本文選題：側(cè)銑削　切入點(diǎn)：C形刃立銑刀　出處：《湖南科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：鈦合金以其比強(qiáng)度高、抗氧化性好、耐蝕性好、耐熱性高等優(yōu)點(diǎn)迅速進(jìn)入航空航天領(lǐng)域并成為主要結(jié)構(gòu)材料之一。但鈦合金又是一種典型的難加工材料,在加工過程中具有導(dǎo)熱率低、化學(xué)活性高、切削力大、刀具易磨損等問題,這必然會(huì)影響加工零件的表面完整性能,進(jìn)而影響鈦合金構(gòu)件的疲勞性能。在鈦合金的加工過程中,刀具幾何參數(shù)對工件的變形、切削力和刀具磨損有重要影響。因此,研究鈦合金銑削過程中刀具的幾何參數(shù)具有重要意義。本文通過側(cè)銑削鈦合金試驗(yàn),對整體硬質(zhì)合金立銑刀幾何參數(shù)展開優(yōu)化設(shè)計(jì)研究。論文主要研究內(nèi)容如下:(1)通過對鈦合金TC4進(jìn)行側(cè)銑削加工,采用正交設(shè)計(jì)方法研究了硬質(zhì)合金立銑刀側(cè)刃幾何參數(shù)對切削力和表面粗糙度的影響,用極差法分析了刀具幾何參數(shù)對銑削力的影響;并以最小表面粗糙度為目標(biāo),采用田口法對刀具幾何參數(shù)進(jìn)行了優(yōu)選。結(jié)果表明:對于主切削力Fy,螺旋角對其影響最大,C形刃角度次之,C形刃寬度的影響最小;當(dāng)選擇螺旋角為25°、C形刃寬度為0.2mm、角度為-25°時(shí)可獲得最小表面粗糙度。(2)將優(yōu)化出的立銑刀與常規(guī)立銑刀進(jìn)行對比實(shí)驗(yàn),分析了兩種立銑刀的銑削力和表面粗糙度,驗(yàn)證了優(yōu)化立銑刀側(cè)銑削TC4的優(yōu)良性能。結(jié)果表明:在相同的加工參數(shù)下,C形刃立銑刀的銑削力和表面粗糙度均要小于常規(guī)立銑刀。(3)研究了銑削速度對C形刃立銑刀和常規(guī)立銑刀的刀具磨損影響。結(jié)果表明:C形刃立銑刀與常規(guī)立銑刀的刀具磨損量都隨銑削速度的增加而增大。在相同速度下,C形刃立銑刀刀具磨損量要低于常規(guī)立銑刀;在銑削相同距離時(shí),C形刃立銑刀的磨損量同樣低于常規(guī)立銑刀。C形刃立銑刀耐用度要高于常規(guī)立銑刀。通過掃描電鏡和能譜分析對后刀面磨損進(jìn)行能譜分析,結(jié)果表明:硬質(zhì)合金立銑刀側(cè)銑削鈦合金的磨損機(jī)理有粘結(jié)磨損、擴(kuò)散磨損和氧化磨損。
[Abstract]:Titanium alloys have rapidly entered the aerospace field and become one of the main structural materials because of their high specific strength, good oxidation resistance, good corrosion resistance and high heat resistance. In the process of machining, problems such as low thermal conductivity, high chemical activity, large cutting force and easy wear of cutting tools will inevitably affect the surface integrity of machined parts and then affect the fatigue properties of titanium alloy components. The geometric parameters of the cutting tool have an important effect on the deformation, cutting force and tool wear of the workpiece. Therefore, it is of great significance to study the geometric parameters of the cutting tool in the milling process of titanium alloy. The optimization design of geometric parameters of monolithic cemented carbide end milling cutters is studied. The main contents of this paper are as follows: (1) side milling of titanium alloy TC4 is carried out. The influence of side edge geometry parameters on cutting force and surface roughness of cemented carbide end milling cutter is studied by orthogonal design method. The influence of cutting tool geometry parameters on milling force is analyzed by the range method, and the minimum surface roughness is taken as the target. The geometric parameters of the cutting tool are optimized by the Taguchi method. The results show that for the main cutting force FY, the helical angle has the least effect on the width of the C-shaped edge, followed by the angle of the C-shaped edge. When the helical angle is 25 擄C edge width is 0.2 mm, and the angle is -25 擄, the minimum surface roughness can be obtained.) the optimized end milling cutter is compared with the conventional end milling cutter, and the milling force and surface roughness of the two kinds of end milling cutters are analyzed. The results show that the milling force and surface roughness of the C edge end milling cutter are lower than that of the conventional end milling cutter under the same machining parameters. The results show that the wear of the end milling cutter with C edge increases with the increase of milling speed, and the wear of the end milling cutter with C edge is lower than that of the conventional end milling cutter at the same speed. When milling at the same distance, the wear amount of C edge end milling cutter is also lower than that of conventional end milling cutter. The wear of the end milling cutter with C edge is higher than that of the conventional end milling cutter. The wear of the rear face is analyzed by energy dispersive microscope and energy spectrum analysis. The results show that the wear mechanism of cemented carbide side milling titanium alloy is adhesive wear, diffusion wear and oxidation wear.
【學(xué)位授予單位】：湖南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG54;TG714

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 孫玉晶;孫杰;李劍峰;;鈦合金銑削加工刀具磨損有限元預(yù)測分析[J];機(jī)械工程學(xué)報(bào);2016年05期

2 姜增輝;于海鷗;王文凱;李玉朋;;PCBN刀具高速車削TC4鈦合金刀具磨損的研究[J];組合機(jī)床與自動(dòng)化加工技術(shù);2015年05期

3 譚靚;張定華;姚倡鋒;任軍學(xué);;刀具幾何參數(shù)對鈦合金銑削力和表面完整性的影響[J];中國機(jī)械工程;2015年06期

4 李陽;盧鳴聲;萬敏;張衛(wèi)紅;;刀具幾何參數(shù)對鈦合金TB6切削力的影響研究[J];工具技術(shù);2014年08期

5 周海波;張京京;閆寒;張素敏;;鈦合金高速銑削刀具磨損機(jī)理和預(yù)測方法研究[J];工具技術(shù);2014年03期

6 曾婧雯;任軍學(xué);尹佳;鄭小偉;;TC18鈦合金銑削刀具幾何參數(shù)優(yōu)化研究[J];航空精密制造技術(shù);2013年06期

7 葉勇;王金彥;;鈦合金的應(yīng)用現(xiàn)狀及加工技術(shù)發(fā)展概況[J];材料導(dǎo)報(bào);2012年S2期

8 祝溪明;;高速切削刀具材料的發(fā)展應(yīng)用研究[J];機(jī)械設(shè)計(jì)與制造;2012年11期

9 劉傳超;;鈦合金TC4高溫動(dòng)態(tài)壓縮力學(xué)行為研究[J];西安航空技術(shù)高等�？茖W(xué)校學(xué)報(bào);2012年03期

10 王洪祥;徐濤;楊嘉;;航空鈦合金銑削過程有限元數(shù)值模擬[J];機(jī)械傳動(dòng);2012年02期

相關(guān)博士學(xué)位論文 前3條

1 范夢超;非圓球頭整體銑刀刃形設(shè)計(jì)制造及其刀具路徑生成算法[D];哈爾濱理工大學(xué);2016年

2 李國超;整體式立銑刀參數(shù)化設(shè)計(jì)與周齒刃磨成形過程建模[D];山東大學(xué);2015年

3 楊曉勇;鈦合金銑削刀具磨損及表面完整性研究[D];天津大學(xué);2013年

相關(guān)碩士學(xué)位論文 前4條

1 曾桂林;薄壁件加工的整體立銑刀結(jié)構(gòu)參數(shù)性能預(yù)測分析[D];西南交通大學(xué);2016年

2 鄭維娟;立銑刀刃口鈍化工藝及其切削性能研究[D];貴州大學(xué);2015年

3 王景平;特殊類型立銑刀參數(shù)化建模及幾何結(jié)構(gòu)參數(shù)研究[D];西南交通大學(xué);2014年

4 王琳琳;硬質(zhì)合金刀具切削鈦合金刀具磨損機(jī)理的試驗(yàn)研究[D];沈陽理工大學(xué);2013年

，

本文編號：1614644