Multi-objective design optimization of both segmented variable blank holder force trajectories and blank shape

• Project/Area Number: 26420076
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Design engineering/Machine functional elements/Tribology
• Research Institution: Kanazawa University
• Principal Investigator: Kitayama Satoshi 金沢大学, 機械工学系, 教授 (90339698)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 最適設計 / 逐次近似最適化 / 機械学習 / 塑性加工 / シミュレーション / 多目的最適化

Outline of Final Research Achievements

Blank holder force (BHF) is one of the important process parameters for successful sheet metal forming. Variable blank holder force (VBHF), that the BHF varies through the forming process, is recognized as an advanced forming technology. It has also been reported that segmented VBHF (S-VBHF) is valid to a complex shape forming, but the optimal S-VBHF trajectories are rarely discussed. In addition to BHF, blank shape has an influence on the product quality. The blank shape minimizing the earing is still an important issue in sheet metal forming. Simultaneous optimization of both segmented VBHF trajectories and blank shape is proposed in this research. Numerical simulation in sheet metal forming is so intensive that a sequential approximate optimization is adopted for the simultaneous design optimization. Based on the numerical result, the experiment using a servo press is carried out. It has been confirmed from the numerical and experimental result that the proposed approach is valid.

Research Products

• [Journal Article] 深絞り加工におけるブランク形状と分割可変ブランクホルダー力の同時最適化 (2017)
  • Author(s): 河本基一郎，宮坂卓嗣，山道顕，野田拓也，北山哲士，小山浩季，山崎光悦
  • Journal Title: 日本機械学会論文集 Volume: 83-845 Pages: 16-00485
  • NAID: 130005303827
  • Peer Reviewed / Open Access
• [Journal Article] Numerical and experimental case study on simultaneous optimization of blank shape and variable blank holder force trajectory in deep drawing (2017)
  • Author(s): Kitayama, S., Koyama, H., Kawamoto, K., Noda, T., Yamamichi, K., Miyasaka, T.
  • Journal Title: Structural and Multidisciplinary Optimization Volume: 55-1 Issue: 1 Pages: 347-359
  • DOI: 10.1007/s00158-016-1484-4
  • Peer Reviewed
• [Journal Article] 機械学習と最適化の融合による薄板成形技術開発 (2016)
  • Author(s): 北山哲士
  • Journal Title: シミュレーション Volume: 35-4 Pages: 228-232
  • Peer Reviewed
• [Journal Article] Numerical investigation and optimization of pulsating and variable blank holder force for identification of formability window for deep drawing of cylindrical cup (2016)
  • Author(s): Kitayama, S., Natsume, S., Yamazaki, K., Han, J., Uchida, H.
  • Journal Title: International Journal of Advanced Manufacturing Technology Volume: 82(1-4) Issue: 1-4 Pages: 583-593
  • DOI: 10.1007/s00170-015-7385-7
  • Peer Reviewed
• [Journal Article] Multi-objective optimization of blank shape for deep drawing with variable blank holder force via sequential approximate optimization (2015)
  • Author(s): Kitayama, S., Saikyo, M., Kawamoto, K., Yamamichi, K.
  • Journal Title: Structural and Multidisciplinary Optimization Volume: 52-5 Issue: 5 Pages: 1001-1012
  • DOI: 10.1007/s00158-015-1293-1
  • Peer Reviewed
• [Presentation] Simultaneous optimization of blank shape and variable blank holder force trajectory in deep drawing (2016)
  • Author(s): Miyasaka, T., Kawamoto, K., Kitayama, S., Koyama, H., Yamamichi, K., Noda, T.
  • Organizer: Asian Congress of Structural and Multidisciplinary Optimization 2016
  • Place of Presentation: 長崎, Brick Hall
  • Year and Date: 2016-05-22
  • Int'l Joint Research
• [Presentation] Sequential Approximate Optimization Using Radial Basis Function and its Application (2015)
  • Author(s): Kitayama, S.
  • Organizer: 3rd International Workshops on Advances in Computational Mechanics
  • Place of Presentation: Tokyo
  • Year and Date: 2015-10-12
  • Invited
• [Presentation] Simultaneous optimization of initial blank shape and blank holder force trajectory for square cup deep drawing using sequential approximate optimization (2015)
  • Author(s): Kitayama, S., Saikyo, M., Kawamoto, K., Yamamichi, K.
  • Organizer: 11th World Congress of Structural and Multidisciplinary Optimization
  • Place of Presentation: Sydney
  • Year and Date: 2015-06-07
  • Int'l Joint Research
• [Presentation] 角筒深絞り加工を対象とした初期ブランク形状と可変ブランクホルダー力の同時最適化 (2014)
  • Author(s): 斎京真里奈・北山哲士
  • Organizer: 日本機械学会 第11回最適化シンポジウム2014（
  • Place of Presentation: 金沢
  • Year and Date: 2014-12-12 – 2014-12-13
• [Book] 人工知能・機械学習・ディープラーニング関連技術とその活用 (2016)
  • Author(s): 北山哲士他37名
  • Total Pages: 296
  • Publisher: 情報機構