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在综合分析现有各种料轧延伸工艺特点的基础上，提出了由多投雏形辊、双曲率导板和轧后移动短圆柱芯棒构成的延伸工艺．试验结果表明，该工艺可行，能使斜轧延伸机结构简化，操作更方便。该工艺可供小型轧管机组改造参考。
Based on the comprehensive analysis of the existing characteristics of various material rolling and extending processes, an extension process consisting of a multi-casting prototype roller, a double curvature guide plate and a rolling short cylindrical mandrel rod is proposed. The test results show that the process is feasible, which can make the structure of the slash-rolling extension machine be simplified and the operation is more convenient. The process can be used for small-scale rolling pipe unit transformation reference.