油割加工跟慢走絲加工概念是如何呢？

　　慢走絲(si)油割加(jia)工時金屬的(de)蝕除分熔化(hua)和氣化(hua)兩種。寬脈寬作用(yong)時間長(chang)，容易造成(cheng)(cheng)熔化(hua)加(jia)工，使工件表面形貌(mao)變差，變質層增厚，內應(ying)力加(jia)大，易產生裂紋。而脈寬小到一定(ding)值時，作用(yong)時間極(ji)短(duan)，形成(cheng)(cheng)氣化(hua)加(jia)工，可(ke)以(yi)減小變質層厚度(du)，改(gai)善(shan)表面質量，減小內應(ying)力，避免裂紋產生。　

　　慢(man)(man)走絲(si)油割(ge)加(jia)工(gong)(gong)切割(ge)在機(ji)械、汽配及標準件(jian)行業中(zhong)屬于一項廣泛而重要的(de)(de)，在鐵芯(xin)模具、轉子疊(die)鉚模具的(de)(de)加(jia)工(gong)(gong)過程中(zhong)，慢(man)(man)走絲(si)油割(ge)加(jia)工(gong)(gong)方(fang)面誤差極小，保持(chi)了模具的(de)(de)專配精度、提高壽(shou)命(ming)。在慢(man)(man)走絲(si)油割(ge)加(jia)工(gong)(gong)的(de)(de)過程中(zhong)不能有(you)誤差，稍微沒(mei)有(you)注(zhu)意到就會造成(cheng)工(gong)(gong)件(jian)報廢(fei)，同時又提高了成(cheng)本(ben)，加(jia)工(gong)(gong)時間加(jia)長(chang)等影響。

　　慢走(zou)絲(si)(si)是利用連續移動的(de)(de)細金屬(shu)(shu)絲(si)(si)（稱為電(dian)(dian)(dian)(dian)極(ji)絲(si)(si)）作電(dian)(dian)(dian)(dian)極(ji)，對工(gong)(gong)(gong)(gong)(gong)件(jian)進(jin)行脈沖(chong)火(huo)花放(fang)(fang)電(dian)(dian)(dian)(dian)蝕除金屬(shu)(shu)、切割成型的(de)(de)一(yi)(yi)種加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)機(ji)床。慢走(zou)絲(si)(si)加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)時在(zai)線電(dian)(dian)(dian)(dian)極(ji)與工(gong)(gong)(gong)(gong)(gong)件(jian)之(zhi)間(jian)(jian)(jian)存在(zai)的(de)(de)疏松(song)接觸(chu)式(shi)輕壓(ya)放(fang)(fang)電(dian)(dian)(dian)(dian)現(xian)象(xiang)。當(dang)柔性(xing)電(dian)(dian)(dian)(dian)極(ji)絲(si)(si)與工(gong)(gong)(gong)(gong)(gong)件(jian)接近(jin)到(dao)通常(chang)認為的(de)(de)放(fang)(fang)電(dian)(dian)(dian)(dian)間(jian)(jian)(jian)隙(例如8～10μm)時，并(bing)(bing)不發生火(huo)花放(fang)(fang)電(dian)(dian)(dian)(dian)，甚(shen)至當(dang)電(dian)(dian)(dian)(dian)極(ji)絲(si)(si)已接觸(chu)到(dao)工(gong)(gong)(gong)(gong)(gong)件(jian)，從顯(xian)微(wei)鏡(jing)中已看(kan)不到(dao)間(jian)(jian)(jian)隙時，也(ye)常(chang)常(chang)看(kan)不到(dao)火(huo)花，只(zhi)(zhi)有(you)當(dang)工(gong)(gong)(gong)(gong)(gong)件(jian)將電(dian)(dian)(dian)(dian)極(ji)絲(si)(si)頂彎(wan)并(bing)(bing)偏移一(yi)(yi)定(ding)距離(幾微(wei)米到(dao)幾十微(wei)米)時才(cai)發生正常(chang)的(de)(de)火(huo)花放(fang)(fang)電(dian)(dian)(dian)(dian)。此時線電(dian)(dian)(dian)(dian)極(ji)每進(jin)給1μm，放(fang)(fang)電(dian)(dian)(dian)(dian)間(jian)(jian)(jian)隙并(bing)(bing)不減少1μm，而是電(dian)(dian)(dian)(dian)極(ji)絲(si)(si)增加(jia)(jia)一(yi)(yi)點線間(jian)(jian)(jian)張力，工(gong)(gong)(gong)(gong)(gong)件(jian)則增加(jia)(jia)一(yi)(yi)點側向壓(ya)力，顯(xian)然，只(zhi)(zhi)有(you)電(dian)(dian)(dian)(dian)極(ji)絲(si)(si)和(he)工(gong)(gong)(gong)(gong)(gong)件(jian)之(zhi)間(jian)(jian)(jian)保(bao)持一(yi)(yi)定(ding)的(de)(de)輕微(wei)接觸(chu)壓(ya)力后才(cai)能形成火(huo)花放(fang)(fang)電(dian)(dian)(dian)(dian)。據此認為在(zai)電(dian)(dian)(dian)(dian)極(ji)絲(si)(si)和(he)工(gong)(gong)(gong)(gong)(gong)件(jian)之(zhi)間(jian)(jian)(jian)存在(zai)著(zhu)某種產(chan)生的(de)(de)絕緣薄膜(mo)介質。

　　西部慢走絲加工在(zai)工(gong)(gong)(gong)業(ye)上的(de)(de)(de)使(shi)用非常廣泛。慢走(zou)絲(si)(si)是(shi)(shi)利用連續(xu)移動(dong)的(de)(de)(de)細金(jin)屬絲(si)(si)（稱為電(dian)(dian)極絲(si)(si)，一般為銅絲(si)(si)和(he)鉬絲(si)(si)）作電(dian)(dian)極，對工(gong)(gong)(gong)件進行脈沖火花放電(dian)(dian)，產生6000度以上高溫(wen)，蝕除(chu)金(jin)屬、切割(ge)成(cheng)工(gong)(gong)(gong)件的(de)(de)(de)一種數控加工(gong)(gong)(gong)機床。慢走(zou)絲(si)(si)加工(gong)(gong)(gong)原理(li)是(shi)(shi)在(zai)線電(dian)(dian)極與工(gong)(gong)(gong)件之間(jian)存在(zai)的(de)(de)(de)有縫(feng)間(jian)隙(xi)，持續(xu)放電(dian)(dian)去除(chu)金(jin)屬的(de)(de)(de)現(xian)象。