CN112823942B - Lower guide plate device of roughing mill - Google Patents
Lower guide plate device of roughing mill Download PDFInfo
- Publication number
- CN112823942B CN112823942B CN201911140440.6A CN201911140440A CN112823942B CN 112823942 B CN112823942 B CN 112823942B CN 201911140440 A CN201911140440 A CN 201911140440A CN 112823942 B CN112823942 B CN 112823942B
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- Prior art keywords
- guide plate
- lower guide
- roller
- plate
- frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/14—Guiding, positioning or aligning work
- B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
- B21B39/165—Guides or guide rollers for rods, bars, rounds, tubes ; Aligning guides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a lower guide plate device of a roughing mill, which comprises a lower guide plate, a rotating shaft, a hydraulic cylinder, a frame roller guide plate and a frame roller, wherein the lower guide plate is arranged on the lower guide plate; the lower guide plate is fixed on the memorial archway through the rotating shaft, and the hydraulic cylinder drives the rotating shaft to enable the lower guide plate to swing; the frame roller guide plate is fixedly connected to a bearing seat of the frame roller; the lower surface of the lower guide plate is provided with a bakelite water cutting plate, and the upper surface of the lower guide plate is provided with a wear-resistant layer; the lower guide plate is connected with the rack roller guide plate through a rectangular tooth type structure. The invention ensures that the slab buckle head cannot impact the gap between the guide plate and the frame roller guide plate, and avoids the problems of deformation and cracking of the frame roller guide plate, jamming of the frame roller and damage to the roller surface of the roller due to cooling water cooling to the friction roller between the slab and the guide plate.
Description
Technical Field
The invention relates to steel rolling roughing mill equipment in the field of metallurgy, in particular to a lower guide plate device of a roughing mill.
Background
The roughing mill is the key equipment on the hot rolling strip steel production line, and the roughing mill is generally equipped with two roughing mills in the present roughing mill region, and first (R1) is the reversible or irreversible rolling mill of two rolls, and second (R2) is the reversible rolling mill of four rolls, and the roll export all sets up upper and lower guide guard, and its effect mainly is: the transition effect of the head and the tail of the slab during rolling and the cooling water of the roller are not sprayed on the slab during rolling, so that the water retaining effect is realized, and the temperature drop of the slab is reduced. At present, the difference of the structural forms of the lower guide and guard plate of the inlet and outlet of the rough mill at home and abroad is large, and the two types of the lower guide and guard plate are typical, wherein one type is the lower guide and guard plate directly fixed on a roller bearing seat, and the other type is a swinging type lower guide and guard plate.
As shown in fig. 1 and 2, the swing type lower guide plate 42 is fixed on a rotating shaft 52, the rotating shaft 52 is fixed on the housing, the rotating shaft 52 is driven by a hydraulic cylinder to rotate so as to swing the lower guide plate 42, and when the roller 12 needs to be drawn out, the rotating shaft 52 is driven by the hydraulic cylinder to rotate to a vertical position by the lower guide plate 42; after the roller is installed, the lower guide plate 42 is driven by a hydraulic cylinder to rotate the rotating shaft 52 to a horizontal position, and the gap between the lower guide plate 42 and the roller surface of the roller 12 is ensured to be within 1-3 mm, so that the water retaining function is realized. The frame roller guide 32 is fixed directly to the bearing housing of the frame roller 22.
There is the clearance between lower guide and guard plate 42 and the frame roller baffle 32 in rolling process, easily receives the percussion slab and strikes repeatedly, appears warping and then leads to the trouble of the dead frame roller of card, and can lead to frame roller 22 slide wedge not hard up, and the bearing frame is fixed not firm, and body fracture, bearing damage trouble influence production efficiency.
During rolling, the lower guide plate 42 is in a horizontal position, and the gap between the lower guide plate 42 and the roll surface of the roll 12 needs to be ensured within 1-3 mm. However, since the gap between the lower guide plate 42 and the roll surface of the roll 12 can only be controlled manually, the gap is too large or too small, the too large gap can cause cooling water to pass through the gap and be cooled to a plate blank, and the too small gap can cause the lower guide plate 42 to rub the roll, so that the roll surface of the roll 12 is damaged.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a lower guide plate device of a roughing mill, which ensures that a plate blank cannot collide into a gap between the lower guide plate and a roller guide plate of a rack when the head of the plate blank is buckled, prevents cooling water from cooling the plate blank and the lower guide plate to rub a roller, and avoids the problems of deformation and cracking of the roller guide plate of the rack, jamming of the roller of the rack, damage of the roller surface of the roller and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a lower guide plate device of a roughing mill comprises a lower guide plate, a rotating shaft, a hydraulic cylinder, a frame roller guide plate and a frame roller;
the lower guide plate is fixed on the memorial archway through the rotating shaft, and the hydraulic cylinder drives the rotating shaft to enable the lower guide plate to swing;
the frame roller guide plate is directly and fixedly connected to a bearing seat of the frame roller;
the lower surface of the lower guide plate is additionally provided with a bakelite water cutting plate, and the upper surface of the lower guide plate is additionally provided with a wear-resistant layer; the lower guide plate is connected with the rack roller guide plate through a rectangular tooth type structure.
The structure of the rectangular teeth is as follows: the roller guide plate of the machine frame is characterized in that the guide plate part of the machine frame roller at the position connected with the lower guide plate is lengthened in size, the guide plate part of the machine frame roller and the lower guide plate at the position connected with the lower guide plate are arranged to be rectangular convex-concave teeth, the convex teeth on the guide plate of the machine frame roller correspond to the concave teeth of the lower guide plate, and the concave teeth on the guide plate of the machine frame roller correspond to the convex teeth of the lower guide plate to form cross lapping.
The bakelite water cutting plate is connected to the lower surface of the lower guide plate through a plurality of bolts, and preferably, the bolts are in an M16 × 50 specification.
The wearing layer is additionally arranged on the upper surface of the lower guide plate in a surfacing mode, and the thickness of the wearing layer is 5mm.
According to the lower guide and guard plate device of the roughing mill, provided by the invention, the rack roller guide plate and the inlet and outlet lower guide and guard plate are designed into rectangular tooth structures, and are in cross lap joint transition, so that a gap between the lower guide and guard plate and a roller surface is eliminated, a plate blank can smoothly pass through, and equipment faults caused by the collision of the head of the plate blank on the rack roller guide plate and the inlet lower guide and guard plate are effectively avoided. The lower guide plate directly contacts the roller through the bakelite water cutting plate, so that the temperature of the plate blank can be effectively prevented from being influenced by spraying cooling water on the plate blank, and the surface damage of the roller caused by the friction of the lower guide plate on the roller can be avoided. The wear-resistant layer is additionally arranged on the surface of the lower guide plate, so that the wear resistance and the corrosion resistance of the surface of the lower guide plate are greatly improved, and the service life of the lower guide plate is prolonged.
Drawings
FIG. 1 is a schematic view of a roughing mill lower guard assembly according to the prior art;
FIG. 2 is a top view of the device of FIG. 1;
FIG. 3 is a schematic view of a roughing mill lower guard assembly according to the present invention;
FIG. 4 is a top view of the device shown in FIG. 3;
FIG. 5 is a schematic view of the installation of the bakelite water cutting board in the lower guide and guard assembly of the roughing mill of the present invention;
fig. 6 is a cross-sectional view showing the installation of the bakelite water cutting board in the lower guide and guard assembly of the roughing mill of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 3 to 6, the lower guide plate structure of the present invention includes a lower guide plate 43, a rotating shaft 52, a housing, a hydraulic cylinder, a frame roller guide 33, and a frame roller 22.
The lower guide plate 43 is fixed on the rotating shaft 52, the rotating shaft 52 is fixed on the memorial archway, the hydraulic cylinder drives the rotating shaft to swing the lower guide plate, and the hydraulic cylinder drives the rotating shaft 52 to rotate so as to swing the lower guide plate 43. The frame roller guide 33 is directly fixed to the bearing housing of the frame roller 22, which is part of the prior art and will not be described further here. Different from the prior art, the lower surface of the lower guide and guard plate 43 is connected with a bakelite water cutting plate 6 through a bolt 8, the upper surface of the lower guide and guard plate 43 is connected with a wear-resistant layer through surfacing, and the lower guide and guard plate 43 is connected with the rack roller guide plate 33 through a rectangular tooth structure.
Preferably, the rectangular tooth structure is illustrated in fig. 3 and 4, taking the roll entry side as an example: the right end portion of the frame roller guide plate 33 and the left end portion of the inlet lower guide 43 are both elongated in size and designed in a rectangular tooth configuration, i.e., the frame roller guide plate portion and the lower guide plate portion at the position where the frame roller guide plate 33 and the lower guide 43 are connected are elongated in size and are provided in a rectangular concavo-convex tooth shape. Therefore, the rectangular concave-convex toothed convex teeth on the rack roller guide plate 33 correspond to the rectangular concave-convex toothed concave teeth on the lower guide plate 43, and the rectangular concave-convex toothed concave teeth on the rack roller guide plate 33 correspond to the rectangular concave-convex toothed convex teeth on the lower guide plate 43, so that the cross transition of the rack roller guide plate 33 and the inlet lower guide plate 43 is realized, a slab can pass through smoothly, and equipment faults caused by the impact of the head of the slab on the rack roller guide plate 33 and the lower guide plate 43 are effectively avoided.
Preferably, the upper surface of the lower guide plate 43 (i.e., the portion in contact with the slab) is subjected to stainless steel bead welding to form a wear-resistant layer on the upper surface of the lower guide plate 43. The lower guide plate 43 is made of ZG270-500 cast steel, and the wear-resistant layer is made of 1Cr13 and has the thickness of 5mm. The wear resistance and corrosion resistance of the surface of the lower guide plate 43 can be greatly improved through the wear-resistant layer arranged on the lower guide plate, and the service life of the lower guide plate 43 is prolonged.
Preferably, a bakelite water cutting plate 6 with the thickness of 20mm is additionally arranged on the lower surface of the lower guide plate 43, and the bakelite water cutting plate 6 is fixed on the lower surface of the lower guide plate 43 through 9 bolts with the specification of M16 × 50. Because the lower surface is provided with the bakelite water cutting plate, the lower guide plate 43 can directly contact the surface of the roller 12 through the bakelite water cutting plate 6, the original 1-3 mm gap is eliminated, the cooling water is effectively prevented from being directly sprayed onto the plate blank through the gap, the temperature control of the plate blank is influenced, and the surface damage caused by the direct friction of the lower guide plate 43 on the roller 12 is also avoided. .
The use method of the lower guide plate device of the roughing mill comprises the following steps: step one, realizing cross transition of a rack roller guide plate and inlet and outlet lower guide plates;
the roller guide plate of the frame and the lower guide plate of the inlet and outlet are designed into rectangular tooth structures, and the rectangular tooth structures are crossed and overlapped for transition, so that the gap between the lower guide plate and the roller surface of the roller is eliminated.
Step two, the wear resistance of the surface of the lower guide plate is increased;
the stainless steel surfacing welding is carried out on the upper surface (the contact part with the plate blank) of the lower guide plate, so that the wear resistance and the corrosion resistance of the surface of the lower guide plate are improved, and the service life of the lower guide plate is prolonged.
And step three, installing a bakelite water cutting plate 6 below the end part of the lower guide plate.
The lower surface of the lower guide plate is additionally provided with the bakelite water cutting plate, so that the lower guide plate directly contacts the roller through the bakelite water cutting plate, and the original clearance of 1-3 mm is eliminated, thereby not only effectively preventing cooling water from being sprayed on the plate blank to influence the temperature control of the plate blank, but also avoiding the lower guide plate from rubbing the roller to cause the surface damage of the roller.
And step four, after the roller is installed, the hydraulic cylinder drives the rotating shaft to rotate all the time to enable the water cutting plate on the lower guide plate to be attached to the roller.
The structure of the lower guide plate device of the original roughing mill needs to control the gap between the lower guide plate and the roll surface of the roll within 1-3 mm, so that an operator needs to adjust the gap after the roll is installed and lock the stroke of the hydraulic cylinder. The structure of the lower guide plate device of the roughing mill ensures that the lower guide plate device can be tightly attached to the roller after the bakelite water cutting plate is worn, so that a hydraulic cylinder can be always in a working state after the roller is installed.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that the changes and modifications of the above embodiments are within the scope of the claims of the present invention as long as they are within the spirit of the present invention.
Claims (2)
1. A lower guide plate device of a roughing mill comprises a lower guide plate, a rotating shaft, a hydraulic cylinder, a frame roller guide plate and a frame roller;
the lower guide plate is fixed on the memorial archway through the rotating shaft, and the hydraulic cylinder drives the rotating shaft to enable the lower guide plate to swing;
the frame roller guide plate is fixedly connected to a bearing seat of the frame roller;
the method is characterized in that: the lower surface of the lower guide plate is provided with a bakelite water cutting plate, and the upper surface of the lower guide plate is provided with a wear-resistant layer; the lower guide plate is connected with the roller guide plate of the frame through a rectangular tooth structure,
the structure of the rectangular teeth is as follows: the sizes of the parts of the rack roller guide plate and the lower guide plate at the connecting position of the rack roller guide plate and the lower guide plate are lengthened, the parts of the rack roller guide plate and the lower guide plate at the connecting position are arranged into rectangular convex-concave teeth, the convex teeth on the rack roller guide plate correspond to the concave teeth of the lower guide plate, the concave teeth on the rack roller guide plate correspond to the convex teeth of the lower guide plate to form cross lap joint,
the bakelite water cutting plate is connected to the lower surface of the lower guide plate through a plurality of bolts,
the wear-resistant layer is arranged on the upper surface of the lower guide plate in a surfacing mode.
2. The roughing mill lower guard apparatus of claim 1 wherein: the thickness of the wear-resistant layer is 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911140440.6A CN112823942B (en) | 2019-11-20 | 2019-11-20 | Lower guide plate device of roughing mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911140440.6A CN112823942B (en) | 2019-11-20 | 2019-11-20 | Lower guide plate device of roughing mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112823942A CN112823942A (en) | 2021-05-21 |
| CN112823942B true CN112823942B (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911140440.6A Active CN112823942B (en) | 2019-11-20 | 2019-11-20 | Lower guide plate device of roughing mill |
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| CN (1) | CN112823942B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201150939Y (en) * | 2007-11-22 | 2008-11-19 | 中国第一重型机械集团公司 | No-impact hydraulic cylinder guide plate lifting device |
| CN201264039Y (en) * | 2008-09-24 | 2009-07-01 | 扬州诚德钢管有限公司 | Device for rapidly replacing guide plate rack on large-caliber perforating machine |
| CN201791724U (en) * | 2010-09-21 | 2011-04-13 | 宝山钢铁股份有限公司 | Guide cut water device for hot-rolling roll |
| CN102581021B (en) * | 2012-03-01 | 2013-10-02 | 重庆钢铁(集团)有限责任公司 | Maintenance method for frame roller of roughing mill |
| CN204365723U (en) * | 2014-11-27 | 2015-06-03 | 上海梅山钢铁股份有限公司 | Reversable mill crash-proof guide and guards |
| KR102028873B1 (en) * | 2015-04-27 | 2019-11-04 | 한상관 | Nature friendly water quality clarifier and electricity generation system |
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- 2019-11-20 CN CN201911140440.6A patent/CN112823942B/en active Active
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| CN112823942A (en) | 2021-05-21 |
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