机器人速度超差对激光熔覆层宏观形貌的影响
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摘要
在同轴送粉的激光熔覆工艺中,研究了激光功率和扫描速度对宏观形貌的影响规律。发现随着扫描速度的增大,熔覆道初始段出现高度不均现象。使用加速度传感器对激光熔覆轨迹的振动进行测试,提取加速度信号,再通过数值积分获得振动速度。对速度图像进行分析,发现机器人的初始速度大于设定速度,速度超差导致熔覆层的高度不均。针对此现象提出解决方法,在速度匀速区进行熔覆,并实际验证了本方法的有效性。
In the laser cladding process of coaxial powder feeding,the influence of laser power and scanning speed on the macroscopic morphology was studied.It was found that with the increase of the scanning speed,the height uneven occurred at the initial section of the cladding layer.An acceleration sensor was used to test the vibration of the laser cladding track.The acceleration signal was extraced,and the vibration speed was obtained by numerical integration.The speed images were analyzed,and it was found that the initial speed of the robot was greater than the set speed,and the speed difference exceeded the height uneven of cladding layer.A solution to this problem was proposed,cladding was performed at a uniform speed zone,and the effectiveness of the method was actually verified.
In the laser cladding process of coaxial powder feeding,the influence of laser power and scanning speed on the macroscopic morphology was studied.It was found that with the increase of the scanning speed,the height uneven occurred at the initial section of the cladding layer.An acceleration sensor was used to test the vibration of the laser cladding track.The acceleration signal was extraced,and the vibration speed was obtained by numerical integration.The speed images were analyzed,and it was found that the initial speed of the robot was greater than the set speed,and the speed difference exceeded the height uneven of cladding layer.A solution to this problem was proposed,cladding was performed at a uniform speed zone,and the effectiveness of the method was actually verified.
引文
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[2]JAGDHEESH R,MUDALI U K,SASTIKUMAR D,et al.Laser cladding of Si on austenitic stainless steel[J].Surface Engineering,2013,21(2):113-118.
[3]ZHAO X,CHEN J,LIN X,et al.Study on microstructure and mechanical properties of laser rapid forming Inconel 718[J].Materials Science and Engineering A,2008,478(1):119-124.
[4]罗煌,胡俊.激光近净成形工艺参数对熔覆层高度均匀性的影响分析[J].应用激光,2015,35(2):160-165.
[5]TAN H,ZHANG F Y,WEN R J.Experiment study of powder flow feed behavior of laser solid forming[J].Optics and Laser Engineering,2012,50(3):391-398.
[6]杨宁,杨帆.激光熔覆工艺参数对熔覆层质量的影响[J].热处理技术与装备,2010,31(4):17-19.
[7]TOYSERKANI E,KHAJEPOUR A,CORBIN S.3-D finite element modeling of laser cladding by powder deposition:effects of laser pulse shaping on the process[J].Optics&Lasers in Engineering,2004,41(6):849-867.
[8]OLIVEIRA U,OCELK V,HOSSON J T M D.Analysis of coaxial laser cladding processing conditions[J].Surface&Coatings Technology,2005,197(2):127-136.
[9]邢彬,常保华,都东.工艺参数对IC10高温合金激光熔覆层形貌的影响[J].焊接学报,2015,36(7):88-92.
[10]张若宾,张瑞乾,陈勇,等.激光熔覆铁基合金单道成形工艺参数的研究[J].热加工工艺,2017,46(22):162-165.
[11]陈川川.工艺参数对激光熔覆层影响的研究[D].长沙:湖南大学,2013.
[12]朱刚贤,张安峰,李涤尘.激光熔覆工艺参数对熔覆层表面平整度的影响[J].中国激光,2010,37(1):296-301.
[13]陈海龙,汪伟,栾军英.振动信号数值积分分析及积分误差分离方法研究[J].机械科学与技术,2014,33(9):1319-1323.
[14]李东文,熊晓燕,李博.振动加速度信号处理探讨[J].机电工程技术,2008,37(9):50-52.
[15]俞亮亮.激光光内送粉单道熔覆工艺及喷嘴优化研究[D].苏州:苏州大学,2014.