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激光(guang)切割加工的熱量產生熔融(rong)層
在熔(rong)(rong)(rong)融(rong)(rong)(rong)切割(ge)中,激光束(shu)與惰(duo)性氣體同軸組合。激光切割(ge)加(jia)工(gong)的熱量產(chan)生熔(rong)(rong)(rong)融(rong)(rong)(rong)層(ceng),該(gai)熔(rong)(rong)(rong)融(rong)(rong)(rong)層(ceng)被來自噴嘴的壓縮(suo)氣體向下通過(guo)切縫(feng)噴出。熔(rong)(rong)(rong)融(rong)(rong)(rong)切割(ge)可用于(yu)切割(ge)厚(hou)度不超過(guo)25毫米的低碳鋼。
火(huo)焰(yan)切(qie)割,也稱為反應切(qie)割,利用激光束與氧氣(qi)(qi)(qi)或空氣(qi)(qi)(qi)耦合(he),將(jiang)基(ji)材加(jia)熱(re)到(dao)其(qi)著火(huo)溫度。當激光切(qie)割加(jia)工(gong)束產(chan)生的(de)(de)熱(re)量熔化表(biao)面(mian)時,氣(qi)(qi)(qi)體與基(ji)材發生放熱(re)反應,并產(chan)生額外的(de)(de)熱(re)源(yuan),從(cong)而形成氧化層或爐渣。當氣(qi)(qi)(qi)體射流從(cong)基(ji)底(di)的(de)(de)底(di)面(mian)噴射出(chu)爐渣時,它會產(chan)生切(qie)縫。火(huo)焰(yan)切(qie)割通常用于以(yi)相對較(jiao)快的(de)(de)加(jia)工(gong)速度切(qie)割合(he)金鋼,厚度可達40 mm。
升華或蒸發切割通常通過將層加熱到蒸發點來進行。這種切割方法通常用于汽化溫度低的材料,例如聚合物,木材和有機材料。
光(guang)(guang)(guang)纖(xian)激光(guang)(guang)(guang)器(qi)具(ju)有動態的(de)(de)工作(zuo)功(gong)(gong)率(lv)范圍,即使(shi)改變(bian)激光(guang)(guang)(guang)功(gong)(gong)率(lv),也可以使(shi)光(guang)(guang)(guang)束焦點及其位(wei)置保持恒定。另外,通過改變(bian)光(guang)(guang)(guang)學結構(gou)可以實現(xian)大(da)范圍的(de)(de)光(guang)(guang)(guang)斑尺(chi)寸。這(zhe)些(xie)功(gong)(gong)能(neng)使(shi)Z終用(yong)戶可以選(xuan)擇(ze)合適(shi)的(de)(de)功(gong)(gong)率(lv)密度,以切(qie)(qie)割(ge)(ge)各種(zhong)材料(liao)和(he)壁厚(hou)。光(guang)(guang)(guang)纖(xian)激光(guang)(guang)(guang)器(qi)是許(xu)多激光(guang)(guang)(guang)切(qie)(qie)割(ge)(ge)應用(yong)的(de)(de)理想解(jie)決方案(an)。
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