【作者】 王艳红；

【导师】 孙惠学；

【作者基本信息】 燕山大学 ， 材料加工工程， 2008， 硕士

【摘要】 目前铝合金轮毂作为汽车的安全性要求最高的零部件,其制造技术也在不断发展。锻造铝轮毂的质量最好,但成本高,效率低。近年来,欧美车轮行业逐步用锻旋铝合金轮毂取代传统的车轮生产工艺。轮毂的强旋成形是在热锻工艺基础上发展起来的,锻造制坯后进行旋压成形,提高了制造精度和力学性能。与世界许多发达国家相比,我国在这一方面的研究相对滞后,轮毂强旋成形时的变形机理在理论上还不是很成熟,而且也找不到用来指导生产实践的具体理论。根据轮毂旋压成形工艺,依据实际情况对轮毂旋压成形的边界、接触、运动轨迹、摩擦等条件进行确定,应用ABAQUS软件对成形过程进行三维有限元数值模拟,得出了成形过程中变形区应力、应变的分布规律。并分析了在壁厚减薄率一定时,不同旋轮进给率下坯料金属的径向变形、应力、应变及旋压力的变化规律。最后结合实验结果,分析了铝轮毂在强旋成形过程中产生的各种缺陷及原因。将数值模拟结果与实验结果进行分析比较,为用数值模拟方法进一步深入研究铝合金轮毂强旋的成形机理和特点打下良好的基础,为类似复杂零件的精密成形提供了借鉴。更多还原

【Abstract】 Currently aluminum alloy wheel as the highest security requirements for spare parts in a vehicle, its manufacturing technology is also constantly developing. Forged aluminum wheel has the best quality, however, the high cost and low efficiency. In recent years, Europe and the United States gradually replace the traditional production process by spinning and forging aluminum alloy wheels in wheel industry. Spin-forming wheel is developed on the hot forging process, spinning forming before forging billet, and improves the manufacturing precision and mechanical properties.By contrast with many developed countries of the world, our studies have been lagged. Wheel spin-forming mechanism of the deformation in theory is not very mature, and can’t find the specific practice which can be used to guide the production practice.According to forging and spinning technology, taking boundary condition, contact ,trajectory and friction into account in according with realistic processing of experiment, ABAQUS software is applied to 3D numerical simulation of power spinning of aluminum alloy wheel process and stress and strain distributions on shaping is considered. Rule of radial direction distortion of metal, variety of stress, strain and spinning force with the certain ratio of thinning and different roller feeding rate were analysis. In the end, associate with result of experiment, all kinds of vices of aluminum wheels’deforming were analysis as well as how to be.Experimental results justifies numerical simulation, which sets up ground for further studying of mechanism and features of general power spinning of forging and spinning aluminum alloy wheels. It also provides experience for the precision forming of the similar complex parts and provides optimizing of process parameters with effective methods and reliable support.更多还原