所谓联合穿轧法,即是在一台三辊斜轧机上在一道次中同时完成穿孔、轧管和均整三道工序的生产方法。早在50年代,国外就开始研究三辊联合穿轧法,在理论与实践上均取得一定成果。60年代,我国哈工大等一些单位也对联合穿轧法进行了研究。1977年,太原重型机械学院设计出 The so-called joint wear-rolling method, that is, in a three-roll cross-rolling mill in a single pass at the same time to complete the perforation, rolling pipe and the whole three processes of production methods. As early as the 1950s, foreign countries began to study the three-roll joint wear-rolling method, both in theory and in practice to achieve some results. In the 1960s, some units such as Harbin Institute of Technology conducted a study on the joint wear-rolling method. In 1977, Taiyuan Heavy Machinery Institute designed