Grinding state detecting and controlling method and device based on sound emission

Abstract

The invention relates to a grinding state detecting and controlling method and device based on sound emission. Characteristic parameters of different filtering frequency bands are calculated in the learning stage, and the optimal filtering frequency band required in the working stage is obtained; the stored characteristic parameters in the working stage and the learning stage are compared in real time; the grinding state is accurately judged; a state feedback signal is output to a numerical control system, and a grinding wheel or a workpiece adopts segmented grinding and successive completion during grinding, that is, the numerical control system controls the grinding wheel to perform repeated feed and retract when machining of the single workpiece is completed; fast feed is adopted in the idle stroke stage, and slow feed is adopted in the grinding stage, so that the idle stroke time is shortened and the purpose of removing idle stroke is achieved; meanwhile, the abnormal conditions are detected during grinding are detected so as to prevent equipment damage and achieve the purpose of preventing collision. By means of the grinding state detecting and controlling method and device based on sound emission, on-line monitoring of removing idle stroke and preventing collision is achieved, the grinding efficiency is improved, and automatic and intelligent grinding is achieved.

Description

technical field [0001] The invention belongs to the field of precision machining, relates to the fields of acoustic emission technology, high-speed data acquisition and processing, and pattern recognition, and relates to a real-time on-line monitoring device for void travel and anti-collision in grinding machine processing, and specifically to the grinding state based on acoustic emission Measurement and control method and device. Background technique [0002] The current situation of the realization method of the grinding machine state measurement and control system is: the indirect detection method used for the grinding state of the grinding wheel and the workpiece is to detect some parameters that can reflect the contact state of the grinding wheel and the workpiece through the sensor during the grinding process, and can realize the grinding state. Online real-time monitoring. [0003] (1) Vibration signal detection technology [0004] The vibration signal generated dur...

AI Technical Summary

Problems solved by technology

[0022] Defects of the existing technology: the AEMS system developed abroad is expensive, the cost of putting it into use is high, the repair cost is expensive, and it lacks specificity for the use of certain non-destructive testing aspects

In the domestic grinding machine state measurement and control system, some implementation platforms based on LabVIEW, ARM and DSP have defects in high-speed data acquisition, the acquisition and processing of acoustic emission signals cannot be synchronized in real time, and there are insufficient continuous acquisition and storage of high-speed data and remote management. Most grinding machine monitoring systems are dedicated systems with poor openness, low detection accuracy of grinding status, and misjudgment phenomenon, and the status response sensitivity of the system is low and the time is prolonged.

Images