Real-time process control of powder bed fusion by monitoring dynamic temperature field

• 作者: Chun-Bao Huo Di-Chen Li Qi Zhong Shun-Wen He Xiao-Kang Huang Xiao-Yong Tian Yi Cao Zhi-Qiang Tong
• 来源期刊: 先进制造进展（英文版）
• 年，卷（期）: 2020,（3）
• 页码范围: 380-391
• 页数: 12页
• 语种: 英文

摘要

This study aims to optimize the uniformity of the temperature field during sintering to improve part performance.A temperature-field monitoring system is established based on an infrared thermal imager and the temperature field data obtained during the sintering of a part can be measured in real time.The relationship among the sintering temperature field,sintering process parameters,and part performance is established experimentally.Subsequently,a temperature field monitoring and analysis system is constructed,and various sintering temperaturefield control strategies are established for various part sizes.Finally,a dynamic control strategy for controlling the temperature field during sintering is proposed,experimentally validated,and fully integrated into a developed powder bed fusion (PBF) equipment.For eight-shaped standard parts,the range of sintering temperature field is optimized from 44.1 ℃ to 19.7 ℃,whereas the tensile strength of the parts increased by 15.4％.For large-size H parts,localized over burning is eliminated and the final quality of the part is optimized.This strategy is critical for the optimization of the PBF process for large-sized parts,in particular in the large-sized die manufacturing industry,which offers promise in the optimization of part performance.