【正文】 rank shaft undergo military service a condition bad, so to crank shaft material, semifinished product processing technology, accuracy, surface rough degree, hot processing and the surface enhance, move balance etc. request all very strict. Therefore want to draw up reasonable of process a craft, want first according to request choice reasonable of semifinished product, in the process of process in want to choose reasonable of process equipments and knife, tongs, quantity and measure method, want to carry on to process a work preface design in process the craft, process size, time settle sum of calculation, the spare parts process to want design reasonable of appropriation tongs. Acpany with crank shaft to process a develop of craft, process a method to not only improve, process a method more and more advanced, so the crank shaft of design reasonable process a craft and pack to clip of tongs, not only can raise to process accuracy, but also can raise production efficiency, the cost for lowering produce thus with expect exaltation product of petition ability. KEY WORDS: Crank shaft, Technology, Jig III 目 錄 前 言 ....................................................................................................... 1 1 曲軸的作用 ..................................................................................... 1 2 發(fā)動(dòng)機(jī)曲軸加工工藝的歷史發(fā)展演變 .......................................... 1 3 曲軸加工工藝現(xiàn)狀 ......................................................................... 3 第 1 章 零件加工工藝設(shè)計(jì) ...................................................................... 4 零件工藝分析 .............................................................................. 4 零件加工特點(diǎn)及解決方法 ........................................................... 5 零件加工特點(diǎn) ..................................................................... 5 加工零件 采取的措施 ......................................................... 6 確定毛坯 ...................................................................................... 6 確定毛坯 ............................................................................ 6 確定機(jī)械加工余量 ............................................................. 6 設(shè)計(jì)毛坯圖 .................................................................................. 8 確定毛坯尺寸公差 ............................................................. 8 確定圓角半徑 ..................................................................... 9 確定拔模角度 ................................................................... 10 確定分模位置 ................................................................... 10 確定毛坯及毛坯的熱處理方式 ....................................... 10 加工工藝路線擬定 ..................................................................... 10 主要技術(shù)要求 ................................................................... 10 加工方法 .......................................................................... 10 加工順序的安排 ................................................................11 加工工序設(shè)計(jì) ............................................................................ 13 工序 20 銑側(cè)面及底面 ..................................................... 13 工序 40 粗主軸頸，工序 50 精車主軸頸 ........................ 14 工件中孔的加工 ........................................................................ 15 工件中的孔和螺紋孔的精度和加工步驟 ........................ 15 工序 80 中鉆、鉸，攻絲至 M12 ..................................... 16 IV 第 2 章 熱處理工藝設(shè)計(jì) ........................................................................ 18 35CrMo 熱處理的技術(shù)要求 ......................................................... 18 調(diào)質(zhì)工藝與用材分析 ................................................................. 18 調(diào)質(zhì) 工藝參數(shù)的確定 ....................................................... 18 組織性能的分析 ............................................................... 19 去應(yīng)力退火工藝 ........................................................................ 20 表面處理及用材分析 ................................................................. 21 表面熱處理工藝 ............................................................... 21 組織性能的分析 ............................................................... 22 第 3 章 夾具設(shè)計(jì) .................................................................................... 25 夾具設(shè)計(jì)應(yīng)該具備的基本要求 ................................................. 25 連桿頸加工專用夾具計(jì)算方法 ................................................. 25 專用夾具設(shè)計(jì) ............................................................................ 27 問題的提出 ....................................................................... 27 確定設(shè)計(jì)方案 ................................................................... 27 計(jì)算夾緊力 ....................................................................... 28 定位精度分析 ................................................................... 28 第 4 章 檢驗(yàn)方法設(shè)計(jì) ............................................................................ 29 定位基準(zhǔn)選擇 ............................................................................ 29 粗基準(zhǔn)的選擇 ................................................................... 29 精基準(zhǔn)的選擇 ................................................................... 29 測(cè)量工具選擇及測(cè)量方法設(shè)計(jì) ................................................. 29 技術(shù)要求的測(cè)量方法 ................................................................. 30 曲軸的最終檢測(cè)方法 ................................................................. 31 結(jié) 論 ....................................................................................................... 32 謝 辭 ...............................................................