【正文】 ................................................ 4 連桿的主要技術(shù)要求 ........................................................................................................ 5 大、小頭孔的尺寸精度、形狀精度 ..................................................................... 5 大、小頭孔軸心線在兩個互相垂直方向的平行度 ............................................. 5 大、小頭孔中心距 ................................................................................................. 5 連桿大頭孔兩端面對大頭孔中心線的垂直度 ..................................................... 5 大、小頭孔兩端面的技術(shù)要求 ............................................................................. 5 有關(guān)結(jié)合面的技術(shù)要求 ......................................................................................... 5 連桿的材料和毛坯分析 ................................................................................................... 5 3 連桿的加工工藝規(guī)程的制定 ..................................................................................................... 7 加工 工藝的基本概念 ....................................................................................................... 7 選擇定位基準 ................................................................................................................... 7 確定加工余量 ................................................................................................................... 8 擬訂機械加工工藝路線 ................................................................................................... 8 連桿工藝計算 ................................................................................................................. 10 粗銑兩平面 ........................................................................................................... 10 粗磨兩平面 ........................................................................................................... 11 鉆小頭小孔 ........................................................................................................... 13 粗鏜小頭孔 ........................................................................................................... 14 車大頭外圓 ........................................................................................................... 15 粗鏜大頭孔 ........................................................................................................... 17 粗銑螺栓孔端平面 ............................................................................................... 17 精銑螺栓 孔端平面 ............................................................................................... 17 銑開連桿大頭 ....................................................................................................... 18 精銑體蓋分開面 ................................................................................................. 18 鉆擴鉸螺栓孔 ..................................................................................................... 18 精磨體蓋分開面 ................................................................................................. 20 VI 精磨兩端平面 ..................................................................................................... 21 精鏜小頭孔 ......................................................................................................... 21 粗鏜大頭孔 ......................................................................................................... 22 精鏜大頭孔 ......................................................................................................... 22 精鏜小頭孔 ......................................................................................................... 22 4 夾具設計 ................................................................................................................................... 23 機床 夾 具的分類 ............................................................................................................. 23 工件的加工工藝分析 ..................................................................................................... 23 確定定位方案 ................................................................................................................. 24 夾具 的 機構(gòu)設計 ............................................................................................................. 24 夾具的使用 ..................................................................................................................... 26 5 結(jié)論與展望 ............................................................................................................................... 28 6 致謝 ........................................................................................................................................... 29 .................................................................................................................................... 30 內(nèi)燃機連桿加工工藝及夾具設計 1 1 緒論 本課題的研究內(nèi)容 和 意義 本課題研究的內(nèi)容是： K2500 內(nèi)燃機車發(fā)動機 NDS5 主連桿工藝規(guī)程設計和系列夾具設計，其中包括了工藝流程的設計、工序的編寫、系列夾具的設計，并有相關(guān)計算和說明書。Deformation。 關(guān)鍵詞： 連桿 ； 變形 ； 加工工藝 ； 夾具設計 IV ABSTRACT The connecting rod is one of the main driving medium of diesel engine, this text expounds mainly the machining technology and the design of clamping device of the connecting rod. The precision of size, the precision of profile and the precision of position , of the connecting rod is demanded highly , and the rigidity of the connecting rod is not enough, easy to deform, so arranging the craft course, need to separate the each main and superficial thick finish machining process. Reduce the margin of processing, cutting force and internal stress progressively, revise the deformation after processing, can reach the specification requirement for the part finally . In the Connecting rod is one of the main processing surface is large, the small head hole and both ends of the machined surface, is important for the connecting rod body and cover joint surface and the connecting rod bolt hole