Search Results 1-20 of 305

  • Application of Specific Energy in Evaluation of Geological Conditions Ahead of Tunnel Face

    Liu Jiankang , Sakaguchi Osamu , Ishizu Sodai , Luan Hengjie , Han Wei , Jiang Yujing

    … While conventional horizontal boring conducted from a tunnel face provides good accuracy, it is infrequently conducted due to its high cost and time-consuming nature. … This paper presents a new approach based on the specific energy of the mechanical drilling rig to evaluate the geological conditions ahead of the tunnel face. …

    Energies 13(4), 909, 2020-02-18

    IR 

  • Development of the measurement technique for residual stress in actual components by hole drilling method:(Measurement procedure for improvement of accuracy)  [in Japanese]

    YAMAGUCHI Tomoya , KURODA Masatoshi , KAMAYA Masayuki

    … The hole drilling method is a method of measuring a residual stress from a strain change caused by drilling a surface of a measurement object. … In the hole drilling method, a measurement error may occur depending on the state of the measurement object and the measurement method. … In this study, a method for improving the residual stress measurement accuracy by the hole drilling method was examined based on the principle of the measurement. …

    The Proceedings of the Materials and Mechanics Conference 2019(0), OS1302, 2019

    J-STAGE 

  • Examination of air cooling effect in small hole drilling of PEEK  [in Japanese]

    ITO Shogo , NOMURA Mitsuyoshi , FUJII Tatsuya , SUZUKI Tsunehisa

    … However, PEEK, which is a thermoplastic resin, has a problem that the hole accuracy is lowered due to the cutting heat. … This paper describes drilling experiments with cooling on workpiece by cold air. … As a result, it was found that cooling the workpiece is effective to suppressing the cutting heat and improve hole accuracy. …

    The Proceedings of The Manufacturing & Machine Tool Conference 2019.13(0), A30, 2019

    J-STAGE 

  • Examination of drilling condition monitoring method by semiconductor strain sensor  [in Japanese]

    OZAWA Hiroki , SAKAI Katsuhiko , SHIZUKA Hiroo , OKADA Ryoji , MIYAJIMA Kentaro

    … In the drilling process, in order to avoid the breakage of the tool and the decrease in the processing accuracy due to the progress of the tool wear, it is required to establish the monitoring technology of the processing state during the cutting process that can be used at the production site. …

    The Proceedings of The Manufacturing & Machine Tool Conference 2019.13(0), A32, 2019

    J-STAGE 

  • Digital Image Correlation on FIB Ring-Core Measurement on Residual Stress of Thin Films

    Chou Yun-Chia , Lin Wen-Yen , Pan Wen-Chieh , Lin Ming-Tzer , Chen Terry Yuan-Fang

    … For the present study, DIC with proper image correlation criteria postulated in the previous study was performed to obtain stability and accuracy for the specimen images. … The images were acquired by incremental focused ion beam (FIB) ring-core drilling with various depth steps. … In this study, a digital correlation (DIC) of the specimen images acquired by incremental focused ion beam (FIB) ring-core drilling with various depth steps was performed. …

    The Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2019(0), 1008B1145, 2019

    J-STAGE 

  • WOB Estimation during Ultra-deep Ocean Drilling by Use of Recurrent Neural Networks  [in Japanese]

    Kaneko Tatsuya , Wada Ryota , Ozaki Masahiko , Inoue Tomoya

    … <p>Ultra-deep ocean drilling is expected to develop to deeper and deeper fields. … Such drilling has some problems. … One of them is that weight on bit (WOB) can not be measured in real time, that is important for drilling operation. … However, previous studies have shown insufficient accuracy of physics-based models. …

    Journal of the Japan Society of Naval Architects and Ocean Engineers 29(0), 123-133, 2019

    J-STAGE 

  • Accuracy Validation of Measurement of Through-Thickness Residual Stress in Multi-Pass Welded Joints of Very Thick Plate by Deep Hole Drilling Techniques  [in Japanese]

    KAWAI Shinji , OKANO Shigetaka , MURATA Tomohiro , MOCHIZUKI Masahito , NAGAI Takuya

    … In this study, semi-destructive methods of conventional deep hole drilling (DHD) and incremental DHD (iDHD) techniques and destructive method using strain gauge were applied, respectively, to measure through-thickness residual stress in multi-pass welded joints of 100mm thick plate. … Through the comparison among them, the applicability and measurement accuracy of conventional and incremental DHD techniques for the welds were discussed. …

    Journal of High Pressure Institute of Japan 57(3), 162-170, 2019

    J-STAGE 

  • Spatial Estimation and Face-forward Prediction of Elution Amount of Arsenic in Mountain Tunneling Using Geostatistics  [in Japanese]

    KUBO Taiki , OKUZAWA Koichi , KOIKE Katsuaki

    <p>トンネル切羽前方の重金属濃度を予測する手法の開発を目的として,四万十層群中で掘削された山岳トンネルをケーススタディに選び,ヒ素溶出量に着目した.ヒ素溶出量データには明瞭な空間的相関性が存在し,そのセミバリオグラムは球モデルによく適合し,普通クリギング(OK)でも対象区間全体のヒ素溶出量分布の特徴を明らかにできた.切羽前方予測を模擬した解析でも,前方3 m以内であればOKの予測精度 …

    Geoinformatics 30(2), 51-58, 2019

    J-STAGE 

  • Development and Verification of the Rock Blasting Management System Using ICT  [in Japanese]

    YAMAGAMI Masahito , KATAYAMA Saburou , ICHIKI Takashi , ARAI Hiroyuki

    <p>ダム建設における骨材製造工事では,事前調査の限界により骨材となる原石の賦存モデルの精度が十分ではないため,これまで採取効率を高めることに限界があった。また,発破孔削孔作業における測量・検測および発破後の岩質判定は人力や目視で行われており,機械化による省力化と高精度化が望まれていた。そこで,採取効率向上や省力化によるコスト縮減を目的として,ダム原石採取管理システム「T-iBlast …

    Journal of Japan Society of Dam Engineers 29(2), 140-151, 2019

    J-STAGE 

  • Deformation analysis and hole diameter error compensation for hybrid robot based helical milling

    LI Hao , XU Qingshan , WEN Shimei , QIN Xuda , HUANG Tian

    … <p>As an innovative machining process for hole-making, helical milling (also known as orbital drilling) presents great potential in machining aircraft structures due to temperature and cutting force reduction, flexible kinematics, and improved borehole quality. … Meanwhile, the application of hybrid robot with their high accuracy and better stiffness are increased in aircraft assembly machining operations. …

    Journal of Advanced Mechanical Design, Systems, and Manufacturing 13(2), JAMDSM0041-JAMDSM0041, 2019

    J-STAGE 

  • Experimental and Numerical Study on Underwater Behavior of Rotating Drill Pipe  [in Japanese]

    鈴木 博善 , 土屋 慶太 , 井上 朝哉 , 勝井 辰博 , 千賀 英敬 , 永石 雄飛 , 野谷 勇介

    日本船舶海洋工学会講演会論文集 Conference proceedings, the Japan Society of Naval Architects and Ocean Engineers (27), 357-364, 2018-11

  • Development of the measurement technique for residual stress in actual components by hole drilling method:(Consideration of the factors affecting the measurement accuracy)  [in Japanese]

    YAMAGUCHI Tomoya , TANIGAWA Ryohei , KURODA Masatoshi , KAMAYA Masayuki

    … Hole drilling method is relatively simple and inexpensive, and can also measure the residual stress distribution in depth. … In the stress measurement by the hole drilling method, an error may occur depending on the state of the object to be measured or the measurement method. … In this study, factors affecting the measurement accuracy in the stress measurement by the hole drilling method were considered. …

    The Proceedings of the Materials and Mechanics Conference 2018(0), OS1205, 2018

    J-STAGE 

  • Accuracy Improvement of Through-Thickness Residual Stress Measurement by Deep Hole Drilling Technique for Welds  [in Japanese]

    MOCHIZUKI Masahito

    … Also, the distribution of residual stress on the welded surface was measured by X-ray diffraction method to verify the accuracy of the calculated results. … Based on the comparison among them, the effect of diameters of drilled hole and trepanned cylindrical sample on the accuracy of through-thickness residual stress measurement at welds by deep hole drilling technique was evaluated. …

    The Proceedings of the Materials and Mechanics Conference 2018(0), OS1203, 2018

    J-STAGE 

  • Some aspects of problem extraction and development of in-situ permeability test in the unsaturated zone  [in Japanese]

    NISHIGAKI Makoto , KANNO Yuichi , FUJITA Takahumi , MAKI Naoya , NISHIDA Nobukazu

    集中豪雨等に対して,斜面や堤防の安定性を検討するには,地盤の浸透特性を調査することが大切である。本研究では,不飽和地盤を対象にボーリング孔を利用して表層から数10m深部までの現場飽和透水係数を求める方法の有効性と精度を良く求める方法について検討した。その結果以下の事項が分かった。(1)透水係数の値は,地盤の初期飽和度に依存して変化することが分かった。(2)透水試験を実施する前にCO<sub& …

    Journal of Groundwater Hydrology 60(3), 289-304, 2018

    J-STAGE 

  • Selection of key temperature measuring points for thermal error modeling of CNC machine tools

    LIU Quan , CHEN Yuting , LOU Ping , YAN Junwei , HU Jiwei , XIAO Angran

    … In this paper, a selection method of key TMPs is presented to improve the accuracy and generalization of predictive models. … finally Wrapper method is used to test the candidate set of TMPs with cross-validation accuracy to find the key TMPs. … To validate this method, a test platform is built on the CNC gantry drilling machine ZK5540A. …

    Journal of Advanced Mechanical Design, Systems, and Manufacturing 12(7), JAMDSM0131-JAMDSM0131, 2018

    J-STAGE 

  • Data Report for quantitative analysis of mineral composition using powdered X-ray diffraction method and RockJock program  [in Japanese]

    Tanikawa Wataru , Tadai Osamu

    <p>岩石や堆積物を構成する鉱物の定量評価手法の一つとしてX線粉末回折データを用いた方法がある.米国地質調査所のEberl(2003)によって開発されたRockJockプログラムは無料で配布されていて,Excelマクロをベースとしたソルバーのため,比較的簡便に利用できる.定量可能な鉱物は90種以上もあるため,ほとんどの海底下掘削試料の分析に対応できる.一方,プログラムの解析精度と問題点 …

    JAMSTEC Report of Research and Development 27(0), 57-67, 2018

    J-STAGE 

  • Development of triangular interface element with drilling degrees of freedoms and its application to natural fiber reinforced carbon ceramics composite material  [in Japanese]

    KANDA Yasuyuki , FUKUMOTO Isao

    近年, 地球環境保護の高い社会的要請により, ウッドセラミックスのような植物に由来したカーボンセラミックス複合材料の研究開発がなされている. 著者らは, 植物由来カーボンセラミックス複合材料の高強度化と産業副産物であるサトウキビバガスの有効利用を目的に, バガス灰と炭化バガス繊維の植物繊維強化カーボンセラミックス複合材料を放電プラズマ焼結法により作製している. その結果, 不均一な長さの炭化バガス …

    Transactions of the Japan Society for Computational Engineering and Science 2018(0), 20180004-20180004, 2018

    J-STAGE 

  • Ultrasonic vibration drilling of small-diameter holes in glass(1st Report)Effects of ultrasonic vibration on hole registration accuracy  [in Japanese]

    米山 陽 , 清水 毅 , 石井 孝明 , 石黒 輝雄 , 佐野 正明

    Abrasive technology : 砥粒加工学会誌 : journal of the Japan Society for Abrasive Technology 61(11), 594-599, 2017-11

  • Study on Effect of Tool Wear on Drilled Hole Quality of Printed Circuit Boards  [in Japanese]

    KAWAHARA Hiroki , YOSHIMURA Hiromi , WATANABE Masahide

    … Series of PCBs drilling tests are carried out to investigate hole quality, hole location accuracy and hole wall roughness. … The hole location accuracy does not get worse with increasing flank wear of drill. … On the other hand, the hole location accuracy becomes worse with increasing margin wear of drill. …

    The Proceedings of Conference of Hokuriku-Shinetsu Branch 2017.54(0), F043, 2017

    J-STAGE 

  • Ultrasonic vibration drilling of small-diameter holes in glass:1st Report : Effects of ultrasonic vibration on hole registration accuracy  [in Japanese]

    YONEYAMA Akira , SHIMIZU Tsuyoshi , ISHII Takaaki , ISHIGURO Teruo , SANO Masaaki

    半導体製造装置や医療機器においては,φ1mmに満たない微細穴をガラスなどの脆性材料に高精度かつ高能率に加工する技術が要求されている.ガラスなどの硬脆材料は,一般的には切削加工が困難とされるが,切削加工での加工実用化に対する要望は大きい.これらの要望に応えるため本研究では,ガラス材料に対し,超音波援用切削法を適用したφ0.3mmのドリル加工を行い,工具接触直後の工具振れ回り軌道および切削抵抗に関して …

    Journal of the Japan Society for Abrasive Technology 61(11), 594-599, 2017

    J-STAGE 

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