仿生非光滑条纹楔横轧模具耐磨性研究

Study on Wear Resistance of Bionic Non Smooth Stripes Cross Wedge Rolling Die

将模具和坯料均设置为弹塑性体,建立了条纹形仿生非光滑楔横轧模具的热力耦合弹塑性有限元模型,对楔横轧模具进行了耐磨性研究。得到了轧制过程中仿生模具表面的磨损、应力、应变和实时温度的分布情况,并与光滑模具的对应参数进行了比较。结果表明:仿生模具磨损主要集中在楔面上,尤其在型面交界的棱边上最为严重。仿生模具的耐磨性优于光滑模具,但模具表面应力和应变值比光滑模具大。研究结果对提高楔横轧模具的寿命具有较好的指导意义。

The die and billet were both set as elastic-plastic bodies. The thermal-mechanical coupled elastic-plastic FE model of bionic non smooth stripes cross wedge rolling die was built. The abrasion performance of cross wedge rolling was studied. The distribution of wear, stress, strain and real-time temperature on the bionic die surface was obtained during the rolling, and the corresponding parameters between the smooth die and the bionic non-smooth die were compared. The results show that the wear of bionic die mainly concentrates on the wedge surface, especially the edge of on the surface is the most serious. The abrasive performance of bionic die is better than the smooth die. However, the stress and strain on bionic die surface are greater than the smooth die. The research results have guiding significance for improving the cross wedge rolling die life.