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Method for online detection of roll cooling

A detection method and roll technology, applied in the field of roll cooling, to overcome the lack of striking force and ensure safe use

Active Publication Date: 2010-02-17
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In order to overcome the above problems, the object of the present invention is to provide an online detection method of the cooling state of the roll, which can accurately monitor the water cooling problem of the roll, and timely monitor the blockage of the cooling water nozzle, Problems such as shedding, serious deformation, wear, frame deformation and faucet angle deflection, etc., ensure the safety of the roll and the quality of the product

Method used

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  • Method for online detection of roll cooling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Roll surface coating:

[0036] The selection principle of the paint coated on the roll surface: it has sufficient adhesion, and at the same time, it can clearly retain the impact track of the roll cooling water under the impact of the 10bar roll cooling water. In this embodiment, a medium blue phenolic varnish (F03-1, standard number Q / GHTC25) is selected. This varnish has good gloss and physical and mechanical properties, and can be dried at normal temperature or at low temperature. Prepare rolls that need to be installed and checked for roll cooling water. Coat the rolls used for testing 25-45 minutes in advance and put them aside the machine for use. Ensure that the paint film is in a semi-dry state when the rolls are pushed into the rack. At an ambient temperature of 25°C, the thickness of the paint coated on the roller surface is controlled at 0.01mm to 0.05mm, and the paint is evenly applied by brushing, and the thickness of the dry film is 10 to 25μm / pass;

...

Embodiment 2

[0053] The coating is a dark blue phenolic varnish, and the coating method is spraying. The dry film thickness during spraying is 10-15 μm / pass, and the water pressure is 7bar-10bar. Others are the same as in Example 1.

Embodiment 3

[0055] The paint is dark red phenolic varnish, the dry film thickness is 15-25 μm / pass when spraying, and the water pressure is controlled at 1 bar-5 bar. Others are the same as embodiment 1.

[0056] Table 1 Judgment criteria and countermeasures for roll cooling of the present invention

[0057] state

[0058] As can be seen from the above, the online detection method for roll cooling of the present invention can accurately judge the working state of the roll cooling water, thus, problems such as wear, blockage, and deflection of the cooling water nozzle can be found in time, the production capacity of the roll is improved, and the production capacity of the roll is guaranteed. security.

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Abstract

The invention provides a method for online detection of roll cooling, which comprises the following steps: coating a coating material with the thickness of 0.01 to 0.05 millimeter on the surface of aroll; placing the coated roll into a stander in a normal production state; jetting cooling water onto the fixed roll for 5 to 6 minutes; and judging the working condition of a roll cooling water system according to the peeling-off state of the coating material on the surface of the roll so that the cooling problems such as nozzle abrasion, blockage, deflection, frame deformation and the like can be timely discovered. The method has accuracy and timeliness, and can improve the productivity and ensure the safety of production.

Description

technical field [0001] The invention relates to roll cooling of a finish rolling stand in the field of metallurgy, in particular to an online detection method for roll cooling. Background technique [0002] The hot-rolling and finishing seven-stand continuous rolling mill is the most critical unit in the entire rolling line, and it is also the last unit for hot-rolled strip from semi-finished products to finished products. Since the roll cooling water in the frame is installed on the wiper of the frame guide plate, in the daily production process, the frame is often deformed due to wear of the guide plate, impact deformation and scrap steel in the frame, resulting in deformation of the roll cooling water nozzle , Falling off, and misalignment of the position cause problems in the cooling of the finishing rolls. [0003] For example, the coverage of the cooling water on the work roll is deviated, the spray angle is changed, the nozzle diameter of the cooling water nozzle is ...

Claims

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Application Information

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IPC IPC(8): B21B38/00B21B27/10
Inventor 李华明陈占福王军汪长安
Owner BAOSHAN IRON & STEEL CO LTD
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