數控(kong)加(jia)(jia)工(gong)(gong)。數控(kong)加(jia)(jia)工(gong)(gong)模具(ju)應該注(zhu)意什(shen)么避免(mian)垂直下(xia)刀(dao)。平(ping)底圓柱(zhu)銑(xian)刀(dao)有兩(liang)種(zhong)，一(yi)種(zhong)是端(duan)面(mian)(mian)有孔(kong)，其端(duan)刃不(bu)(bu)過中心(xin)。另一(yi)種(zhong)是端(duan)面(mian)(mian)無孔(kong)，大型(xing)數控(kong)車床加(jia)(jia)工(gong)(gong)，端(duan)刃相連(lian)且(qie)過中心(xin)。在銑(xian)削曲面(mian)(mian)時(shi)，cnc數控(kong)加(jia)(jia)工(gong)(gong)中心(xin)，有孔(kong)的端(duan)銑(xian)刀(dao)不(bu)(bu)能像鉆(zhan)(zhan)頭(tou)似的向下(xia)垂直進刀(dao)，除非(fei)預先(xian)鉆(zhan)(zhan)有工(gong)(gong)藝(yi)孔(kong)。否則會把銑(xian)刀(dao)頂斷。如果用無孔(kong)的端(duan)刀(dao)時(shi)可以(yi)(yi)垂直向下(xia)進刀(dao)，但(dan)由(you)于刀(dao)刃角度太(tai)小，軸向力很(hen)大，所以(yi)(yi)也應盡量避免(mian)。

例如，軸(zhou)類零(ling)(ling)件加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)時，通常先(xian)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)中心(xin)孔，再以中心(xin)孔為(wei)精(jing)基準加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)外園表面和端面。cnc數(shu)控加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)(gong)序的(de)安排：先(xian)主(zhu)后次原則：應先(xian)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)零(ling)(ling)件的(de)主(zhu)要(yao)工(gong)(gong)(gong)(gong)(gong)作(zuo)表面、裝配(pei)基面，合肥數(shu)控加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)，從而及早發現(xian)毛坯中主(zhu)要(yao)表面可能出(chu)現(xian)代(dai)缺陷。次要(yao)表面可穿插進(jin)行(xing)，數(shu)控加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)廠(chang)家，放在(zai)主(zhu)要(yao)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)表面加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)到(dao)一(yi)定程度后、終(zhong)精(jing)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)之前(qian)進(jin)行(xing)。先(xian)面后孔原則：箱體、支(zhi)架類零(ling)(ling)件的(de)平面輪廓尺寸(cun)(cun)較大，一(yi)般(ban)先(xian)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)平面，再加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)孔和其他(ta)尺寸(cun)(cun)。

在(zai)數(shu)控(kong)加工過(guo)程(cheng)中(zhong)，進給(gei)(gei)速(su)(su)度也可通過(guo)機床(chuang)控(kong)制面板上(shang)的(de)(de)進給(gei)(gei)倍率修(xiu)調開(kai)關進行人(ren)工調整，但是1大進給(gei)(gei)速(su)(su)度要受到設備剛度和(he)進給(gei)(gei)系統性能等(deng)的(de)(de)限制。隨著數(shu)控(kong)機床(chuang)在(zai)生產(chan)實際中(zhong)的(de)(de)廣(guang)泛應用(yong)，數(shu)控(kong)編(bian)程(cheng)已經成為數(shu)控(kong)加工中(zhong)的(de)(de)關鍵(jian)問題之一。在(zai)數(shu)控(kong)程(cheng)序(xu)的(de)(de)編(bian)制過(guo)程(cheng)中(zhong)，要在(zai)人(ren)機交互狀態下即時選擇刀具和(he)確定切削用(yong)量(liang)。因此，編(bian)程(cheng)人(ren)員必須熟悉刀具的(de)(de)選擇方法和(he)切削用(yong)量(liang)的(de)(de)確定原則，從而保證零件的(de)(de)加工質量(liang)和(he)加工效率，充分發揮數(shu)控(kong)機床(chuang)的(de)(de)優點。