本文選題：摩擦性能 + 硬質(zhì)合金　； 參考：《哈爾濱理工大學(xué)》2016年碩士論文

【摘要】：近年來仿生學(xué)和摩擦學(xué)研究結(jié)果表明,物體具有一定規(guī)則尺寸的形態(tài)表面具有更好的摩擦性能。國內(nèi)外學(xué)者研究發(fā)現(xiàn)高性能的表面微織構(gòu)具有減摩、抗黏附和提高耐磨性能的作用,給刀具加工難加工材料帶來了新的研究方向。針對微織構(gòu)刀具的應(yīng)用和微織構(gòu)刀具切削性能的研究尚處于起步階段,大多集中在車削刀片以及可轉(zhuǎn)位面銑刀片上,其研究內(nèi)容集中在刀具切削性能以及微織構(gòu)減摩機理上,尚未發(fā)現(xiàn)關(guān)于微織構(gòu)優(yōu)化的研究以及將微織構(gòu)應(yīng)用于硬質(zhì)合金球頭銑刀銑削鈦合金的研究。本文主要做如下方面的研究:依據(jù)有限元分析方法,建立硬質(zhì)合金-鈦合金表面摩擦磨損模型,對比分析微織構(gòu)副和光滑副摩擦過程應(yīng)力分布規(guī)律,表明微織構(gòu)具有吸收應(yīng)力的作用,分析不同形式微織構(gòu)摩擦副應(yīng)力分布規(guī)律,獲得改善摩擦性能的最優(yōu)織構(gòu)形式,并進行了試驗驗證。采用激光打標機在硬質(zhì)合金刀具材料表面進行激光加工工藝試驗研究,依據(jù)激光工藝參數(shù)對微織構(gòu)幾何參數(shù)和形貌影響規(guī)律研究,結(jié)合激光加工原理獲得激光制備微織構(gòu)硬質(zhì)合金刀具最佳加工工藝參數(shù)。研究激光加工工藝的基礎(chǔ)上,制備表面微織構(gòu)硬質(zhì)合金試件,采用UMT-2摩擦磨損試驗機,以球-面高副接觸形式研究其摩擦性能,對比分析了光滑表面、微坑織構(gòu)表面、溝槽織構(gòu)表面、交叉溝槽織構(gòu)表面分別在干摩擦和填充固體潤滑劑條件下摩擦性能。分析不同微坑織構(gòu)參數(shù)對摩擦系數(shù)影響規(guī)律以及硬質(zhì)合金微織構(gòu)表面磨損形貌,揭示微坑織構(gòu)減摩機理。依據(jù)試驗數(shù)據(jù)采用正交回歸法構(gòu)建硬質(zhì)合金微織構(gòu)表面摩擦系數(shù)優(yōu)化模型,并對回歸方程系數(shù)進行顯著性檢驗,獲得微織構(gòu)最佳幾何參數(shù);采用漸變式載荷施加方式,對硬質(zhì)合金微織構(gòu)球頭銑刀結(jié)構(gòu)強度進行分析,結(jié)果表明微織構(gòu)置入對硬質(zhì)合金球頭銑刀影響較小;在前期研究基礎(chǔ)上制備硬質(zhì)合金微織構(gòu)球頭銑刀,進行銑削鈦合金試驗,結(jié)果表明微織構(gòu)具有降低硬質(zhì)合金球頭銑刀磨損、延長刀具壽命作用。
[Abstract]:In recent years, the results of bionics and tribology show that the shape surfaces with regular size have better tribological properties. Scholars at home and abroad have found that the high performance surface microtexture has the function of reducing friction, resisting adhesion and improving the wear resistance, which brings a new research direction to the cutting tools. The application of micro-texture cutting tools and the research of cutting performance of micro-texture tools are still in the initial stage, most of them are focused on turning blades and indexable face milling cutters, and the research focuses on the cutting performance of cutting tools and the friction reduction mechanism of micro-texture tools. The research on the optimization of microtexture and the application of microtexture to the milling of titanium alloy with cemented carbide ball end milling cutter have not been found. According to the finite element analysis method, the friction and wear model of cemented carbid-titanium alloy surface is established, and the stress distribution in the friction process of microtexture pair and smooth pair is compared and analyzed. It is shown that microtexture has the function of absorbing stress. The distribution of stress in friction pairs of different forms of microtextures is analyzed and the optimum texture form to improve the friction performance is obtained and verified by experiments. The laser machining process on the surface of cemented carbide cutting tools was studied by laser marking machine. The influence of laser process parameters on the geometric parameters and morphology of microtexture was studied. According to the principle of laser machining, the optimum processing parameters of microtexture cemented carbide tools prepared by laser are obtained. Based on the study of laser processing technology, the surface microtextured cemented carbide specimens were prepared. The friction and wear properties of the specimens were studied by using UMT-2 friction and wear tester. The smooth surface and the micropit texture surface were compared and analyzed. The friction properties of grooved texture surface and cross groove texture surface are respectively under dry friction and filling solid lubricant. The effects of different parameters of microcrater texture on friction coefficient and wear morphology of cemented carbide microtexture were analyzed to reveal the mechanism of friction reduction of microcrater texture. According to the test data, the optimum model of friction coefficient of cemented carbide microtexture surface is constructed by orthogonal regression method, and the coefficient of regression equation is tested significantly to obtain the best geometric parameters of microtexture. The structural strength of cemented carbide microtextured ball end milling cutters is analyzed. The results show that microtexture placement has little effect on cemented carbide ball end milling cutters. The results show that the microtexture can reduce the wear of cemented carbide ball end milling cutter and prolong the tool life.
【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】：2016
【分類號】：TG714

【引證文獻】

相關(guān)碩士學(xué)位論文 前2條

1 張磊;硬質(zhì)合金球頭銑刀介觀幾何特征參數(shù)優(yōu)化[D];哈爾濱理工大學(xué);2017年

2 王煥焱;微織構(gòu)球頭銑刀銑削鈦合金切削加工性能的研究[D];哈爾濱理工大學(xué);2017年

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本文編號：1831511