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　　針對鋁加工件剛度較弱(ruo)的厚壁壓鑄件工(gong)件，能夠 選用下列的夾裝方(fang)式(shi)，以(yi)降低變形(xing)：

　　①針對厚(hou)壁(bi)軸套類零件(jian)(jian)(jian)，假如用(yong)三爪自放心液(ye)壓卡盤或(huo)彈性夾(jia)頭從(cong)軸向夾(jia)持，加(jia)工(gong)(gong)后一旦松掉，工(gong)(gong)件(jian)(jian)(jian)必定(ding)產(chan)生變形(xing)。這時(shi)，鋁加(jia)工(gong)(gong)件(jian)(jian)(jian)應當(dang)運(yun)用(yong)剛度(du)(du)不錯的徑向內孔卡緊(jin)的方式。以零件(jian)(jian)(jian)內螺(luo)(luo)(luo)紋(wen)精準定(ding)位，自做一個帶外螺(luo)(luo)(luo)紋(wen)的穿軸頸，套進零件(jian)(jian)(jian)的內螺(luo)(luo)(luo)紋(wen)，其上用(yong)一個后蓋板(ban)卡緊(jin)內孔再用(yong)螺(luo)(luo)(luo)絲(si)帽背(bei)緊(jin)。加(jia)工(gong)(gong)外圓時(shi)就可防(fang)止夾(jia)持變形(xing)，進而獲得令人滿意(yi)的加(jia)工(gong)(gong)精密(mi)度(du)(du)。

　　②對(dui)厚壁金屬(shu)薄板工件開展加工時(shi)，建議是采用真空吸盤，以(yi)得到遍布(bu)勻稱(cheng)的(de)夾(jia)持(chi)力，再用較小的(de)切削使用量來加工，能夠 非常好地避免工件變形。

　　此(ci)外，還能(neng)夠應用封堵法(fa)。為提升厚壁工(gong)件的加工(gong)工(gong)藝剛度，可在工(gong)件內(nei)(nei)部(bu)添充(chong)物質，以降低夾裝(zhuang)和切削全過(guo)程中工(gong)件達變(bian)形。比如，向工(gong)件內(nei)(nei)灌進含(han)百分之三到六(liu)硝(xiao)酸鉀的尿(niao)素(su)溶液(ye)熔化物，加工(gong)之后，將工(gong)件滲入水或乙醇中，就(jiu)可以將該(gai)填充(chong)料(liao)融解倒出。

　　髙速切(qie)削(xue)(xue)時(shi)(shi)(shi)，因(yin)為加(jia)(jia)工(gong)(gong)(gong)容量大(da)及(ji)其時(shi)(shi)(shi)斷時(shi)(shi)(shi)續(xu)切(qie)削(xue)(xue)，因(yin)而切(qie)削(xue)(xue)全過(guo)程(cheng)通(tong)常(chang)造成震動，危(wei)害鋁加(jia)(jia)工(gong)(gong)(gong)件(jian)精密度和(he)粗糙度。因(yin)此，數控(kong)機(ji)床髙速切(qie)削(xue)(xue)加(jia)(jia)工(gong)(gong)(gong)加(jia)(jia)工(gong)(gong)(gong)工(gong)(gong)(gong)藝(yi)全過(guo)程(cheng)一般(ban)可分(fen)成：粗加(jia)(jia)工(gong)(gong)(gong)-半精加(jia)(jia)工(gong)(gong)(gong)-面銑加(jia)(jia)工(gong)(gong)(gong)-精加(jia)(jia)工(gong)(gong)(gong)等(deng)工(gong)(gong)(gong)藝(yi)流程(cheng)。

　　針對精(jing)(jing)(jing)密(mi)度規定高的(de)零件(jian)(jian)，有(you)(you)時(shi)候須開(kai)展二次半精(jing)(jing)(jing)加(jia)(jia)(jia)工(gong)(gong)(gong)，隨后(hou)再開(kai)展精(jing)(jing)(jing)加(jia)(jia)(jia)工(gong)(gong)(gong)。粗(cu)加(jia)(jia)(jia)工(gong)(gong)(gong)以(yi)后(hou)，零件(jian)(jian)能夠(gou) 當然(ran)制冷，清除粗(cu)加(jia)(jia)(jia)工(gong)(gong)(gong)造成的(de)熱應力，減少(shao)變(bian)(bian)形(xing)。粗(cu)加(jia)(jia)(jia)工(gong)(gong)(gong)以(yi)后(hou)留有(you)(you)的(de)容量(liang)應超過(guo)變(bian)(bian)形(xing)量(liang)，一般(ban)為(wei)1～3mm。精(jing)(jing)(jing)加(jia)(jia)(jia)工(gong)(gong)(gong)時(shi)，零件(jian)(jian)精(jing)(jing)(jing)加(jia)(jia)(jia)工(gong)(gong)(gong)表(biao)層要(yao)維持(chi)勻稱的(de)加(jia)(jia)(jia)工(gong)(gong)(gong)容量(liang)，一般(ban)以(yi)0.2～0.5毫米為(wei)宜(yi)，使數鋁加(jia)(jia)(jia)工(gong)(gong)(gong)件(jian)(jian)控刀(dao)片在(zai)加(jia)(jia)(jia)工(gong)(gong)(gong)全過(guo)程中(zhong)處在(zai)穩定的(de)情況(kuang)，能夠(gou) 大大減少(shao)切削變(bian)(bian)形(xing)，得到優良的(de)表(biao)層加(jia)(jia)(jia)工(gong)(gong)(gong)品質，確(que)保商品的(de)精(jing)(jing)(jing)密(mi)度。