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首先从理论上分析了振动辅助抛光的加工过程,通过建立单颗磨粒冲击工件的数学模型,分析了振动参数变化引起硬脆材料的塑-脆去除方式转变机制。采用LY-DYNA软件对球形和锥形磨粒冲击工件的仿真分析结果表明:随着振动参数的增强,磨粒切入深度增加,达到临界切削深度后产生裂纹脆性去除,从而能够实现工件材料的额外去除。在实验平台上开展的径向振动抛光实验结果表明:引入振动后抛光去除效率显著提升,证明了理论分析的正确性。
Firstly, the machining process of vibration assisted polishing was analyzed theoretically. By setting up the mathematical model of single abrasive impacting workpiece, the change mechanism of plastic-brittle removal mode of hard and brittle material was analyzed. The results of simulation analysis of the impacting workpiece with spherical and conical abrasive particles using LY-DYNA software show that as the vibration parameters increase, the penetration depth of abrasive particles increases, and the brittleness of the crack can be removed after reaching the critical depth of cut, so as to realize the extra work material Remove. The experimental results of radial vibration polishing carried out on the experimental platform show that the polishing removal efficiency is greatly improved after vibration is introduced, which proves the correctness of the theoretical analysis.