Non-oriented silicon steel cold continuous rolling device and thickness control method

Abstract

The invention discloses a non-oriented silicon steel cold continuous rolling device and a thickness control method, and belongs to the technical field of non-oriented silicon steel cold rolling and forming. The non-oriented silicon steel cold continuous rolling device comprises a five-rack six-roller cold continuous rolling mill and a double-drum coiling machine, chamfers are correspondingly arranged at the end parts of intermediate rollers on each cold rolling unit of the five-rack six-roller cold continuous rolling mill, chamfers are correspondingly arranged at the end parts of working rollers of first, second and third cold rolling units of the five-rack six-roller cold continuous rolling mill, and the chamfering heights of the working rollers of the first cold rolling unit and the second cold rolling unit are correspondingly greater than the chamfering height of the working roller of the third cold rolling unit. The non-oriented silicon steel cold continuous rolling device has thebeneficial effects that the structure of the cold continuous rolling device and the process of cold continuous rolling are improved and optimized, the measuring accuracy of the longitudinal thicknessof strip steel is ensured, the control force of the transverse thickness of a non-oriented silicon steel strip is improved, the length of out of tolerance thickness of the steel strip head and tail isreduced, the edge thinning of the non-oriented silicon steel strip is reduced, and the qualification rate of longitudinal thickness and transverse thickness of the steel strip is increased.

Description

technical field [0001] The invention relates to the technical field of non-oriented silicon steel cold rolling and forming, in particular to a non-oriented silicon steel cold rolling equipment and a thickness control method. Background technique [0002] Non-oriented silicon steel is widely used in motor stators and rotors, and has extremely high requirements on the accuracy and uniformity of longitudinal and transverse thickness tolerances. When the current UCM rolling mill produces non-oriented silicon steel, due to the equipment and rolling process, the qualified rate of the longitudinal thickness and transverse thickness of the rolled strip is low, which is mainly reflected in the following aspects: 1) The end of the UCM rolling mill A thickness gauge is set behind the stand for thickness monitoring at the intermediate point. When the thickness gauge fails, it will cause batch thickness discrepancies. The back of the coil is manually increased by the operator. If the ac...

AI Technical Summary

Problems solved by technology

When the current UCM rolling mill produces non-oriented silicon steel, due to the equipment and rolling process, the qualified rate of the longitudinal thickness and transverse thickness of the strip after rolling is low, which is mainly reflected in the following aspects: 1) The end of the UCM rolling mill A thickness gauge is installed behind the frame to monitor the thickness of the middle point. When the thickness gauge fails, it will cause thickness discrepancies in batches; 2) The low-speed rolling time of non-oriented silicon steel after coiling is long After rolling, the operator manually increases the speed. If the speed is increased too late, the length of the thickness of the head and tail will be longer, resulting in a longer length of the thickness of the head and tail. , and in order to ensure the shape of the plate, the roll shifting amount of the intermediate roll is small, the rolling force causes the work roll deflection to be large, and the transverse thickness control ability is poor; 4) most of the current UCM rolling mills produce non-oriented silicon steel. The roll type mainly adopts flat rolls, and the work rolls of the first stand or the first two stands of some UCM rolling mills use tapered rolls with a small taper. Severe elastic flattening will occur between the work roll and the steel strip, resulting in a large transverse thickness difference after rolling;

[0003] 5) The bending force of the intermediate rolls and work rolls of the first four stands of the UCM rolling mill is automatically set according to the secondary computer. Usually, the bending force is small, resulting in serious edge thinning. The target plate of the last stand of the UCM rolling mill The shape curve is slightly wavy or flat, resulting in a small bending force at the end stand, which is not conducive to reducing edge thinning

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