CN102335677A - Quick replacement device and replacement method for stand roller of heavy plate mill - Google Patents
Quick replacement device and replacement method for stand roller of heavy plate mill Download PDFInfo
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- CN102335677A CN102335677A CN2010102353847A CN201010235384A CN102335677A CN 102335677 A CN102335677 A CN 102335677A CN 2010102353847 A CN2010102353847 A CN 2010102353847A CN 201010235384 A CN201010235384 A CN 201010235384A CN 102335677 A CN102335677 A CN 102335677A
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Abstract
The invention discloses a quick replacement device and a replacement method for a stand roller of a heavy plate mill. The device comprises a stand guide plate, wherein the stand guide plate is provided with four holes; the upper parts of the holes on the stand guide plate are provided with oblique cushion blocks with threaded holes; the oblique cushion blocks are also provided with sealing cover plates; the oblique cushion blocks and the stand guide plate are integrally designed; four lifting rods are arranged in the four holes respectively; and each lifting rod is positioned between two adjacent stand rollers below the lifting rod and is clamped. After each stand roller is integrally driven by the lifting rod to lift, a steel plate is placed below the lifting rod, then the stand roller is dropped, the lifting rod is disassembled, and finally the stand roller is stably moved out of the mill by using the steel plate, so that the problem of complex steps of moving the stand roller out of a mill housing window existing in the prior art is solved, time is saved, the operation for replacing the lifting rod is easy, the labor intensity is low; and the quick replacement device and the replacement method for the stand roller of the heavy plate mill are particularly suitable for the field of replacement of the large-sized stand roller of the heavy plate mill.
Description
Technical field
The present invention relates to the mill stand structure; The installation of roll, roller base or frame, adjusting or replacing field relate in particular to a kind of replacing field that is applied to the large-scale breast roll of heavy plate mill.
Background technology
At present the heavy plate mill of each tame steel production enterprise comprises on the roughing mill of continuous hot-rolling mill and all is designed with the breast roll device, and the main application of roll mill is to be used for conveying, output and the support of rolled plate to milling train, and its position is positioned at milling train inside; This place receives water, vapour oxidation and the iron scale that produces is a lot; Also bearing high temperature in addition, shock loading, the working condition of frequent rotating; So roll mill must regularly replace maintenance, to keep the operate as normal of whole rolling equipment.
Replacing method under the prior art is: the roll surface of roll mill is fixed on the milling train guide plate with steel wire rope; Utilize the guide plate lift cylinder, roll mill is promoted, cooperate the lifting of breast roll in the bottom of roll mill with hydraulic jack; When roll mill rises to certain altitude again with the center of chain block with roll mill translation rolling-mill housing window; Utilize roll change buggy that roll mill is shifted out milling train, and heavily about 50 tons of the breast roll of present most of milling train use this replacing method to cause replacing speed slow; Efficient is low, and steel wire rope ruptures accidents caused easily.
Application number 99232166.2, the Chinese patent of on 07 22nd, 1999 applying date, a kind of heavy plate mill is prone to more remodel breast roll.It is that three breast rolls of the every side of milling train are divided into two groups, leans on the roller of interior two one group of roll to use a solid housing, through the bolt of being with the wedge that ends button to add taper liner plate and hydraulic pressure strainer the breast roll bearing block is fastened in the ad hoc pedestal of memorial archway.To have two pairs of wheeled more changing devices of pivoted arm by the roller dolly that changes jobs and push window, utilize the guide and guard backplate roller of slinging, and stretch pivoted arm roller is rolled into window center, pull out by the roller dolly that changes jobs again.
It is firm reliable that this patent has type of belt drive, convenient processing and installation, dismounting easily, operating rate such as greatly improves at advantage.But this breast roll device replacing method also has some unsatisfactory places need improve and further improve, and its outstanding shortcoming is: with two pairs of pivoted arm wheels breast roll is rolled into the milling train window center, by the roller dolly that changes jobs breast roll is pulled out; Cause changing loaded down with trivial details; Unreliable, in practical operation, changing a suite of racks roller needs 3 days time, also consumes great amount of manpower; Working strength is big, and this replacing method can't satisfy the demand of high rhythm production of slab and end maintenance cost.
Publication number CN200981077, the Chinese patent in open day on November 28th, 2007, a kind of device of changing roll mill; It comprises structural framing, hanging apparatus composition; Be characterized in that framework adopts the pin formula to be connected with the breast roll bearing housing, hanging apparatus and framework connect; Framework is provided with pin-and-hole, and pivot pin is through in framework pin-and-hole and the breast roll bearing housing connection holes.
This patent has adopted special-purpose pin-and-hole formula to connect; The connecting pore that cooperates the breast roll bearing housing; Re-use handling apparatus, but the employed milling train of this patent is more small-sized milling train, and the problem that the present invention faced is heavily about 50 tons heavy plate mill breast roll; The pin-and-hole formula connects can not bear this weight, does not have a comparativity so compare with the present invention.
Publication number CN101670370, open day on 03 17th, 2010 Chinese patent, a kind of breast roll changing device belongs to the steel rolling equipment technical field.This device comprises support, wheel shaft, wheel, wheel gland and copper sheathing; Wherein wheel is installed as one through copper sheathing and wheel shaft, and wheel is respectively flat wheel or V shaped wheel according to the shape of slideway, has guaranteed the direction in the traveling process of dolly.
The advantage of this patent is, can be good at alleviating the coordination pressure of field apparatus in the breast roll changing, can be under the situation that does not influence other hydraulic systems maintenance, and breast roll changing is carried out in safe, quick, labour-saving.But the similar same existence of this patent and above-mentioned patent can't be applied to the replacing occasion of heavy plate mill breast roll owing to the problem of deadweight and jacking capacity.
So need a kind of more changing device that can be applied to the heavy plate mill breast roll at present, this device must be able to solve the unreasonable of existing breast roll changing method, and can shorten the replacing time, reduces maintenance cost.
Summary of the invention
In order to address the above problem; The invention provides a kind of heavy plate mill breast roll quick replacement device and replacing method; Through improving structure and parameters optimization; Utilize 4 special hole on the guide plate, 4 lifting arms are installed are connected, utilize the guide plate lift cylinder that roll mill is promoted certain altitude with breast roll.With a special-purpose steel plate penetrate breast roll below, on steel plate, put the V-type cushion block well, guide plate is fallen; The breast roll roll surface is placed on the V-type cushion block; Moving steel plate shifts out milling train stably with breast roll, with driving breast roll is hung, and time process of assembling is opposite with demolishing process.Concrete structure of the present invention is described below:
A kind of heavy plate mill breast roll quick replacement device and replacing method comprise the frame guide plate, it is characterized in that:
Described frame guide plate is provided with 4 holes, and 4 lifting arms then are arranged at respectively in 4 holes;
The place, top that is positioned at the frame guide plate of described hole is provided with the taper liner piece that is threaded the hole, also is provided with seal cover board on this taper liner piece, and taper liner piece and frame guide plate are the integral type design.
The taper liner piece at this place is provided with seal cover board, and its purpose is to prevent on the steel plate below cooling water is wandered from the hole when normal steel rolling is produced.
According to a kind of heavy plate mill breast roll quick replacement device of the present invention and replacing method; It is characterized in that; 4 holes that are provided with on the described frame guide plate; The center of roller spacing of two adjacent breast rolls of its below is all aimed at the center of its each hole, and the big or small position of the screwed hole on the taper liner piece is also corresponding with hole, promptly equals to be arranged at lifting arm in the hole and lays respectively between two adjacent breast rolls below it and with it and block.
The hole of the screwed hole of taper liner piece and frame guide plate is orthoscopic design, adds taper liner piece and frame guide plate itself also for integral type designs, and makes that the lifting arm position of inserting wherein is accurate, promotes effective.
According to a kind of heavy plate mill breast roll quick replacement device of the present invention and replacing method, it is characterized in that described 4 lifting arms are arranged at respectively in 4 holes; This lifting arm comprises lift block at the bottom of bar head nut, shaft and the bar, and it is specially each shaft and is positioned at each hole, and shaft top is threaded; After inserting the screwed hole of taper liner piece; Use the bar head nut to be spun on shaft top and locate and be fixed in the taper liner piece, promptly equal whole shaft is fixed in the hole of the frame guide plate that is communicated with the screwed hole of taper liner piece, lift block then is positioned at the shaft bottom at the bottom of the bar; And place between the roller spacing of two breast rolls; Lift block is a circular arc platform shape at the bottom of the bar, and the circular arc radian is identical with the breast roll radian, and the circular arc platform convex source bottom of lift block is greater than the roller spacing of breast roll at the bottom of the bar.
This design is in the time must not changing breast roll; Keep original frame guide plate operate as normal that has the taper liner piece of seal cover board to get final product; As changing breast roll, need only remove seal cover board, the shaft of lifting arm is inserted the screwed hole of taper liner piece; Its top is screwed in the bar head nut to be fixed; The arc end of lift block contacts with the roll surface of two adjacent breast rolls respectively at the bottom of the bar of its underpart circular arc platform shape, because lift block circular arc platform convex source is greater than the roller spacing of breast roll at the bottom of the bar, need only just can promote operation with breast roll by the lift carriage guide plate this moment.
According to a kind of heavy plate mill breast roll quick replacement device of the present invention and replacing method, its method step is described below:
1) when changing roll mill, earlier the pressing plate of fixed frame roller to be removed, universal drive shaft that is connected with breast roll and thin oil lubricant oil pipe are all removed;
2) upwards the top is loose with breast roll to use hydraulic jack then; The guide plate lift cylinder is fallen, drive the milling train guide plate and fall on the roll surface of breast roll, remove the seal cover board on the taper liner piece; The screwed hole of lifting arm being inserted the taper liner piece also feeds in the hole on the milling train guide plate that is communicated with it; Screw the upper boom head nut, should note the bar of shaft lower end this moment at the bottom of lift block should block between two the adjacent breast rolls in below, can not become flexible;
3) then the notifying operation worker unclamps the operation of the locking cylinder on the guide plate lift cylinder; Operation hand-operated direction valve action bars on the hydraulic valve platform, control guide plate lift cylinder promotes, and drives the oil cylinder hanging feet that is connected with the guide plate lift cylinder connected milling train guide plate is risen; The breast roll that promptly also will block through the lifting arm on the milling train guide plate simultaneously promotes in the lump; When breast roll rises to certain altitude,, pass the lower surface of breast roll with a steel plate translation; Between the lower surface of breast roll and steel plate upper surface, filled up the V-type cushion block, can simultaneously fill up adjusting cushion block in order to adjust highly also this moment;
4) operation guide plate lift cylinder falls to the milling train guide plate on the V-type cushion block, the bar head nut on the lifting arm is unclamped again, and removes whole lifting arm; Operating the guide plate lift cylinder once more rises the milling train guide plate; This moment, breast roll broke away from the milling train guide plate, last translation steel plate, and the breast roll that will be positioned at simultaneously on the steel plate shifts out milling train stably; With driving breast roll is hung, so far change and finish.
Use a kind of heavy plate mill breast roll quick replacement device of the present invention and replacing method, obtain following beneficial effect:
1. heavy plate mill breast roll quick replacement device of the present invention and replacing method make the roll mill replacing time shorten to 22 hours by original 3 day time;
2. heavy plate mill breast roll quick replacement device of the present invention and replacing method, it changes the simple to operate of special-purpose lifting arm, and labour intensity reduces greatly.
Description of drawings
Fig. 1 is use steel wire rope and the replacing roll mill sketch map of chain block formula under the prior art;
Concrete structure sketch map when Fig. 2 is the work of heavy plate mill breast roll quick replacement device of the present invention and replacing method;
Fig. 3 is the sketch map of roll being placed on the V-type cushion block of heavy plate mill breast roll quick replacement device of the present invention and replacing method when shifting out milling train with steel plate;
Fig. 4 is the lifting arm concrete structure sketch map of heavy plate mill breast roll quick replacement device of the present invention and replacing method.
Among the figure: 1-frame guide plate, 2-hole, 3-lifting arm, 3A-bar head nut; The 3B-shaft, lift block at the bottom of the 3C-bar, 4-screwed hole, 5-taper liner piece; The 6-seal cover board, 7-breast roll, 8-hydraulic jack, 9-guide plate lift cylinder; 10-oil cylinder hanging feet, the 11-steel plate, 12-V type cushion block, 13-regulates cushion block.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment heavy plate mill breast roll quick replacement device of the present invention and replacing method are done further explanation.
Embodiment
The device of heavy plate mill breast roll quick replacement device of the present invention and replacing method part is as follows:
Extremely shown in Figure 4 like Fig. 2:
1. preliminary preparation: at first will on milling train guide plate 1, process 4 special-purpose holes 2; The center of the roller spacing of two breast rolls 7 that the center in hole is necessary adjacent with the below is consistent; And above the hole of milling train guide plate, make and weld a taper liner piece 5; On the taper liner piece, be processed with screwed hole 4, and dismountable seal cover board 6 is installed;
Then design and produce 4 special-purpose lifting arms 3; Should note here; The shaft 3B top of lifting arm is threaded, and behind the screwed hole 4 of insertion taper liner piece 5, uses bar head nut 3 to be spun on shaft top and locates and be fixed in the taper liner piece; Promptly equal whole shaft is fixed in the hole of the frame guide plate that is communicated with the screwed hole of taper liner piece; Lift block then is positioned at the shaft bottom at the bottom of the bar, and places between the roller spacing of two breast rolls, and lift block is a circular arc platform shape at the bottom of the bar; The circular arc radian is identical with the breast roll radian, and the circular arc platform convex source bottom of lift block is greater than the roller spacing of breast roll at the bottom of the bar.
Also need steel plate 11 and 4 V-type cushion blocks 12 and some adjusting cushion blocks 13 of moving frame roller 7 usefulness in addition.
2. hydraulics: the hydraulic system that connects guide plate lift cylinder 9 must be in normal operating conditions, and hydraulic control valve must be normal.
3. electric condition: the electrical control program must be in normal operating conditions.
The method step of heavy plate mill breast roll quick replacement device of the present invention and replacing method is following:
Like Fig. 2 to (seal cover board 6 among Fig. 3 is merely position signal, in the replacing process, does not exist) shown in Figure 4:
1) when changing roll mill, earlier the pressing plate of fixed frame roller to be removed, universal drive shaft that is connected with breast roll and thin oil lubricant oil pipe are all removed;
2) upwards the top is loose with breast roll 7 to use hydraulic jack 8 then; Guide plate lift cylinder 9 is fallen, drive milling train guide plate 1 and fall on the roll surface of breast roll, remove the seal cover board 6 on the taper liner piece 5; The screwed hole 4 of lifting arm 3 being inserted the taper liner piece also feeds in the hole 2 on the milling train guide plate that is communicated with it; Screw upper boom head nut 3A, should note the bar of shaft 3B lower end this moment at the bottom of lift block 3C should block between two the adjacent breast rolls in below, can not become flexible;
3) then the notifying operation worker unclamps the operation of the locking cylinder on the guide plate lift cylinder 9; Operation hand-operated direction valve action bars on the hydraulic valve platform, control guide plate lift cylinder promotes, and drives the oil cylinder hanging feet 10 that is connected with the guide plate lift cylinder connected milling train guide plate is risen; Promptly also will promote in the lump simultaneously through the breast roll that the lifting arm on the milling train guide plate 3 blocks; When breast roll rises to certain altitude,, pass the lower surface of breast roll with a steel plate 11 translations; Between the lower surface of breast roll and steel plate upper surface, filled up V-type cushion block 12, can simultaneously fill up adjusting cushion block 13 in order to adjust highly also this moment;
4) operation guide plate lift cylinder 9 falls to milling train guide plate 1 on the V-type cushion block 12, the bar head nut 3A on the lifting arm 3 is unclamped again, and removes whole lifting arm; Operate the guide plate lift cylinder once more the milling train guide plate is risen, this moment, breast roll broke away from the milling train guide plate, last translation steel plate 11; The breast roll that will be positioned at simultaneously on the steel plate shifts out milling train stably; With driving breast roll is hung, so far change and finish, get final product on the contrary and return dress work and more change jobs.
Heavy plate mill breast roll quick replacement device of the present invention and replacing method have been cancelled original in loaded down with trivial details instruments such as steel wire rope and chain blocks; Because of utilizing long steel plate that breast roll is steadily shifted out milling train; Cancelled original specific purpose tool shifts out breast roll from mill housing window loaded down with trivial details step; Practiced thrift the time greatly; And change the simple to operate of special-purpose lifting arm, labour intensity reduces greatly, and heavy plate mill breast roll quick replacement device of the present invention and replacing method are particularly useful for the replacing field of the large-scale breast roll of heavy plate mill.
Claims (4)
1. heavy plate mill breast roll quick replacement device and replacing method comprise frame guide plate (1), it is characterized in that:
Described frame guide plate (1) is provided with 4 holes (2), and 4 lifting arms (3) then are arranged at respectively in 4 holes;
The place, top that is positioned at frame guide plate (1) of described hole (2) is provided with the taper liner piece (5) that is threaded hole (4), also is provided with seal cover board (6) on this taper liner piece, and taper liner piece and frame guide plate (1) are the integral type design.
2. a kind of heavy plate mill breast roll quick replacement device as claimed in claim 1 and replacing method; It is characterized in that; Described frame guide plate (1) is gone up 4 holes (2) that are provided with; The center of roller spacing of two adjacent breast rolls (7) of its below is all aimed at the center of its each hole, and the big or small position of the screwed hole (4) on the taper liner piece (5) is also corresponding with hole, promptly equals to be arranged at lifting arm (3) in the hole and lays respectively between two adjacent breast rolls below it and with it and block.
3. a kind of heavy plate mill breast roll quick replacement device as claimed in claim 1 and replacing method; It is characterized in that described 4 lifting arms (3) are arranged at respectively in 4 holes (2), this lifting arm (3) comprises lift block (3C) at the bottom of bar head nut (3A), shaft (3B) and the bar; It is specially each shaft and is positioned at each hole; Shaft top is threaded, and behind the screwed hole (4) of insertion taper liner piece (5), uses the bar head nut to be spun on shaft top and locates and be fixed in the taper liner piece; Promptly equal whole shaft is fixed in the hole of the frame guide plate (1) that is communicated with the screwed hole of taper liner piece; Lift block then is positioned at the shaft bottom at the bottom of the bar, and places between the roller spacing of two breast rolls, and lift block is a circular arc platform shape at the bottom of the bar; The circular arc radian is identical with the breast roll radian, and the circular arc platform convex source bottom of lift block is greater than the roller spacing of breast roll at the bottom of the bar.
4. heavy plate mill breast roll quick replacement device and replacing method, its method step is described below:
1) when changing roll mill, earlier the pressing plate of fixed frame roller to be removed, universal drive shaft that is connected with breast roll and thin oil lubricant oil pipe are all removed;
2) upwards the top is loose with breast roll (7) to use hydraulic jack (8) then; Guide plate lift cylinder (9) is fallen; Driving milling train guide plate (1) falls on the roll surface of breast roll; Remove the seal cover board (6) on the taper liner piece (5), the screwed hole (4) of lifting arm (3) being inserted the taper liner piece also feeds in the hole (2) on the milling train guide plate that is communicated with it, screws upper boom head nut (3A); Lift block (3C) should block between two the adjacent breast rolls in below at the bottom of should noting the bar of shaft (3B) lower end this moment, can not become flexible;
3) then the notifying operation worker unclamps the operation of the locking cylinder on the guide plate lift cylinder (9); Operation hand-operated direction valve action bars on the hydraulic valve platform, control guide plate lift cylinder promotes, and drives the oil cylinder hanging feet (10) that is connected with the guide plate lift cylinder connected milling train guide plate is risen; Promptly also will promote in the lump simultaneously through the breast roll that block the lifting arm on the milling train guide plate (3); When breast roll rises to certain altitude,, pass the lower surface of breast roll with a steel plate (11) translation; Between the lower surface of breast roll and steel plate upper surface, filled up V-type cushion block (12), can simultaneously fill up adjusting cushion block (13) in order to adjust highly also this moment;
4) operation guide plate lift cylinder (9) falls to milling train guide plate (1) on the V-type cushion block (12), the bar head nut (3A) on the lifting arm (3) is unclamped again, and removes whole lifting arm; Operating the guide plate lift cylinder once more rises the milling train guide plate; This moment, breast roll broke away from the milling train guide plate, last translation steel plate (11), and the breast roll that will be positioned at simultaneously on the steel plate shifts out milling train stably; With driving breast roll is hung, so far change and finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102353847A CN102335677A (en) | 2010-07-23 | 2010-07-23 | Quick replacement device and replacement method for stand roller of heavy plate mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102353847A CN102335677A (en) | 2010-07-23 | 2010-07-23 | Quick replacement device and replacement method for stand roller of heavy plate mill |
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| CN102335677A true CN102335677A (en) | 2012-02-01 |
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| CN2010102353847A Pending CN102335677A (en) | 2010-07-23 | 2010-07-23 | Quick replacement device and replacement method for stand roller of heavy plate mill |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103331332A (en) * | 2013-04-28 | 2013-10-02 | 上海宝冶集团有限公司 | Quick replacing method of upper roll box of cold straightener of wide and thick plate factory |
| CN103341494A (en) * | 2013-06-11 | 2013-10-09 | 鞍钢股份有限公司 | Continuous annealing line deviation rectifying upper roller dismounting method |
| CN106424149A (en) * | 2016-11-26 | 2017-02-22 | 湖南华菱湘潭钢铁有限公司 | Wide and heavy plate mill breast roll replacing device and method |
| CN107282644A (en) * | 2016-04-04 | 2017-10-24 | 鞍钢股份有限公司 | Method for processing broken rolls in finish rolling |
| CN107986148A (en) * | 2017-12-20 | 2018-05-04 | 中国二冶集团有限公司 | Dismount the auxiliary device and construction method of roughing mill breast roll |
| CN112705572A (en) * | 2019-10-25 | 2021-04-27 | 普锐特冶金技术日本有限公司 | Rolling mill and rolling method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038956A (en) * | 1988-06-30 | 1990-01-24 | 丹尼利机械厂联合股票公司 | In the mill stand of roll, be used for changing the device of complete roll and relevant device with cantilevered fulcrum |
| CN1214969A (en) * | 1996-04-19 | 1999-04-28 | 丹尼利机械设备股份公司 | Device to replace rolls in four-high rolling stand for sheet and/or wide plate |
| CN2399125Y (en) * | 1999-07-22 | 2000-10-04 | 中国第二重型机械集团公司 | Easy-to-replace breast roller of thick plate rolling mill |
| CN101456036A (en) * | 2008-12-30 | 2009-06-17 | 二重集团（德阳）重型装备股份有限公司 | Breast-roll set replacement method and hoisting clamp thereof |
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2010
- 2010-07-23 CN CN2010102353847A patent/CN102335677A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038956A (en) * | 1988-06-30 | 1990-01-24 | 丹尼利机械厂联合股票公司 | In the mill stand of roll, be used for changing the device of complete roll and relevant device with cantilevered fulcrum |
| CN1214969A (en) * | 1996-04-19 | 1999-04-28 | 丹尼利机械设备股份公司 | Device to replace rolls in four-high rolling stand for sheet and/or wide plate |
| CN2399125Y (en) * | 1999-07-22 | 2000-10-04 | 中国第二重型机械集团公司 | Easy-to-replace breast roller of thick plate rolling mill |
| CN101456036A (en) * | 2008-12-30 | 2009-06-17 | 二重集团（德阳）重型装备股份有限公司 | Breast-roll set replacement method and hoisting clamp thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103331332A (en) * | 2013-04-28 | 2013-10-02 | 上海宝冶集团有限公司 | Quick replacing method of upper roll box of cold straightener of wide and thick plate factory |
| CN103341494A (en) * | 2013-06-11 | 2013-10-09 | 鞍钢股份有限公司 | Continuous annealing line deviation rectifying upper roller dismounting method |
| CN107282644A (en) * | 2016-04-04 | 2017-10-24 | 鞍钢股份有限公司 | Method for processing broken rolls in finish rolling |
| CN106424149A (en) * | 2016-11-26 | 2017-02-22 | 湖南华菱湘潭钢铁有限公司 | Wide and heavy plate mill breast roll replacing device and method |
| CN107986148A (en) * | 2017-12-20 | 2018-05-04 | 中国二冶集团有限公司 | Dismount the auxiliary device and construction method of roughing mill breast roll |
| CN112705572A (en) * | 2019-10-25 | 2021-04-27 | 普锐特冶金技术日本有限公司 | Rolling mill and rolling method |
| CN112705572B (en) * | 2019-10-25 | 2022-12-23 | 普锐特冶金技术日本有限公司 | Rolling mill and rolling method |
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Application publication date: 20120201 |