機(ji)(ji)(ji)械(xie)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)設備使(shi)用(yong)的(de)(de)材料(liao)(liao)須符合安全環(huan)保要求，不允許使(shi)用(yong)對人體有害和(he)未經安全部門檢驗合格的(de)(de)材料(liao)(liao)。精密零(ling)件加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)其實是(shi)機(ji)(ji)(ji)械(xie)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)的(de)(de)一種(zhong)，但(dan)是(shi)因(yin)為(wei)對零(ling)件的(de)(de)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)精密度較高，機(ji)(ji)(ji)械(xie)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)價格表，對生產機(ji)(ji)(ji)械(xie)及(ji)流程要求也(ye)比(bi)較高。隨著工(gong)(gong)(gong)(gong)(gong)業化(hua)發展，精密機(ji)(ji)(ji)械(xie)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)分類越(yue)(yue)來越(yue)(yue)多，方向(xiang)越(yue)(yue)來越(yue)(yue)細，馬鞍山機(ji)(ji)(ji)械(xie)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)，越(yue)(yue)來越(yue)(yue)化(hua)。機(ji)(ji)(ji)械(xie)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)是(shi)一種(zhong)用(yong)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)機(ji)(ji)(ji)械(xie)對工(gong)(gong)(gong)(gong)(gong)件的(de)(de)外形尺寸或性能(neng)進(jin)行改變的(de)(de)過(guo)程。按被加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)的(de)(de)工(gong)(gong)(gong)(gong)(gong)件處于的(de)(de)溫度狀(zhuang)態﹐分為(wei)冷加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)和(he)熱(re)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)。

機(ji)械(xie)(xie)加(jia)工主要(yao)(yao)有精(jing)(jing)車(che)、精(jing)(jing)鏜、精(jing)(jing)銑(xian)(xian)、精(jing)(jing)磨和(he)研(yan)磨等(deng)(deng)工藝(yi)。精(jing)(jing)銑(xian)(xian)：用于(yu)加(jia)工形狀(zhuang)復雜的(de)(de)鋁或(huo)鈹合金(jin)結構(gou)件(jian)。依(yi)靠機(ji)床的(de)(de)導軌和(he)主軸的(de)(de)精(jing)(jing)度(du)來獲得較高的(de)(de)相互位(wei)置精(jing)(jing)度(du)。使用經仔細研(yan)磨的(de)(de)金(jin)剛石刀頭進(jin)行(xing)高速銑(xian)(xian)切可獲得準(zhun)確的(de)(de)鏡面。零件(jian)加(jia)工的(de)(de)幾何(he)形狀(zhuang)精(jing)(jing)度(du)主要(yao)(yao)是指軸頸、外錐面、莫氏錐孔等(deng)(deng)的(de)(de)圓(yuan)(yuan)度(du)、圓(yuan)(yuan)柱度(du)等(deng)(deng)，一般應將其(qi)公(gong)差限制在尺寸公(gong)差范圍內。對(dui)精(jing)(jing)度(du)要(yao)(yao)求較高的(de)(de)內外圓(yuan)(yuan)表面，應在圖紙(zhi)上(shang)標注其(qi)允許偏差。進(jin)行(xing)機(ji)械(xie)(xie)加(jia)工的(de)(de)時候一定(ding)要(yao)(yao)先將其(qi)毛刺或(huo)者(zhe)是磕碰傷情況解決以后再放入到里面，這樣就能夠減少齒(chi)輪傳動噪音的(de)(de)出現。

由毛坯變成(cheng)(cheng)成(cheng)(cheng)品的(de)(de)(de)過程中，在某加(jia)工(gong)(gong)表(biao)(biao)面(mian)(mian)(mian)上切除(chu)的(de)(de)(de)金(jin)屬層的(de)(de)(de)總厚(hou)度(du)稱為(wei)該表(biao)(biao)面(mian)(mian)(mian)的(de)(de)(de)加(jia)工(gong)(gong)總余量(liang)(liang)。每一道工(gong)(gong)序所切除(chu)的(de)(de)(de)金(jin)屬層厚(hou)度(du)稱為(wei)工(gong)(gong)序間加(jia)工(gong)(gong)余量(liang)(liang)。機(ji)(ji)械(xie)零(ling)件(jian)(jian)是由若干個(ge)(ge)(ge)表(biao)(biao)面(mian)(mian)(mian)組(zu)成(cheng)(cheng)的(de)(de)(de)，數控機(ji)(ji)械(xie)加(jia)工(gong)(gong)，研(yan)究零(ling)件(jian)(jian)表(biao)(biao)面(mian)(mian)(mian)的(de)(de)(de)相對關系(xi)，機(ji)(ji)械(xie)加(jia)工(gong)(gong)廠家，必(bi)須確定一個(ge)(ge)(ge)基(ji)準，基(ji)準是零(ling)件(jian)(jian)上用來確定其它點、線、面(mian)(mian)(mian)的(de)(de)(de)位置(zhi)所依據的(de)(de)(de)點、線、面(mian)(mian)(mian)。根據基(ji)準的(de)(de)(de)不同功能(neng)，基(ji)準可分(fen)為(wei)設(she)計基(ji)準和(he)工(gong)(gong)藝基(ji)準兩類。精(jing)密和(he)超精(jing)密加(jia)工(gong)(gong)時現代機(ji)(ji)械(xie)加(jia)工(gong)(gong)制造技術的(de)(de)(de)一個(ge)(ge)(ge)重(zhong)要組(zu)成(cheng)(cheng)部分(fen)，是衡(heng)量(liang)(liang)一個(ge)(ge)(ge)國家高科技制造業水平高低(di)的(de)(de)(de)重(zhong)要指標之一。