CNC加工工序劃分有什么要求呢

CNC加工在辨別工序時，必然要視零件的布局與工藝性，數控加工中間機床的功用，零件數控加工內容的多少，裝配次數及本單元生產構造狀態靈敏掌握。另主意選用工序會集的規則還是選用工序疏散的規則，要根據實際環境來確定，但必然力圖合理。工序的辨別普通可按下列辦法舉行：
1、刀具會集分序法。

這種(zhong)辦法是按所(suo)(suo)用刀具(ju)(ju)辨(bian)別工(gong)(gong)序，用同(tong)一把(ba)刀具(ju)(ju)加(jia)(jia)工(gong)(gong)完零件上全(quan)部(bu)(bu)可(ke)以結束的(de)部(bu)(bu)位。為了(le)減少換刀時(shi)候(hou)，緊縮(suo)空程時(shi)候(hou)，減少無謂要的(de)定位差錯(cuo)(cuo)，可(ke)按刀具(ju)(ju)會集工(gong)(gong)序的(de)辦法加(jia)(jia)工(gong)(gong)零件，即(ji)在一次裝夾中，盡可(ke)能(neng)用一把(ba)刀具(ju)(ju)加(jia)(jia)工(gong)(gong)出可(ke)能(neng)加(jia)(jia)工(gong)(gong)的(de)所(suo)(suo)用部(bu)(bu)位，而(er)后再換另(ling)一把(ba)刀加(jia)(jia)工(gong)(gong)其余部(bu)(bu)位。這樣可(ke)減少換刀次數，緊縮(suo)空程時(shi)候(hou)，減少無謂要的(de)定位差錯(cuo)(cuo)。
2、以加工部位分(fen)序法(fa)。
每(mei)個(ge)零件(jian)布(bu)局樣(yang)式(shi)差(cha)別，各(ge)(ge)表(biao)面的技能要求也有所(suo)差(cha)別，故加工(gong)時(shi)，其定位(wei)技巧(qiao)各(ge)(ge)有差(cha)異，于是(shi)可根(gen)據(ju)定位(wei)技巧(qiao)的差(cha)別來辨別工(gong)序。
關于加(jia)(jia)工(gong)(gong)內允許(xu)多(duo)的(de)零(ling)件，可按其(qi)布局特點將加(jia)(jia)工(gong)(gong)片面(mian)(mian)(mian)分成(cheng)幾個(ge)片面(mian)(mian)(mian)，如內形、外形、曲面(mian)(mian)(mian)或平面(mian)(mian)(mian)等。普通先(xian)(xian)加(jia)(jia)工(gong)(gong)平面(mian)(mian)(mian)、定位(wei)面(mian)(mian)(mian)，后加(jia)(jia)工(gong)(gong)孔;先(xian)(xian)加(jia)(jia)工(gong)(gong)簡略的(de)多(duo)少樣(yang)式(shi)，再加(jia)(jia)工(gong)(gong)復雜(za)的(de)多(duo)少樣(yang)式(shi);先(xian)(xian)加(jia)(jia)工(gong)(gong)精度較低的(de)部位(wei)，再加(jia)(jia)工(gong)(gong)精度要求(qiu)較高的(de)部位(wei)。
3、以(yi)粗、精加工(gong)分(fen)序(xu)法。
根據零件的(de)加(jia)(jia)(jia)工(gong)(gong)(gong)精(jing)度、剛(gang)度和變形等因(yin)從來辨別(bie)工(gong)(gong)(gong)序(xu)(xu)時，可(ke)按粗、精(jing)加(jia)(jia)(jia)工(gong)(gong)(gong)分(fen)離的(de)規則來辨別(bie)工(gong)(gong)(gong)序(xu)(xu)，即先粗加(jia)(jia)(jia)工(gong)(gong)(gong)再精(jing)加(jia)(jia)(jia)工(gong)(gong)(gong)，此時可(ke)用差(cha)別(bie)的(de)機床或差(cha)別(bie)的(de)刀具舉行(xing)加(jia)(jia)(jia)工(gong)(gong)(gong);關于易發生加(jia)(jia)(jia)工(gong)(gong)(gong)變形的(de)零件，由于粗加(jia)(jia)(jia)工(gong)(gong)(gong)后可(ke)能發生的(de)變形而(er)需要舉行(xing)校形，故普(pu)通來說凡(fan)要舉行(xing)粗、精(jing)加(jia)(jia)(jia)工(gong)(gong)(gong)的(de)都(dou)要將工(gong)(gong)(gong)序(xu)(xu)分(fen)離。