本文選題：旋轉(zhuǎn)超聲端面銑削 + 石英玻璃　； 參考：《中北大學(xué)》2017年碩士論文

【摘要】：石英玻璃具有耐高溫、膨脹系數(shù)低、耐熱震性、高化學(xué)穩(wěn)定性等優(yōu)異性能,廣泛應(yīng)用于化工、電子、冶金以及國防等工業(yè)領(lǐng)域,但由于石英玻璃的物理機械性能尤其是韌性和強度與金屬材料相比有很大差異,在加工時材料承受的載荷很容易超過材料的屈服極限而發(fā)生斷裂破壞,因此,采用傳統(tǒng)加工方式不但加工效率低,而且伴隨著刀具磨損嚴重、破碎崩邊等問題。旋轉(zhuǎn)超聲加工以其卓越的加工能力可為此類硬脆材料高效去除加工提供有效的解決方案。本文分別從材料行為、裂紋擴展方式、刀具磨粒運動學(xué)建模與軌跡仿真以及工藝參數(shù)影響規(guī)律等四個方面對石英玻璃的高頻旋轉(zhuǎn)超聲銑削工藝規(guī)律與材料去除機理進行討論與分析。論文的主要工作主要從以下幾個方面展開:(1)基于ANSYS/LS-DYNA有限元仿真平臺,對石英玻璃旋轉(zhuǎn)超聲銑削過程進行了建模仿真,分析了材料去除過程中刀-工作用區(qū)應(yīng)力場分布特性,研究了金剛石刀具高頻往復(fù)沖擊時復(fù)合作用導(dǎo)致的裂紋萌生與擴展,闡明了材料去除機理。(2)通過MATLAB軟件對進給速度、主軸轉(zhuǎn)速以及超聲振動頻率對刀具端面磨粒空間三維運動軌跡的影響規(guī)律進行運動學(xué)模擬,從理論上分析了超聲激勵作用對刀具磨粒速度以及加速度的影響規(guī)律,描述了金剛石磨粒運動學(xué)、動力學(xué)特征及其與待去除材料的交互作用特點。(3)通過納米壓痕實驗和劃痕試驗研究了石英玻璃在連續(xù)線性載荷控制和深度控制下的石英玻璃材料形貌變化過程,獲得了石英玻璃納米壓痕載荷深度曲線以及彈-塑-脆三態(tài)變化的深度、載荷、聲學(xué)信號曲線,并總結(jié)了石英玻璃微觀材料去除規(guī)律以及彈-塑和脆-塑變化的臨界載荷和臨界切削深度。(4)對石英玻璃旋轉(zhuǎn)超聲端面銑削工藝參數(shù)影響規(guī)律進行了試驗分析,研究了進給速度、主軸轉(zhuǎn)速、切削寬度以及切削深度對加工表面質(zhì)量的影響規(guī)律與機理,并將傳統(tǒng)端面銑削的工藝效果同旋轉(zhuǎn)超聲端面銑削進行對比,并將超聲振幅對實際切削深度的影響程度進行了理論分析與試驗驗證。
[Abstract]:Quartz glass has excellent properties such as high temperature resistance, low expansion coefficient, heat resistance and shock resistance, high chemical stability and so on. It is widely used in chemical, electronic, metallurgical and national defense industries.However, because the physical and mechanical properties of quartz glass, especially its toughness and strength, are quite different from those of metallic materials, it is easy for the material to bear the load beyond the yield limit of the material during processing and to fracture.The traditional machining method is not only inefficient, but also accompanied by serious tool wear and breakage.Rotary ultrasonic machining with its excellent processing ability can provide an effective solution for the high efficiency removal of hard and brittle materials.In this paper, the material behavior, crack propagation mode,The kinematics modeling and trajectory simulation of cutting tools and the influence of process parameters on the cutting process of quartz glass by rotating ultrasonic milling are discussed and analyzed in this paper.Based on ANSYS/LS-DYNA finite element simulation platform, this paper models and simulates the rotary ultrasonic milling process of quartz glass, and analyzes the stress field distribution characteristics of the cutter and working area in the process of material removal, the main work of this paper is as follows: (1) based on the ANSYS/LS-DYNA finite element simulation platform, the rotary ultrasonic milling process of quartz glass is modeled and simulated.The crack initiation and propagation caused by high frequency reciprocating impact of diamond cutting tools are studied, and the material removal mechanism. 2) feeding speed is explained by MATLAB software.The effect of spindle speed and ultrasonic vibration frequency on the three-dimensional motion trajectory of tool surface abrasive particles is simulated by kinematics. The influence of ultrasonic excitation on the velocity and acceleration of tool wear particles is analyzed theoretically.The kinematics of diamond abrasive particles is described.Kinetic characteristics and its interaction with the material to be removed. The morphology of quartz glass under continuous linear load and depth control was studied by nano-indentation test and scratch test.The depth curve of nano-indentation load, the depth, load and acoustic signal curves of elastic-plastic brittle three-state change were obtained.The effects of critical load and critical cutting depth of elastic-plastic and brittle-plastic variation on the parameters of rotary ultrasonic end-milling of quartz glass were analyzed and the feed rate was studied. The removal rule of quartz glass microcosmic material and the critical load and critical cutting depth of elastic-plastic and brittle-plastic variation were also summarized.The influence law and mechanism of spindle speed, cutting width and cutting depth on the quality of machined surface are discussed. The effect of traditional end milling is compared with that of rotary ultrasonic end milling.The influence of ultrasonic amplitude on the actual cutting depth is theoretically analyzed and tested.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ171.683

【參考文獻】

相關(guān)期刊論文 前10條

1 舒晨;李新和;卜佳南;胡興佳;;超聲磨粒沖擊加工去除模型建立與仿真[J];機械科學(xué)與技術(shù);2015年09期

2 雷敬文;秦娜;胡智特;劉凡;;基于刀具-工件接觸率的固結(jié)磨粒旋轉(zhuǎn)超聲加工的工具受力分析[J];機械;2015年05期

3 周紅偉;谷美林;魏智;張建華;;超聲振動輔助微銑削石英玻璃銑削力的研究[J];工具技術(shù);2014年05期

4 房豐洲;倪皓;宮虎;;硬脆材料的旋轉(zhuǎn)超聲輔助加工[J];納米技術(shù)與精密工程;2014年03期

5 呂東喜;王洪祥;唐永健;黃燕華;張海軍;;旋轉(zhuǎn)超聲加工中磨粒沖擊作用的仿真分析[J];哈爾濱工業(yè)大學(xué)學(xué)報;2013年03期

6 董穎懷;張曉鋒;房豐洲;仇中軍;宮虎;;硬脆材料超聲輔助復(fù)合加工機床及其工藝研究[J];華中科技大學(xué)學(xué)報(自然科學(xué)版);2012年S2期

7 張承龍;馮平法;張建富;;光學(xué)玻璃旋轉(zhuǎn)超聲端面銑削表面特性[J];清華大學(xué)學(xué)報(自然科學(xué)版);2012年11期

8 卞平艷;趙波;李瑜;;超聲激勵下單顆磨粒斷續(xù)切削邊界研究[J];制造技術(shù)與機床;2012年11期

9 康仁科;馬付建;董志剛;郭東明;;難加工材料超聲輔助切削加工技術(shù)[J];航空制造技術(shù);2012年16期

10 肖強;李言;李淑娟;;超聲復(fù)合研磨光學(xué)玻璃機理及表面特征[J];宇航材料工藝;2011年04期

相關(guān)博士學(xué)位論文 前2條

1 呂東喜;硬脆材料旋轉(zhuǎn)超聲加工高頻振動效應(yīng)的研究[D];哈爾濱工業(yè)大學(xué);2014年

2 鄭書友;旋轉(zhuǎn)超聲加工機床的研制及實驗研究[D];華僑大學(xué);2008年

相關(guān)碩士學(xué)位論文 前4條

1 孟彬彬;光學(xué)玻璃磨削裂紋形成過程仿真及試驗研究[D];哈爾濱工業(yè)大學(xué);2011年

2 陳娟烈;旋轉(zhuǎn)超聲波加工機理的有限元分析[D];太原理工大學(xué);2011年

3 李同輝;硬脆材料塑性銑削過程研究[D];河北工業(yè)大學(xué);2011年

4 楊智勇;光學(xué)玻璃超聲振動切削脆塑轉(zhuǎn)變臨界條件的研究[D];哈爾濱工業(yè)大學(xué);2006年

，

本文編號：1742673