HAGIWARA Masaya

写真a

Affiliation Department

Department of Electrical and Mechanical Engineering
Department of Electrical and Mechanical Engineering

Title

Professor(Moving Out or Retirement)

Contact information

Contact information

Degree

  • Doctor of Engineering ( 1985.12   Tokyo Institute of Technology )

  • Master of Engineering ( 1980.03   Tokyo Institute of Technology )

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Design engineering

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Machine elements and tribology

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Manufacturing and production engineering

From School

  • Tokyo Institute of Technology   Faculty of Engineering   Department of Mechanical Science Engineering   Graduated

    - 1978.03

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    Country:Japan

From Graduate School

  • Tokyo Institute of Technology   Graduate School, Division of Integrated Science and Engineering   Master's Course   Completed

    1978.04 - 1980.03

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    Country:Japan

External Career

  • Tokyo Institute of Technology   Research Assistant

    1980.04 - 1987.05

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    Country:Japan

Professional Memberships

  • ASTM International

    2005.01

  • Japan Printing Machinery Manufacturers Association

    1999.04 - 2001.03

  • Japanese Institute for Plant Maintenance

    1995.04 - 1999.03

  • International Journal of Industrial Engineering, Theory, Applications and Practice

    1994.03

  • 日本設備管理学会

    1989.06

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Research Career

  • Proposal of International Standard for nuts with flange which assure dynamic performance

    Grant-in-Aid for Scientific Research  

    Project Year: 2016.04 - 2018.03

  • Qualitative Estimation for the Fatigue Strangth of a Bolt based on the Residual Stress at the Thread Root

    Grant-in-Aid for Scientific Research  

    Project Year: 2008.04 - 2011.03

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    X-ray maeasurement and FE simulation have been performed to verify the hypothesis concerning the fatigue strength of a bolt thread root based on the residual stress.

  • On the Effect of Manufacturing Method of Bolts on their Mechanical Properties

    Contract Research  

    Project Year: 2007.04 - 2009.03

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    The hypothesis was proposed and verified in which the effect of the manufacturing process of bolts can be taken into accout.

  • On the Effect of the Residual Stress at the Thread Root on its Mechanical Properties

    Funded Research  

    Project Year: 2004.04 - 2010.03

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    The thread-shaped gauge with nozzles was developed for the thread pitch measurement for nuts by using air micrometer.

  • Development of Tightening Performance Testing Machine for Threaded Fasteners

    Grant-in-Aid for Scientific Research  

    Project Year: 2001.04 - 2003.03

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    The testing device was made using piezoelectric sensors, and the error causes and the methods to exclude them were clarified.

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Papers

  • Effect of bending moment on the fatigue strength of a bolt in bolt/nut assembly Reviewed

    Masaya HAGIWARA, Ryota SUZUKI and Yutaka INAGAKI

    Journal of Advanced Mechanical Design, Systems, and Manufacturing   14 ( 3 )   1 - 10   2020.03

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:日本機械学会  

    This study describes an approach to quantify the effect of the bending moment on the fatigue strength of a bolt
    in bolt/nut assembly. To confirm the validity of the conventional fatigue design methodology based on the
    nominal stress acting on the specified nominal stress area, both the fatigue tests with various bending stress
    ratios (nominal bending stress/ nominal total axial stress) and the 3D-FE stress analysis for the corresponding
    conditions were conducted. The results from fatigue tests using a newly developed fatigue testing fixture
    clearly show as bending stress ratio increases, the (virtual) fatigue strength expressed by the nominal stress
    also increases. The results from 3D-FE analysis show that the magnitude of the local bending stress on the
    thread root is lower than the one estimated from nominal axial stress and the stress concentration factor for
    purely tensile loading. The results, however, also show that the magnitude of the local stress acting on the bolt
    thread root is affected by the angular position of nut against the loading axis due to the existence of the
    incomplete thread of nut at the bearing face side. Finally, it is concluded that the conventional fatigue design
    methodology is practically acceptable for tensile force combined with bending moment loading, albeit with
    results that are slightly conservative.

    DOI: 10.1299/jamdsm.2019jamdsm000x

  • Development of a solid bolt/nut model utilized in 3D-FE structural analysis for bolted joints Reviewed

    Masaya HAGIWARA, Tomohiro KAWAMURA

    Journal of Advanced Mechanical Design, Systems, and Manufacturing   12 ( 1 )   jamdsm0001   2018.01

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:日本機械学会  

    A solid bolt/nut model utilized in 3D-FE analysis is developed, which can save the numbers of elements drastically without downgrading the accuracy of stress anlysis.

    DOI: 10.1299/jamdsm.2018jamdsm0001

    Other Link: https://www.jstage.jst.go.jp/browse/jamdsm/12/0/_contents/-char/en

  • 転造加工によりねじ谷底に発生する残留応力の推定(3次元FEM解析による転造加工シミュレーション) Invited Reviewed

    古川 朗洋,萩原 正弥

    日本ねじ研究協会誌   47 ( 3 )   65 - 72   2016.03

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:日本ねじ研究協会  

    3次元FEMにより,転造加工によってボルトねじ谷底に発生する残留応力分布の推定を行い,その値と吉本の仮説を利用すると,熱処理後転造ボルトの疲労試験結果が正確に推定できることを明らかにした。

  • Estimation of the residual stress on the thread root generated by thread rolling process Reviewed

    Akihiro FURUKAWA, Masaya HAGIWARA

    Mechanical Engineering Journal   2 ( 4 )   14-00293   2015.08

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    Language:English   Publishing type:Research paper (scientific journal)  

    ねじの疲労強度に関する仮説検証の一環として,ねじ転造によってねじ谷底に発生する残留応力分布を3次元FE解析で求め,同一材料で作成した環状丸溝試験片の解析及びX線応力測定結果,並びに熱処理後転造ボルト及び転造後熱処理ボルトの疲労試験結果をもとに,その妥当性について検証をおこなった。

    DOI: 10.1299/mej.14-00293

    Other Link: https://www.jstage.jst.go.jp/article/mej/2/4/2_14-00293/_article

  • Fatigue Strength of a Bolt in Bolt/Double Nuts Assemblies (Effect of Locking Force and Nut Height) Reviewed

    Masaya HAGIWARA, Akihiro FURUKAWA, Yasuhiro KATO, Nobuyuki SHINOHARA, Kazuya ISHIDA and Masashi YAMADA

    Transactions of JSME (series C)   79 ( 800 )   1189 - 1195   2013.04

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    Other Link: https://www.jstage.jst.go.jp/browse/kikaic/79/800/_contents/-char/ja/

  • Hierarchical Fault Classification Method as a Tool for Analyzing Complex Failures: Application to the Nuclear Power Plant Accidents Reviewed

    Masaya HAGIWARA

    Proceedings of the 1st Annual World Conference of the Society for Industrial and Systems Engineering   117 - 122   2012.09

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    階層的故障分類の原理を応用し,複合故障や事故の原因及び影響評価を簡易に行うための方法を提案し,スリーマイル島及び福島第一原子力発電所事故への適用を行っている。

  • Effect of the Residual Stress on the Fatigue Strength of a Bolt in Bolt/Nut Assemblies (Verification of the hypotheses using an axi-symmetric bolt model) Reviewed

    Akihiro FURUKAWA, Kazunari KAMIYA and Masaya HAGIWARA

    Journal of Advanced Mechanical Design, Systems, and Manufacturing   6 ( 1 )   189 - 197   2012.01

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    Language:English   Publishing type:Research paper (scientific journal)  

    ねじ谷底の残留応力がボルトの疲労強度に及ぼす影響を明らかにするため、リードのないボルトに予荷重を作用させることによってねじ谷底に解析可能な模擬的残留応力を与え、ボルトねじ谷底の局所的応力変動と疲労強度の関係から、ボルトの疲労強度に関する仮説の検証を行った。

    DOI: 10.1299/jamdsm.6.189

    Other Link: http://www.jstage.jst.go.jp/article/jamdsm/6/1/189/_pdf/-char/ja/

  • 階層的故障分類法による設備保全情報の共有化 -事故や故障の防止を目的とした設備の評価と改善の方策- Invited

    萩原正弥

    経営工学の新たなる挑戦(名古屋工業大学経営工学50周年記念論文集)、三恵社   1 - 6   2011.10

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (other academic)  

    階層的故障分類法の原理に基づき故障を分類し、事故や故障による被害を最小化するために必要な保全方式を客観的に評価し、改善策を提示するための手法を提案している。

  • FE Model for the Simulation of the Residual Stress Induced by the Thread Rolling Process Invited Reviewed

    Akihiro FURUKAWA, Masaya HAGIWARA

    Journal of the Japan Research Institute for Screw Threads and Fasteners (JFRI)   40 ( 12 )   343 - 348   2009.12

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Development of a New Testing Machine for Torque/Clamp Force Testing for Threaded Fasteners in Accordance with ISO 16047 -Characteristics of a Load/Torque Cell System using Piezoelectric Force Sensors Reviewed

    Masaya HAGIWARA, Yuki MANO, Masahiko HAMADA, Kazunori NUNOGAMI, Hiro OZEKI, Shinya ITO

    Journal of Advanced Mechanical Design, Systems, and Manufacturing   3 ( 4 )   324 - 332   2009.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/jamdsm.3.324

    Other Link: https://www.jstage.jst.go.jp/article/jamdsm/3/4/3_4_324/_pdf

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Books and Other Publications

  • VDI 2230 Systematic calculation of highly stressed bolted joints

    ( Role: Joint translator)

    The Japan Research Institute for Screw Threads and Fasteners  2018.10  ( ISBN:978-4-9902019-3-7

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    Total pages:203   Language:jpn   Book type:Scholarly book

  • Elucidation and Control of Tribology by Numerical Simulation and Surface Analysis

    ( Role: Contributor)

    2018.03  ( ISBN:978-4-924728-80-6

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    Total pages:1192   Responsible for pages:681-688   Language:jpn   Book type:Scholarly book

  • Resources Utilization and Productivity Enhancement Case Studies

    Anil Mital, Arun Pennathur, Masaya Hagiwara, et. al.( Role: Contributor ,  Chapter 3: Standardization of Technical Data Utilized For Maintenance Activities)

    Momentum Press  2015.03  ( ISBN:9781606506790

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    Language:eng   Book type:Scholarly book

    第3章において,設備保全情報獲得のための方法論及びデータベース構造について解説。

  • Industrial Resource Utilization and Productivity

    Shihab Asfour and Moataz Eltoukhy, Anoop Desai and Anil Mital, Masaya Hagiwara et.al.( Role: Contributor ,  Chapter 11. Maintenance Data Management: Acquiring and Creating Knowledge for Maintence Activities)

    Momentum Press  2010.07  ( ISBN:978-1-60650-130-6

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    Language:eng   Book type:Scholarly book

    生産システムにおける設備保全情報(故障情報)を体系的に管理するための新しいしくみ(階層的故障分類法)について説明し,保全方式の適切な選択を可能とする情報管理データベースに対する考察を行っている。

  • ねじ研究十年の成果 -第4編-

    大橋 宣俊,根本 俊雄,賀勢 晋司,萩原 正弥,大磯 義和 他( Role: Contributor)

    日本ねじ研究協会  2009.11 

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    Total pages:202   Responsible for pages:91-97   Language:jpn   Book type:Report

  • 最新 機械機器要素技術

    -( Role: Joint author)

    NGT  2008.04  ( ISBN:9784990371319

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    Language:jpn  

  • Mechnical Engineers' Handbook, β5 Measurement Engineering

    ( Role: Joint author)

    The Japan Society of Mechanical Engineers  2007.12  ( ISBN:9784888981613

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    Language:jpn  

  • Guide to Fastening Technology of Bolted Joints

    ( Role: Joint author)

    The Japan Research Institute for Screw Threads and Fasteners  2004.04  ( ISBN:4-9902019-0-6

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    Language:jpn  

  • Industrial Engineering Applications and Practice: User's Encyclopedia

    ( Role: Joint author)

    International Journal of Industrial Engineering  1999.07  ( ISBN:0-9654599-0-X

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    Language:jpn  

  • 生産管理ハンドブック

    -( Role: Joint author)

    日刊工業新聞社  1999.03  ( ISBN:4-526-04355-9

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    Language:jpn  

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Misc

  • ISO/TC 2関係東京会議開催について Invited

    萩原 正弥

    Fastening Journal & Network   ( 2496 )   2 - 2   2020.01

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)   Publisher:㈱ファスニングジャーナル  

  • ねじ及びねじ締結の基礎(7)-ねじ締結のトラブル防止対策- Invited

    萩原 正弥

    57 ( 12 )   1 - 7   2019.12

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Publisher:(一社)日本クレーン協会  

  • ねじ及びねじ締結の基礎(6)-ねじの締付け管理- Invited

    萩原 正弥

    57 ( 10 )   7 - 13   2019.10

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Publisher:(一社)日本クレーン協会  

  • ねじ及びねじ締結の基礎(5)-ねじ締結体設計の手順と方法- Invited

    萩原 正弥

    57 ( 7 )   7 - 14   2019.07

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Publisher:(一社)日本クレーン協会  

  • ISO/TC 2国際標準化10年の歩み -2009年から2018年(その2)- Invited

    萩原 正弥

    50 ( 6 )   162 - 171   2019.06

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:日本ねじ研究協会  

  • ISO/TC 2国際標準化10年の歩み -2009年から2018年(その1)-

    萩原 正弥

    50 ( 5 )   133 - 138   2019.05

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:日本ねじ研究協会  

  • Fundamentals of threaded fasteners and their selection Invited

    Masaya HAGIWARA

    Hydraulics & Pneumatics   58 ( 5 )   14 - 19   2019.05

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

  • ねじ及びねじ締結の基礎(4)-ねじ締結体における負荷の求め方- Invited

    萩原 正弥

    57 ( 4 )   4 - 11   2019.04

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Publisher:(一社)日本クレーン協会  

  • ねじ及ねじ締結の基礎(3)-ボルトの疲労強度特性- Invited

    萩原正弥

    56 ( 12 )   未定   2018.12

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Publisher:(一社)日本クレーン協会  

    ボルト・ナット結合の疲労強度特性,影響因子及び試験方法について解説。

  • ねじ及びねじ締結の基礎(2)-ボルト・ナット結合の静的強度特性- Invited

    萩原正弥

    56 ( 8 )   6 - 15   2018.08

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Publisher:(一社)日本クレーン協会  

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Presentations

  • ボルト・ナット結合におけるナット膨張変形 (単純引張負荷 及び締付け負荷の場合の比較)

    森本 宏樹,萩原 正弥

    日本機械学会2020年次大会  日本機械学会

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    Event date: 2020.09

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学(Web開催)  

  • 軸方向引張外力を受けるボルト・ナット結合におけるナット の膨張変形(ナットの形状による影響)

    安田 将太郎,萩原 正弥

    日本機械学会2020年次大会  日本機械学会

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    Event date: 2020.09

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学(Web開催)  

  • 小形二面幅をもつスタイル1超軽量フランジ付き六角ナット の締付け特性

    古川 朗洋,萩原 正弥

    日本機械学会2020年次大会  日本機械学会

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    Event date: 2020.09

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学(Web開催)  

  • 繰返し引張外力によるねじのゆるみ(摩擦特性が接触面のす べり挙動に及ぼす影響)

    佐々 誠一,萩 原 正弥

    日本機械学会2020年次大会  日本機械学会

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    Event date: 2020.09

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学(Web開催)  

  • Self-loosening of Bolt/Nut Assembly under Repeated Tensile Force (Simulation of Torshional Behavior of Bolt Using Simple FE Model)

    Seiichi SASSA and Masaya HAGIWARA

    Mechanical Engineering Congress, 2019 JAPAN  The Japan Society for Mechanical Engineers

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    Event date: 2019.09

    Language:Japanese   Presentation type:Oral presentation (general)  

  • Loadability of Hexagon Socket Countersunk Head Screws (Effect of Shear Strength Ratio of Material)

    Yuto TAKEUCHI and Masaya HAGIWARA

    Mechanical Engineering Congress, 2019 JAPAN  The Japan Society for Mechanical Engineers

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    Event date: 2019.09

    Language:Japanese   Presentation type:Poster presentation  

  • Development of Light Weight Hexagon Style 1 Nuts with Flange by Reducing Width across Flats and Nut Height

    Akihoro FURUKAWA, Masaya HAGIWARA, Kazuki MORISHITA and Tomohiro OGURA

    Mechanical Engineering Congress, 2019 JAPAN  The Japan Society for Mechanical Engineers

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    Event date: 2019.09

    Language:Japanese   Presentation type:Oral presentation (general)  

  • Effect of Bending Moment on the Fatigue Strength of a Bolt in Bolt/Nut Assembly International conference

    Masaya Hagiwara, Ryota Suzuki and Yutaka Inagaki

    The 8th International Conference on Manufacturing, Machine Design and Tribology  日本機械学会

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    Event date: 2019.04

    Language:English   Presentation type:Oral presentation (general)  

    Venue:SHIROYAMA HOTEL Kagoshima  

    The study treats how to quantify the effect of the bending moment on the fatigue strength of
    a bolt in bolt/nut assemblies. The results from fatigue tests with various bending stress ratio (nominal
    bending stress/nominal stress) using newly developed testing jigs clearly show that the higher the
    bending stress ratio, the higher the (virtual) fatigue strength expressed by the nominal stress based on
    the circular stress area As. The results from FE analysis suggest that the magnitude of the local bending
    stress on the thread root is lower than the one estimated from nominal bending stress and the fatigue
    notch factor for purely tensile loading.

  • Loadability of Hexagon Socket Countersunk Head Screws International conference

    Yuto TAKEUCHI and Masaya HAGIWARA

    The 8th International Conference on Manufacturing, Machine Design and Tribology  日本機械学会

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    Event date: 2019.04

    Language:English   Presentation type:Poster presentation  

    Venue:SHIROYAMA HOTEL Kagoshima  

    For hexagon socket countersunk head screws, a risk of fracture at the head is considered in
    ISO 10642 since the cross sectional area of the head decreases due to the driving socket. This study
    aims to clarify the effect of head geometry on its loadability. It was found from tensile test and FE
    analysis performed for hexagon socket countersunk head screws with various head (and socket)
    configurations that the loadability is much higher than one estimated using Mises stress.

  • 曲げが作用するボルト/ナット結合体の疲労強度(曲げ応力がボルトの疲労強度に及ぼす影響)

    鈴木涼太,萩原正弥

    日本機械学会2018年次大会  日本機械学会

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    Event date: 2018.09

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:関西大学千里山キャンパス  

    ボルトに単純引張り負荷が加わる場合と,曲げモーメント負荷が追加される場合について,実験結果をもとに,公称応力からボルトの疲労強度を推定する際の問題点について考察した。

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Industrial Property Rights

  • ボルトの引張試験方法

    萩原正弥,ほか4名

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    Applicant:㈱青山製作所,㈱東京測器研究所

    Application no:2005-229127  Date applied:2005.08

    Announcement no:2007-046929  Date announced:2007.02

    Patent/Registration no:4685541  Date registered:2011.02  Date issued:2011.02

    Country of applicant:Domestic   Country of acquisition:Domestic

  • 雌ねじの有効径検査装置

    吉本勇,萩原正弥ほか3名

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    Applicant:東京測範株式会社

    Application no:昭63-160426  Date applied:1988.06

    Announcement no:平02-010105  Date announced:1990.01

    Country of applicant:Domestic   Country of acquisition:Domestic

  • 雌ねじのピッチ検査法及び装置

    萩原正弥,小野達弘,吉本勇ほか2名

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    Applicant:東京測範株式会社

    Application no:昭62-210700  Date applied:1987.08

    Announcement no:昭64-54209  Date announced:1989.03

    Patent/Registration no:2048332  Date registered:1995.08  Date issued:1995.08

    Country of applicant:Domestic   Country of acquisition:Domestic

Awards

  • 日本機械学会機素潤滑設計部門一般表彰(優秀講演)

    2015.04   日本機械学会機素潤滑設計部門  

    萩原正弥

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  • 日本機械学会機素潤滑設計部門一般表彰(優秀講演)

    2013.05   日本機械学会機素潤滑設計部門  

    萩原 正弥

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  • 日本機械学会機素潤滑設計部門功績賞

    2012.04   日本機械学会機素潤滑設計部門  

    萩原正弥

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  • JSME Fellow

    2012.01  

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  • 標準事業国際功績賞

    2011.03   日本機械学会  

    萩原正弥

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    Award type:International academic award (Japan or overseas)  Country:Japan

  • 日本ねじ研究協会功績者表彰

    2009.11   日本ねじ研究協会  

    萩原正弥

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    Country:Japan

  • Silver Certificate

    2009.03  

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    Award type:Award from international society, conference, symposium, etc.  Country:United States

  • 日本ねじ研究協会功績者表彰

    1999.02   日本ねじ研究協会  

    萩原正弥

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    Country:Japan

  • Award of the Society of Plant Engineers, Japan

    1996.04  

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    Country:Japan

  • Award of the Japan Society of Mechanical Engineers

    1987.04  

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    Country:Japan

Scientific Research Funds Acquisition Results

  • 16K06043 ねじ結合部の動的強度保証を実現する新しいフランジ付ナットの国際規格提案

    2016.04 - 2019.03

    科学研究費補助金  基盤研究(C)

    萩原 正弥

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    Authorship:Principal investigator 

  • 20560106 ねじ谷底の残留応力に基づくボルトの疲労強度の定量化

    2008.04 - 2011.03

    科学研究費補助金  基盤研究(C)

    萩原 正弥

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    Authorship:Principal investigator 

    材料の疲労強度からボルトの疲労強度を正確に推定するために,ねじ転造によって発生する残留応力の推定,及び残留応力が疲労強度に及ぼす影響の定量化を行った。

  • 13650151 ねじ締結性能診断装置の開発

    2001 - 2003.03

    科学研究費補助金  基盤研究(C)

    萩原 正弥

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    Authorship:Principal investigator 

    ねじ締結における特性値を高精度で測定するための水晶圧電素子を用いた新しいロードセル及びトルクセルの設計・開発を行った。

  • 09450068 ねじ結合部におけるストリッピングに関する研究

    1997 - 1999.03

    科学研究費補助金  基盤研究(B)

    萩原 正弥、武澤 伸浩,大橋 宣俊(湘南工大)

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    Authorship:Principal investigator 

    ねじ山のせん断破壊事故の原因を調べるため,静的及び動的荷重下でのねじ山の強度に及ぼすナット高さなどの影響を実験及び数値解析によって明らかにした。

  • 62750122 空気マイクロメータを応用しためねじ総合精度自動測定機に関する基礎研究

    1987 - 1988.03

    科学研究費補助金  奨励研究

    萩原 正弥

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    Authorship:Principal investigator 

    空気マイクロメータの原理を応用し,めねじのピッチ及び有効径を高精度で自動測定できる測定機開発のため,測定精度の確保及びデータ処理に関する基礎研究を行った。

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Past of Commissioned Research

  • ボルトの座面形状がねじのゆるみ特性に及ぼす影響について

    2014.04 - 2016.09

    (株)メイドー  General Consignment Study 

    萩原 正弥、二村 晃弘

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    Authorship:Principal investigator 

  • Effect of the residual stress at the thread root on the mechanical properties of bolts

    2005.04 - 2010.03

    General Consignment Study 

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    Authorship:Principal investigator 

Past of Cooperative Research

  • 軽量小形フランジ付ナットの国際規格提案

    2018.04 - 2021.03

    日本ねじ研究協会  Collaboration in Japan 

    萩原正弥、来住健,古川朗洋,北井敬人,大橋宣俊

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    二面幅がフランジ付ボルトと等しく,高さを抑えて30%程度の軽量化が可能となる小形フランジ付ナットについて,国際規格として提案するため,静的強度,動的強度及び製作性のそれぞれの観点から評価を行う。

  • ねじの製造法が締結用おねじ部品の強度に及ぼす影響

    2007.04 - 2009.03

    財団法人 豊田理化学研究所  Other 

    萩原 正弥、古川 朗洋,河崎 一紀,神谷 和成

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    Authorship:Principal investigator 

     ねじ転造によって製造されたボルトについて,熱処理と転造の順序によって疲労強度が異なるのが残留応力の影響であることを確認し,ボルトの疲労強度がねじ谷底の局所的応力から推定可能であることを示した。

  • 印刷産業機械のネットワーク基盤整備に関する調査研究

    1999.04 - 2001.03

    社団法人 日本印刷産業機械工業会  Collaboration in Japan 

    三品 博達

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     印刷産業機械に発生する故障や事故を系統的に分類し,DB化することで保全の効率化が可能となるシステムを提案した。

  • ねじ締結部のメンテナンスに関する研究

    1997.04 - 1998.03

    社団法人 日本プラントメンテナンス協会  Collaboration in Japan 

    萩原 正弥

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    Authorship:Principal investigator 

     ねじ締結部に発生する不具合や事故の分類を行い,その防止対策(指針)を提示した。

  • 塑性域ねじ締結に関する標準化のための調査研究

    1983.04 - 1986.04

    通商産業省工業技術院  Collaboration in Japan 

    吉本 勇、大橋 宣俊ほか

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     塑性域ねじ締結された構造体(ねじ締結体)の締付け実験及び締結体の疲労試験を行い,その安全性及び信頼性の検証を行った。

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Committee Memberships

  • 日本ねじ研究協会   JIS B 1124及び1126改正原案作成委員会・委員長  

    2020.08 - 2021.05   

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    Committee type:Academic society

  •   Standardizing committee, Chairperson  

    2019.04   

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    Committee type:Academic society

  • 日本ねじ研究協会   締結用部品の検査文書関係JIS原案作成委員会・委員長  

    2019.04 - 2020.03   

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    Committee type:Academic society

  • The Japan Society of Mechanical Engineering   ICMDT 2019 Steering committee member  

    2018.07   

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    Committee type:Academic society

  • 日本ねじ研究協会   表面処理関係JIS原案作成委員会委員長  

    2018.04   

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    Committee type:Academic society

  • 日本機械学会   機素潤滑設計部門・部門長  

    2017.04 - 2018.03   

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    Committee type:Academic society

  • The Japan Society of Mechanical Engineering   ICMDT 2017 Steering committee member  

    2016.07 - 2017.04   

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    Committee type:Academic society

  • 日本機械学会   機素潤滑設計部門副部門長  

    2016.04 - 2017.03   

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    Committee type:Academic society

  • 日本ねじ研究協会   理事  

    2015.06   

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    Committee type:Academic society

  • 日本ねじ研究協会   ISO/TC 1国内委員会委員長  

    2015.04   

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    Committee type:Academic society

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