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由于在原有的旋转运动基础上附加了轴向的超声振动,使得旋转超声加工(RUM)比普通磨削加工有明显的优势,例如,切削力小、刀具磨损轻等等。尽管如此,旋转超声加工仍然不能避免硬脆性材料加工中的边缘破损等常见问题。本文对边缘破损进行了较深入的研究,在有限元应力分析的基础上分析了边缘破损的根本原因,并提出了相应的措施来减小边缘破损。最后进行了实验验证,并把方此法应用到了实际的加工生产中,证明了其有效性和实用性。
Rotary ultrasonic machining (RUM) offers significant advantages over conventional grinding processes due to the addition of axial ultrasonic vibrations to the original rotational motion, for example, low cutting forces and light tool wear. In spite of this, rotary ultrasonic machining still can not avoid the common problems such as the edge breakage in the processing of hard and brittle materials. In this paper, the edge damage is studied in more depth. Based on the finite element stress analysis, the root cause of edge damage is analyzed and the corresponding measures are proposed to reduce the edge damage. Finally, the experimental verification, and the square method applied to the actual processing, proved its effectiveness and practicality.