CN107695109B - Skin pass mill group milling method - Google Patents
Skin pass mill group milling method Download PDFInfo
- Publication number
- CN107695109B CN107695109B CN201710833931.3A CN201710833931A CN107695109B CN 107695109 B CN107695109 B CN 107695109B CN 201710833931 A CN201710833931 A CN 201710833931A CN 107695109 B CN107695109 B CN 107695109B
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- China
- Prior art keywords
- roll
- force
- stage
- unit speed
- skin pass
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/56—Elongation control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/12—Rolling load or rolling pressure; roll force
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The present invention relates to rolling mill practice fields, especially a kind of stability for improving roll-force, realize the automatic switchover between control model, to which product quality be greatly improved and reduce the remaining skin pass mill group milling method of surfacing liquid of product, the following steps are included: a, first stage roll initial stage: unit speed 0~400m/min of range is rolled using permanent roll-force；B, second stage rolls mid-term stage: unit speed range is greater than or equal to 400m/min, using elongation control mode；C, the phase III rolls ending phase: unit speed is being less than 400m/min, is rolled using permanent roll-force.The present invention then overcomes the switching problem of Traditional control mode well, and finally realizes the stably and controllable conversion in the entire operation of rolling between control model, and production efficiency is greatly improved.Present invention is particularly suitable for the production occasions that skin pass mill group is representative.
Description
Technical field
The present invention relates to rolling mill practice field, especially a kind of skin pass mill group milling method.
Background technique
It is existing the whole series skin pass mill group rolling model program cover elongation control mode, Constant dvaught pressure control mode,
Gap preset mode, tilt control mode, roller control model.These types control program is all in the entire operation of rolling at present
Relatively independent control model, between switching need manually to carry out, the switching mode of this control model is to function
Optimization forms biggish difficulty, and the process for allowing to carry out function optimization becomes complicated and cumbersome.
Original roll control can only select elongation control mode, Constant dvaught pressure control mode, roller when starting rolling
The one of which in control model is stitched, the switching of control model cannot be carried out stage by stage in the entire operation of rolling, because of switching
Control model will greatly affect the fluctuation of roll-force, cause product quality problem；So this function is necessary during realizing
Guarantee that the program of design will reach smoothly transitting for roll-force, this is required will be so that entire programming becomes risk very
Greatly, in the design process details design must extreme care, to accomplish calculate it is accurate and switching in roll-force it is smooth, protect
Card product quality in the automatic switchover of rolling mode can be stablized.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of stability for improving roll-force, realize between control model
Automatic switchover, thus be greatly improved product quality and reduce product the remaining skin pass mill group milling method of surfacing liquid.
The technical solution adopted by the present invention to solve the technical problems is: skin pass mill group milling method, comprising the following steps:
A, the first stage rolls initial stage: unit speed 0~400m/min of range is rolled using permanent roll-force
System, wherein the setting value of roll-force is set according to steel grade and thickness specification；
B, second stage rolls mid-term stage: unit speed range is greater than or equal to 400m/min, using elongation percentage control
Molding formula, wherein the setting value of roll-force according to it is actually detected to elongation percentage set；
C, the phase III rolls ending phase: unit speed is being less than 400m/min, is rolled using permanent roll-force,
Wherein, the setting value of roll-force is set according to the average practical roll-force in elongation control stage.
Further, steel grade and thickness specification are called automatically according to procedural model in step a.
The beneficial effects of the present invention are: being all relatively independent control in the entire operation of rolling between traditional control program
Molding formula, between switching need manually to carry out.The present invention then overcomes the switching problem of Traditional control mode well,
In actual use, according to the Constant dvaught pressure control of first stage to the switching of second stage elongation control, so that compensation is cut
Bring roll-force fluctuating error when changing；According to second stage elongation control to the switching of phase III Constant dvaught pressure control,
Smoothly transitting for two kinds of control mode switchs is realized, the risk that roll-force fluctuation bring product quality reduces is reduced.And
The stably and controllable conversion in the entire operation of rolling between control model is finally realized, production efficiency is greatly improved.This
Invention is particularly suitable for the production occasion that skin pass mill group is representative.
Specific embodiment
Skin pass mill group milling method, comprising the following steps: a, first stage roll initial stage: unit speed range 0
~400m/min is rolled using permanent roll-force, wherein the setting value of roll-force is set according to steel grade and thickness specification
It is fixed；B, second stage rolls mid-term stage: unit speed range is greater than or equal to 400m/min, using elongation control mould
Formula, wherein the setting value of roll-force according to it is actually detected to elongation percentage set；C, the phase III, which rolls, terminates rank
Section: unit speed is being less than 400m/min, is rolled using permanent roll-force, wherein the setting value of roll-force is according to elongation percentage
The average practical roll-force in control stage is set.In actual production, it is generally preferable to steel grade and thickness specification in step a
It is called automatically according to procedural model.
For in traditional rolling mill practice, several control programs are all relatively independent control mould in the entire operation of rolling
Formula, between switching need manually to carry out, the switching mode of control model forms biggish difficulty to the optimization of function,
The process for allowing to carry out function optimization becomes complicated and cumbersome technical problem.The present invention has carried out following technology structure first
Think: firstly, the Constant dvaught pressure control for making roll-force reference value for the first stage according to the objective function of optimization technique；Its
It is secondary, the automatic gating module program architecture of two groups of roll-force reference values of first stage offer is provided；Then, according to optimization work
The objective function of skill makes the starting opportunity of elongation control, i.e. second stage, that is, how much opens when unit speed reaches
The investment that begins elongation control；Finally, carrying out the rolling of the reduction of speed rolling of decline product after designing elongation control
Power reference value operation program, i.e. phase III are transferred to Constant dvaught pressure control after elongation control cutting automatically again.In addition,
The operation of phase III and first stage have very big difference.First stage is directly given with reference to rolling according to steel grade and thickness
Power；Phase III then carries out calculating roll-force reference value according to the average practical roll-force in elongation control stage, makes its holding
It is horizontal in a relatively accurate roll-force, improve the quality stability of tail portion product.
The present invention overcomes the switching problem of Traditional control mode, in reality on the basis of above-mentioned technical concept well
In use, according to the Constant dvaught pressure control of first stage to the switching of second stage elongation control, to compensate band when switching
The roll-force fluctuating error come；According to second stage elongation control to the switching of phase III Constant dvaught pressure control, realize
Two kinds of control mode switchs smoothly transit, and reduce the risk that roll-force fluctuation bring product quality reduces.And it is final real
The stably and controllable conversion in the entire operation of rolling between control model is showed, production efficiency is greatly improved.The present invention is outstanding
It is suitable for the production occasions that skin pass mill group is representative, have a vast market promotion prospect.
Claims (2)
1. skin pass mill group milling method, which comprises the following steps:
A, the first stage rolls initial stage: unit speed 0~400m/min of range is rolled using permanent roll-force,
In, the setting value of roll-force is set according to steel grade and thickness specification；
B, second stage rolls mid-term stage: unit speed range is greater than or equal to 400m/min, using elongation control mould
Formula, wherein the setting value of roll-force according to it is actually detected to elongation percentage set；
C, the phase III rolls ending phase: unit speed is being less than 400m/min, is rolled using permanent roll-force,
In, the setting value of roll-force is set according to the average practical roll-force in elongation control stage.
2. skin pass mill group milling method as described in claim 1, it is characterised in that: in step a, steel grade and thickness specification foundation
Procedural model calls automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710833931.3A CN107695109B (en) | 2017-09-15 | 2017-09-15 | Skin pass mill group milling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710833931.3A CN107695109B (en) | 2017-09-15 | 2017-09-15 | Skin pass mill group milling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107695109A CN107695109A (en) | 2018-02-16 |
| CN107695109B true CN107695109B (en) | 2019-10-11 |
Family
ID=61172663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710833931.3A Active CN107695109B (en) | 2017-09-15 | 2017-09-15 | Skin pass mill group milling method |
Country Status (1)
| Country | Link |
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| CN (1) | CN107695109B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100880575B1 (en) * | 2002-08-29 | 2009-01-30 | 재단법인 포항산업과학연구원 | Method for setting up the rolling load to acquire the constant elongation percentage in the skin pass mill, apparatus thereof |
| CN100438998C (en) * | 2005-03-28 | 2008-12-03 | 宝山钢铁股份有限公司 | Extension coefficient and plate shape integrated control method in steel strip flattening process |
| US8365563B2 (en) * | 2009-11-16 | 2013-02-05 | Quad Engineering, Inc. | Methods for reducing ridge buckles and annealing stickers in cold rolled strip and ridge-flattening skin pass mill |
| CN103866214B (en) * | 2014-03-05 | 2016-03-30 | 首钢总公司 | A kind of smooth optimization method for eliminating edge break print |
| CN104324950B (en) * | 2014-08-22 | 2017-11-17 | 攀钢集团攀枝花钢钒有限公司 | A kind of rolling system and its method |
| CN106269861B (en) * | 2016-08-26 | 2019-02-01 | 首钢京唐钢铁联合有限责任公司 | Process method for flattening cold-rolled galvanized strip steel by utilizing flattening machine |
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- 2017-09-15 CN CN201710833931.3A patent/CN107695109B/en active Active
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| CN107695109A (en) | 2018-02-16 |
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