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Jianzhong Huang,Jiu-Hua Xu,Ning Qian 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.2
Loading capacity and drive stability could be improved by a high contact ratio tooth profile, which is important to a harmonic drive. A novel mid-point meshing method is proposed to achieve the high contact ratio harmonic two-dimensional curve tooth profile. According to the kinematic relationship between points on the neutral layer coordinate of the flex-spline and corresponding points on the pitch circle coordinate of the circular spline, a new meshing point is generated by taking the middle point of the two meshing points. Then, mathematical proof and kinematic simulation analysis are conducted. The curve has characteristics of a high contact ratio and continuous meshing, and zero backlashes in theory. The main factors affecting the curve are also analyzed. Finally, a tooth profile is designed, and two-dimensional meshing performance is analyzed. Results show that the curve contact ratio is 65.54, and backlash values remain at 5×10 -3 μm.
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Lu Yang,Chih-Hsing Chu,Yu-Can Fu,Jiu-Hua Xu,Yong-Tao Liu 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
This paper primarily reviews the general condition of research on and applications of high speed and ultra-high speed grinding technology. Both technical requirements for grinding wheels used for high speed and ultra-high speed grinding, and existing problems with the current processes are pointed out. Specific to these problems, the discussion regarding high-performance lightweight grinding wheels with a carbon fiber reinforced plastic (CFRP) substrate focuses on three aspects, i.e., design and manufacture, experimental grinding research, and practical industrial applications. Based on the summary of existing research and the application status of the CFRP grinding wheel, existing deficiencies are qualitatively discussed. Focusing on the development of a lightweight CFRP grinding wheel for high speed and ultra-high speed grinding at the end of the paper, some key technical problems with CFRP substrate grinding wheels, such as controlled performance, controlled shape, and the grinding mechanism, are identified, along with further research strategies to resolve them.
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