本文選題：精密轉(zhuǎn)臺(tái) + 關(guān)鍵部件��； 參考：《西安理工大學(xué)》2017年碩士論文

【摘要】：隨著制造業(yè)朝著高效高能方向發(fā)展,對(duì)精密數(shù)控機(jī)床的要求也越來(lái)越高。目前國(guó)內(nèi)外多項(xiàng)精密制造技術(shù)的進(jìn)展都需要有高端機(jī)床在制造方面的強(qiáng)有力的支持,例如對(duì)面型精度要求很高的光學(xué)鏡片。數(shù)控轉(zhuǎn)臺(tái)作為數(shù)控機(jī)床的重要組成部分,同時(shí)起著帶動(dòng)工件旋轉(zhuǎn)和支撐工件的作用。目前數(shù)控轉(zhuǎn)臺(tái)的設(shè)計(jì)、制造及測(cè)試技術(shù)亟待提升,為此,本文進(jìn)行精密轉(zhuǎn)臺(tái)關(guān)鍵部件設(shè)計(jì)與試驗(yàn)研究,主要工作和成果如下:(1)完成了轉(zhuǎn)臺(tái)結(jié)構(gòu)的總體方案設(shè)計(jì)。設(shè)計(jì)的轉(zhuǎn)臺(tái)臺(tái)面直徑為1000mm,最大工作轉(zhuǎn)速為50r/min。對(duì)3種轉(zhuǎn)臺(tái)支承方案進(jìn)行了對(duì)比分析,確定電機(jī)后置式方案為本文最終的支承方案。對(duì)轉(zhuǎn)臺(tái)的主要關(guān)鍵部件進(jìn)行了設(shè)計(jì)及選型,包括轉(zhuǎn)軸的參數(shù)校核,軸系總體結(jié)構(gòu)設(shè)計(jì),電機(jī)和編碼器的選型。(2)設(shè)計(jì)了轉(zhuǎn)臺(tái)徑向和推力靜壓軸承的結(jié)構(gòu),計(jì)算了軸承的靜動(dòng)態(tài)性能,并對(duì)關(guān)鍵參數(shù)進(jìn)行了優(yōu)化。徑向靜壓軸承為帶回油槽的四腔結(jié)構(gòu),推力軸承為雙面八油墊結(jié)構(gòu),均采用小孔節(jié)流器。計(jì)算的性能參數(shù)包括流量、摩擦功耗、溫升和油膜剛度等;分析了關(guān)鍵設(shè)計(jì)參數(shù)對(duì)軸承性能的影響關(guān)系,并根據(jù)油膜剛度的設(shè)計(jì)要求確定了軸承的半徑間隙和節(jié)流孔的直徑。(3)通過(guò)試驗(yàn)完成了軸承和轉(zhuǎn)子配副材料的選配。針對(duì)精密機(jī)床靜壓轉(zhuǎn)臺(tái)軸承-轉(zhuǎn)子摩擦副的使用工況,獲得了 4組軸承-轉(zhuǎn)子摩擦副的材料選型方案,進(jìn)行了摩擦磨損試驗(yàn)及潤(rùn)滑汕粘-溫特性試驗(yàn),通過(guò)試驗(yàn)結(jié)果的對(duì)比分析和評(píng)價(jià),分別獲得了一組合適的軸承-轉(zhuǎn)子摩擦副材料方案。(4)進(jìn)行了靜壓轉(zhuǎn)臺(tái)精度測(cè)試。在所設(shè)計(jì)的試驗(yàn)臺(tái)上進(jìn)行精度測(cè)試,包括轉(zhuǎn)臺(tái)的徑向回轉(zhuǎn)精度和軸向回轉(zhuǎn)精度,測(cè)得徑向精度約為0.12μm,軸向精度約為0.0μm。本文在梊壓軸承的設(shè)計(jì)分析及試驗(yàn)方面的研究可為精密機(jī)床轉(zhuǎn)臺(tái)的應(yīng)用提供一定的參考價(jià)值。
[Abstract]:With the development of manufacturing industry in the direction of high efficiency and high energy, the requirement of precision NC machine tools is becoming higher and higher. At present, the development of many precision manufacturing technologies at home and abroad requires strong support from high-end machine tools, such as optical lenses that require high surface precision. As an important part of NC machine tool, CNC turntable plays the role of driving workpiece rotation and supporting workpiece. At present, the design, manufacture and testing technology of the CNC turntable need to be improved urgently. Therefore, the key components of the precision turntable are designed and tested. The main work and results are as follows: (1) the overall scheme design of the turntable structure is completed. The designed turntable has a diameter of 1000 mm and a maximum rotation speed of 50 r / min. Three kinds of turntable supporting schemes are compared and analyzed, and the final supporting scheme of this paper is determined. The main key components of the turntable are designed and selected, including the parameter checking of the rotary shaft, the design of the overall structure of the shaft system, the selection of the motor and the encoder. (2) the structure of the radial and thrust hydrostatic bearing of the turntable is designed. The static and dynamic performance of the bearing is calculated and the key parameters are optimized. The radial hydrostatic bearing is a four-cavity structure which is brought back to the oil tank, and the thrust bearing is a double-sided eight oil cushion structure, and the orifice throttle is used. The calculated performance parameters include flow rate, friction power consumption, temperature rise and oil film stiffness. According to the design requirements of oil film stiffness, the radius clearance of bearing and the diameter of throttle hole are determined. (3) the selection of bearing and rotor pair materials is completed by experiment. According to the working condition of bearing rotor friction pair of precision machine tool, four material selection schemes of bearing rotor friction pair are obtained, friction and wear test and lubricating Shantou temperature characteristic test are carried out. Through the comparison and evaluation of the test results, a group of suitable material schemes for the bearing-rotor friction pair are obtained. (4) the accuracy test of the hydrostatic rotary table is carried out. The precision test is carried out on the designed test bench, including the radial and axial rotary accuracy of the turntable. The radial accuracy is about 0.12 渭 m, and the axial precision is about 0.0 渭 m. In this paper, the design, analysis and test of the bearing can provide some reference value for the application of precision machine tool turntable.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG502.1

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