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Method for rapidly eliminating nodules on surfaces of furnace rollers

A furnace roller and nodulation technology, which is used in grinding machine parts, workpiece feed motion control, grinding machines, etc., can solve problems such as economic losses and batch products that do not meet requirements.

Active Publication Date: 2021-12-17
马钢(合肥)钢铁有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the furnace chamber in the continuous annealing furnace is a sealed space filled with nitrogen and hydrogen, people cannot enter the furnace to deal with nodules
Therefore, once roll marks are produced on the surface of the steel strip, it will generally cause batch products to fail to meet the requirements.
If the nodules cannot be disposed of online, the furnace needs to be opened and manually entered into the furnace for treatment. The cost of each opening and starting of the furnace is about 300,000, causing huge economic losses

Method used

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  • Method for rapidly eliminating nodules on surfaces of furnace rollers
  • Method for rapidly eliminating nodules on surfaces of furnace rollers
  • Method for rapidly eliminating nodules on surfaces of furnace rollers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preliminary steps:

[0040] When the continuous annealing furnace is in normal operation, if the surface appearance inspection equipment or artificially finds roll marks on the surface of the steel strip (SPCC: generally cold-rolled carbon steel sheet and steel strip) 3, immediately take measures to reduce the transmission speed of the steel strip 3, reduce the The flame nozzle method reduces the temperature of the continuous annealing furnace, etc. The reduction of the speed is to reduce the output of defective steel strips, and the temperature of the annealing furnace is correspondingly reduced to avoid the overheating and melting of the steel strips due to the reduced speed. Generally, the thickness of the steel strips in normal production is 0.1 to 3.0 mm, the width is 500~1800mm.

[0041] Manually intercept part of the steel strip 3 carrying the roll marks, grab this part of the steel strip 3 to the quality inspection station, measure the length of the adjacent rol...

Embodiment 2

[0056] (2) The correction roller in the control roller group drives the steel belt to reciprocate and swing along the furnace roller axis to remove nodules:

[0057] Some furnace marks are caused by burrs on the steel strip 3, which are in the shape of flat flakes. This kind of nodules 2 cannot be pressed into the inside of the steel strip 3, so the method in the first embodiment cannot be used to eliminate them. To this end, the following method is provided to eliminate such nodules2.

[0058] In the continuous annealing furnace, there is a deviation correcting roller 12 for preventing the deviation of the steel strip 3, and the parameters of the control panel of the continuous annealing furnace are adjusted so that the furnace roller 12 in the area of ​​the furnace roller 11 carrying the nodules 2 controls the steel strip 3 along the axis of the furnace roller 11 To the reciprocating swing, because the furnace roll 11 is in a rotating state, when the nodule 2 on the furnace ...

Embodiment 3

[0060] (3) Control the positive and negative directions of the furnace rolls in the roll group to repeatedly adjust the rotation direction to remove nodules:

[0061] In order to further remove nodules 2, the present invention also provides a method for repeatedly unstrapping (releasing the tension) and establishing tension (establishing tension) for the steel strip 3, and its specific operation method is the same as that of Embodiment 1.

[0062] The rotation direction and speed of each furnace roller 11 are all controlled by the console of the continuous annealing furnace, and the motor driving the rotation of the furnace roller 11 is a frequency conversion motor, which can control the rotation speed of the furnace roller 11. When the furnace roller 11 rotates in the opposite direction to the transmission of the steel strip 3 at the same time, the steel strip 3 is unloaded. , the furnace roller 11 continues to keep rotating, and rubs on the steel strip 3, and nodules 2 fall ...

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Abstract

The invention discloses a method for rapidly eliminating nodules on the surfaces of furnace rollers. The method comprises the steps that S1, it is found that roller marks appear on the surface of a steel belt; S2, the positions of the furnace rollers carrying the nodules are locked; S3, a console is used for controlling the adjacent furnace rollers in a roller set in the area where the nodules are located to rotate in a differential mode or the single furnace roller to rotate in a variable acceleration mode; and S4, whether the roller marks on the steel belt disappear or not is observed, if so, production recovers, and if not, returning is conducted to execute the step S3. According to the method, the nodules in a furnace can be rapidly eliminated without starting the continuous annealing furnace, the nodules are rapidly treated, continuous production is guaranteed, and the nodule treatment cost is reduced.

Description

technical field [0001] The invention belongs to the field of continuous annealing heat treatment of cold rolling, in particular to a method for quickly eliminating nodules on the surface of furnace rolls. Background technique [0002] The annealing treatment of cold-rolled strip is an important part of the cold-rolled sheet production process, and is the core equipment unit of the entire continuous annealing. The quality of annealing directly affects the mechanical properties of the product. The continuous annealing unit is a continuous automatic production line composed of multiple furnace roll groups with different roll diameters. During production, the front and rear coils of the strip steel are welded together by a welding machine for continuous production. The entire annealing process includes preheating section, heating section, soaking section, slow cooling section, fast cooling section, overaging section, final cooling section and water quenching section. The strip ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B27/033B24B49/00
CPCB24B27/033B24B49/006Y02P10/20
Inventor 江欢吴德东袁家明余林阚海豹吴笑风陈红胡笛唐东东
Owner 马钢(合肥)钢铁有限责任公司
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