検索結果 2112件中 1-20 を表示

  • アルミニウム溶接における狭窄ティグアークの熱源特性解析

    小西 恭平 , 茂田 正哉 , 田中 学 , 村田 彰久 , 村田 唯介 , Murphy Anthony B.

    軽金属溶接 = Journal of light metal welding : 軽金属溶接協会誌 55(6), 227-232, 2017-06

  • 平板状ワンターンコイルを用いる金属薄板の電磁圧接 (ものづくり研究会 金属産業応用一般)

    石橋 正基 , 岡川 啓悟

    電気学会研究会資料. MZK 2017(1-7), 13-18, 2017-03-24

  • 構造体のヒステリシス評価と力学モデルの構築

    河内 毅 , 栗山 幸久 , 鈴木 克幸

    … <p>In order to clarify the mechanism of the vehicle body hysteresis affecting "rigidity feeling", one of the driver's sensory evaluation in the driving test, the influence of friction acting on spot welding flanges on hysteresis, which is drawn by displacement - load diagram under static or relatively slow deformation of double-hat-shaped parts assembled by spot welding, is experimentally evaluated. …

    日本機械学会論文集 83(855), 17-00334-17-00334, 2017

    J-STAGE

  • Welding Characteristics and Effect of Gap Length on 2000 Series Aluminum Alloy Sheet Lap Joints Welded by Magnetic Pulse Welding

    Itoi Takaomi , Inoue Syoichi , Okagawa Keigo

    … <p>Effect of gap length on welding characteristics of 2000 series aluminum alloy sheets in magnetic pulse welding (MPW) was investigated. … This result indicates that it is possible to join sheets at a higher collision speed even with the same discharge energy by adjusting an appropriate gap length. … Strong lap joint was achieved for the 2024-T3/2024-T6 and the 2024-T3/7075-T6 lap joint sheets by welding condition of gap length more than 1.0 mm. …

    MATERIALS TRANSACTIONS 58(12), 1629-1635, 2017

    J-STAGE

  • Evaluation Method for Low Temperature Toughness of Weld Seam of HFW Pipe Based on the Distribution of Scattered Type Penetrator

    Matsui Yutaka , Iizuka Yukinori , Okabe Takatoshi , Inoue Tomohiro

    … <p>We found the correlation between low temperature toughness of the weld seam and the echo level from a scattered-type penetrator consisting of micro oxides in high frequency welding pipes. … Absorbed energy obtained by Charpy impact test can be evaluated by the ultrasonic echo amplitude with the optimized focused beam size (about 1 mm<sup>2</sup>) to detect the scattered-type penetrators.</p> …

    ISIJ International 57(11), 2010-2015, 2017

    J-STAGE

  • Visualization and Analysis of Groove Residual Magnetism for Narrow Gap Arc Welding

    Wang Jiayou , Huang Ping , Zhu Jie , Zhu Xiaoyu

    … <p>Residual magnetism obviously exists in welding groove of high strength steel and thus influences narrow gap arc welding quality. … The present work investigates the characteristics of residual magnetism for <i>U</i>-shape welding groove, and reveals its formation mechanism by physically modeling the residual magnetism. …

    ISIJ International, 2017

    J-STAGE

  • 構造体のヒステリシス評価と力学モデルの構築

    河内 毅 , 栗山 幸久 , 鈴木 克幸

    … <p>In order to clarify the mechanism of the vehicle body hysteresis affecting "rigidity feeling", one of the driver's sensory evaluation in the driving test, the influence of friction acting on spot welding flanges on hysteresis, which is drawn by displacement - load diagram under static or relatively slow deformation of double-hat-shaped parts assembled by spot welding, is experimentally evaluated. …

    日本機械学会論文集, 2017

    J-STAGE

  • 経年橋梁に使用された鋼材の材料特性および溶接性に関する基礎的検討

    廣畑 幹人

    … However, the Charpy absorbed energy of aged steels at 0°C were extremely low. … Welding defects were observed in the repair welded parts of aged steel bridges. … Although a weld cracking test was performed on the same steel of which the chemical compositions were not suitable for welding, weld crack was not generated. … That is, patch plate welded joints with small thickness generated the small restraint during welding. …

    鉄と鋼 103(11), 629-635, 2017

    J-STAGE

  • 2000系アルミニウム合金板の電磁圧接における間隙長の効果と接合特性

    糸井 貴臣 , 井上 祥一 , 岡川 啓悟

    … <p>Effect of gap length on welding characteristics of 2000 series aluminum alloy sheets in magnetic pulse welding (MPW) was investigated. … This result indicates that it is possible to join sheets at a higher collision speed even with the same discharge energy by adjusting an appropriate gap length. … Strong lap joint was achieved for the 2024-T3/2024-T6 and the 2024-T3/7075-T6 lap joint sheets by welding condition of gap length more than 1.0 mm. …

    軽金属 67(9), 423-429, 2017

    J-STAGE

  • Preparation of Coating Material of Welding Electrode from Marine Placer via Carbothermic Reduction

    Hu Tu , Liao Xuefeng , Li Jie , Peng Jinhui , Zhang Libo , Yang Li , Li Zhaogang

    … <p>The preparation of coating material of welding electrode from marine placer via carbothermic reduction was systematically investigated. …

    ISIJ International 57(9), 1603-1608, 2017

    J-STAGE

  • 計算科学シミュレーションコード SPLICE を用いた金属光造形加エプロセスのレーザー照射条件の導出

    村松 壽晴 , 青柳 裕治 , 吉氏 崇浩

    … A general-purpose three-dimensional thermohydraulics numerical simulation code SPLICE was developed at Japan Atomic Energy Agency and designed to deal with gas-liquid-solid consolidated incompressible viscous flows with a phase change process in various laser applications, such as welding, coating, cutting, etc. …

    生産システム部門講演会講演論文集 2017(0), 304, 2017

    J-STAGE

  • 固有ひずみ理論に基づく3次元残留応力推定手法を用いた溶接配管のき裂進展量の確率論的評価

    小川 雅

    … Today, crack growth rate for each observed crack cannot be evaluated accurately without neutron diffraction and synchrotron X-ray diffraction due to the difficulty of nondestructive measurements of welding residual stresses in the thickness direction. … However, it is difficult to apply those nondestructive diffraction methods as on-site measurement techniques because the higher energy diffraction methods are available only in special irradiation facilities. …

    日本機械学会論文集 83(852), 16-00066-16-00066, 2017

    J-STAGE

  • アルミニウム合金薄板と低炭素鋼板の電磁圧接における接合特性に及ぼす加工条件と材料特性

    岡川 啓悟 , 石橋 正基 , 椛沢 栄基

    … <p>In this paper, we describe the joining property of welded sheets obtained by magnetic pulse welding. … Collision times are examined in various gap lengths for the four kinds of aluminum sheets in 2.0 kJ discharge energy experiments, and collision velocities are calculated using the collision times. … Magnetic pulse welding is phenomenon in a high strain rate and<b> …

    塑性と加工 58(679), 686-691, 2017

    J-STAGE

  • 電磁圧接によるAl/Cu 接合板の作製とその界面組織観察

    糸井 貴臣 , 鈴木 亮 , 佐々木 雅史 , 岡川 啓悟

    … <p>Al<tt>/</tt>Cu lap joint sheets were fabricated by magnetic pulse welding <tt>(</tt>MPW<tt>)</tt>. … A strong lap joint was achieved at a discharge energy more than 0.9 kJ. … When the welding at an adequate amount of discharge energy, weld interface showed wavy morphology. … Weld width of the lap joint sheets tend to increase with increasing of discharge energy for welding. …

    軽金属溶接 55(8), 290-299, 2017

    J-STAGE

  • アルミニウム溶接における狭窄ティグアークの熱源特性解析

    小西 恭平 , 茂田 正哉 , 田中 学 , 村田 彰久 , Anthony B. Murphy

    … <p>Tungsten Inert Gas <tt>(</tt>TIG<tt>) </tt>welding with a constricted nozzle is one of new higher-level welding processes. … This process achieves a welding of quite thin sheet metal whereas it is di‹cult for the conventional TIG welding process. …

    軽金属溶接 55(6), 227-231, 2017

    J-STAGE

  • 固有ひずみ理論に基づく3次元残留応力推定手法を用いた溶接配管のき裂進展量の確率論的評価

    小川 雅

    … Today, crack growth rate for each observed crack cannot be evaluated accurately without neutron diffraction and synchrotron X-ray diffraction due to the difficulty of nondestructive measurements of welding residual stresses in the thickness direction. … However, it is difficult to apply those nondestructive diffraction methods as on-site measurement techniques because the higher energy diffraction methods are available only in special irradiation facilities. …

    日本機械学会論文集, 2017

    J-STAGE

  • Fabrication of 2000 Series Aluminum Alloy Lap Joint Sheets by Magnetic Pulse Welding and Their Interfacial Microstructure Observations

    Itoi Takaomi , Inoue Syoichi , Okagawa Keigo

    … <p>Lap joint sheets of 2017-T3/2017-T3 and 2024-T3/2024-T3 were fabricated by magnetic pulse welding (MPW). … Tensile shear tests were performed on the welded sheet, and a good lap joint was achieved at a discharge energy more than 3.0 kJ for both lap joint sheets. … Weld interface showed wavy morphology when bonding at an adequate amount of discharge energy. … Weld width of the lap joint sheets tend to increase with increasing of discharge energy. …

    MATERIALS TRANSACTIONS 58(8), 1118-1126, 2017

    J-STAGE

  • サブマージアーク溶接現象のモデル化とその熱源特性に関する実験的検討

    古免 久弥 , 松井 翔 , 小西 恭平 , 茂田 正哉 , 田中 学 , 加茂 孝浩

    … Computational model of submerged arc welding (SAW) was developed to clarify the arc phenomena and the heat source characteristics. … To investigate the effect of the closed space on arc phenomena, the heat flux and current density distributions on a base metal surface during closed gas tungsten arc welding were measured by split anode method. … However, its heat input to the base metal was almost the same as that of gas metal arc welding. …

    溶接学会論文集 35(2), 93-101, 2017

    J-STAGE

  • ステンレス鋼のファイバレーザ溶接におけるハブラニアンプロット結果に関する考察

    部谷 学 , 坪井 昭彦 , 田川 正雄

    … <p>We analyzed the Hablanian plot results of the welding data using only fiber lasers for stainless steel (SUS304). … (1) Micro welding results located above the standard fitting curve for welding data using CW fiber lasers. … and <i>P</i>/(<i>θtk</i>) regions, the experimentally obtained penetration depth was ∼20% of that without any losses of a laser energy. …

    電気学会論文誌A(基礎・材料・共通部門誌) 137(5), 271-277, 2017

    J-STAGE

  • 70MPa水素ステーション実証試験で使用されたプレクーラー冷却パイプの事例解析

    松岡 三郎 , 濱田 繁 , 井藤賀 久岳 , 中村 眞実 , 岡﨑 三郎 , 松永 久生

    … Main pipe and mechanical joint pipe were joined by TIG welding. … Chemical composition analysis, microstructure observation and Vickers hardness measurement showed that the main pipe and the mechanical joint pipe were manufactured from SUS316L, and that the filler metal of TIG welding was 316L. …

    日本機械学会論文集 83(848), 16-00459-16-00459, 2017

    J-STAGE

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