CN110773481A - Roller surface treatment device for rolling mill - Google Patents
Roller surface treatment device for rolling mill Download PDFInfo
- Publication number
- CN110773481A CN110773481A CN201911207800.XA CN201911207800A CN110773481A CN 110773481 A CN110773481 A CN 110773481A CN 201911207800 A CN201911207800 A CN 201911207800A CN 110773481 A CN110773481 A CN 110773481A
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- CN
- China
- Prior art keywords
- wall
- plate
- rolling mill
- surface treatment
- fixing
- 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.)
- Withdrawn
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 29
- 238000004381 surface treatment Methods 0.000 title claims abstract description 21
- 238000004140 cleaning Methods 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000002893 slag Substances 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005381 potential energy Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 238000005246 galvanizing Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a roller surface treatment device for a rolling mill, which comprises a bottom plate, wherein a rectangular groove is formed in the middle position of the outer wall of the top of the bottom plate, the inner walls of two sides of the rectangular groove are in a quarter arc shape, first springs are arranged on two sides of the outer wall of the top of the bottom plate, a placing plate is arranged on the outer walls of the tops of the two first springs, a fixing strip is arranged on the outer wall of one side of the placing plate, a strip-shaped groove is formed in one side of the outer wall of the top of the bottom plate, a sliding block is connected to the inner wall of the bottom of the strip-shaped groove in a sliding mode, a positioning hole is formed in the outer wall of one side of the sliding block, and a. The invention can prevent the supporting block from being damaged due to collision between the supporting block and the rectangular groove, can prevent the device from being incapable of working due to insufficient power, can improve the environmental protection property of the device, and can prevent the roller from being damaged due to falling off from the fixed sleeve due to infirm fixation.
Description
Technical Field
The invention relates to the technical field of rolling mills, in particular to a roller surface treatment device for a rolling mill.
Background
At present, rollers are important parts on a rolling mill in a steel rolling mill, rolled and rolled steel by using pressure generated when a pair or a group of rollers roll, galvanized dust is always attached to the surfaces of strip steel due to the fact that the front part of a unit carries out galvanizing processing on the strip steel, the dust is attached to the rollers of the rolling mill when the strip steel passes through the rolling mill, and along with subsequent rolling, the galvanized dust attached to the rollers can be printed on the subsequent strip steel again and generates clear indentation to influence the surface quality of the strip steel.
Through search, the patent with the Chinese patent authorization number of CN204365638U discloses a roller surface cleaning device of a temper mill in a cold rolling hot galvanizing unit. The device is characterized in that the roller cleaning device comprises an upper roller cleaning device and a lower roller cleaning device; the upper roller cleaning device and the lower roller cleaning device are respectively arranged at the upper part and the lower part of the outlet end at the inner side of the frame, and the upper roller cleaning device comprises an upper cleaning device, an upper walking device, an upper fixed cross beam and a gear motor driving device. The above patents suffer from the following disadvantages: 1. when the roller is cleaned, although the surface of the roller can be cleaned through water washing, water stains can corrode the surface of the roller, so that the surface of the roller is easy to rust, and in addition, the water stains on the roller can leave stains on the surface of the roller after being dried, so that the roller cannot be cleaned cleanly; 2. when the roller is washed by water, a large amount of water resources are wasted, and the environment protection of the device is not facilitated; 3. when the surface of the roller is cleaned, the roller needs to be fixed, and the surface of the roller is smooth, so that the roller is easy to fall off from the device and is damaged.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a roller surface treatment device for a rolling mill.
In order to achieve the purpose, the invention adopts the following technical scheme:
a roller surface treatment device for a rolling mill comprises a bottom plate, wherein a rectangular groove is formed in the middle position of the outer wall of the top of the bottom plate, the inner walls of two sides of the rectangular groove are in a quarter arc shape, first springs are arranged on two sides of the outer wall of the top of the bottom plate, placing plates are arranged on the outer walls of the tops of the two first springs, a fixing strip is arranged on the outer wall of one side of each placing plate, a strip-shaped groove is formed in one side of the outer wall of the top of the bottom plate, a sliding block is connected to the inner wall of the bottom of the strip-shaped groove in a sliding mode, a positioning hole is formed in the outer wall of one side of the sliding block, supporting plates are arranged on the middle position of the outer wall of the top of the sliding block and one side of the outer wall of the top of the bottom plate, grooves are formed in the positions, close to the tops, of the outer walls, one the outer wall of axis of rotation is provided with the gear, one the top outer wall of backup pad all is provided with the roof, and the both sides of roof bottom outer wall all are provided with the hydraulic stem, two the bottom outer wall of hydraulic stem all has the connecting plate through bolted connection, and the top outer wall of connecting plate has the steel brush through bolted connection.
Furthermore, the position that the bottom outer wall of placing the board is located the centre is provided with the supporting shoe, and the cross section of supporting shoe is the semicircle, contacts between the bottom outer wall of supporting shoe and the rectangular channel.
Further, the top outer wall of the placing plate is provided with a fixing frame, the inner walls of the two sides of the fixing frame are connected with a cleaning plate through bolts, the outer wall of the cleaning plate is provided with slag inlets distributed equidistantly, the top outer wall of the cleaning plate is provided with fixed teeth distributed equidistantly, and the cleaning plate is wavy.
Furthermore, threaded holes are formed in two sides of the outer wall of the top of each of the two fixing sleeves, and fixing bolts are connected to the inner wall of each threaded hole in a threaded mode.
Furthermore, fixing bolt's bottom outer wall threaded connection has the clamping piece, and the bottom outer wall of clamping piece is provided with the slipmat, and the bottom outer wall of slipmat and the bottom inner wall of fixed cover all are provided with the lug, and the position that the top outer wall of clamping piece is located the centre and the position that the top inner wall of fixed cover is located the centre all are provided with the second spring.
Furthermore, a feed inlet is formed in the position, close to the middle, of the outer wall of one side of the supporting plate, a feed plate is arranged on the inner wall of the bottom of the feed inlet, and the height of the feed plate is higher than that of the fixing frame.
Furthermore, the outer wall of one side of the bottom plate is provided with limit holes distributed at equal intervals, and the inner wall of each limit hole is inserted with a positioning pin.
Furthermore, a fixing plate is arranged on one side of the outer wall of the top of the bottom plate, and a sliding groove is formed in the outer wall of one side of the fixing plate.
Furthermore, the inner wall sliding connection of spout has the draw runner, and the outer wall of draw runner is kept away from one side of spout and is provided with the rack, meshes between rack and the gear, welds between fixed strip and the rack.
The invention has the beneficial effects that:
1. through the clearance board that sets up, advance the cinder notch and fixed tooth, can increase the frictional force between roll and the clearance board to in tentatively clear up the impurity on roll surface, the rolling speed of roll can be slowed down to wavy clearance board, so that fixed tooth clears up the surface of roll, prevents because the rolling speed of roll leads to impurity can not be by the clean up too fast.
2. Through rectangular channel, supporting shoe and the first spring that sets up for the device can be cleared up the roll through making a round trip to rock, and the cross section of supporting shoe sets up to the power of shaking that semi-circular can increase the clearance board, and the inner wall of rectangular channel sets to the quarter arc and can prevent that the supporting shoe from receiving the damage with the bumping messenger of rectangular channel.
3. Through the feeding plate and the feeding hole which are arranged, the device can convert gravitational potential energy of the roller into kinetic potential energy when feeding, so that power is conveniently improved for the supporting block to shake, and the device is prevented from being incapable of working due to insufficient power.
4. Through the board, fixed strip, rack and the gear of placing that set up, can drive the axis of rotation through rocking of placing the board and rotate and make the axis of rotation drive roll rotation to the steel brush of being convenient for clears up the surface of roll, improves the feature of environmental protection of device.
5. Through the fixing bolt, the clamping piece and the lug that set up, can increase the frictional force between roll and the fixed cover to fix the roll, prevent to drop from fixing to sheathe in and leading to the roll to receive the damage because fixed not firm roll.
Drawings
FIG. 1 is a schematic cross-sectional view of a roll surface treatment apparatus for a rolling mill according to the present invention;
FIG. 2 is a partially enlarged schematic structural view of a roll surface treatment apparatus for a rolling mill according to the present invention;
FIG. 3 is a schematic view of the structure of the fixing sleeve of the roll surface treatment device for a rolling mill according to the present invention;
FIG. 4 is a partial structural view of a roll surface treatment apparatus for a rolling mill according to the present invention;
FIG. 5 is a partial structural view of a base plate of a roll surface treatment apparatus for a rolling mill according to the present invention.
In the figure: 1-bottom plate, 2-rectangular groove, 3-supporting block, 4-placing plate, 5-first spring, 6-fixing plate, 7-sliding groove, 8-fixing strip, 9-rack, 10-supporting plate, 11-rotating shaft, 12-gear, 13-top plate, 14-hydraulic rod, 15-connecting plate, 16-steel wire brush and 17-fixing sleeve, 18-feed inlet, 19-feed plate, 20-fixed frame, 21-slide block, 22-positioning hole, 23-cleaning plate, 24-fixed tooth, 25-slag inlet, 26-lug, 27-non-slip mat, 28-clamping piece, 29-fixing bolt, 30-second spring, 31-slide bar, 32-positioning pin and 33-limiting hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, a roller surface treatment device for a rolling mill comprises a base plate 1, a rectangular groove 2 is formed in the middle position of the outer wall of the top of the base plate 1, the inner walls of the two sides of the rectangular groove 2 are quarter arcs and can prevent the device from colliding with the inner wall of the rectangular groove, first springs 5 are welded on the two sides of the outer wall of the top of the base plate 1, placing plates 4 are welded on the outer walls of the tops of the two first springs 5, fixing strips 8 are welded on the outer wall of one side of each placing plate 4, a strip-shaped groove is formed in one side of the outer wall of the top of the base plate 1, a sliding block 21 is connected to the inner wall of the bottom of the strip-shaped groove in a sliding manner, a positioning hole 22 is formed in the outer wall of one side of the sliding block 21, supporting plates 10 are connected to the middle position of the outer wall of the, and the bearing has all been welded to the inner wall of two recesses, the inner wall of two bearings all rotates and is connected with axis of rotation 11, and there is fixed cover 17 one side of backup pad 10 is kept away from to the outer wall of two axis of rotation 11 through bolted connection, the outer wall welding of an axis of rotation 11 has gear 12, the top outer wall of a backup pad 10 all has roof 13 through bolted connection, and the both sides of roof 13 bottom outer wall all have hydraulic stem 14 through bolted connection, the bottom outer wall of two hydraulic stem 14 all has connecting plate 15 through bolted connection, and there is steel brush 16 top outer wall of connecting plate 15 through bolted connection.
Wherein, the position that the bottom outer wall of placing board 4 is located the centre has supporting shoe 3 through bolted connection, and the cross section of supporting shoe 3 is the semicircle, and the contact can increase the power of shaking of placing board 4 between the bottom outer wall of supporting shoe 3 and rectangular channel 2 to in clearing up the roll.
Wherein, the top outer wall of placing board 4 has mount 20 through bolted connection, and the both sides inner wall of mount 20 all has cleaning plate 23 through bolted connection, cleaning plate 23's outer wall is opened has the slag inlet 25 that the equidistance distributes, cleaning plate 23's top outer wall welding has the fixed tooth 24 that the equidistance distributes, can increase the frictional force between roll and the cleaning plate 23, so that fixed tooth 24 tentatively clears up the surface of roll, cleaning plate 23 is the wave, can slow down the roll speed of roll, so that tentatively clear up the surface of roll.
Wherein, threaded holes are arranged on both sides of the outer wall of the top of the two fixed sleeves 17, and the inner wall of each threaded hole is connected with a fixed bolt 29 in a threaded manner.
Wherein, the bottom outer wall threaded connection of fixing bolt 29 has clamping piece 28, and the bottom outer wall of clamping piece 28 has slipmat 27 through bolted connection, the bottom outer wall of slipmat 27 and the bottom inner wall of fixed cover 17 all are provided with lug 26, can increase the frictional force between roll and the fixed cover 17, so that fix the roll, prevent that the roll from droing from fixed cover 17 and damaging the roll, the position that the top outer wall of clamping piece 28 is located the centre and the position that the top inner wall of fixed cover 17 is located the centre all welds and have second spring 30.
Wherein, the position that one side outer wall of backup pad 10 is close to the centre is opened has feed inlet 18, and there is feed plate 19 bottom inner wall of feed inlet 18 through bolted connection, and feed plate 19 highly is higher than the height of mount 20, can change the gravitational potential energy of roll into power potential energy in the feeding to for the work of device provides power, prevent because power is not enough to lead to the device can't work.
Wherein, the outer wall of one side of bottom plate 1 is opened and is had the spacing hole 33 that the equidistance distributes, and the inner wall of spacing hole 33 pegs graft and have locating pin 32.
Wherein, one side of the outer wall of the top of the bottom plate 1 is connected with a fixing plate 6 through a bolt, and the outer wall of one side of the fixing plate 6 is provided with a sliding chute 7.
Wherein, the inner wall sliding connection of spout 7 has draw runner 31, and there is rack 9 one side of spout 7 is kept away from to the outer wall of draw runner 31 through bolted connection, meshes between rack 9 and the gear 12, welds between fixed strip 8 and the rack 9.
When the device is used, the distance between the supporting plates 10 is adjusted through the positioning pins 32 and the sliding blocks 21 according to the length of the roller, after the adjustment is completed, the roller to be cleaned is placed on the feeding plate 19 and is rolled onto the cleaning plate 23, the fixing frame 20 starts to shake due to the gravity of the roller, so that the roller shakes on the cleaning plate 23, residues on the surface of the roller are preliminarily cleaned through the fixing teeth 24, the preliminarily cleaned roller is inserted into the inner wall of the fixing sleeve 17 at two ends of the roller, the roller is fixed through the fixing bolts 29, the friction force between the roller and the fixing sleeve 17 is increased through the convex blocks 26, the roller is prevented from falling off from the inside of the fixing sleeve 17, after the fixing is completed, the other roller to be cleaned is placed on the feeding plate 19, the roller can roll onto the roller cleaning plate 23 from the feeding plate 19, and shakes on the cleaning plate 23, so that the placing plate 4 drives the rack 9 to move downwards, and the rotating shaft 11 drives the roller to rotate back and forth through the meshing between the rack 9 and the gear 12, so that the steel brush 16 further cleans the surface of the roller.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A roller surface treatment device for a rolling mill comprises a bottom plate (1) and is characterized in that a rectangular groove (2) is formed in the middle position of the outer wall of the top of the bottom plate (1), the inner walls of the two sides of the rectangular groove (2) are in a quarter arc shape, first springs (5) are arranged on the two sides of the outer wall of the top of the bottom plate (1), a placing plate (4) is arranged on the outer wall of the top of each first spring (5), a fixing strip (8) is arranged on the outer wall of one side of the placing plate (4), a strip-shaped groove is formed in one side of the outer wall of the top of the bottom plate (1), a sliding block (21) is connected to the inner wall of the bottom of the strip-shaped groove in a sliding mode, a positioning hole (22) is formed in the outer wall of one side of the sliding block (21), a supporting plate (10) is arranged in the, and the position that the outer wall of one side of two backup pads (10) is close to the top all opens flutedly, and the inner wall of two recesses all is provided with the bearing, two the inner wall of bearing all rotates and is connected with axis of rotation (11), and the outer wall of two axis of rotation (11) keep away from one side of backup pad (10) and be provided with fixed cover (17), one the outer wall of axis of rotation (11) is provided with gear (12), one the top outer wall of backup pad (10) all is provided with roof (13), and the both sides of roof (13) bottom outer wall all are provided with hydraulic stem (14), two the bottom outer wall of hydraulic stem (14) all has connecting plate (15) through bolted connection, and the top outer wall of connecting plate (15) has steel brush (16).
2. The roll surface treatment apparatus for a rolling mill according to claim 1, wherein the support block (3) is provided at a position of the bottom outer wall of the mounting plate (4) in the middle, and the cross section of the support block (3) is a semicircle, and the bottom outer wall of the support block (3) is in contact with the rectangular groove (2).
3. The roll surface treatment device for the rolling mill according to claim 1, characterized in that the top outer wall of the placing plate (4) is provided with a fixed frame (20), the inner walls of the two sides of the fixed frame (20) are connected with a cleaning plate (23) through bolts, the outer wall of the cleaning plate (23) is provided with slag inlets (25) distributed at equal intervals, the top outer wall of the cleaning plate (23) is provided with fixed teeth (24) distributed at equal intervals, and the cleaning plate (23) is in a wave shape.
4. The roll surface treatment apparatus for a rolling mill according to claim 1, wherein both sides of the top outer wall of the two fixing sleeves (17) are provided with screw holes, and the inner wall of the screw hole is threadedly connected with a fixing bolt (29).
5. The roll surface treatment device for the rolling mill according to claim 4, characterized in that the bottom outer wall of the fixing bolt (29) is in threaded connection with the clamping piece (28), the bottom outer wall of the clamping piece (28) is provided with the anti-slip pad (27), the bottom outer wall of the anti-slip pad (27) and the bottom inner wall of the fixing sleeve (17) are both provided with the convex block (26), and the top outer wall of the clamping piece (28) and the top inner wall of the fixing sleeve (17) are both provided with the second spring (30).
6. The roll surface treatment device for the rolling mill according to claim 1, characterized in that a feed opening (18) is formed at a position close to the middle of the outer wall of one side of the support plate (10), and a feed plate (19) is arranged at the inner wall of the bottom of the feed opening (18), and the height of the feed plate (19) is higher than that of the fixing frame (20).
7. The roll surface treatment device for the rolling mill according to claim 1, characterized in that the outer wall of one side of the bottom plate (1) is provided with limit holes (33) which are distributed at equal intervals, and the inner wall of the limit hole (33) is inserted with a positioning pin (32).
8. The roll surface treatment device for the rolling mill according to claim 1, characterized in that a fixing plate (6) is provided on one side of the top outer wall of the bottom plate (1), and a sliding groove (7) is formed on the outer wall of one side of the fixing plate (6).
9. The roll surface treatment device for the rolling mill according to claim 8, characterized in that the inner wall of the sliding chute (7) is connected with a sliding strip (31) in a sliding manner, a rack (9) is arranged on one side of the outer wall of the sliding strip (31) far away from the sliding chute (7), the rack (9) is meshed with the gear (12), and the fixed strip (8) is welded with the rack (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911207800.XA CN110773481A (en) | 2019-11-30 | 2019-11-30 | Roller surface treatment device for rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911207800.XA CN110773481A (en) | 2019-11-30 | 2019-11-30 | Roller surface treatment device for rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110773481A true CN110773481A (en) | 2020-02-11 |
Family
ID=69393976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911207800.XA Withdrawn CN110773481A (en) | 2019-11-30 | 2019-11-30 | Roller surface treatment device for rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110773481A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112077355A (en) * | 2020-09-14 | 2020-12-15 | 电子科技大学中山学院 | Mechanical drilling device suitable for round bar material |
| CN112404603A (en) * | 2020-11-06 | 2021-02-26 | 山西辉煌腾达科技有限公司 | Oxide skin slag scraping device for cold roll processing and slag scraping method thereof |
-
2019
- 2019-11-30 CN CN201911207800.XA patent/CN110773481A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112077355A (en) * | 2020-09-14 | 2020-12-15 | 电子科技大学中山学院 | Mechanical drilling device suitable for round bar material |
| CN112404603A (en) * | 2020-11-06 | 2021-02-26 | 山西辉煌腾达科技有限公司 | Oxide skin slag scraping device for cold roll processing and slag scraping method thereof |
| CN112404603B (en) * | 2020-11-06 | 2022-07-19 | 安徽恒意硬面工程股份有限公司 | Oxide skin slag scraping device for cold roll processing and slag scraping method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200211 |
|
| WW01 | Invention patent application withdrawn after publication |