精密(mi)(mi)零件(jian)(jian)行業(ye)的(de)(de)(de)標準是(shi)(shi)(shi)非常(chang)嚴格的(de)(de)(de)，加(jia)工(gong)(gong)(gong)時候有(you)(you)進刀(dao)，出刀(dao)等不同(tong)(tong)的(de)(de)(de)流程工(gong)(gong)(gong)序(xu)。尺(chi)寸也會根據產品(pin)有(you)(you)不同(tong)(tong)的(de)(de)(de)具體(ti)(ti)需(xu)求(qiu)，加(jia)工(gong)(gong)(gong)精度的(de)(de)(de)要(yao)求(qiu)也會不同(tong)(tong)，總體(ti)(ti)來(lai)說精密(mi)(mi)加(jia)工(gong)(gong)(gong)精度的(de)(de)(de)要(yao)求(qiu)是(shi)(shi)(shi)非常(chang)高的(de)(de)(de)，有(you)(you)時候甚至(zhi)精確到1mm下(xia)的(de)(de)(de)多(duo)少微(wei)米差別，尺(chi)寸如果差別很(hen)大產品(pin)就會成(cheng)為廢品(pin)，就需(xu)要(yao)返工(gong)(gong)(gong)來(lai)達到要(yao)求(qiu)，這個過程非常(chang)費時費力，有(you)(you)時候會使(shi)得所有(you)(you)的(de)(de)(de)原材料報廢，造成(cheng)成(cheng)本的(de)(de)(de)增加(jia)，與此同(tong)(tong)時零件(jian)(jian)也必然是(shi)(shi)(shi)無法用了，因此精密(mi)(mi)零件(jian)(jian)加(jia)工(gong)(gong)(gong)是(shi)(shi)(shi)有(you)(you)很(hen)多(duo)要(yao)求(qiu)的(de)(de)(de)。那么(me)精密(mi)(mi)零件(jian)(jian)加(jia)工(gong)(gong)(gong)有(you)(you)哪些要(yao)求(qiu)呢？

(1)通常為(wei)了確保零件(jian)(jian)(jian)(jian)的(de)加(jia)工(gong)(gong)(gong)精(jing)度，粗零件(jian)(jian)(jian)(jian)與(yu)精(jing)密機械零件(jian)(jian)(jian)(jian)的(de)加(jia)工(gong)(gong)(gong)必須分開來運行(xing)，因為(wei)粗零件(jian)(jian)(jian)(jian)加(jia)工(gong)(gong)(gong)與(yu)精(jing)密零件(jian)(jian)(jian)(jian)加(jia)工(gong)(gong)(gong)的(de)切削量，夾緊力(li)，發熱量，工(gong)(gong)(gong)件(jian)(jian)(jian)(jian)所受的(de)切削力(li)都不(bu)一樣，如果粗加(jia)工(gong)(gong)(gong)與(yu)精(jing)密加(jia)工(gong)(gong)(gong)連續進行(xing)，精(jing)密加(jia)工(gong)(gong)(gong)零件(jian)(jian)(jian)(jian)的(de)精(jing)度會因為(wei)應力(li)的(de)不(bu)同(tong)而喪失。

(2)設備選用(yong)的(de)合理性。粗零件的(de)加(jia)工(gong)對(dui)加(jia)工(gong)精(jing)度的(de)要(yao)求并不高，只(zhi)是主(zhu)要(yao)對(dui)加(jia)工(gong)余(yu)量切割(ge)，所以精(jing)密加(jia)工(gong)要(yao)求在非常高精(jing)度的(de)機床加(jia)工(gong)。

(3)在精密零(ling)件加工(gong)工(gong)藝路線中(zhong)，常(chang)安排有熱(re)處理工(gong)序(xu)。熱(re)處理工(gong)序(xu)位置的安排如下：為改善金屬的切(qie)削加工(gong)性能，如退火、正(zheng)火、調質等，一般安排在機械零(ling)件加工(gong)前進行。

(4)一般(ban)來說精密零件加(jia)工幾(ji)乎都有熱(re)處理工序，熱(re)處理工序能夠改善金屬的切削加(jia)工性能。

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