CN203061581U - Lubricating oil supply system for cold tandem mill - Google Patents
Lubricating oil supply system for cold tandem mill Download PDFInfo
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- CN203061581U CN203061581U CN 201320031739 CN201320031739U CN203061581U CN 203061581 U CN203061581 U CN 203061581U CN 201320031739 CN201320031739 CN 201320031739 CN 201320031739 U CN201320031739 U CN 201320031739U CN 203061581 U CN203061581 U CN 203061581U
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Abstract
The utility model discloses a lubricating oil supply system for a cold tandem mill. The lubricating oil supply system for the cold tandem mill comprises a plurality of emulsion supply pipelines, a plurality of mixers, a plurality of rolling oil supply pipelines and a plurality sets of nozzles, wherein the plurality of emulsion supply pipelines are arranged corresponding to a plurality of machine frames in front of the last machine frame respectively; the input end of each mixer is correspondingly connected with each emulsion supply pipeline; the plurality of rolling oil supply pipelines are connected with the input end of each mixer correspondingly and respectively; the plurality sets of nozzles are connected with the output end of each mixer respectively; each set of nozzle is correspondingly arranged in front of the corresponding machine frame in the travelling direction of band steel; and each set of nozzle comprises an upper nozzle positioned above the band steel and a lower nozzle positioned below the band steel. After the adoption of the technical scheme, the utility model has the advantages that rolling production of part of ferrite stainless steel and other types of steel can be met simultaneously; the production applicability of the cold tandem mill unit is improved; and the productivity of the cold tandem mill unit is improved.
Description
Technical field
The utility model relates to a kind of metal manufacture field, relates in particular to a kind of oil feeding device of metal rolled usefulness.
Background technology
Stainless steel material has higher intensity and the fast trend of work hardening owing to it, thereby adopts the reversible multi-roll mill of single chassis to produce usually, and multi-roll mill refers to single breast roller number at the milling train more than 6,6 roller mills, as shown in Figure 1; 12 roller mills, as shown in Figure 2; 18 roller mills, as shown in Figure 3, or 20 roller mills, as shown in Figure 4.In actual production process, stainless steel material need reciprocal a plurality of passages just can be produced qualified steel finished product on singlestandmill, therefore can bring higher cost pressure to enterprise.But be accompanied by the research and development of rolling technique and stainless steel new product, part stainless steel product, especially part ferritic stainless steel (as SUH409L, SUS410L and SUS430) also can carry out processing at 4 rollers of conventional multimachine frame or the cold continuous rolling of 6 roller mills combination.
Modern tandem mill has the advantages that adaptability is strong, mill speed is fast, production capacity is strong, milling train can the production various steels, and mill speed very high (more than the 1000m/min), the part ferritic stainless steel is by such cold continuous rolling processing, and its production cost can be effectively controlled.In order to realize the big production capacity of cold continuous rolling, producing the steel that also can produce other kinds outside the stainless steel, as all kinds of straight carbon steels etc.Different steel grades are the difference to some extent of main rolling mill practice when cold continuous rolling is produced, in process of production because heat conduction and the high-intensity performance of stainless steel product, be easy at steel plate and roll " hot scratch ", " heat scratches " or blemish such as " burns " take place, this type of blemish is the problem that cold rolling production process must be stopped, in case generation can cause band steel degradation or declare useless situation, the simultaneously cold rolling roll that connects machine must be changed.
In process of production, can take two kinds of measures to avoid the generation of the problems referred to above: first kind of measure is to adopt to slow down the heating problem of stainless mill speed when producing with control, but objectively influenced like this cold continuous rolling when stainless steel is produced mill speed and finally cause production capacity to be difficult to lifting; Another kind of measure is the generation of avoiding above-mentioned defective by the lubricity that improves the rolling oil product that uses when producing, this method can but also more efficiently be controlled product quality under the prerequisite that not only guarantees speed of production, but have than a large amount of all kinds of artificial synthetic fats and the extraordinary abrasion resistant extreme-pressure additives of using of the special rolling oil require of high lubricating property, can increase rolling cost with oil like this, the production cost of cold rolling unit is also high; Because rolling lubrication is promoted greatly, when same tandem mills is given birth to other steel grade, can face a series of production problems such as roll skids, roll-force fluctuation, production stability reduction again simultaneously.
With solve steel strip surface defect and satisfy the relevant patent documentation of the big production capacity of cold rolling production as follows:
Publication number is EP1193004A1, open day is on April 3rd, 2002, name is called the European patent document of " a kind of supply method for cold rolling oil ", it has proposed a kind of method for supplying lubricant that plays the steady production effect in cold continuous rolling, this design philosophy is when cold continuous rolling high-speed rolling product thickness during less than the thin plate of 0.2mm, at 4 of milling train, spraying before 5 frames and contain bulky grain degree (〉 20 μ m) emulsion of ROLLING OIL to be to play the purpose of steady production, but this method is for 4, chemical composition and the use amount of the surface additive in the composition of the employed ROLLING OIL of 5 frames have comparatively special requirement, therefore, also need in actual use to adjust 4 at any time, the concentration of emulsion used of 5 frames, such method and apparatus uses cost higher, operation is also complicated, does not possess the popularization of large-scale production.
Publication number is WO03022474A1, open day is on March 20th, 2003, the international monopoly document that name is called " Combination application of lubricating oil and emulsion when cold-rolled strip " discloses a kind of knockdown emulsion/ROLLING OIL supply method, namely on the frame of the end of cold continuous rolling, adopt the method for optionally spraying ROLLING OIL or emulsion simultaneously, it has changed the way that the traditional cold tandem mill only sprays emulsion, change into and spray pure ROLLING OIL with the generation of reduction steel strip surface defect, and rolling oil composition is not had specific (special) requirements.But, this invention is poor owing to the ROLLING OIL heat conductivility in actual production, can only be applicable to that some deflection is very little and when producing mill speed be not very high band steel production process, so method is not suitable for the production of stainless steel on cold continuous rolling, and do not possess the generality of popularization yet.
Publication number is CN101084074A, open day is on December 5th, 2007, name is called the Chinese patent literature of " method for supplying lubricant in cold rolling ", related to a kind of low-cost and suppress the ROLLING OIL supply method that " heat scratches " blemish takes place effectively in cold continuous rolling, the essential core of this technical scheme is to adopt two kinds of ROLLING OIL to produce: a kind of is low-cost common ROLLING OIL, and another is expensive ROLLING OIL; During production at the production of different steel grades, spray different ROLLING OIL and contain the mixed rolling oil of high and low cost different proportion, this technical scheme can be avoided spraying expensive synthetic ROLLING OIL less when producing as far as possible, thereby reaches the purpose that saves production cost.But in actual production process, reclaim to use because emulsion is circulation, thereby with regard to being faced with for the reclaiming again and the problem of recycling of the mixture of two kinds of ROLLING OIL, can bring certain influence for the operation ease of whole technical proposal.
Above-mentioned patent documentation is used for solving the problem that the rolling stainless steel product of cold continuous rolling production high speed brings, require on the one hand to adopt to contain synthetic ROLLING OIL certain chemical constitution, that have the good lubrication performance, can bring the problem of higher production cost so again; Though sharp on the other hand do not have special requirement to rolling oil composition, is difficult to guarantee to reach high-speed rolling and surperficial flawless purpose in actual production.
The utility model content
The purpose of this utility model provides a kind of lubricating oil feed system for cold continuous rolling, this lubricating oil feed system is not subjected to the restriction of special rolling oil, use common ROLLING OIL can satisfy part ferritic stainless steel and the cold rolling processing request of other types of steel kinds simultaneously, can avoid producing the cut blemish at surface of steel plate, can guarantee that again cold rolling speed is to improve the production production capacity.
In order to reach the purpose of above-mentioned utility model, the utility model provides a kind of lubricating oil feed system for cold continuous rolling, and it comprises:
Several emulsion feeding pipes, several frames before last frame of corresponding cold continuous rolling arrange respectively;
Several blenders, the input of each blender respectively with the corresponding connection of each emulsion feeding pipe;
Several ROLLING OIL feeding pipes, its respectively with the corresponding connection of input of each blender;
Some cover nozzles, it is connected with the output of each blender respectively, along the direction of travel of band steel, described respectively overlap nozzle respectively correspondence be located at corresponding frame the place ahead, the described nozzle that respectively overlaps includes the following nozzle that a top nozzle and that is positioned at band steel top is positioned at band steel below.
At above-mentioned lubricating oil feed system for cold continuous rolling, be provided with corresponding emulsion feeding pipe before each frame before last frame of cold continuous rolling, the ROLLING OIL feeding pipe, the blender and a pair of nozzle that are used for mix emulsion fluid and ROLLING OIL, wherein, each emulsion feeding pipe can be regulated flow and the concentration of emulsion independently of one another by valve, and each ROLLING OIL feeding pipe also can be regulated the flow of ROLLING OIL independently of one another by valve.When production part ferritic stainless steel steel grade (as SUH409L, SUS410L and SUS430) time, the ROLLING OIL that comes from the ROLLING OIL feeding pipe enters blender with the emulsion that comes from the emulsion feeding pipe, by the powerful immixture of disperseing of blender ROLLING OIL and emulsion are formed homodisperse mixed liquor, respectively mixed liquor is ejected into the upper and lower surface of band steel before the frame again via a pair of nozzle up and down that is installed in band steel upper and lower surface side, with the certain lubricity that provides in the rolling deformation zone, thereby avoid causing forming scratch on steel plate and the roller surface owing to the high-speed rolling of tandem rolling unit defectives such as scuffing or burn.When producing the steel grade of non-stainless steel or other types, close the ROLLING OIL feeding pipe, stop the supply of ROLLING OIL, the emulsion that only comes from the emulsion feeding pipe, respectively emulsion is ejected into the upper and lower surface of band steel before the frame via a pair of nozzle up and down that is installed in band steel upper and lower surface side, make cold continuous rolling outside rolling part ferritic stainless steel, can also carry out the Rolling Production of other types steel grade, also can not cause roll owing to too much lubricating oil simultaneously skids, the generation of degradation problem under roll-force fluctuation and the production stability is with broad applicability and the production capacity raising property that realizes cold continuous rolling.
Further, above-mentioned blender is static mixer.The static mixer utilization is fixed on the flow regime of mixed cell structural reform fluid in pipe in the pipe, to reach fine dispersion and well-mixed purpose between the different fluid.
Further, above-mentioned top nozzle and following nozzle all preferably are arranged as perpendicular to the band steel.Compare and favour the nozzle of installing at belt steel surface, nozzle up and down along the installation of steel band vertical direction, owing to form the vertical width of cloth district of spraying at belt steel surface, therefore, the liquid spray regime is comparatively concentrated, the oil-water separation that is conducive to emulsion is for rolled band steel provides enough required greasy property.
Further, the distance H of the working roll center line on the corresponding frame of contact point distance of nozzle center's extension line of above-mentioned top nozzle and/or following nozzle and band steel is 0.5～3.5m.
Further, the distance H of the working roll center line on the corresponding frame of contact point distance of nozzle center's extension line of above-mentioned top nozzle and/or following nozzle and band steel is 1.0～2.5m.
Compare with existing technical scheme, lubricating oil feed system for cold continuous rolling described in the utility model, be not subject to the application of special rolling oil, adopt common ROLLING OIL cooperation with the interpolation of emulsion, its can the required emulsion of each frame of independent regulation concentration and the flow of flow and ROLLING OIL, the advantage that the technical solution of the utility model possesses is:
1) satisfies the Rolling Production of part ferritic stainless steel and other types steel grade simultaneously;
2) avoid the cold rolling excessive velocities and cause stainless-steel sheet and roller surface to produce scratch defects;
3) prevent when rolling that non-stainless steel strip surface is too lubricated and cause roll and skid the generation of the situation that roll-force fluctuation and production stability descend;
4) the production applicability of raising tandem mills;
5) the production production capacity of lifting tandem mills.
Description of drawings
Fig. 1 has shown 6 roller mill roll arrangement schematic diagrames of the prior art.
Fig. 2 has shown 12 roller mill roll arrangement schematic diagrames of the prior art.
Fig. 3 has shown 18 roller mill roll arrangement schematic diagrames of the prior art.
Fig. 4 has shown 20 roller mill roll arrangement schematic diagrames of the prior art.
Fig. 5 has shown the structural representation of lubricating oil feed system under a kind of embodiment for cold continuous rolling described in the utility model.
Fig. 6 has shown the corresponding cover of a certain frame of the lubricating oil feed system for the cold continuous rolling described in the utility model nozzle structural representation that tilts or install perpendicular to belt steel surface along band steel direction of travel up and down.
The specific embodiment
Below will be described further the lubricating oil feed system for cold continuous rolling described in the utility model according to specific embodiment and Figure of description, but this explanation does not constitute improper restriction of the present utility model.
As shown in Figure 5, in the present embodiment, this lubricating oil feed system is used for 5 frame tandem mills, 4 emulsion feeding pipes 51,4 ROLLING OIL feeding pipes 52 and 4 static mixers 53, be installed in 1# to the 4# frame 54 of tandem mills respectively accordingly before; Be provided with valve 57 at each emulsion feeding pipe 51 and come from the flow of the emulsion A of same emulsion box with control, each ROLLING OIL feeding pipe 52 is provided with valve 58 comes from the ROLLING OIL B of same rolling fuel tank with control flow; The input of each static mixer 53 respectively with each emulsion feeding pipe 51 corresponding connection, similarly, the input of each static mixer 53 also respectively with each ROLLING OIL feeding pipe 52 corresponding connection, emulsion A and ROLLING OIL B mix fully and form homodisperse mixed liquor C in each static mixer; 4 cover nozzles are connected with the output of each static mixer 53 respectively, and its direction of travel P correspondence along the band steel is arranged at the place ahead of corresponding frame to spray mixed liquor C or the emulsion A of ROLLING OIL and emulsion to belt steel surface, and every suit nozzle includes the top nozzle 55 that is arranged on band steel upper surface and the following nozzle 56 that is arranged on band steel lower surface.
As shown in Figure 6, at the lubricating oil feed system that is used for cold continuous rolling, top nozzle 55 and following nozzle 56 can adopt along band steel direction of travel P and favour the belt steel surface setting, the extension line X of nozzle center of top nozzle and/or following nozzle, the distance H of working roll center line Z on the corresponding frame of contact point distance of Y and band steel is 0.5～3.5m, and the distance of top nozzle and/or following nozzle distance frame working roll center line separately can be the same or different.Adopt in the present embodiment along band steel direction of travel P perpendicular to the belt steel surface setting, and control the extension line X ' of nozzle center of each top nozzle and each time nozzle, the scope of the distance H of the working roll center line Z on the corresponding frame of the contact point distance of Y ' and band steel ' identical, distance H ' is 1.0～2.5m.
In addition, can be according to the rolling situation of actual production, be equipped with independently emulsion box of corresponding difference for each emulsion feeding pipe, or be equipped with independently rolling fuel tank of corresponding difference for each ROLLING OIL feeding pipe, to satisfy in the rolling unit each frame for the lubricated needs of belt steel rolling.Because in the present embodiment, only adopt an emulsion box and a rolling fuel tank respectively each emulsion feeding pipe and each ROLLING OIL feeding pipe to be carried, therefore, emulsion temperature, concentration and interior ROLLING OIL composition thereof in 4 emulsion feeding pipes are all identical, simultaneously, the ROLLING OIL in 4 each ROLLING OIL feeding pipes also is with a kind of lubricating oil.
Adopt the lubricating oil feed system that is used for the cold continuous rolling of 5 frames in the present embodiment respectively the dissimilar ferrite stainless strip steel of part to be rolled production, wherein, emulsion box provides emulsion to cool off for 1～4 frame in the milling train group and lubricates, the concentration of emulsion is 2.8%, the temperature of emulsion is 55 ℃, and the expulsion pressure of emulsion is 7.0bar; The main character parameter of ROLLING OIL is as shown in table 1.
In addition, according to different actual conditions, the concentration of emulsion used scope can be 0.2～5%, and temperature range can be 40～65 ℃, and expulsion pressure can be controlled between 1.0～10bar.
The main character parameter of common ROLLING OIL during table 1 Rolling Production
| Synthetic fat content (weight %) | ≤25% |
| 40 ℃ of (mm of viscosity 2/s） | 40 |
| 100 ℃ of (mm of viscosity 2/s） | 8.4 |
| Saponification number (mg KOH/g) | 185 |
| Acid number (mg KOH/g) | 6.2 |
| PH(3% concentration) | 5.4 |
As shown in Figure 5, emulsion in the emulsion box extracted by pump be delivered to emulsion feeding pipe 51 and enter in the blender 53, similarly, ROLLING OIL in the rolling fuel tank also extracted by pump be delivered to ROLLING OIL feeding pipe 52 and enter in the blender 53, owing to be provided with valve 57 at each emulsion supply pipe 51 and each ROLLING OIL feeding pipe 52,58, therefore, can regulate and control the feed flow size of each frame 54 required emulsion A and ROLLING OIL B.Before each top nozzle 55 and following nozzle 56 all are installed in each frame 54 perpendicular to the band steel, and respectively overlap nozzle symmetry installation up and down; Before the 1st frame one cover nozzle is arranged on the 1.5m place of distance the 1st frame working roll center line, before the 2nd frame one cover nozzle is arranged on the 1.5m place of distance the 2nd frame working roll center line, before the 3rd frame one overlapped the 2.0m place that nozzle is arranged on distance the 3rd frame working roll center line, the cover of one before the 4th frame nozzle is arranged on the 2.0m place of distance the 4th frame working roll center line.
When being rolled for SUH409L, SUS410L and three kinds of ferrite stainless strip steels of SUS430, the injection flow parameter of corresponding ROLLING OIL and emulsion, as table 2 to shown in the table 5.
The ROLLING OIL of the ferritic stainless steel of the rolling SUH409L of table 2 employing 5 frame cold continuous rollings and injection flow parameter (milling train inlet thickness: 4.12mm, milling train exit thickness: 1.19mm, the strip width: 1250mm) of emulsion
The ROLLING OIL of the ferritic stainless steel of the rolling SUH409L of table 3 employing 5 frame cold continuous rollings and injection flow parameter (milling train inlet thickness: 2.91mm, milling train exit thickness: 0.66mm, the strip width: 1250mm) of emulsion
The ROLLING OIL of the ferritic stainless steel of the rolling SUS410L of table 4 employing 5 frame cold continuous rollings and injection flow parameter (milling train inlet thickness: 3.58mm, milling train exit thickness: 0.79mm, the strip width: 1290mm) of emulsion
The ROLLING OIL of the ferritic stainless steel of the rolling SUS430 of table 5 employing 5 frame cold continuous rollings and injection flow parameter (milling train inlet thickness: 2.89mm, milling train exit thickness: 0.50mm, the strip width: 1250mm) of emulsion
* annotate: the safety speed that table 2 relates to the table 5 refers to the maximum speed when the 5th frame outlet band steel when producing " hot cut " defective do not take place.
By table 2 to table 5 as can be known, when the lubricating oil feed system in the employing present embodiment is produced rolling SUH409L, SUS410L and SUS430 ferritic stainless steel, the 5th frame safety speed is higher, can satisfy the big production capacity demand of cold rolling production, and be not easy on the surface of band steel and roll " hot cut ", " heat scratches " or bad defectives such as " burns " take place.The technical solution of the utility model design principle is simple, and relevant device is ripe and install conveniently, can more efficiently promote the surface quality of producing the band steel, stops with the steel degradation or declares useless and cause the rising of production cost.
Need to prove, because the lubricating oil feed system that is used for cold continuous rolling of present embodiment can be closed the ROLLING OIL feeding pipe when producing rolling non-stainless steel strip, only open the emulsion feeding pipe, avoid roll to skid, the problem that roll-force fluctuation and production stability descend.The lubricating oil feed system that such cover is used for cold continuous rolling both can the common ferritic stainless steel of Rolling Production part, belt steel material that again can the Rolling Production other types, and produced on-site and operation are not had extra demand, have higher universality and application and popularization value.
It should be noted that above cited embodiment only is specific embodiment of the utility model.Obviously the utility model is not limited to above embodiment, and the similar variation of thereupon making or distortion are that those skilled in the art can directly draw or be easy to and just associate from the disclosed content of the utility model, all should belong to protection domain of the present utility model.
Claims (5)
1. a lubricating oil feed system that is used for cold continuous rolling is characterized in that, comprising:
Several emulsion feeding pipes, several frames before last frame of corresponding cold continuous rolling arrange respectively;
Several blenders, the input of each blender respectively with the corresponding connection of each emulsion feeding pipe;
Several ROLLING OIL feeding pipes, its respectively with the corresponding connection of input of each blender;
Some cover nozzles, it is connected with the output of each blender respectively, along the direction of travel of band steel, described respectively overlap nozzle respectively correspondence be located at corresponding frame the place ahead, the described nozzle that respectively overlaps includes the following nozzle that a top nozzle and that is positioned at band steel top is positioned at band steel below.
2. the lubricating oil feed system for cold continuous rolling as claimed in claim 1 is characterized in that, described blender is static mixer.
3. the lubricating oil feed system for cold continuous rolling as claimed in claim 1 or 2 is characterized in that, top nozzle and following nozzle all are arranged as perpendicular to the band steel.
4. the lubricating oil feed system for cold continuous rolling as claimed in claim 1 or 2, it is characterized in that the distance H of the working roll center line on the corresponding frame of contact point distance of nozzle center's extension line of described top nozzle and/or following nozzle and band steel is 0.5～3.5m.
5. the lubricating oil feed system for cold continuous rolling as claimed in claim 3, it is characterized in that the distance H of the working roll center line on the corresponding frame of contact point distance of nozzle center's extension line of described top nozzle and/or following nozzle and band steel is 1.0～2.5m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031739 CN203061581U (en) | 2013-01-22 | 2013-01-22 | Lubricating oil supply system for cold tandem mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031739 CN203061581U (en) | 2013-01-22 | 2013-01-22 | Lubricating oil supply system for cold tandem mill |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983770A (en) * | 2016-10-27 | 2018-05-04 | 福建宏旺实业有限公司 | A kind of hot acid of stainless steel washes production technology |
| CN107983773A (en) * | 2016-10-27 | 2018-05-04 | 福建宏旺实业有限公司 | A kind of again rolling mill practice of hot-rolled stainless steel |
| CN111195656A (en) * | 2018-11-19 | 2020-05-26 | 宝山钢铁股份有限公司 | Rolling lubrication process and emulsion suitable for simultaneous production of plain carbon steel and high-strength steel |
| CN115647077A (en) * | 2022-12-09 | 2023-01-31 | 首钢智新迁安电磁材料有限公司 | Cold continuous rolling unit for improving temperature control precision and control method thereof |
-
2013
- 2013-01-22 CN CN 201320031739 patent/CN203061581U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983770A (en) * | 2016-10-27 | 2018-05-04 | 福建宏旺实业有限公司 | A kind of hot acid of stainless steel washes production technology |
| CN107983773A (en) * | 2016-10-27 | 2018-05-04 | 福建宏旺实业有限公司 | A kind of again rolling mill practice of hot-rolled stainless steel |
| CN107983770B (en) * | 2016-10-27 | 2019-09-13 | 福建宏旺实业有限公司 | A kind of hot acid of stainless steel washes production technology |
| CN107983773B (en) * | 2016-10-27 | 2019-10-29 | 福建宏旺实业有限公司 | A kind of rolling mill practice again of hot-rolled stainless steel |
| CN111195656A (en) * | 2018-11-19 | 2020-05-26 | 宝山钢铁股份有限公司 | Rolling lubrication process and emulsion suitable for simultaneous production of plain carbon steel and high-strength steel |
| CN111195656B (en) * | 2018-11-19 | 2021-08-17 | 宝山钢铁股份有限公司 | Rolling lubrication process and emulsion suitable for simultaneous production of plain carbon steel and high-strength steel |
| CN115647077A (en) * | 2022-12-09 | 2023-01-31 | 首钢智新迁安电磁材料有限公司 | Cold continuous rolling unit for improving temperature control precision and control method thereof |
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