機械加工(gong)(gong)(gong)工(gong)(gong)(gong)藝(yi)(yi)規程(cheng)的(de)擬(ni)定(ding)，大體可分為兩(liang)個(ge)進程(cheng)。首要是擬(ni)定(ding)零件加工(gong)(gong)(gong)的(de)工(gong)(gong)(gong)藝(yi)(yi)道路，然后再斷定(ding)每一(yi)道工(gong)(gong)(gong)序的(de)工(gong)(gong)(gong)序尺度(du)、所(suo)用(yong)設備和工(gong)(gong)(gong)藝(yi)(yi)裝(zhuang)備以及切(qie)削標準、工(gong)(gong)(gong)時(shi)定(ding)額等。這兩(liang)個(ge)進程(cheng)是互相聯(lian)系的(de)，應(ying)進行歸納剖析。 

工(gong)藝道路的(de)擬(ni)定是擬(ni)定工(gong)藝進程的(de)總體(ti)布(bu)局，首要任務是選擇各個外表(biao)的(de)加(jia)工(gong)辦法(fa)，斷定各個外表(biao)的(de)加(jia)工(gong)次序，以及整個工(gong)藝進程中工(gong)序數目(mu)的(de)多少等。 

擬定工藝道路的一(yi)(yi)般準則-上(shang)海機械加工廠家小(xiao)編來為我們(men)一(yi)(yi)一(yi)(yi)道來：

1、先(xian)加工基準面 

零件在加工(gong)(gong)進程(cheng)中，作為(wei)(wei)定位基(ji)準的(de)外表應首要加工(gong)(gong)出來，以便盡(jin)快為(wei)(wei)后續工(gong)(gong)序的(de)加工(gong)(gong)供給(gei)精基(ji)準。稱為(wei)(wei)“基(ji)準先行”。

2、區分(fen)加工(gong)階段 

加(jia)工(gong)質(zhi)量(liang)(liang)要求高的外表，都區分加(jia)工(gong)階段，一般可分為粗加(jia)工(gong)、半(ban)精(jing)加(jia)工(gong)和(he)精(jing)加(jia)工(gong)三個階段。首要是為了(le)確(que)保加(jia)工(gong)質(zhi)量(liang)(liang)；有(you)利于(yu)(yu)合理(li)運用(yong)設備；便于(yu)(yu)組織熱處理(li)工(gong)序；以(yi)及便于(yu)(yu)時(shi)發(fa)現毛(mao)坯缺陷等。 

3、先(xian)面后孔 

對于(yu)箱體、支架和連桿等(deng)零件應先(xian)加(jia)工(gong)平面后(hou)加(jia)工(gong)孔(kong)(kong)。這樣就可(ke)以以平面定位加(jia)工(gong)孔(kong)(kong)，確(que)保平面和孔(kong)(kong)的位置精度(du)，并(bing)且(qie)對平面上的孔(kong)(kong)的加(jia)工(gong)帶來方便。 

4、光整加工 

光(guang)整(zheng)(zheng)加(jia)(jia)(jia)(jia)工(gong)(gong)后(hou)的(de)工(gong)(gong)件(jian)，首(shou)要外表(biao)的(de)光(guang)整(zheng)(zheng)加(jia)(jia)(jia)(jia)工(gong)(gong)（如研磨(mo)、珩磨(mo)、精磨(mo)滾壓(ya)加(jia)(jia)(jia)(jia)工(gong)(gong)等），應放在(zai)工(gong)(gong)藝道路Z終階段(duan)進行，加(jia)(jia)(jia)(jia)工(gong)(gong)后(hou)的(de)外表(biao)光(guang)潔度在(zai)Ra0.8um以(yi)上，細微的(de)磕(ke)碰都(dou)會(hui)損壞(huai)外表(biao)，在(zai)日本(ben)、德國等國家，在(zai)光(guang)整(zheng)(zheng)加(jia)(jia)(jia)(jia)工(gong)(gong)后(hou)，都(dou)要用絨布進行維護，肯定禁絕用手或其它物件(jian)直接觸摸工(gong)(gong)件(jian)，以(yi)免光(guang)整(zheng)(zheng)加(jia)(jia)(jia)(jia)工(gong)(gong)的(de)外表(biao)，因為工(gong)(gong)序間的(de)轉運和裝置而(er)受到損害。