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利用VHX-600E型超景深显微镜测量了金刚石砂轮表面的磨粒分布情况,计算得到了砂轮表面的磨粒密度、真实接触弧长以及砂轮总的磨粒数和有效磨粒数。基于磨粒间隔分布假设和虚拟格子方法在虚拟砂轮端面随机分布等磨粒密度的多颗正六面体磨粒,并随机分配磨粒的位姿以模拟砂轮的真实形貌。将1/4虚拟砂轮模型导入Deform-3D软件中,建立三维虚拟磨削仿真模型,采用Lagrangian Incremental算法获得多颗磨粒的仿真磨削力值,并建立了基于多颗磨粒磨削仿真的磨削力预测模型。通过金刚石砂轮端面磨削硬质合金刀片的实验,比较了实测磨削力与预测磨削力;仿真与实验结果具有一致性,证明了采用本方法建立的多颗磨粒虚拟磨削仿真模型可以用于磨削力预测,为多颗磨粒共同磨削的磨削力研究提供了新的思路。
The distribution of the abrasive particles on the surface of the diamond wheel was measured by using the VHX-600E super-depth microscope. The abrasive particle density, the true contact arc length, the total number of the abrasive wheels and the effective number of the abrasive wheels were calculated. Based on the distribution of abrasive grain interval and virtual lattice method, a plurality of regular hexahedron grains with different grain densities are randomly distributed on the end surface of the virtual grinding wheel, and the position and orientation of the abrasive grains are randomly assigned to simulate the true shape of the grinding wheel. The 1/4 virtual grinding wheel model was imported into Deform-3D software, the 3-D virtual grinding simulation model was established, and the Lagrangian Incremental algorithm was used to obtain the simulation grinding force value of multiple abrasive grains. The multi-abrasive grinding simulation Grinding force prediction model. The grinding force and the predicted grinding force were compared by the grinding of the diamond grinding wheel end face. The simulation and experimental results are consistent. It is proved that the simulation model of multiple grinding particles virtual grinding can be established by this method It is used for the prediction of grinding force and provides a new idea for the study of the grinding force of multiple abrasive grinding together.