本文選題：巨電流變效應(yīng)　切入點：流變性能　出處：《吉林大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：巨電流變拋光液是由高介電常數(shù)的納米顆粒、二甲基硅油以及磨料顆�；旌隙傻慕^緣懸浮液。在外加電場的作用下會產(chǎn)生巨電流變效應(yīng)，巨電流變拋光液中的固相顆粒在極化力的作用下會沿著電場線的方向形成鏈狀結(jié)構(gòu)，，使得拋光液的粘度和剪切屈服應(yīng)力有顯著的增長。巨電流變拋光技術(shù)正是應(yīng)用巨電流變拋光液在電場作用下這一特殊性質(zhì)來對工件表面進行加工的一種非接觸式拋光方法，對于導(dǎo)體和非導(dǎo)體工件均適用。 對巨電流變拋光液微觀結(jié)構(gòu)的觀察有助于了解在外加電場作用下巨電流變拋光液中固相顆粒的運動及成鏈情況，并能夠更好的理解巨電流變效應(yīng)的機理。通過觀察發(fā)現(xiàn)，與電流變效應(yīng)相比，巨電流變效應(yīng)所產(chǎn)生的鏈狀結(jié)構(gòu)纖維更加細(xì)密，效應(yīng)更加明顯。這也是巨電流變液的剪切屈服強度能達(dá)到普通電流變液剪切屈服強度十倍以上的原因。 巨電流變拋光液的流變學(xué)性能對巨電流變拋光工藝來說是一個非常重要的影響因素。而衡量巨電流變拋光液流變性能的兩個主要因素是其在外電場作用下的表觀粘度及剪切屈服應(yīng)力值。本文中使用自制的圓筒式旋轉(zhuǎn)流變儀從磨料的種類、磨料的粒度、磨料的濃度等不同影響因素的角度對巨電流變拋光液的粘度及剪切屈服應(yīng)力進行實驗研究，找出不同影響因素對巨電流變拋光液流變性能的影響，并得出相應(yīng)的結(jié)論，同時也為巨電流變拋光實驗提供充足的理論依據(jù)。 區(qū)別于傳統(tǒng)拋光實驗中所使用的針狀電極，本次實驗中的五軸聯(lián)動巨電流變拋光機床使用的是可拆式集成環(huán)狀電極拋光工具。通過對外加電場作用下集成環(huán)狀拋光工具進行電場強度仿真和對拋光工具前端所形成的巨電流變?nèi)嵝話伖忸^有效拋光區(qū)域?qū)嶒�，驗證了該集成環(huán)狀拋光工具可被用于巨電流變拋光實驗中。 本文中使用五軸聯(lián)動巨電流變拋光機床對光學(xué)玻璃進行了一系列巨電流變拋光實驗,探究了磨料的種類、濃度、粒度，以及拋光電壓、拋光間隙、拋光時間、電機轉(zhuǎn)速等多個因素對巨電流變拋光工件表面粗糙度的影響，并找出了各自的變化規(guī)律，得到了拋光光學(xué)玻璃合理的工藝參數(shù)。應(yīng)用這些經(jīng)過優(yōu)化后的參數(shù)進行巨電流變拋光實驗，得到了滿意的實驗結(jié)果。
[Abstract]:Giant electrorheological polishing fluid is an insulating suspension composed of high dielectric constant nanoparticles, dimethyl silicon oil and abrasive particles. Under the action of an external electric field, a giant electrorheological effect is produced. The solid particles in the giant electrorheological polishing liquid will form chain structure along the direction of the electric field line under the action of polarization force. The viscosity and shear yield stress of the polishing fluid have been greatly increased. The giant electrorheological polishing technology is a non-contact polishing method which uses the special property of giant electrorheological polishing fluid under the action of electric field to process the workpiece surface. Applicable to both conductor and non-conductor workpiece. The observation of the microstructure of the giant electrorheological polishing liquid is helpful to understand the motion and chain formation of solid particles in the giant electrorheological polishing liquid under the action of an applied electric field, and to better understand the mechanism of the giant electrorheological effect. Compared with the electrorheological effect, the chain structure fiber produced by the giant electrorheological effect is finer and the effect is more obvious, which is the reason why the shear yield strength of the giant electrorheological fluid is more than ten times that of the common ER fluid. The rheological properties of giant electrorheological polishing fluids are a very important factor in the polishing process of giant electrorheological fluids, and the two main factors to measure the rheological properties of giant electrorheological polishing fluids are the external electric field. Apparent viscosity and shear yield stress. In this paper, the self-made cylindrical rotary rheometer is used from the type of abrasive, The viscosity and shear yield stress of giant electrorheological polishing fluid were experimentally studied from the angle of different influencing factors such as abrasive particle size and abrasive concentration, and the effects of different factors on rheological properties of giant electrorheological polishing fluid were found out. At the same time, it provides sufficient theoretical basis for the experiment of giant electrorheological polishing. Different from the needle electrodes used in traditional polishing experiments, The five-axis linkage giant electrorheological polishing machine tool is a detachable integrated annular electrode polishing tool. The electric field intensity simulation and the front end of the polishing tool are carried out for the integrated ring polishing tool under the action of external electric field. Experimental study on the effective polishing area of the large electrorheological flexible polishing head, It is verified that the integrated annular polishing tool can be used in the experiment of giant electrorheological polishing. In this paper, a series of experiments of giant electrorheological polishing of optical glass are carried out by using a five-axis linkage giant electrorheological polishing machine. The types, concentration, particle size, polishing voltage, polishing gap and polishing time of abrasive are investigated. The influence of many factors, such as motor speed, on the surface roughness of the workpiece polished by giant electrorheological change was found out. Reasonable process parameters of polished optical glass are obtained, and the optimized parameters are applied to the experiment of giant electrorheological polishing, and satisfactory experimental results are obtained.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG580.692

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 王承遇;李松基;陶瑛;張咸貴;齊濟;;超光滑超精密玻璃拋光新技術(shù)[J];玻璃;2009年10期

2 曹鳳國,張勤儉;超聲加工技術(shù)的研究現(xiàn)狀及其發(fā)展趨勢[J];電加工與模具;2005年S1期

3 彭小強,戴一帆,李圣怡,尤偉偉;回轉(zhuǎn)對稱非球面光學(xué)零件磁流變成形拋光的駐留時間算法[J];國防科技大學(xué)學(xué)報;2004年03期

4 黃俊,趙宏聲,姜德生,袁潤章;電流變液和磁流變液及其應(yīng)用[J];國外建材科技;1996年03期

5 張峰,余景池,張學(xué)軍,王權(quán)陡;磁流變拋光技術(shù)[J];光學(xué)精密工程;1999年05期

6 張峰,張斌智;磁流體輔助拋光工件表面粗糙度研究[J];光學(xué)精密工程;2005年01期

7 方慧,郭培基,余景池;液體噴射拋光材料去除機理的研究[J];光學(xué)技術(shù);2004年02期

8 方慧,郭培基,余景池;液體噴射拋光時各工藝參數(shù)對材料去除量的影響[J];光學(xué)技術(shù);2004年04期

9 李金,張華良;磁流變液研究和應(yīng)用[J];上海大學(xué)學(xué)報(自然科學(xué)版);2004年01期

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