發(fā)布時間：2018-04-09 00:03

  本文選題：擺動式球磨機　切入點：機械合金化　出處：《吉林大學(xué)》2012年碩士論文

【摘要】：擺動式高能球磨機是一種新型高能高效球磨機。本文從動力學(xué)分析和實驗研究兩個方面論證了擺動式球磨機高球磨效率的顯著優(yōu)點。應(yīng)用齊次坐標變換理論、MATLAB編程、CATIA建模、RecurDyn動力學(xué)仿真軟件進行了動力學(xué)分析，得出擺動式球磨機在空間做八字形運動軌跡的結(jié)論。這種復(fù)雜的空間八字形運動使球磨罐內(nèi)的磨球產(chǎn)生多頻率多強度的碰撞運動，進而使研磨粉體得到更充分快速的研磨。這就克服了以往球磨機平面行星式運動的缺點，使球磨機的運動由平面運動變?yōu)榭臻g運動。 對擺動式球磨機球磨能量進行了理論與實驗分析，發(fā)現(xiàn)研磨粉體接近納米級時產(chǎn)生粉體附著磨球表面致使球磨能量下降的問題。為了解決磨球的粘附現(xiàn)象，本文參考并借鑒行星式球磨機所采用的利用加速度產(chǎn)生的反作用力使粉體顆粒脫離磨球表面的方法。采用變頻控制電動機轉(zhuǎn)速使球磨機按照宏觀正余弦的規(guī)律進行工作，有效避免了在脈沖式調(diào)速方式下，電動機頻繁啟動對電機沖擊大的缺點，同時可以獲得較高的球磨效率。 機械合金化制備Ti_3AlC_2對比實驗，，得出：擺動式球磨機球磨3h后，Ti、Al、C單質(zhì)粉末的衍射峰消失，混合粉末發(fā)生化學(xué)反應(yīng)生成以Ti_3AlC_2(特征峰為2θ＝9.5°)為主晶相，并含有少量TiC的混合粉體（Ti_3AlC_2的含量達到83%）。行星式球磨機在球磨3h后剛開始出現(xiàn)少量Ti_3AlC_2相，但其衍射峰寬度小，強度不高，實際上并沒有產(chǎn)生大量Ti_3AlC_2相，且3h時C單質(zhì)衍射峰還沒有完全消失。實驗說明擺動式球磨機比行星式球磨機具有更高的球磨效率。
[Abstract]:Swing high energy ball mill is a new type of high energy and high efficiency ball mill.In this paper, the remarkable advantages of high ball milling efficiency of swing ball mill are demonstrated from two aspects of dynamic analysis and experimental study.Based on the homogeneous coordinate transformation theory, the CATIA modeling software RecurDyn dynamics simulation software is used to analyze the dynamics, and the conclusion is drawn that the swing ball mill does the octahedral trajectory in space.The complex spatial octahedral motion causes the grinding ball in the ball mill tank to produce multi-frequency and multi-intensity collision motion, which makes the grinding powder more fully and quickly ground.This overcomes the shortcomings of the planar planetary motion of the ball mill in the past and changes the motion of the ball mill from the plane motion to the space motion.The theoretical and experimental analysis of ball milling energy of oscillating ball mill is carried out. It is found that when the grinding powder approaches the nanometer level, the ball milling energy decreases when the powder adheres to the ball surface.In order to solve the adhesion phenomenon of grinding ball, this paper refers to the method used by the planetary ball mill to use the reaction force produced by acceleration to make the powder off the surface of the grinding ball.The frequency conversion control of motor speed makes the ball mill work according to the law of macro sine cosine, which effectively avoids the disadvantages of frequent starting of motor to the motor under pulse speed regulation, and can obtain higher ball milling efficiency at the same time.The comparative experiment of Ti_3AlC_2 prepared by mechanical alloying shows that the diffraction peak of TiAL-C simple powder disappears after milling for 3 h, and Ti3AlC-2 (characteristic peak is 2 胃 ~ 9.5 擄) is the main crystal phase formed by chemical reaction of mixed powder, and the main phase is Ti3AlC2 (characteristic peak is 2 胃 ~ (9.5 擄)).The content of TiS _ 3AlC _ 2 mixed powder containing a small amount of TiC is 83%.A small amount of Ti_3AlC_2 phase appeared in the planetary ball mill only 3 h after milling, but the diffraction peak width was small and the intensity was not high. In fact, no large amount of Ti_3AlC_2 phase was produced, and the C single mass diffraction peak did not disappear completely at 3 h.The experiment shows that the swing ball mill has higher milling efficiency than the planetary ball mill.
【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】：2012
【分類號】：TD453;TH113

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本文編號：1723934