發(fā)布時(shí)間：2018-05-19 23:10

  本文選題：Deform-3D + 正交回歸分析法��； 參考：《蘭州理工大學(xué)》2017年碩士論文

【摘要】：在汽車(chē)制造業(yè)突飛猛進(jìn)的今天,汽車(chē)零部件的生產(chǎn)能力直接影響汽車(chē)產(chǎn)業(yè)的發(fā)展,缸蓋、缸體是發(fā)動(dòng)機(jī)最重要、最核心的零件,因此,發(fā)動(dòng)機(jī)缸體、缸蓋的制造水平對(duì)一個(gè)國(guó)家汽車(chē)制造業(yè)的水平有著至關(guān)重要的作用。在全世界節(jié)能減排的大背景下,汽車(chē)燃油經(jīng)濟(jì)性越來(lái)越受到汽車(chē)制造商的關(guān)注,而全鋁發(fā)動(dòng)機(jī)的應(yīng)用更好地促進(jìn)了汽車(chē)節(jié)能減排的實(shí)現(xiàn)。6061鋁合金以其高抗拉強(qiáng)度、抗腐蝕性和耐疲勞等機(jī)械性能成為理想的結(jié)構(gòu)材料,被廣泛應(yīng)用于汽車(chē)零件、飛機(jī)機(jī)身材料及航空工業(yè)等方面。汽車(chē)發(fā)動(dòng)機(jī)缸體多數(shù)采用鋁合金材料以減輕自重。由于發(fā)動(dòng)機(jī)缸體為密封件,對(duì)缸蓋等表面加工質(zhì)量要求較高,并且判斷切削加工零件表面質(zhì)量的重要指標(biāo)之一是表面粗糙度,所以在實(shí)際生產(chǎn)過(guò)程中,為使零件的加工質(zhì)量能夠達(dá)到工藝要求,需要對(duì)表面粗糙度進(jìn)行預(yù)測(cè),通過(guò)預(yù)測(cè)結(jié)果對(duì)試驗(yàn)進(jìn)行指導(dǎo)。在生產(chǎn)加工過(guò)程中,切削參數(shù)對(duì)加工零件表面粗糙度的影響以及加工效率的提升極為重要,因此篩選合理的切削加工工藝參數(shù)有利于提高加工表面質(zhì)量和加工效率。本文對(duì)6061鋁合金進(jìn)行高速銑削仿真試驗(yàn)、指導(dǎo)實(shí)際加工,并對(duì)分析方法進(jìn)行對(duì)比,對(duì)試驗(yàn)結(jié)果展開(kāi)研究,文章主要研究?jī)?nèi)容以及成果為:(1)利用Matlab和Design-Expert軟件設(shè)計(jì)正交回歸試驗(yàn)方案和二次曲面響應(yīng)試驗(yàn)方案,應(yīng)用Deform-3D軟件建立工件、刀具模型,并對(duì)高速銑削6061鋁合金進(jìn)行仿真分析,觀察表面質(zhì)量及測(cè)量、篩選、計(jì)算表面粗糙度數(shù)值。(2)分別用正交回歸分析法和二次曲面響應(yīng)法兩種分析方法對(duì)表面粗糙度與切削參數(shù)關(guān)系模型進(jìn)行擬合,得到表面粗糙度與切削參數(shù)間的數(shù)值關(guān)系,并對(duì)兩進(jìn)個(gè)模型分別進(jìn)行殘差分析,以及利用方差分析與顯著性檢驗(yàn)對(duì)比兩種分析方法的差異與優(yōu)劣,結(jié)果得出:相比于正交回歸分析法,曲面響應(yīng)法擬合效果更好,具有較高的置信度和實(shí)用性,適用于表面粗糙度的預(yù)測(cè)、優(yōu)化和控制。(3)利用曲面響應(yīng)法分析切削參數(shù)對(duì)表面粗糙度的影響,并結(jié)合材料去除率,在控制加工表面質(zhì)量和加工效率的前提下,得出切削參數(shù)影響表面粗糙度的主次順序以及最優(yōu)組合,最終利用切削加工試驗(yàn)驗(yàn)證上述仿真分析正確性。
[Abstract]:Today, with the rapid development of the automobile manufacturing industry, the production capacity of automobile parts directly affects the development of the automobile industry. Cylinder head and cylinder block are the most important and core parts of the engine. Therefore, the engine cylinder block, Cylinder head manufacturing level plays an important role in a country's automobile manufacturing level. Under the background of energy saving and emission reduction in the world, automobile fuel economy has been paid more and more attention by automobile manufacturers, and the application of all-aluminum engine has better promoted the realization of energy saving and emission reduction of automobile. 6061 aluminum alloy has its high tensile strength. Mechanical properties such as corrosion resistance and fatigue resistance have become ideal structural materials, which are widely used in automotive parts, aircraft fuselage materials and aviation industry. The automobile engine cylinder block mostly uses the aluminum alloy material to reduce the self-weight. Because the engine cylinder block is a sealing part, the machining quality of cylinder head and other surfaces is very high, and one of the important indexes to judge the surface quality of machined parts is the surface roughness, so in the actual production process, In order to make the machining quality of the parts meet the technological requirements, it is necessary to predict the surface roughness and guide the test through the prediction results. In the process of production and processing, the influence of cutting parameters on the surface roughness of machined parts and the improvement of machining efficiency are very important. Therefore, the selection of reasonable cutting process parameters is helpful to improve the quality of machined surface and the efficiency of machining. In this paper, the high speed milling simulation test of 6061 aluminum alloy is carried out to guide the actual machining, and the analysis method is compared, and the experimental results are studied. The main contents and results of this paper are as follows: (1) the orthogonal regression test scheme and Quadric surface response test scheme are designed by using Matlab and Design-Expert software. The workpiece and tool models are established by using Deform-3D software, and the simulation analysis of high speed milling of 6061 aluminum alloy is carried out. Observing the surface quality and measuring, screening, calculating the surface roughness value.) fitting the model of the relationship between the surface roughness and the cutting parameters by the orthogonal regression analysis method and the Quadric surface response method, respectively. The numerical relationship between surface roughness and cutting parameters is obtained, and the residual analysis of the two models is carried out, and the differences and advantages of the two analysis methods are compared by means of variance analysis and significance test. The results show that compared with the orthogonal regression method, the surface response method has better fitting effect, higher confidence and practicability, and is suitable for the prediction of surface roughness. The surface response method is used to analyze the influence of cutting parameters on the surface roughness, and the material removal rate is used to control the surface quality and efficiency. The cutting parameters affect the primary and secondary order and the optimal combination of surface roughness. Finally, the correctness of the simulation analysis is verified by cutting experiments.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TG54

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本文編號(hào)：1912103