1、1XX大學(xué)拖拉機(jī)變速箱撥叉零件的工藝及銑面夾具設(shè)計(jì)學(xué)生姓名：學(xué)生學(xué)號：院（系）：年級專業(yè)：指導(dǎo)教師：年月3目錄1緒論......................................................................................................................................11.1課題背景....................

2、....................................................................................................11.2夾具的發(fā)展史..............................................................................................................

3、..11.3小結(jié)................................................................................................................................12拖拉機(jī)變速箱撥叉的加工工藝規(guī)程設(shè)計(jì).................................................................

4、.........32.1零件的分析....................................................................................................................32.1.1零件的作用...........................................................................

5、.............................32.1.2零件的工藝分析................................................................................................32.2確定生產(chǎn)類型........................................................................

6、........................................42.3確定毛坯........................................................................................................................42.3.1確定毛坯種類........................................

7、............................................................42.3.2確定鍛件加工余量及形狀................................................................................42.3.3繪制鍛件零件圖..................................................

8、..............................................42.4工藝規(guī)程設(shè)計(jì)................................................................................................................52.4.1選擇定位基準(zhǔn)........................................

9、............................................................52.4.2制定工藝路線....................................................................................................52.4.3選擇加工設(shè)備和工藝設(shè)備...............................

10、.................................................62.4.4機(jī)械加工余量、工序尺寸及公差的確定........................................................72.5確定切削用量及基本工時(shí).............................................................................

11、...............82.6本章小結(jié)......................................................................................................................203專用夾具設(shè)計(jì)......................................................................

12、..............................................213.1問題的提出..................................................................................................................213.2定位基準(zhǔn)的選擇......................................

13、....................................................................213.3切削力和夾緊力計(jì)算..................................................................................................213.4夾緊力的計(jì)算.............................

14、.................................................................................223.5定位誤差分析..............................................................................................................233.6夾具設(shè)計(jì)及操作的簡要說明.