Large thick-wall special-shaped pipe cold roll forming method

• Main Authors: LIU NING, WEN WEILING, MA JINGLIANG, WEI DIMING
• Format: Patent
• Language: Chinese; English
• Published: 18.05.2016
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING

The invention belongs to the technical field of machine manufacturing, and particularly relates to a large thick-wall special-shaped pipe cold roll forming method. The method comprises the following steps that firstly, at the round pipe selecting stage, a round pipe with the corresponding diameter is selected according to the specification of a needed square pipe or rectangular pipe; secondly, at the rough forming stage, five universal rolling mills are totally arranged, transformation rollers of flat rollers and vertical rollers are adopted for enabling the round pipe to be formed into the needed square pipe or rectangular pipe, wherein the flat rollers and the vertical rollers are symmetric, and the flat rollers are perpendicular to the vertical rollers; thirdly, at the finish forming stage, the square pipe or rectangular pipe formed through rough rolling is subjected to finishing through a sixth flat roller rolling mill, and the square pipe or rectangular pipe can meet various precision requirements; and f