【摘要】：針對國內(nèi)數(shù)控機床滾動功能部件選型與應(yīng)用方面集成研究與指導(dǎo)方面的不足,本文立足于使用用戶,針對產(chǎn)品生產(chǎn)周期之后的選型—安裝調(diào)試—使用維護等一系列流程,注重工程應(yīng)用,循序漸進,產(chǎn)開了本項目的各個研究內(nèi)容。首先,對數(shù)控機床進給軸系統(tǒng)進行系統(tǒng)分析,得出選型影響因素,基于此,設(shè)計了主要零部件的選型流程與選型方法,最后得出整體系統(tǒng)選型。然后對安裝潤滑的應(yīng)用因素進行歸納,并提出了安裝潤滑條件下的評價體系以及現(xiàn)有驗證設(shè)備。其次,基于選型分析,首先對速度和負(fù)載進行參數(shù)優(yōu)化,其次對進給軸最重要的滾珠絲杠副和滾動直線導(dǎo)軌副進行選型案例的研究和選型工具的開發(fā)。再者,對絲杠副的不同支撐方式、預(yù)拉伸以及同軸度進行了分析以及試驗驗證。對導(dǎo)軌副最典型平行度偏差進行了受力分析,并模擬論證合理性。對絲杠副來說,選擇正確的支撐方式和預(yù)拉伸長度,保持三點在同一高度上;對導(dǎo)軌副來說,將高度誤差和平行度誤差控制在一定范圍內(nèi),才能最大程度保證使用的可靠性和壽命。最后,結(jié)合赫茲接觸理論和Hamrock-Dowson公式,推導(dǎo)出適用于絲杠副和導(dǎo)軌副的最小油膜厚度計算公式,分析并試驗驗證了潤滑需要合適的油脂量和粘度指標(biāo)。同時,基于Stribeck曲線與潤滑規(guī)律,用試驗證明速度對潤滑應(yīng)用也有影響。并通過正交試驗發(fā)現(xiàn),在實際應(yīng)用中,各種參數(shù)應(yīng)該綜合考慮,并給出了潤滑建議。
[Abstract]:In view of the deficiency of integrated research and guidance on the selection and application of rolling function components of CNC machine tools in China, this paper bases on the users, and aims at a series of processes such as selection, installation, debugging, use and maintenance after the production cycle of the product. Pay attention to the engineering application, step by step, produced the various research contents of this project. First of all, the feeding shaft system of NC machine tool is systematically analyzed, and the factors influencing the selection are obtained. Based on this, the selection process and method of the main parts are designed, and finally the selection of the whole system is obtained. Then, the application factors of installation lubrication are summarized, and the evaluation system under the condition of installation lubrication and the existing verification equipment are put forward. Secondly, based on the analysis of type selection, the parameters of speed and load are optimized firstly, and then the case study and the development of tool for selection of the most important ball screw pair and rolling linear guide rail pair of feed shaft are carried out. Furthermore, the different supporting modes, pretension and coaxiality of the screw pair are analyzed and tested. The stress analysis of the most typical parallelism deviation of the guideway pair is carried out, and the rationality of the simulation is demonstrated. For the lead screw pair, choose the correct support mode and pre-stretch length, and maintain three points at the same height; For the guide rail pair, the height error and the parallelism error are controlled within a certain range, so that the reliability and service life can be guaranteed to the greatest extent. Finally, combined with Hertz contact theory and Hamrock-Dowson formula, a formula for calculating the minimum oil film thickness for the screw and guide pairs is derived, and it is analyzed and tested that proper grease content and viscosity index are required for lubrication. At the same time, based on Stribeck curve and lubrication law, it is proved by experiment that speed also affects lubrication application. Through orthogonal test, it is found that various parameters should be considered comprehensively in practical application, and some lubrication suggestions are given.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG659

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