Development of multi-pole magnet fabrication technique for micro-motor using Stereolithography

本文的研究成果概括如下：(1)基于光固化的多极磁体制造技术研究了光固化磁体制造的技术任务之一--磁体精度的提高问题。表面测量技术就是在这种方法的基础上发展起来的，目的是为了改进设备本身。建立了一套基于质量工程的工艺条件体系。针对面向制造的设计评价问题，提出了从CAD数据中提取形状特征，并基于形状特征评价制造简易性的方法。在此基础上，研制了基于光刻机的磁体生产实验装置。针对一种型材问题，进行了材料配比问题的基础实验，获得了若干信息。(2)多极微电机磁体的评价A…对基于光固化成型技术的多极微型磁体的成型技术进行了进一步的S基础评价，研究了材料混合比对磁体承受载荷和剩余磁通密度的影响。剩余磁通密度变高，从而磁体混合比变高，但耐受负载变低。此外，添加适中的表面活性剂有助于提高残余磁通密度。对各向异性磁性粉末的选择性磁取向进行了分析，提出了一种固定化技术。通过基于光刻技术的多极磁体制造，在选择合适的磁体结构时，可以在较少的磁化磁轭下有效地实现多极磁体的磁化。(3)基于光刻技术的多极微磁体微电机性能评价为了实现基于光刻技术的多自由度步进电机，设计了球形转子，并对该转子旋转所需的驱动系统进行了分析。通过基于积分单元法的扭矩分析，找出了电机旋转所需的线圈和驱动系统的布置方式。较少

The result obtained from this research is summarized below.(1)Multi-pole magnet production technology based on StereolithographyThe improvement problem in accuracy which is one of the technological tasks of the magnet production by Stereolithography was carried out. Surface measurement technology was developed about the approach aiming at improvement of equipment itself. A setup of the processing conditions based on quality engineering was developed. To the problem of evaluation of design for manufacture, approach which extracts the shape feature from CAD data and evaluates fabricating easiness based on the information was carried out. Moreover, the experimental device for enabling the magnet production experiment based on Stereolithography was developed. To the problem of a molding compound, the basic experiment was carried out about the problem of the rate of a compounding ratio of material, and several information was acquired.(2)Evaluation of the magnet for multi-pole micro motorsA … More s fundamental evaluation of the molding technique of a multi-pole tiny magnet based on Stereolithography, the influence on the withstand load and the residual magnetic flux density to a material mixture rate was investigated. A residual magnetic flux density becomes high so that a magnetic body mixing ratio becomes high, but withstand load becomes low. Moreover, it turned out that addition of a moderate surfactant contributes to improvement in a residual magnetic flux density. Analysis of the selective magnetic orientation of anisotropy magnetism powder and an immobilization technology was carried out. By multi-pole magnet fabrication based on Stereolithography, when making it suitable magnet structure, it was shown that magnetization of a multi-pole magnet can be efficiently performed satisfactory in few magnetization yokes.(3)Evaluation of the micro motor using the multi-pole micro magnet based on StereolithographyIn order to realize the multi-degree-of-freedom stepping motor based on Stereolithography, the globular rotor was devised and analysis about a drive system required for rotation of this rotor was carried out. By carrying out torque analysis based on integral element method, arrangement of a coil required for rotation of a motor and a drive system were found out. Less