【正文】 ....................................................... 4 ．零件的工藝分析 ................................................................................... 5 確定生產(chǎn)類型 ..................................................................................................5 三 確定毛坯 .................................................................................................................. 6 確定毛坯種類 ..................................................................................................6 確定鑄件加工余量及形狀 ..............................................................................6 四 工藝規(guī)程設(shè)計(jì) .......................................................................................................... 8 定位基準(zhǔn)的選擇 ..............................................................................................8 ．粗基準(zhǔn)的選擇 ....................................................................................... 8 ．精基準(zhǔn)的選擇 ....................................................................................... 8 零件表面加工方法的選擇 ..............................................................................8 ． A 端面 ................................................................................................... 9 ． Φ22花鍵底孔 ....................................................................................... 9 ． 8 mm 槽的 D 端面 ............................................................................... 9 ． 8 mm槽 ................................................................................................ 9 ． 18 mm槽 .............................................................................................. 9 ．花鍵孔 ................................................................................................... 9 ．兩處倒角 ............................................................................................. 10 制定工藝路線 ................................................................................................10 ．工藝路線方案一 ................................................................................. 10 ．工藝路線方案二 ................................................................................. 10 XX 理工《機(jī)械制造工藝》課程設(shè)計(jì) 2 ．工藝方案的比較與分析 ..................................................................... 11 確定機(jī)械加工余量、工序尺寸及公差的確定 ............................................ 11 ．確定毛坯 ............................................................................................. 11 ．確定工序余量，工序尺寸及其公差 ................................................. 12 ．各加工表面的工藝路線 ..................................................................... 14 確定切削用量及時(shí)間定額 ............................................................................15 ．工序Ⅰ端面 A 銑削用量及基本時(shí)間的確定 .................................... 16 ．確定切削用量及基本工時(shí) ................................................................. 16 ．工序Ⅱ鉆 — 擴(kuò)孔 Φ22mm .................................................................. 18 ．工序Ⅲ端面 D 銑削用量及基本時(shí)間的確定 .................................... 19 ．工序Ⅳ槽 8mm 的銑削用量及基本時(shí)間的確定 .............................. 21 ．工序Ⅴ槽 18mm 的銑削用量及基本時(shí)間的確定 ............................ 23 ．工序Ⅶ拉花鍵孔切削用量及基本時(shí)間的確定 ................................. 25 五 夾具設(shè)計(jì) ................................................................................................................ 26 問題的提出 ....................................................................................................26 夾具設(shè)計(jì)的有關(guān)計(jì)算 ....................................................................................26 ．定位基準(zhǔn)的選擇 ................................................................................. 26 ．切削力及夾緊力計(jì)算 ......................................................................... 26 ．定位誤差分析 ..................................................................................... 27 夾具結(jié)構(gòu)設(shè)計(jì)及操作簡(jiǎn)要說 明 ....................................................................27 六 設(shè)計(jì)感想與體會(huì) .................................................................................................... 31 主要參考文獻(xiàn) .............................................................................................................. 32 XX 理工《機(jī)械制造工藝》課程設(shè)計(jì) 3 設(shè)計(jì) CA6140車床撥叉零件 (83100