CN105268751A - Cold rolling emulsion purging method and purging system thereof - Google Patents
Cold rolling emulsion purging method and purging system thereof Download PDFInfo
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- CN105268751A CN105268751A CN201510866680.XA CN201510866680A CN105268751A CN 105268751 A CN105268751 A CN 105268751A CN 201510866680 A CN201510866680 A CN 201510866680A CN 105268751 A CN105268751 A CN 105268751A
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- air knife
- purging
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- purges
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- 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
- B21B45/02—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 lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0278—Cleaning devices removing liquids
- B21B45/0281—Cleaning devices removing liquids removing coolants
-
- 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
- B21B45/02—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 lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0278—Cleaning devices removing liquids
- B21B45/0284—Cleaning devices removing liquids removing lubricants
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention provides an improved cold rolling purging method and an automatic control system thereof. A purging method and a control system thereof before improvement have the problems that purging air pressure is low, clean purging cannot be achieved, and most of system pipeline valves are bad in stability and high in energy consumption; by means of improvement at present, only a purging beam at an outlet works according to change of the rolling direction, and besides, a rolling mill air knife is made to work in a phased mode according to the specific speed. According to the cold rolling purging method and the automatic control system thereof, the purging quality in the cold rolling process is improved, and meanwhile the energy consumption of the system is greatly reduced.
Description
Technical field
The present invention relates to the householder method in a kind of cold-rolled process and control system thereof, particularly a kind of for the emulsion blowing method in cold-rolled process and control system thereof.
Background technology
Emulsion is as rolling lubrication and cooling medium, very important effect is played in cold-rolled process, if but emulsion can not fully purge totally from steel plate face to be rolled in time in the operation of rolling, can be very large on rolling rear board surface quality impact, so emulsion purging system is an important part in cold-rolling process system, it mainly plays a part purge belt steel surface emulsion and prevent emulsion from splashing.The duty of emulsion purging system directly affects the production status of unit, has direct impact to rhythm of production, product quality.Under normal circumstances, in order to ensure to purge quality, purging system is in full-gear when rolling, needs to supply a large amount of compressed air steadily in the long term.For our factory, our factory double-stand reversible mill is the technology of Chinese No.1 Heavy Mechanical Group Co, and milling train adopts Stand Mill UCM milling train, and purging system wherein provides compressed air by 5 compressors, and energy resource consumption is very large.Before milling train purging system purges beam, 2# frame purging beam, machine primarily of 1# frame, after air knife, machine, air knife forms.Purging system is after frame, when emulsion injection beam is opened, the associated solenoid valve of purging system is opened automatically, and be that all purging valves are opened simultaneously, the air pressure provided due to compressed gas source is certain, so the air pressure arriving each purging component is lower, it is not fine for purging effect.In addition, milling train 1# frame purges beam and 2# frame purging beam is respectively controlled by 5 branch valve, and one has 10 branching valves, and the corresponding lateral of each valve, lateral is equipped with nozzle.Owing to more or less there is moisture in compressed air, in the long-term course of work, this valve system often occurs stuck or the situation that cannot normally work such as to fit badly, and this does not just cause compressed air controlled or purge clean, wastes very large.Due to the corresponding one group of nozzle of each valve: nozzle and lower adsorption nozzle under nozzle, guide plate top nozzle, guide plate in the middle part of roll edge nozzle, roll, each nozzle is towards rolling plate, but particular location is different, purging on some control strippers, the edge of the corresponding roll had, the middle part of the corresponding roll had, thus failure ratio is investigated more difficult, and each milling train periodical repair all will clean this valve system, time-consuming, take a lot of work, and effect is bad.
From field observation analysis, during mill milling, entrance does not have emulsion to take out of, and exports the splashing of a large amount of emulsion.When steel band enters from 1# frame, close 1# frame and purge beam valve, emulsion is not had to take out of, when can judge mill milling thus, entrance does not need to purge, as long as ensure that the purging of product outlet frame just can meet production, the problem of outlet air pressure deficiency can be solved like this, purging efficiency can be improved simultaneously.From rolling Time-Series analysis, the rolling of cold-strip steel forward, 2# frame goes out finished product; When the reverse rolling of cold-strip steel, 1# frame goes out finished product.As long as we ensure finished strip, surface purges totally, just can meet technological requirement, and therefore 1# and 2# frame purges beam does not need to purge simultaneously, only needs to go out according to concrete the duty that finished frame control 1# frame purges beam and 2# frame purging beam.
In addition, milling train air knife is divided into air knife after air knife before machine, machine.In the normal operation of rolling, in frame, have band steel in the middle of working roll roll gap place, there is gap in edge, all has emulsion to gush out during low speed rolling before and after frame, and therefore entrance, outlet air knife all have the effect preventing emulsion from gushing out or splash; During high-speed rolling, a large amount of emulsify at a high speed liquid is passed by the gap at roll gap edge, is splashed to outlet, and entrance emulsion is subject to being with the high speed of steel to drive, and spills seldom.As can be seen here, in the whole operation of rolling, automatic simultaneously air knife after air knife, machine before uncapping machine after roll-force comes into force, and always in running order, such operation process is very uneconomical.
Summary of the invention
For above phenomenon and problem, the present invention proposes a kind of purging process method of improvement, the method has saved the about compressed air of half, improvement prerequisite is made to be reduced to 3 for the air compressor of compressed air gas source by 5, but the pressure of purging system is raised to 7bar by 3bar, purging efficiency can also be increased substantially when ensureing good purging effect.The present invention is also optimized emulsion purging system, purging system after optimization meets on-the-spot need of work completely, but this purging system failure rate is low, can save a large amount of system maintenance time compared with original system, and the operating efficiency of whole system is improved.
Concrete purging process method and purging system prioritization scheme are:
1, purging process method is improved
1) purging process is made in order
Original two frames purged simultaneously and be optimized for frame and purge in exit according to rolling direction, be outlet purge during forward rolling at the purging in exit, during reverse rolling, former porch purges for outlet.
2) air knife purges for a long time and changes a point speed purging, point passage purging into
During forward rolling, air knife after air knife, machine before automatic opener after roll-force comes into force, when mill speed is more than 150m/min, air knife before automatic closedown machine, air knife after a uncapping machine.When milling train receives automatic retarding signal, speed is lower than air knife before 120m/min uncapping machine.After milling train automatic stopping, automatically close whole purging system.
During reverse rolling, air knife after air knife, machine before automatic opener after roll-force comes into force, when mill speed is more than 150m/min, air knife after automatic closedown machine, air knife before a uncapping machine.When milling train receives automatic retarding signal, speed is lower than air knife before 120m/min uncapping machine.After milling train stops, automatically close whole purging system.
2, simplify rolling-mill housing and purge structure
Simplify pipeline, original 10 control gas branching valves are removed, is directly communicated with.Install main valve at the trunk place that the lateral of each frame intersects, i.e. two control valves control 1#, 2# frame purging beam respectively, each frame purges beam only needs a main valve to control the nozzle of all laterals.
Improved cold rolling purging technique and control system thereof solve that purging system compressed air pressure is low, poor stability and the problem such as maintenance difficulties is large, ensure that the surface quality of flat cold-rolled sheet, improve milling train operating efficiency, considerably reduce milling train electric power consumption per ton steel.
Accompanying drawing explanation
Fig. 1 embodiment milling train purging system purge schematic diagram (before being 1. 4. respectively machine, machine post-purge air knife; 2. be 3. respectively 1# entrance, 2# rack outlet purges)
Fig. 2 improves front 1# or 2# frame and purges beam valve block structure figure
Fig. 3 embodiment 1# or 2# frame purge beam valve block structure figure
Fig. 4 forward cold rolling purging process chart
The reverse cold rolling purging process chart of Fig. 5
Detailed description of the invention
Following examples illustrate of the present invention, instead of the protection domain of restriction the claims in the present invention.
Originally the branching valve controlling milling train 1#, 2# frame purging beam 10 nozzles (each frame purges beam 5 nozzles) is all removed, change the trunk place intersected at each frame lateral into and main valve is installed, be i.e. two main valves control 1#, 2# frame purging beam respectively.
Double-stand reversible mill 1# frame purges beam and is positioned at before 1# frame, and 2# frame purging beam is positioned at after 2# frame, and during forward rolling, 1# frame purging beam is called that entrance purges beam, and the purging beam of 2# frame is called that outlet purges beam.The rolling of cold-strip steel forward, 2# frame goes out finished product, only allows 2# frame purge the work of beam pneumatic operated valve, namely only outputs mouthful blow down valve 3; During the reverse rolling of cold-strip steel, 1# frame goes out finished product, and former entrance 1# frame becomes outlet, therefore only allows the former entrance of 1# frame purge the work of beam pneumatic operated valve, namely only drives entrance blow down valve 2.
Milling train air knife is divided into air knife after air knife before machine, machine.According to rolling direction and speed purge operations, concrete technology is as follows:
Mill star-up, uncoiler and coiling machine work,
Forward rolling starts:
During starting low speed: air knife valve before automatic opener after roll-force comes into force, open air knife 1 before machine; Air knife valve after uncapping machine, opens air knife 4 after machine, purges the entrance of 1# frame and the outlet of 2# frame.
During high speed: when mill speed is more than 150m/min, air knife 1 before automatic cut out machine, air knife 4 after a uncapping machine, purges the outlet of band steel.
During deceleration: when milling train receives automatic retarding signal, and speed is lower than air knife 1 before 120m/min uncapping machine, now needs to purge the entrance of 1# frame and the outlet of 2# frame simultaneously.
After milling train stops, shut-down purge system, i.e. air knife 4 after air knife 1 before closedown machine, entrance blow down valve 2, outlet blow down valve 3, machine.
Reverse rolling starts:
During starting low speed: air knife valve before automatic opener after roll-force comes into force, open air knife 1 before machine; Air knife valve after uncapping machine, opens air knife 4 after machine, namely purges the entrance of 1# frame and the outlet of 2# frame simultaneously.
During high speed: when mill speed is more than 150m/min, air knife 4 after automatic cut out machine, air knife 1 before a uncapping machine, purges the outlet of band steel.
During deceleration: when milling train receives automatic retarding signal, and speed is lower than air knife 4 after 120m/min uncapping machine, now needs to purge the entrance of 1# frame and the outlet of 2# frame simultaneously.
After milling train stops, shut-down purge system, i.e. air knife 4 after air knife 1 before closedown machine, entrance blow down valve 2, outlet blow down valve 3, machine.
Claims (3)
1. a cold rolling purging method, comprises entrance and purges, exports purging and front and back milling train air knife purging, it is characterized in that: cold rolling purging also comprises the following steps:
1) forward rolling purges
Open outlet blow down valve (3) after roll-force comes into force, to open before the machine of milling train air knife air knife (4) after air knife (1) and machine simultaneously, when mill speed is more than 150m/min, air knife (1) before automatic closedown machine; Air knife (1) before rolling mill speed is lower than uncapping machine during 120m/min; After milling train stops, air knife (4) after air knife (1), outlet blow down valve (3), machine before closedown machine; Entrance blow down valve (2) remains cut out;
2) reverse rolling purges
Entrance blow down valve (2) is opened after roll-force comes into force, to open before the machine of milling train air knife air knife (4) after air knife (1) and machine simultaneously, when mill speed is more than 150m/min, air knife (4) after automatic closedown machine, air knife (1) before a uncapping machine; Air knife (4) after rolling mill speed is lower than uncapping machine during 120m/min; After milling train stops, air knife (4) after air knife (1), entrance blow down valve (2), machine before closedown machine; Outlet blow down valve (3) remains closedown.
2. one kind realizes the purging system of method described in claim 1, comprise that entrance purges beam, outlet purges beam, air knife and compressed air gas source after air knife, machine before machine, it is characterized in that: described entrance purges beam and outlet purging beam also respectively has plural lateral, and each purging beam controls all laterals by a main valve.
3. purging system according to claim 2, is characterized in that: described entrance purges beam and outlet purging beam is respectively equipped with five laterals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510866680.XA CN105268751A (en) | 2015-11-30 | 2015-11-30 | Cold rolling emulsion purging method and purging system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510866680.XA CN105268751A (en) | 2015-11-30 | 2015-11-30 | Cold rolling emulsion purging method and purging system thereof |
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| CN105268751A true CN105268751A (en) | 2016-01-27 |
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| CN201510866680.XA Pending CN105268751A (en) | 2015-11-30 | 2015-11-30 | Cold rolling emulsion purging method and purging system thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106269930A (en) * | 2016-08-29 | 2017-01-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of method improving titanium band hot-working surface quality |
| CN118237398A (en) * | 2024-05-24 | 2024-06-25 | 江苏九天光电科技有限公司 | Multi-roller multi-frame reversible cold rolling mill and rolling method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3192752A (en) * | 1963-06-27 | 1965-07-06 | Aluminum Co Of America | Cold rolling aluminum and product |
| CN201676846U (en) * | 2009-12-11 | 2010-12-22 | 攀钢集团钢铁钒钛股份有限公司 | Steel band surface blowing and cleaning apparatus and equipment to reel steel band |
| CN202683628U (en) * | 2012-06-07 | 2013-01-23 | 中国重型机械研究院有限公司 | United scavenging device of two-stand temper mill |
| CN203174158U (en) * | 2013-03-30 | 2013-09-04 | 北京首钢自动化信息技术有限公司 | Purging device with liquid steel quenching part |
| CN103521519A (en) * | 2013-10-15 | 2014-01-22 | 莱芜市泰山冷轧板有限公司 | Cold-rolled steel strip rolling method |
| CN203470496U (en) * | 2013-08-15 | 2014-03-12 | 天津市皇泰新型机电节能材料有限公司 | Novel air blowing device |
| CN104646440A (en) * | 2015-01-28 | 2015-05-27 | 山东钢铁股份有限公司 | Device and method for removing emulsion on surfaces of cold-rolled steel strips |
-
2015
- 2015-11-30 CN CN201510866680.XA patent/CN105268751A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3192752A (en) * | 1963-06-27 | 1965-07-06 | Aluminum Co Of America | Cold rolling aluminum and product |
| CN201676846U (en) * | 2009-12-11 | 2010-12-22 | 攀钢集团钢铁钒钛股份有限公司 | Steel band surface blowing and cleaning apparatus and equipment to reel steel band |
| CN202683628U (en) * | 2012-06-07 | 2013-01-23 | 中国重型机械研究院有限公司 | United scavenging device of two-stand temper mill |
| CN203174158U (en) * | 2013-03-30 | 2013-09-04 | 北京首钢自动化信息技术有限公司 | Purging device with liquid steel quenching part |
| CN203470496U (en) * | 2013-08-15 | 2014-03-12 | 天津市皇泰新型机电节能材料有限公司 | Novel air blowing device |
| CN103521519A (en) * | 2013-10-15 | 2014-01-22 | 莱芜市泰山冷轧板有限公司 | Cold-rolled steel strip rolling method |
| CN104646440A (en) * | 2015-01-28 | 2015-05-27 | 山东钢铁股份有限公司 | Device and method for removing emulsion on surfaces of cold-rolled steel strips |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106269930A (en) * | 2016-08-29 | 2017-01-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of method improving titanium band hot-working surface quality |
| CN118237398A (en) * | 2024-05-24 | 2024-06-25 | 江苏九天光电科技有限公司 | Multi-roller multi-frame reversible cold rolling mill and rolling method thereof |
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Application publication date: 20160127 |
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