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

本研究所得结果总结如下。(1)基于立体光刻技术的多极磁体生产技术研究了立体光刻技术中磁体精度的提高问题。以设备本身的改进为目标，发展了表面测量技术。建立了一套基于质量工程的加工条件体系。针对面向制造的设计评价问题，提出了一种从CAD数据中提取形状特征，并根据信息进行易加工性评价的方法。此外，还研制了实现基于立体光刻的磁体生产实验的实验装置。针对成型材料的配比问题，进行了材料配比率问题的基础实验，获得了一些信息。(2)多极微型电机用磁体的性能评价对基于立体光刻的多极微型磁体的成型工艺进行了基本评价，研究了其承受载荷和残余磁通密度对材料混合率的影响。残余磁通密度变大，使磁体混合比变大，但承受载荷变低。结果表明，加入适量的表面活性剂有助于提高残余磁通密度。对各向异性磁粉的选择性磁取向进行了分析，并提出了一种固定技术。利用立体光刻技术制作多极磁体，在制作合适的磁体结构时，证明了多极磁体在很少的磁化轭下就能有效地完成令人满意的磁化。(3)基于立体光刻的多极微磁体微型电机评价为实现基于立体光刻的多自由度步进电机，设计了球形转子，并对其旋转所需的驱动系统进行了分析。通过基于积分元法的转矩分析，确定了电机和驱动系统旋转所需线圈的布置方式。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