2350 車床變速箱中拔叉及專用夾具設計,車床,變速箱,中拔叉,專用,夾具,設計 河南理工大學萬方科技學院本科畢業(yè)論文i目 錄1 緒 論 ...............................................................................................................................12 撥叉的加工工藝規(guī)程設計 .......................................................................................42.1、零件的分析 ....................................................................................................42.1.1 零件的作用 ............................................................................................42.1.2 零件的工藝分析 ...................................................................................62.2、工藝規(guī)程的設計 ...........................................................................................82.2.1 確定毛坯的制造形式 ..........................................................................82.2.2 基準的選擇 ...........................................................................................82.2.3 制定工藝路線 ........................................................................................92.2.4 機械加工余量、工序尺寸及毛皮尺寸的確定 .........................112.2.5 確定切削用量及基本工時 .............................................................153 專用夾具設計 ...........................................................................................................313.1 機床夾具介紹 ................................................................................................313.2 現代機床夾具的發(fā)展方向 .........................................................................313.3 機床夾具的定位及夾緊 ..............................................................................313.3.1 概述 .......................................................................................................323.3.2 機床夾具的組成 ................................................................................323.3.3 機床夾具的分類 ................................................................................333.3.4 機床夾具在機械加工中的作用 .....................................................343.4 工件的裝夾方式............................................................................................343.5 基準及其分類 .................................................................................................353.6 工件的定位 ......................................................................................................363.7 工件的夾緊 .....................................................................................................373.7.1 夾緊裝置的組成 ................................................................................373.7.2 對夾緊裝置的基本要求 ....................................................................373.7.3 夾緊力的確定 .....................................................................................383.8 夾具的設計 ......................................................................................................384 小結 ...........................................................................................................................40致 謝 ..............................................................................................................................41參考文獻 .........................................................................................................................42附錄： ..............................................................................................................................43