機械加工的數控車床加工，就是泛指在數控機床上進行零件加工的工藝過程。數控機床是一種用計算機來控制的機床，用來控制機床的計算機，不管是專用計算機、還是通用計算機都統稱為數控系統。數控機床的運動和輔助動作均受控于數控系統發出的指令。 機械加工(gong)(gong)/數(shu)控銑床加工(gong)(gong)
而數控(kong)(kong)(kong)(kong)系(xi)統(tong)的指(zhi)(zhi)令(ling)(ling)是由(you)程序(xu)員(yuan)根(gen)據工件(jian)的材(cai)質、加(jia)工要求、機床的特性和系(xi)統(tong)所規(gui)定的指(zhi)(zhi)令(ling)(ling)格式（數控(kong)(kong)(kong)(kong)語(yu)言或符號）編制的。數控(kong)(kong)(kong)(kong)系(xi)統(tong)根(gen)據程序(xu)指(zhi)(zhi)令(ling)(ling)向伺(si)服裝置和其它功能(neng)部件(jian)發出運行或終斷信(xin)息來控(kong)(kong)(kong)(kong)制機床的各種(zhong)(zhong)運動。當(dang)零件(jian)的加(jia)工程序(xu)結束時，機床便會(hui)自動停止。任何(he)一種(zhong)(zhong)數控(kong)(kong)(kong)(kong)機床，在其數控(kong)(kong)(kong)(kong)系(xi)統(tong)中若沒有(you)輸入程序(xu)指(zhi)(zhi)令(ling)(ling)，數控(kong)(kong)(kong)(kong)機床就(jiu)不能(neng)工作。
機械(xie)加工的機床的受控(kong)動(dong)作大(da)致包括機床的起(qi)動(dong)、停(ting)止；主軸(zhou)的啟停(ting)、旋轉方向(xiang)和轉速的變(bian)換；進給運動(dong)的方向(xiang)、速度(du)、方式(shi)；刀(dao)具的選(xuan)擇(ze)、長度(du)和半徑的補(bu)償(chang)；刀(dao)具的更換，冷卻液的開(kai)起(qi)、關閉等。
數控(kong)機床一(yi)開始(shi)就選定具有復雜型(xing)面的(de)飛(fei)機零件(jian)作為(wei)加工(gong)(gong)對象(xiang)，解決普通的(de)加工(gong)(gong)方法難以解決的(de)關鍵。數控(kong)加工(gong)(gong)的(de)最大特點(dian)是(shi)用穿(chuan)孔帶(dai)（或磁帶(dai)）控(kong)制機床進行自動加工(gong)(gong)。
由于飛機(ji)、火箭和發動機(ji)零件各有(you)不(bu)同的(de)特點：飛機(ji)和火箭的(de)零、構件尺寸(cun)大、型面復雜；發動機(ji)零、構件尺寸(cun)小、精度高。
因此機(ji)(ji)械加(jia)工的(de)飛機(ji)(ji)、火箭制(zhi)(zhi)造(zao)部門和發動(dong)機(ji)(ji)制(zhi)(zhi)造(zao)部門所(suo)選(xuan)用的(de)數(shu)控(kong)(kong)(kong)(kong)機(ji)(ji)床有所(suo)不同(tong)。在(zai)飛機(ji)(ji)和火箭制(zhi)(zhi)造(zao)中(zhong)以采用連(lian)續控(kong)(kong)(kong)(kong)制(zhi)(zhi)的(de)大型數(shu)控(kong)(kong)(kong)(kong)銑床為(wei)主，而(er)在(zai)發動(dong)機(ji)(ji)制(zhi)(zhi)造(zao)中(zhong)既采用連(lian)續控(kong)(kong)(kong)(kong)制(zhi)(zhi)的(de)數(shu)控(kong)(kong)(kong)(kong)機(ji)(ji)床，也采用點(dian)位控(kong)(kong)(kong)(kong)制(zhi)(zhi)的(de)數(shu)控(kong)(kong)(kong)(kong)機(ji)(ji)床（如數(shu)控(kong)(kong)(kong)(kong)鉆床、數(shu)控(kong)(kong)(kong)(kong)鏜床、加(jia)工中(zhong)心(xin)等）。 機(ji)(ji)械加(jia)工/數(shu)控(kong)(kong)(kong)(kong)銑床加(jia)工
