• CN:11-2187/TH
  • ISSN:0577-6686

›› 2014, Vol. 50 ›› Issue (5): 194-200.

• 论文 • 上一篇    下一篇

基于声发射信号的精密外圆切入磨削时间评估算法及试验研究

姜晨;李郝林   

  1. 上海理工大学机械工程学院
  • 发布日期:2014-03-05

Algorithm and Experiment of Estimation of Time of Precision Cylindrical Plunge Grinding Based on Acoustic Emission Signa

JIANG Chen;LI Haolin   

  1. College of Mechanical Engineering, University of Shanghai for Science and Technology
  • Published:2014-03-05

摘要: 针对精密外圆切入磨削智能监控的需求,设计一种基于声发射信号的磨削时间在线评估方法。通过建立声发射信号方均根值曲线预测模型,获得声发射信号与磨削系统时间常数的关系,设计磨削系统时间常数在线计算方法;利用在线检测的声发射信号识别砂轮运动去除状态,推导基于声发射信号的外圆切入磨削表面粗糙度评价和工件几何精度预测模型,以此建立砂轮进给与驻留时间的评估算法;编写磨削时间分析评估软件,设计磨削时间在线评估方法,通过加工试验分析磨削时间对磨削加工精度与表面粗糙度的影响规律,并对评估算法进行验证。试验结果表明:该评估方法能够根据磨削时间有效评价加工质量,为精密外圆切入磨削智能监控与工艺优化提供决策依据。

关键词: 外圆切入磨削;声发射;时间常数;加工效率

Abstract: To satisfy the requirement of intelligence processing of precision cylindrical plunge grinding, an estimation method of grinding time of axis parts is presented using acoustic emission (AE) signal. The relationship between the grinding system time constant and the AE signal is presented by establishing the model of the root mean square (RMS) curve of the AE signals. The estimation of the grinding system time constant is proposed and the kinematics of wheel is analyzed by the on-line AE signals. According to deducing the model of size error in the precision cylindrical plunge grinding, the estimation algorithms of infeed and dwell times are established using the AE measurement. In addition, the estimation software is developed and the estimation methods are designed. The experiments were preformed to analyze the relationship of grinding time and machining qualities, such as surface roughness and size error, and verified the proposed algorithms. The experimental results indicate that this method can be used in the estimation of processing time of the precision cylindrical plunge grinding to ensure the grinding precision and improve the grinding efficiency for intelligence control and process optimizing.

Key words: plunge grinding;acoustic emission;time constant;machining efficiency

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