Tkac Jozef, Toth Teodor, Fedorko Gabriel, Molnar Vieroslav, Dovica Miroslav, Samborski Sylwester
Faculty of Manufacturing Technologies, Technical University of Kosice with a seat in Presov, Sturova 31, 08001 Presov, Slovakia.
Faculty of Mechanical Engineering, Technical University of Kosice, Letna 9, 04200 Kosice, Slovakia.
Polymers (Basel). 2023 Dec 22;16(1):48. doi: 10.3390/polym16010048.
Gyroid structures are among the most widely used three-dimensional elements produced by various additive manufacturing technologies. This paper focuses on a metrological analysis of Flexfill 92A material specimens with a relative density (25 to 85%) using industrial computer tomography. The results show that for a given structure, the best method is to use surface determination with the closure of internal defects in the material. The analysis implies that the smallest deviations of the specimens' external dimensions were achieved with respect to the CAD model at the highest relative densities. The wall thickness shows the smallest percentage change of 0.5685 at 45% relative density and the largest at 25% and 85% relative density. The nominal-actual comparison of manufactured specimens to the CAD model shows the smallest cumulative deviation of 0.209 mm at 90% and 25% relative density, while it slightly increases with increasing relative density. All produced specimens have a smaller material volume than their theoretical volume value, while the percentage change in volume is up to 8.6%. The surface of specimens is larger compared with the theoretical values and the percentage change reaches up to 25.3%. The percentage of pores in the specimens increases with increasing relative density and reaches 6%. The acquired knowledge will be applied in the framework of research focused on the possibilities of using additive manufacturing to produce a skeleton of rubber-textile conveyor belts. This paper presents initial research on the possibility of replacing the carcass of rubber-textile belts with an additive technology use.
类螺旋结构是各种增材制造技术生产的应用最为广泛的三维元素之一。本文聚焦于使用工业计算机断层扫描技术对相对密度为25%至85%的Flexfill 92A材料试样进行计量分析。结果表明，对于给定结构，最佳方法是采用表面测定并封闭材料内部缺陷。分析表明，在最高相对密度下，试样的外部尺寸相对于CAD模型的偏差最小。壁厚在相对密度为45%时显示出最小的百分比变化0.5685，在相对密度为25%和85%时变化最大。制造的试样与CAD模型的名义-实际比较显示，在相对密度为90%和25%时累积偏差最小，为0.209毫米，而随着相对密度增加略有增大。所有生产的试样的材料体积均小于其理论体积值，而体积百分比变化高达8.6%。试样表面比理论值大，百分比变化高达25.3%。试样中的孔隙百分比随相对密度增加而增加，最高可达6%。所获得的知识将应用于专注于使用增材制造生产橡胶-纺织输送带骨架可能性的研究框架中。本文介绍了关于用增材技术替代橡胶-纺织带胎体可能性的初步研究。
