CNC精密加工是一種傳統的，以去除法把多余材料削掉的加工方式。cnc加工速度快、成本低，加工(gong)材料具(ju)有高(gao)強度、耐高(gao)溫(wen)、高(gao)韌(ren)性、透明等要求；而且CNC模(mo)型處理形(xing)式不拘一格，如打磨、噴灰、噴漆、拋光、絲印、UV、電鍍等（特別是需要電鍍的模(mo)型），其效果完(wan)全(quan)可(ke)以同模(mo)具(ju)生產出來的產品媲美(mei)，甚至更(geng)高(gao)；在外觀、裝配(pei)、功能驗證都(dou)可(ke)以達到客戶最終設計意圖；因此，CNC模(mo)型制作已作為(wei)現(xian)代手板加工(gong)主流之一。

 CNC手板(ban)(ban)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)方法： 一 般是對(dui)工(gong)(gong)(gong)件(jian)(jian)進行(xing)上(shang)(shang)下兩面(mian)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)，特殊情況下會對(dui)工(gong)(gong)(gong)件(jian)(jian)進行(xing)三面(mian)、四面(mian)、五面(mian)或六(liu)面(mian)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)。在(zai)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)過程中，我們會對(dui)工(gong)(gong)(gong)件(jian)(jian)保(bao)留圍邊筐粘膠水，用(yong)邊筐拉骨對(dui)工(gong)(gong)(gong)件(jian)(jian)固定， 倒石膏對(dui)工(gong)(gong)(gong)件(jian)(jian)進行(xing)定位，加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)時工(gong)(gong)(gong)件(jian)(jian)和(he)CNC工(gong)(gong)(gong)作(zuo)臺面(mian)不(bu)會有粘合(he)作(zuo)用(yong)，更好的(de)(de)(de)保(bao)證加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)出來的(de)(de)(de)工(gong)(gong)(gong)件(jian)(jian)不(bu)會變形和(he)工(gong)(gong)(gong)件(jian)(jian)的(de)(de)(de)料位準確。另外，石膏是手板(ban)(ban)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)中不(bu)可缺(que)少 的(de)(de)(de)輔助材料。在(zai)進行(xing)翻面(mian)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)時型腔面(mian)已被(bei)掏空，而產(chan)品(pin)壁厚一般較薄，因此加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)會出現薄壁抖動現象，對(dui)產(chan)品(pin)的(de)(de)(de)外觀影響(xiang)很大。填(tian)上(shang)(shang)石膏后相當(dang)于加(jia)(jia)(jia)(jia)上(shang)(shang)了(le)支撐物(wu)， 這就使加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)時不(bu)會出現薄壁抖動，保(bao)證了(le)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)效果。

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