轧制力参数对斜轧穿孔孔型的影响

Influence of Separating Force and Axial Force of Point Bar on Piercing Pass of Two Roll Rotary Piercer

为了进行斜轧穿孔模型化研究，分析了二辊斜轧穿孔轧制力对轧辊开度、变形参数和穿孔毛管壁厚均匀性的影响以及顶头轴向力对变形参数和毛管壁厚均匀性的影响。结果表明：轧制力引起的静态轧辊辗轧角变化可以忽略，而轧制力对毛管壁厚的影响很显著。顶头轴向力引起的顶头位置变化对轧件壁厚及其均匀性的影响是值得重视的。

With a view to studying the modeling of the rotary tube piercing, the influence of the separating force on the roll opening of the rotary rolling piercer, the parameters of the piercing deformation and lateral uniformity of the wall thickness of the shell pierced are theoretically analyzed. Furthermore, the effects of the axial force of the point bar on both the deformation parameters during piercing process and dimensional precision of the wall thickness are discussed. It is noteworthy that the variation of the toe in angle caused by separating force may be neglected, but the effect of the separating force on the wall thickness is remarkable. The effects of position variation of the point bar, due to its axial force, on the wall thickness of the shell pierced and its lateral uniformity merit attention.