【正文】 本科畢業(yè)設(shè)計CA6140 車床后托架加工工藝及夾具設(shè)計學生姓名： 齊峰學生學號： 080514020510 院 （系）： 機械工程學院 年級專業(yè)： 機械設(shè)計制造及自動化指導教師： 蘆玉梅二〇一二年六I摘 要機械加工工藝是規(guī)定產(chǎn)品或零件機械加工工藝過程和操作方法，是指導生產(chǎn)的重要的技術(shù)性文件。它直接關(guān)系到產(chǎn)品的質(zhì)量、生產(chǎn)率及其加工產(chǎn)品的經(jīng)濟效益，生產(chǎn)規(guī)模的大小、工藝水平的高低以及解決各種工藝問題的方法和手段都要通過機械加工工藝來體現(xiàn)，因此工藝規(guī)程的編制的好壞是生產(chǎn)該產(chǎn)品的質(zhì)量的重要保證的重要依據(jù)。在編制工藝時須保證其合理性、科學性、完善性。而機床夾具是為了保證產(chǎn)品的質(zhì)量的同時提高生產(chǎn)的效率、改善工人的勞動強度、降低生產(chǎn)成本而在機床上用以裝夾工件的一種裝置，其作用是使工件相對于機床或刀具有個正確的位置，并在加工過程中保持這個位置不變。它們的研究對機械工業(yè)有著很重要的意義，因此在大批量生產(chǎn)中，常采用專用夾具。 關(guān)鍵詞: 工藝規(guī)程；刀具；夾具 II AbstractThe machining process is a regulation products or parts machining process and operation method, is guiding the production of important technical documents. It directly related to the quality of the products, productivity and its processing products economic benefits, the size of the production, process of level and process problems to solve all the methods and means of the machining technology to manifest, so the stand or fall of the procedure for the quality of its products is the important guarantee of the important basis. Compiling process should ensure that its rationality, scientific and perfect sex. And machine tool is to ensure that the product of the fixture the quality at the same time improve the production efficiency, improve the labor intensity, reduce production cost and in the machine tool used to clamping workpiece, a device, and its function is to make the work relative to the machine or knife has a correct position, and in the machining process keep this position unchanged. Their research of mechanical industry has a very important significance in mass production, therefore, often use special jig. Keywords: Procedure。 Cutting tool 。 Fixture III 目 錄摘 要 ..........................................................................................................................IAbstract......................................................................................................................II第 1 章 緒論 .............................................................................................................1 機械加工工藝規(guī)程 .........................................................................................1 工藝規(guī)程制訂的原則 .....................................................................................1 制訂工藝規(guī)程時的原始資料 .........................................................................2 制訂工藝規(guī)程的步驟 .....................................................................................2 工藝文件格式 .................................................................................................3 機械加工工藝過程卡 ..............................................................................3 機械加工工藝卡片 ..................................................................................3 機械加工工序卡片 ..................................................................................3 夾具設(shè)計的基本要求 .....................................................................................4第 2 章 CA6140 機床后托架加工工藝編制 ...........................................................5 CA6140 機床后托架的工藝性分析及毛坯的選擇 ......................................5 CA6140 機床后托架結(jié)構(gòu)的工藝性 ........................................................5 CA6140 機床后托架的技術(shù)要求 ............................................................5 CA6140 機床后托架毛坯的選擇 ............................................................6 加工工藝過程的設(shè)計 .....................................................................................6 工藝過程的組成 ......................................................................................6 定位基準的選擇 ......................................................................................7 加工階段的劃分 ......................................................................................8 各表面加工方案的確定 ........................................................................10 工序的集中與分散 ................................................................................11 加工工藝路線方案的比較 ....................................................................12 加工的工序設(shè)計 ...........................................................................................14 毛坯的結(jié)構(gòu)工藝要求 ............................................................................14 加工余量及工序尺寸的確定 ................................................................14 機床和工藝裝備的選擇 ........................................................................17 IV 確定切削用量及基本工時 ....................................................................18 時間定額計算及生產(chǎn)安排 ...........................................................................32 粗、精銑底面 ........................................................................................32 鏜側(cè)面三杠孔 ........................................................................................32 鉆頂面四孔 ............................................................................................33第 3 章 專用夾具設(shè)計 ...........................................................................................35 銑平面夾具設(shè)計 ...........................................................................................35 研究原始資料 ........................................................................................35 定位基準的選擇 ....................................................................................35 切削力及夾緊分析計算 ........................................................................35 誤差分析與計算 ....................................................................................37 夾具設(shè)計及操作的簡要說明 ..................................................................37 鏜孔夾具設(shè)計 ...............................................................................................38 研究原始資料 ........................................................................................38 定位基準的選擇 ....................................................................................38 切削力及夾緊力的計算 ........................................................................38 誤差分