【摘要】：在加工制造行業(yè)日益發(fā)展的今天，越來越多的高精度、復(fù)雜加工出現(xiàn)在人們面前，特別是對(duì)于復(fù)雜曲面的加工對(duì)加工機(jī)床的要求更高。傳統(tǒng)的串聯(lián)機(jī)床由幾級(jí)的懸臂部件鉸接而實(shí)現(xiàn)最終的加工要求，但由于鉸接的間隙與懸臂的變形的原因不能獲得較高的結(jié)構(gòu)剛度，而且誤差會(huì)累積到執(zhí)行端，嚴(yán)重的影響了加工的精度。而近年發(fā)展起來的并聯(lián)機(jī)構(gòu)正適應(yīng)了這一需要，并聯(lián)機(jī)構(gòu)具有剛度高、承載能力強(qiáng)、結(jié)構(gòu)緊湊的特點(diǎn)，與傳統(tǒng)的機(jī)構(gòu)形成了很好的互補(bǔ)，但并聯(lián)機(jī)構(gòu)連桿的變形及系統(tǒng)的振動(dòng)仍是影響精度的主要原因。 隨著計(jì)算機(jī)技術(shù)的發(fā)展，特別是仿真技術(shù)的發(fā)展，現(xiàn)代機(jī)械產(chǎn)品的開發(fā)優(yōu)化越來越依賴于計(jì)算機(jī)，本文運(yùn)用ADAMS虛擬樣機(jī)技術(shù)，以并聯(lián)機(jī)床為例進(jìn)行了簡(jiǎn)化機(jī)構(gòu)模型的剛?cè)狁詈辖：驼駝?dòng)分析。通過對(duì)模型的振動(dòng)分析得出對(duì)模型執(zhí)行端影響較大的方面，并對(duì)模型結(jié)構(gòu)進(jìn)行改進(jìn)，從而達(dá)到減小振動(dòng)提高精度的目的。 本文通過三維建模軟件UG對(duì)并聯(lián)機(jī)構(gòu)的簡(jiǎn)化模型進(jìn)行建立，根據(jù)實(shí)際的連接關(guān)系，將其裝配成一個(gè)完整的傳動(dòng)系統(tǒng)。通過數(shù)據(jù)傳遞，將建立的裝配模型導(dǎo)入到ADAMS中，建立傳動(dòng)裝置各部件之間的運(yùn)動(dòng)約束關(guān)系，完成仿真的前期處理工作。然后通過對(duì)關(guān)鍵變形部件進(jìn)行柔性體劃分，對(duì)相應(yīng)的剛性體予以替換，實(shí)現(xiàn)剛?cè)狁詈夏Ｐ偷慕�。通過仿真得到了各種條件下的振動(dòng)模態(tài)，即固有頻率、振型等特性，并針對(duì)不同的振動(dòng)類型分別進(jìn)行強(qiáng)迫振動(dòng)分析，研究了各種振動(dòng)的強(qiáng)迫振動(dòng)響應(yīng)特性。 在建立完成多柔體仿真模型的基礎(chǔ)上，通過對(duì)動(dòng)平臺(tái)添加剛度適當(dāng)?shù)娜崴鲝椈勺枘釞C(jī)構(gòu)，，對(duì)運(yùn)動(dòng)機(jī)構(gòu)進(jìn)行優(yōu)化處理。在對(duì)優(yōu)化后的模型進(jìn)行相同的激振輸入做振動(dòng)分析，比較優(yōu)化前與優(yōu)化后振動(dòng)響應(yīng)情況的變化，分析優(yōu)化前后機(jī)構(gòu)的特性變化，為以后的物理模型的建立提供依據(jù)。這對(duì)并聯(lián)機(jī)床在以上領(lǐng)域的理論與實(shí)際研究都具有重要意義。
[Abstract]:With the increasing development of the manufacturing industry, more and more high precision and complex machining appear in front of people, especially for the complex surface processing of machine tools. Traditional series machine tools are hinged by several stages of cantilever parts to achieve the final processing requirements. However, due to the clearance of hinges and the deformation of the cantilever, the higher structural stiffness can not be obtained, and the errors will accumulate to the executive end. The precision of machining is seriously affected. The parallel mechanism developed in recent years meets this need. The parallel mechanism has the characteristics of high stiffness, strong bearing capacity and compact structure, which is complementary to the traditional mechanism. However, the deformation of the connecting rod and the vibration of the parallel mechanism are still the main reasons to affect the accuracy. With the development of computer technology, especially the development of simulation technology, the development and optimization of modern mechanical products depend more and more on computer. This paper uses ADAMS virtual prototyping technology. The rigid-flexible coupling modeling and vibration analysis of the simplified mechanism model are carried out with a parallel machine tool as an example. Through the analysis of the vibration of the model, it is found that there is a great influence on the executive end of the model, and the structure of the model is improved so as to reduce the vibration and improve the accuracy. In this paper, the simplified model of the parallel mechanism is established by using the 3D modeling software UG, and it is assembled into a complete transmission system according to the actual connection relationship. Through the data transfer, the assembly model is imported into ADAMS, and the motion constraint relationship between the components of the transmission device is established, and the pre-processing work of simulation is completed. Then, by dividing the key deformed parts into flexible bodies and replacing the corresponding rigid bodies, the rigid-flexible coupling model is established. The vibration modes under various conditions, namely, natural frequency, vibration mode and so on, are obtained by simulation. The forced vibration characteristics of different vibration types are analyzed separately and the forced vibration response characteristics of various kinds of vibration are studied. On the basis of establishing the simulation model of multi-flexible body, the motion mechanism is optimized by adding a flexible spring damping mechanism with appropriate stiffness to the moving platform. The vibration analysis of the optimized model is done with the same excitation input, and the changes of vibration response before and after optimization are compared, and the characteristics of the mechanism before and after optimization are analyzed, which provides the basis for the establishment of the physical model in the future. This is of great significance to the theoretical and practical research of PMT in the above fields.
【學(xué)位授予單位】：沈陽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TP302;TP391.9

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 黃秀琴,沈惠平;一種新型具有三維移動(dòng)自由度并聯(lián)機(jī)器人運(yùn)動(dòng)學(xué)分析[J];常州工學(xué)院學(xué)報(bào);2004年02期

2 胡明,郭成,蔡光起,戴炬;一種三自由度并聯(lián)機(jī)器人機(jī)構(gòu)運(yùn)動(dòng)學(xué)計(jì)算[J];東北大學(xué)學(xué)報(bào);1998年04期

3 趙鐵石,黃真;一種新型四自由度并聯(lián)平臺(tái)機(jī)構(gòu)及其位置分析[J];機(jī)械科學(xué)與技術(shù);2000年06期

4 林福泳;3-RPS 并聯(lián)機(jī)構(gòu)運(yùn)動(dòng)分析[J];機(jī)械科學(xué)與技術(shù);1998年03期

5 李仕華,黃真;新型三維移動(dòng)3-RRUR并聯(lián)平臺(tái)機(jī)構(gòu)及其位置分析[J];機(jī)械設(shè)計(jì);2005年08期

6 汪勁松,關(guān)立文,王立平,李鐵民;并聯(lián)機(jī)器人機(jī)構(gòu)構(gòu)型創(chuàng)新設(shè)計(jì)研究[J];機(jī)械工程學(xué)報(bào);2004年11期

7 隋春平,張波,趙明揚(yáng),劉紅軍;一種3自由度并聯(lián)柔索驅(qū)動(dòng)柔性操作臂的建模與控制[J];機(jī)械工程學(xué)報(bào);2005年06期

8 張彥斐,宮金良,李為民,高峰;一種6自由度冗余驅(qū)動(dòng)并聯(lián)機(jī)器人運(yùn)動(dòng)學(xué)分析及仿真[J];機(jī)械工程學(xué)報(bào);2005年08期

9 劉延斌;韓秀英;薛玉君;賈現(xiàn)召;;3-RRRT并聯(lián)機(jī)器人動(dòng)力學(xué)仿真[J];系統(tǒng)仿真學(xué)報(bào);2006年07期

10 焦廣發(fā);周蘭英;;ADAMS柔性體運(yùn)動(dòng)仿真分析及運(yùn)用[J];現(xiàn)代制造工程;2007年05期

相關(guān)碩士學(xué)位論文 前2條

1 谷慧茹;基于虛擬樣機(jī)技術(shù)的兩足并聯(lián)步行機(jī)器人步態(tài)規(guī)劃及仿真[D];河北工業(yè)大學(xué);2004年

2 胡福生;3PTT并聯(lián)機(jī)構(gòu)的研究及應(yīng)用初探[D];山東理工大學(xué);2006年

本文編號(hào)：2169153