本文關(guān)鍵詞：芳綸纖維復(fù)合材料超低溫銑削試驗(yàn)研究　出處：《大連理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 芳綸纖維復(fù)合材料 低溫冷卻 銑削 加工質(zhì)量

【摘要】：芳綸纖維復(fù)合材料具有重量輕、比強(qiáng)度大、良好的抗沖擊性和電磁特性等性能,在航空航天、裝甲防護(hù)和武器裝備等領(lǐng)域中得到廣泛應(yīng)用。復(fù)合材料成型后,為滿足使用要求和裝配連接等尺寸精度,機(jī)械加工一般是復(fù)合材料構(gòu)件制造的最后環(huán)節(jié)。然而維復(fù)合材料自身各向異性及不均勻性、高韌性等特點(diǎn),傳統(tǒng)機(jī)械加工過(guò)程中極易產(chǎn)生加工缺陷,致使復(fù)合材料成為典型的難加工材料。芳綸纖維復(fù)合材料高質(zhì)量低損傷加工技術(shù)是成為研究熱點(diǎn)本文分析芳綸纖維復(fù)合材料加工機(jī)理和加工缺陷成因,以芳綸纖維復(fù)合材料低溫性質(zhì)為基礎(chǔ),提出以液氮介質(zhì)冷卻方式對(duì)其進(jìn)行銑削研究,搭建了低溫銑削實(shí)驗(yàn)平臺(tái),在此基礎(chǔ)上,利用金剛石刀具對(duì)芳綸纖維復(fù)合材料開展了銑削力和銑削質(zhì)量等加工試驗(yàn)。本文內(nèi)容包括：(1)根據(jù)芳綸纖維復(fù)合材料機(jī)械加工中存在的缺陷,揭示了加工過(guò)程中切削熱對(duì)其材料性能的影響,通過(guò)研究芳綸纖維復(fù)合材料不同溫度下纖維和樹脂基體的性能,測(cè)量和觀察液氮介質(zhì)冷卻條件下切削溫度和纖維斷裂形態(tài),分析了芳綸纖維復(fù)合材料低溫切削機(jī)理。(2)根據(jù)芳綸纖維復(fù)合材料加工實(shí)驗(yàn)要求,搭建了低溫銑削加工平臺(tái),設(shè)計(jì)了液氮低溫控制管路和內(nèi)噴式刀柄結(jié)構(gòu),針對(duì)不同加工要求分別設(shè)計(jì)了外噴和內(nèi)噴系統(tǒng),標(biāo)定了液氮流量和不同靶距下射流溫度,建立了滿足加工要求的低溫加工系統(tǒng)。(3)開展芳綸纖維復(fù)合材料低溫銑削力試驗(yàn),通過(guò)單因素分析法對(duì)比了液氮冷卻和無(wú)冷卻條件下切削力變化規(guī)律,試驗(yàn)驗(yàn)證了低溫切削可以有效降低銑削力,對(duì)低溫銑削加工工藝進(jìn)行了初步研究和優(yōu)化。(4)通過(guò)對(duì)比不同冷卻條件下芳綸纖維復(fù)合材料銑削質(zhì)量試驗(yàn),驗(yàn)證了液氮冷卻低溫加工可有效提高加工質(zhì)量,分析了不同冷卻溫度下加工表面微觀形貌,研究了冷卻溫度和加工參數(shù)對(duì)加工質(zhì)量的影響。液氮介質(zhì)冷卻有效地提高了芳綸纖維復(fù)合材料加工質(zhì)量,抑制了其加工缺陷,為該材料高質(zhì)量低損傷加工提供了一種可行的方法。
[Abstract]:Aramid fiber composite material has the advantages of light weight, high strength, good impact resistance and electromagnetic properties, widely used in aerospace, weapon and armor protection field. Composite molding, to satisfy the operation requirements and assembly size accuracy, mechanical processing is generally the last link compound the material component manufacturing. However its composite material anisotropy and inhomogeneity, high toughness characteristics, easy to produce processing defects of traditional machining process, the composite material has become a typical difficult to machine materials. The aramid fiber composites with high quality and low damage processing technology is become analysis of the machining mechanism of aramid fiber composites this paper research and processing defects, the low temperature properties of aramid fiber reinforced composites based on their research put forward for milling cooling liquid nitrogen, to build a low The milling temperature experiment platform, based on this, the use of diamond tools to carry out the milling force and milling quality and processing test of aramid fiber composite materials. The contents of this paper include: (1) according to the defects of machining aramid fiber composites, reveals the influence of cutting heat in the process of its material properties, through study on the properties of aramid fiber reinforced composites under different temperature of fiber and resin matrix, measurement and observation of liquid nitrogen cooling conditions, cutting temperature and fiber fracture morphology analysis, low temperature cutting mechanism of aramid fiber composites. (2) according to the requirements of aramid fiber composite material processing experiment, build up cryogenic milling platform design low temperature of liquid nitrogen control pipeline and spray type tool structure, according to different processing requirements are designed to spray and spray system, the calibration of liquid nitrogen flow and different target distance under the jet temperature, Low temperature processing system is built to meet the processing requirements. (3) of aramid fiber composite low temperature milling tests, through single factor method comparative analysis of liquid nitrogen cooling and cutting force without cooling condition changes, test temperature cutting can effectively reduce the milling force, the preliminary research and optimization of low temperature milling process. (4) the aramid fiber composite material milling quality tests under different cooling conditions, verify the liquid nitrogen cooling low-temperature processing can effectively improve the processing quality, analysis of surface micro morphology under different cooling temperature, effects of cooling temperature and machining parameters on machining quality. Liquid nitrogen cooling can effectively improve the aramid fiber composite material processing quality, inhibiting its processing defects, provides a feasible method for the materials with high quality and low damage processing.

【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB332

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本文編號(hào)：1382879