CN108356080B - Pre-swing leveling method for roll gap - Google Patents
Pre-swing leveling method for roll gap Download PDFInfo
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- CN108356080B CN108356080B CN201810105549.5A CN201810105549A CN108356080B CN 108356080 B CN108356080 B CN 108356080B CN 201810105549 A CN201810105549 A CN 201810105549A CN 108356080 B CN108356080 B CN 108356080B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000002436 steel type Substances 0.000 claims abstract description 12
- 238000005096 rolling process Methods 0.000 abstract description 34
- 229910000831 Steel Inorganic materials 0.000 abstract description 24
- 239000010959 steel Substances 0.000 abstract description 24
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000006386 memory function Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
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Abstract
The invention discloses a roll gap pre-swing leveling method, which comprises the steps of operating the same steel type in the same planning period, recording the roll gap value of the steel type leveling operation by an operator through a primary control system, and then overlapping the roll gap value with a secondary issued set roll gap to generate a new waiting roll gap so that the roll gap is in an equivalent parallel state to perform pre-swing leveling of the roll gap. The roll gap pre-swing leveling method provided by the invention is used for producing hot rolled steel plates, so that the rolling stability of a finishing mill set is improved, the phenomena of deviation, strip breakage or scrap steel generation and the like after rolling are controlled and reduced, the product quality and the primary qualified rate are improved, the method is simple, convenient and effective to operate, a rolling model is optimized, and the method has good popularization value.
Description
Technical Field
The invention relates to the technical field of automatic control of metallurgy, in particular to a pre-swing leveling method for a roll gap.
Background
The hot rolling is to take a slab (mainly a continuous casting slab) as a raw material, heat the slab and then make the slab into a strip steel by a rough rolling unit and a finishing rolling unit. The hot steel strip from the last rolling mill of finish rolling is cooled to a set temperature by laminar flow, coiled into a steel strip coil by a coiling machine, and the cooled steel strip coil is processed into steel plate, flat coil and longitudinal cut steel strip products by different finishing operation lines (flattening, straightening, transverse cutting or longitudinal cutting, inspection, weighing, packaging, marking and the like) according to different requirements of users. In a simple point, a billet is heated and then subjected to several rolling passes, edge cutting and straightening to form a steel plate, which is called hot rolling.
In the process of recovering production after shutdown of the hot rolling finishing mill, the leveling of the finishing mill is a key link for initialization of the finishing mill. At present, a finishing mill is pressed and zeroed by 1500 tons of rolling force, the zeroing precision is restricted by various conditions, and the roll gap leveling precision of a roller can not meet the requirement of smooth threading after the finishing mill is pressed and zeroed; in addition, the roll gap pre-swing leveling after the roll change is carried out according to the traditional method, so that the production requirement cannot be met, and the risks of low yield and high rolling waste rate exist; at the moment, when the slab is rolled, accidents such as overlong bad sections at the head of the steel coil, deviation, even steel clamping, steel scrap and the like often occur. Therefore, when the finishing mill starts rolling, an operator needs to manually pre-swing the roll gap of the rolling mill according to experience, and the manual pre-swing leveling still has the defects of insufficient precision, so that the production requirements can not be well met due to the occurrence of accidents such as deviation, steel scrap and the like in the rolling process.
At present, the method for pre-swinging and leveling the roll gap of the finishing mill during the production and the rolling of the finishing mill disclosed by the prior art still has the defect of insufficient precision, and is easy to cause accidents such as deviation, steel scrap and the like in the rolling process; some leveling methods are complex, require numerous devices and software to operate, and are tedious and high in cost. In view of the fact that a method for pre-swinging and leveling a roll gap of a rolling mill needs to be further improved when the finishing mill is in production and is started to roll; accordingly, those skilled in the art have endeavored to develop a roll gap pre-pendular leveling method to ameliorate the above-mentioned deficiencies in the prior art.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to solve the technical problem that when a finishing mill is used for production and rolling, the roll gap pre-swing leveling precision is insufficient, so that accidents such as deviation and steel scrap in the rolling process occur, and the production requirement cannot be well met.
In order to achieve the aim, the invention provides a roll gap pre-swing leveling method, which comprises the steps of operating the same steel type in the same planning period, recording the roll gap value of the leveling operation of the steel type by an operator by a primary control system, and then overlapping the roll gap value with a secondary issued set roll gap to generate a new waiting roll gap so that the roll gap is in an equivalent parallel state to perform pre-swing leveling of the roll gap;
further, the roll gap pre-swing leveling method specifically comprises the following steps;
step 1, adding a leveling operation button;
and 3, performing pre-swing leveling on the roll gap according to the numerical record in the step 2.
Further, in the step 1, the added leveling operation buttons are on an operation table of a finishing mill;
further, in the step 2, the leveling operation roll gap value recording is performed for the same steel type in the same planning period, and the primary control system records the leveling operation roll gap value of the steel type by an operator, and then the leveling operation roll gap value is overlapped with a secondary issued set roll gap to generate a new waiting roll gap;
further, in the step 3, according to the numerical record of the step 2, pre-swing leveling of the roll gap is performed, so that the roll gap is in an equivalent parallel state.
By adopting the scheme, the pre-swing leveling method for the roll gap disclosed by the invention has the following technical effects:
according to the roll gap pre-swing leveling method provided by the invention, the roll gap is automatically memorized as a new value in the leveling process, and the roll gap leveling memory function of the rolling mill is realized, so that the rolling stability of a finishing mill set is greatly improved, the manual leveling operation in the rolling process is reduced, the manual misoperation is effectively prevented, the phenomena of deviation, belt breakage or waste steel generation and the like after rolling are controlled and reduced, and the product quality and the primary qualified rate are improved;
the roll gap pre-swing leveling method provided by the invention has the advantages that the leveling operation is simple, convenient and effective, the rolling rhythm is improved, the production efficiency is greatly improved, and the energy consumption and the production cost are greatly reduced;
by adopting the roll gap pre-swing leveling method provided by the invention to produce the hot rolled steel plate, the labor intensity of operators is reduced, the process standardization operation flow is simplified, the management flow is reduced, the management investment is reduced, the rolling model is optimized, and the roll gap pre-swing leveling method has good popularization value.
In conclusion, the roll gap pre-swing leveling method provided by the invention is used for producing hot rolled steel plates, so that the initial rolling stability of a finishing mill set is improved, the phenomena of deviation, strip breakage or scrap steel generation and the like after initial rolling are controlled and reduced, the product quality and the primary qualified rate are improved, the method is simple, convenient and effective to operate, the rolling model is optimized, and the method has good popularization value.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is an operational schematic diagram of a roll gap pre-swing leveling method according to an embodiment of the present invention;
FIG. 2 is an operational schematic diagram of a roll gap pre-swing leveling method according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for pre-pendular leveling of a roll gap according to an embodiment of the present invention;
FIG. 4 is a graph showing rolling data when a hot rolled steel sheet is manufactured by the roll gap pre-swing leveling method according to the embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings for clarity and understanding of technical contents. The invention may be embodied in many different forms of embodiments and should not be construed as limited to the embodiments set forth herein.
Examples of the following,
The invention discloses a roll gap pre-swing leveling method, which comprises the following steps;
step 1, adding a leveling operation button; according to the operation leveling principle shown in fig. 1, the operation schematic diagram is shown in fig. 2, and the operation is specifically as follows: a leveling button is additionally arranged on an operation platform of the finishing mill to meet the process operation requirements, the leveling operation is to control the deviation or wave shape which has or tends to appear by raising or lowering the deviation of roll gaps on two sides, an operator can manually operate the roll gap to be pressed down or raised from the operation platform, and the roll gap moves 0.01mm each time.
step 3, according to the numerical record of the step 2, pre-swing leveling of the roll gap is carried out, manual leveling operation in the rolling process is reduced, and the roll gap is in an equivalent parallel state;
fig. 3 is a flowchart of a roll gap pre-swing leveling method according to this embodiment.
The roll gap pre-swing leveling method of the embodiment is adopted to produce hot rolled steel plate products, field rolling data is collected to carry out contrastive analysis, as shown in the roll gap leveling numerical value shown in figure 4, after roll gap leveling operation action, the numerical value is stable and basically free of fluctuation, manual leveling operation in the rolling process is favorably reduced, the phenomena of deviation, belt breakage or waste steel generation and the like after rolling caused by manual misoperation are favorably reduced, and the product quality and the first pass percent are favorably improved;
in conclusion, the roll gap pre-swing leveling method provided by the embodiment of the invention obviously reduces the occurrence probability of off tracking, belt breakage or waste steel generation of hot rolled steel plate products after initial rolling, improves the qualified yield of the products, improves the product quality and reduces the energy consumption.
The roll gap pre-swing leveling method in other embodiments of the invention has similar beneficial effects as described above.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (1)
1. A roll gap pre-swing leveling method is characterized by comprising the steps of operating the same steel type in the same planning period, recording the roll gap value of the steel type leveling operation by an operator through a primary control system, and overlapping the roll gap value with a secondary issued set roll gap to generate a new waiting roll gap so that the roll gap is in an equivalent parallel state to perform pre-swing leveling of the roll gap;
the specific operation is as follows:
step 1, adding a leveling operation button;
step 2, carrying out leveling operation roll gap numerical value recording;
step 3, performing pre-swing leveling on the roll gap according to the numerical record in the step 2;
wherein,
in the step 1, the added leveling operation buttons are arranged on an operation table of a finishing mill;
in the step 2, the leveling operation roll gap numerical value recording is performed aiming at the same steel type in the same planning period, and the primary control system records the leveling operation roll gap numerical value of the steel type by an operator and then superposes the leveling operation roll gap numerical value with the secondary issued set roll gap to generate a new waiting position roll gap;
and 3, according to the numerical record in the step 2, pre-swinging and leveling of the roll gap are carried out, so that the roll gap is in an equivalent parallel state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810105549.5A CN108356080B (en) | 2018-02-02 | 2018-02-02 | Pre-swing leveling method for roll gap |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810105549.5A CN108356080B (en) | 2018-02-02 | 2018-02-02 | Pre-swing leveling method for roll gap |
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| CN108356080A CN108356080A (en) | 2018-08-03 |
| CN108356080B true CN108356080B (en) | 2020-06-02 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3701981B2 (en) * | 1998-02-27 | 2005-10-05 | 新日本製鐵株式会社 | Sheet rolling method and sheet rolling machine |
| CN101972779B (en) * | 2010-11-05 | 2012-06-06 | 南京钢铁股份有限公司 | Zero position calibrating and roll gap positioning method for four-roller reversible mill |
| CN103252350B (en) * | 2012-02-17 | 2015-04-01 | 宝山钢铁股份有限公司 | Leveling method for finishing mill after roller changing |
| CN103302102B (en) * | 2013-05-10 | 2015-01-07 | 唐山建龙实业有限公司 | Roll gap leveling method for steel strip finishing mill |
| CN104998911A (en) * | 2014-04-17 | 2015-10-28 | 宝山钢铁股份有限公司 | Roll gap control method for strip steel subjected to finish rolling of hot continuous rolling mill |
| CN105436209B (en) * | 2014-09-28 | 2017-08-25 | 宝山钢铁股份有限公司 | A kind of unilateral method for controlling thickness of heavy and medium plate mill |
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