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(shu)散(san)的規則，要(yao)根據(ju)實際環(huan)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(hui)集分序(xu)法。
這(zhe)種(zhong)辦法(fa)是按(an)所用(yong)(yong)(yong)刀(dao)具辨別工(gong)序，用(yong)(yong)(yong)同一把(ba)刀(dao)具加(jia)(jia)工(gong)完零(ling)件(jian)上全部(bu)(bu)(bu)可(ke)(ke)(ke)以結束的(de)部(bu)(bu)(bu)位(wei)。為了減(jian)(jian)少換(huan)刀(dao)時(shi)(shi)候(hou)，緊(jin)縮(suo)空(kong)程時(shi)(shi)候(hou)，減(jian)(jian)少無(wu)謂(wei)要(yao)的(de)定(ding)位(wei)差(cha)錯，可(ke)(ke)(ke)按(an)刀(dao)具會集工(gong)序的(de)辦法(fa)加(jia)(jia)工(gong)零(ling)件(jian)，即在一次裝夾(jia)中，盡可(ke)(ke)(ke)能(neng)(neng)用(yong)(yong)(yong)一把(ba)刀(dao)具加(jia)(jia)工(gong)出可(ke)(ke)(ke)能(neng)(neng)加(jia)(jia)工(gong)的(de)所用(yong)(yong)(yong)部(bu)(bu)(bu)位(wei)，而后再換(huan)另一把(ba)刀(dao)加(jia)(jia)工(gong)其余(yu)部(bu)(bu)(bu)位(wei)。這(zhe)樣可(ke)(ke)(ke)減(jian)(jian)少換(huan)刀(dao)次數(shu)，緊(jin)縮(suo)空(kong)程時(shi)(shi)候(hou)，減(jian)(jian)少無(wu)謂(wei)要(yao)的(de)定(ding)位(wei)差(cha)錯。
2、以加工部位分序(xu)法(fa)。
每個零件布局樣式(shi)差別(bie)(bie)，各(ge)表面的(de)技能(neng)要求(qiu)也(ye)有所(suo)差別(bie)(bie)，故(gu)加工(gong)時，其(qi)定(ding)位技巧各(ge)有差異(yi)，于是可根據(ju)定(ding)位技巧的(de)差別(bie)(bie)來辨別(bie)(bie)工(gong)序。
關于(yu)加(jia)(jia)工(gong)(gong)內允(yun)許多的零(ling)件，可按其(qi)布局特點將加(jia)(jia)工(gong)(gong)片(pian)面分(fen)成幾個片(pian)面，如內形(xing)、外形(xing)、曲面或平面等。普通先(xian)(xian)加(jia)(jia)工(gong)(gong)平面、定位面，后加(jia)(jia)工(gong)(gong)孔(kong);先(xian)(xian)加(jia)(jia)工(gong)(gong)簡略(lve)的多少樣式(shi)，再(zai)(zai)加(jia)(jia)工(gong)(gong)復雜的多少樣式(shi);先(xian)(xian)加(jia)(jia)工(gong)(gong)精度較低的部(bu)位，再(zai)(zai)加(jia)(jia)工(gong)(gong)精度要求較高的部(bu)位。
3、以(yi)粗、精(jing)加工分(fen)序法。
根(gen)據零(ling)件的(de)加(jia)(jia)工(gong)(gong)(gong)精度、剛度和變形(xing)等因從來辨別(bie)工(gong)(gong)(gong)序時，可按粗(cu)、精加(jia)(jia)工(gong)(gong)(gong)分離的(de)規則來辨別(bie)工(gong)(gong)(gong)序，即先粗(cu)加(jia)(jia)工(gong)(gong)(gong)再(zai)精加(jia)(jia)工(gong)(gong)(gong)，此時可用差(cha)別(bie)的(de)機床(chuang)或(huo)差(cha)別(bie)的(de)刀具舉行(xing)加(jia)(jia)工(gong)(gong)(gong);關(guan)于易發生加(jia)(jia)工(gong)(gong)(gong)變形(xing)的(de)零(ling)件，由(you)于粗(cu)加(jia)(jia)工(gong)(gong)(gong)后(hou)可能發生的(de)變形(xing)而需(xu)要(yao)舉行(xing)校形(xing)，故普通來說(shuo)凡(fan)要(yao)舉行(xing)粗(cu)、精加(jia)(jia)工(gong)(gong)(gong)的(de)都(dou)要(yao)將工(gong)(gong)(gong)序分離。