精(jing)(jing)密零件行(xing)業(ye)的(de)(de)(de)標(biao)準是(shi)非(fei)常嚴格的(de)(de)(de)，加工(gong)(gong)時(shi)(shi)候有(you)進刀，出(chu)刀等不(bu)(bu)同的(de)(de)(de)流程(cheng)工(gong)(gong)序。尺寸也(ye)會根據產(chan)品有(you)不(bu)(bu)同的(de)(de)(de)具體需(xu)求(qiu)(qiu)，加工(gong)(gong)精(jing)(jing)度的(de)(de)(de)要(yao)求(qiu)(qiu)也(ye)會不(bu)(bu)同，總(zong)體來說精(jing)(jing)密加工(gong)(gong)精(jing)(jing)度的(de)(de)(de)要(yao)求(qiu)(qiu)是(shi)非(fei)常高的(de)(de)(de)，有(you)時(shi)(shi)候甚至(zhi)精(jing)(jing)確到1mm下(xia)的(de)(de)(de)多少微米(mi)差別，尺寸如果差別很(hen)大產(chan)品就(jiu)會成為廢品，就(jiu)需(xu)要(yao)返工(gong)(gong)來達到要(yao)求(qiu)(qiu)，這個(ge)過(guo)程(cheng)非(fei)常費時(shi)(shi)費力，有(you)時(shi)(shi)候會使得所有(you)的(de)(de)(de)原材料報廢，造成成本的(de)(de)(de)增加，與此(ci)同時(shi)(shi)零件也(ye)必然是(shi)無法(fa)用(yong)了，因(yin)此(ci)精(jing)(jing)密零件加工(gong)(gong)是(shi)有(you)很(hen)多要(yao)求(qiu)(qiu)的(de)(de)(de)。那么(me)精(jing)(jing)密零件加工(gong)(gong)有(you)哪些要(yao)求(qiu)(qiu)呢(ni)？

(1)通(tong)常為了確保零(ling)件(jian)的加(jia)工(gong)(gong)(gong)精(jing)(jing)度，粗零(ling)件(jian)與(yu)精(jing)(jing)密機械零(ling)件(jian)的加(jia)工(gong)(gong)(gong)必須分開來運行(xing)(xing)，因為粗零(ling)件(jian)加(jia)工(gong)(gong)(gong)與(yu)精(jing)(jing)密零(ling)件(jian)加(jia)工(gong)(gong)(gong)的切削量(liang)，夾緊力，發熱量(liang)，工(gong)(gong)(gong)件(jian)所(suo)受的切削力都不(bu)(bu)一(yi)樣，如果(guo)粗加(jia)工(gong)(gong)(gong)與(yu)精(jing)(jing)密加(jia)工(gong)(gong)(gong)連續進行(xing)(xing)，精(jing)(jing)密加(jia)工(gong)(gong)(gong)零(ling)件(jian)的精(jing)(jing)度會因為應力的不(bu)(bu)同而喪失。

(2)設(she)備選(xuan)用的合理性。粗零件的加工(gong)對加工(gong)精(jing)度(du)的要求并不(bu)高(gao)，只是主要對加工(gong)余量切(qie)割，所以(yi)精(jing)密加工(gong)要求在非常高(gao)精(jing)度(du)的機床加工(gong)。

(3)在(zai)精密(mi)零(ling)件(jian)加(jia)(jia)工(gong)工(gong)藝路線中，常安排(pai)有熱處理(li)工(gong)序(xu)。熱處理(li)工(gong)序(xu)位置的安排(pai)如下：為(wei)改(gai)善金屬(shu)的切削加(jia)(jia)工(gong)性能，如退火、正火、調質等，一(yi)般安排(pai)在(zai)機械零(ling)件(jian)加(jia)(jia)工(gong)前進行(xing)。

(4)一般來說(shuo)精(jing)密零件加工(gong)幾乎都有熱處(chu)理(li)工(gong)序，熱處(chu)理(li)工(gong)序能夠(gou)改善金屬(shu)的(de)切削加工(gong)性能。

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