本文選題：滑動結合面 + 潤滑　； 參考：《昆明理工大學》2015年碩士論文

【摘要】：在機床日趨向高精密以及高性能方向發(fā)展的形勢下,機床導軌結合面的特性對機械整機動態(tài)性能的影響也愈發(fā)明顯,并且在機械結構的整體剛度中,結合面的剛度往往是比較薄弱的環(huán)節(jié),所以對結合面的研究就顯得尤為重要。同時機械結合面介觀尺度的動態(tài)特性是進行復雜機械系統(tǒng)以及微細機械系統(tǒng)的動態(tài)設計和優(yōu)化設計的關鍵技術和基礎研究理論之一,因此研究機床導軌結合面介觀尺度的力學特性以及宏觀動態(tài)特性與介觀力學特性之間的聯(lián)系具有非常重要的理論意義和工程應用價值,是一個應用前景非常廣闊并在國內機床行業(yè)發(fā)展中起重要作用的科技問題。本文在接觸力學、模態(tài)分析、分形理論、流體力學以及平均流動的廣義Reynolds方程等知識的基礎上,結合粗糙表面內部潤滑油的滲出機理與結合面間油膜的擠壓特性,分別從宏觀和介觀兩個方向對結合面的動態(tài)特性進行了分析與研究。論文通過對粗糙表面介觀W-M分形函數(shù)、分形理論、流體特性以及平均流動的廣義Reynolds方程等方面的總結與分析,推導得到了部分膜狀態(tài)下結合面綜合等效剛度與綜合等效阻尼的數(shù)學模型,并通過MATLAB對其進行了仿真分析,結果表明：當結合面實際接觸面積比率達到一定值時,結合面的接觸剛度與接觸阻尼達到一個比較理想的狀態(tài),該分析結果可以為粗糙表面的加工與初始法向載荷的施加提供重要的指導。在前期研究的基礎上,利用工程等效原理,基于等效單自由度系統(tǒng)的通用結合面單元面積參數(shù)識別方法,設計并制造了消除基礎位移影響的滑動導軌物理實驗平臺,同時,通過實驗對裝置動、靜兩個狀態(tài)下的剛度和阻尼參數(shù)進行了識別,結果顯示在合適的法向載荷下結合面的剛度與阻尼達到比較良好的狀態(tài),與結合面介觀動態(tài)特性的仿真分析結果相符。本文以實際應用為出發(fā)點,實現(xiàn)了部分膜狀態(tài)下結合面介觀力學特性的建模與仿真分析以及滑動結合面動態(tài)特性參數(shù)的獲取,為結合面宏介觀動態(tài)特性的聯(lián)系提供了良好的參考價值。
[Abstract]:With the development of the machine tool towards high precision and high performance, the influence of the characteristics of the guide rail joint on the dynamic performance of the machine is becoming more and more obvious, and in the overall stiffness of the mechanical structure, The stiffness of the joint surface is often a weak link, so the study of the joint surface is particularly important. At the same time, the dynamic characteristics of mesoscopic scale of mechanical interface is one of the key technologies and basic research theories for dynamic design and optimization design of complex mechanical systems and micro-mechanical systems. Therefore, it is of great theoretical significance and engineering application value to study the mechanical properties of the mesoscopic scale and the relationship between the macroscopic dynamic characteristics and the mesoscopic mechanical properties of the joint surface of the machine tool guideway. It is a very broad application prospect and plays an important role in the development of domestic machine tool industry. In this paper, based on the knowledge of contact mechanics, modal analysis, fractal theory, hydrodynamics and the generalized Reynolds equation of average flow, the exudation mechanism of lubricating oil on rough surface and the extrusion characteristics of interplanar oil film are combined. The dynamic characteristics of the bonding surface are analyzed and studied in both macroscopic and mesoscopic directions. In this paper, the mesoscopic W-M fractal function of rough surface, fractal theory, fluid characteristics and generalized Reynolds equation of mean flow are summarized and analyzed. The mathematical model of the composite equivalent stiffness and damping of the bonding surface under partial membrane state is derived and simulated by MATLAB. The results show that when the actual contact area ratio of the bonding surface reaches a certain value, The contact stiffness and contact damping of the contact surface reach an ideal state. The analysis results can provide important guidance for the machining of rough surface and the application of initial normal load. Based on the previous research and the engineering equivalent principle, a physical experimental platform for sliding guideway is designed and manufactured based on the general identification method of the area parameters of the element of the coupling plane based on the equivalent single-degree-of-freedom system. At the same time, a physical experimental platform is designed and manufactured to eliminate the influence of the foundation displacement. The stiffness and damping parameters of the device under dynamic and static conditions are identified by experiments. The results show that the stiffness and damping of the joint plane reach a better state under proper normal load. The results are consistent with the simulation results of the mesoscopic dynamic characteristics of the bonding surface. In this paper, based on the practical application, the modeling and simulation of mesoscopic mechanical properties of bonding surfaces and the acquisition of dynamic parameters of sliding bonding surfaces are realized. It provides a good reference value for the connection of mesoscopic dynamic characteristics of surface macroscopes.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TG502

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本文編號：2035786