本文關(guān)鍵詞：高速機(jī)床磨削電主軸的結(jié)構(gòu)設(shè)計(jì)及性能分析　出處：《太原理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 高速加工 磨削電主軸 ANSYS 動(dòng)靜態(tài)特性

【摘要】：隨著現(xiàn)代制造技術(shù)的不斷發(fā)展，高速加工技術(shù)的應(yīng)用也越來越廣泛。高速加工是在大幅度提高切削速度的基礎(chǔ)上，以提高生產(chǎn)率、加工精度和加工質(zhì)量為目的的先進(jìn)制造技術(shù)。高速機(jī)床技術(shù)是實(shí)現(xiàn)高速切削的基礎(chǔ)，而高速機(jī)床的核心部件是電主軸，因此為了提高高速機(jī)床的性能，就要深入研究電主軸的性能，掌握電主軸的動(dòng)靜態(tài)特性。 本文以M7130矩臺(tái)平面磨床為實(shí)驗(yàn)平臺(tái)，將磨削電主軸應(yīng)用于該磨床。在現(xiàn)有條件下，對該小型磨削電主軸的內(nèi)部主要結(jié)構(gòu)進(jìn)行分析設(shè)計(jì)和計(jì)算，通過運(yùn)用ANSYS軟件對其初始設(shè)計(jì)值進(jìn)行建模仿真，在此基礎(chǔ)上，對其動(dòng)靜態(tài)特性進(jìn)行了研究分析，并綜合考慮了影響其動(dòng)靜態(tài)特性的各種因素，對今后的電主軸結(jié)構(gòu)的設(shè)計(jì)和結(jié)構(gòu)優(yōu)化提供了一定的參考價(jià)值。具體工作如下： （1）依據(jù)M7130矩臺(tái)平面磨床的結(jié)構(gòu)，對電主軸內(nèi)部的主要結(jié)構(gòu)進(jìn)行分析設(shè)計(jì)，通過對電機(jī)選型、內(nèi)徑設(shè)計(jì)、軸承選型、過盈計(jì)算等，完成對磨削電主軸基本結(jié)構(gòu)的設(shè)計(jì)。 （2）利用ANSYS軟件對主軸轉(zhuǎn)子—軸承系統(tǒng)進(jìn)行二維有限元建模，對電主軸進(jìn)行靜態(tài)特性分析，得出了主軸的靜剛度；分析了不同預(yù)緊力對其靜剛度的影響。 （3）建立了主軸轉(zhuǎn)子—軸承系統(tǒng)的三維有限元模型，對電主軸進(jìn)行了模態(tài)和諧響應(yīng)分析，得出了主軸的各階振型和固頻、臨界轉(zhuǎn)速等；分析了不同的預(yù)緊力對主軸動(dòng)態(tài)特性的影響；并分析了主軸各部分對各階頻率的動(dòng)態(tài)響應(yīng)。 （4）以主軸的靜剛度和前四階固有頻率為目標(biāo)參數(shù)，通過改變不同的軸承位置和內(nèi)徑的大小，得出了前后軸肩的距離以及孔徑同目標(biāo)參數(shù)之間的關(guān)系曲線，定量定性地分析了前后軸承的位置以及孔徑對電主軸的動(dòng)靜態(tài)特性的影響。 通過以上幾個(gè)方面的分析研究，得到了電主軸內(nèi)部主要結(jié)構(gòu)的設(shè)計(jì)方法以及電主軸的動(dòng)靜態(tài)特性參數(shù)。掌握軸內(nèi)徑的大小、前后軸承的位置分布和預(yù)緊力的不同對其動(dòng)靜態(tài)特性的影響，對電主軸應(yīng)用于本實(shí)驗(yàn)平臺(tái)的作用，具有實(shí)際指導(dǎo)意義；對以后電主軸內(nèi)部結(jié)構(gòu)的設(shè)計(jì)優(yōu)化及性能的提高，也有重要的參考價(jià)值。
[Abstract]:With the continuous development of modern manufacturing technology, the application of high speed machining technology is more and more widely. In high speed machining is greatly improved on the basis of cutting speed, to improve the productivity of advanced manufacturing technology, machining precision and quality. For the purpose of high speed machine tool technology is the base of high-speed cutting, and the core component of high-speed machine is the electric spindle, so in order to improve the performance of the high speed machine tool, to further study the performance of motorized spindle, static and dynamic characteristics of master spindle.
In this paper, M7130 surface grinding machine for grinding spindle experimental platform, will be applied to the grinding machine. Under the existing conditions, analyzed the design and calculation of the main structure of the small internal grinding spindle, modeling and simulation by using ANSYS software to design the initial value, on the basis of the dynamic and static characteristics the research and analysis, and considering the various factors that influence the dynamic and static characteristics, provides certain reference value for the design and optimization of spindle structure in the future. The specific work is as follows:
(1) according to the structure of the M7130 surface grinding machine, the main structure of the motorized spindle is analyzed and designed. Through the selection of the motor, the design of the inner diameter, the selection of the bearing and interference calculation, the design of the basic structure of the grinding motorized spindle is completed.
(2) the 2-D finite element modeling of the spindle rotor bearing system is made by ANSYS software. The static characteristics of the spindle are analyzed, and the static stiffness of the spindle is obtained. The influence of different pretightening force on the static stiffness is analyzed.
(3) the establishment of a three-dimensional finite element model of the main shaft of the rotor bearing system of the electric spindle, the modal and harmonic response analysis, the vibration mode and natural frequency of the spindle, and critical speed; analyzes the influence of different preload on the dynamic characteristics of the spindle; and analyzes the dynamic on the frequency. The main shaft of each part of the response.
(4) in the static stiffness and the first four order natural frequency as the objective parameters by changing the bearing position and the size of the inner diameter of the relationship curve between the front and rear axle shoulder distance and aperture with the target parameters are obtained, the influence of the position in the front and back bearing and the radius of the spindle static and dynamic characteristics of quantitative a qualitative analysis.
Through the analysis and Research on the above problems, the static and dynamic characteristics parameter design method of electric spindle inside the main structure and the spindle shaft. Grasp the size of the inner diameter and the position of the bearing preload distribution and different effects on the static and dynamic characteristics of the electric spindle, used in this experimental platform, has practical significance; to design optimization and performance after spindle internal structure improvement, also has important reference value.

【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG580.23

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本文編號：1374154