機(ji)械加工工藝(yi)規(gui)(gui)程是(shi)規(gui)(gui)定零件(jian)機(ji)械加工工藝(yi)過程和操作方(fang)法等的(de)工藝(yi)文(wen)件(jian)之(zhi)一(yi)，它是(shi)在具(ju)體的(de)生產(chan)條件(jian)下，把較為合(he)理(li)的(de)工藝(yi)過程和操作方(fang)法，按(an)照(zhao)規(gui)(gui)定的(de)形(xing)式書寫(xie)成(cheng)工藝(yi)文(wen)件(jian)，經審批后(hou)用來指(zhi)導(dao)生產(chan)。

西安非(fei)標機械加工

機械加工(gong)(gong)工(gong)(gong)藝(yi)規程一般包括以(yi)下(xia)內(nei)容(rong)：工(gong)(gong)件(jian)加工(gong)(gong)的工(gong)(gong)藝(yi)路線、各工(gong)(gong)序的具體(ti)內(nei)容(rong)及所用(yong)的設備和工(gong)(gong)藝(yi)裝備、工(gong)(gong)件(jian)的檢驗(yan)項(xiang)目及檢驗(yan)方法、切(qie)削用(yong)量、時間(jian)定額等。

對箱體件，一般以(yi)(yi)主孔為(wei)粗(cu)基(ji)(ji)準加(jia)工(gong)(gong)平面(mian)(mian)，再以(yi)(yi)平面(mian)(mian)為(wei)精基(ji)(ji)準加(jia)工(gong)(gong)孔系；對軸類零件，一般以(yi)(yi)外圓(yuan)為(wei)粗(cu)基(ji)(ji)準加(jia)工(gong)(gong)中心(xin)(xin)孔，再以(yi)(yi)中心(xin)(xin)孔為(wei)精基(ji)(ji)準加(jia)工(gong)(gong)外圓(yuan)、端面(mian)(mian)等表(biao)面(mian)(mian)。如存在(zai)多個(ge)精密基(ji)(ji)準，應按(an)基(ji)(ji)準轉換的次序和(he)逐步提(ti)高加(jia)工(gong)(gong)精度的原則，安排基(ji)(ji)面(mian)(mian)和(he)主面(mian)(mian)的加(jia)工(gong)(gong)。

對(dui)箱、架、桿等(deng)工(gong)(gong)(gong)件，應先加工(gong)(gong)(gong)平面(mian)(mian)，然(ran)后(hou)再(zai)加工(gong)(gong)(gong)孔(kong)。因為(wei)平面(mian)(mian)輪廓平坦，面(mian)(mian)積(ji)大，先加工(gong)(gong)(gong)平面(mian)(mian)，然(ran)后(hou)用平面(mian)(mian)定位孔(kong)，既能(neng)(neng)保證(zheng)孔(kong)有穩定可靠的定位基準，又(you)能(neng)(neng)保證(zheng)孔(kong)與平面(mian)(mian)的位置精(jing)度。

對非標準件的加工和切(qie)割工藝安排的一般(ban)原則是，前期工作(zuo)必須為(wei)后續工作(zuo)做(zuo)好準備，打好基礎，提(ti)供優質服務。