精(jing)(jing)(jing)密(mi)零件(jian)(jian)行業的(de)(de)標(biao)準是(shi)(shi)(shi)非(fei)常(chang)嚴格的(de)(de)，加(jia)工(gong)(gong)時候(hou)有進刀(dao)，出刀(dao)等不(bu)同(tong)(tong)的(de)(de)流程工(gong)(gong)序。尺寸也(ye)會(hui)根據產品有不(bu)同(tong)(tong)的(de)(de)具體需求(qiu)(qiu)(qiu)，加(jia)工(gong)(gong)精(jing)(jing)(jing)度的(de)(de)要(yao)求(qiu)(qiu)(qiu)也(ye)會(hui)不(bu)同(tong)(tong)，總體來說精(jing)(jing)(jing)密(mi)加(jia)工(gong)(gong)精(jing)(jing)(jing)度的(de)(de)要(yao)求(qiu)(qiu)(qiu)是(shi)(shi)(shi)非(fei)常(chang)高的(de)(de)，有時候(hou)甚至精(jing)(jing)(jing)確到(dao)1mm下的(de)(de)多少微米差(cha)別(bie)，尺寸如(ru)果(guo)差(cha)別(bie)很大產品就(jiu)會(hui)成為廢品，就(jiu)需要(yao)返工(gong)(gong)來達(da)到(dao)要(yao)求(qiu)(qiu)(qiu)，這個過程非(fei)常(chang)費時費力，有時候(hou)會(hui)使得(de)所(suo)有的(de)(de)原材料報廢，造成成本(ben)的(de)(de)增加(jia)，與此同(tong)(tong)時零件(jian)(jian)也(ye)必然(ran)是(shi)(shi)(shi)無法(fa)用了，因(yin)此精(jing)(jing)(jing)密(mi)零件(jian)(jian)加(jia)工(gong)(gong)是(shi)(shi)(shi)有很多要(yao)求(qiu)(qiu)(qiu)的(de)(de)。那么精(jing)(jing)(jing)密(mi)零件(jian)(jian)加(jia)工(gong)(gong)有哪些(xie)要(yao)求(qiu)(qiu)(qiu)呢(ni)？

(1)通常為了確保零(ling)件(jian)(jian)(jian)的加(jia)(jia)工(gong)(gong)(gong)精(jing)度(du)，粗(cu)零(ling)件(jian)(jian)(jian)與精(jing)密(mi)機(ji)械零(ling)件(jian)(jian)(jian)的加(jia)(jia)工(gong)(gong)(gong)必須分開來(lai)運行，因為粗(cu)零(ling)件(jian)(jian)(jian)加(jia)(jia)工(gong)(gong)(gong)與精(jing)密(mi)零(ling)件(jian)(jian)(jian)加(jia)(jia)工(gong)(gong)(gong)的切削量(liang)(liang)，夾(jia)緊力(li)，發熱量(liang)(liang)，工(gong)(gong)(gong)件(jian)(jian)(jian)所受的切削力(li)都不(bu)一(yi)樣，如(ru)果粗(cu)加(jia)(jia)工(gong)(gong)(gong)與精(jing)密(mi)加(jia)(jia)工(gong)(gong)(gong)連續進行，精(jing)密(mi)加(jia)(jia)工(gong)(gong)(gong)零(ling)件(jian)(jian)(jian)的精(jing)度(du)會(hui)因為應(ying)力(li)的不(bu)同而喪失。

(2)設備(bei)選用的合理(li)性(xing)。粗(cu)零件的加工(gong)對加工(gong)精度的要(yao)(yao)求并(bing)不高，只是主要(yao)(yao)對加工(gong)余量切(qie)割，所以精密加工(gong)要(yao)(yao)求在非常高精度的機床加工(gong)。

(3)在精密零件加工(gong)(gong)(gong)工(gong)(gong)(gong)藝路(lu)線(xian)中，常安排有熱(re)處理工(gong)(gong)(gong)序(xu)。熱(re)處理工(gong)(gong)(gong)序(xu)位置的安排如下：為改善金屬的切削加工(gong)(gong)(gong)性能，如退火(huo)、正火(huo)、調質等(deng)，一般安排在機(ji)械零件加工(gong)(gong)(gong)前進(jin)行。

(4)一(yi)般(ban)來說精密零件加(jia)工(gong)幾乎都有熱處理工(gong)序(xu)，熱處理工(gong)序(xu)能夠改善(shan)金(jin)屬的切削加(jia)工(gong)性能。

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