零(ling)件加工的(de)(de)(de)(de)幾(ji)何(he)形狀精度主(zhu)要(yao)是(shi)指軸頸、外(wai)錐(zhui)面(mian)、莫氏錐(zhui)孔等的(de)(de)(de)(de)圓(yuan)度、圓(yuan)柱度等，一(yi)般應(ying)(ying)將(jiang)(jiang)其(qi)公差(cha)限制在(zai)(zai)尺寸公差(cha)范圍內。對精度要(yao)求較高的(de)(de)(de)(de)內外(wai)圓(yuan)表(biao)(biao)面(mian)，應(ying)(ying)在(zai)(zai)圖(tu)紙(zhi)上標注其(qi)允許(xu)偏差(cha)。零(ling)件加工表(biao)(biao)面(mian)上，不應(ying)(ying)有(you)劃(hua)痕、擦傷(shang)等損(sun)傷(shang)零(ling)件表(biao)(biao)面(mian)的(de)(de)(de)(de)缺(que)陷(xian)(xian)，加工的(de)(de)(de)(de)螺紋表(biao)(biao)面(mian)不允許(xu)有(you)黑(hei)皮(pi)、磕碰、亂(luan)扣和毛(mao)刺等缺(que)陷(xian)(xian)。所有(you)需要(yao)進行涂(tu)裝(zhuang)的(de)(de)(de)(de)鋼(gang)鐵制件表(biao)(biao)面(mian)在(zai)(zai)涂(tu)漆前，必須將(jiang)(jiang)鐵銹(xiu)、氧化皮(pi)、油脂、灰塵、泥土、鹽和污物等除去。機(ji)械加工是(shi)一(yi)種用加工機(ji)械對工件的(de)(de)(de)(de)外(wai)形尺寸或性能(neng)進行改變的(de)(de)(de)(de)過(guo)程。按被加工的(de)(de)(de)(de)工件處于的(de)(de)(de)(de)溫度狀態(tai)﹐分(fen)為冷加工和熱(re)加工。

產(chan)(chan)(chan)品(pin)在加(jia)(jia)(jia)工(gong)(gong)(gong)的(de)(de)時(shi)(shi)候，根據不(bu)(bu)同(tong)(tong)的(de)(de)產(chan)(chan)(chan)品(pin)要(yao)(yao)(yao)求要(yao)(yao)(yao)進(jin)行(xing)(xing)(xing)(xing)不(bu)(bu)同(tong)(tong)程度(du)的(de)(de)加(jia)(jia)(jia)工(gong)(gong)(gong)，加(jia)(jia)(jia)工(gong)(gong)(gong)程度(du)需要(yao)(yao)(yao)進(jin)行(xing)(xing)(xing)(xing)劃分，如果對精(jing)度(du)要(yao)(yao)(yao)求不(bu)(bu)高，機械加(jia)(jia)(jia)工(gong)(gong)(gong)報價單，那么進(jin)行(xing)(xing)(xing)(xing)一(yi)(yi)(yi)個(ge)(ge)簡單的(de)(de)粗加(jia)(jia)(jia)工(gong)(gong)(gong)階段就行(xing)(xing)(xing)(xing)了。產(chan)(chan)(chan)品(pin)的(de)(de)進(jin)度(du)要(yao)(yao)(yao)求越來(lai)越嚴格，后續就要(yao)(yao)(yao)進(jin)行(xing)(xing)(xing)(xing)半精(jing)加(jia)(jia)(jia)工(gong)(gong)(gong)和精(jing)加(jia)(jia)(jia)工(gong)(gong)(gong)階段。零部件(jian)上(shang)面(mian)有多(duo)個(ge)(ge)型(xing)腔(qiang)(qiang)，加(jia)(jia)(jia)工(gong)(gong)(gong)的(de)(de)時(shi)(shi)候，不(bu)(bu)宜采用一(yi)(yi)(yi)個(ge)(ge)型(xing)腔(qiang)(qiang)一(yi)(yi)(yi)個(ge)(ge)型(xing)腔(qiang)(qiang)的(de)(de)加(jia)(jia)(jia)工(gong)(gong)(gong)方式進(jin)行(xing)(xing)(xing)(xing)加(jia)(jia)(jia)工(gong)(gong)(gong)排列(lie)，大型(xing)機械加(jia)(jia)(jia)工(gong)(gong)(gong)，這(zhe)樣很(hen)容(rong)易造成零部件(jian)受(shou)力(li)不(bu)(bu)均勻而產(chan)(chan)(chan)生(sheng)(sheng)(sheng)變形，安徽機械加(jia)(jia)(jia)工(gong)(gong)(gong)，采用分層多(duo)次加(jia)(jia)(jia)工(gong)(gong)(gong)，每(mei)一(yi)(yi)(yi)層盡量同(tong)(tong)時(shi)(shi)加(jia)(jia)(jia)工(gong)(gong)(gong)到(dao)所(suo)有的(de)(de)型(xing)腔(qiang)(qiang)，然后在加(jia)(jia)(jia)工(gong)(gong)(gong)上(shang)下一(yi)(yi)(yi)個(ge)(ge)層次，讓零件(jian)均勻受(shou)力(li)減小(xiao)發生(sheng)(sheng)(sheng)形變的(de)(de)概率。機械加(jia)(jia)(jia)工(gong)(gong)(gong)具備著非(fei)(fei)常靈活的(de)(de)制造能力(li)，還能大批(pi)量生(sheng)(sheng)(sheng)產(chan)(chan)(chan)，可以(yi)生(sheng)(sheng)(sheng)產(chan)(chan)(chan)出(chu)(chu)非(fei)(fei)常精(jing)密(mi)的(de)(de)機加(jia)(jia)(jia)工(gong)(gong)(gong)零件(jian)，可以(yi)在很(hen)短的(de)(de)時(shi)(shi)間里面(mian)生(sheng)(sheng)(sheng)產(chan)(chan)(chan)出(chu)(chu)完全不(bu)(bu)同(tong)(tong)的(de)(de)產(chan)(chan)(chan)品(pin)。

機(ji)(ji)械(xie)加(jia)工設(she)備使用的材料(liao)須符(fu)合(he)安(an)全(quan)環(huan)保要求，不允許使用對(dui)人體(ti)有害和未經安(an)全(quan)部門檢驗合(he)格的材料(liao)。精密機(ji)(ji)械(xie)加(jia)工的形(xing)式根據不同的材質工件(jian)(jian)和產品(pin)的要求而(er)有所(suo)差別。傳統的精密機(ji)(ji)械(xie)加(jia)工方(fang)(fang)法就是我們經常聽(ting)到的車(che)、鉗、洗、刨、磨這些。而(er)隨著機(ji)(ji)械(xie)科技的發展，在(zai)精密機(ji)(ji)械(xie)加(jia)工方(fang)(fang)面(mian)(mian)(mian)，還出現了電鍍、線切割(ge)、鑄(zhu)造、鍛造和粉末加(jia)工等等。對(dui)零(ling)件(jian)(jian)進行這一(yi)工序呢，一(yi)般通過精密車(che)削(xue)，研(yan)磨等操作(zuo)，常常能(neng)讓那些有色金屬材料(liao)制作(zuo)的零(ling)件(jian)(jian)表面(mian)(mian)(mian)形(xing)成一(yi)定的光潔(jie)表面(mian)(mian)(mian)，比如我們常說的鏡面(mian)(mian)(mian)效果。