【正文】 .......... 5 制定工藝路線 ............................................. 5 機械加工余量，工序尺寸及毛坯尺寸確定 ..................... 7 第 3章 夾具設計 ......................................................... 18 拉胎 ........................................................... 18 問題的提出 .............................................. 18 定位基準的選擇 .......................................... 18 定位誤差分析 ............................................ 18 夾緊力 .................................................. 18 胎具結構 ................................................ 18 磨胎 ........................................................... 18 IV 問題的提出 .............................................. 18 定位基準的選擇 .......................................... 19 夾具結構 ................................................ 19 磨頭 ........................................................... 22 打磨砂輪工具 ................................................... 23 第 4章 內曲面成形拉刀設計 ............................................... 23 粗拉刀設計 ..................................................... 23 切削部設計 .............................................. 23 校準部設計 .............................................. 29 其它部分及拉刀總長度 .................................... 30 拉刀強度計算及拉削力的校驗 .............................. 33 精拉刀設計 ..................................................... 34 參 數(shù)選擇 ................................................ 34 校核最大拉削力 maxF ...................................... 37 拉刀強度校驗 ............................................ 37 拉刀總長度 L ............................................ 37 結束語 .................................................................. 40 致 謝 ................................................................... 41 參考文獻 ................................................................ 42 V CONTENTS Abstract........................................................................................................................................................... II Chapter One Introduction.......................................................................................................................1 Gear Pump Overview............................................................................................................1 Development Trend of gear pump.......................................................................................1 The basic requirements of external rotor design ................................................................3 Chapter Two External rotor design process .........................................................................................4 Parts of the analysis ................................................................................................................4 Parts of the role..........................................................................................................4 Parts Process Analysis..............................................................................................4 Process planning .....................................................................................................................4 Determine the form of blank manufacturing ........................................................4 The choice of the base surface ................................................................................5 Development of process routes ..............................................................................5 Machining allowance, process to determine the size and rough size ................7 Chapter Three Fixture Design ............................................................................................................ 18 Pull tire .................................................................................................................................. 18 Proposed of the problems ..................................................................................... 18 The choice of locating datum............................................................................... 18 Orientation error..................................................................................................... 18 Clamping force ...................................................................................................... 18 Mold structure ........................................................................................................ 18 Tire wear ............................................................................................................................... 18 Proposed of the problems ..................................................................................... 18 VI The choice of locating datum............................................................................... 19 Fixture Structure .................................................................................................... 19 Grinding head ...................................................................................................................... 22 Tool grinding wheel ............................................................................................................ 23 Chapter Four Broach the surface forming the design...................................................................... 23 Rough broach design .......................................................................................................... 23 Department of Design Cutting............................................................................. 23 Department of Design Calibration ...................................................................... 29 Other parts and the total length of broach.....................................................