- 共 1頁6條記錄
電(dian)(dian)(dian)火花(hua)線(xian)切割(ge)機(ji)（Wire cut Electrical Discharge Machining簡稱(cheng)WEDM），屬(shu)電(dian)(dian)(dian)加工范疇，是由前蘇聯(lian)拉扎林科夫婦研究開關(guan)觸(chu)點受火花(hua)放(fang)電(dian)(dian)(dian)腐蝕損壞(huai)的(de)(de)(de)現象(xiang)和(he)(he)原(yuan)因時(shi)，發(fa)(fa)(fa)現電(dian)(dian)(dian)火花(hua)的(de)(de)(de)瞬時(shi)高(gao)溫可以(yi)使局(ju)部(bu)的(de)(de)(de)金屬(shu)熔(rong)化(hua)(hua)、氧化(hua)(hua)而被腐蝕掉，從而開創(chuang)和(he)(he)發(fa)(fa)(fa)明(ming)了電(dian)(dian)(dian)火花(hua)加工方法。線(xian)切割(ge)機(ji)也于(yu)1960年(nian)發(fa)(fa)(fa)明(ming)于(yu)前蘇聯(lian)，我國是第一(yi)(yi)個用于(yu)工業生產的(de)(de)(de)國家。自由正(zheng)離子(zi)(zi)和(he)(he)電(dian)(dian)(dian)子(zi)(zi)在場中(zhong)積(ji)累，很(hen)快(kuai)形(xing)成(cheng)(cheng)(cheng)一(yi)(yi)個被電(dian)(dian)(dian)離的(de)(de)(de)導電(dian)(dian)(dian)通道。在這個階段，兩板間形(xing)成(cheng)(cheng)(cheng)電(dian)(dian)(dian)流。導致粒子(zi)(zi)間發(fa)(fa)(fa)生無數(shu)次(ci)碰撞，形(xing)成(cheng)(cheng)(cheng)一(yi)(yi)個等離子(zi)(zi)區，并很(hen)快(kuai)升高(gao)到8000到12000度(du)的(de)(de)(de)高(gao)溫，在兩導體(ti)表面瞬間熔(rong)化(hua)(hua)一(yi)(yi)些材(cai)(cai)料(liao)，同時(shi)，由于(yu)電(dian)(dian)(dian)極和(he)(he)電(dian)(dian)(dian)介(jie)液的(de)(de)(de)汽化(hua)(hua)，形(xing)成(cheng)(cheng)(cheng)一(yi)(yi)個氣(qi)泡，并且它的(de)(de)(de)壓力規(gui)則上升直到非常(chang)高(gao)。然(ran)后(hou)(hou)電(dian)(dian)(dian)流中(zhong)斷，溫度(du)突然(ran)降低，引起氣(qi)泡內向爆炸，產生的(de)(de)(de)動力把溶化(hua)(hua)的(de)(de)(de)物質(zhi)拋出彈坑，然(ran)后(hou)(hou)被腐蝕的(de)(de)(de)材(cai)(cai)料(liao)在電(dian)(dian)(dian)介(jie)液中(zhong)重新凝結成(cheng)(cheng)(cheng)小的(de)(de)(de)球體(ti)，并被電(dian)(dian)(dian)介(jie)液排走。然(ran)后(hou)(hou)通過(guo)NC控制(zhi)的(de)(de)(de)監(jian)測和(he)(he)管控，伺服機(ji)構執行，使這種(zhong)放(fang)電(dian)(dian)(dian)現象(xiang)均勻一(yi)(yi)致，從而達到加工物被加工，使之成(cheng)(cheng)(cheng)為合乎要求之尺寸(cun)大小及形(xing)狀精度(du)的(de)(de)(de)產品。