1目 錄目 錄 ...................................................................................................................................................................1緒 論 .................................................................................................................................................................31 連桿加工工藝 ...............................................................................................................................................41.1 連桿的結(jié)構(gòu)特點(diǎn) ................................................................................................................................41.2 連桿的主要技術(shù)要求 ..............................................................................................................................41.2.1 大、小頭孔的尺寸精度、形狀精度 ...............................................................................................51.2.2 大、小頭孔軸心線在兩個互相垂直方向的平行度 .......................................................................51.2.3 大、小頭孔中心距 ...........................................................................................................................51.2.4 連桿大頭孔兩端面對大頭孔中心線的垂直度 ...............................................................................51.2.5 大、小頭孔兩端面的技術(shù)要求 .......................................................................................................61.2.6 2-Φ15 螺栓孔的技術(shù)要求 ............................................................................................................61.2.7 有關(guān) 2-Φ15 螺栓孔兩端面的技術(shù)要求 .........................................................................................61.3 連桿的材料和毛坯 ................................................................................................................................61.4 連桿的機(jī)械加工工藝過程 ................................................................................................................81.5 連桿的機(jī)械加工工藝過程分析 ..............................................................................................................91.5.1 工藝過程的安排 ...............................................................................................................................91.5.2 定位基準(zhǔn)的選擇 .............................................................................................................................101.5.3 確定合理的夾緊方法 .....................................................................................................................101.5.4 連桿兩端面的加工 .........................................................................................................................111.5.5 連桿大、小頭孔的加工 .................................................................................................................111.5.6 連桿 2-Φ15 螺栓孔的加工 ...........................................................................................................111.6 確定各工序的加工余量、計(jì)算工序尺寸及公差 ................................................................................111.7 工時定額的計(jì)算 ....................................................................................................................................131.7.1粗銑連桿大小頭上端面 ..................................................................................................................131.7.2粗銑連桿大小頭下端面 ................................................................................................................141.7.3粗鏜、半精鏜 Φ70H7 孔、Φ46H7 孔 .........................................................................................141.7.4 精銑連桿大頭 Φ70H7 孔兩端面 ....................................................................................................151.7.5、粗銑、精銑 2-Φ15 螺栓孔兩端面 .............................................................................................161.7.6 銑寬 60兩側(cè)面 ................................................................................................................................171.7.7 銑寬 64兩側(cè)面 ................................................................................................................................171.7.8 鉆、擴(kuò)、鉸 2-Φ15H8 螺栓孔并倒角 C1、C1.5 ...........................................................................181.7.9 鉆 2-Φ7 孔 ......................................................................................................................................191.7.10 鉆 2-Φ5 孔（頭部 Φ10，角度 90°） ......................................................................................191.7.11精鏜 Φ70H7 孔、Φ46H7 孔 .......................................................................................................201.7.12半精鏜、精鏜 Φ40H7 銅套孔 ....................................................................................................201.8 連桿的檢驗(yàn) ............................................................................................................................................211.8.1 觀察外表缺陷及目測表面粗糙度 .................................................................................................211.8.2 連桿大頭孔圓柱度的檢驗(yàn) .............................................................................................................211.8.3 連桿體、連桿上蓋對大頭孔中心線的對稱度的檢驗(yàn) .................................................................211.8.4 連桿大小頭孔平行度的檢驗(yàn) .........................................................................................................2222 夾具設(shè)計(jì) .......................................................................................................................................................232.1 問題的指出 .........................................................................................................................................232.2 夾具設(shè)計(jì) ............................................................................................................................................231) 定位基準(zhǔn)的選擇 .................................................................................................................................232) 夾緊方案 .............................................................................................................................................233) 夾具體設(shè)計(jì) .........................................................................................................................................234) 切削力及夾緊力的計(jì)算 .....................................................................................................................235) 定位誤差分析 .....................................................................................................................................24結(jié) 論 .........................................................................................................................................................25致 謝 .........................................................................................................................................................26參考文獻(xiàn) ...................................................................................................................................................27