提高MPM连轧管机组芯棒使用寿命的措施

Actions for Enhancing Service Span of MPM-used Mandrels

芯棒是限动芯棒连轧管机组中最重要的热变形工具,其表面质量直接关系到产品的尺寸精度以及管体的内表面质量,同时,它也是限动芯棒连轧管生产过程中损耗最大的一种轧制工具,其使用效果决定着钢管生产成本的高低。在分析芯棒失效形式和原因的基础上提出了提高芯棒使用寿命的措施。

Since the mandrel is regarded as the most critical thermal-deformation tool of the retained mandrel MPM pipe plant,its surface quality directly influences the dimensional tolerances and inner surface quality of the pipe as rolled.Moreover,the mandrel is also the most consumable operation tool in the rolling process of such MPM,thus its operational efficiency will determine the cost-effectiveness of the pipe production line.Based on analysis of the failure types and causes of the mandrel,actions for enhancing the mandrel service span are proposed.