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Acid washing cold rolling combined unit inlet loop filling speed control method

A combined unit, pickling cold rolling technology, applied in rolling mill control devices, metal rolling, tail end control, etc., can solve problems such as equipment impact, increase the accident rate in the inlet looper area, and affect the normal development of production.

Inactive Publication Date: 2014-08-13
HANGANG GRP HANBAO IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the filling process, the equipment is greatly impacted, which increases the accident rate in the entrance loop area, affects the normal production, and consumes a lot of spare parts

Method used

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  • Acid washing cold rolling combined unit inlet loop filling speed control method
  • Acid washing cold rolling combined unit inlet loop filling speed control method
  • Acid washing cold rolling combined unit inlet loop filling speed control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] For strip steel of L11304771700, the weight is 26.617t, the material thickness is 2.998mm, and the material width is 1.202m, so the material length is l=946m, and x=25% at the beginning of filling, and the full set is y=95%, constant C=572, v-acid=250m / min, brought into the formula to get:

[0036] m / min

[0037] If the maximum speed and 700m / min speed are used to fill the sleeve, the speed of the trolley is m / min

[0038] The filling speed calculated by this formula is m / min

[0039] It is 40.75% of full-speed charging, and the impact on the equipment will be greatly reduced.

[0040] According to the maximum speed of filling, the tracking time of this one roll from filling to flicking to welding machine waiting for welding is: from the beginning of filling to the time of fully filling min, the time it takes from full to the tail swing to the welding machine min, total time min.

[0041] According to the filling speed calculated by this formula, the tot...

Embodiment 2

[0043] L11304771100, the weight is 25.715t, the material thickness is 3.798mm, and the material width is 1.225m, then the material length l=708m, set x=25% at the beginning of filling, set y=95% for the full set, constant C=572, V acid = 240m / min, brought into the formula to get:

[0044] m / min

[0045] If the maximum speed and 700m / min speed are used to fill the sleeve, the speed of the trolley is m / min

[0046] The speed of the trolley calculated by this formula is m / min

[0047] It is 67.9% of the full-speed charging, and the impact on the equipment is greatly reduced.

[0048] It can also be seen that the time from the start of filling to the tail swinging to the welding machine is the same.

Embodiment 3

[0050] L11304771100, the weight is 28.177t, the material thickness is 2.297mm, and the material width is 1.5088m, then the material length l=1042m, set x=25% at the beginning of filling, set the full set amount as y=95%, constant C=572 , v-acid=260m / min, brought into the formula to get:

[0051] m / min

[0052] If the maximum speed and 700 speed are used to fill the case, the speed of the car is m / min

[0053] The speed of the trolley calculated by this formula is m / min

[0054] It is 36.8% of full-speed charging, and the impact on the equipment is greatly reduced.

[0055] It can also be seen that the time from the start of filling to the tail swinging to the welding machine is the same.

[0056]The above examples show that the optimal filling speed is used to fill the sleeve, and the strip filling speed and the running speed of the looper are greatly reduced. Especially when rolling strip steel and high-strength steel with specifications below 3.0, the speed of t...

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Abstract

An acid washing cold rolling combined unit inlet loop filling speed control method belongs to the technical field of cold rolling production line speed control and is used for controlling the loop filling speed. A loop filling speed formula is shown in the description, v is the loop instantaneous optimum loop filling speed, v is the acid washing process section main speed, x is the loop filling quality percentage at the beginning of the loop filling, y is the loop filling full quantity percentage, and C is a constant. Loop filling is conducted by adopting the optimum loop filling speed, and the belt loop filling speed and the loop vehicle operation speed are greatly reduced. Especially when belt steel and high strength steel with the specification lower than 3.0 are rolled, the loop vehicle speed is reduced by over 50%, and stable operation of loops is not endangered. Due to the fact that the whole loop filling process tends to be mild, accidents like belt steel off tracking and breaking are avoided in production thin belt steel. The method has remarkable innovativeness, advancement and economical benefit and can be popularized and applied in acid washing cold rolling combined units.

Description

technical field [0001] The invention relates to a method for controlling the filling speed of a horizontal inlet looper of a combined pickling and cold-rolling unit, and belongs to the technical field of speed control of a cold-rolling production line. Background technique [0002] In the production process of the pickling and cold-rolling combined unit, after each strip is uncoiled on the line, its strip head must be welded to the strip tail of the previous strip, and then the strip is filled into the inlet looper at a certain speed In the middle, after the filling is completed, the next roll of strip steel is welded with the tail of the strip steel roll. At present, in the process of filling the inlet loop of the combined pickling and cold rolling unit, it is generally used to quickly fill the loop at a constant speed. The speed of the section is consistent until the coil of strip steel is completely filled into the inlet looper. Such a filling process leads to a very hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/72B21B37/00B21B41/00
Inventor 张维召周建军郭文涛安亮耿波王树友张斌潜伟李连胜
Owner HANGANG GRP HANBAO IRON & STEEL
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