精(jing)密(mi)(mi)零件(jian)行業的(de)(de)(de)標準(zhun)是非常嚴格的(de)(de)(de)，加(jia)(jia)工時候有進刀，出刀等不同(tong)(tong)(tong)的(de)(de)(de)流程工序。尺寸也會(hui)根據(ju)產品(pin)有不同(tong)(tong)(tong)的(de)(de)(de)具體需求，加(jia)(jia)工精(jing)度的(de)(de)(de)要求也會(hui)不同(tong)(tong)(tong)，總體來(lai)說精(jing)密(mi)(mi)加(jia)(jia)工精(jing)度的(de)(de)(de)要求是非常高的(de)(de)(de)，有時候甚至精(jing)確到1mm下的(de)(de)(de)多(duo)(duo)少微米差別(bie)，尺寸如果差別(bie)很大產品(pin)就(jiu)會(hui)成為廢(fei)品(pin)，就(jiu)需要返工來(lai)達到要求，這個過程非常費(fei)時費(fei)力，有時候會(hui)使(shi)得所有的(de)(de)(de)原(yuan)材料報廢(fei)，造成成本的(de)(de)(de)增(zeng)加(jia)(jia)，與此(ci)同(tong)(tong)(tong)時零件(jian)也必然是無法用了(le)，因(yin)此(ci)精(jing)密(mi)(mi)零件(jian)加(jia)(jia)工是有很多(duo)(duo)要求的(de)(de)(de)。那么精(jing)密(mi)(mi)零件(jian)加(jia)(jia)工有哪些要求呢？

(1)通常為了(le)確保(bao)零件(jian)(jian)的(de)加工(gong)(gong)(gong)(gong)精(jing)(jing)度(du)，粗零件(jian)(jian)與精(jing)(jing)密機械零件(jian)(jian)的(de)加工(gong)(gong)(gong)(gong)必(bi)須分開來(lai)運行，因(yin)為粗零件(jian)(jian)加工(gong)(gong)(gong)(gong)與精(jing)(jing)密零件(jian)(jian)加工(gong)(gong)(gong)(gong)的(de)切(qie)削量(liang)，夾(jia)緊力(li)，發(fa)熱量(liang)，工(gong)(gong)(gong)(gong)件(jian)(jian)所受的(de)切(qie)削力(li)都不一樣，如果粗加工(gong)(gong)(gong)(gong)與精(jing)(jing)密加工(gong)(gong)(gong)(gong)連(lian)續(xu)進行，精(jing)(jing)密加工(gong)(gong)(gong)(gong)零件(jian)(jian)的(de)精(jing)(jing)度(du)會因(yin)為應力(li)的(de)不同而(er)喪失。

(2)設備選用的(de)(de)(de)合理性。粗零(ling)件的(de)(de)(de)加工(gong)對加工(gong)精(jing)度的(de)(de)(de)要(yao)求并(bing)不高，只是主要(yao)對加工(gong)余量切割，所(suo)以精(jing)密(mi)加工(gong)要(yao)求在(zai)非常高精(jing)度的(de)(de)(de)機(ji)床加工(gong)。

(3)在精密零(ling)(ling)件加工(gong)(gong)(gong)工(gong)(gong)(gong)藝路線中，常安排有熱(re)處理工(gong)(gong)(gong)序。熱(re)處理工(gong)(gong)(gong)序位(wei)置的安排如(ru)(ru)下：為改善(shan)金(jin)屬的切削加工(gong)(gong)(gong)性能，如(ru)(ru)退火(huo)、正火(huo)、調質(zhi)等，一般安排在機械零(ling)(ling)件加工(gong)(gong)(gong)前進行。

(4)一般來(lai)說精(jing)密零件加(jia)工(gong)幾乎都有熱處理工(gong)序，熱處理工(gong)序能夠改善金屬的切削加(jia)工(gong)性能。

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