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全苏管材工业科学研究与设计工艺研究所研制成功一种周期式冷轧钢管的新方法——二辊—多辊冷轧法,并在试验厂的15～30轧机上做了试验。在轧制过程中,装有异形支承板2的机架1(见图)移动,轧辊3沿此支承板滚动。管坯4通过轧辊变半径轧槽段(Ⅰ段)进行减径,这时沿管壁不施加压力(即不进行减壁)。因此,这一段长度减小(这与在轧机上进行的冷轧过程相类似)。然后,通过轧辊沿支承
Quan Su Pipe Institute of Industrial Science Research and Design Institute of the successful development of a new cycle of cold-rolled steel pipe method - two-roll - multi-roll cold rolling method, and in the test plant 15 ~ 30 mill experiments. During the rolling process, the frame 1 (see the figure) equipped with the profiled support plate 2 is moved along which the roll 3 rolls. The tube blank 4 is reduced in diameter by means of a variable radius groove section (section I) of the roll, at which time no pressure is applied along the tube wall (ie no wall reduction). Therefore, the length of this section is reduced (this is similar to the cold rolling process carried out on the rolling mill). Then, along the roll support