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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。
Both the mold and the blank are set as elastic-plastic body. The thermo-mechanical coupled elastic-plastic finite element model of the strip-shaped bionic non-smooth wedge cross-rolling mold is established, and the wear resistance of the wedge cross-rolling mold is studied. The wear, stress, strain and real-time temperature distribution of bionic mold surface during rolling were obtained and compared with the corresponding parameters of smooth mold. The results show that the wear of the bionic mold mainly concentrates on the wedges, especially on the edge of the boundary of the profiles. The wear resistance of bionic mold is better than that of smooth mold, but the stress and strain of mold surface are larger than those of smooth mold. The research results have a good guiding significance for improving the service life of cross wedge rolling dies.