CNC加工(gong)工(gong)序的劃分可以采用兩種不(bu)同原則，即工(gong)序集中(zhong)原則和工(gong)序分散原則。
cnc加工(gong)(gong)(gong)工(gong)(gong)(gong)序(xu)集中原則(ze)是指沒道工(gong)(gong)(gong)序(xu)包括(kuo)盡可能多的加工(gong)(gong)(gong)內容，從(cong)而(er)使工(gong)(gong)(gong)序(xu)的總數(shu)減少(shao)(shao)。cnc加工(gong)(gong)(gong)工(gong)(gong)(gong)序(xu)集中原則(ze)適用(yong)于(yu)在高(gao)效的專用(yong)設備(bei)和(he)(he)數(shu)控機床上的工(gong)(gong)(gong)件加工(gong)(gong)(gong)。采用(yong)工(gong)(gong)(gong)序(xu)集中原則(ze)的優(you)點是；提高(gao)生(sheng)產效率(lv)；減少(shao)(shao)工(gong)(gong)(gong)序(xu)的數(shu)目，縮短工(gong)(gong)(gong)藝路線，簡化生(sheng)產計劃和(he)(he)生(sheng)產組織工(gong)(gong)(gong)作；減少(shao)(shao)基礎數(shu)量、操作工(gong)(gong)(gong)人數(shu)和(he)(he)占(zhan)地面積；減少(shao)(shao)工(gong)(gong)(gong)件裝夾(jia)(jia)次數(shu)，不僅保證了(le)個加工(gong)(gong)(gong)表面間的相互位置精度(du)，而(er)且減少(shao)(shao)了(le)夾(jia)(jia)具(ju)數(shu)量和(he)(he)裝夾(jia)(jia)工(gong)(gong)(gong)件的輔助(zhu)時間。但是，cnc加工(gong)(gong)(gong)設備(bei)和(he)(he)工(gong)(gong)(gong)業裝備(bei)投資大(da)，調整維修比較麻煩(fan)，生(sheng)產準備(bei)周(zhou)期較長、不利(li)于(yu)轉產。
工序分散就是將工件的加工分散在較多的cnc加工工序內進行，每道工序的加工內容很少。cnc加工工序分散原則適用于結構簡單的加工設備和工藝設備。采用工序分散原則的優點是；加工設備和工藝設備操作簡單，調整和維修方便，轉產容易；有利于選擇合理的切削用量，減少機動時間。但是，工藝路線較長，占地面積大，所需設備及工人人數多，加工精度受操作人員的技術水平影響大。
