多楔带轮旋压增厚成形阶段金属流动规律分析  

Analysis on metal flow and deformation mechanism during thickening process of poly-wedge pulley spinning

作　　者：夏琴香[1] 王甲子[1] 王映品[1] 林业海 马哲明 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]中山中炬精工机械有限公司,广东中山528400

出　　处：《锻压技术》2009年第6期101-106,共6页Forging & Stamping Technology

基　　金：广东省省部产学研合作项目(2006D90304021)

摘　　要：钣制旋压带轮以其重量轻、生产效率高、节能、节材及动平衡性好等优点,在众多领域逐步取代以铸、锻等传统方法加工的带轮,得到广泛应用。本文深入分析了多楔带轮旋压成形特点,将其变形过程划分为增厚及旋齿两个变形阶段;基于增厚成形过程的重要性,采用有限元分析软件MSC.Marc对该过程预成形、腰鼓成形及增厚成形3个工步进行了数值模拟。结果表明,预成形时最大径向拉应变出现在缩径区,该区易产生成形缺陷;腰鼓成形以胀形为主要变形方式;增厚成形时径向应变以正应变为主、轴向及切向应变以负应变为主,体现为径向压缩、侧壁增厚的成形效果。在数值模拟结果的基础上,进行了工艺试验验证,结果吻合良好,验证了数值模拟分析的有效性。With the advantages of light weight, high precision and economy and good dynamic characteristics, the pulleys manufactured by spinning instead of being manufactured by forging or casting are widely used in many fields. The forming characteristics during six-wedge poly-pulley spinning were analyzed. The spinning forming was divided into two processes： thickening and tooth forming. The FEA simulations of the thickening process during poly-pulley spinning, including performing, drumming and thickening, were carried out by MSC. Marc software due to the importance of this process in the whole spinning forming. It indicates that the maximum radial tensile strain exists at necking area of performing workpiece during performing, and forming defects also appear on this area easily. Bulging is the main deformation during drumming. Tensile strain is mainly in the radial direction and compressive strains are mainly in the axial and tangential directions during thickening, according to the forming effect of radial compression and thickening. On the basis of FEM simulation, the experiment was carried out to prove the results of FEM. The experimental results agree well with the results of simulation, which verifies the validity of simulation.

关 键 词：多楔带轮 旋压 增厚成形 应变分布 流动规律 

分 类 号：TG376[金属学及工艺—金属压力加工]