【摘要】：隨著科學(xué)技術(shù)的發(fā)展,高檔數(shù)控機(jī)床的性能不斷提高。滾動(dòng)軸承作為高檔數(shù)控機(jī)床進(jìn)給系統(tǒng)廣泛采用的一種支承部件,其靜態(tài)剛度是系統(tǒng)的薄弱環(huán)節(jié),直接影響著機(jī)床整體的動(dòng)、靜力學(xué)性能,因此研究角接觸球軸承的靜態(tài)剛度具有十分重要的意義。因此,為了滿(mǎn)足高檔數(shù)控機(jī)床研制的需要,進(jìn)行軸承的靜態(tài)剛度的研究十分必要。本文對(duì)接觸角為60°的角接觸球軸承的靜態(tài)剛度進(jìn)行了研究。 本文首先介紹了角接觸球軸承的基本結(jié)構(gòu)特點(diǎn),分析了軸承在分別承受軸向、徑向和聯(lián)合載荷下載荷與位移的關(guān)系,并分別建立了軸承軸向和徑向靜態(tài)剛度的測(cè)試模型,并給出計(jì)算公式。 為探究軸承靜態(tài)剛度的變化規(guī)律,獲取真實(shí)有效的基礎(chǔ)數(shù)據(jù),基于軸承靜態(tài)剛度測(cè)試模型與測(cè)試原理,在原有試驗(yàn)臺(tái)上,搭建了軸承靜態(tài)特性參數(shù)測(cè)試系統(tǒng),用于測(cè)試不同規(guī)格的軸承靜態(tài)參數(shù),分析了軸承的接觸角、安裝方式、尺寸大小和所受外載荷的大小等影響因素對(duì)軸承靜態(tài)特性參數(shù)的影響。試驗(yàn)測(cè)試了5組軸承,進(jìn)行了800余次靜態(tài)試驗(yàn),獲得了400余組數(shù)據(jù),通過(guò)數(shù)據(jù)處理,得出了軸承在受到不同軸向力和徑向力的情況下,軸承相應(yīng)的變形規(guī)律和剛度變化規(guī)律,并分析了原因。 對(duì)原有軸承動(dòng)態(tài)特性參數(shù)試驗(yàn)臺(tái)進(jìn)行了改進(jìn)設(shè)計(jì)。改進(jìn)后的試驗(yàn)臺(tái)主要考慮了轉(zhuǎn)速及軸向載荷與徑向載荷對(duì)軸承動(dòng)態(tài)特性的影響,能對(duì)不同型號(hào)軸承進(jìn)行試驗(yàn),具有結(jié)構(gòu)簡(jiǎn)單、通用性強(qiáng)等特點(diǎn),并搭建了改進(jìn)后的軸承動(dòng)態(tài)特性參數(shù)測(cè)試系統(tǒng)。
[Abstract]:With the development of science and technology, the performance of high-grade NC machine tools is improving. As a kind of supporting part widely used in advanced NC machine tool feed system, the static stiffness of rolling bearing is the weak link of the system, which directly affects the dynamic and static performance of the whole machine tool. Therefore, it is of great significance to study the static stiffness of angular contact ball bearings. Therefore, it is necessary to study the static stiffness of bearings in order to meet the needs of the development of high-grade NC machine tools. The static stiffness of angular contact ball bearing with contact angle of 60 擄is studied in this paper. This paper first introduces the basic structural characteristics of angular contact ball bearings, analyzes the relationship between loading load and displacement of bearings under axial, radial and combined loads respectively, and establishes the test models of axial and radial static stiffness of bearings, respectively. The calculation formula is given. In order to investigate the change rule of bearing static stiffness and obtain real and effective basic data, based on the testing model and principle of bearing static stiffness, a testing system of bearing static characteristic parameters was built on the original test bed. This paper is used to test the static parameters of bearings of different specifications, and analyzes the influence factors such as contact angle, installation mode, dimension size and the size of external load on the static characteristic parameters of bearings. Five groups of bearings were tested, more than 800 static tests were carried out, and more than 400 sets of data were obtained. Through data processing, the corresponding deformation and stiffness of bearing were obtained under different axial and radial forces. The reasons are analyzed. The original bearing dynamic characteristic parameter test bed is improved and designed. The improved test bed mainly considers the influence of rotational speed, axial load and radial load on the dynamic characteristics of bearing. It can be used to test different types of bearings, and has the characteristics of simple structure and strong versatility. An improved testing system for bearing dynamic characteristic parameters is also built.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TG659;TH133.3

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