精密(mi)零件(jian)加工(gong)是一(yi)種機械(xie)加工(gong)，更加精準(zhun)，是較(jiao)高的生產機械(xie)和加工(gong)工(gong)藝。伴隨著(zhu)現(xian)代化的發展，精密(mi)機械(xie)加工(gong)的類型越來越多(duo)，方位越來越細，越來越系統(tong)化。機械(xie)設備由很多(duo)不一(yi)樣(yang)的小零件(jian)構成，每一(yi)個零件(jian)都起(qi)著(zhu)重要的作用。

為(wei)了更(geng)好地保證精(jing)密零(ling)(ling)件(jian)(jian)(jian)(jian)(jian)加工(gong)(gong)精(jing)密度，將(jiang)初(chu)加工(gong)(gong)和(he)深(shen)度加工(gong)(gong)的(de)(de)(de)(de)機(ji)械零(ling)(ling)件(jian)(jian)(jian)(jian)(jian)分(fen)離。因(yin)為(wei)在(zai)加工(gong)(gong)不光滑的(de)(de)(de)(de)機(ji)械零(ling)(ling)件(jian)(jian)(jian)(jian)(jian)時要開展(zhan)很多鉆(zhan)削，產品工(gong)(gong)件(jian)(jian)(jian)(jian)(jian)承擔很大的(de)(de)(de)(de)切(qie)削速(su)度，夾持(chi)力，熱值多，而且機(ji)械零(ling)(ling)件(jian)(jian)(jian)(jian)(jian)的(de)(de)(de)(de)表層(ceng)具(ju)備顯(xian)著的(de)(de)(de)(de)冷作(zuo)硬化(hua)狀況，存(cun)有較(jiao)大的(de)(de)(de)(de)內部地應(ying)力。如何(he)持(chi)續(xu)加工(gong)(gong)粗機(ji)械零(ling)(ling)件(jian)(jian)(jian)(jian)(jian)和(he)細致機(ji)械零(ling)(ling)件(jian)(jian)(jian)(jian)(jian)，因(yin)地應(ying)力的(de)(de)(de)(de)再次遍(bian)布，深(shen)度加工(gong)(gong)后零(ling)(ling)件(jian)(jian)(jian)(jian)(jian)的(de)(de)(de)(de)精(jing)密度將(jiang)迅速(su)缺(que)失。精(jing)密零(ling)(ling)件(jian)(jian)(jian)(jian)(jian)加工(gong)(gong)線路中，常(chang)分(fen)配(pei)熱處理(li)(li)方(fang)法。熱處理(li)(li)工(gong)(gong)藝全過程(cheng)的(de)(de)(de)(de)部位分(fen)配(pei)：為(wei)了更(geng)好地提(ti)升金屬材料的(de)(de)(de)(de)加工(gong)(gong)性，如淬(cui)火、熱處理(li)(li)等(deng)一般分(fen)配(pei)在(zai)機(ji)械零(ling)(ling)件(jian)(jian)(jian)(jian)(jian)加工(gong)(gong)前(qian)開展(zhan)。

在機(ji)械制(zhi)造業的(de)發展中，大家越來越關心精密(mi)零件加(jia)工(gong)(gong)工(gong)(gong)藝的(de)品質，選用有關的(de)方式方法開展解(jie)決，進一(yi)步提高了(le)精密(mi)零件加(jia)工(gong)(gong)的(de)精密(mi)度。