Abstract: At present, the cold rolling mill market is mainly composed of two-roll conical roll type and three-roll circumferential with the round roll type mill. The two-roll tapered roll type cold rolling mill has the advantages of large pass deformation and high production, but low product accuracy. Three-roll circumferential roll type cold rolling mill has the characteristics of high rolling accuracy, but the pass deformation is small. So, a new three-roll pilger surface configuration design method is constructed by combining the traditional two-roll tapered roll design method with the three-roll circumferential homocircular roll section design method, which is used to solve the defects of low precision of traditional two-roller conical roll cold rolling mill products. By comparing the roundness, rolling force, three-way stress, residual stress, rebound and so on, it is concluded that the tube rolled by the new three-roll Pilger heterosexual surface configuration is better than the tube rolled by the two-roll tapered roll configuration.

Key words: Pilger rolling, cold roll forming, three-roll rolling, roll design