Straightening system for improving plate shape of oriented steel finished product and control method of straightening system

Abstract

The invention relates to the technical field of oriented silicon steel production and manufacturing, in particular to a straightening system for improving the plate shape of an oriented steel finished product and a control method thereof. According to the straightening system for improving the plate shape of the oriented steel finished product, a variable frequency motor, an absolute value encoder, a straightening roll, a deformation detection device and a temperature sensor are matched, so that a preheating furnace outlet steel strip plate and the rolling reduction of the straightening roll can be accurately controlled, and the buckling defect of an oriented steel strip is effectively eliminated; the straightening device and the deviation correcting device are integrally arranged, so that steel belt deviation caused by pressing of a straightening roller can be corrected in real time, and the trafficability of the steel belt is improved; the straightening device is arranged in the area outside the furnace, and the cleaning device is arranged, so that the roller surface states of the deviation rectifying roller and the straightening roller can be conveniently monitored and cleaned, and the capability of stable production on site is improved; the control method is provided, the working efficiency of the straightening system can be effectively improved, and closed-loop automatic control over the straightening system is achieved.

Description

technical field [0001] The invention relates to the technical field of production and manufacture of grain-oriented silicon steel, in particular to a straightening system for improving the shape of a finished grain-oriented steel and a control method thereof. Background technique [0002] With the deepening of the transformation of the State Grid, the installed capacity is getting larger and larger, the utilization rate of the iron core material is getting higher and higher, and the requirements for the quality of the edge plate shape of the electrical steel are getting higher and higher. [0003] After the high magnetic induction oriented silicon steel has undergone rolling, decarburization annealing and high temperature annealing, the overall shape of the steel strip has deteriorated to a certain extent, and it needs to be improved through the stretching and leveling process. In this process, the insulation needs to be completed at the same time. Coating and sintering of l...

AI Technical Summary

Problems solved by technology

However, due to the limited stretching and flattening effect of the unit, it has no obvious improvement effect on the existing plate shape problems, especially in eliminating plate shape defects such as scooping and wave shape in the plate, the effect is not ideal

Taking the existing stretch leveling unit of a certain silicon steel department as an example, after stretch leveling and annealing, there are still about 500 to 1000 meters of bending defects in the steel strip, causing this part of the steel coil to be judged as unqualified

[0004] In the prior art, a straightening device is usually added in the high-temperature zone (heating furnace and soaking furnace) for stretching and leveling to correct the shape of the steel strip. And because it is located in the furnace, it is impossible to clean the roller surface, so it is actually difficult to put it into large-scale production for long-term application

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