用于功率超声磨削声学系统的阶梯型变幅杆节点位置研究

Research on the Node Position of Stepped Horn Using in Power Ultrasonic Grinding System

通过理论推导及有限元仿真模拟,分析找出了阶梯型变幅杆节点实际位置与传统理论位置的差别,同时分析指出超声波在变幅杆中传播时将引起材料的横向变形,泊松比的存在使纵向弹性变形会引起材料的横向变形。分析了阶梯型变幅杆振动特性,指出节点向细端移动可以减小节盘的振动。通过阶梯型变幅杆节点位置实验,验证了以上分析结论。

Through theoretical derivation and finite element simulation,the difference between the actual node position and the theoretical node position of the stepped horn is found.At the same time,the lateral deformation of material will occur when the ultrasonic wave transmit in the stepped horn is presented.That is to say,the longitudinal elastic deformation will induce to generate the lateral deformation of material because Poisson ratio exist.The vibration character of the stepped horn is analyzed.That the node disk can be reduced by moving the node position to the thin side is pointed out.Through the experiment about the node position of the horn,the results show that above-mentioned conclusion is correct.