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Rapid strip threading method for cold rolling mill

A rolling mill and strip threading technology, which is applied in metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of potential safety hazards and long strip threading time, so as to reduce strip threading time, improve operation efficiency, and simplify strip threading The effect of the operation

Active Publication Date: 2020-12-29
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the problems existing in the prior art, and provides a method for solving problems such as long threading time and potential safety hazards in the threading process. Potential safety hazards, reducing equipment back-and-forth action time, and improving production efficiency of cold rolling mill fast strip threading method

Method used

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  • Rapid strip threading method for cold rolling mill

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: A kind of cold rolling mill fast threading device, said device comprises 3# looper 0, 6# tension roller 1, 6# tension roller pressure roller 2, 7# tension roller 3, 7# tension roller pressure roller 4. Platen 5, three-roll stabilizer roll 6, F1 rolling mill 7, F2 rolling mill 8, F3 rolling mill 9, F4 rolling mill 10, F5 rolling mill 11 and coiler 12, the 3# looper 0 stores strip steel, located at 6# In front of tension roller 1, 6# tension roller 1, 7# tension roller 4 tension roller group connects 3# looper 0 and F1 mill 7, 6# tension roller 1, 7# tension roller 4 tension roller group pairs looper 0 and F1 provides tension; the function of the platen table 5 is to compress the strip steel during the belt threading process to prevent the position of the strip steel from changing under the tension of the looper; the three-roller stabilizing roller 6 compresses the strip steel during the production process to prevent the strip steel from shaking , Lifted dur...

Embodiment 2

[0033] Embodiment 2: a kind of method for fast threading of cold rolling mill, described method comprises the following steps:

[0034] Step 1) The unit tension between the 3# looper and the 6# and 7# tension rollers is set to 2.0-3.0 (10N / mm 2 );

[0035] Step 2) The roll gap between the upper and lower working rolls of the F1-F5 frame is opened and kept at 8-20mm;

[0036] Step 3) Trim the head of the strip steel into a circular arc shape, and the head of the strip steel is upturned by about 15 degrees;

[0037] Step 4) The upper roll of the three-roller stabilizing roll is lifted, and the pressure plate at the entrance of the rolling mill is pressed down;

[0038] Step 5) Jog 6# and 7# tension roller groups in reverse, jog the deformed strip steel to the bottom of the entrance platen, and use the tension between the platen and the tension roller and the pressure of the platen to flatten the strip steel in the deformed area ;

[0039] Step 6) Open the tension rollers at th...

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Abstract

The invention relates to a rapid strip threading method for a cold rolling mill. The method comprises the following steps of: (1) setting unit tension between a 3# loop and 6# and 7# tension rollers to be 2.0-3.0 (10 N / mm<2>); (2) opening roller gaps between upper and lower working rollers of F1 to F5 racks and keeping the roller gaps at 8-20 mm; (3) trimming the head of strip steel to be arc-shaped, and upwarping the head of the strip steel by about 15 degrees; (4) lifting an upper roller of a three-roller stabilizing roller, and pressing down a pressure plate at an inlet of the rolling mill;(5) reversely inching a 6# tension roller set and a 7# tension roller set, inching the deformed strip steel to a position below the pressure plate at the inlet, and flattening the strip steel in a deformation area by utilizing the tension between the pressure plate and the tension rollers and the pressure of the pressure plate; (6) opening tension compression rollers at outlets of the F1 to F5 racks and lifting a strip threading guide plate table between the racks; and (7) sequentially increasing the speeds of the F1 to F5 racks and the speed of a coiling machine at the outlet of the rollingmill by 2% on the basis that the speeds of the 6# tension roller set and the 7 # tension roller set at the inlet are 20 m / min in the rolling mill section, and starting the rolling mill after strip threading is completed.

Description

technical field [0001] The invention relates to a device, in particular to a method for fast strip threading of a cold rolling mill, and belongs to the technical field of steel rolling process control. Background technique [0002] After the rolling mill of the pickling mill is overhauled and adjusted or the strip is broken, it needs to be threaded again to resume production. According to the normal process, it takes an average of 20 minutes for the threading of the rolling mill to resume production. The first reason is that the shape of the head of the strip is irregular. During the process, in order to keep the tension at the entrance of the rolling mill stable, the three-roll stabilizing rolls at the entrance of the rolling mill were put into use (the insertion amount of the upper roll was 12 cm). After the three-roll stabilizing rolls were put in, the strip would be bent and deformed. Lifting, the bent and deformed area will touch the equipment in the process channel, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B39/02B21B15/00
CPCB21B39/02B21B15/00B21B2015/0057Y02P70/10
Inventor 汤锋涛王金华明伟黄学林
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD