Ciobanu Robert, Arhip George, Donțu Octavian, Rizescu Ciprian Ion, Grămescu Bogdan
Department of Mechatronics and Precision Mechanics, Faculty of Mechanical Engineering and Mechatronics, National University of Science and Technology POLITEHNICA Bucharest, 060042 Bucharest, Romania.
Polymers (Basel). 2025 Jun 29;17(13):1810. doi: 10.3390/polym17131810.
This paper presents an analysis of the abrasive wear influence on the tooth flank geometry of plastic gear wheels, emphasizing the contribution of tooth stiffness to the observed changes. The study examined gear wheels made from polylactic acid (PLA) with wall thicknesses of 0.6 mm, 1.0 mm and 2.4 mm, manufactured using FDM technology. A standard layer height of 0.2 mm was chosen as it offers a balance between good precision and reasonable printing times. The PLA gear wheels were tested for wear in a meshing configuration with a metallic reference gear. The results indicate that wear intensity increases as tooth stiffness decreases, suggesting an inverse proportionality between abrasive wear and tooth stiffness. In all tested cases, the tooth tip was more affected by abrasive wear compared to the rest of the profile. The analysis establishes that sliding velocity has the greatest influence on the abrasive wear characteristics of the evaluated gears. Based on experimental findings, a mathematical model was developed for simulating abrasive wear in plastic gears, with scalability across various manufacturing technologies. For PLA gears, both experimental and simulated data confirm that full tooth infill is essential for functional durability.
本文分析了磨料磨损对塑料齿轮齿面几何形状的影响，强调了齿刚度对观察到的变化的作用。该研究考察了采用熔融沉积成型（FDM）技术制造的壁厚分别为0.6毫米、1.0毫米和2.4毫米的聚乳酸（PLA）齿轮。选择0.2毫米的标准层高，因为它在良好的精度和合理的打印时间之间取得了平衡。对PLA齿轮与金属参考齿轮在啮合状态下进行了磨损测试。结果表明，磨损强度随着齿刚度的降低而增加，这表明磨料磨损与齿刚度成反比。在所有测试案例中，与齿廓的其他部分相比，齿尖受磨料磨损的影响更大。分析确定，滑动速度对所评估齿轮的磨料磨损特性影响最大。基于实验结果，开发了一个用于模拟塑料齿轮磨料磨损的数学模型，该模型可扩展应用于各种制造技术。对于PLA齿轮，实验数据和模拟数据均证实，全齿填充对功能耐久性至关重要。
