Deep Learning Applied to Defect Detection in Powder Spreading Process of Magnetic Material Additive Manufacturing

Hsin Yu Chen, Ching Chih Lin, Ming Huwi Horng, Lien Kai Chang, Jian Han Hsu, Tsung Wei Chang, Jhih Chen Hung, Rong Mao Lee, Mi Ching Tsai

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)

摘要

Due to its advantages of high customization and rapid production, metal laser melting manufacturing (MAM) has been widely applied in the medical industry, manufacturing, aerospace and boutique industries in recent years. However, defects during the selective laser melting (SLM) manufacturing process can result from thermal stress or hardware failure during the selective laser melting (SLM) manufacturing process. To improve the product’s quality, the use of defect detection during manufacturing is necessary. This study uses the process images recorded by powder bed fusion equipment to develop a detection method, which is based on the convolutional neural network. This uses three powder-spreading defect types: powder uneven, powder uncovered and recoater scratches. This study uses a two-stage convolutional neural network (CNN) model to finish the detection and segmentation of defects. The first stage uses the EfficientNet B7 to classify the images with/without defects, and then to locate the defects by evaluating three different instance segmentation networks in second stage. Experimental results show that the accuracy and Dice measurement of Mask-R-CNN network with ResNet 152 backbone can reach 0.9272 and 0.9438. The computational time of an image only takes approximately 0.2197 sec. The used CNN model meets the requirements of the early detected defects, regarding the SLM manufacturing process.

原文English
文章編號5662
期刊Materials
15
發行號16
DOIs
出版狀態Published - 2022 8月

All Science Journal Classification (ASJC) codes

  • 一般材料科學
  • 凝聚態物理學

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