锻压技术

行星轧制过程中滑动系数的研究

英文标题：Research on sliding coefficient of planetary rolling process

作者：曾庆龄臧勇朱旭车延明

分类号：TG339

出版年,卷(期):页码：2015,40(5):84-89

摘要：

采用理论分析方法，通过对行星轧制过程中横截面处的金属流动情况以及轧件的受力情况和扭矩的计算方法进行分析，得到了轴向滑动系数以及切向滑动系数的计算方法，将其与有限元模拟计算的结果进行对比分析。结果表明：变形区内的切向速度先缓慢减小，然后急剧减小到最小值，再有所增大；而变形区内轴向速度先缓慢增加，再急速增大，随后有个缓慢变化区，最后有所增大。本方法计算得到的滑动系数的变化趋势与采用有限元仿真分析得到的结果变化趋势是一致的；验证了该理论计算方法的正确性。通过对轧制变形区内的滑动系数进行理论计算，可以更为准确地描述轧制过程中的金属流动规律。

With theoretical analysis method, the calculation methods of axial sliding coefficient and tangential sliding coefficient were obtained by analyzing the metal flow of cross-section and the force and torque of the rolled-piece in planetary rolling process. The theoretical results were compared and analyzed with the numerical simulation results. The results show that the tangential velocity in the deformation zone reduces slowly at first, and then decreases to the minimum value sharply, after that it increases. The axial velocity in the deformation zone increases slowly at first, then increases rapidly, and finally increases through a slowly changing zone. The compared results show that the trends obtained by theoretical calculation are consistent with that obtained by finite element analysis, so the theoretical analysis method is verified. The metal flow rule in the rolling process is described accurately by calculating the sliding coefficient.

基金项目：

广东省教育部科技部产学研结合项目(2010B091000003)

曾庆龄（1985-），女，博士研究生臧勇（1963-），男，硕士，教授，博士生导师

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