Li Zhihao, Zhao Yugang, Liu Guangxin, Cao Chen, Liu Qian, Zhao Dandan, Zhang Xiajunyu, Zhao Chuang, Yu Hanlin
School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China.
Micromachines (Basel). 2022 Aug 23;13(9):1369. doi: 10.3390/mi13091369.
High-performance iron-based AlO magnetic abrasive powder (MAP) prepared by combining plasma molten metal powder with sprayed abrasive powder is used for magnetic abrasive finishing (MAF) of AZ31B magnesium alloy to remove surface defects such as creases, cracks, scratches, and pits generated during the manufacturing process of the workpiece, and to reduce surface roughness and improve its wear and corrosion resistance. In order to solve the problem of magnetic abrasive powder splash in the MAF process, the force analysis of the MAP in the processing area is conducted, and a composite magnetic pole processing device was designed and simulated to compare the effects of both devices on MAF, confirming the feasibility of composite magnetic pole grinding. Then, experiments have been designed using Response Surface Methodology (RSM) to investigate the effect of four factors-magnetic pole rotation speed, grinding gap, magnetic pole feed rate, magnetic abrasive filling quantity-on surface roughness and the interactions between them. The minimum surface roughness value that can be obtained is used as the index for parameter optimization, and the optimized parameters are used for experiments, and the results show that the established surface roughness model has good predictive ability.
通过将等离子体熔融金属粉末与喷射磨料粉末相结合制备的高性能铁基AlO磁性磨料粉末（MAP）用于AZ31B镁合金的磁性磨料光整加工（MAF），以去除工件制造过程中产生的诸如褶皱、裂纹、划痕和凹坑等表面缺陷，并降低表面粗糙度，提高其耐磨性和耐腐蚀性。为了解决MAF过程中磁性磨料粉末飞溅的问题，对加工区域内的MAP进行了受力分析，并设计和模拟了复合磁极加工装置，以比较两种装置对MAF的影响，证实了复合磁极磨削的可行性。然后，采用响应面法（RSM）设计实验，研究磁极转速、磨削间隙、磁极进给速度、磁性磨料填充量这四个因素对表面粗糙度的影响以及它们之间的相互作用。将可获得的最小表面粗糙度值作为参数优化指标，采用优化后的参数进行实验，结果表明所建立的表面粗糙度模型具有良好的预测能力。
