為了確保精細零件(jian)產品的質量(liang)，在精細零件(jian)加工中(zhong)需遵從以下4大原則(ze)：

精細(xi)零件加工(gong)需(xu)遵從4大原則

1、基準先行：即先加工基準面,零件在機械加工過程中，作為定位基準的表面應首先加工出來，以便盡快為后續工序的加工供給精基準。

2、劃(hua)(hua)分(fen)加(jia)(jia)(jia)工(gong)階段：機(ji)械加(jia)(jia)(jia)工(gong)質量請求高(gao)的表面，都劃(hua)(hua)分(fen)加(jia)(jia)(jia)工(gong)階段，一般可分(fen)為(wei)(wei)粗加(jia)(jia)(jia)工(gong)、半(ban)精加(jia)(jia)(jia)工(gong)和精加(jia)(jia)(jia)工(gong)三個階段。首(shou)要是為(wei)(wei)了確保加(jia)(jia)(jia)工(gong)質量;有(you)利于科學(xue)應用設備;便(bian)于組織熱處理工(gong)序；以(yi)及便(bian)于時發現毛坯缺陷等。

3、先(xian)面(mian)(mian)后(hou)孔(kong)：關于箱體、支架(jia)和連桿等零件(jian)應先(xian)加工平面(mian)(mian)后(hou)加工孔(kong)。這樣就可以以平面(mian)(mian)定(ding)位加工孔(kong)，確(que)保(bao)平面(mian)(mian)和孔(kong)的(de)方位精度(du)，并且(qie)對平面(mian)(mian)上的(de)孔(kong)的(de)加工帶來便(bian)利。

4、光整(zheng)加工(gong)(gong)(gong)：首(shou)要表面的(de)光整(zheng)加工(gong)(gong)(gong)，如研磨(mo)、珩磨(mo)、精磨(mo)、滾壓加工(gong)(gong)(gong)等(deng)，應放在(zai)工(gong)(gong)(gong)藝道(dao)(dao)路結尾階段(duan)。擬(ni)定(ding)精細零件(jian)加工(gong)(gong)(gong)工(gong)(gong)(gong)藝道(dao)(dao)路的(de)一(yi)般原則,精細零件(jian)加工(gong)(gong)(gong)工(gong)(gong)(gong)藝規(gui)程的(de)擬(ni)定(ding)，大體可(ke)分為(wei)兩(liang)個環節。首(shou)先是擬(ni)定(ding)零件(jian)加工(gong)(gong)(gong)的(de)工(gong)(gong)(gong)藝道(dao)(dao)路，然后(hou)再(zai)確(que)定(ding)每(mei)一(yi)道(dao)(dao)工(gong)(gong)(gong)序的(de)工(gong)(gong)(gong)序尺寸、所用設備(bei)和(he)工(gong)(gong)(gong)藝配備(bei)以及(ji)切削(xue)規(gui)范、工(gong)(gong)(gong)時定(ding)額等(deng)。

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