楔横轧多楔轧制大型空心车轴的偏转角算法  

Theoretical Modeling for Deflection Angle of Multi-Wedges-Synchrostep Cross-Wedge-Rolling for Hollow Axle

作　　者：黄海波[1,2] 张挺[1] 束学道[1,2] 

机构地区：[1]宁波大学机械工程与力学学院,宁波315211 [2]浙江省零件轧制成形技术研究重点实验室,宁波315211

出　　处：《系统仿真学报》2014年第4期774-779,共6页Journal of System Simulation

基　　金：浙江省杰出青年科学基金(R1110646);浙江省自然科学基金项目(LY12E05006);宁波市自然科学基金(2012A610079);宁波大学学科建设项目资助(XKL11061)

摘　　要：轨道车辆用空心车轴是以空心、轴向距离超长为特点的大型轴类件。确定各楔偏转角是实现使用楔横轧多楔同步轧制大型空心车轴工艺的关键。建立了楔横轧多楔同步轧制空心车轴的偏转角数学模型,给出了多楔同步轧制空心轴各楔偏转角的一般计算公式,提出了名义展宽角和实际展宽角的概念,建立了两者之间的关系。以轧制火车RD2空心车轴长轴段为例进行了有限元模拟验证,轧件质量较好。结果表明,外楔的实际展宽量比理论展宽量小,空心件偏转角并不能利用实心件偏转角计算公式进行简单体积代换得到。为选取多楔同步轧制成形空心车轴各楔的偏转角提供了一种方法,并可以作为多楔模具设计的参考依据。Hollow axles for railway vehicles are characterized with long length and central cavity in axial direction. The deflection angles of the wedges are the key factors for the hollow axle production with Multi-Wedges-Synchrostep cross-wedge-rolling（MWSCWR）. Mathematical models were built for deflection angles of two-wedge and three-wedge, which could be generally used for MWSCWR. Actual and theoretical stretching angles were defined and the comparison between them was investigated. The models were verified by forming RD2 hollow axle using finite element commercial code Deform-3D. The work piece forming quality is good. The results show that the actual stretching angle is smaller than the theoretical one. The deflection angles for hollow axle can not be obtained using the formulation of that for solid axle by volume subtraction. The developed models can be applied for hollow axle production by MWSCWR.

关 键 词：空心车轴 多楔同步轧制 偏转角 实际展宽角 端面移动量 

分 类 号：TG335.19[金属学及工艺—金属压力加工]