【正文】 析 ................................................................................................5 機械加工余量、工序尺寸及公差的確定: ..........................................................................6 確定切削用量及基本工時 ........................................................................................................7工序Ⅰ 以毛坯底邊為基準，鉆 Ф20MM 孔, 擴孔至 .................................................7 ................................................................................................................................7 ........................................................................................................................8工序Ⅱ 以底端面為基準，銑 Ф40MM 上端面，保證其尺寸要求及粗糙度 ...........................8 ................................................................................................................................8 ........................................................................................................................9工序Ⅲ 以 Ф40 為精基準，鏜 Ф55+ 0MM，鏜 Ф73+ 0MM 保證其尺寸和粗糙度 ...9 ................................................................................................................................9 ......................................................................................................................103. 計算基本工時 ....................................................................................................................10工序Ⅳ 粗鏜、半精鏜、精鏜 Ф55MM 孔至圖樣尺寸 .............................................................10 ..............................................................................................................................11 ......................................................................................................................11工序Ⅳ 以孔 Φ40 為精基準，鉆孔至 Φ7, 鉸孔至 Φ8 確保孔內(nèi)粗糙度為 .................11 ..............................................................................................................................11 ......................................................................................................................11 ..............................................................................................................12工序Ⅵ 以 φ40 上端面為精基準，攻 M8 螺紋 ..................................................................12 ..............................................................................................................................12 ..............................................................................................................................13 ..............................................................................................................13工序Ⅶ 倒角，4R5MM .............................................................................................................13工序Ⅷ 以 Φ22MM 孔為精基準，將兩件兩件銑斷，銑斷量為 4，使其粗糙度為 ........13 ..............................................................................................................................13 ......................................................................................................................1311 ..............................................................................................................14夾具設計 ....................................................................................................................................14 問題的提出 ..........................................................................................................................14 夾具設計 ...............................................................................................................................14 定位基準選擇 ...............................................................................................................14 切削力及夾緊力計算 ...........