CN102458702A - Descaler for variable thickness metal - Google Patents
Descaler for variable thickness metal Download PDFInfo
- Publication number
- CN102458702A CN102458702A CN2010800269696A CN201080026969A CN102458702A CN 102458702 A CN102458702 A CN 102458702A CN 2010800269696 A CN2010800269696 A CN 2010800269696A CN 201080026969 A CN201080026969 A CN 201080026969A CN 102458702 A CN102458702 A CN 102458702A
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- China
- Prior art keywords
- nozzle
- metal
- array
- distance
- header
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002184 metal Substances 0.000 title claims abstract description 52
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 238000004140 cleaning Methods 0.000 claims description 11
- 238000003491 array Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 abstract description 15
- 238000005192 partition Methods 0.000 description 24
- 239000000463 material Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 208000004350 Strabismus Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000479 mixture part Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Nozzles (AREA)
- Metal Rolling (AREA)
Abstract
Apparatus for descaling metal in plate mills, particularly metal ingots of varying thickness. Two headers (1,2) bearing spray nozzles (17) are arranged above the metal with a mutual offset such that the sprays from the first header (1) are centered on different regions of the metal than are the sprays on the second header (2). The regions sprayed by the first header (1) overlap with those sprayed by the second header (2), the degree of overlap depending on the metal thickness and hence stand off distance of the nozzles.
Description
Technical field
The present invention relates to before rolling, sheet metal and blank carried out scale removal.
Background technology
Generally speaking, mangle has scaler system, and this scaler system is used for before rolled plate, getting on except that incrustation from sheet material, and is to utilize the high pressure water jets love dart to carry out this scale removal in the modern milling train of majority.
Fig. 1 shows a kind of cross section of typical modern scaler.This scaler comprises header 3 and 4 at the bottom of two top headers 1 and 2 and two.For scale removal, roller 5 is carried sheet material along arrow 6 indicated directions, thereby makes sheet material pass scaler.As shown in Figure 1, although many scalers have two groups of headers, generally once only use one group (i.e. header at the bottom of top header and), and another group keeps as subsequent use group.It is quite common that the nozzle that blocks is carried out scale removal, and if nozzle blockage taken place, then milling train switches to subsequent use group of header, up to convenient when the nozzle that blocks is safeguarded till.
Fig. 2 shows in the top header 1,2.High pressure scale removal water (being generally about 180 crust or bigger pressure) gets into header 1 through the pipeline at (in this design) 9 places, two ends.Scale removal injector 8 with this high pressure water jets to sheet material.
In order suitably scale removal to be carried out on the surface of sheet material, importantly to let the impact pressure of the water on the plate surface enough high with water under high pressure.In order to realize this scaler system, as shown in Figure 3, use so-called " flat fan " formula nozzle.These nozzles produce fan jet, and this injection stream is very narrow in a plane, and has fan shape (angle [alpha] among Fig. 3) on another plane.
In order to reach the required enough impact pressures of good scale removal, the parameter that the designer can change comprises:
Supply pressure
Jet size/nozzle angle α/flow velocity.For given jet size, flow velocity is directly proportional with the square root of supply pressure, and therefore for given jet size and supply pressure, flow velocity in fact also has been set.
" separate " distance (h2 among Fig. 3).Partition distance is short more, and impact pressure is big more, but needs more nozzle to cover the whole width of sheet material.
Other important parameter comprises the inclination angle (β among Fig. 3) and the deviation angle γ of nozzle and vertical curve.The inclination angle guarantees not disturb direct injection stream from the water under high pressure and the incrustation of the surface bounce-back of sheet material, and deviation angle guarantees that adjacent injection stream can not interfere with each other simultaneously.Generally speaking, for given partition distance h2, the interval between the selection nozzle E is to have little overlapping D between adjacent nozzles.Even the setting of the header height of this little corresponding sheet metal thickness of overlapping assurance is wrong slightly, also can carry out scale removal to the whole surface of sheet material.The quantity that the total flow of header obviously equals nozzle multiply by the flow of each nozzle.
Obviously can know that from Fig. 3 during the operation scaler, actual partition distance h2 must be near the design load of h2.Can be ineffective equally if actual partition distance, then can reduce the impact pressure and the scale removal of injection stream greater than design load.If actual partition distance is significantly less than design load, then injection stream will be no longer overlapping, will stay the incrustation striped on the sheet material.
Most mangles use various sheet metal thicknesses, therefore can utilize screw jack, hydraulic cylinder or other transmission device to regulate the height of top header usually.Before specific sheet material got into scaler, the control system set correct header height for this sheet material, thereby regardless of sheet metal thickness, partition distance h2 is similar to identical.Obviously, because the lower surface of sheet material always is in same position (on roller 5), therefore need not move end header.
In recent years, utilize blank rather than continuous casting sheet material to produce very thick plate and become a kind of trend.
The existing design of scaler can go wrong when it is used to blank.As shown in Figure 4, blank 10 has trapezoidal shape.For big blank, the thin end of blank and the thickness difference between the thicker end can reach about 80mm or bigger.Because the partition distance h2 on typical scaler is about 150mm, therefore use the header of the traditional scaler that is set at level altitude suitably not carry out scale removal to the whole length of blank.If for the thick end of blank is correctly set the header height, then the impact pressure to thin end is low excessively, can not carry out good scale removal.If the thin end that is blank is set the header height, then injection stream can be suitably not overlapping at thick end, will stay the incrustation striped.
A kind of scheme of head it off is along the height of the length adjustment header of blank when blank passes scaler.Yet, in fact, this quite difficult realization.At first, for moving of synchronous header, in scaler, accurately following the trail of blank is exactly a problem.Secondly, be difficult to enough move header soon.Generally carry out scale removal with the speed of about 1m/sec, therefore whole process only spends the time of several seconds kinds.In order in the so short time, to make header move 80mm, need carry out moving very fast.Another problem is for the design of some scalers, because they use the telescopic feeding unit that when applying pressure, pins, therefore when opening scale removal stream, can not move header.
Another scheme of head it off is to make blank itself can promote the top header and rise to correct height.Existing design has baffle 11 usually, and baffle 11 prevents sheet material or blank collision nozzle when the header height setting is incorrect.Can design these baffles by following mode, that is, in case reach minimum partition distance, blank just upwards promotes baffle and top header.The problem of this scheme is owing to baffle will contact with all blanks, and possibly contact with many sheet materials, so the baffle wearing and tearing to be very fast.
Summary of the invention
The objective of the invention is to, along the whole length of blank this blank is carried out scale removal, and can not produce the problem of discussing in the prior art.
According to a first aspect of the invention, the metal descaling equipment comprises the characteristic of statement in this paper accompanying claims 1.
Although nozzle has a lot of possible arrangements in principle, can it be linear array (or claiming linear array) with arrangement of nozzles easily.More expediently, with this arranged in arrays for the datum line quadrature of the moving direction that is parallel to metal, and in a concrete preferred embodiment, nozzle is equidistantly spaced apart along array.
The method of according to a second aspect of the invention, metal being carried out scale removal is included in the characteristic of statement in this paper accompanying claims 5.
In a kind of method for optimizing according to the present invention, under the situation that adopts at least one array scale removal, the substantially invariable sheet metal of thickness passes under array.A said array is disposed in metal top and metal at a distance of enough distance, so that the cleaning mixture part is sprayed on the metal surface overlappingly.
In another preferred embodiment, according to the present invention, under the situation that adopts two array scale removal, the substantially invariable sheet metal of thickness passes under array.Said array is arranged to the metal surface that guarantees apart from each distance of datum line and is covered by the injection stream from least one nozzle.
In another preferred embodiment, when the sheet metal of varied in thickness passed under nozzle, the guiding cleaning mixture was through the nozzle in two arrays.Said array is disposed in said metal top and said metal at a distance of certain distance; Guarantee thus on the metal surface in the thinnest zone of said metal, to overlap, and guarantee all to be covered by injection stream from least one nozzle in each distance of the said datum line of the thickest regional metal surface distance of said metal from the cleaning mixture injection stream of an array.
Description of drawings
To through nonrestrictive example the present invention be described with reference to following accompanying drawing now, in the accompanying drawing:
Fig. 1 shows a kind of cross section of typical modern scaler;
Fig. 2 shows a top header among Fig. 1;
Fig. 3 shows " flat fan " formula nozzle that is usually used in metal is carried out scale removal in the mangle in modern times;
Fig. 4 shows the trapezoidal metal stock of the typical convergent that uses in the modern plate mills;
Fig. 5 show the standard partition distance place of 150mm according to one ejection pattern in the header of the present invention;
Fig. 6 shows the ejection pattern at the same header at the partition distance place of the 70mm that reduces; And
Fig. 7 shows the ejection pattern that obtains from combined type collecting pipe according to the present invention.
The specific embodiment
With reference to Fig. 8, in a concrete preferred embodiment,, and header is squinted mutually through the nozzle 17 (they are similar aspect size, quantity and the nozzle interval) of on header 1,2, arranging two arrays.Datum line 7 is parallel with the direction 6 that metal passes under nozzle, and the effect of this arrangement is, compare with any nozzle on the header 1, each nozzle 17 on the header 2 all be arranged to datum line at a distance of different distance.
Therefore, the injection stream of header 2 generations concentrates on any injection stream of header 1 generation and compares on the different vertical lines.Array is disposed in " standard " partition distance place, thereby makes that overlapping and one or two array can carry out scale removal to the whole width of metal from the spray pattern of one group of nozzle.Indicate like the front, but this " standard " distance depends on some parameters usually can be in the zone of 150mm.For example, at " minimum " partition distance place, when above the thicker end of array at blank, two arrays to the different of metal but overlapping areas are carried out scale removal.Usually, minimum partition distance can be in the zone of 70mm.
The spray pattern of two headers interweaves mutually and when the metal (such as blank) to varied in thickness carries out scale removal, uses two headers simultaneously.
With reference to Fig. 5, can find out, when being the standard partition distance of 150mm, exist little overlapping and impact pressure to be enough to carry out scale removal between each injection stream.
Fig. 6 shows when partition distance is reduced to 70mm, has tangible gap between each injection stream.The partition distance that Here it is will reach at the thick end of blank, if the header height be set to the thin end of blank and the thick end of blank be that 80mm is thick.
Yet, when blank is carried out scale removal, also use the second scale removal header.This second scale removal header is arranged such that its injection stream and the injection stream of first header interweave, thereby as illustrated in fig. 7 scale removal is carried out on the whole surface of blank.
In Fig. 7, spray pattern 12 spray pattern that to be first headers produce on the thin end of blank with the partition distance of 150mm.Because each injection stream is all overlapping a little with its adjacent injection stream, therefore can carry out scale removal to the whole width of blank.Spray pattern 13 spray pattern that to be second headers produce on the thin end of blank with the partition distance of 150mm.Can carry out scale removal to whole width equally.The thin end of blank is therefore by twice of scale removal.
Spray pattern 14 spray pattern that to be first headers produce on the thick end of blank with the partition distance of 70mm.Because there is gap 16 in the partition distance through reducing and whole width is not carried out scale removal between the injection stream.Spray pattern 15 spray pattern that to be second headers produce on the thick end of blank with the partition distance of 70mm.Yet the injection stream of second header intentionally squints with respect to the injection stream of first header, thereby makes spray pattern 15 fill the gap 16 in the spray patterns 14 and thereby the whole width of blank carried out scale removal.
Obviously, the place, some position between minimum thickness and maximum ga(u)ge, the gap 16 between the injection stream is with less, and pattern 14 and 15 can be overlapping more.Yet if the impact pressure at maximum partition distance place is enough to carry out good scale removal, overlapping between the pattern 14 and 15 is acceptable.
Another advantage of the present invention is, for the common sheet material that is difficult to scale removal (for example, because of their specific metallurgical technologies cause), the operator can determine to use simultaneously two kinds of headers and partition distance to be set to (for example) 70mm rather than 150mm.This will provide very high impact pressure, thereby can carry out scale removal better, and second header can guarantee still can carry out scale removal to whole width with short partition distance with respect to the skew of first header.
Claims (11)
1. metal descaling equipment comprises:
The first and second array nozzles, wherein, each nozzle is arranged to and when metal passes under said nozzle, guides cleaning mixture to be ejected on the said metal;
Be used to device that said metal is passed under said nozzle, wherein, the nozzle in each array be arranged to datum line at a distance of different distance, said datum line is parallel to the moving direction of said metal;
It is characterized in that second array comprises one group of nozzle, have the distance that is different from any nozzle in first array between each nozzle in second array and the said datum line.
2. equipment according to claim 1, wherein, each array comprises linear array.
3. equipment according to claim 2, wherein, each array is arranged to basic and said datum line quadrature.
4. equipment according to claim 3, wherein, the said nozzle in each array is equidistantly spaced apart.
5. method that metal is carried out scale removal comprises:
Arrange a plurality of nozzles, with along downward basically direction guiding cleaning mixture, said nozzle is disposed in two arrays, wherein, each nozzle be positioned in linear reference line at a distance of given distance; And
Said metal is passed in said nozzle along the direction that is parallel to said datum line, simultaneously via the nozzle guide cleaning mixture at least one said array,
It is characterized in that, a plurality of nozzles in second array be arranged to and said linear reference line between distance be different from any nozzle and the distance between the said linear reference line in first array.
6. method according to claim 5, wherein, said nozzle is disposed in the linear array.
7. method according to claim 6, wherein, said array is arranged to basic and said datum line quadrature.
8. method according to claim 7, wherein, the nozzle in each array is arranged to equidistantly spaced apart.
9. method according to claim 8; Wherein, When the substantially invariable sheet metal of thickness is passed under nozzle; Nozzle through at least the first array in two arrays guides cleaning mixture, and said first array is disposed in said metal top and said metal at a distance of enough distance, so that said cleaning mixture is sprayed on the said metallic surface with overlapping.
10. method according to claim 8; Wherein, When the substantially invariable sheet metal of thickness is passed under nozzle; Through the nozzle guide cleaning mixture in two arrays, these two arrays are arranged to the metal surface that guarantees apart from each distance of datum line and are covered by the injection stream from least one nozzle.
11. method according to claim 8; Wherein, When the sheet metal that makes varied in thickness passes under nozzle; Nozzle through in two arrays guides cleaning mixture, and these two arrays are disposed in said metal top and said metal at a distance of certain distance, guarantees from the cleaning mixture injection stream of an array overlapping on the top, metal surface in the thinnest zone of said metal thus; And guarantee that in the thickest zone of said metal the metal surface of said each distance of datum line of distance is covered by the injection stream from least one nozzle.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0910499A GB2471120B (en) | 2009-06-18 | 2009-06-18 | Descaler for variable thickness metal |
| GB0910499.3 | 2009-06-18 | ||
| PCT/EP2010/054567 WO2010145860A1 (en) | 2009-06-18 | 2010-04-07 | Descaler for variable thickness metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102458702A true CN102458702A (en) | 2012-05-16 |
| CN102458702B CN102458702B (en) | 2015-06-03 |
Family
ID=40941015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080026969.6A Expired - Fee Related CN102458702B (en) | 2009-06-18 | 2010-04-07 | Descaler for variable thickness metal |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN102458702B (en) |
| BR (1) | BRPI1011303A2 (en) |
| GB (1) | GB2471120B (en) |
| RU (1) | RU2012101632A (en) |
| WO (1) | WO2010145860A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2514599B (en) | 2013-05-30 | 2015-07-08 | Siemens Vai Metals Tech Gmbh | Adjustable descaler |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01278907A (en) * | 1988-04-27 | 1989-11-09 | Sumitomo Metal Ind Ltd | Method for descaling hot rolled steel sheet |
| JPH03294016A (en) * | 1990-04-10 | 1991-12-25 | Nkk Corp | De-scaling device in hot rolling |
| JP2001047122A (en) * | 1999-08-12 | 2001-02-20 | Hitachi Ltd | Descaling method and descaling device |
| CN1494466A (en) * | 2001-03-03 | 2004-05-05 | SMS�����ɷݹ�˾ | Method for removing scale from strips |
| CN101287559A (en) * | 2005-10-06 | 2008-10-15 | Sms迪马格股份公司 | Method and device for cleaning slabs, thin slabs, profiled elements, or similar |
| CN201186304Y (en) * | 2007-11-22 | 2009-01-28 | 中国第一重型机械集团公司 | Roughing descaler |
| CN101618406A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | Surface color difference control method for hot-rolled pickled plate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3307771B2 (en) * | 1993-08-23 | 2002-07-24 | ハンス‐ユルゲン、ガイドール | Means for descaling hot rolled steel sheets |
| JPH10278907A (en) * | 1997-04-08 | 1998-10-20 | Seiko Sangyo Kk | Apparatus and method for thermoforming plastic sheet |
-
2009
- 2009-06-18 GB GB0910499A patent/GB2471120B/en not_active Expired - Fee Related
-
2010
- 2010-04-07 RU RU2012101632/02A patent/RU2012101632A/en not_active Application Discontinuation
- 2010-04-07 BR BRPI1011303A patent/BRPI1011303A2/en not_active IP Right Cessation
- 2010-04-07 CN CN201080026969.6A patent/CN102458702B/en not_active Expired - Fee Related
- 2010-04-07 WO PCT/EP2010/054567 patent/WO2010145860A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01278907A (en) * | 1988-04-27 | 1989-11-09 | Sumitomo Metal Ind Ltd | Method for descaling hot rolled steel sheet |
| JPH03294016A (en) * | 1990-04-10 | 1991-12-25 | Nkk Corp | De-scaling device in hot rolling |
| JP2001047122A (en) * | 1999-08-12 | 2001-02-20 | Hitachi Ltd | Descaling method and descaling device |
| CN1494466A (en) * | 2001-03-03 | 2004-05-05 | SMS�����ɷݹ�˾ | Method for removing scale from strips |
| CN101287559A (en) * | 2005-10-06 | 2008-10-15 | Sms迪马格股份公司 | Method and device for cleaning slabs, thin slabs, profiled elements, or similar |
| CN201186304Y (en) * | 2007-11-22 | 2009-01-28 | 中国第一重型机械集团公司 | Roughing descaler |
| CN101618406A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | Surface color difference control method for hot-rolled pickled plate |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2471120B (en) | 2011-10-05 |
| WO2010145860A1 (en) | 2010-12-23 |
| GB2471120A (en) | 2010-12-22 |
| CN102458702B (en) | 2015-06-03 |
| GB0910499D0 (en) | 2009-07-29 |
| BRPI1011303A2 (en) | 2016-10-25 |
| RU2012101632A (en) | 2013-07-27 |
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| ASS | Succession or assignment of patent right |
Owner name: SIEMENS PLC Free format text: FORMER OWNER: SIEMENS VAI Effective date: 20131025 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20131025 Address after: British Campbelli Applicant after: Siemens PLC Address before: British South Yorkshire Applicant before: Siemens VAI Metal Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20150603 Termination date: 20180407 |