瀑布式振动光饰设备振动系统的理论分析与仿真研究

发布时间：2018-04-29 05:05

本文选题：滚磨光整加工 + 瀑布式振动光饰　；参考：《太原理工大学》2016年硕士论文

【摘要】：滚磨光整加工技术是一种操作简单、加工成本低、生产效率高、功能应用广泛、环境污染小的加工方法,其加工过程的研究融合机械、物理、力学、化学、数学等多门学科。在传统滚磨光整加工技术持续发展的同时,新型滚磨光整加工技术也在不断涌现。瀑布式振动光饰设备是20世纪80年代的美国专利产品,经过多年的不断完善和改进,已经在工艺试验方面有了较全面、深入的研究,目前已在全球工业发达国家较好应用。在太原理工大学光整技术研究所技术支持下,国内已引进使用3台设备。立足引进吸收消化再创新的理念,有必要对其振动系统进行深入细致的理论分析,同时借助离散元方法对加工过程中颗粒系统进行实时仿真是机理研究的一种有效方法。本文在对瀑布式振动光饰设备进行简要分析的基础上,重点对其振动系统中振动装置、弹簧系统、动态颗粒介质等不同特征采用不同方法进行研究,主要研究的内容及结论如下:1.以设备整个振动系统为研究对象进行了受力分析,得出振幅与激振力的计算公式,然后运用Matlab分析了振动频率、振幅、角速度比、阻尼比等各参数之间的相互关系。2.弹簧系统是瀑布式振动设备的重要组成部分,对其进行分析及仿真,得出了设备工作状态下的位移变化规律,并针对弹簧研究提出了建议。分析结果显示:设备的疲劳寿命为5.89×105,最小载荷因子为1.337,在疲劳寿命范围内,弹簧系统满足设备要求;一阶振动频率为16Hz,激振电机的工作频率要远离该频率值。3.运用离散元法对动态颗粒介质进行仿真,分析了颗粒系统、颗粒与工件、颗粒与颗粒间各参数的变化规律,利用网格来选取圆柱表面类、棱边类等特征部位的参数,分析了颗粒对工件局部位置的加工效果,探讨了流场间隙对平面类特征加工效果的影响。最后,对瀑布式振动光饰设备的振幅、振动频率进行了仿真。4.针对工件加工均匀性差的问题,提出并仿真了附加工件回转运动以及瀑布式三维振动方式的加工效果。仿真结果显示:附加工件的回转运动对加工均匀性有改善作用,瀑布式三维振动方式较瀑布式一维振动方式去除能力强,适用于加工要求去除量大的工件及盲孔、流道等难以加工的特征部位。通过分析与仿真研究,对瀑布式振动光饰设备进行了理论分析与仿真研究,进一步明晰了该设备的加工机理,对后续的研发工作提供了有益的理论探索。
[Abstract]:Rolling finishing technology is a kind of processing method with simple operation, low processing cost, high production efficiency, wide application of functions and little environmental pollution. The research of its processing process integrates mechanical, physical, mechanical, chemical, mathematical and other subjects. With the continuous development of traditional rolling finishing technology, new rolling finishing technology is emerging. The Falls Vibratory finishing equipment is a patent product of the United States in the 1980s. After many years of continuous improvement and improvement, there has been a more comprehensive and in-depth research in the field of process testing, which has been well applied in the developed countries of industry all over the world. Under the technical support of the Institute of finishing Technology of Taiyuan University of Technology, 3 equipments have been imported and used in China. Based on the new concept of absorption digestion and innovation it is necessary to make a thorough theoretical analysis of the vibration system and to simulate the particle system in real time with the help of discrete element method which is an effective method to study the mechanism. Based on the brief analysis of the waterfall vibration finishing equipment, this paper focuses on the research of the vibration device, spring system, dynamic particle medium and other different characteristics of its vibration system by using different methods. The main contents and conclusions are as follows: 1. Taking the whole vibration system of the equipment as the object of study, the force analysis is carried out, and the formula of amplitude and exciting force is obtained. Then, the relationship between vibration frequency, amplitude, angular velocity ratio, damping ratio and other parameters is analyzed by using Matlab. Spring system is an important part of waterfall vibration equipment. By analyzing and simulating the spring system, the law of displacement variation in the working state of the equipment is obtained, and some suggestions for spring research are put forward. The results show that the fatigue life of the equipment is 5.89 脳 10 ~ 5 and the minimum load factor is 1.337. In the range of fatigue life, the spring system meets the requirements of the equipment, and the first order vibration frequency is 16 Hz, the working frequency of the exciting motor should be far away from the frequency value of .3. In this paper, the discrete element method is used to simulate the dynamic granular media, and the variation rules of the parameters of particle system, particle and workpiece, particle and particle are analyzed, and the parameters of cylindrical surface class, edge class and other characteristic parts are selected by means of grid. The machining effect of particle on the local position of workpiece is analyzed, and the effect of flow field clearance on the machining effect of planar feature is discussed. Finally, the amplitude and vibration frequency of the waterfall vibration lighting equipment are simulated. 4. Aiming at the problem of poor workpiece processing uniformity, the machining effect of additional workpiece rotation motion and waterfall 3D vibration mode is proposed and simulated. The simulation results show that the rotational motion of the additional workpiece can improve the machining uniformity, and the waterfall three-dimensional vibration method has better removal ability than the waterfall one-dimensional vibration mode, which is suitable for the workpiece and blind hole which need to be removed. Characteristic parts such as channels that are difficult to process. Through the analysis and simulation research, this paper makes theoretical analysis and simulation research on the waterfall vibratory lighting equipment, further clarifies the processing mechanism of the equipment, and provides a beneficial theoretical exploration for the subsequent research and development work.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG580.2

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