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  眾所(suo)周知(zhi)數控切割機等離子電源的穩定性直接影響著切割質量，等離子電弧如果不穩定，就會導致切口參差不齊等缺陷，也會導致控制系統的相關元件壽命降低，噴嘴、電極頻繁更換。等離子電源不起弧的原因主要有輸入交流電壓過低、氣壓的高低、火花發生器不能自動斷弧、地線與工件接觸不良、割炬噴嘴和電極燒損等多種原因。龍門式數控切割機廠家華宇誠數控的技術人員經過一番研究分析，根據多年經驗總結出來了等離子切割機不起弧的6大典型原因及解決的方法：

    1、輸(shu)入交(jiao)流(liu)電(dian)(dian)(dian)壓過低。等(deng)(deng)離(li)子切(qie)(qie)割機(ji)的(de)(de)使(shi)用現場有(you)(you)(you)大型用電(dian)(dian)(dian)設施，切(qie)(qie)割機(ji)內(nei)部主回路(lu)元件(jian)故障等(deng)(deng)，會使(shi)輸(shu)入交(jiao)流(liu)電(dian)(dian)(dian)壓過低。解決方(fang)法：檢(jian)查等(deng)(deng)離(li)子切(qie)(qie)割機(ji)所接入電(dian)(dian)(dian)網是否有(you)(you)(you)足夠的(de)(de)承載能力，電(dian)(dian)(dian)源線規格(ge)是否符合(he)要求。等(deng)(deng)離(li)子切(qie)(qie)割機(ji)安(an)裝地點，應遠離(li)大型用電(dian)(dian)(dian)設備和(he)經常有(you)(you)(you)電(dian)(dian)(dian)氣干擾的(de)(de)地方(fang)。使(shi)用過程中，要定期清理切(qie)(qie)割機(ji)內(nei)灰塵和(he)元件(jian)上(shang)的(de)(de)污垢，檢(jian)查電(dian)(dian)(dian)線是否有(you)(you)(you)老化現象等(deng)(deng)。

    2、氣(qi)壓(ya)(ya)(ya)(ya)(ya)過(guo)高。解(jie)決方法：檢查空(kong)壓(ya)(ya)(ya)(ya)(ya)機壓(ya)(ya)(ya)(ya)(ya)力(li)是否調(diao)整合(he)適，空(kong)壓(ya)(ya)(ya)(ya)(ya)機和空(kong)氣(qi)過(guo)濾減壓(ya)(ya)(ya)(ya)(ya)閥(fa)的壓(ya)(ya)(ya)(ya)(ya)力(li)是否失調(diao)。開(kai)機后，如旋轉空(kong)氣(qi)過(guo)濾減壓(ya)(ya)(ya)(ya)(ya)閥(fa)調(diao)節開(kai)關，表壓(ya)(ya)(ya)(ya)(ya)無變化，說(shuo)明空(kong)氣(qi)過(guo)濾減壓(ya)(ya)(ya)(ya)(ya)閥(fa)失靈，需更換。氣(qi)壓(ya)(ya)(ya)(ya)(ya)過(guo)低：等(deng)離(li)子切(qie)割(ge)機工作時(shi)(shi)，如工作氣(qi)壓(ya)(ya)(ya)(ya)(ya)遠遠低于(yu)(yu)說(shuo)明書所要(yao)求(qiu)的氣(qi)壓(ya)(ya)(ya)(ya)(ya)，這意味著(zhu)等(deng)離(li)子弧的噴出速(su)度減弱(ruo)，輸入(ru)空(kong)氣(qi)流(liu)量(liang)小(xiao)于(yu)(yu)規定值，此(ci)時(shi)(shi)不能(neng)形成高能(neng)量(liang)、高速(su)度的等(deng)離(li)子弧，從(cong)而造(zao)成切(qie)口質(zhi)量(liang)差、切(qie)不透(tou)、切(qie)口積瘤的現(xian)象。

    3、火(huo)花發(fa)(fa)生器不能自動斷弧(hu)。解決方法(fa)：應經常檢查火(huo)花發(fa)(fa)生器放(fang)電(dian)極(ji)，使其表面(mian)保持平整(zheng)，適時調(diao)整(zheng)火(huo)花發(fa)(fa)生器的(de)放(fang)電(dian)電(dian)極(ji)間隙（0.8～1.2mm），必要時更換控制(zhi)板。

    4、地(di)線(xian)(xian)(xian)與(yu)工(gong)(gong)(gong)(gong)件(jian)接(jie)觸不良。接(jie)地(di)是(shi)切割前一項必不可少的準備(bei)工(gong)(gong)(gong)(gong)作。未使用(yong)專(zhuan)用(yong)的接(jie)地(di)工(gong)(gong)(gong)(gong)具(ju)(ju)，工(gong)(gong)(gong)(gong)件(jian)表面(mian)有絕(jue)緣物(wu)及長期使用(yong)老化(hua)嚴重的地(di)線(xian)(xian)(xian)等，都(dou)會使地(di)線(xian)(xian)(xian)與(yu)工(gong)(gong)(gong)(gong)件(jian)接(jie)觸不良。解決(jue)方(fang)法(fa)：應使用(yong)專(zhuan)門的接(jie)地(di)工(gong)(gong)(gong)(gong)具(ju)(ju)，并檢(jian)查是(shi)否有絕(jue)緣物(wu)影響地(di)線(xian)(xian)(xian)與(yu)工(gong)(gong)(gong)(gong)件(jian)表面(mian)接(jie)觸，避免使用(yong)老化(hua)的接(jie)地(di)線(xian)(xian)(xian)。

    5、割(ge)炬噴(pen)嘴(zui)和電(dian)極燒損(sun)。解(jie)決方法：按照(zhao)切(qie)割(ge)工件(jian)(jian)的技術要(yao)求(qiu)，正確(que)調(diao)整設備各(ge)擋位，檢查割(ge)炬噴(pen)嘴(zui)是(shi)否安(an)裝牢圄，需通冷卻水的噴(pen)嘴(zui)應提前使冷卻水循(xun)環起來(lai)。切(qie)割(ge)時(shi)，根據(ju)工件(jian)(jian)的厚度調(diao)整割(ge)炬與工件(jian)(jian)之間的距離。

    武漢華宇誠數控(kong)提醒(xing)大(da)家，等離子數控切割機不(bu)起弧(hu)除了上(shang)述(shu)原因意外，切割(ge)(ge)速度(du)(du)過慢，切割(ge)(ge)時割(ge)(ge)炬與工件的(de)(de)垂直度(du)(du)，以及操作者(zhe)對等離子(zi)切割(ge)(ge)機的(de)(de)熟悉(xi)程(cheng)度(du)(du)，操作水平等，都影響等離子(zi)弧(hu)的(de)(de)穩定性，使(shi)用(yong)者(zhe)應在這些(xie)方面(mian)注意。