The effect of the rice movement and the forces acting on rice grains during abrasion in a mill is unclear limiting the development of rice milling machines. The aim of this work is to provide a numerical methodology for predicting the abrasion rate of rice to provide the basis for the design and use of rice mills and improving milling quality and efficiency. Here, the milling process was investigated experimentally in a laboratory using a vertical mill to identify the dominant abrasion mechanism and to the analyse of particle size distributions. In order to evaluate the abrasion rate, the effect of rotational speed of the roller shaft on the normal force and the sliding distance between particles and particle-geometry was examined using the discrete element method. Abrasion rate calculated according to the Archard abrasion equation from the simulation results and this agreed well with the experiment results thereby validating the feasibility of numerical-experimental approach. The relationship between rotational speed and abrasion rate was established based on polynomial fitting.

碾米过程中，碾米机运动的影响以及作用在碾米机上的力尚不清楚，这限制了碾米机的发展。这项工作的目的是提供一种预测大米磨耗率的数值方法，从而为设计和使用碾米机以及提高碾磨质量和效率提供基础。在这里，在实验室中使用立式磨机对研磨过程进行了实验研究，以确定主要的磨损机理并分析了粒度分布。为了评估磨损率，使用离散元方法研究了辊轴转速对法向力和颗粒之间的滑动距离以及颗粒几何形状的影响。根据仿真结果根据阿卡德磨耗方程计算出磨耗率，与实验结果吻合良好，从而验证了数值实验方法的可行性。基于多项式拟合建立了转速与磨损率之间的关系。