Research on Real-time Monitoring System for Bearing Rings Grinding
Grinding is a critical procedure in the machining process,and enhancing its efficacy and safety is a crucial con-cern that requires attention.To solve this problem,a real-time monitoring system based on STM32 was designed for the external grinding process of bearing rings,which mainly consisted of STM32 main controller,data acquisition module,power supply module,interface display module and data storage module.The monitoring system implemented real-time acquisition of acoustic e-mission signals through the ADC module of the STM32 control chip,calculated the root mean square(RMS)value of the acoustic emission signals,determined whether there was contact or not based on the difference between the RMS values before and after contact between the grinding wheel and the workpiece during the grinding process,and was feeded back to the numerical control system to implement the elimination idle process and collision prevention functions.The test results indicate that the system's judgement is accurate and has a response speed of 3 ms.This can reduce the grinding processing time by 1～1.5 s,making it highly valuable for applications.
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