Development of a New Ultra-precision Finishing Process for Internal Surface by the Application of Magnetic Abrasive Machining Using Superconducting Coil

超导线圈磁力研磨加工内表面超精密精加工新工艺的开发

• 批准号: 06555032
• 负责人: SHINMURA Takeo
• 金额: $ 8.13万
• 依托单位: Utsunomiya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06555032/
• 关键词: Magnetic abrasive machining; Internal finishing; Generation of nano-meter surface; Superconducting coil; High intensity magnetic field; Magnetic fluid; Ultra-micro abrasive

The results obtained in this research during three years are summarized as follows :(1) High magnetic field strength of 3T (30000 Gs) in the working zone are first realized in our laboratory using freezing type superconducting electro-magnetic coil. (2) The internal finishing setup for non-ferromagnetic slender tubes (slender clean pipes of SUS304) was equipped on this supercoducting coil apparatus. (3) The mechanism of the internal ultra-precision finishing of a tube is discussed by the experimental results using mixed type magnetic fluid with ultra-micro abrasive grains and iron particles respectively. (4) From the experiments, it is clarified that the finishing pressur is infulenced by the both magnetic abrasive particle diameter (iron particle dia.) and the product value of the magnetic field strength and its gradient determined by N-S magnetic pole arrangemet. (5) The effect of magnetic field distribution on the finishing pressure by the modelling experimental setup using a conventional DC electromagnetic coil and rare earth permanent magnets. (6) The analytic results of the magnetic field distribution in the working zone by the Finite Element Method (FEM analysis) using a personal computer are equal to the measued value obtained using a tesla-meter sensor. (7) The difference between the magnetic field distribution of N-S pole arrangement and N-N (or S-S) pole arrangement is discussed by the FEM analysis. (8) The effects of N-N pole arrangement on the finishing characteristics are clarified experimentally, compared with N-S pole arrangement. (9) By this research using superconducting coil, very high magnetic field strength of 3T was actualy obtained in the research field of precision machining technology.

(1)本实验室首次采用冻结型超导电磁线圈实现了工作区3T(30000 Gs)的高磁场强度。(2)在该超导线圈装置上安装了非铁磁性细长管(SUS304的细长清洁管)的内部精加工装置。(3)利用分别含有超微磨料和铁粉的混合型磁性流体的实验结果，探讨了管子内部超精密光整加工的机理。(4)通过实验，明确了磁性磨粒直径(铁粉直径)对研磨压力的影响。以及由N-S磁极排列确定的磁场强度及其梯度的乘积值。(5)利用常规直流电磁线圈和稀土永磁体的模拟实验装置，研究了磁场分布对光整压力的影响。(6)用有限元方法(有限元分析)对工作区磁场分布的分析结果与特斯拉传感器的实测值相当。(7)通过有限元分析，讨论了N-S极排列和N-N(或S-S)极排列的磁场分布的差异。(8)通过实验阐明了N-N极布置对光整加工性能的影响，并与N-S极布置进行了比较。(9)通过超导线圈的研究，在精密加工技术研究领域中，实际获得了很高的3T磁场强度。

项目成果

進村武男: "磁気研磨法に関する一考察-磁性砥粒に作用する磁力とその役割" 1995年度精密工学会春季大会学術講演会講演論文集. 478-479 (1995)

Takeo Shinmura：“磁性抛光方法的研究-作用于磁性磨粒的磁力及其作用”1995年日本精密工程学会春季会议学术会议论文集478-479（1995）。

T.Shinmura, et al.: "Study of Internal Magnetic Abrasive Finishing-Effects of Magnetic Field on Finishing Characteristics" Preprint at the Meeting of the Japan Society of Grinding Engineers. [in Japanese]. 122-123 (1996)

T.Shinmura 等人：日本磨削工程师协会会议上的“内磁磨料精加工研究 - 磁场对精加工特性的影响”预印本。

進村武男: "磁気研磨法による内面の平滑加工に関する研究-スラリー循環方式研磨法の提案と研磨特性" 1997年度精密工学会春季大会学術講演会講演論文集. 2 (1997)

新村武雄：《磁力抛光法内部平滑化的研究——浆料循环抛光法的提案及抛光特性》1997年精密工程学会春季会议学术会议论文集2（1997年）。

T.Shinmura, et al.: "Study of a Cylindrical Magnetic Abrasive Finishing-Behaviors of Magnetic Abrasives and Generation Mechanism of Finishing Pressure" Journal of the Japan Society for Precision Engineering. [in Japanese]. 258-259 (1996)

T.Shinmura等人：“圆柱磁力磨料精加工的研究——磁力磨料的行为和精加工压力的产生机制”日本精密工程学会杂志。

T.Shinmura, et al.: "A New Precision Surface Finishing of Silicon Nitride Fine Ceramics by the Applicaiton of Magnetic Abrasive Finishing" Journal of the Japan Society of Grinding Engineers. Vol.40, No.5 [in Japanese]. 229-235 (1996)

T.Shinmura 等人：“通过应用磁力研磨精加工对氮化硅精细陶瓷进行新的精密表面精加工”，日本磨削工程师学会杂志。