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Cooling method for replacing hot roll

A cooling method, a technology for hot rolling rolls, applied in the direction of rolls, metal rolling, metal rolling, etc.

Active Publication Date: 2012-12-12
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]1. Due to the high temperature of the lower machine roll (generally, the temperature of the lower machine roll is about 80 degrees), and the diameter is thick (600-900mm), due to the spray cooling water of this method Extremely non-uniform, resulting in poor cooling effect, and it takes a long time for the roll to cool down to normal temperature, especially the temperature divergence time at the center of the roll is longer;
[0005]2. Due to the certain thermal crown of the rolling roll, if it cannot be fully cooled to normal temperature, it will affect the original roll shape of the roll and eventually affect its grinding Cutting accuracy

Method used

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  • Cooling method for replacing hot roll
  • Cooling method for replacing hot roll
  • Cooling method for replacing hot roll

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Embodiment Construction

[0030] The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments.

[0031] see figure 1 As shown, the concrete steps of the cooling method for replacing the hot rolling roll of the present invention are as follows:

[0032] First, pre-cool the on-line rolls before the replacement by cooling water; then replace the pre-cooled rolls with the lower frame and hang them on the roll platform; and then naturally cool the rolls during the above-mentioned time period for replacing the rolls; Finally, the lower-line rolls on the roll-releasing platform are forcedly cooled to normal temperature by cooling water. For the above-mentioned pre-cooling, it is first necessary to determine the starting time of the pre-cooling. As a roll change involving the hot rolling schedule, the rolling quality of the hot-rolled strip can be effectively guaranteed. For this reason, in the organizational process of hot rolling p...

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Abstract

The invention discloses a cooling method for replacing a hot roll, comprising the following steps of: cooling the roll by cooling water before replacing the roll, replacing the roll, naturally cooling the roll in a replacing process, and finally, forcedly cooling the disassembled roll by cooling water; thereby the temperature of the roll can be quickly and effectively cooled into normal temperature. The invention provides a reliable basis for grinding the subsequent roll.

Description

technical field [0001] The present invention relates to a cooling method when replacing hot rolling rolls, more specifically, to a cooling method for replacing hot rolling rolls. Background technique [0002] For hot rolling, since the temperature of the rolled steel strip is relatively high (generally around 1000° C.), corresponding requirements are put forward for the temperature control of the rolls. During the rolling process of general rolls (that is, work rolls), the instantaneous temperature may reach 700-800°C. After a certain period of water cooling (the gap between the rolling strips), the temperature is roughly controlled at about 80°C. In special cases Under normal circumstances, the temperature of the roll may reach about 100°C. Due to the deviation of the strip during the rolling process, the temperature distribution of the rolls presents an irregular temperature distribution. Roll shape; at the same time, affected by the wear during the rolling process, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B27/10
Inventor 荣鸿伟谢捷高志玲
Owner BAOSHAN IRON & STEEL CO LTD