CN103240280A - Hot-rolled steel strip vertical stripe defect eliminating method - Google Patents
Hot-rolled steel strip vertical stripe defect eliminating method Download PDFInfo
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- CN103240280A CN103240280A CN2013101567113A CN201310156711A CN103240280A CN 103240280 A CN103240280 A CN 103240280A CN 2013101567113 A CN2013101567113 A CN 2013101567113A CN 201310156711 A CN201310156711 A CN 201310156711A CN 103240280 A CN103240280 A CN 103240280A
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Abstract
The invention discloses a hot-rolled steel strip vertical stripe defect eliminating method. The method includes reducing the rotary speed of a grinding wheel, increasing the rotary speed of a roller during the process of rough grinding and fine grinding, reducing the rotary speed of the roller during the process of first half fine grinding, reducing the rotary speed of the roller during the processes of second half fine grinding and third half fine grinding, reducing the speed of a layer board, and reducing the contact pressure of the grinding wheel and the roller face and increasing the number of fine grinding passes. By the method, impression traces on a working roller of F4-F6 in the grinding process can be eliminated completely, and good effect can be achieved. Meanwhile, the curve radius difference of a finishing mill group end frame working roller of CVC (continuous variable crown) type is controlled in a range less than or equal to 0.75mm (0.625mm is selectable), and high grinding efficiency is improved. The hot-rolled steel strip vertical stripe defect eliminating method has the advantages of convenience in operation, significance in effect and high accuracy, and qualified raw materials are provided for producing cold rolling products, namely automobile plates, house appliance plates and the like, with high-level surface quality requirements.
Description
Technical field
The invention belongs to technical field of steel rolling, particularly a kind of method of eliminating hot-strip longitudinal stripe defective.
Background technology
05 surface rolling plate mainly is used on the large-area external member, as positions such as the roof of sedan limousine, car door, car bonnet, wing, back gussets.
So-called " 05 surface " is the given a kind of sign of the flat cold-rolled sheet surface quality of Deutsche industry norm (DIN) DIN1623-I.It requires the front of plate must zero defect, and having does not influence it and be coated with knee or electroplate the uniform outward appearance of back high-quality.Concrete quality requirement is, as being used as body shell (for 4 cars), do not allow to exist following defective on good of the steel plate of polishing without oilstone: sliding injury, the marking, oxide skin pit, scratch, annealing limit, smooth flower and athwart sea etc. are damaged, batched in slight crack, corrosion (comprising a rust), emulsion spot, bonding, limit portion.For as roof, door, luggage-boot lid etc., except can not the unallowed defective of body shell, also should not exist sealing to scab at good, and steel plate do not show above-mentioned defective yet after the oilstone polishing, as impression and athwart sea etc.
05 Automobile Plate customer requirements surface quality zero-fault, yet the longitudinal stripe problem is that (western mark provided in 2008 from moving steel one hot rolling replacing precision rolling working roll CVC roll shape, began in 2009 to use) the back appearance, almost move all rolling coil of strips of steel one hot rolling longitudinal stripe is all arranged, influence presentation quality, test tracking results simultaneously and show that cold-rolled process can not eliminate, have influence on the surface quality of follow-up finished product, can not satisfy the surface quality requirement of 05 Automobile Plate.Done some grinding tests though promote hot rolling, effect is all not good.
Chill after cold rolling twisted in the rewinding inspection of polishing, find that belt steel surface still has along rolling to the longitudinal stripe that distributes.Find during follow-up investigations, after the hot rolled coil pickling, cold rolling before, the surface namely is distributed with " longitudinal stripe " that spacing is the 20mm rule.The problem cause investigation has been carried out in the hot rolling aspect, finds that the emery wheel impression mark that exists on the mm finishing mill unit working roll is the reason that causes this kind problem.
Follow the tracks of hot rolling scaduled moving steel, rolling before, the emery wheel seal of breaker roll has carried out distance measurement, rolling after, coil of strip has been carried out the uncoiling inspection, also measured fringe spacing.Fringe spacing on the steel plate and the emery wheel of roll seal spacing fit like a glove, and spacing also is 20mm.
Referring to Fig. 2, the roll shape employing semidiameter of milling train end breast roller is the CVC roll shape of 1mm in the prior art, and the grinding process parameters of employing is as follows:
| Parameter | Corase grind | The first half correct grindings | The second half correct grindings | The 3 half correct grinding | Correct grinding | Correct grinding |
| Grinding wheel speed, m/s | 38 | 38 | 38 | 38 | 38 | 38 |
| Roll rotational speed, rpm | 40 | 45 | 45 | 45 | 60 | 60 |
| Planker speed, mm/min | 3800 | 3600 | 3500 | 2800 | 1800 | 1300 |
| Continue the amount of feeding, mm/min | 0.2 | 0.05 | 0.02 | 0.01 | 0 | 0 |
| Amount of feeding increment, mm | 0.02 | 0.01 | 0.005 | 0.005 | 0 | 0 |
| Contact pressure, % | 40 | 11 | 11 | 11 | 9 | 5 |
| The road sub-quantity | 3 | 2 | 1 | 1 | 1 | 1 |
After the grinding, emery wheel seal spacing is 20mm.
In sum, the longitudinal stripe defective is common in cold rolling Ultra-low carbon steel grade, and defective generally vertically distributes along steel plate, and striped is logical and rolls out now, and is distributed in whole plate width direction; Striped is light and dark, and the light and shade boundary is obvious, and contrast of fringes normal substrate in where there is light is white partially, and width of fringe is generally between 5-20mm.As a kind of cold rolling common deficiency, cold-reduced sheet surface longitudinal striped is the main cause that causes cold-reduced sheet top grade rate to reduce.This defective makes surface of steel plate aberration occur, causes the bad direct use that influences lower procedure production and user of follow-up coating effect; In addition, this defective also can be accelerated steel plate corrosion, causes the wasting of resources and material security to reduce.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method of eliminating hot-strip longitudinal stripe defective, when can realize eliminating on the working roll abrasive grinding wheel impression mark, guarantees roll dressing efficient.
For solving the problems of the technologies described above, the invention provides a kind of method of eliminating hot-strip longitudinal stripe defective, comprising:
Grinding process parameters is set, is specially and reduces grinding wheel speed, increase corase grind and correct grinding stage roll rotational speed, reduce by the first half correct grinding stage roll rotational speeds, increase by the second half correct grinding and the 3 half correct grinding stage roll rotational speeds, reduce supporting plate speed, reduce emery wheel and contact pressure with roll surface and increase emery wheel impression mark on the correct grinding road sub-quantity realization elimination working roll;
By mm finishing mill unit end frame working roll CVC roller curve semidiameter is controlled in the 0-0.75mm scope, realize improving grinding efficiency.
A kind of method of eliminating hot-strip longitudinal stripe defective provided by the invention, by increasing roll rotational speed, reduce grinding wheel speed, reduce planker speed, reducing that emery wheel contact pressure with roll surface and passage is finish grinded in increase, can thoroughly eliminate the emery wheel impression mark on F4 in the grinding process～F6 working roll, reach good effect.Simultaneously, by mm finishing mill unit end frame working roll CVC roller curve is controlled in the 0-0.75mm scope (optional 0.625mm), realized the raising grinding efficiency.And characteristics easy and simple to handle, that effect is remarkable, accuracy is high that the present invention also has provide qualified raw material for producing cold-rolled products such as Automobile Plate that high-grade surface quality requires and tame electroplax.
Description of drawings
A kind of method theory diagram of eliminating hot-strip longitudinal stripe defective that Fig. 1 provides for the embodiment of the invention.
Fig. 2 is the CVC roller curve of 1mm for the roll shape of milling train end breast roller in the prior art adopts semidiameter.
To adopt semidiameter be the CVC roller curve of 0.625mm to the roll shape of milling train end breast roller in a kind of method of eliminating hot-strip longitudinal stripe defective that Fig. 3 provides for the embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment provided by the invention is described in further detail.
Referring to Fig. 1, a kind of method of eliminating hot-strip longitudinal stripe defective that the embodiment of the invention provides comprises:
1., grinding process parameters is set:
；
By reducing grinding wheel speed, increase corase grind and correct grinding stage roll rotational speed, reduce by the first half correct grinding stage roll rotational speeds, increase by the second half correct grinding and the 3 half correct grinding stage roll rotational speeds, reduce supporting plate speed, reducing emery wheel and contact pressure with roll surface and increase emery wheel impression mark on the correct grinding road sub-quantity realization elimination working roll;
2., by mm finishing mill unit end frame working roll CVC roller curve semidiameter is arranged in the scope of 0-0.75mm realization raising grinding efficiency.
In the present embodiment, preferably, the concrete setting value of grinding process parameters is:
| Parameter | Corase grind | The first half correct grindings | The second half correct grindings | The 3 half correct grinding | Correct grinding | Correct grinding |
| Grinding wheel speed, m/s | 35 | 35 | 35 | 30 | 30 | 30 |
| Roll rotational speed, rpm | 45 | 40 | 50 | 55 | 65 | 65 |
| Planker speed, mm/min | 3500 | 3500 | 2500 | 1500 | 800 | 400 |
| Continue the amount of feeding, mm/min | 0.2 | 0.05 | 0.02 | 0.01 | 0 | 0 |
| Amount of feeding increment, mm | 0.02 | 0.01 | 0.005 | 0.005 | 0 | 0 |
| Contact pressure, % | 20～40 | 10 | 10 | 10 | 8 | 4 |
| The road sub-quantity | 4 | 4 | 3 | 2 | 2 | 2 |
；
In the present embodiment, preferably, the roller curve semidiameter is 0.625mm.
A kind of method of eliminating hot-strip longitudinal stripe defective that present embodiment provides, in actual application, by reducing grinding wheel speed, increase corase grind and correct grinding stage roll rotational speed, reduce by the first half correct grinding stage roll rotational speeds, increase by the second half correct grinding and the 3 half correct grinding stage roll rotational speeds, reduce supporting plate speed, reducing that emery wheel contact pressure with roll surface and the road sub-quantity is finish grinded in increase, can thoroughly eliminate the emery wheel impression mark on F4 in the grinding process～F6 working roll, reach good effect.Simultaneously, since in the grinding process according to above-mentioned test parameters adjustment, then increased the grinding time, adopted above-mentioned test grinding parameter, roll of grinding needs about 60 minutes, (existing technological parameter, roll of grinding needs 28～30 minutes), therefore, the present invention also by three CVC roller curves of mm finishing mill unit end frame working roll semidiameter is arranged on≤scope of 0.75mm in (optional 0.625mm), realize improving grinding efficiency.
A kind of method of eliminating hot-strip longitudinal stripe defective that present embodiment provides, optimize roll shape and optimize the mode that grinding process parameters combines by adopting, eliminated abrasive grinding wheel impression mark on the working roll, the longitudinal stripe defective that the broad hot strip surface takes place has been carried out thorough radical cure, when can realize thoroughly solving hot-strip surface longitudinal strip flaw problem, guarantee roll dressing efficient.Characteristics easy and simple to handle, that effect is remarkable, accuracy is high that the embodiment of the invention also has provide qualified raw material for producing cold-rolled products such as Automobile Plate that high-grade surface quality requires and tame electroplax.
It should be noted last that, the above specific embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to example the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. a method of eliminating hot-strip longitudinal stripe defective is characterized in that, comprising:
Grinding process parameters is set:
；
By reducing grinding wheel speed, increase corase grind and correct grinding stage roll rotational speed, reduce by the first half correct grinding stage roll rotational speeds, increase by the second half correct grinding and the 3 half correct grinding stage roll rotational speeds, reduce supporting plate speed, reducing emery wheel and contact pressure with roll surface and increase emery wheel impression mark on the correct grinding road sub-quantity realization elimination working roll;
By mm finishing mill unit end frame working roll CVC roller curve semidiameter is arranged in the 0-0.75mm scope, realize improving grinding efficiency.
2. according to the described a kind of method of eliminating hot-strip longitudinal stripe defective of claim 1, it is characterized in that the concrete setting value of described grinding process parameters is:
。
3. according to the described a kind of method of eliminating hot-strip longitudinal stripe defective of claim 1, it is characterized in that:
Described roller curve semidiameter is 0.625mm.
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| CN201310156711.3A CN103240280B (en) | 2013-04-28 | 2013-04-28 | Hot-rolled steel strip vertical stripe defect eliminating method |
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| CN201310156711.3A CN103240280B (en) | 2013-04-28 | 2013-04-28 | Hot-rolled steel strip vertical stripe defect eliminating method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801567A (en) * | 2014-02-10 | 2014-05-21 | 山西太钢不锈钢股份有限公司 | Method for eliminating cold-strip steel ribbed strips |
| CN105215791A (en) * | 2014-06-27 | 2016-01-06 | 张红超 | Minute surface Roller Machining method and utilize the method for this minute surface Roller Machining minute surface aluminium sheet |
| CN108788941A (en) * | 2018-07-06 | 2018-11-13 | 攀钢集团西昌钢钒有限公司 | A kind of method for grinding of CVC rolls |
| CN110340149A (en) * | 2019-07-19 | 2019-10-18 | 首钢京唐钢铁联合有限责任公司 | Roll and its method for grinding |
| CN111660151A (en) * | 2020-05-12 | 2020-09-15 | 首钢集团有限公司 | Production method and device of galvanized steel sheet |
| CN113500098A (en) * | 2021-08-20 | 2021-10-15 | 山西太钢不锈钢股份有限公司 | Method for eliminating rolling chromatic aberration of ultrapure ferrite stainless steel by five-rack six-roller continuous rolling mill |
| CN114986260A (en) * | 2022-05-27 | 2022-09-02 | 湖南华菱涟源钢铁有限公司 | Method for grinding roller and mirror roller |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07265913A (en) * | 1991-08-23 | 1995-10-17 | Sumitomo Metal Ind Ltd | Roll for rolling, grinding method therefor and metal sheet rolling method |
| JPH07265912A (en) * | 1991-08-20 | 1995-10-17 | Sumitomo Metal Ind Ltd | Roll for rolling, grinding method therefor and metal sheet rolling method |
| JPH0857755A (en) * | 1994-08-23 | 1996-03-05 | Sumitomo Metal Ind Ltd | Rolling roller surface polishing method |
| CN101417403A (en) * | 2008-12-03 | 2009-04-29 | 宝钢集团常州轧辊制造公司 | Method for grinding and processing Sendzimer roller |
| CN101417342A (en) * | 2008-12-03 | 2009-04-29 | 宝钢集团常州轧辊制造公司 | High-hardness roller processing method |
| CN102581712A (en) * | 2012-03-27 | 2012-07-18 | 首钢总公司 | Method for grinding plain roll from plain profile into CVC (continuous variable crown) profile |
-
2013
- 2013-04-28 CN CN201310156711.3A patent/CN103240280B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07265912A (en) * | 1991-08-20 | 1995-10-17 | Sumitomo Metal Ind Ltd | Roll for rolling, grinding method therefor and metal sheet rolling method |
| JPH07265913A (en) * | 1991-08-23 | 1995-10-17 | Sumitomo Metal Ind Ltd | Roll for rolling, grinding method therefor and metal sheet rolling method |
| JPH0857755A (en) * | 1994-08-23 | 1996-03-05 | Sumitomo Metal Ind Ltd | Rolling roller surface polishing method |
| CN101417403A (en) * | 2008-12-03 | 2009-04-29 | 宝钢集团常州轧辊制造公司 | Method for grinding and processing Sendzimer roller |
| CN101417342A (en) * | 2008-12-03 | 2009-04-29 | 宝钢集团常州轧辊制造公司 | High-hardness roller processing method |
| CN102581712A (en) * | 2012-03-27 | 2012-07-18 | 首钢总公司 | Method for grinding plain roll from plain profile into CVC (continuous variable crown) profile |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801567A (en) * | 2014-02-10 | 2014-05-21 | 山西太钢不锈钢股份有限公司 | Method for eliminating cold-strip steel ribbed strips |
| CN105215791A (en) * | 2014-06-27 | 2016-01-06 | 张红超 | Minute surface Roller Machining method and utilize the method for this minute surface Roller Machining minute surface aluminium sheet |
| CN108788941A (en) * | 2018-07-06 | 2018-11-13 | 攀钢集团西昌钢钒有限公司 | A kind of method for grinding of CVC rolls |
| CN110340149A (en) * | 2019-07-19 | 2019-10-18 | 首钢京唐钢铁联合有限责任公司 | Roll and its method for grinding |
| CN110340149B (en) * | 2019-07-19 | 2021-01-26 | 首钢京唐钢铁联合有限责任公司 | Method for grinding a roll |
| CN111660151A (en) * | 2020-05-12 | 2020-09-15 | 首钢集团有限公司 | Production method and device of galvanized steel sheet |
| CN113500098A (en) * | 2021-08-20 | 2021-10-15 | 山西太钢不锈钢股份有限公司 | Method for eliminating rolling chromatic aberration of ultrapure ferrite stainless steel by five-rack six-roller continuous rolling mill |
| CN114986260A (en) * | 2022-05-27 | 2022-09-02 | 湖南华菱涟源钢铁有限公司 | Method for grinding roller and mirror roller |
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| CN103240280B (en) | 2015-03-25 |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |
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