A surface passivation system for increasing the service life of edt textured cold rolls

Abstract

The invention relates to the technical field of cold roller manufacturing, and discloses a surface passivation system for prolonging service life of EDT roughened cold rollers. The system comprises rotary driving equipment and a pulse electrochemical burr removing device; the pulse electrochemical burr removing device comprises a pulse power supply, a tool electrode and an electric brush; the electric brush is contacted with outer circle surfaces of cold rollers; the head part of the tool electrode is near roughened outer circle surfaces of the cold rollers; a gap for enabling electrolyte to pass through is formed between the head part of the tool electrode and the roughened outer circle surfaces of the cold rollers; an electrolyte nozzle with a spout aligned to the gap is arranged above the gap; the electrolyte nozzle is connected to an electrolyte box through a pump and a pipeline; an electrolyte collecting tank for collecting electrolyte is arranged under the roughened outer circlesof the cold rollers; and the electrolyte collecting tank is connected with the electrolyte box. The system prolongs the service life of the EDT roughened cold rollers, improves the quality of rolledparts, and reduces the roller change efficiency.

Description

technical field [0001] The invention relates to the technical field of cold roll manufacturing, in particular to a surface passivation system for improving the service life of EDT textured cold rolls. 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 ...

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 , had 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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