Analysis and Simulation of the Built-in Type High Speed Spindle in Machine Tool

• Main Authors: Feng-Hsiang Chen, 陳楓翔
• Other Authors: 邱顯俊
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5311050%22.&searchmode=basic

碩士 === 國立中興大學 === 機械工程學系所 === 107 === Taiwan''s machine tool industry has become more and more developed in recent years, but the development of machine tools relies on the rule of thumb to test and improve the already built machine tools, which is not only costly but also time consuming. Now, with the advancement of technology, we can do more computer software analysis before the machine tool is manufactured, understand the state and situation of the machine tool, and improve the structure. This article discusses built-in high-speed spindles. The internal structure of the built-in type high-speed spindle is complex, so this article focuses on the whole spindle, and performs the Experimental Modal Analysis (EMA) from the tie rod, mandrel, structural parts, etc., and compares the natural frequencies and modes with the model which used Finite Element Method(FEM) constructed, and corrects material parameters and joint stiffness. The error of single part of the spindle and the whole spindle finite element digital model is between 2~4%. Then the final high-speed spindle finite element digital model is constructed. In our work, vibration simulation analysis for finite digital model in different rotated speeds are compared with actual test values. In addition, the influences of the adjustment in different parameters are also demonstrated, including the drawbar force, bearing preload, bearing damping and disc spring damping for improving the spindle rotation speed and the precision of machining. And provide reference to future designers.