Ciecieląg Krzysztof, Zaleski Kazimierz
Department of Production Engineering, Faculty of Mechanical Engineering, Lublin University of Technology, 36 Nadbystrzycka, 20-618 Lublin, Poland.
Materials (Basel). 2022 Aug 28;15(17):5949. doi: 10.3390/ma15175949.
The machining of thin-walled elements used in the aviation industry causes may problems, which create a need for studying ways in which undesirable phenomena can be prevented. This paper presents the results of a study investigating face milling thin-walled elements made of titanium alloy, aluminum alloy and polymer composite. These materials were milled with folding double-edge cutters with diamond inserts. The results of maximum vertical forces and surface roughness obtained after machining elements of different thicknesses and unsupported element lengths are presented. The results of deformation of milled elements are also presented. The results are then analyzed by ANOVA. It is shown that the maximum vertical forces decrease (in range 42-60%) while the ratio of vertical force amplitude to its average value increases (in range 55-65%) with decreasing element thickness and increasing unsupported element length. It is also demonstrated that surface roughness deteriorates (in range 100% for aluminum, 30% titanium alloy, 15% for CFRP) with small element thicknesses and long unsupported element lengths. Long unsupported element lengths also negatively (increasing deformation several times) affect the accuracy of machined elements.
航空工业中使用的薄壁零件加工会引发诸多问题，这就需要研究如何防止不良现象的发生。本文介绍了一项关于铣削由钛合金、铝合金和聚合物复合材料制成的薄壁零件的研究结果。这些材料是用带有金刚石刀片的可转位双刃铣刀进行铣削的。文中给出了加工不同厚度和无支撑零件长度的零件后所获得的最大垂直力和表面粗糙度的结果。还给出了铣削零件的变形结果。然后通过方差分析对结果进行分析。结果表明，随着零件厚度减小和无支撑零件长度增加，最大垂直力减小（幅度在42% - 60%之间），而垂直力幅值与其平均值的比值增大（幅度在55% - 65%之间）。还表明，对于小零件厚度和长无支撑零件长度，表面粗糙度会恶化（铝合金恶化幅度达100%，钛合金为30%，碳纤维增强塑料为15%）。长无支撑零件长度也会对加工零件的精度产生负面影响（使变形增大数倍）。
