This mandrel is an important part in the cold rolling mill of aluminum strip, and its structure is relatively classic, and it is also one of our company's characteristic products. We have cooperated with aluminum strip cold rolling mill manufacturers for a long time to manufacture this product mandrel. As an important part, the principal axis adopts front and rear integrated shafts. The material is 42CrMo alloy forgings. After quenching and tempering, it has high strength and toughness, and has high fatigue resistance. limit and shock resistance. The inclined surface of the working surface of the principal axis is provided with a copper sliding plate inlaid with graphite columns, which effectively improves and enhances the wear resistance of the fan-shaped plate and the working inclined surface of the principal axis, so that the mandrel can slide more flexibly when working. The segment plate is made of 42CrMo alloy structural steel, and the properties of the material are improved after annealing and tempering treatment. The segment plate has a wave tooth shape, which reduces the gap of the mandrel after the assembly of the four segment plates, and the wave tooth shape corresponds one by one to enhance the strength of the mandrel. After the single piece of the mandrel is processed, it is ground and assembled, and then the true circle of the mandrel (outer arc of the segment plate) is refined, which effectively improves the consistency of the effective dimensions of the mandrel and reduces the runout value.
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