多材料多尺度3D打印主动混合喷头的研究

发布时间：2018-05-21 21:22

本文选题：多材料多尺度D打印 + 主动混合喷头　；参考：《中国科学:技术科学》2017年02期

【摘要】：多材料多尺度3D打印代表增材制造技术的前沿和未来发展方向,在功能驱动的"材料-结构-器件"的一体化制造,"创材"、"创物"和"创生"方面已经展示出巨大的潜能和广阔的应用前景.本文提出一种单喷头多材料多尺度3D打印新方法,针对核心功能部件——多材料主动混合喷头,开展了理论分析、数值模拟和实验验证的系统研究.提出一种多材料主动混合喷头,根据描述混合过程的物理方程(流体控制方程、湍流模型和稀物质扩散方程),阐述了叶轮直径、叶轮转速、流体黏度、体积力等因素对于混合效率和混合性能的影响及其规律;利用COMOSOL工程模拟软件,进一步揭示了叶轮直径、叶轮转速、流体黏度对于多材料混合的影响及其规律;最后,通过渐变色模型打印、变刚度模型打印和微尺度模型打印三个典型实验案例,验证了理论分析和数值模拟研究结果正确性和有效性.本研究为多材料多尺度3D打印奠定了理论基础,并为多材料多尺度3D打印装备的开发和工艺优化提供了重要理论支撑和方向性指导.
[Abstract]:Multi-material and multi-scale 3D printing represents the frontier and future development direction of material augmentation manufacturing technology. It has shown great potential and broad application prospect in the integrated manufacture of functionally driven "material-structure-device", "creative material", "innovation" and "creation". In this paper, a new method of multi-scale 3D printing with single nozzle, multi-material and multi-scale is proposed. The theoretical analysis, numerical simulation and experimental verification are carried out for the multi-material active mixing nozzle, which is the core functional component. A multi-material active mixing nozzle is proposed. According to the physical equations (fluid governing equation, turbulence model and dilute material diffusion equation) describing the mixing process, the impeller diameter, impeller speed and fluid viscosity are described. The influence of volume force and other factors on mixing efficiency and mixing performance, and the influence of impeller diameter, impeller speed and fluid viscosity on the mixing of multi-materials are further revealed by using COMOSOL engineering simulation software. Finally, The correctness and validity of the theoretical analysis and numerical simulation results are verified by three typical experimental cases: gradual color model printing, variable stiffness model printing and micro scale model printing. This study lays a theoretical foundation for multi-material and multi-scale 3D printing, and provides important theoretical support and directional guidance for the development of multi-material and multi-scale 3D printing equipment and process optimization.
【作者单位】：青岛理工大学青岛市3D打印工程研究中心;西安交通大学机械制造系统工程国家重点实验室;
【基金】：国家自然科学基金“纳米制造的基础研究”重大研究计划(批准号:91023023);国家自然科学基金(批准号:51375250) 青岛市创业创新领军人才计划(编号:13-CX-18)资助项目
【分类号】：TP391.73

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