摘要
采用一种基于气熔比控制的激光精密切割方法,研究了气熔比和板厚对激光切割氧化锆陶瓷板质量的影响,即气熔比对切缝质量、切面条纹形貌及粗糙度的影响。对气熔比分别为0.099、0.160、0.184和0.202的4组试件进行观测,发现提高气熔比可明显改善切缝质量,增大切面条纹光滑区长度和条纹波长,切面粗糙度由6.969μm降低到2.482μm。同时对板厚分别为0.8mm、1.0mm、1.5mm、3.0mm的4组试件进行观测,随着板厚的增加,气熔比减小,切缝质量降低,切面粗糙度由5.946μm降低到2.287μm。板厚为0.8mm、1.0mm时,切面为较光滑的周期性条纹;板厚为1.5mm时,切面呈现两个区域,即光滑区和粗糙区;当板厚增加到3.0mm时,切面呈现三个区域,即光滑区、粗糙区和鳞状层叠区。综合研究气熔比和板厚可以加深对激光切割机理的认识,为提高氧化锆陶瓷板的激光切割质量提供理论与实验依据。
A laser precision cutting method was used based on vapor-melt ratios controlled,the influences of vapor-melt ratio and thickness on the cutting quality were studied systematically,that is the effects on kerf quality,kerf surface striation formation and roughness.Through observing on samples of different vapor-melt ratios(0.099,0.160,0.184,0.202),which shows that high vapor-melt ratio may improve the kerf quality,enlarge the length of smooth zone of kerf surface and the striation wavelength,decrease the kerf surface roughness.Meanwhile the observations on samples of different thicknesses(0.8mm,1.0mm,1.5mm,3.0mm)show that with the increasing of thicknesses,the vapor-melt ratio reduced,the kerf quality and roughness also decrease,the surface striation also presents different morphologies.When the thicknesses are as 0.8mm and 1.0mm respectively,the surface presents smoothly periodic striation;When the thickness is as 1.5 mm,the surface presents two zones,which are smooth zone and rough zone;When the thickness as 3.0mm,the surface presents three zones,which are smooth zone,rough zone and scaled stack zone.The researches of vapor-melt ratios and thicknesses may lead a deeper comprehension on the mechanism of laser cutting,provide theoretical and experimental basis for improving the laser cutting quality of zirconia ceramic.
引文
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