The backup roller used in the 5-meter mill is difficult to manufacture because of its long roller body and large diameter. The backup rollers used in the domestic five-meter mill are imported from abroad. In order to change the long-term reliance on imported and controlled by ultra-large support rollers, China Shuangjin stepped up the research and development of ultra-large support rollers after the 160 MN hydraulic press was put into trial production. After careful technical preparation, on October 10, 2008, China's secondary smelting and pouring out 450 tons of vacuum steel ingots for forging five meters of backup rolls. On November 1, the steel ingot successfully forged a 5 meter rolling mill. Support roller forging blanks. In April this year, forgings began machining. In order to ensure the successful manufacture of this key product, China's second-tier related units have closely coordinated and coordinated operations, and have successively formulated strict processing techniques and operating procedures, which have created conditions for the production of the first domestic 5-meter mill backup roll.
The first domestically produced five-meter mill backup roll was launched in China
On June 12th, China's second double-rolled production roll of the first 5-meter mill was completed. The support roll diameter was 2302mm, total length was 11226mm, and the delivery weight was 226.4 tons. It is currently the largest support roll in China and the first one. Domestic five-meter mill backup roller.