【正文】 ...............................................................................4第 2 章 CA6140 機(jī)床后托架加工工藝編制 ...........................................................5 CA6140 機(jī)床后托架的工藝性分析及毛坯的選擇 ......................................5 CA6140 機(jī)床后托架結(jié)構(gòu)的工藝性 ........................................................5 CA6140 機(jī)床后托架的技術(shù)要求 ............................................................5 CA6140 機(jī)床后托架毛坯的選擇 ............................................................6 加工工藝過(guò)程的設(shè)計(jì) .....................................................................................6 工藝過(guò)程的組成 ......................................................................................6 定位基準(zhǔn)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(jì) ...........................................................................................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 ................................................................14IV / 55 機(jī)床和工藝裝備的選擇 ........................................................................17 確定切削用量及基本工時(shí) ....................................................................18 時(shí)間定額計(jì)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(zhuān)用夾具設(shè)計(jì) ...........................................................................................35 銑平面夾具設(shè)計(jì) ...........................................................................................35 研究原始資料 ........................................................................................35 定位基準(zhǔn)的選擇 ....................................................................................35 切削力及夾緊分析計(jì)算 ........................................................................35 誤差分析與計(jì)算 ....................................................................................37 夾具設(shè)計(jì)及操作的簡(jiǎn)要說(shuō)明 ..................................................................37 鏜孔夾具設(shè)計(jì) ...............................................................................................38 研究原始資料 ........................................................................................38 定位基準(zhǔn)的選擇 ....................................................................................38 切削力及夾緊力的計(jì)算 ........................................................................38 誤差分析與計(jì)算 ....................................................................................40結(jié) 論 .......................................................................................................................41致 謝 .......................................................................................................................42參考文獻(xiàn) ...................................................................................................................43V / 55CONTENTSAbstract......................................................................................................................IIChapter 1 Introduction .............................................................................................1 Machining process planning............................................................................1 The principle of technicolgical regulations formulation .................................1 The original data when formulation technicolgical regulations......................2 The steps of technicolgical regulations formulation .......................................2 Process file format...........................................................................................3 Machining technology process card .........................................................3 Machining process card ............................................................................3 Machining procedure card ........................................................................3 Basic requests of tongs design ........................................................................5Chaper 2 CA6140 machining process planning of machine bracket .................5 Process analysis and the choice of rough of CA6140 machine after the bracket ............................................................................................................5 Structure of the process for CA6140 machine bracket .............................5 Technical requirements for CA6140 machine bracket .............................5 Choice of rough for CA6140 machine bracket.........................................6 Machining process design ...............................................................................6 The position of the process ................................................................6 The choice of locating datum....................................................................7 Division of processing stages ...................................................................8 Definition of processing program .............................................................9 Centralization and decentralization for process......................................11 The camparation of processing line program .........................................11 The process design of the processi