基于气熔比的氧化锆陶瓷薄板激光切割质量研究
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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.
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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[15]陈聪,高明,顾云泽,等.光纤激光切割铝合金薄板工艺特性研究[J].中国激光,2014,41(6):73-79.CHEN Cong,GAO Ming,GU Yunze,et al.Study on Fiber Laser Cutting of Aluminum Alloy Sheet[J].Chinese J.Lasers,2014,41(6):73-79.
[2]冯涛,王培,景文峰,等.氧化锆基片式NOx气体传感器的研制[J].传感器世界,2014,20(6):7-11.FENG Tao,WANG Pei,JING Wenfeng,et al.Development of Zirconia–based Potentiometric NOx Sensor[J].Sensor World,2014,20(6):7-11.
[3]闫胤洲,季凌飞,鲍勇,等.高硬脆陶瓷激光加工技术的研究及进展[J].激光杂志,2008,29(6):5-11.YAN Yinzhou,JI Lingfei,BAO Yong,et al.Researches and Developments of Laser Processing Ceramics Technique[J].Laser Journal,2008,29(6):5-11.
[4]AFFOLTER P,SCHMID H G.Processing of New Ceramic Materials with Solid State Laser Radiation[J].SPIE-High Power Lasers Ind.,1987,8:120-129.
[5]SCHULZ W,KOSTRYKIN V,NIEβEN M.Dynamics of Ripple Formation and Melt Flow in Laser Beam Cutting[J].Journal of Physics D:Applied Physics.,1999,32(11):1219-1228.
[6]CABANILLASE E D,CREUS M F,MERCADER R C.Microscopic Spheroidal Particles Obtained by Laser Cutting[J].J.Mater.Sci.,2005,40(2):519-522.
[7]WEE L M,CROUSE P L,LI L.A Statistical Analysis of Striation Formation during Laser Cutting of Ceramics[J].Int.J.Adv.Manuf.Technol.,2008,36(7):699-706.
[8]崔园园.激光加工陶瓷胚体的工艺研究[D].北京:清华大学,2010.CUI Yuanyuan.Study of Laser Machining Ceramic Green Body[D].Beijing:Tsinghua University,2010.
[9]田国中.工程陶瓷的激光热裂法切割技术研究[D].哈尔滨:哈尔滨工业大学,2011.TIAN Guozhong.Ceramic Theramal Stress Cleaving Technology Based on Laser[D].Harbin:Harbin Institute of Technology,2011.
[10]李国发,张栋林,龚金龙,等.ZrO2陶瓷激光加热辅助切削加工技术[J].吉林大学学报(工学版),2012,42(6):1409-1414.LI Guofa,ZHANG Donglin,GONG Jinlong,et al.Laser-assisted Machining Technique for Zirconia Ceramics[J].Journal of Jilin University(Engineering and Technology Edition),2012,42(6):1409-1414.
[11]孟庆轩,王续跃,徐文骥,等.薄板激光切割气熔比数学建模及试验验证[J].机械工程学报,2011,47(17):172-178.MENG Qingxuan,WANG Xuyue,XU Wenji,et al.Vaporization-melt Ratio Mathematical Model and Experiments of Laser Cutting Sheet Metal[J].Journal of Mechanical Engineering,2011,47(17):172-178.
[12]王续跃,孟庆轩,康仁科,等.气熔比法铝合金薄板激光切割试验研究[J].中国激光,2010,37(10):2648-2652.WANG Xuyue,MENG Qingxuan,KANG Renke,et al.Experiments of Laser Cutting of Aluminum Alloy Sheet Based on Vaporization-melt Ratio Controlled Method[J].Chinese J.Lasers,2010,37(10):2648-2652.
[13]SHARMA A,YADAVA V.Modelling and Optimization of Cut Quality during Pulsed Nd:YAG Laser Cutting of Thin Al-alloy Sheet for Straight Profile[J].Optics&Laser Technology,2013,51(1):77-88.
[14]马南钢,王希军,丁华东,等.碳化硼厚板的激光切割工艺及其机制[J].中国激光,2007,34(10):1441-1445.MA Nangang,WANG Xijun,DING Huadong,et al.Laser Cutting Processing and Mechanism for Thick Boron Plate[J].Optics&Laser Technology,2007,34(10):1441-1445.
[15]陈聪,高明,顾云泽,等.光纤激光切割铝合金薄板工艺特性研究[J].中国激光,2014,41(6):73-79.CHEN Cong,GAO Ming,GU Yunze,et al.Study on Fiber Laser Cutting of Aluminum Alloy Sheet[J].Chinese J.Lasers,2014,41(6):73-79.