Manufacturing process for cold-rolling roll

Abstract

The invention relates to the technical field of rolling roll manufacturing, and discloses a manufacturing process for a cold-rolling roll. The manufacturing process for the cold-rolling roll sequentially comprises the procedures of ingot casting, forging, heat treatment after forging, rough turning machining, quenching and tempering treatment, finish turning machining, surface quenching, cold treatment, low-temperature tempering, accurate grinding machining, surface texturing, and electrochemical passivation, wherein in the procedure of surface quenching, double-frequency quenching treatment is carried out on the working surface of the cold-rolling roll through a double-frequency quenching machine tool; in the procedure of surface texturing, texturing treatment is carried out on the working surface of the cold-rolling roll through an EDT electric spark texturing machine tool; and in the procedure of electrochemical passivation, deburring passivation treatment is carried out on microcosmic tip parts on the working surface of the cold-rolling roll through pulse electrochemical deburring equipment. According to the manufacturing process for the cold-rolling roll, the service life of the EDT textured cold-rolling roll is prolonged, the quality of a rolled part is improved, and the roll changing frequency is reduced.

Description

technical field [0001] The invention relates to the technical field of roll manufacturing, in particular to a manufacturing process of a cold roll. Background technique [0002] Cold rolling roll is the core part of cold rolling mill and cold rolling mill, which is mainly used for rolling metal plates such as strip steel and thin plate. During rolling, the surface roughness of the cold roll directly affects the stamping formability of the metal plate, and the surface roughness of the metal plate is completely formed by the surface roughness and peak number of the cold roll after texturing. Users in the automotive industry, home appliance field, and deep-processing field of cold-rolled sheets (such as galvanized steel sheets) all require the surface of cold-rolled sheets to have a special textured structure. For this reason, it is necessary to roughen the surface of the cold rolling roll, so that the surface of the rolled metal plate forms a completely roughened or matte sur...

AI Technical Summary

Problems solved by technology

[0005] However, the EDT texturing technology still has the following problems: the roll treated by EDT texturing technology will form a concave textured appearance on the roll surface, which is composed of many peaks that are easy to break and wear. Direct use on the machine will affect the surface roughness retention and wear resistance of the roll, and its service life will be shorter

Even if a layer of hard chromium coating is added to the surface of the roll after roughening, there are still problems such as rapid attenuation of the surface roughness of the roll, poor shape retention, roll marks, and color difference in the rolling production. In order to ensure the surface quality of the steel plate, have to change rolls frequently

Therefore, it is necessary to further improve the existing EDT texturing technology to overcome the shortcoming of the short service life of the EDT texturing cold roll in the prior art

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