【正文】 .................. 1 數(shù)控起源與發(fā)展 ....................................................................................................... 1 數(shù)控（ NC）階段（ 1952～ 1970 年） .......................................................... 1 計(jì)算機(jī)數(shù)控（ CNC）階段（ 1970 年～現(xiàn)在） ........................................... 1 國(guó)內(nèi)數(shù)控機(jī)床量的現(xiàn)狀 .......................................................................................... 2 第二章 數(shù)控加工工藝與分析 .............................................................................................. 3 數(shù)控加工工藝的基本特點(diǎn)和主要內(nèi)容 .................................................................. 3 零件圖的數(shù)控加工工藝分析 .................................................................................. 4 數(shù)控加工工藝設(shè)計(jì) .................................................................................................. 5 零件表面數(shù)控加工方案的選擇 .................................................................... 6 工序的劃分 .................................................................................................... 7 定位與夾緊方式的確定 ................................................................................ 8 加工順序的安排 ............................................................................................ 8 確定走刀 路線和工步順序 ............................................................................ 8 對(duì)刀點(diǎn)與換刀點(diǎn)的確定 ................................................................................ 9 第三章 刀具的選擇 ............................................................................................................ 10 對(duì)數(shù)控刀具的要求 ................................................................................................ 10 刀具快換、自動(dòng)更換和尺寸預(yù)調(diào) ........................................................................ 11 刀具快換或自動(dòng)更換 ................................................................................... 11 數(shù)控刀具尺寸預(yù)調(diào) ...................................................................................... 12 數(shù)控刀具的工具系統(tǒng) .................................................................................. 12 數(shù)控車刀的類型與選擇 .............................................................................. 13 第四章 軸類零件加工 ........................................................................................................ 16 軸類零件的功用、結(jié)構(gòu)特點(diǎn)及技術(shù)要求 ............................................................ 16 第五章 軸類零件的毛坯，材料及熱處理 ........................................................................ 17 軸類零件的毛坯和材料 ......................................................................................... 17 軸類零件的毛坯 .......................................................................................... 17 軸類零件的材料 .......................................................................................... 17 軸類零件的熱處理 ................................................................................................ 17 第六章 軸 的加工工藝 ........................................................................................................ 19 軸類零件典型工藝路線 ........................................................................................ 19 軸類零件機(jī)械加工工藝文件的制訂（對(duì)傳動(dòng)軸的分析） ................................ 19 零件的工藝 分析 .......................................................................................... 19 毛坯的選擇 .................................................................................................. 20 定位基準(zhǔn)的選擇 .......................................................................................... 20 工藝路線的擬定 .......................................................................................... 21 第七章 切削用量選擇 ........................................................................................................ 25 切削用量的選用原則 ............................................................................................ 25 切削用量的選取方法 ............................................................................................. 25 第八章 軸的實(shí)例加工與編程 ....................