增材制造成形工艺及其关键技术研究

Research and analysis on the key technical problem of additive manufacturing process

在研究增材制造技术发展的基础上,对成形工艺过程中的关键技术问题以及裂纹、孔隙、球化等现象,采用理论计算、数值模拟和实验设计分析相结合的方法,进行了增材制造工艺过程分析与成形方法优化。结果发现:成形的材料、工艺、热量输入的瞬时性、局部性及其连续性等因素,制约产品成形的精度和质量,直接决定成形件的致密度和力学性能。通过研究与分析,提出了具体的解决思路与方法,同时也为该领域研究提供了理论基础和研究方法。

The theoretical calculation and numerical simulation are combined with experimental design and analysis to solve the phenomenon of crack porosity and spheroidization produced in additive manufacturing process based on the development of additive manufacturing technology. The analysis of additive manufacturing process were carried and optimized, and some factors, restricting the forming quality, were found, including the forming material, process, instantaneous heat input, locality and continuity. Therefore, the forming precision and quality of forming products are restricted, and directly determines the density and mechanical properties of the formed parts. Through research and analysis, the concrete solution ideas and methods are put forward. At the same time, it also provides scientific theoretical basis and research methods for the research in this field.