| 模具表面激光强化离焦量波动声信号特征HHT分析 |
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| 引用本文： | 刘立君,姜亚青,邸铁男,李继强,贾志欣,杨文浩.模具表面激光强化离焦量波动声信号特征HHT分析[J].焊接学报,2013(9):51-54. |
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| 作者姓名： | 刘立君 姜亚青 邸铁男 李继强 贾志欣 杨文浩 |
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| 作者单位： | 哈尔滨理工大学材料科学与工程学院, 哈尔滨 150080;浙江大学宁波理工学院, 宁波 315100,浙江大学宁波理工学院, 宁波 315100,哈尔滨理工大学材料科学与工程学院, 哈尔滨 150080,浙江大学宁波理工学院, 宁波 315100,浙江大学宁波理工学院, 宁波 315100,宁波东浩铸业有限公司, 宁波 315113 |
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| 基金项目： | 黑龙江省教育厅科学技术研究资助项目(12521111);哈尔滨市优秀学科带头人基金资助项目(2012RFXXG75);黑龙江省自然基金资助项目(E201240);宁波自然基金资助项目(2011A610148);浙江省自然基金资助项目(Y1110262);宁波市重大择优资助项目(2011B1007) |
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| 摘 要： | 在模具表面激光强化过程中,由于示教、装夹等误差,引起激光离焦量波动,会对模具表面强化质量有较大的影响,为此提出模具表面激光强化离焦量波动声信号特征HHT分析方法.针对模具表面激光强化声信号特点,对激光强化声信号的强度进行理论分析,提出激光强化声信号希尔伯特-黄变换(HHT)分析步骤.在上述理论分析基础上,对离焦量波动激光强化信号特征进行HHT分析,利用开发激光强化信号特征希尔伯特-黄变换分析软件系统,辅助激光强化模具表面,模具使用寿命提高20%以上.试验结果为激光强化声信号进一步研究和应用,提供一定研究借鉴方法.
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| 关 键 词： | 模具激光强化 离焦量 声信号 希尔伯特-黄变换 |
| 收稿时间： | 2012/7/9 0:00:00 |
HHT analysis of acoustic signal characteristics caused by defocusing amount fluctuation on laser strengthened mould surface |
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| LIU Lijun,JIANG Yaqing,DI Tienan,LI Jiqiang,JIA Zhixin and YANG Wenhao.HHT analysis of acoustic signal characteristics caused by defocusing amount fluctuation on laser strengthened mould surface[J].Transactions of The China Welding Institution,2013(9):51-54. |
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| Authors: | LIU Lijun JIANG Yaqing DI Tienan LI Jiqiang JIA Zhixin and YANG Wenhao |
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| Affiliation: | School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China;Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China,Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China,School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China,Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China,Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China and Ningbo Donghao Die-casting Co. , Ltd. , Ningbo 315113, China |
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| Abstract: | During laser strengthening mould surface,the fluctuation of defocusing amount was caused by clamping and teaching errors,which greatly influenced the quality of laser strengthened mould surface.Thus,Hilbert-Huang Transform (HHT) analysis of acoustic signal characteristics caused by the fluctuation of defocusing amount on laser strengthened mould surface was put forward.According to the acoustic signal characteristics of laser strengthened mould surface,the HHT analysis steps were proposed.The mould life was improved over 20% when the mould surface was strengthened by the HHT analysis system.The experimental results provide a method for further researching and using laser strengthening acoustic signal. |
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| Keywords: | mould laser strengthening off-focus value acoustic signal Hilbert-Huang Transform ( HHT) |
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