Grinding performance of textured monolayer CBN wheels: Undeformed chip thickness nonuniformity modeling and ground surface topography prediction
Grinding performance of textured monolayer CBN wheels: Undeformed chip thickness nonuniformity modeling and ground surface topography prediction
复制标题
织构单层CBN砂轮的磨削性能：未变形切屑厚度不均匀性建模和地面形貌预测
DOI：
10.1016/j.ijmachtools.2017.05.006
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发表时间：
2017-11-01
影响因子：
14
通讯作者：
Fu, Yucan
中科院分区：
文献类型：
--
作者：
Ding, Wenfeng;Dai, Chenwei;Fu, Yucan
磨削表面粗糙度和表面形貌通常用来表征表面光洁度。在织构单层CBN砂轮的应用中，砂轮拓扑结构的不均匀会导致未变形的切屑厚度不均匀，这对磨削表面有很大的影响。为了更准确、更有效地预测磨削表面形貌，本研究进行了磨削实验，测量了砂轮的形貌。利用Johnson变换及其逆变换重建了单层织构CBN砂轮的测量表面拓扑结构。用改进的模型确定了车轮拓扑演化对未变形切屑厚度不均匀的影响。研究发现，随着未变形切屑厚度不均匀程度的不断减小，磨削表面粗糙度得到改善。确定了影响表面粗糙度的主要因素是活性颗粒百分率、未变形切屑厚度的平均值和标准差。重构的砂轮表面拓扑结构已被用于预测磨削过程不同阶段的工件表面形貌。
The ground surface roughness and topography are commonly used to characterize the surface finishing. In the application of textured monolayer CBN wheels, the nonuniformity of wheel topology will render a nonuniform undeformed chip thickness which greatly affects the ground surface. In order to predict the ground surface topography more accurately and efficiently, grinding experiment has been conducted in the current study, with measured grinding wheel topology. The measured surface topology of textured monolayer CBN wheels has been reconstructed by using the Johnson transformation and its inverse transformation. The influence of wheel topology evolution on the undeformed chip thickness nonuniformity has been determined with an improved model. It has been found the ground surface roughness is improved with a continuous reducing undeformed chip thickness nonuniformity. The percentage of active grains, the mean value and standard deviation of undeformed chip thickness have been found the main factors in determining the surface roughness. The reconstructed wheel surface topology has been used to predict the workpiece topography in different stages of the grinding process.