基于气熔比的氧化锆陶瓷薄板激光切割质量研究

发布时间：2018-07-15 07:10

【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。
[Abstract]:The effect of gas melting ratio and plate thickness on the quality of laser cutting zirconia ceramic plate is studied by using a laser precision cutting method based on gas melting ratio control, that is, the effect of gas melting ratio on the quality of cutting joint, the shape of cut surface stripe and the roughness. Four groups of specimens with gas melting ratio of 0.099 ~ 0.160 ~ 0.184 and 0.202 were observed. It was found that increasing the gas melting ratio could obviously improve the cutting quality, increase the length and wavelength of the smooth zone of the cut stripe, and reduce the roughness of the section from 6.969 渭 m to 2.482 渭 m. At the same time, four groups of specimens with a thickness of 0.8mm ~ 1.0mm ~ 1.5mm ~ 3.0mm were observed. With the increase of the thickness of the plate, the gas melting ratio decreased, the cutting joint quality decreased, and the cutting surface roughness decreased from 5.946 渭 m to 2.287 渭 m. When the thickness of the plate is 0.8 mm and 1.0 mm, the tangent plane is a smooth periodic stripe, and when the thickness of the plate is 1.5mm, the tangent plane presents two regions, that is, the smooth region and the rough area, and when the thickness of the plate is increased to 3.0mm, the tangent plane presents three regions, namely, the smooth region, the rough area and the squamous laminated area. The comprehensive study of gas melting ratio and plate thickness can deepen the understanding of laser cutting mechanism and provide theoretical and experimental basis for improving the laser cutting quality of zirconia ceramic plate.
【作者单位】：大连理工大学机械工程学院;
【基金】：国家自然科学基金资助项目(50975041,51375073,51321004)
【分类号】：TQ174.6

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