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采用Deform-3D数值模拟软件,对具有端部变形的楔横轧件成形过程中的材料流动规律和特点进行了计算机模拟仿真,结合实际生产和物理模拟实验,分析了轧件形成端部凹心的原因。提出采用锥形坯料的方式消除端头凹心,并通过数值模拟研究了锥角大小对轧件端头凹心深度的影响,得到了无端头凹心的坯料形状和尺寸。模拟结果表明,采用具有锥形端部的坯料成形楔横轧件可以减少甚至消除成形后轧件端头凹心缺陷,且端头凹心的深度随着端部锥角的减小而减小,当端部锥角为120°时,轧件端头凹心已经基本消除。
Deform-3D numerical simulation software was used to simulate the law and characteristics of the material flow during the forming process of cross-wedge rolling with end deformation. Based on the actual production and physical simulation experiments, s reason. The conical blank is adopted to eliminate the concave end of the tip, and the effect of the taper angle on the depth of the concave end of the rolled piece is studied by numerical simulation. The shape and size of the blank without end concave are obtained. The simulation results show that the use of tapered cross-section billet forming blank can reduce or even eliminate the formation of post-forming rolling center recess defects, and the depth of the tip of the recess decreases as the tip taper angle decreases , When the tip cone angle of 120 °, the rolling end of the recess has been basically eliminated.