【摘要】：磨粒有序排布的單層釬焊CBN砂輪(以下簡稱單層有序CBN砂輪)因具有優(yōu)異的磨削性能而在航空航天難加工材料的高效磨削加工領(lǐng)域具有廣闊應(yīng)用前景。前期磨削機(jī)理研究已經(jīng)發(fā)現(xiàn),單顆磨粒最大未變形切屑厚度(以下簡稱單顆磨粒切厚)會影響磨削力、磨削溫度、砂輪壽命、磨削表面質(zhì)量等。由于以往研究通常是假定砂輪表面每顆磨粒的切厚都相同,所以難以精確預(yù)測磨削加工結(jié)果。原因在于,砂輪實際工作面上由于不同磨粒之間的形態(tài)、出露高度等差異,導(dǎo)致不同磨粒在磨削過程中的單顆磨粒切厚并不相同,有時甚至具有較大差異。因此,本文從精確表征單層有序CBN砂輪工作面狀態(tài)出發(fā),建立單顆磨粒切厚分布模型,并分析切厚分布特征對磨削加工過程的影響,為準(zhǔn)確預(yù)測磨削結(jié)果提供科學(xué)依據(jù)和基礎(chǔ)數(shù)據(jù)。本文完成的主要研究工作及取得的結(jié)果如下:(1)提出采用復(fù)型法測量單層有序CBN砂輪的工作面形貌數(shù)據(jù),并運(yùn)用50×1047的矩陣描述砂輪工作面上每顆磨粒的出露高度和所處位置,由此實現(xiàn)對單層有序CBN砂輪工作面的精確表征。建立了單顆磨粒切厚分布計算公式,并根據(jù)單層有序CBN砂輪工作面地貌數(shù)據(jù)獲得了單顆磨粒切厚分布特征(包括平均值與標(biāo)準(zhǔn)差)。(2)制作了單層有序CBN砂輪,并以GH4169鎳基高溫合金為加工對象開展了砂輪磨削磨損試驗,闡明了砂輪工作面狀態(tài)的演變規(guī)律,發(fā)現(xiàn)了砂輪磨損和磨削參數(shù)對單顆磨粒切厚分布特征的影響規(guī)律,為優(yōu)化磨削工藝參數(shù)以調(diào)控單顆磨粒切厚分布特征提供了理論依據(jù)和基礎(chǔ)數(shù)據(jù)。(3)通過磨削實驗揭示了砂輪工作面狀態(tài)對磨削力、磨削溫度、磨削比能等過程參量、以及磨削表面粗糙度的影響規(guī)律,由此建立了單顆磨粒切厚分布特征與磨削過程參量及加工結(jié)果的關(guān)系模型,并進(jìn)行了實驗驗證,發(fā)現(xiàn)誤差可控制在10%以內(nèi)。
[Abstract]:Single layer brazed CBN grinding wheel (hereinafter referred to as monolayer ordered CBN grinding wheel) has a broad application prospect in the field of high efficiency grinding of aerospace materials due to its excellent grinding performance. Previous research on grinding mechanism has found that the maximum undeformed chip thickness of single abrasive particle (hereinafter referred to as single abrasive particle thickness) will affect grinding force, grinding temperature, grinding wheel life, grinding surface quality and so on. It is difficult to predict the grinding results precisely because of the assumption that the cutting thickness of each abrasive particle on the surface of grinding wheel is the same. The reason lies in the fact that the cutting thickness of single abrasive grain in grinding process is different and sometimes even has great difference due to the difference of the shape and height of different abrasive particles in the actual working face of grinding wheel. Therefore, in order to accurately characterize the working face of single-layer ordered CBN grinding wheel, a single grain thickness distribution model is established in this paper, and the influence of cutting thickness distribution on grinding process is analyzed. It provides scientific basis and basic data for accurate prediction of grinding results. The main research work and the results obtained in this paper are as follows: (1) A compound method is proposed to measure the face morphology data of single-layer ordered CBN grinding wheel. A matrix of 50 脳 1047 is used to describe the exposed height and location of each abrasive particle in the grinding wheel face, and thus the precise representation of the single-layer ordered CBN grinding wheel face is realized. A formula for calculating the thickness distribution of a single abrasive particle is established. According to the geomorphological data of the single-layer ordered CBN grinding wheel face, the distribution characteristics of the single abrasive particle thickness distribution (including average value and standard deviation). (_ 2) are obtained, and the single-layer ordered CBN grinding wheel is made. The grinding wheel wear test was carried out with GH4169 nickel base superalloy as the processing object, the evolution law of grinding wheel working face state was clarified, and the influence of grinding wheel wear and grinding parameters on the distribution characteristics of single grain cutting thickness was found. The theoretical basis and basic data are provided for optimizing the grinding process parameters to control the distribution characteristics of single abrasive particle thickness. (3) through grinding experiments, the process parameters such as grinding force, grinding temperature and grinding specific energy of grinding wheel working face are revealed. Based on the influence of grinding surface roughness, the relationship between the distribution of single grain thickness and grinding process parameters and machining results is established. The experimental results show that the error can be controlled within 10%.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG580.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王娟娟;趙聞蕾;王興強(qiáng);靳小釗;;基于Johnson分布直接轉(zhuǎn)換法的風(fēng)速預(yù)測[J];電力自動化設(shè)備;2014年06期

2 馬占龍;王高文;張健;谷勇強(qiáng);代雷;彭利榮;;基于有限元及神經(jīng)網(wǎng)絡(luò)的磨削溫度仿真預(yù)測[J];電子測量與儀器學(xué)報;2013年11期

3 宿崇;施志輝;劉元偉;;陶瓷CBN砂輪地貌建模與磨削仿真[J];中國機(jī)械工程;2012年14期

4 李峰;蘇宏華;丁文鋒;張志偉;;電鍍cBN砂輪高速磨削高溫合金的砂輪磨損研究[J];金剛石與磨料磨具工程;2011年06期

5 錢源;徐九華;傅玉燦;田霖;;cBN砂輪高速磨削鎳基高溫合金磨削力與比磨削能研究[J];金剛石與磨料磨具工程;2011年06期

6 張偉文;郭鋼;黃云;黃智;;納米磨削磨屑形成分子動力學(xué)仿真研究[J];中國機(jī)械工程;2011年02期

7 吳寶海;張瑩;羅明;齊國寧;;高效加工技術(shù)在航空發(fā)動機(jī)制造領(lǐng)域的發(fā)展和應(yīng)用[J];航空制造技術(shù);2010年21期

8 陳東祥;田延嶺;;超精密磨削加工表面形貌建模與仿真方法[J];機(jī)械工程學(xué)報;2010年13期

9 張紅霞;陳五一;陳志同;;SG砂輪磨削鈦合金燒傷機(jī)理[J];北京航空航天大學(xué)學(xué)報;2008年01期

10 陳勇平;唐進(jìn)元;;磨削加工中的尺寸效應(yīng)機(jī)理研究[J];中國機(jī)械工程;2007年17期

相關(guān)博士學(xué)位論文 前3條

1 張曉紅;凸輪軸數(shù)控磨削工藝智能專家系統(tǒng)的研究及軟件開發(fā)[D];湖南大學(xué);2010年

2 言蘭;基于單顆磨粒切削的淬硬模具鋼磨削機(jī)理研究[D];湖南大學(xué);2010年

3 張小鋒;關(guān)于砂輪地貌雙目視覺檢測技術(shù)的基礎(chǔ)研究[D];南京航空航天大學(xué);2007年

相關(guān)碩士學(xué)位論文 前4條

1 錢源;高速磨削用單層釬焊立方氮化硼砂輪地貌建模與試驗研究[D];南京航空航天大學(xué);2012年

2 童圣亭;單層釬焊CBN砂輪成型磨削鈦合金的研究[D];南京航空航天大學(xué);2007年

3 程文濤;基于神經(jīng)網(wǎng)絡(luò)的成形磨削表面粗糙度研究[D];湖南大學(xué);2006年

4 劉彬;基于本體論的軸承套圈磨削質(zhì)量分析及其知識庫系統(tǒng)的研究[D];浙江大學(xué);2004年

，

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