Monitoring system of precision CNC internal grinder for middle and small holes

YU Sheng-xi1， SHA Jie1， XING Kang-lin1， ZHAO Fei1， WU Jian-feng2， CAO Zhi-zhong2
（1. College of Mechanical & Electrical Engineering， Henan University of Technology， Zhengzhou 450001，China；
2. Zhengzhou Second Machine Tool Plant， Zhengzhou 450007， China）

Abstract： Aiming at unstable grinding accuracy and low grinding efficiency in precision grinding process about the holes，power detection technology was applied into grinding process monitoring. Experiment will be studied on the precision CNC internal grinder about holes，through using power sensors，monitoring the power of wheel electric spindle，the internal grinder grinding monitoring system was built. The grinding quality and grinding parameters，grinding efficiency and grinding power were analyzed，to establish the relationships between grinding power and grinding efficiency and grinding quality. The power reference line was used to control the grinding process，and to realize the automatic grinding of knife，collision protection function. With the grinding monitoring system，the grinding experiment was carried out and the grinding power monitoring reference line was obtained．At the same time，grinding process parameters were optimized by using the reference line. The results indicate that grinding monitoring system realizes the grinding state feedback control，improves the grinding precision and automation degree of the grinding process.
Key words： middle and small holes； internal grinder； grinding accuracy； monitoring system； power detection； reference line setting； process parameter optimization