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基于超声振动设计理论并结合超声振动变幅杆,设计了一种用于弱刚度材料超声辅助切割的直刃尖刀。建立了直刃尖刀和超声振动系统一体的有限元模型,系统分析了直刃尖刀刀体长度、厚度参数对超声振动系统谐振频率、振幅放大倍数和刀具纵向振幅的影响,探讨了刀具横向和侧向振幅沿刀具轴线方向的分布规律。针对特定的超声振动系统,确定了综合性能最优的刀具参数。研制了具有不同形状参数的去刃模拟刀具,并安装于同一超声振动系统进行测试,对仿真分析结论进行验证,理论分析与试验结果相一致。根据理论分析确定的最佳参数研制了直刃尖刀并测试了其振动性能。研究结论对超声辅助切削加工的直刃刀尖的研制提供了理论指导。
Based on the theory of ultrasonic vibration design combined with ultrasonic vibrating horn, a straight-edge sharp knife for ultrasonic-assisted cutting of weak-rigidity materials was designed. The finite element model of straight blade knife and ultrasonic vibration system is established. The influence of the length and thickness parameters of the straight knife blade on the resonant frequency, amplitude and the vertical amplitude of the ultrasonic vibration system are analyzed systematically. Distribution of amplitude along the tool axis direction. For the specific ultrasonic vibration system, determine the best overall tool parameters. The blade with different shape parameters was developed and mounted on the same ultrasonic vibration system for testing, and the simulation analysis results were verified. The theoretical analysis is consistent with the experimental results. According to the theoretical analysis to determine the best parameters developed a straight edge knife and tested its vibration performance. The conclusions of the study provide theoretical guidance for the development of the straight-edged cutting edge of ultrasonic assisted cutting.