【正文】 工藝規(guī)程是生產組織和管理工作的基本依據 ， 首先，有了工藝規(guī)程，在新產品投入生產之前，就可以進行有關生產前的技術準備工作。對于單件小批生產的活件，工藝規(guī)程可以簡單些。 Fixture III 目 錄 摘 要 ......................................................................................................................... I Abstract ..................................................................................................................... II 第 1 章 緒論 ............................................................................................................ 1 機械加工工藝規(guī)程 ....................................................................................... 1 工藝規(guī)程制訂的原則 ................................................................................... 1 制訂工藝規(guī)程時的原始資料 ....................................................................... 2 制訂工藝規(guī)程的步驟 ................................................................................... 2 工藝文件格式 ............................................................................................... 3 機械加工工藝過程卡 ............................................................................ 3 機械加工工藝卡片 ................................................................................ 3 機械加 工工序卡片 ................................................................................ 3 夾具設計的基本要求 ................................................................................... 4 第 2 章 CA6140 機床后托架加工工藝編制 ........................................................ 5 CA6140 機床后 托架的工藝性分析及毛坯的選擇 ................................... 5 CA6140 機床后托架結構的工藝性 ..................................................... 5 CA6140 機床后托架的技術要求 ......................................................... 5 CA6140 機床后托架毛坯的選擇 ......................................................... 6 加工工藝過程的設計 ................................................................................... 6 工藝過程的組成 ..................................................................................... 6 定位基準的選擇 ..................................................................................... 7 加工階段的劃分 ..................................................................................... 8 各表面加工方案的確定 ...................................................................... 10 工序的集中與分散 ...............................................................................11 加工工藝路線方案的比較 .................................................................. 12 加工的工序設計 ......................................................................................... 14 毛坯的結構工藝 要求 .......................................................................... 14 加工余量及工序尺寸的確定 .............................................................. 14 機床和工藝裝備的選擇 ...................................................................... 17 IV 確定切削用量及 基本工時 .................................................................. 18 時間定額計算及生產安排 ......................................................................... 32 粗、精銑底面 ....................................................................................... 32 鏜側面三杠孔 ....................................................................................... 32 鉆頂面四孔 ........................................................................................... 33 第 3 章 專用夾具設計 .......................................................................................... 35 銑平面夾具設計 ......................................................................................... 35 研究原始資料 ....................................................................................... 35 定位基準的選擇 ................................................................................... 35 切削力及夾緊分析計算 ...................................................................... 35 誤差分析與計算 ................................................................................... 37 夾具設計及操作的簡要說明 ................................................................ 37 鏜孔夾具設計 ............................................................................................. 38 研究原始資料 ....................................................................................... 38 定位基準的選擇 ................................................................................... 38 切削力及夾緊力的計算 ...................................................................... 38 誤差分析與計算 ................................................................................... 40 結 論 ...................................................................................................................... 41 致 謝 ...................................................................................................................... 42 參考文獻 .................................................................................................................. 43 V CONTENTS Abstract ..................................................................................................................... II Chapter 1 Introduction............................................................................................ 1 Machining process planning ......................................................................... 1 The principle of technicolgical regulations formulation ............................. 1 The original data when formulation technicolgical regulations ................. 2 The steps of technicolgical regulations formulation ................................... 2 Process file format......................................................................................... 3 Machining technology process card....................................................... 3 Machining process card .......................................................................... 3 Machining procedure card ..