激光熔覆成形中熔池表面温度场的检测与研究
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摘要
针对激光熔覆成形中熔池表面温度场难以测量的问题,搭建了彩色CCD同轴测温系统。通过优化实验参数,该测温平台可获得清晰、稳定的熔池表面图像,对所拍图像进行处理和计算,可以得到熔池表面的温度场。为了验证得到的温度场是否准确,搭建了红外测温系统,通过对熔池表面不同区域进行测温,得到了与CCD测量结果基本吻合的熔池表面温度分布。两种不同的测温方式得到一致的温度场,说明此测温平台是实用、可靠的,为通过实时检测熔池表面温度进而控制熔覆成形系统打下基础。
In order to solve the problem that temperature field on the surface of molten pool is difficult to measure in laser cladding forming,this paper builds a color CCD coaxial temperature measurement system.The platform can take a clear and stable image of the molten pool through optimizing the experimental parameters,from which we can get the temperature distribution on the surface of the molten pool.To verify whether the temperature distribution obtained is reasonable and accurate,an infrared thermometer temperature measurement system was set up.According to the measurement of different areas' temperature on the surface,the temperature distribution of molten pool is basically coincident with the CCD measurement results obtained.The consistent temperature distribution from the two different temperature measurement methods shows that the temperature measurement platform is practical and reliable,which lays the foundation of controlling the cladding system by detecting the surface temperature of the molten pool in real time.
In order to solve the problem that temperature field on the surface of molten pool is difficult to measure in laser cladding forming,this paper builds a color CCD coaxial temperature measurement system.The platform can take a clear and stable image of the molten pool through optimizing the experimental parameters,from which we can get the temperature distribution on the surface of the molten pool.To verify whether the temperature distribution obtained is reasonable and accurate,an infrared thermometer temperature measurement system was set up.According to the measurement of different areas' temperature on the surface,the temperature distribution of molten pool is basically coincident with the CCD measurement results obtained.The consistent temperature distribution from the two different temperature measurement methods shows that the temperature measurement platform is practical and reliable,which lays the foundation of controlling the cladding system by detecting the surface temperature of the molten pool in real time.
引文
[1]LEI Jianbo,YANG Xiachen,CHEN Juan,et al.Determination of temperature field distribution on laser cladding surface[J].Chinese Journal of Laser,2008,35(10):1605-1608.(in Chinese)雷剑波,杨洗陈,陈娟,等.激光熔覆池表面温度场分布的检测[J].中国激光,2008,35(10):1605-1608.
[2]LEI Jianbo.Study for molten pool temperature field of laser remanufacturing based on CCD[D].Tianjin:Tianjin University of Technology,2007.(in Chinese)雷剑波.基于CCD的激光再制造熔池温度场检测研究[D].天津:天津工业大学,2007.
[3]LEI Jianbo,YANG Xiachen,CHEN Juan,et al.Study on the temperature field of laser puddle[J].Huazhong University of Science and Technology,2007,35(1):112-114.(in Chinese)雷剑波,杨洗陈,陈娟,等.激光熔池温度场检测研究[J].华中科技大学学报,2007,35(1):112-114.
[4]HUANG Jie.Real-time detection and analysis of the temperature field of laser cladding rapid forming molten pool[D].Shanghai:Shanghai Jiao Tong University,2013.(in Chinese)黄洁.激光熔覆快速成形的熔池温度场的实时检测与分析[D].上海:上海交通大学,2013.
[5]D M Hu,R Kovacevic.Sensing,modeling and control for laser-based additive manufacturing[J].International Journal of Machine Tools&Manufacture,2003,(43):51-60.
[6]Pavlov M,Novichenko D,Doubenskaia M.Optical diagnostics of deposition of metal matrix composites by laser cladding[J].Physics Procedia,2011,12:674-682.
[7]PENG Xiaoqi,YAN Jun,SUN Yuan.Design and Implementation of High Temperature Field Detector Based on CCD Image Sensor[J].Journal of Sensor Technology,2010,23(3):355-356.(in Chinese)彭小奇,严军,孙元.基于CCD图像传感器的高温场检测仪设计与实现[J].传感技术学报,2010,23(3):355-356.
[8]SUN Yuan.Non-contact measurement of temperature field based on CCD image sensor[D].Changsha:Central South University,2007.(in Chinese)孙元.基于CCD图像传感器的高温温度场非接触式测量研究[D].长沙:中南大学,2007.
[9]CUI Yu,LI Hongfei.Principle and practical application guide of infrared thermometer[J].Automation And Instrumentation,2009,(6):103-107.(in Chinese)崔雨,李鸿飞.红外测温仪的原理及实际应用指南[J].自动化与仪器仪表,2009,(6):103-107.
[2]LEI Jianbo.Study for molten pool temperature field of laser remanufacturing based on CCD[D].Tianjin:Tianjin University of Technology,2007.(in Chinese)雷剑波.基于CCD的激光再制造熔池温度场检测研究[D].天津:天津工业大学,2007.
[3]LEI Jianbo,YANG Xiachen,CHEN Juan,et al.Study on the temperature field of laser puddle[J].Huazhong University of Science and Technology,2007,35(1):112-114.(in Chinese)雷剑波,杨洗陈,陈娟,等.激光熔池温度场检测研究[J].华中科技大学学报,2007,35(1):112-114.
[4]HUANG Jie.Real-time detection and analysis of the temperature field of laser cladding rapid forming molten pool[D].Shanghai:Shanghai Jiao Tong University,2013.(in Chinese)黄洁.激光熔覆快速成形的熔池温度场的实时检测与分析[D].上海:上海交通大学,2013.
[5]D M Hu,R Kovacevic.Sensing,modeling and control for laser-based additive manufacturing[J].International Journal of Machine Tools&Manufacture,2003,(43):51-60.
[6]Pavlov M,Novichenko D,Doubenskaia M.Optical diagnostics of deposition of metal matrix composites by laser cladding[J].Physics Procedia,2011,12:674-682.
[7]PENG Xiaoqi,YAN Jun,SUN Yuan.Design and Implementation of High Temperature Field Detector Based on CCD Image Sensor[J].Journal of Sensor Technology,2010,23(3):355-356.(in Chinese)彭小奇,严军,孙元.基于CCD图像传感器的高温场检测仪设计与实现[J].传感技术学报,2010,23(3):355-356.
[8]SUN Yuan.Non-contact measurement of temperature field based on CCD image sensor[D].Changsha:Central South University,2007.(in Chinese)孙元.基于CCD图像传感器的高温温度场非接触式测量研究[D].长沙:中南大学,2007.
[9]CUI Yu,LI Hongfei.Principle and practical application guide of infrared thermometer[J].Automation And Instrumentation,2009,(6):103-107.(in Chinese)崔雨,李鸿飞.红外测温仪的原理及实际应用指南[J].自动化与仪器仪表,2009,(6):103-107.