楔横轧反楔堆轧改善空心零件过渡轴肩的壁厚减薄

楔横轧随形轧制空心零件在过渡轴肩位置会产生壁厚减薄，降低零件的力学强度，改善轴肩的壁厚状况是必须解决的问题。本文基于有限元模拟方法，揭示空心零件成形时壁厚减薄的产生原因，提出采用楔横轧反楔堆轧改善轴肩壁厚的成形方法，分析反楔堆轧增加轴肩壁厚的主要影响因素，从而获得轴肩壁厚增厚的成形方法和最佳条件，实现了楔横轧随形轧制空心零件轴肩位置的显著增厚。通过轧制试验，验证了有限元模拟分析模型的可靠性。

Improving the wall thinning of the transition shoulder with anti-wedge upset rolling in cross wedge rolling hollow parts

Wall thinning occurs at transition shoulders in cross wedge rolling ( CWR) hollow parts without a mandrel, which will reduce the mechanical strength of the parts, so improving the wall thickness of the shoulder must be resolved. Based on finite element simulations, the cause of wall thinning during the forming process is revealed. A forming method of the anti-wedge upset rolling is proposed to improve the wall thickness of the shoulder, main factors that affect the increase of wall thickness are analyzed, the method of increasing wall thickness and the optimum conditions are obtained, so that a significant increase in wall thickness of the shoulder is achieved for cross wedge rolling hollow parts. The finite element model is validated by a rolling experiment.