Rotary rolling mill and method for rolling of tubular products

Details Rotary rolling mill and method for rolling of tubular products Rotary rolling mill and method for rolling of tubular products

B - Operations, Transporting

21

B

80/17

B21B 17/00 (2006.01) B21B 19/02 (2006.01) B21B 19/06 (2006.01)

Patent

CA 1189364

- 17 - ROTARY ROLLING MILL AND METHOD FOR ROLLING OF TUBULAR PRODUCTS ABSTRACT The present invention is an improvement of such methods as the Stiefel-Mannesman piercing, and the Mannesmann piercing methods with a pair of driven rolls which impart a screw movement to the work piece, and has the roll axis inclined to the centerline of mill. Instead of a conven- tional pair of driven disc rolls or shoes, one driven disc roll and one shoe or one guide roll are used in the invention to form the rolling pass together with the driven rolls, and the centerline of pass is greatly off set from the centerline of mill toward said one shoe or guide roll. The operating efficiency and quality of tubular products are simultaneously enhanced.

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