A model for predicting surface roughness in single-point diamond turning
A model for predicting surface roughness in single-point diamond turning
复制标题
单点金刚石车削中预测表面粗糙度的模型
DOI：
10.1016/j.measurement.2015.03.004
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发表时间：
2015-06-01
期刊：
影响因子：
5.6
通讯作者：
Zhao, Qingliang
中科院分区：
文献类型：
--
作者：
Chen, Junyun;Zhao, Qingliang
在以往的预测模型中，刀具与工件之间的相对振动没有足够的泛化来表示刀具与工件之间的实际位移。这是由于振动被假设为稳定的简谐运动，并且仅在车削过程之前测量。本文提出了一种改进的评估实际相对刀具工作振动的方法。利用该方法得到的振动信息包含了机床误差、切削力、材料特性和切削参数变化引起的分量，具有较高的可信度。此外，采用一种新的评价方法对膨胀效应进行了分析，并考虑了膨胀效应对表面粗糙度的影响。在分析相对振动和膨胀效应的基础上，提出了单点金刚石车削表面粗糙度R-a的预测模型。预测结果表明，与以往的模型相比，该模型更接近实际车削过程，对表面粗糙度的预测精度更高。(C) 2015 Elsevier Ltd.版权所有。
The relative tool-work vibration is not generalized enough to represent the actual displacement between tool and workpiece in previous prediction models. This is due to the fact that the vibration was assumed as a steady simple harmonic motion and was only measured before turning process. In this study, an improved method is presented to evaluate the actual relative tool-work vibration. By using this method the vibration information obtained is more credible, as it contains the components caused by machine tool error, cutting force, material property and changing of cutting parameters. Moreover, the swelling effect is analyzed using a new evaluating method and taken into account for predicting surface roughness. On the basis of analyzing both the relative vibration and the swelling effect, a model is proposed for predicting surface roughness R-a in single point diamond turning. Prediction results prove that this model is a closer approximation of the actual turning process as compared to the previous models and shows a higher predicting accuracy of surface roughness. (C) 2015 Elsevier Ltd. All rights reserved.