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Study and optimisation of FDM process parameters for support-material-free deposition of filaments and increased layer adherence

机译:FDM工艺参数的研究和优化,用于无支撑材料的长丝沉积和增加的层附着力

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摘要

As a consequence of the growth in additive manufacturing applications, research on the improvement of these processes has gained relevance. One such process, the Fused Deposition Modelling (FDM)-process, deposits a support-material to build negative surface features such as snap-fits. The purpose of this work is to determine the parameters that enable the fabrication of these types of features without a support material. We applied a design-of-experiments method to identify the quality of the non-supported deposition and the adherence between layers. As to control factors, we defined the deposition temperature and the extrusion and deposition velocities, while the nozzle diameter and the deposition height were held constant. For response factors, we defined the distance, the non-supported deposition quality, and the ultimate tensile stress. Additionally, an optimisation study was performed to maximise the mechanical strength and the non-supported distance, thereby making it possible to determine the suitable range of parameters for implementation of the process.
机译:由于增材制造应用的增长,对改善这些过程的研究已具有重要意义。一种这样的过程,即熔融沉积建模(FDM)过程,沉积了一种支撑材料来构建负表面特征,例如卡扣配合。这项工作的目的是确定可以在没有支撑材料的情况下制造这些类型特征的参数。我们应用了实验设计方法来确定非支撑沉积的质量以及层之间的附着力。关于控制因素,我们定义了沉积温度以及挤出和沉积速度,同时喷嘴直径和沉积高度保持恒定。对于响应因素,我们定义了距离,不受支撑的沉积质量和极限拉伸应力。此外,还进行了优化研究,以使机械强度和非支撑距离最大化,从而可以确定合适的参数范围以实施该过程。

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