面向软磁铁氧体磁芯的超声波去毛刺研究

发布时间：2019-05-25 03:05

【摘要】：软磁铁氧体被广泛地应用于国防、通讯、航空航天等领域。为了去除在加工过程中存在的退拔毛刺，本文基于超声振动去毛刺原理，研制了面向软磁铁氧体磁芯的超声波去毛刺机。针对超声波换能器和变幅杆两个关键部分进行了参数设计和优化，具体内容安排如下：第一章，首先，介绍了我国软磁铁氧体磁芯的应用、产能和加工过程；其次，比较了8种典型的去毛刺方法后选择超声波法去除软磁铁氧体磁芯毛刺；最后，，对超声波去毛刺机中的超声波换能器和超声波变幅杆的发展进行了介绍。第二章，对超声波去毛刺样机进行了总体设计，阐述了样机的基本结构和各个部分的相互关系，给出了样机的控制系统和超声波振子的设计思路。第三章，为利用超声波有效去除软磁铁氧体等脆性材料的表面毛刺且不损伤工件，设计了压电式换能器。首先通过力电类比法设计，建立了压电换能器的几何尺寸参数计算模型，然后利用四端网络模型计算了换能器的位移分布，设计并计算了相关参数。第四章，通过对毛刺悬臂梁模型的分析，得到了超声波去毛刺所需要的振幅。结合超声波换能器能达到的振幅设计了复合高斯形变幅杆，计算了复合高斯形变幅杆的参数。第五章，首先，通过有限元分析的方法对超声波换能器和超声波变幅杆的设计过程进行验证；其次，对超声波换能器和超声波变幅杆组合在一起形成超声波振子进行优化；再次，将超声波振子的模型分析值与有限元分析值进行比较得到模型误差，验证了模型的准确性；最后，取一软磁铁氧体磁芯进行加工，验证了超声波去毛刺样机的有效性。最后，对本文所做的重点工作进行了总结，并指出文章和超声波去毛刺样机本身存在的不足之处。
[Abstract]:Soft magnetic Ferrite is widely used in national defense, communication, aerospace and other fields. In order to remove the pullout burr existing in the processing process, based on the principle of ultrasonic vibration deburring, an ultrasonic deburring machine for soft magnetic Ferrite core is developed in this paper. The parameters of ultrasonic transducer and variable amplitude rod are designed and optimized. the specific contents are as follows: in the first chapter, the application, productivity and processing process of soft magnetic Ferrite core in China are introduced. Secondly, eight typical deburring methods are compared, and the ultrasonic method is selected to remove the soft magnetic Ferrite core burr. Finally, the development of ultrasonic transducer and ultrasonic amplitude bar in ultrasonic deburring machine is introduced. In the second chapter, the overall design of the ultrasonic deburring prototype is carried out, the basic structure of the prototype and the relationship between each part are expounded, and the control system of the prototype and the design idea of the ultrasonic oscillator are given. In chapter 3, in order to effectively remove the surface burr of brittle materials such as soft magnetic Ferrite by ultrasonic wave, a piezoelectric transducer is designed. Firstly, the geometric size parameter calculation model of piezoelectric transducer is established through the design of electromechanical analogy method, and then the displacement distribution of the transducer is calculated by using the four-terminal network model, and the related parameters are designed and calculated. In the fourth chapter, through the analysis of the burr cantilever model, the amplitude needed for ultrasonic burr removal is obtained. Combined with the amplitude reached by ultrasonic transducer, the composite Gao Si deformation amplitude rod is designed, and the parameters of the composite Gao Si deformation amplitude rod are calculated. In the fifth chapter, firstly, the design process of ultrasonic transducer and ultrasonic amplitude-changing rod is verified by finite element analysis. Secondly, the ultrasonic transducer and ultrasonic amplitude-changing rod are combined to form ultrasonic oscillator. Thirdly, the model error is obtained by comparing the model analysis value of ultrasonic oscillator with the finite element analysis value, and the accuracy of the model is verified. Finally, a soft magnetic core is used to process the ultrasonic de-burr prototype to verify the effectiveness of the ultrasonic deburring prototype. Finally, the key work done in this paper is summarized, and the shortcomings of the article and ultrasonic deburring prototype are pointed out.
【学位授予单位】：中国计量学院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM277;TB552

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