基于图像反馈的涂覆成形形貌控制方法研究  

Research on Morphology Control of Coating Forming Based on Image Feedback

作　　者：任传奇 魏正英[1] 王鑫[1] 杜军[1] 

机构地区：[1]西安交通大学机械制造系统工程国家重点实验室,陕西西安710049

出　　处：《机械设计与制造》2018年第2期100-103,共4页Machinery Design & Manufacture

基　　金：国家重点研发计划专项-高性能大型金属结构件激光同步送粉增材制造工艺与装备(2016YFB1100400)

摘　　要：成形层形貌的稳定性是影响最终样件外形质量的关键问题之一,研究成形过程与成形形貌的控制方法对实现金属熔融涂覆高效、稳定成形具有重要意义。为提高金属熔融涂覆增材制造成形单层单道成形质量和精度,提出一种基于图像反馈的形貌控制方法。通过CCD对成形过程进行实时图像采集,提取成形过程形貌特征,分析熔融涂覆成形单层单道宽度特征历程,研究不同帧间特征宽度相对差异ΔW与运动速度协同关系。基于Delphi&Halcon软件平台,开发了金属熔融涂覆增材制造可视化主动控制系统,将成形过程中监测数据与工艺参数设定结合,开展实验对系统响应速度、精度进行实验验证。研究结果表明此系统对成形样件形貌有显著改善,极大提高了单道宽度平滑性,宽度一致性平均提高幅度达55.16%。In view of the stability of the shape of the forming layer is one of the key problems that affect the fined quality of the sample morphology, taking a study on the forming process and the control method of morphology makes a significant difference to metal fused-coating in achieving the efficient and stable forming. In order to improve the quality and precision of the samples of single layer single pass which are produced by the process of metal fused-coating additive manufacturing, a control method of morphology based on image-feedback wets established by this paper. The real-time acquisition of image was realized by CCD and the characteristics of morphology of the forming process were simultaneously extracted. Making analysis of the characteristics of the width during the course ,the relationship between the relative difference of different frames and moving speed was given. Under the software platform of Delphi ＆ Halcon, the active visualization control system of meted fused-coating additive manufacturing was developed which can make a combination of monitoring data and process parameter in the process of forming. Numerous experiments were carried out to the response speed and high precision. The results show that the system can improve the morphology of the sample and the smoothness of the width of the single layer single pass, and increase the uniformity of width by 55.16%.

关 键 词：3D打印 可视化 金属熔融涂覆 图像反馈 

分 类 号：TH16[机械工程—机械制造及自动化]