Estimation of the Surface Roughness in Cylindrical Plunge Grinding Based on Material Removal Model

基於材料去除模型的外圓切入式磨削表面粗糙度預測

遲玉倫(Yulun Chi) ； 葛愛麗(Aili Ge) ； 李郝林(Haolin Li)

《中國機械工程學刊》 40卷6期 (2019/12) Pp. 571-581

摘要

As an important variable of the grinding quality, the surface roughness is a variable often used to describe the performance of the finished part as well as to evaluate the competitiveness of the overall grinding system. Hence, the estimation of surface roughness can cater to the requirements of performance evaluation. A new surface roughness model for multi-infeed cylindrical plunge grinding based on the material removal rate is established by using the monitoring power signal. It shows that steady-state surface roughness and the change in surface roughness are related separately to the grinding wheel wear and the material removal rate, the relationships of which are investigated. A series of experiments was performed to verify that estimation algorithm of surface roughness is effective and repeatable in grinding process control. The results demonstrated that the roughness model is valuable for designing process parameters to achieve the grinding quality index and the process optimization.

關鍵字

cylindrical plunge grinding ； surface roughness estimation ； material removal rate model ； power signal

並列摘要

表面粗糙度作為磨削加工品質的一個重要指標，常用於評價產品零件性能以及整個磨削系統加工能力。因此，表面粗糙度預測可適用於系統性能評價的需求。本文利用監測功率信號建立了一種基於材料去除率的多進給外圓切入式磨削表面粗糙度模型。該模型表明穩態階段表面粗糙度變化分別與砂輪磨損和材料去除率有關，並研究了粗糙度與兩者之間的關係。最後，通過大量實驗驗證該表面粗糙度預測模型在磨削加工程式控制應用的有效性和可靠性。試驗結果表明該粗糙度預測模型對於優化磨削工藝參數和控制磨削加工品質具有重要意義。