【摘要】：無心車床是一種高效切削金屬棒材的機床,主要針對于金屬棒材的外圓進行切削加工,獲得具有很高的表面粗糙度和較高直線度的金屬棒料。近年來,無心車床作為細長金屬棒材高效加工設備被廣泛的應用,而無心車床導向機構是無心車床的關鍵部件,在棒料車削過程中對棒材起導向、支撐和夾緊的作用,它的性能直接影響到無心車床整機的加工的質量和效率。本文在ADAMS中建立無心車床導向機構三維模型并進行運動仿真,通過ADMAS后處理軟件輸出導輪的力學曲線和位移曲線;同時在參數(shù)化建模時考慮棒材自重,用MATLAB進行計算棒材彎矩、撓度等,通過對導向機構的優(yōu)化達到減少拉桿對機體拉傷的目的;此外在ANSYS里得到導向機構的柔性體,并建立關鍵點后導入ADMAS中進行仿真得到棒材在切削加工時關鍵位置的加速度,對其工作中的振動情況進行研究,最后通過實驗驗證理論的正確性。本文得到的結果,為產品的實驗、制造、設計、性能改善等提供依據(jù)。具體的研究工作內容如下:(1)首先介紹有關無心車床在國內外研究現(xiàn)狀、基本結構,并對無心車床導向機構的研究內容和工作過程及其在研究中需要注意的問題做了簡單的介紹;(2)利用ADMAS運動仿真軟件建立導向機構的三維模型并得到其導向機構滾輪的軌跡曲線和導向機構對棒材的壓緊力曲線;(3)建立設計變量,對導向機構的參數(shù)化設計和導向機構的優(yōu)化,由于無心車床導向機構中,其桿件和機體之間所受的拉力可造成桿件的拉傷,通過改變參數(shù)的設計的方法來解決拉傷問題,使導向機構單元結構更加合理;(4))利用ADMAS/ANSYS對無心車床導向機構進行運動特性分析,得到在柔性體導向機構關鍵位置的加速度,利用MATLAB得到其振動位移;(5)搭建實驗平臺進行實驗分析,利用加速度傳感器測無心車床加工棒料過程中導向機構單元上關鍵點的加速度數(shù)據(jù),測得的數(shù)據(jù)在MATLAB中進行處理,兩次積分得到關鍵位置的位移曲線,將實驗數(shù)據(jù)與第四條得出的仿真數(shù)據(jù)進行對比,由此來驗證仿真的正確性。
[Abstract]:Centerless lathe is a kind of machine tool for cutting metal bar with high efficiency. The metal bar with high surface roughness and high straightness can be obtained by cutting the outer circle of metal bar. In recent years, the centerless lathe is widely used as the high efficient processing equipment of slender metal bar. The guiding mechanism of the centerless lathe is the key part of the centerless lathe, which plays a guiding, supporting and clamping role on the bar during the turning process of the bar. Its performance directly affects the machining quality and efficiency of the centerless lathe. In this paper, the three-dimensional model of guide mechanism of centerless lathe is established in ADAMS, and the motion simulation is carried out. The mechanical curve and displacement curve of guide wheel are outputted by ADMAS post-processing software, and the bending moment of bar is calculated by MATLAB when considering the weight of bar in parameterized modeling. Deflection and the like, through the optimization of the guiding mechanism to achieve the purpose of reducing the pull rod to the body, in addition, in ANSYS, the flexible body of the guiding mechanism is obtained. The key points are established and introduced into ADMAS to simulate the acceleration of the key position of the bar in the cutting process. The vibration of the bar in the cutting process is studied. Finally, the correctness of the theory is verified by experiments. The results obtained in this paper provide the basis for the experiment, manufacture, design and performance improvement of the product. The specific contents of the research work are as follows: (1) the current research situation and basic structure of the centerless lathe at home and abroad are introduced. The research content and working process of the guide mechanism of centerless lathe and the problems needing attention in the research are simply introduced. (2) the three-dimensional model of the guiding mechanism is established by using the ADMAS motion simulation software and the rolling of the guiding mechanism is obtained. The track curve of the wheel and the compaction force curve of the guide mechanism to the bar; (3) the design variable is established, For the parametric design of guide mechanism and the optimization of guide mechanism, because of the tension between the rod and the body in the guide mechanism of the centerless lathe, the tensile injury of the rod can be solved by changing the design method of the parameters. (4) using ADMAS/ANSYS to analyze the motion characteristics of the guide mechanism of the centerless lathe, and get the acceleration at the key position of the flexible body steering mechanism. The vibration displacement is obtained by using MATLAB. (5) the experimental platform is built for experimental analysis, and the acceleration data of the key points of the guide mechanism unit in the machining process of the centerless lathe are measured by the acceleration sensor, and the measured data are processed in the MATLAB. The displacement curve of the key position is obtained by two times integration, and the experimental data is compared with the simulation data obtained from the fourth section, which verifies the correctness of the simulation.
【學位授予單位】：西安建筑科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG502.3

【參考文獻】

相關期刊論文 前10條

1 史麗晨;杜小淵;豆衛(wèi)濤;張霄;;基于無心車床主軸電機電流的鈦合金切削力經(jīng)驗公式的實驗研究[J];機械設計與制造;2017年03期

2 李宇超;謝銳;姚舜才;;基于MATLAB的測量數(shù)據(jù)濾波與最優(yōu)控制方法研究[J];電子科學技術;2016年01期

3 李超群;楊文彩;楊航;劉明月;林利;;基于ANSYS三七播種機機架的模態(tài)及諧響應分析[J];制造業(yè)自動化;2015年07期

4 賈興民;李劍峰;孫杰;;鈦合金TC4切削力試驗研究[J];機械設計與制造;2014年10期

5 王許可;;機載武器發(fā)射系統(tǒng)剛柔耦合動力學仿真[J];四川兵工學報;2014年07期

6 豆衛(wèi)濤;彭常戶;任源;賈慶功;馬樂;;無心車床軸系部件同軸度對加工精度的影響及調整方法研究[J];制造技術與機床;2014年04期

7 汪順利;丁毓峰;王琳;盛步云;盧其兵;;基于LabVIEW的機床主軸振動測量與分析[J];組合機床與自動化加工技術;2014年02期

8 韓曉輝;;無心車床進給傳動機構分析[J];機械工程師;2013年09期

9 王麗;;基于matlab/FDATool的語音信號濾波處理[J];德州學院學報;2013年04期

10 吳騰慶;劉恒;景敏卿;陳增凡;樊紅衛(wèi);;高速電主軸支承剛度計算及模態(tài)分析[J];機械設計與制造;2013年08期

相關碩士學位論文 前10條

1 牛麗娜;半盲圖像復原技術的研究與改進[D];太原理工大學;2014年

2 李超;高速銑削電主軸動態(tài)熱態(tài)特性分析及實驗研究[D];哈爾濱工業(yè)大學;2013年

3 王玉強;基于ADAMS的液壓挖掘機工作裝置的仿真分析及優(yōu)化設計[D];長安大學;2013年

4 何成浩;數(shù)控車床床身結構的有限元分析與優(yōu)化研究[D];昆明理工大學;2013年

5 李海峰;一種高效外圓加工機床的設計與仿真[D];沈陽理工大學;2013年

6 黃漢琨;高速、大功率電主軸優(yōu)化設計及其靜動態(tài)特性分析[D];江西理工大學;2012年

7 蘇江飛;高速立式加工中心主軸部件的設計與研究[D];陜西科技大學;2012年

8 陳遠大;斯特林機菱形機構結構優(yōu)化與剛柔耦合動力學仿真[D];重慶大學;2012年

9 溫得英;高速加工中心電主軸的靜動態(tài)特性分析[D];蘭州理工大學;2012年

10 劉玉;高速機床主軸單元的動態(tài)特性分析及結構優(yōu)化[D];青海大學;2012年

，

本文編號：2271512