| Summary: | 碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 103 === Due to the need of new type development and fast change in automobile industry, the manufacturer must focus on the different vehicle types and components. Therefore, to reduce the lead time and development cost is important. “Wind deflector” belongs to automotive peripheral products whose edge grinding process is studied. The edge grinding process is divided into three steps by manual operation which will lead to unstable quality and time consuming. Therefore, the development of an automated edge grinding system is important.
For current study, a five-axis robot arm, CAD/CAM software, virtual robot development environment were used to develop an automated acrylic edge grinding system. The grinding path was obtained by teaching module of robot arm where the edge curve’s points data of the wind deflector in the world coordinate were measured. The data was converted to NC code in work coordinate by CAM software, then machining path was simulated and system alarm was checked through virtual robot environment. The deviation of grinding path obtained by CAM software and teaching module was analyzed, and the grinding surface quality by up and down grinding were also measured. The best grinding process conditions for minimizing surface roughness were found by Taguchi quality engineering.
The results of this study are as follows: the overall deviation of grinding paths between CAM software and teaching module can be controlled within 2μm; high grinding temperature which may affect the surface quality can be reduced by using wet grinding technology; the factor contributions of spindle speed, feed rate, abrasive size and depth of cut are 7.811%, 0.519%, 77.519% and 14.150%, respectively; the optimization grinding process conditions are spindle speed: 18000RPM, feed rate: 1500mm/min, abrasive grain size: #240 and depth of cut: 0.2mm; we used form tool with three steps incremental cutting where the surface quality results are better than grinding.
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