ABSTRACT

The usage area of natural fiber reinforced composite materials has been increasing day by day, due to their attaining to not only ecological benefits but also high mechanical properties with their low weight. After the fabrication of natural fiber reinforced composites, they need to be subjected to secondary processes such as milling, drilling and turning processes according to their field of use. In this study, it was aimed to determine milling performance of JFRP and FFRP composites, which are obtained from natural fibers. Experiments were carried out at the different processing parameters. The effects of these parameters on cutting force, vibration amplitude, delamination factor, and surface roughness were investigated. Vibration amplitude and delamination factor increased, and cutting force and surface roughness decreased with increasing spindle speed. Cutting force, vibration amplitude, delamination factor and surface roughness increased with increasing feed rate. The most appropriate values for cutting force, delamination factor and surface roughness were obtained in experiments where WC end mill was used. However, in vibration amplitude, the lowest values were HSS end mill. Delamination factors and surface roughness in FFRP composites were higher than those of JFRP composites. Cutting forces of FFRP composites were lower than those of JFRP composites.

摘要

天然纤维增强复合材料的使用面积日益增加，因为它们不仅具有生态效益，而且重量轻、力学性能高。天然纤维增强复合材料制成后，需要根据其使用领域进行铣削、钻孔和车削等二次加工。在本研究中，旨在确定从天然纤维中获得的 JFRP 和 FFRP 复合材料的铣削性能。在不同的处理参数下进行了实验。研究了这些参数对切削力、振动幅度、分层系数和表面粗糙度的影响。振动幅度和分层系数增加，切削力和表面粗糙度随着主轴转速的增加而降低。切削力、振幅、分层系数和表面粗糙度随着进给量的增加而增加。在使用 WC 立铣刀的实验中获得了切削力、分层系数和表面粗糙度的最合适值。然而，在振动幅度中，最低值是高速钢立铣刀。FFRP复合材料的分层因子和表面粗糙度均高于JFRP复合材料。FFRP 复合材料的切削力低于 JFRP 复合材料。在使用 WC 立铣刀的实验中获得了分层系数和表面粗糙度。然而，在振动幅度中，最低值是高速钢立铣刀。FFRP复合材料的分层因子和表面粗糙度均高于JFRP复合材料。FFRP 复合材料的切削力低于 JFRP 复合材料。在使用 WC 立铣刀的实验中获得了分层系数和表面粗糙度。然而，在振动幅度中，最低值是高速钢立铣刀。FFRP复合材料的分层因子和表面粗糙度均高于JFRP复合材料。FFRP 复合材料的切削力低于 JFRP 复合材料。