本文選題：鈦合金 + 微織構(gòu)球頭銑刀��； 參考：《哈爾濱理工大學(xué)》2017年碩士論文

【摘要】：鈦合金在航空航天等領(lǐng)域應(yīng)用廣泛但切削性能差,為了實現(xiàn)鈦合金高效、高質(zhì)量的加工,突破刀具技術(shù)及切削工藝的限制已成為先進(jìn)切削技術(shù)研究領(lǐng)域內(nèi)的熱門問題。本文以硬質(zhì)合金微織構(gòu)球頭銑刀為研究對象,將微織構(gòu)置入刀具前刀面,進(jìn)行微織構(gòu)的設(shè)計和制備。建立有限元分析模型,進(jìn)行刀具強(qiáng)度分析,探討微織構(gòu)參數(shù)對刀具強(qiáng)度的影響規(guī)律。系統(tǒng)分析硬質(zhì)合金微織構(gòu)的激光制備技術(shù),搭建實驗平臺,研究微織構(gòu)參數(shù)對刀具切削性能的影響規(guī)律。利用模糊綜合評價理論,定量分析刀具的切削性能。本文對微織構(gòu)球頭銑刀的切削加工性能分析及微織構(gòu)參數(shù)的優(yōu)選,對微織構(gòu)刀具的高效切削及刀具開發(fā)提供基礎(chǔ)數(shù)據(jù)。首先,在球頭銑刀前刀面切削區(qū)域上進(jìn)行微織構(gòu)設(shè)計,利用數(shù)值模擬方法對微織構(gòu)球頭銑刀進(jìn)行強(qiáng)度校核分析,探討不同類型微織構(gòu)參數(shù)對球頭銑刀片結(jié)構(gòu)強(qiáng)度的影響,為后續(xù)的鈦合金銑削仿真和微織構(gòu)參數(shù)優(yōu)選提供依據(jù)。其次,根據(jù)鈦合金銑削的實驗條件,對滿足結(jié)構(gòu)強(qiáng)度的微織構(gòu)球頭銑刀進(jìn)行仿真試驗研究,分析討論不同類型微織構(gòu)參數(shù)對球頭銑刀切削加工性能的影響,并對微織構(gòu)參數(shù)進(jìn)行優(yōu)選。再次,利用激光加工技術(shù)制備微織構(gòu)球頭銑刀,對微織構(gòu)球頭銑刀進(jìn)行鈦合金銑削實驗研究,得到了不同微織構(gòu)參數(shù)對切削力的影響規(guī)律。分析了不同微織構(gòu)球頭銑刀和無織構(gòu)球頭銑刀隨著切削時間下的刀具磨損情況,繪制了刀具磨損與切削力的響應(yīng)特性曲線、刀具磨損與工件表面粗糙度的響應(yīng)特性曲線,得出了仿真優(yōu)選出的微織構(gòu)參數(shù)對球頭銑刀的切削加工性能改善效果明顯。同時,對比仿真結(jié)果和試驗結(jié)果,得出了仿真結(jié)果是準(zhǔn)確可靠的。最后,基于多目標(biāo)決策理論,利用改進(jìn)的層次分析法對球頭銑刀切削加工性能評價指標(biāo)加權(quán)分析。通過鈦合金銑削實驗,依據(jù)最小隸屬度原則,結(jié)合模糊數(shù)學(xué)理論,評價微織構(gòu)球頭銑刀銑削鈦合金的切削加工性能。
[Abstract]:Titanium alloy is widely used in aerospace and other fields, but its cutting performance is poor. In order to achieve high efficiency and high quality machining of titanium alloy, breaking through the limitation of cutting tool technology and cutting technology has become a hot problem in the field of advanced cutting technology.In this paper, the microtexture of cemented carbide microtexture ball end milling cutter was designed and fabricated by inserting the microtexture into the cutting face of the cutting tool.The finite element analysis model was established to analyze the tool strength and the influence of microtexture parameters on the tool strength was discussed.The laser fabrication technology of cemented carbide microtexture was analyzed systematically and the experimental platform was set up to study the influence of microtexture parameters on cutting performance of cutting tools.The cutting performance of cutting tools is quantitatively analyzed by using fuzzy comprehensive evaluation theory.In this paper, the cutting performance of microtextured ball end milling cutter and the selection of microtexture parameters are analyzed, and the basic data are provided for the efficient cutting and tool development of microtexture cutter.Firstly, the microtexture design is carried out on the cutting area of the front face of the ball end milling cutter. The strength of the microtexture milling cutter is checked and analyzed by numerical simulation method, and the influence of different types of microtexture parameters on the structural strength of the ball end milling cutter is discussed.It provides the basis for subsequent simulation of titanium alloy milling and optimization of microtexture parameters.Secondly, according to the experimental conditions of titanium alloy milling, the microtexture ball end milling cutter which meets the structural strength is simulated and studied, and the influence of different microtexture parameters on the cutting performance of the ball end milling cutter is analyzed and discussed.The parameters of microtexture were optimized.Thirdly, the microtexture ball end milling cutter was fabricated by laser processing, and the experimental study of titanium alloy milling was carried out on the micro texture ball end milling cutter, and the effect of different microtexture parameters on the cutting force was obtained.The tool wear of different microtextured ball end milling cutters and non-texture ball end milling cutters with cutting time is analyzed. The response characteristic curves of tool wear and cutting force, tool wear and workpiece surface roughness are drawn.The results show that the microtexture parameters selected by simulation can improve the cutting performance of ball milling cutter obviously.At the same time, compared with the simulation results and experimental results, the simulation results are accurate and reliable.Finally, based on the multi-objective decision theory, an improved analytic hierarchy process (AHP) is used to evaluate the machining performance of ball milling cutter.According to the principle of minimum membership degree and fuzzy mathematics theory, the cutting performance of microtextured ball end milling cutter for titanium alloy milling was evaluated through milling experiment of titanium alloy.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG54

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