Study on the Geometry Measurement of Bevel Gear and Its Mold on a Gear Coordinate Measuring Machine

• Main Authors: Li, Wenjung, 李文榮
• Other Authors: Feng, Zanhua
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/31907423019429251816

碩士 === 國立中正大學 === 機械工程學系暨研究所 === 100 === Methods for coordinate measuring bevel gear and its mold are studied in this research. First, the mathematical model of the coordinate measuring machine is established and the shortest paths of measuring bevel gear and its mold are planned. Then, the 3D model of the workpiece is imported into the virtual coordinate measuring system in STL format. The STL file of the workpiece is segmented into different arrays with the database partition processing method to increase the speed of simulation. The measured data points are obtained by the better collision rules between the probe head and the tooth profile. Therefore, the simulation program is able to evaluate the possibility of path planning before actual operation. The simulation program is also used to study the compensation method for measuring machine and fixture errors. Finally, the path planning is performed on the real coordinate measuring machine to verify the tooth surface measurement planning. Machining deviations are accumulated in the bevel gear mold manufacturing process. These corrections can be obtained by analyzing the differences between the measurements of mold and molded gear with Ease-off method. The research can be applied to manufacture high precision molded gear. Study on measuring unknown gears without theoretical measuring data are included in this research, too. The flank coordinates can be obtained by minimizing the topographic error between fitting surface and unknown flank. It also can be applied in measuring gear mold and other kinds of gear without theoretical measuring data.