超声波光整加工换能器的实验研究

发布时间：2018-10-31 16:29

【摘要】：随着科技的发展,一些难加工的硬、脆材料应用传统的加工方法已经很难达到加工的要求。超声波加工由于其对工件表面的作用力小、加工温度低而特别适合用与加工硬脆材料,因而在国防、航天等领域已经被广泛的应用。超声波光整加工作为其中一个重要的分支,由于其在加工效率及效果上的显著优势,特别适合用在加工活塞杆及液压油缸的内表面。本文介绍了超声波光整加工的背景、特点及优势；通过MATLAB仿真,从减震的角度分析了超声波光整的优势；设计了中心频率为30kHz的夹心式压电换能器,通过ANSYS仿真计算了匹配电感值,进行了强度的校核,并通过ANSYS Workbench进行瞬态热分析；设计了频率自动跟踪电路,通过实验测出了锁相环回路的锁频范围；设计了以全桥拓扑结构为基础的换能器驱动逆变主电路、信号发生电路、死区防护电路、IGBT驱动电路,并通过实验验证了电路设计的正确性；对研究内容进行总结,并对本课题的研究方向进行展望。
[Abstract]:With the development of science and technology, it is difficult for some hard and brittle materials to meet the requirements of processing. Ultrasonic machining is especially suitable for hard and brittle materials because of its small force on workpiece surface and low processing temperature, so it has been widely used in national defense, aerospace and other fields. As an important branch of ultrasonic finishing, ultrasonic finishing is especially suitable for machining the inner surface of piston rod and hydraulic cylinder because of its remarkable advantages in processing efficiency and effect. In this paper, the background, characteristics and advantages of ultrasonic finishing are introduced, and the advantages of ultrasonic finishing are analyzed from the angle of shock absorption through MATLAB simulation. A sandwich piezoelectric transducer with center frequency of 30kHz is designed. The matching inductance is calculated by ANSYS, the strength is checked, and the transient thermal analysis is carried out by ANSYS Workbench. The frequency automatic tracking circuit is designed, and the frequency locking range of the PLL loop is measured by experiment. The inverter main circuit, signal generation circuit, dead zone protection circuit and IGBT drive circuit based on full-bridge topology are designed, and the correctness of the circuit design is verified by experiments. The research content is summarized, and the research direction of this topic is prospected.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB552

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