The spiral blade cold rolling mill rolls are different from ordinary two-high rolling mills. The first difference lies in the processing area of the rolls. The processing area of an ordinary two-roll mill is located in the middle of the roll. The processing area of the roll is the maximum diameter of the roll, and the roll neck gradually becomes thinner toward both ends. Therefore, the middle rolling processing area has the greatest strength and can withstand the greatest rolling force. The spiral blade cold rolling mill roll is a tapered roll, and the taper is at one end of the roll, and the other end is fixed in the bearing seat, and the bearing seat is used as a support.
The processing technology of spiral blade cold rolling mill rolls is more complex than that of flat rolls, and the processing accuracy requirements are higher. The selected material is a cylinder, which is rough turned and the excess blank is removed. It is especially important when processing cones. Special tooling must be designed and the processing angle of the lathe must be changed to produce a cone with accurate angles and good surface finish. The spiral blade cold rolling mill rolls produced by Gongyi Huarui Heavy Industry have high dimensional accuracy, good surface finish and long service life.
After the rolls are rough turned, the next process is quenching. Quenching can improve the surface hardness of the spiral blade cold rolling mill rolls. Only with a certain hardness can the wear of the rolls be reduced during the rolling process. Quenching treatment is divided into surface heat treatment and overall heat treatment. Surface heat treatment is to heat the workpiece surface at a certain distance, heat it to a certain temperature, maintain it for a certain time, and then slowly cool down. Overall quenching refers to placing the workpiece in a vacuum furnace and heating it as a whole. Overall heating can ensure that the hardness of all parts of the workpiece is the same.
Finally, the spiral blade cold rolling mill is processed by a roll grinder to improve the surface finish and control the dimensional tolerances of each part, so that qualified rolls are made.
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