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在机架反行程时,使金属强制变形,可以提高冷轧管机的生产率。尼柯波尔南方钢管厂,两年来在固定机架的ХПТР15—30冷轧管机上,使机架在正,反行程之前均采用回转送进管坯(双回转送进)的办法进行了试验,从而保证了生产率的提高。过去在移动机架ХПТР15—30冷轧管机上进行的双回转送进试验,在提高生产率方面,由于轧机工作不稳定而没有成功。这主要是轧辊架相对行程长度短和金属作用在轧辊上的压力增加(20～25%)
In the rack back stroke, the metal deformation, can improve the productivity of cold rolling mill. Nikebo Southern Pipe Plant, two years in a fixed rack ХПТР15-30 cold rolling machine, the rack in the forward and reverse stroke are used before rotating into the tube (double rotary feed) approach was tested , Thus ensuring the improvement of productivity. In the past, the double-feed test on the moving frame ХПТР 15-30 cold rolling mill failed to improve the productivity due to the unstable work of the mill. This is mainly due to the short relative stroke length of the roll stand and the pressure increase of the metal acting on the roll (20-25%)