精密(mi)零(ling)(ling)件(jian)(jian)行業(ye)的(de)(de)標(biao)準是(shi)(shi)非常嚴(yan)格(ge)的(de)(de)，加(jia)工(gong)(gong)時(shi)候(hou)有(you)(you)進刀，出刀等不同的(de)(de)流(liu)程(cheng)工(gong)(gong)序。尺(chi)寸(cun)也(ye)會根據(ju)產(chan)(chan)品有(you)(you)不同的(de)(de)具體(ti)需(xu)求(qiu)，加(jia)工(gong)(gong)精度(du)的(de)(de)要(yao)(yao)(yao)求(qiu)也(ye)會不同，總體(ti)來說精密(mi)加(jia)工(gong)(gong)精度(du)的(de)(de)要(yao)(yao)(yao)求(qiu)是(shi)(shi)非常高的(de)(de)，有(you)(you)時(shi)候(hou)甚至精確到1mm下的(de)(de)多(duo)(duo)少微米差別(bie)，尺(chi)寸(cun)如果(guo)差別(bie)很(hen)大產(chan)(chan)品就會成(cheng)為廢品，就需(xu)要(yao)(yao)(yao)返工(gong)(gong)來達到要(yao)(yao)(yao)求(qiu)，這個過程(cheng)非常費時(shi)費力，有(you)(you)時(shi)候(hou)會使(shi)得所有(you)(you)的(de)(de)原材料報廢，造成(cheng)成(cheng)本的(de)(de)增加(jia)，與此同時(shi)零(ling)(ling)件(jian)(jian)也(ye)必然是(shi)(shi)無法用(yong)了，因此精密(mi)零(ling)(ling)件(jian)(jian)加(jia)工(gong)(gong)是(shi)(shi)有(you)(you)很(hen)多(duo)(duo)要(yao)(yao)(yao)求(qiu)的(de)(de)。那么精密(mi)零(ling)(ling)件(jian)(jian)加(jia)工(gong)(gong)有(you)(you)哪些要(yao)(yao)(yao)求(qiu)呢？

(1)通常為(wei)了確保零(ling)件的(de)(de)加(jia)(jia)(jia)(jia)工精(jing)(jing)(jing)度(du)，粗零(ling)件與(yu)精(jing)(jing)(jing)密(mi)機械零(ling)件的(de)(de)加(jia)(jia)(jia)(jia)工必須分開來運(yun)行，因為(wei)粗零(ling)件加(jia)(jia)(jia)(jia)工與(yu)精(jing)(jing)(jing)密(mi)零(ling)件加(jia)(jia)(jia)(jia)工的(de)(de)切(qie)削(xue)量，夾緊(jin)力(li)(li)，發熱量，工件所受的(de)(de)切(qie)削(xue)力(li)(li)都不一樣(yang)，如(ru)果粗加(jia)(jia)(jia)(jia)工與(yu)精(jing)(jing)(jing)密(mi)加(jia)(jia)(jia)(jia)工連(lian)續進行，精(jing)(jing)(jing)密(mi)加(jia)(jia)(jia)(jia)工零(ling)件的(de)(de)精(jing)(jing)(jing)度(du)會因為(wei)應力(li)(li)的(de)(de)不同而(er)喪失。

(2)設備選用的合理性。粗零件的加(jia)(jia)工(gong)(gong)(gong)(gong)對加(jia)(jia)工(gong)(gong)(gong)(gong)精(jing)度的要(yao)求并(bing)不(bu)高，只是主要(yao)對加(jia)(jia)工(gong)(gong)(gong)(gong)余量(liang)切割，所以精(jing)密加(jia)(jia)工(gong)(gong)(gong)(gong)要(yao)求在(zai)非常高精(jing)度的機床加(jia)(jia)工(gong)(gong)(gong)(gong)。

(3)在精密零件加工(gong)(gong)工(gong)(gong)藝(yi)路線中，常(chang)安排(pai)有(you)熱(re)處(chu)理(li)工(gong)(gong)序。熱(re)處(chu)理(li)工(gong)(gong)序位置的(de)安排(pai)如下：為(wei)改善金(jin)屬的(de)切削加工(gong)(gong)性(xing)能，如退火、正火、調質等，一般(ban)安排(pai)在機械零件加工(gong)(gong)前進(jin)行。

(4)一(yi)般來說精密零(ling)件加工幾(ji)乎都有熱處理工序，熱處理工序能夠改(gai)善金屬的切削加工性能。

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