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首页> 外文期刊>Journal of Manufacturing Processes >Investigation on the effects of process parameters in CNC assisted pellet based fused layer modeling process
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Investigation on the effects of process parameters in CNC assisted pellet based fused layer modeling process

机译：基于CNC辅助丸粒熔合层建模过程中工艺参数影响的研究

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A new CNC assisted pellet-based fused layer modeling (FLM) process has been presented. It allows the fabrication of highly flexible parts which is not easily possible through the fused filament fabrication (FFF) process as buckling occurs when the flexible filament is fed into liquefier head. Instead of the filament, the presented FLM process utilizes the material in pellet form. The FLM process is different from the other extrusion based AM processes and has its own characteristics. Therefore, the current paper presents a parametric investigation in the developed FLM process by considering the ethylene vinyl acetate (EVA) material. Experiments have been conducted using the 'one factor at a time' (OFAT) approach. The effects of barrel temperature, bed temperature, screw speed, deposition speed, standoff distance between nozzle and bed surface have been studied on the melt flow rate, layer thickness and road width. The obtained results showed that the melt flow rate of EVA is increased with the increase in the screw speed and barrel temperature. A significant variation of approximately 27% was observed in the layer thickness with the change in the deposition speed and standoff distance. A decrease of 42.42% was observed in the road width when the standoff distance was reduced from 2 to 0.8 mm. Based on the investigation, a set of suitable process parameters was obtained to fabricate the flexible parts of the EVA material. The outcomes of the current study showed that the developed FLM process has the capabilities of fabricating parts utilizing a set of suitable process parameters.
机译：提出了一种新的基于CNC辅助颗粒的融合层建模（FLM）工艺。它允许制造高柔韧性的零件，而这是通过熔融长丝制造（FFF）工艺不容易实现的，因为当将柔韧性长丝送入液化头时会发生弯曲。代替长丝，提出的FLM工艺利用颗粒形式的材料。 FLM工艺不同于其他基于挤出的AM工艺，并且具有自己的特性。因此，本文通过考虑乙烯乙酸乙烯酯（EVA）材料，对已开发的FLM工艺进行了参数研究。已经使用“一次一个因素”（OFAT）方法进行了实验。研究了料筒温度，床温，螺杆速度，沉积速度，喷嘴与床表面之间的间隔距离对熔体流动速率，层厚和道路宽度的影响。所得结果表明，随着螺杆转速和料筒温度的升高，EVA的熔体流动速率增加。随着沉积速度和支座距离的变化，在层厚度中观察到大约27％的显着变化。当支座距离从2减少到0.8 mm时，路面宽度下降了42.42％。在调查的基础上，获得了一组合适的工艺参数来制造EVA材料的柔性部件。当前研究的结果表明，已开发的FLM工艺具有利用一组合适的工艺参数来制造零件的能力。

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