【正文】 the design features, including parts of NC machining process analysis, the preparation of the procedures parts, spare parts parts of the process is the main line of CNC machining process designed to be given in accordance with the drawings in the design of the NC accurate processing of the preparation procedures, according to the shape of parts used manually, use their own most of the NC programming knowledge to write correct and reasonable procedure. Enable them to meet the size requirements of the drawings, including the machining precision, surface roughness, the degree of problem are noticed in CNC maching. Key words:CNC machine；autoprogramming ；cutting paste；craftwork.遼寧省交通高等?？茖W校機電系畢業(yè)論文第 3 頁 共 25 頁目 錄摘要 ......................................................................................................................2緒言 ......................................................................................................................61 數控加工概述 ...................................................................................................71．1 數控加工的特點及發(fā)展趨勢 ..............................................................................................................7 數控加工的特點 ............................................................................................................................7 數控加工的發(fā)展趨勢 ...................................................................................................................71．2 數控加工工藝內容及特點 ................................................................................................................10 數控加工的工藝內容 .................................................................................................................10 數控加工的特點 .........................................................................................................................111．3 數控加工在機械制造業(yè)中的地位和作用 ........................................................................................112 機械加工工藝設計 ..........................................................................................122．1 零件的工藝分析 ................................................................................................................................12 各種用量的確定 ..................................................................................................................................13 毛坯的選擇 ..................................................................................................................................13 機床的選擇 ..................................................................................................................................14 刀具的選擇 ..................................................................................................................................14 切削用量及切削液的選擇 ..........................................................................................................152．3 確定加工順序 ....................................................................................................................................15 切削加工順序的安排原則 ..........................................................................................................15 熱處理工序的安排原則 ..............................................................................................................16 輔助工序的安排 ..........................................................................................................................162．4 填寫數控加工工藝卡 ........................................................................................................................162．5 數控加工編程 ....................................................................................................................................18 銑四方臺 ......................................................................................................................................18 鍵槽的加工 ...............................................................................................