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公开(公告)号：JP2003088959A
公开(公告)日：2003-03-25
申请号：JP2001280899
申请日：2001-09-17
Applicant: MITSUI SHIPBUILDING ENG
Inventor： UCHIYAMA IZUMI , ONO YUTAKA , IRIE TAKAHIRO
Abstract: PROBLEM TO BE SOLVED: To provide an underwater welding nozzle which can ensure a high cavity part maintaining effect even when a base material is welded in an inclined manner. SOLUTION: This underwater welding nozzle 1 has a gas feed port 8 to feed a shielding gas to a nozzle tip part 2. A cylindrical shield wall 9 is protruded from a tip of a nozzle tip part 2, and a space inside the shield wall 9 forms a pressure chamber 10 for forming a cavity part filled with the shielding gas fed from the gas feed port 8. An ejection port 11 for ejecting curtain water in a skirt manner is provided on the outer circumferential side of the shield wall 9 at the nozzle tip part 2, and a space between a water curtain W formed by the curtain water ejected from the ejection port 11 and the shield wall 9 forms a buffer chamber 14.
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公开(公告)号：JPH07331464A
公开(公告)日：1995-12-19
申请号：JP12369994
申请日：1994-06-06
Applicant: MITSUI SHIPBUILDING ENG
Inventor： HAMANAKA YOSHITAKA , ONO YUTAKA
Abstract: PURPOSE:To form a metallic vapor-deposited film resulting from an arc discharge on a substrate with good adhesion by applying a high-frequency etching as the pretreatment in the formation of an arc vapor-deposited film. CONSTITUTION:An RF power source 7 is provided separately from a DC power source 6 for arc vapor deposition. A cathode 4 is firstly lowered, and an insertion hole 9A is closed by placing a partition member 11 at a first position. An RF voltage is impressed between an RF etching electrode 8 and a substrate 10 to be vapor-deposited on a holder 9 from the power source 7, and an inert gas is introduced to conduct RF etching. The power source 7 is then turned off, and the introduction of the inert gas is stopped. The partition member 11 is placed at a second position, and the cathode 4 is raised to a position 4A. A vacuum vessel 1 is then evacuated, a DC voltage is impressed from the power source 6 to conduct arc vapor deposition, and a metallic vapor-deposited film is formed on the substrate 10.
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公开(公告)号：JPH0641728A
公开(公告)日：1994-02-15
申请号：JP19539692
申请日：1992-07-22
Applicant: MITSUI SHIPBUILDING ENG
Inventor： MATSUNAGA TSUNEFUMI , ONO YUTAKA , HARADA HIROYUKI
Abstract: PURPOSE:To easily and efficiently form a coating film excellent in water repellency and durability to desired thickness on the surface of a member comprising resin, ceramics, or metal. CONSTITUTION:In a vacuum chamber 1 a metallic body as an anode 2 and a vaporizable metal as a cathode 3 are placed, DC voltage is applied between the anode 2 and cathode 3 to effect arc discharge while oxygen is introduced into the vacuum chamber 1 to form a coating film consisting of a metal oxide produced by the reaction of vaporized metal and oxygen on the surface of a base material 4. The metal oxide coating film formed by vacuum arc vapor deposition is dense and uniform and has high hardness and excellent durability and significantly good water-repellent function compared with a conventional silicone resin coating film or polytetrafluoroethylene resin coating film. Moreover, by vacuum arc vapor deposition, the water-repellent coating film can be formed into desired film thickness.
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公开(公告)号：JP2002018572A
公开(公告)日：2002-01-22
申请号：JP2000201084
申请日：2000-07-03
Applicant: MITSUI SHIPBUILDING ENG
Inventor： UCHIYAMA IZUMI , ONO YUTAKA , IRIE TAKAHIRO
Abstract: PROBLEM TO BE SOLVED: To form stable voids around an arc and a molten pool when welding in a vertical position. SOLUTION: A nozzle for underwater welding is composed so that a Fallopian tube shaped water curtain d is formed by curtain water w being spouted out from the water curtain outlet 16 of the welding nozzle 1, and a local void e is formed inside the water curtain d by a shielding gas (a) flowed inside the water curtain d from a shielding gas spouting-out hole 11. The shielding gas spouting-out hole 11 and a torch 2 are tilted toward an oblique lower part to the welding nozzle 1.
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公开(公告)号：JPH0641726A
公开(公告)日：1994-02-15
申请号：JP19539792
申请日：1992-07-22
Applicant: MITSUI SHIPBUILDING ENG
Inventor： MATSUNAGA TSUNEFUMI , ONO YUTAKA , HARADA HIROYUKI
IPC: C23C14/20 , C23C14/24 , D06M11/00 , D06M11/83 , D06M101/00 , D06M101/16 , D06M101/30 , D06M101/32 , D06M101/34
Abstract: PURPOSE:To easily and efficiently form a metallic film or a film consisting of a metallic oxide, metallic nitride or metallic carbide or a mixture composed of these metallic compds. and metal on a synthetic fiber sheet. CONSTITUTION:A metallic body is placed as an anode 2 and an evaporatable metallic body as a cathode 3 respectively into a vacuum vessel 1 and an arc discharge is effected by impressing a DC voltage to the anode 2 and the cathode 3, by which the film of the evaporated metal is formed on the surface of the synthetic fiber sheet 4. Gaseous oxygen, nitrogen or a lower hydrocarbon is introduced into the vacuum vessel 1 and the film of the metallic compd. formed by the reaction of the evaporated metal and the introduced gas or the film mixture composed of the metallic compd. and the metal is formed on the surface of the synthetic fiber sheet.
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Patent Agency Ranking
公开(公告)号：JP2002018573A
公开(公告)日：2002-01-22
申请号：JP2000201082
申请日：2000-07-03
Applicant: MITSUI SHIPBUILDING ENG
Inventor： ONO YUTAKA , IRIE TAKAHIRO
Abstract: PROBLEM TO BE SOLVED: To perform sound welding by increasing the closed degree of a welding place facing a welding torch. SOLUTION: By arranging respective pressure rollers 3, 4 in front of and behind the welding torch 2, the closed degree of the lap part 9 of sheet metals facing the above welding torch 2, is increased.
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公开(公告)号：JPH0881764A
公开(公告)日：1996-03-26
申请号：JP22017894
申请日：1994-09-14
Applicant: MITSUI SHIPBUILDING ENG
Inventor： ONO YUTAKA , HAMANAKA YOSHITAKA , MATSUNAGA TSUNEFUMI
IPC: C23C14/24 , D06M11/00 , D06M11/83 , D06M101/00 , D06M101/16 , D06M101/30
Abstract: PURPOSE: To stabilize the arc discharge and improve the vapor deposition efficiency at the time of conducting the vacuum deposition with a low-m.p. metal as a cathode by laying a cover on a tip of the cathode opposed to an anode to prevent the deformation and melting of the part. CONSTITUTION: An anode 2 and a long-sized low-m.p. metal such as lead, tin and zinc as a cathode are opposed in a vacuum vessel, a DC voltage is impressed on both electrodes to generate an arc, and the metal from the cathode 3 is vapor-deposited on a material 4 to be coated. In this case, a cover 40 consisting of a metal having a higher m.p. than the metal constituting the cathode 3 is laid on the tip of the cathode 3, and then an arc is generated. Any material capable of protecting the low-m.p. metal of cathode 3 can be used for the cover 40, and the stainless steel and general structural steel having 1-5 mm thickness are usually used. Meanwhile, a lightweight and insulating shielding plate 42 is preferably provided to separate the tip of the cathode 3 furnished with the cover 40 and the region around the base end of the cathode.
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公开(公告)号：JPH07155959A
公开(公告)日：1995-06-20
申请号：JP30668493
申请日：1993-12-07
Applicant: MITSUI SHIPBUILDING ENG
Inventor： ONO YUTAKA , SHIMAMURA KAZUO , SUZUKI TSUNEO
Abstract: PURPOSE:To provide a welding torch which can reduce breaking of an electric current cable. CONSTITUTION:The welding torch comprises a gas spouting nozzle 14 having a guide member to guide a welding wire 5 in the inside, a handle member 13 installed at an end of the nozzle 14 for an operator to grip, a protecting member 12, and a cable 11. Then, the cable 11 comprises a gas hose 3 to pass the gas and an electric current cable 2 to make flow current outside a cylindrical composite liner 4 having flexibility to guide the welding wire 5, arranged in concentrically, an end of the cable is inserted into the opening part formed on the handle member 13 through the cylindrical protecting member 12. Here, in the electric current cable 2, plural fine wires having conductivity are arranged in a mesh like. Therefore, the life of the welding torch can be prolonged.
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公开(公告)号：JPH07113161A
公开(公告)日：1995-05-02
申请号：JP25974293
申请日：1993-10-18
Applicant: MITSUI SHIPBUILDING ENG
Inventor： ONO YUTAKA , HAMANAKA YOSHITAKA , MATSUNAGA TSUNEFUMI
IPC: C23C14/24
Abstract: PURPOSE:To facilitate the arc control and carry out the uniform and efficient deposition by applying a DC current to a spiral metallic coil arranged on the outer circumference of the cathode in a vacuum container, and generating the electromagnetic force to travel the arc in the spiral and regular manner. CONSTITUTION:A DC voltage 13 is applied between the anode 2 and a cathode 2 arranged in a vacuum container 1 to achieve the arc discharge, and the metal (e.g. nickel and chromium) is evaporated from the cathode 3 to achieve the vacuum deposition onto the article 4 to be coated (e.g. synthetic fiber and plastic plate). In this method, a metallic coil 29 is spirally arranged on the outer circumference of the cathode 3. This coil 29 is made of copper, and the cooling water is passed inside. The DC current 30 is applied to the coil 29, and the electromagnetic force generated thereby makes the arc travel in the spiral manner.
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公开(公告)号：JPH0639994A
公开(公告)日：1994-02-15
申请号：JP19539592
申请日：1992-07-22
Applicant: MITSUI SHIPBUILDING ENG
Inventor： MATSUNAGA TSUNEFUMI , ONO YUTAKA , HARADA HIROYUKI
Abstract: PURPOSE:To carry out chroming without causing environmental contamination and deterioration of working conditions by a method wherein after applying electrocopper plating on a surface of a gravure printing roller, an irregularity corresponding to a printing original is given, and a coating film of chromium or a chromium compound is formed by vacuum deposition. CONSTITUTION:A gravure printing halftone screen is printed on an electrocopper plated gravure printing roller. Further, a carbon tissue having bichromate as sensitizing main agent on which a transparent positive of an original drawing is printed is transferred onto the printing roller. Then, a coating film of chromium or a chromium compound is formed by vacuum deposition. That is, the gravure printing roller 4 is arranged in a vacuum container 1 and after roughly vacuuming from atmospheric pressure inside the vacuum container 1 with an oil-sealed rotary vacuum pump 5, the inside of the vacuum container 1 is made about 10 Torr with an oil diffusion pump 8. Then, d.c. voltage is impressed between an anode 2 and a cathode 3, and chromium is vacuum deposited by carrying out arc discharge while the roller 4 is being rotated.
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