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本发明的目的,就是提出一种连续轧管的方法和实现这种方法的连续轧管机。采用这种方法和设备可使空心厚壁管坯达到所要求的减径和减薄变形,勿需中间加热,而金属损耗率最少。本文提出的连续轧管法包括空心管坯在芯棒上减壁和随后的减径这两个阶段,采用芯棒和交错布置的数个减壁孔型组和数个减径孔型组,使空心管坯减壁和减径的过程至少交替进行两次。芯棒位于减径
The object of the present invention is to propose a method of continuous tube rolling and a continuous tube rolling machine that implements this method. With this method and apparatus, the hollow, thick-walled tubes can be made to achieve the required reduction and ironing without intervening heating with minimal metal loss. The continuous tube rolling method proposed in this paper consists of hollow mandrel in the mandrel on the wall and then reducing the diameter of the two stages, the use of mandrel and staggered arrangement of the number of reduced hole group and a number of reduced hole group, The process of reducing and reducing the hollow shell by alternating at least twice. Mandrel is located on the reduced diameter