In recent years, North China Aluminum Co., Ltd. has set up a special research team under the situation that the aluminum foil rolling mill backup roll and backup roll bearing inner ring are tense. The repaired scrapped backup roll is used to maintain production, and the normal operation of the seven aluminum foil rolling mills is ensured. During the repair process, the team focused on repairing, exploring, and accumulating experience to lay a good foundation for the localization of support roller bearings and their inner rings.
The original purchase cycle of support roller bearings was 6 months, and the price was about 50,000 yuan per set. At present, the procurement cycle has been extended from 18 months to 24 months, and the price has also risen to 90,000 yuan to more than 100,000 yuan per set.
The team under the leadership of the company's leadership and procurement department has started to localize the support roller bearing and the support roller bearing inner ring. Through one year's data collection, material selection, experience analysis, and factory screening, they will finally support it. Roller bearings and inner rings were developed, first used in a better running 1# rolling mill, fully meets the requirements, and once again cooperated with the manufacturer Chengdu Kehua Company to manufacture 4 sets of bearings, and in poor running 4# The aluminum foil in the mill test has also been successful.
The test proves that the aluminum foil rolling mill support roller bearing and bearing inner ring developed by North China Aluminum Co., Ltd. can completely replace the imported bearing. Moreover, the domestic bearing manufacturing cycle is generally 4 months. If the user purchases, the time can be saved for more than one year. Only about 50% to 60% of imported products can save half the cost.