慢走絲工作原理：

　　慢(man)(man)走(zou)絲(si)(si)(si)(si)(si)是利用(yong)連續移(yi)動的細金屬(shu)絲(si)(si)(si)(si)(si)（稱為(wei)(wei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)絲(si)(si)(si)(si)(si)）作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)，對工(gong)(gong)件(jian)進(jin)行(xing)脈沖火花(hua)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)蝕除金屬(shu)、切割(ge)成(cheng)型(xing)的一(yi)(yi)種加工(gong)(gong)機床。慢(man)(man)走(zou)絲(si)(si)(si)(si)(si)加工(gong)(gong)時(shi)在線電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)與工(gong)(gong)件(jian)之間(jian)(jian)(jian)(jian)存在的疏松接(jie)觸(chu)式輕壓(ya)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)現象(xiang)。當(dang)柔性(xing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)絲(si)(si)(si)(si)(si)與工(gong)(gong)件(jian)接(jie)近到通常(chang)認為(wei)(wei)的放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)間(jian)(jian)(jian)(jian)隙(xi)(例如8～10μm)時(shi)，并不(bu)發(fa)生火花(hua)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，甚至當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)絲(si)(si)(si)(si)(si)已(yi)接(jie)觸(chu)到工(gong)(gong)件(jian)，從(cong)顯(xian)微鏡中已(yi)看不(bu)到間(jian)(jian)(jian)(jian)隙(xi)時(shi)，也(ye)常(chang)常(chang)看不(bu)到火花(hua)，只(zhi)有當(dang)工(gong)(gong)件(jian)將電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)絲(si)(si)(si)(si)(si)頂(ding)彎并偏移(yi)一(yi)(yi)定(ding)距離(幾(ji)微米(mi)到幾(ji)十微米(mi))時(shi)才發(fa)生正常(chang)的火花(hua)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。此時(shi)線電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)每進(jin)給1μm，放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)間(jian)(jian)(jian)(jian)隙(xi)并不(bu)減少1μm，而是電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)絲(si)(si)(si)(si)(si)增加一(yi)(yi)點(dian)線間(jian)(jian)(jian)(jian)張力(li)，工(gong)(gong)件(jian)則增加一(yi)(yi)點(dian)側向壓(ya)力(li)，顯(xian)然(ran)，只(zhi)有電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)絲(si)(si)(si)(si)(si)和工(gong)(gong)件(jian)之間(jian)(jian)(jian)(jian)保持(chi)一(yi)(yi)定(ding)的輕微接(jie)觸(chu)壓(ya)力(li)后才能(neng)形成(cheng)火花(hua)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。據此認為(wei)(wei)在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)絲(si)(si)(si)(si)(si)和工(gong)(gong)件(jian)之間(jian)(jian)(jian)(jian)存在著某種電(dian)(dian)(dian)(dian)(dian)(dian)(dian)化學(xue)產(chan)生的絕緣薄膜介(jie)質。

慢走絲加工效率：

　　（1）高加工效(xiao)率

　　由于ns級大峰值電(dian)流脈沖電(dian)源技(ji)術(shu)及檢(jian)測、控制、抗干擾技(ji)術(shu)的發展，低速(su)走絲電(dian)火花線切割機(ji)的加(jia)工效率也在不斷提高。

　　（2）較大厚度工(gong)件的加工(gong)效(xiao)率

　　在切割300 mm厚(hou)的工件時(shi)，加(jia)工效率可達170 mm2/min。這是很有(you)實(shi)際(ji)意義(yi)的技術提(ti)升。

　　（3）厚度(du)變化工件(jian)的(de)加工效率

　　自(zi)動檢測加(jia)工(gong)(gong)件的厚(hou)度，自(zi)動調整(zheng)加(jia)工(gong)(gong)參(can)數(shu)，防止斷絲，達到該狀態的高加(jia)工(gong)(gong)效率。

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