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为了对超声振动铣磨加工先进陶瓷的表面粗糙度进行预测,建立了加工表面形貌的仿真模型.通过实验测得砂轮表面形貌和磨粒突出高度信息,并对这些信息进行Kolmogorov-Smirnov正态验证,发现砂轮表面形貌不服从高斯分布.对非高斯分布的数据进行Johnson变换,建立砂轮形貌的数值模型.结合砂轮表面形貌和磨粒与工件的相对运动分析,提出了一种表面轮廓搜索方法,进而生成了加工表面的三维形貌.最后,在DMG ULTRASONIC 70-5 linear机床上进行切削实验,对仿真结果进行了验证,结果表明仿真与实验结果具有较好的一致性,并对仿真误差产生的原因进行了分析.
In order to predict the surface roughness of advanced ceramic in ultrasonic vibratory milling, a simulation model of the machined surface topography was established.The surface morphology of the grinding wheel and the height information of abrasive grains were measured experimentally, and the Kolmogorov-Smirnov positive State test, we found that the wheel surface morphology does not obey the Gaussian distribution.The data of non-Gaussian distribution is transformed by Johnson, and the numerical model of the wheel morphology is established.According to the surface morphology of grinding wheel and the relative motion analysis between abrasive and workpiece, Surface profile search method to generate the three-dimensional topography of the machined surface.Finally, the cutting experiment is carried out on the DMG ULTRASONIC 70-5 linear machine tool, the simulation results are verified, the results show that the simulation and experimental results have good consistency, The causes of simulation errors are analyzed.