Kacalak Wojciech, Lipiński Dariusz, Szafraniec Filip, Banaszek Kamil, Rypina Łukasz
Faculty of Mechanical Engineering, Koszalin University of Technology, 75-620 Koszalin, Poland.
Doctoral School, Koszalin University of Technology, 75-453 Koszalin, Poland.
Materials (Basel). 2022 Aug 26;15(17):5920. doi: 10.3390/ma15175920.
In this article, the methodology of using probabilistic models of the grinding tool wear process is presented. Probabilistic modeling with empirical data allowed determining the values of other important process features. Among them, the distribution of active grains lifetime or distribution of cumulative attritious wear of the grinding grain apex could be distinguished. The results of modeling and wear analysis of grinding wheels as well as experimental results on peripheral grinding with zoned grinding wheels are presented. The analyzed grinding wheels consisted of three layers: two identical external layers with conventional structure and one internal layer containing the addition of abrasive aggregates. The external layers were profiled by chamfering the edges. As a result, their nominal surfaces were conical. The internal layer had a cylindrical shape and was designed for smoothing the surface after machining with external part. The tools were designed to increase the grinding efficiency and hence a good quality of machined surfaces could be acquired. For the experimental tests, the Ti6Al4V titanium alloy was used. It was found that the change in the shape and position of the grinding zone, as a result of volumetric wheel wear, caused a significant change in fracturing intensity. In the case of multilayer grinding tools, the wear process depends on the physical properties of each layer and their participation during machining of the workpiece. The presented methodology could be applied to a study on the machining process stages, which concerns temporary states and their variability according to the machining time.This makes it possible to reduce the cost of developing new tools dedicated to specific applications.
本文介绍了使用磨削工具磨损过程概率模型的方法。利用经验数据进行概率建模能够确定其他重要工艺特征的值。其中，可以区分出磨粒活性寿命的分布或磨粒顶点累积磨耗的分布。文中给出了砂轮建模与磨损分析的结果以及使用分区砂轮进行外圆磨削的实验结果。所分析的砂轮由三层组成：两层具有传统结构的相同外层和一层含有磨料聚集体添加剂的内层。外层通过倒棱进行成型。因此，它们的标称表面呈圆锥形。内层为圆柱形，设计用于在外部加工后对表面进行光整加工。这些工具旨在提高磨削效率，从而获得良好的加工表面质量。在实验测试中，使用了Ti6Al4V钛合金。研究发现，由于砂轮体积磨损导致磨削区形状和位置的变化，会引起破碎强度的显著变化。对于多层磨削工具，磨损过程取决于各层的物理性能及其在工件加工过程中的参与程度。所提出的方法可应用于对加工过程阶段的研究，该研究涉及根据加工时间的临时状态及其变化性。这使得降低开发特定应用专用新工具的成本成为可能。
