機械加(jia)工(gong)(gong)是一種(zhong)用(yong)加(jia)工(gong)(gong)機械對工(gong)(gong)件(jian)的(de)外形尺寸或性能(neng)(neng)進行改變(bian)的(de)過(guo)程(cheng)。按被加(jia)工(gong)(gong)的(de)工(gong)(gong)件(jian)處于的(de)溫度狀態(tai)﹐分為(wei)(wei)冷加(jia)工(gong)(gong)和熱加(jia)工(gong)(gong)。機械加(jia)工(gong)(gong)具備著(zhu)非常靈活(huo)的(de)制造能(neng)(neng)力，還能(neng)(neng)大批量(liang)生(sheng)產(chan)(chan)，可(ke)以生(sheng)產(chan)(chan)出非常精密(mi)的(de)機加(jia)工(gong)(gong)零(ling)件(jian)，可(ke)以在(zai)很短的(de)時間(jian)里面生(sheng)產(chan)(chan)出完全不同的(de)產(chan)(chan)品。零(ling)件(jian)在(zai)加(jia)工(gong)(gong)和裝配過(guo)程(cheng)中所使(shi)用(yong)的(de)基(ji)(ji)(ji)準(zhun)，稱為(wei)(wei)工(gong)(gong)藝(yi)基(ji)(ji)(ji)準(zhun)。工(gong)(gong)藝(yi)基(ji)(ji)(ji)準(zhun)按用(yong)途不同，又分為(wei)(wei)定位基(ji)(ji)(ji)準(zhun)、測量(liang)基(ji)(ji)(ji)準(zhun)和裝配基(ji)(ji)(ji)準(zhun)。定位基(ji)(ji)(ji)準(zhun)：天(tian)津機械加(jia)工(gong)(gong)時使(shi)工(gong)(gong)件(jian)在(zai)機床或夾(jia)具中占(zhan)據正(zheng)確位置(zhi)所用(yong)的(de)基(ji)(ji)(ji)準(zhun)，稱為(wei)(wei)定位基(ji)(ji)(ji)準(zhun)。

機(ji)械加(jia)工(gong)基(ji)(ji)準(zhun)按(an)其作用(yong)不(bu)(bu)(bu)同(tong)，可分為設(she)(she)(she)計(ji)基(ji)(ji)準(zhun)和(he)工(gong)藝基(ji)(ji)準(zhun)兩大類。設(she)(she)(she)計(ji)基(ji)(ji)準(zhun)在零件圖上(shang)用(yong)以確定其他點、線(xian)、面的(de)(de)基(ji)(ji)準(zhun)，機(ji)械加(jia)工(gong)公司，稱為設(she)(she)(she)計(ji)基(ji)(ji)準(zhun)，就(jiu)(jiu)活(huo)塞來(lai)說，設(she)(she)(she)計(ji)基(ji)(ji)準(zhun)指(zhi)活(huo)塞中心線(xian)和(he)銷(xiao)孔中心線(xian)。產品(pin)在加(jia)工(gong)的(de)(de)時候，根據不(bu)(bu)(bu)同(tong)的(de)(de)產品(pin)要(yao)求要(yao)進(jin)行(xing)不(bu)(bu)(bu)同(tong)程(cheng)度的(de)(de)加(jia)工(gong)，加(jia)工(gong)程(cheng)度需(xu)要(yao)進(jin)行(xing)劃分，如果對(dui)精(jing)度要(yao)求不(bu)(bu)(bu)高，那么進(jin)行(xing)一個簡單(dan)的(de)(de)粗加(jia)工(gong)階段(duan)就(jiu)(jiu)行(xing)了。產品(pin)的(de)(de)進(jin)度要(yao)求越來(lai)越嚴格，后續就(jiu)(jiu)要(yao)進(jin)行(xing)半精(jing)加(jia)工(gong)和(he)精(jing)加(jia)工(gong)階段(duan)。機(ji)械加(jia)工(gong)是通過機(ji)械設(she)(she)(she)備對(dui)工(gong)件的(de)(de)外形尺寸或性能進(jin)行(xing)改(gai)變的(de)(de)加(jia)工(gong)過程(cheng)，機(ji)械加(jia)工(gong)對(dui)現代工(gong)業生產起到了非常重(zhong)要(yao)的(de)(de)作用(yong)。

產(chan)(chan)品(pin)(pin)在加(jia)(jia)工(gong)(gong)的時候，根(gen)據(ju)不(bu)(bu)同的產(chan)(chan)品(pin)(pin)要(yao)求(qiu)要(yao)進(jin)(jin)行不(bu)(bu)同程度(du)(du)(du)(du)的加(jia)(jia)工(gong)(gong)，加(jia)(jia)工(gong)(gong)程度(du)(du)(du)(du)需(xu)要(yao)進(jin)(jin)行劃分，如果對精(jing)(jing)度(du)(du)(du)(du)要(yao)求(qiu)不(bu)(bu)高，那么進(jin)(jin)行一(yi)個簡單(dan)的粗加(jia)(jia)工(gong)(gong)階(jie)段(duan)就行了。產(chan)(chan)品(pin)(pin)的進(jin)(jin)度(du)(du)(du)(du)要(yao)求(qiu)越來(lai)越嚴格，后續就要(yao)進(jin)(jin)行半精(jing)(jing)加(jia)(jia)工(gong)(gong)和精(jing)(jing)加(jia)(jia)工(gong)(gong)階(jie)段(duan)。精(jing)(jing)密零部件加(jia)(jia)工(gong)(gong)的定義是，亳州機(ji)(ji)械(xie)加(jia)(jia)工(gong)(gong)，按步驟，機(ji)(ji)械(xie)加(jia)(jia)工(gong)(gong)報(bao)價，按工(gong)(gong)序完(wan)成各(ge)主要(yao)表(biao)(biao)面的終加(jia)(jia)工(gong)(gong)，包括工(gong)(gong)件平行度(du)(du)(du)(du)，附近機(ji)(ji)械(xie)加(jia)(jia)工(gong)(gong)廠(chang)，表(biao)(biao)面光潔度(du)(du)(du)(du)，表(biao)(biao)面垂直度(du)(du)(du)(du)，表(biao)(biao)面硬度(du)(du)(du)(du)等等，使(shi)零件的加(jia)(jia)工(gong)(gong)精(jing)(jing)度(du)(du)(du)(du)和加(jia)(jia)工(gong)(gong)表(biao)(biao)面質(zhi)量達到圖樣規(gui)定的要(yao)求(qiu)的過程。高精(jing)(jing)細(xi)機(ji)(ji)械(xie)制造(zao)工(gong)(gong)藝離不(bu)(bu)開高精(jing)(jing)細(xi)設備(bei)的使(shi)用，其中精(jing)(jing)細(xi)設備(bei)的配件產(chan)(chan)品(pin)(pin)需(xu)要(yao)杰(jie)出(chu)的物(wu)理安穩性能作為基礎，尤其是耐(nai)(nai)高溫，耐(nai)(nai)腐(fu)蝕的耐(nai)(nai)久壽命作業，這關于材料的挑選來(lai)說硬質(zhi)合金材料無疑是首要(yao)挑選。