CN104550092A - Roller cleaning device - Google Patents
Roller cleaning device Download PDFInfo
- Publication number
- CN104550092A CN104550092A CN201410850375.7A CN201410850375A CN104550092A CN 104550092 A CN104550092 A CN 104550092A CN 201410850375 A CN201410850375 A CN 201410850375A CN 104550092 A CN104550092 A CN 104550092A
- Authority
- CN
- China
- Prior art keywords
- high pressure
- under high
- water under
- loaded
- collector
- Prior art date
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/022—Cleaning travelling work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/024—Cleaning by means of spray elements moving over the surface to be cleaned
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
- B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
Abstract
The invention discloses a roller cleaning device, and relates to a roller surface cleaning device for a temper mill in a cold-rolling hot-galvanizing unit. The roller cleaning device is characterized by including an upper roller cleaning device and a lower roller cleaning device, wherein the upper and lower roller cleaning devices are respectively installed at the upper part and the lower part of the outlet end on the inner side of the rack. The roller cleaning device has the characteristics of being novel in structure, simple and convenient to machine, convenient to use, distinct and thorough and high in work efficiency, and ensuing the clean surface of strip steel and product quality, thus belonging to a novel roller cleaning device integrating economy and practicability.
Description
Technical field
Roll cleaning device of the present invention, relates to the roller surface cleaning plant of planisher in a kind of cold rolling hot dip galvanizing unit.
Background technology
Modern zinc-plated iron-steel is produced and is required more and more higher to strip surface quality.Four rollers in galvanizing unit or six roller planishers are the visual plants improving band steel plate type and surface quality.Due to the needs of unit technique, planisher is generally arranged in the rear portion of whole piece galvanizing unit.Because unit is anterior, zinc-plated processing is carried out to band steel, belt steel surface often adheres to zinc-plated dust, these dust when being with steel by planisher rolling, on the working roll that can be attached to planisher and backing roll.Along with follow-up rolling, the zinc-plated dust be attached on working roll and backing roll can be imprinted on follow-up band steel again again, and produces impression more clearly, affects strip surface quality.Galvanizing unit temper mill roller cleaning plant many employings grinding wheel head structure in the past or blade construction, from production practices feedback, it is all undesirable that zinc-plated dust effect cleared up by the cleaning plant of these two kinds of structures.For problem existing in above-mentioned prior art, a kind of novel roll cleaning device of research and design, thus the problem existing for overcoming in prior art is very necessary.
Summary of the invention
In view of problem existing in above-mentioned prior art, the object of the invention is a kind of novel roll cleaning device of research and design.Exist in prior art in order to solve: 1, because zinc-plated dust is attached to roller surface, essence on follow-up band steel, is affected the problem of strip surface quality by coining again; 2, existing cleaning roller surface dust uses scraper or grinding wheel head structure, and cleaning effect is not good; 3, existing cleaning roller surface dust uses scraper or grinding wheel head structure, the problems such as hard damage is caused on easy breaker roll surface, influence zone steel crudy.
Technical solution of the present invention is achieved in that
Roll cleaning device of the present invention; It is characterized in that described roll cleaning device comprises topping roll cleaning plant and bottom roll cleaning plant; Topping roll cleaning plant and bottom roll cleaning plant are loaded on top and the bottom of the inner side port of export of frame respectively;
Described topping roll cleaning plant comprises cleaning device, upper running gear, upper fixed cross beam and gear motor drive unit; Upper fixed cross beam is assemblied in port of export top inside frame; Upper running gear is loaded on the track of fixed cross beam, and upper cleaning device is loaded on running gear, and reciprocating on upper fixed cross beam with upper running gear; Gear motor drive unit is loaded on fixed cross beam edge, and is connected with upper running gear;
Upper running gear of the present invention comprises N-type vehicle frame, wheel, directive wheel and upper installing rack; N-type frame interior is equipped with wheel and directive wheel, and wheel is loaded in the track of fixed cross beam, and directive wheel contacts with the both sides of upper fixed cross beam, and the traffic direction of directive wheel to upper running gear plays guide effect; Upper installing rack is loaded on N-type vehicle frame, and the lower inclined plane of upper installing rack is equipped with sliding sleeve I; N-type vehicle frame is connected with gear motor drive unit;
Upper cleaning device of the present invention comprises water under high pressure collector I, water under high pressure collector II, nozzle, water collector frame and cylinder; Water collector frame is L-type structure; Water under high pressure collector I is L-type mechanism, is loaded on the outside of water collector frame, and water under high pressure collector II is straight pipe type, is loaded on one end of water collector frame, and is sleeved in sliding sleeve I; Water under high pressure collector I and water under high pressure collector II form a U-shaped structure; Cylinder is loaded on the lower inclined plane of installing rack, and its piston rod is connected with water under high pressure collector II by connecting rod; Water under high pressure collector I is equipped with nozzle with the front end of water under high pressure collector II, and rear end is connected with water system;
Described bottom roll cleaning plant comprises lower cleaning device, lower running gear, lower fixed cross beam and gear motor drive unit; Lower fixed cross beam is assemblied in port of export bottom inside frame; Lower running gear is loaded on the track of lower fixed cross beam, and lower cleaning device is loaded on lower running gear, and reciprocating on lower fixed cross beam with lower running gear; Gear motor drive unit is loaded on lower fixed cross beam edge, and is connected with lower running gear;
Lower running gear of the present invention comprises N-type vehicle frame, wheel, directive wheel and lower installing rack; N-type frame interior is equipped with wheel and directive wheel, and wheel is loaded in the track of lower fixed cross beam, and directive wheel contacts with the both sides of lower fixed cross beam, and the traffic direction of directive wheel to lower running gear plays guide effect; Lower installing rack is loaded on N-type vehicle frame, and the ramp of lower installing rack is equipped with sliding sleeve II; N-type vehicle frame is connected with gear motor drive unit;
Lower cleaning device of the present invention comprises water under high pressure collector III, water under high pressure collector IV, nozzle, water collector frame and cylinder; Water collector frame is inverted L shape structure; Water under high pressure collector IV is L-type mechanism, is loaded on the outside of water collector frame, and water under high pressure collector III is straight pipe type, is loaded on one end of water collector frame, and is sleeved in sliding sleeve II; Water under high pressure collector III and water under high pressure collector IV form a U-shaped structure; Cylinder is loaded on the ramp of lower installing rack, and its piston rod is connected with water under high pressure collector III by connecting rod; Water under high pressure collector III is equipped with nozzle with the front end of water under high pressure collector IV, and rear end is connected with water system.
The surface of the downward-sloping sensing top roll of nozzle of water under high pressure collector I of the present invention and water under high pressure collector II.
Water under high pressure collector III of the present invention and the nozzles inclined upwards of water under high pressure collector IV point to the surface of lower roll.
The water collector frame of upper cleaning device of the present invention is equipped with water fender near the side of top roll.
The current that nozzle of the present invention sprays are coniform injection.
Use procedure of the present invention is:
First according to the size adjustment water under high pressure collector nozzle of roller diameter and the distance of roller surface, this work is advanced by the flexible drive cleaning device of cylinder or is retreated; Opening gear motor drive unit while opening water system drives running gear along fixed cross beam reciprocating (along roll axis direction), and breaker roll carries out bath cleaning.
Advantage of the present invention is apparent, is mainly manifested in:
1, use of the present invention, solves because zinc-plated dust is attached to roller surface, on follow-up band steel, is affected the problem of strip surface quality by coining again;
2, use of the present invention, solves existing cleaning roller surface dust and uses scraper or grinding wheel head structure, the problem that cleaning effect is not good;
3, running gear of the present invention can the track on fixed cross beam be walked, and cleaning plant is moved back and forth along roller central line, realizes the whole roll surface of cleaning;
4, high-pressure water jet collector of the present invention is arranged in the sliding sleeve on running gear, by air cylinder driven, can make high-pressure water jet collector near and away from roll, to adapt to the needs in differential roller footpath, can cleaning performance be ensured;
5, high-pressure water jet collector head of the present invention installs nozzle, water under high pressure is sprayed by cone shape, can clean out the dust on roll thoroughly;
6, upper cleaning device of the present invention adds water fender, after preventing high pressure water washing rod face, splash is returned in cleaning device, pollutes cleaning device.
The present invention has novel structure, process easy, easy to use, clear thoroughly, operating efficiency is high, ensure that belt steel surface cleans, ensure the advantages such as product quality, it puts goods on the market in enormous quantities and will produce positive social benefit and significant economic benefit.
Accompanying drawing explanation
The present invention has 2 width accompanying drawings, wherein:
Accompanying drawing 1 structural representation of the present invention;
Accompanying drawing 2 A-A view of the present invention.
In the drawings: 1, installing rack on gear motor drive unit 2, nozzle 3, water under high pressure collector I 4, water collector frame 5, N-type vehicle frame 6, wheel 7, directive wheel 8,9, upper fixed cross beam 10, sliding sleeve I 11, water fender 12, cylinder 13, water under high pressure collector II 14, frame 15, water under high pressure collector III 16, sliding sleeve II 17, lower fixed cross beam 18, lower installing rack 19, water under high pressure collector IV.
Detailed description of the invention
As shown in drawings, roll cleaning device comprises topping roll cleaning plant and bottom roll cleaning plant to specific embodiments of the invention; Topping roll cleaning plant and bottom roll cleaning plant are loaded on top and the bottom of the inner side port of export of frame 14 respectively;
Described topping roll cleaning plant comprises cleaning device, upper running gear, upper fixed cross beam 9 and gear motor drive unit 1; Upper fixed cross beam 9 is assemblied in port of export top inside frame 14; Upper running gear is loaded on the track of fixed cross beam 9, and upper cleaning device is loaded on running gear, and reciprocating on upper fixed cross beam 9 with upper running gear; Gear motor drive unit 1 is loaded on fixed cross beam 9 edge, and is connected with upper running gear;
Upper running gear comprises N-type vehicle frame 5, wheel 6, directive wheel 7 and upper installing rack 8; Wheel 6 and directive wheel 7 are equipped with in N-type vehicle frame 5 inside, and wheel 6 is loaded in the track of fixed cross beam 9, and directive wheel 7 contacts with the both sides of upper fixed cross beam 9, and the traffic direction of directive wheel 7 to upper running gear plays guide effect; Upper installing rack 8 is loaded on N-type vehicle frame 5, and the lower inclined plane of upper installing rack 8 is equipped with sliding sleeve I 10; N-type vehicle frame 5 is connected with gear motor drive unit 1;
Upper cleaning device comprises water under high pressure collector I 3, water under high pressure collector II 13, nozzle 2, water collector frame 4 and cylinder 12; Water collector frame 4 is L-type structure; Water under high pressure collector I 3 is L-type mechanism, is loaded on the outside of water collector frame 4, and water under high pressure collector II 13 is straight pipe type, is loaded on one end of water collector frame 4, and is sleeved in sliding sleeve I 10; Water under high pressure collector I 3 and water under high pressure collector II 13 form a U-shaped structure; Cylinder 12 is loaded on the lower inclined plane of installing rack 4, and its piston rod is connected with water under high pressure collector II 13 by connecting rod; Water under high pressure collector I 3 is equipped with nozzle 2 with the front end of water under high pressure collector II 13, and rear end is connected with water system;
Described bottom roll cleaning plant comprises lower cleaning device, lower running gear, lower fixed cross beam 17 and gear motor drive unit 1; Lower fixed cross beam 17 is assemblied in port of export bottom inside frame 14; Lower running gear is loaded on the track of lower fixed cross beam 17, and lower cleaning device is loaded on lower running gear, and reciprocating on lower fixed cross beam 17 with lower running gear; Gear motor drive unit 1 is loaded on lower fixed cross beam 17 edge, and is connected with lower running gear;
Lower running gear comprises N-type vehicle frame 5, wheel 6, directive wheel 7 and lower installing rack 18; Wheel 6 and directive wheel 7 are equipped with in N-type vehicle frame 5 inside, and wheel 6 is loaded in the track of lower fixed cross beam 17, and directive wheel 7 contacts with the both sides of lower fixed cross beam 17, and the traffic direction of directive wheel 7 to lower running gear plays guide effect; Lower installing rack 18 is loaded on N-type vehicle frame 5, and the ramp of lower installing rack 18 is equipped with sliding sleeve II 16; N-type vehicle frame 5 is connected with gear motor drive unit 1;
Lower cleaning device comprises water under high pressure collector III 15, water under high pressure collector IV 19, nozzle 2, water collector frame 4 and cylinder 12; Water collector frame 4 is inverted L shape structure; Water under high pressure collector IV 19 is L-type mechanism, is loaded on the outside of water collector frame 4, and water under high pressure collector III 15 is straight pipe type, is loaded on one end of water collector frame 4, and is sleeved in sliding sleeve II 16; Water under high pressure collector III 15 and water under high pressure collector IV 19 form a U-shaped structure; Cylinder 12 is loaded on the ramp of lower installing rack 18, and its piston rod is connected with water under high pressure collector III 15 by connecting rod; Water under high pressure collector III 15 is equipped with nozzle 2 with the front end of water under high pressure collector IV 19, and rear end is connected with water system.
The surface of the downward-sloping sensing top roll of nozzle 2 of water under high pressure collector I 3 and water under high pressure collector II 13.
Water under high pressure collector III 15 is inclined upwardly with the nozzle 2 of water under high pressure collector IV 19 and points to the surface of lower roll.
The water collector frame of upper cleaning device is equipped with water fender 11 near the side of top roll.
The current that nozzle 2 sprays are coniform injection.
The above; be only preferably detailed description of the invention of the present invention; but protection scope of the present invention is not limited thereto; allly be familiar with those skilled in the art in technical scope disclosed by the invention, be equal to replace or change according to technical scheme of the present invention and design of the present invention thereof and all should be encompassed within protection scope of the present invention.
Claims (5)
1. a roll cleaning device; It is characterized in that described roll cleaning device comprises topping roll cleaning plant and bottom roll cleaning plant; Topping roll cleaning plant and bottom roll cleaning plant are loaded on top and the bottom of the inner side port of export of frame (14) respectively;
Described topping roll cleaning plant comprises cleaning device, upper running gear, upper fixed cross beam (9) and gear motor drive unit (1); Upper fixed cross beam (9) is assemblied in port of export top, frame (14) inner side; Upper running gear is loaded on the track of fixed cross beam (9), and upper cleaning device is loaded on running gear, and upper reciprocating at upper fixed cross beam (9) with upper running gear; Gear motor drive unit (1) is loaded on fixed cross beam (9) edge, and is connected with upper running gear;
Described upper running gear comprises N-type vehicle frame (5), wheel (6), directive wheel (7) and upper installing rack (8); Wheel (6) and directive wheel (7) are equipped with in N-type vehicle frame (5) inside, wheel (6) is loaded in the track of fixed cross beam (9), directive wheel (7) contacts with the both sides of upper fixed cross beam (9), and directive wheel (7) traffic direction to upper running gear plays guide effect; Upper installing rack (8) is loaded on N-type vehicle frame (5), and the lower inclined plane of upper installing rack (8) is equipped with sliding sleeve I (10); N-type vehicle frame (5) is connected with gear motor drive unit (1);
Described upper cleaning device comprises water under high pressure collector I (3), water under high pressure collector II (13), nozzle (2), water collector frame (4) and cylinder (12); Water collector frame (4) is L-type structure; Water under high pressure collector I (3) is L-type mechanism, be loaded on the outside of water collector frame (4), water under high pressure collector II (13) is straight pipe type, is loaded on one end of water collector frame (4), and is sleeved in sliding sleeve I (10); Water under high pressure collector I (3) and water under high pressure collector II (13) form a U-shaped structure; Cylinder (12) is loaded on the lower inclined plane of installing rack (4), and its piston rod is connected with water under high pressure collector II (13) by connecting rod; Water under high pressure collector I (3) is equipped with nozzle (2) with the front end of water under high pressure collector II (13), and rear end is connected with water system;
Described bottom roll cleaning plant comprises lower cleaning device, lower running gear, lower fixed cross beam (17) gear motor drive unit (1); Lower fixed cross beam (17) is assemblied in port of export bottom, frame (14) inner side; Lower running gear is loaded on the track of lower fixed cross beam (17), and lower cleaning device is loaded on lower running gear, and upper reciprocating at lower fixed cross beam (17) with lower running gear; Gear motor drive unit (1) is loaded on lower fixed cross beam (17) edge, and is connected with lower running gear;
Described lower running gear comprises N-type vehicle frame (5), wheel (6), directive wheel (7) and lower installing rack (18); Wheel (6) and directive wheel (7) are equipped with in N-type vehicle frame (5) inside, wheel (6) is loaded in the track of lower fixed cross beam (17), directive wheel (7) contacts with the both sides of lower fixed cross beam (17), and directive wheel (7) traffic direction to lower running gear plays guide effect; Lower installing rack (18) is loaded on N-type vehicle frame (5), and the ramp of lower installing rack (18) is equipped with sliding sleeve II (16); N-type vehicle frame (5) is connected with gear motor drive unit (1);
Described lower cleaning device comprises water under high pressure collector III (15), water under high pressure collector IV (19), nozzle (2), water collector frame (4) and cylinder (12); Water collector frame (4) is inverted L shape structure; Water under high pressure collector IV (19) is L-type mechanism, be loaded on the outside of water collector frame (4), water under high pressure collector III (15) is straight pipe type, is loaded on one end of water collector frame (4), and is sleeved in sliding sleeve II (16); Water under high pressure collector III (15) and water under high pressure collector IV (19) form a U-shaped structure; Cylinder (12) is loaded on the ramp of lower installing rack (18), and its piston rod is connected with water under high pressure collector III (15) by connecting rod; Water under high pressure collector III (15) is equipped with nozzle (2) with the front end of water under high pressure collector IV (19), and rear end is connected with water system.
2. roll cleaning device according to claim 1, is characterized in that described water under high pressure collector I (3) and the surface of the downward-sloping sensing top roll of nozzle (2) of water under high pressure collector II (13).
3. roll cleaning device according to claim 1, is characterized in that described water under high pressure collector III (15) is inclined upwardly with the nozzle (2) of water under high pressure collector IV (19) and points to the surface of lower roll.
4. roll cleaning device according to claim 1, is characterized in that the water collector frame of described upper cleaning device is equipped with water fender (11) near the side of top roll.
5. roll cleaning device according to claim 1, is characterized in that the current that described nozzle (2) sprays are coniform injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850375.7A CN104550092A (en) | 2014-12-29 | 2014-12-29 | Roller cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850375.7A CN104550092A (en) | 2014-12-29 | 2014-12-29 | Roller cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104550092A true CN104550092A (en) | 2015-04-29 |
Family
ID=53067772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410850375.7A Pending CN104550092A (en) | 2014-12-29 | 2014-12-29 | Roller cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104550092A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107639056A (en) * | 2016-07-22 | 2018-01-30 | 宝山钢铁股份有限公司 | A kind of cleaning device for being used to clean roll surface |
| CN107887567A (en) * | 2016-09-29 | 2018-04-06 | 深圳市比亚迪锂电池有限公司 | A kind of roll-in system for making high-energy-density electrokinetic cell and cleaning device of pressing roller |
| CN110538879A (en) * | 2019-08-30 | 2019-12-06 | 攀钢集团攀枝花钢钒有限公司 | control method for automatic roller washing of cold-rolled roller |
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| JPS5522434A (en) * | 1978-08-04 | 1980-02-18 | Hitachi Ltd | Water draining method of rolling mill |
| US6309472B1 (en) * | 1998-10-20 | 2001-10-30 | Bwg Bergwerk-Und Walzwerk-Maschinenbau Gmbh | Method of and apparatus for cleaning strip line rolls |
| CN201164852Y (en) * | 2007-12-29 | 2008-12-17 | 中冶南方工程技术有限公司 | High pressure water cleaner for galvanizing unit complete machine work roll |
| CN102343339A (en) * | 2011-10-19 | 2012-02-08 | 首钢总公司 | Method and device for eliminating spiral roll marks on steel strip surface finishing machine |
| CN203140437U (en) * | 2013-01-08 | 2013-08-21 | 上海东新冶金技术工程有限公司 | Washing device for cold-rolling strip steel hot galvanizing unit finishing rolling mill work roll surfaces |
| CN203508593U (en) * | 2013-09-23 | 2014-04-02 | 武汉钢铁(集团)公司 | Supporting device used for high-pressure cleaning trolley |
| CN204365638U (en) * | 2014-12-29 | 2015-06-03 | 一重集团大连设计研究院有限公司 | Roll cleaning device |
-
2014
- 2014-12-29 CN CN201410850375.7A patent/CN104550092A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5522434A (en) * | 1978-08-04 | 1980-02-18 | Hitachi Ltd | Water draining method of rolling mill |
| US6309472B1 (en) * | 1998-10-20 | 2001-10-30 | Bwg Bergwerk-Und Walzwerk-Maschinenbau Gmbh | Method of and apparatus for cleaning strip line rolls |
| CN201164852Y (en) * | 2007-12-29 | 2008-12-17 | 中冶南方工程技术有限公司 | High pressure water cleaner for galvanizing unit complete machine work roll |
| CN102343339A (en) * | 2011-10-19 | 2012-02-08 | 首钢总公司 | Method and device for eliminating spiral roll marks on steel strip surface finishing machine |
| CN203140437U (en) * | 2013-01-08 | 2013-08-21 | 上海东新冶金技术工程有限公司 | Washing device for cold-rolling strip steel hot galvanizing unit finishing rolling mill work roll surfaces |
| CN203508593U (en) * | 2013-09-23 | 2014-04-02 | 武汉钢铁(集团)公司 | Supporting device used for high-pressure cleaning trolley |
| CN204365638U (en) * | 2014-12-29 | 2015-06-03 | 一重集团大连设计研究院有限公司 | Roll cleaning device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107639056A (en) * | 2016-07-22 | 2018-01-30 | 宝山钢铁股份有限公司 | A kind of cleaning device for being used to clean roll surface |
| CN107887567A (en) * | 2016-09-29 | 2018-04-06 | 深圳市比亚迪锂电池有限公司 | A kind of roll-in system for making high-energy-density electrokinetic cell and cleaning device of pressing roller |
| CN110538879A (en) * | 2019-08-30 | 2019-12-06 | 攀钢集团攀枝花钢钒有限公司 | control method for automatic roller washing of cold-rolled roller |
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Application publication date: 20150429 |