Abstract: Additive manufacturing (AM) can provide reliable data support for digital twin model with its all-digital processing mode.Digital twins help AM give full play to its advantages different from traditional manufacturing in the process of design,manufacturing,service and so on.The combination of the two has been widely concerned in the field of industrial manufacturing.To summarize the implementation method of digital twin in AM,the concept and development of digital twin were introduced,and the key technologies of digital twin in AM were analyzed.Based on the application potential of digital twins for the whole life cycle process of AM,the relevant research methods were expounded from four stages: design,manufacturing,quality inspection and service.In addition,the challenge of implementing digital twins in binder spraying process was prospected,and a digital twin technology route for it was proposed.Finally,the problems and future development directions of digital twins in AM were summarized.

Key words: digital twins, additive manufacture, Industry 4.0, artificial intelligence, binder jetting

摘要： 增材制造以其全数字化加工方式可为数字孪生模型提供可靠的数据支撑;数字孪生有助于增材制造在设计、制造、服务等过程中充分发挥其不同于传统制造的优势,二者的结合在工业制造领域受到广泛关注。以总结数字孪生在增材制造中的实施方法为目的,介绍了数字孪生的概念和发展历程,分析了增材制造中实施数字孪生的关键技术;基于数字孪生对于增材制造全生命周期过程的应用潜力,从设计、制造、质量检测以及服务4个阶段阐述了国内外相关研究的方法和侧重点。展望了粘结剂喷射工艺中实施数字孪生的挑战,并提出了针对其的一种数字孪生技术路线。最后总结了增材制造中实现数字孪生存在的难题以及未来的发展方向。

关键词: 数字孪生, 增材制造, 工业4.0, 人工智能, 粘结剂喷射