Profile monitoring based quality control method for fused deposition modeling process
Profile monitoring based quality control method for fused deposition modeling process
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DOI：
10.1007/s10845-018-1424-9
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发表时间：
2019-02-01
影响因子：
8.3
通讯作者：
Hong, Yili
中科院分区：
文献类型：
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作者：
He, Ketai;Zhang, Qian;Hong, Yili
为了监测打印零件的质量，研究了熔融沉积成型过程中打印零件几何质量的监测方法。采用基于机器视觉技术的非接触式测量方法，获得精确完整的几何信息。建立图像采集系统来采集建筑物各层的图像，并利用图像处理技术获取几何轮廓信息。根据上述信息，应用统计过程控制方法来监控打印过程中零件的几何质量。首先，应用边界签名方法将复杂的几何形状转化为简单的距离-角度函数以获得轮廓偏差数据。其次，研究并应用了基于剖面监测方法的剖面偏差数据监测，以达到分层监测的目的。研究中采用分位数-分位数图方法将轮廓偏差点云数据监测问题转化为线性轮廓关系监测问题，并建立EWMA控制图来监测线性关系的参数，以检测熔融沉积建模过程中发生的偏移。最后，进行实验室实验以证明所提出方法的有效性。
In order to monitor the quality of parts in printing, the methodology to monitor the geometric quality of the printed parts in fused deposition modeling process is researched. A non-contact measurement method based on machine vision technology is adopted to obtain the precise complete geometric information. An image acquisition system is established to capture the image of each layer of the part in building and image processing technology is used to obtain the geometric profile information. With the above information, statistical process control method is applied to monitor the geometric quality of the parts during the printing process. Firstly, a border signature method is applied to transform complex geometry into a simple distance-angle function to get the profile deviation data. Secondly, monitoring of the profile deviation data based on profile monitoring method is studied and applied to achieve the goal of layer-to-layer monitoring. In the research, quantile-quantile plot method is used to transform the profile deviation point cloud data monitoring problem into a linear profile relationship monitoring problem and EWMA control charts are established to monitor the parameters of the linear relationship to detect shifts occurred in the Fused Deposition Modeling process. Finally, laboratory experiments are conducted to demonstrate the effectiveness of the proposed approach.