基于图像处理的喷涂雾锥角影响因素分析
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摘要
研究喷涂工艺参数与雾锥角的关系可为建立准确喷枪模型提供重要依据,但传统的直接测量喷幅尺寸的实验方法很难获取足够的实验数据。为了解决这个问题,该文提出并实现了一种雾锥角测定方法,通过截取雾锥图像的特定边界计算雾锥角。基于该方法,对控型空气压力、雾化空气压力和涂料流量与雾锥角的关系进行了系统的实验研究,通过分析发现如下规律:扇形空气压力与长轴雾锥角正相关,与扇形空气压力负相关;雾化空气压力与长短轴雾锥角、喷涂流量均正相关,且与扇形空气压力之间存在耦合关系;喷涂流量对雾锥角影响相对较小。
The relationship between the spray process parameters and the atomizer spray cone angle must be well understood for establishing accurate spray gun models. However,traditional experimental methods cannot easily provide sufficient experimental data,such as measurements of the spray pattern size.This paper presents a method to measure the atomizer cone angle by using image processing to identify the edges on an atomizer cone image.This method was then used in an experimental study of the relationship between the shaping air pressure,the atomizing air pressure and the flow rate on the atomizer cone angle.The results show that the shaping air pressure is positively correlated with the angle of the long axis of the atomizer cone and negatively correlated with the angle of the short axis of the atomizer cone.The atomizing air pressure is positively correlated with the angles of the long and short axes of the atomizer cone and the fluid flow rate.The atomizing air pressure is also coupled with the shaping air pressure.The fluid flow rate has a relatively small effect on the atomizer cone angle.
The relationship between the spray process parameters and the atomizer spray cone angle must be well understood for establishing accurate spray gun models. However,traditional experimental methods cannot easily provide sufficient experimental data,such as measurements of the spray pattern size.This paper presents a method to measure the atomizer cone angle by using image processing to identify the edges on an atomizer cone image.This method was then used in an experimental study of the relationship between the shaping air pressure,the atomizing air pressure and the flow rate on the atomizer cone angle.The results show that the shaping air pressure is positively correlated with the angle of the long axis of the atomizer cone and negatively correlated with the angle of the short axis of the atomizer cone.The atomizing air pressure is positively correlated with the angles of the long and short axes of the atomizer cone and the fluid flow rate.The atomizing air pressure is also coupled with the shaping air pressure.The fluid flow rate has a relatively small effect on the atomizer cone angle.
引文
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[10]杨丹,赵海滨,龙哲.MATLAB图像处理实例详解[M].北京:清华大学出版社,2013.YANG D,ZHAO H B,LONG Z.The detailed cases of MATLAB image processing[M]. Beijing:Tsinghua University Press,2013.(in Chinese)
[11]俞锦涛,陶宗明.等温条件下可压缩理想气体的伯努利方程[J].物理与工程,2016,26(2):72-74.YU J T,TAO Z M.The bernoulli’s equation of compressible ideal gas under the isothermal condition[J].Physics and Engineering,2016,26(2):72-74.(in Chinese)
[12]YE Q Y, PULLI K. Numerical and experimental investigation on the spray coating process using apneumatic atomizer:Influences of operating conditions and target geometries[J].Coatings,2017,7(1):13.
[13]邢立峰.伺服阀喷嘴小孔流量特性测量系统的研制[D].哈尔滨:哈尔滨工业大学,2007.XING L F.Research on servo value nozzle eyelet flow character measurement system[D]. Harbin:Harbin Institute of Technology,2007.(in Chinese)
[2]缪东晶,王国磊,吴聊,等.自由曲面均匀喷涂的机器人轨迹规划方法[J].清华大学学报(自然科学版),2013,53(10):1418-1423.MIAO D J,WANG G L,WU L,et al.Trajectory planning for freefrom surface uniform spraying[J].Journal of Tsinghua University(Science and Technology), 2013,53(10):1418-1423.(in Chinese)
[3] CHEN H P,XI N,SHENG W H,et al.Optimal spray gun trajectory planning with variational distribution for forming process[C]//Proceedings of the 2004IEEE International Conference on Robotics and Automation.New Orleans,LA,USA:IEEE,2004.
[4] ARIKAN M A S, BALKAN T. Process modeling,simulation,and paint thickness measurement for robotic spray painting[J].Journal of Robotic Systems,2000,17(9):479-494.
[5] BALKAN T,ARIKAN M A S.Modeling of paint flow rate flux for circular paint sprays by using experimental paint thicknessdistribution[J]. MechanicsResearch Communications,1999,26(5):609-617.
[6] CONNER D C,GREENFIELD A,ATKAR P N,et al.Paint deposition modeling for trajectory planning on automotive surfaces[J].IEEE Transactions on Automation Science and Engineering,2005,2(4):381-392.
[7]张永贵,黄玉美,高峰,等.喷漆机器人空气喷枪的新模型[J].机械工程学报,2006,42(11):226-233.ZHANG Y G,HUANG Y M,GAO F,et al.New model for air spray gun of robotic spray-painting[J].Chinese Journal of Mechanical Engineering, 2006, 42(11):226-233.(in Chinese)
[8]王国磊,伊强,缪东晶,等.面向机器人喷涂的多变量涂层厚度分布模型[J].清华大学学报(自然科学版),2017,57(3):324-330.WANG G L,YI Q,MIAO D J,et al.Multivariable coating thickness distribution model for robotic spray painting[J].Journal of Tsinghua University(Science and Technology),2017,57(3):324-330.(in Chinese)
[9] LEE I,KIM D,KOO J.Liquid jet breakup structure and transfer efficiency of a two-stage air-blast injector[J].Atomization and Sprays,2012,22(7):561-579.
[10]杨丹,赵海滨,龙哲.MATLAB图像处理实例详解[M].北京:清华大学出版社,2013.YANG D,ZHAO H B,LONG Z.The detailed cases of MATLAB image processing[M]. Beijing:Tsinghua University Press,2013.(in Chinese)
[11]俞锦涛,陶宗明.等温条件下可压缩理想气体的伯努利方程[J].物理与工程,2016,26(2):72-74.YU J T,TAO Z M.The bernoulli’s equation of compressible ideal gas under the isothermal condition[J].Physics and Engineering,2016,26(2):72-74.(in Chinese)
[12]YE Q Y, PULLI K. Numerical and experimental investigation on the spray coating process using apneumatic atomizer:Influences of operating conditions and target geometries[J].Coatings,2017,7(1):13.
[13]邢立峰.伺服阀喷嘴小孔流量特性测量系统的研制[D].哈尔滨:哈尔滨工业大学,2007.XING L F.Research on servo value nozzle eyelet flow character measurement system[D]. Harbin:Harbin Institute of Technology,2007.(in Chinese)