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Flying shears are commonly used in production lines such as steel rolling and papermaking. In the continuous rolling billet workshop or small section steel workshop, it is placed at the rear of the rolling line to cut the rolled piece into fixed lengths or only cut the head and tail. In cold and hot steel workshops, various types of flying shears are equipped in the transverse shear unit, heavy shear unit, galvanizing unit, and tin plating unit, which can cut the strip steel into fixed length or specified weight steel coils. The widespread use of flying shear is conducive to the rapid development of steel rolling production towards high-speed and continuous direction. Therefore, it is one of the important links in the development of steel rolling production. Flying shears have high requirements for cutting edges due to their fast cutting speed and high frequency. The reliable quality of flying shears ensures their continuous and stable operation.