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本文通过数学推算方法，提出了ＬＷＹ－４００冷弯成型机组８辊矫直机设计参数的调整。使矫直范围扩展到圆管为Φ２０．８４～１１４ｍｍ，方矩形管为：１５×３５～９０×９０ｍｍ。
In this paper, mathematical calculation method, proposed LWY-400 cold-formed unit 8-roll straightening machine design parameters adjustment. The straightening range is extended to the tube for the Φ20.84 ~ 114mm, rectangular tube is: 15 × 35 ~ 90 × 90mm.