穿孔机管坯热定心设备的改进

Modification of Billet Hot-centering Unit of Piercing Mill

介绍了江西洪都钢厂有限公司对热轧无缝钢管穿孔机管坯热定心设备的改进及使用情况。实践证明,以"锥模导入规圆、依模确定坯心、顶针模中定心"为主要功能的热定心设备,其定心位置精度远高于端面处于自由状态的其他形式的热定心设备。

Elaborated in the essay are the modification of the billet hot-centering unit of the piercing mill in the hot-rolled seamless steel pipe production line by Jiangxi Hongdu Steel Works Co.,Ltd.,and the post-modification operation situation of the mill.The hot-centering unit features major functions,namely,guiding the billet into the tapered mould,setting the billet center as per the mould,and centering the billet in he mould via the punch pin.The operation practice shows that the centering accuracy of the modified device is much higher than that of any other centering device which features operating with the billet end face in a free-of-control state.