摘要
针对薄壁管材矫直时发生管材外侧拉裂,内侧起皱及截面扁化等现象,造成废品率较高的实际问题,为提高薄壁管材矫直质量,从弹塑性弯曲理论出发,求解出一种等曲率二辊矫直机辊型曲线,运用MATLAB、CAD软件设计出凹辊、凸辊辊型曲线。基于有限元ANSYS/LS-DYNA平台,结合具体实例建立薄壁管矫直三维有限元模型,对其矫直过程进行动态仿真研究,分析各个阶段薄壁管材在辊缝中受力变化情况,得到其对应的等效应力、应变云图,并对矫直质量做出评定,验证了所设计辊型的合理性,为实际生产提供理论指导。
For the phenomenon of the thin-walled tube fracture,flattening of cross-section and medial wrinkling in the straightening process, in order to improve the straightening quality of the thin-walled tube ,according to the theory of elastic- plastic bending, the single curvature roller shape curve of two roller straightener was designed.The figures of the concave roller and the convex roller were designed by using MATLAB and CAD software.The 3D finite element model was established according to the specific example and the dynamic straightening process was simulated based on the finite element ANSYS/ LS-DYNA platform.The changes of the thin-walled tube＇s stress were analyzed in the various stages of the roller gap. The equivalent stress diagram and the equivalent strain diagram were obtained. The straightening quality was improved and rationality of the roller type was verified, which provided the theoretical guidance for practical application.
出处
《机械设计与制造》
北大核心
2014年第12期89-92,共4页
Machinery Design & Manufacture
基金
辽宁省科技厅(ZXLGL-1307)
