An inter-travel-paths transport device transports articles between a first article transfer location and a second article transfer location. It extends in a space upwardly of the article processing devices and connects the first and second article transfer locations. A first transport device transfers an article to or from an article transferring point by vertically moving its holding portion and of transferring an article to or from the first article transfer location by slidingly moving the holding portion at a position which overlaps with the first travel path portion. A second movement slide transport device vertically transfers an article to or from an article transferring point in the same manner with respect to the second travel path portion.

Article transport facility

A process and system are provided for forming shaped air holes, such as for use in turbine blades. Aspects of the disclosure relate to forming shaped portions of air holes using a short pulse laser, forming a metered hole corresponding to each shaped portion, and separately finishing the shaped portion using a short-pulse laser. In other embodiments, the order of these operations may be varied, such as to form the shaped portions and to finish the shaped portions using the short-pulse laser prior to forming the corresponding metered holes.

Process and system for forming shaped air holes

Method for hole machining with picosecond laser

A cylindrical drum, which comprises a sheet of maraging steel with welded opposite ends, is severed into a plurality of rings of predetermined width, and the rings are rolled to a predetermined length, after which circumferential lengths of the rings are corrected. The rings are aged by placing the rings into an aging chamber, heating the aging chamber to a predetermined aging temperature, and keeping the rings at the predetermined aging temperature for a predetermined period of time. Thereafter, the rings are nitrided by transferring the rings from the aging chamber into a nitriding chamber which is disposed independently of the aging chamber and has been heated to a predetermined nitriding temperature, while maintaining the rings at the aging temperature, keeping the rings at the nitriding temperature in an atmosphere containing at least an ammonia gas for a predetermined period of time, and cooling the rings. The rings are fitted and stacked together into a laminated ring for use as a belt in transmitting power in a continuously variable transmission.

Method of manufacturing laminated ring and heat treatment apparatus for use in such method

A maraging steel is subjected to the aging to have a hardness of more than 500 Hv. A nitrided case is formed to have a depth that is about 20% to 50% to a ½ thickness of the maraging steel plate. An endless ring for a metal belt is constructed by the above maraging steel. According to methods of manufacturing the maraging steel and the endless ring, the nitrided case having the depth that is 20% to 50% of a distance from a plate surface to a center can be formed by executing an aging to have the hardness of more than 500 Hv, then executing a nitriding in the nitrogen atmosphere to which organic chloride is added.

Nitrided maraging steel and method of manufacturing thereof

A metal ring polishing method and device capable of polishing the lateral end edge of a metal ring without performing barrel polishing or polishing by a grindstone. Subsequent to loading process for loading a metal ring (W) by a loading means (6), a first blush polishing process is performed for polishing one end edge of the metal ring (W) by a polishing brush (60). Then, a reversing process is performed for reversing the metal ring (W), having its one end edge polished by the first brush polishing process, by a reversing means (10). Subsequently, a second blush polishing process is performed for polishing the other end edge of the metal ring (W), reversed by the reversing process, by a polishing brush (60). And a sweep-out process is performed for sweeping out the metal ring, having the other end edge polished by the second blush polishing process, by a sweep-out means (7).

Method and device for polishing endless belt metal rings for continuously variable transmission

A device for correcting the circumferential length of a metal ring comprising a drive roller (2) and a driven roller (3) to which a metal ring W can be fixed under proximate state, a correction roller (4) disposed between both rollers, a first displacement imparting means (10) for displacing the drive roller (2) and the driven roller (3) in the direction separating relatively when the metal ring W is fixed to the drive roller (2), the driven roller (3) and the correction roller (4), means (21, 22) for holding a specified interval between the drive roller (2) and the driven roller (3) when a displacement imparted by the first displacement imparting means (10) is released, a second displacement imparting means (27) for correcting the circumferential length of the metal ring W by displacing the correction roller (4) in a direction for elongating the metal ring W orthogonal to the displacing direction of the drive roller (2) and the driven roller (3), and means (19) for displacing the drive roller (2) and the driven roller (3) in the direction approaching each other when a displacement imparted by the first and second displacement imparting means (10, 27) is released.

Device for correcting circumferential length of metal ring

PROBLEM TO BE SOLVED: To provide a nitriding treatment holder that can assure a superior quality metallic ring when used in gas nitriding or gas soft nitriding process. SOLUTION: A maraged thin steel sheet 1 is butt-welded at its opposing ends to form a cylindrical drum 2 that is then sliced into a specified width to produce a ring 4, which is nitrided by the nitriding treatment holder under this invention. The holder is equipped with a hanging means 14 to hang the ring 4, and over the contact area 15 or the holder that comes into contact with the ring 4, net-shaped pure nickel 16 is placed. When a plurality of metallic rings 4a and 4b which are different in circumferential length are hung one after another on the holder concentrically, net-shaped pure nickel 17 is placed in between the metallic rings 4a and 4b.

Nitriding treatment holder for metallic ring

A laminated ring for use as a belt in transmitting power in a continuously variable transmission is produced by welding opposite ends of a sheet (1) of maraging steel to produce a plurality of rings (3), and rolling said rings to a predetermined length. The rings (4) are nitrided in a salt-bath nitriding process by dipping the rings in a molten salt composition containing 38 - 46% of CNO- and 1-2% of CN- and heated to a temperature in the range from 480 to 530°C, for a period of time ranging from 10 to 25 minutes. The nitrided rings (4) are finally stacked into a laminated ring.

Katsuyuki Nakajima

Papers

Method of manufacturing laminated ring and heat treatment apparatus for use in such method

Method and device for polishing endless belt metal rings for continuously variable transmission

Device for correcting circumferential length of metal ring

Nitriding treatment holder for metallic ring

Method of manufacturing laminated ring and molten salt composition for use in such method