如何保證金(jin)屬激光焊接機輝(hui)光放電(dian)的穩定(ding)性

人們想要獲得金屬激光焊接機高光(guang)(guang)(guang)(guang)束(shu)質(zhi)量的激(ji)(ji)光(guang)(guang)(guang)(guang)輸(shu)出，必須(xu)先實現大體積、均勻(yun)(yun)而(er)穩(wen)定(ding)的輝光(guang)(guang)(guang)(guang)放電(dian)。而(er)在高功率CO2激(ji)(ji)光(guang)(guang)(guang)(guang)器中(zhong)，氣體放電(dian)中(zhong)的電(dian)流、電(dian)壓、氣體溫(wen)度都(dou)很高，輝光(guang)(guang)(guang)(guang)放電(dian)正(zheng)柱區(qu)熱不(bu)穩(wen)定(ding)性和(he)電(dian)弧收縮等(deng)現象較嚴重。因(yin)此，為(wei)了獲(huo)得金(jin)屬激(ji)(ji)光(guang)(guang)(guang)(guang)焊接機高光(guang)(guang)(guang)(guang)束(shu)質(zhi)量的激(ji)(ji)光(guang)(guang)(guang)(guang)輸(shu)出，必須(xu)要確保輝光(guang)(guang)(guang)(guang)放電(dian)的穩(wen)定(ding)性和(he)均勻(yun)(yun)性。

根(gen)據(ju)(ju)人們對金屬(shu)激(ji)(ji)光(guang)(guang)(guang)(guang)焊(han)接機(ji)CO2激(ji)(ji)光(guang)(guang)(guang)(guang)器(qi)的(de)(de)研(yan)究，常采用以下(xia)技術提(ti)高(gao)輝(hui)光(guang)(guang)(guang)(guang)放電(dian)(dian)(dian)的(de)(de)穩定(ding)性(xing)(xing)和均勻(yun)性(xing)(xing)。一(yi)是(shi)(shi)把大(da)體(ti)積的(de)(de)放電(dian)(dian)(dian)區分成(cheng)許多小的(de)(de)放電(dian)(dian)(dian)區分別加以控制(zhi)，在(zai)橫流(liu)CO2激(ji)(ji)光(guang)(guang)(guang)(guang)器(qi)中(zhong)，陰極或陽極通(tong)常被分成(cheng)多個電(dian)(dian)(dian)極，軸向(xiang)快流(liu)CO2激(ji)(ji)光(guang)(guang)(guang)(guang)器(qi)中(zhong)常用的(de)(de)放電(dian)(dian)(dian)區級聯方法(fa)有很多；二是(shi)(shi)氣體(ti)的(de)(de)快速流(liu)動使(shi)不(bu)穩定(ding)擾動因子(zi)及時帶出放電(dian)(dian)(dian)區；三是(shi)(shi)增加湍流(liu)以增加放電(dian)(dian)(dian)的(de)(de)均勻(yun)性(xing)(xing)；四是(shi)(shi)增加預(yu)電(dian)(dian)(dian)離(li)或外電(dian)(dian)(dian)離(li)源以增加放電(dian)(dian)(dian)均勻(yun)性(xing)(xing)。市場上不(bu)少金屬(shu)激(ji)(ji)光(guang)(guang)(guang)(guang)焊(han)接機(ji)的(de)(de)激(ji)(ji)光(guang)(guang)(guang)(guang)器(qi)都根(gen)據(ju)(ju)上述技術進行設計，其輝(hui)光(guang)(guang)(guang)(guang)放電(dian)(dian)(dian)較(jiao)為穩定(ding)和均勻(yun)。

根據上述(shu)技術設(she)計的金(jin)屬激(ji)光(guang)(guang)焊(han)接機激(ji)光(guang)(guang)器(qi)中(zhong)，針一(yi)板(ban)式(shi)和管一(yi)板(ban)式(shi)兩(liang)種激(ji)光(guang)(guang)器(qi)比(bi)較受歡迎。其中(zhong)管一(yi)板(ban)放(fang)電(dian)(dian)(dian)激(ji)光(guang)(guang)器(qi)由幾(ji)十個放(fang)電(dian)(dian)(dian)區(qu)組成，小放(fang)電(dian)(dian)(dian)區(qu)比(bi)多(duo)針一(yi)板(ban)放(fang)電(dian)(dian)(dian)激(ji)光(guang)(guang)器(qi)少(shao)一(yi)個數量(liang)級，因此放(fang)電(dian)(dian)(dian)的均(jun)勻(yun)性優于多(duo)針一(yi)板(ban)放(fang)電(dian)(dian)(dian)，同(tong)時管一(yi)板(ban)放(fang)電(dian)(dian)(dian)激(ji)光(guang)(guang)器(qi)的工藝和結構(gou)也(ye)相對簡(jian)單(dan)，將其運用到(dao)金(jin)屬激(ji)光(guang)(guang)焊(han)接機后(hou)，不僅可以提(ti)高其輝光(guang)(guang)放(fang)電(dian)(dian)(dian)的穩定性和均(jun)勻(yun)性，還可以簡(jian)化其結構(gou)設(she)計。