發(fā)布時間：2018-04-29 05:05

  本文選題：滾磨光整加工 + 瀑布式振動光飾��； 參考：《太原理工大學》2016年碩士論文

【摘要】：滾磨光整加工技術(shù)是一種操作簡單、加工成本低、生產(chǎn)效率高、功能應用廣泛、環(huán)境污染小的加工方法,其加工過程的研究融合機械、物理、力學、化學、數(shù)學等多門學科。在傳統(tǒng)滾磨光整加工技術(shù)持續(xù)發(fā)展的同時,新型滾磨光整加工技術(shù)也在不斷涌現(xiàn)。瀑布式振動光飾設備是20世紀80年代的美國專利產(chǎn)品,經(jīng)過多年的不斷完善和改進,已經(jīng)在工藝試驗方面有了較全面、深入的研究,目前已在全球工業(yè)發(fā)達國家較好應用。在太原理工大學光整技術(shù)研究所技術(shù)支持下,國內(nèi)已引進使用3臺設備。立足引進吸收消化再創(chuàng)新的理念,有必要對其振動系統(tǒng)進行深入細致的理論分析,同時借助離散元方法對加工過程中顆粒系統(tǒng)進行實時仿真是機理研究的一種有效方法。本文在對瀑布式振動光飾設備進行簡要分析的基礎上,重點對其振動系統(tǒng)中振動裝置、彈簧系統(tǒng)、動態(tài)顆粒介質(zhì)等不同特征采用不同方法進行研究,主要研究的內(nèi)容及結(jié)論如下:1.以設備整個振動系統(tǒng)為研究對象進行了受力分析,得出振幅與激振力的計算公式,然后運用Matlab分析了振動頻率、振幅、角速度比、阻尼比等各參數(shù)之間的相互關(guān)系。2.彈簧系統(tǒng)是瀑布式振動設備的重要組成部分,對其進行分析及仿真,得出了設備工作狀態(tài)下的位移變化規(guī)律,并針對彈簧研究提出了建議。分析結(jié)果顯示:設備的疲勞壽命為5.89×105,最小載荷因子為1.337,在疲勞壽命范圍內(nèi),彈簧系統(tǒng)滿足設備要求;一階振動頻率為16Hz,激振電機的工作頻率要遠離該頻率值。3.運用離散元法對動態(tài)顆粒介質(zhì)進行仿真,分析了顆粒系統(tǒng)、顆粒與工件、顆粒與顆粒間各參數(shù)的變化規(guī)律,利用網(wǎng)格來選取圓柱表面類、棱邊類等特征部位的參數(shù),分析了顆粒對工件局部位置的加工效果,探討了流場間隙對平面類特征加工效果的影響。最后,對瀑布式振動光飾設備的振幅、振動頻率進行了仿真。4.針對工件加工均勻性差的問題,提出并仿真了附加工件回轉(zhuǎn)運動以及瀑布式三維振動方式的加工效果。仿真結(jié)果顯示:附加工件的回轉(zhuǎn)運動對加工均勻性有改善作用,瀑布式三維振動方式較瀑布式一維振動方式去除能力強,適用于加工要求去除量大的工件及盲孔、流道等難以加工的特征部位。通過分析與仿真研究,對瀑布式振動光飾設備進行了理論分析與仿真研究,進一步明晰了該設備的加工機理,對后續(xù)的研發(fā)工作提供了有益的理論探索。
[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.
【學位授予單位】：太原理工大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TG580.2

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本文編號：1818498