Modelling of ceramic grinding processes Part I. Number of cutting points and grinding forces per grit
Modelling of ceramic grinding processes Part I. Number of cutting points and grinding forces per grit
复制标题
DOI：
10.1016/0924-0136(95)02232-5
复制
发表时间：
1997-03
影响因子：
6.3
通讯作者：
K. Li;Warren Liao
中科院分区：
文献类型：
--
作者：
K. Li;Warren Liao
建模对于任何过程的优化和控制都是必要的，以实现改进的产品质量、高生产率和低成本。在陶瓷磨削中，最重要的是通过考虑磨料与陶瓷材料之间的机械和热相互作用以及诱发的微裂纹和残余应力，建立磨削陶瓷的弯曲强度与砂轮规格、磨削条件和材料性能之间的关系的工艺模型。作为作者在这方面的首次研究，本文在模拟分析的基础上，对计算单位面积上的有效切削点数的几个理论公式进行了评价。结合陶瓷磨削实验获得的力数据，利用有效切削点的数量计算了每颗磨粒的平均法向磨削力和切向磨削力φ和φt。φNand和φtt都是刀具刃口平均横截面积或磨粒深度的幂函数。对于主要的韧性流动区域和主要的脆性断裂区域，φNAND和φtt的表达式是不同的。
Modelling is necessary for the optimization and control of any process to achieve improved product quality, high productivity and low cost. Of most importance in ceramic grindings is the establishment of process models that relates flexure strength of ground ceramics with wheel specifications, grinding conditions and material properties through consideration of mechanical and thermal interactions between the abrasive grits and the ceramic material and the induced microcracks and residual stresses. As the first effort of the author's research in this direction, this paper evaluates several theoretical equations for the calculation of the number of active cutting points per unit area based on a simulation analysis. Along with the force data obtained from ceramic grinding experiments, the number of active cutting points is used to calculate the average normal and tangential grinding forces per grit, φnand φt. Both φnand φtare found to be a power function of the average cross-sectional area of the cutting edges or the grit depth of cut. Different expressions for φnand φtare found for the predominant ductile-flow regime and the predominant brittle-fracture regime.