Newly Optical Measurement Method for Internal Form of Taper Sockets of Machine Tool

• Project/Area Number: 18K03883
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18020:Manufacturing and production engineering-related
• Research Institution: Hosei University
• Principal Investigator: YOSHIDA Ichiro 法政大学, 理工学部, 教授 (80409466)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 主軸テーパ穴内面 / 摩耗の定量測定 / 画像認識 / 画像処理 / 光学的計測法 / 塗料 / 膜厚 / 白色干渉 / 縞解析 / 工作機械 / 主軸テーパ穴 / 内面 / 光学計測 / 画像計測

Outline of Final Research Achievements

In this grant project, the following contributions were achieved as a result of the study of image processing and recognition algorithm, and an optical system for measurement, aiming to develop a measurement principle that measure the wear depth of the female taper surface of machine tool. (1) An optical measurement principle and an image analysis algorithm were developed to measure the wear depth. (2) The reliability of the developed prototype optical system and image processing and recognition algorithm were tested and verified, it was confirmed that the repeatability and reproducibility of measured values are on the order of micrometer to submicrometer.

Academic Significance and Societal Importance of the Research Achievements

昨今の生産現場では効率化・自動化が強く求められており，工作機械のメンテナンス技術や計測技術も自動化・半自動化している．しかし，工作機械と，機械加工の命である工具とを連結する主軸テーパ穴の内面の幾何形状の検査や修正研削などのメンテナンスは，旧態依然として光明丹を使った職人技とも言うべき官能検査的な方法が主流である．そこで，本研究では，湾曲した内面の摩耗深さを計測する原理を検討し，マイクロメートルからサブマイクロメートルオーダの精度を達成できることが確認された．この原理を応用した計測装置の研究開発により摩耗深さの数値管理化が期待され，官能検査の脱却とIoT化の促進が期待される．

Research Products

• [Journal Article] Study on wear amount measurement method using paint for maintenance of female taper surface of machine tool（in press, accepted） (2021)
  • Author(s): Dan Nakaya, Ichiro Yoshida
  • Journal Title: Transactions on GIGAKU Volume: 8
  • Peer Reviewed / Open Access
• [Presentation] 工作機械の主軸テーパ穴内面の摩耗量測定における塗料の膜厚差を用いた定量計測法の研究 (2021)
  • Author(s): 中谷 暖，近藤 雄基，吉田 一朗
  • Organizer: 第10回超異分野学会
• [Presentation] Study on wear amount measurement method using paint for maintenance of female taper surface of machine tool (2020)
  • Author(s): Dan Nakaya, Ichiro Yoshida
  • Organizer: The 5th International Conference on “Science of Technology Innovation” 2020
  • Int'l Joint Research
• [Presentation] Evaluation of measurement accuracy of 3D optical coordinate measuring systems for surface color of target object (2020)
  • Author(s): Shun Yokota, Ichiro Yoshida, Makoto Abe
  • Organizer: The 5th International Conference on “Science of Technology Innovation” 2020
  • Int'l Joint Research
• [Presentation] Development of Parabolic Hough Transform for Omnidirectional Cameras (2020)
  • Author(s): Kaori Yashiki, Ryo Sakakibara, Dan Nakaya, Ichiro Yoshida
  • Organizer: The 5th International Conference on “Science of Technology Innovation” 2020
  • Int'l Joint Research
• [Presentation] Feasibility study of wear measurement method by interference fringe analysis for female taper surface of machine tool (2019)
  • Author(s): Dan Nakaya, Ichiro Yoshida
  • Organizer: The 4th International Conference on Science of Technology Innovation 2019
  • Int'l Joint Research
• [Presentation] 工作機械の主軸テーパ穴内面の摩耗を定量測定可能とする新たな光学的計測法の研究 (2019)
  • Author(s): 吉田 一朗，中谷 暖，近藤 雄基
  • Organizer: 第8回 超異分野学会 本大会