film 50 covering at least a working surface (41) thereof, the carbon film (50) exhibiting such a Raman spectrum that an intensity ratio represented by the following formula (1): ID/IG??(1) wherein ID is a maximum peak intensity at 1333±10 cm?1 in the Raman spectrum of the surface of the carbon film, and IG is a maximum peak intensity at 1500±100 cm?1 in the Raman spectrum of the surface of the carbon film, is not less than 1.0, and the surface of the carbon film 50 being a smooth surface having an arithmetic mean roughness R of not more than 0.1 ?m.

Abstract: The diamond surface polishing method according to the present invention involves polishing a polished object, the surface of which is made of diamond, by rubbing a polishing member having an elongated shape such as a linear or belt-like shape and containing at least a metal or a metal oxide against the diamond surface, wherein a pressing force of the polishing member is controlled in accordance with material properties of the polishing member and/or a shape of the polished object and a diamond crystal size in a rubbing section so that contact surface pressure in a machining area becomes uniform.

Abstract: The present invention relates to a long article, such as belts or junction means of buckle members for wearing, such as bag articles including magazine pouches that are used by those who handle machine guns in terrorism incidents and fights, magazine belts or vests that become members for attaching the magazine pouches, or junction means of buckle members for attaching magazine pouches and the like. The object of the present invention is to provide various kinds of buckles which are made of engineering polymers, titanium and stainless steel plates and the like in order to meet requirements for the modernization of equipment, which are novel and strong and permit easy attachment, which are lightweight and easy to carry, and in which male and female members do not disengage from each other, and a junction device that can release the junction of the buckles in an emergency and as required.

Abstract: An aluminium alloy with superior thermal neutron absorptivity contains 0.2-30 wt. % of Gd. An aluminium alloy for an wrought material with high-temperature strength contains 0.2-20 wt. % of Gd and 0.5-6 wt. % of Mg. An aluminium alloy for casting contains 0.2-10 wt. % of Gd and 6-12 wt. % of Si.