Thermal process simulation of droplet based metal printing with aluminium
Thermal process simulation of droplet based metal printing with aluminium
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DOI：
10.1007/s11740-018-0819-y
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发表时间：
2018-03
期刊：
影响因子：
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通讯作者：
B. Himmel;Dominik Rumschöttel;W. Volk
中科院分区：
文献类型：
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作者：
B. Himmel;Dominik Rumschöttel;W. Volk
基于液滴的增材制造是通过在构建平台上逐滴添加材料来构建全致密金属部件的新工艺的分支。由于每个液滴在接触时单独固化，因此与现有材料的结合质量由相邻表面温度和到达液滴的温度决定。为了设计一个确保所有液滴之间良好粘合的制造工艺，有必要了解工艺参数、零件几何形状和每个到达液滴的热条件之间的关系。本文提出了一种基于Flow 3D软件的热仿真模型。通过将用户例程添加到求解器，可以以可接受的努力模拟由数千个液滴组成的部件的构建过程。该模拟用于研究生产参数（基板温度、液滴温度和沉积频率）以及零件几何形状（层尺寸和高度）对所得温度场的影响。该模型已成功地通过实验数据进行了验证，并可以在此增材制造工艺的进一步开发过程中提供有价值的信息。
Droplet based additive manufacturing is a branch of novel processes to build full dense metal parts by adding material droplet by droplet on a build platform. As each droplet solidifies individually upon contact, the quality of bonding to the existing material is determined by the adjacent surface temperatures and the temperature of the arriving droplet. To design a manufacturing process that ensures good bonds between all droplets, it is necessary to understand the relations between process parameters, the part’s geometry and thermal conditions for each arriving droplet. This paper presents a thermal simulation model that is based on Flow 3D software. By adding a user routine to the solver, it is possible to simulate the building process of a part consisting of several thousand droplets with an acceptable effort. This simulation is used to study the effect of production parameters (substrate temperature, droplet temperature and deposition frequency) as well as the parts geometry (layer size and height) on the resultant temperature field. The model was successfully validated with experimental data and can deliver valuable information during further development of this additive manufacturing process.