CN219880934U - Cold rolling mill with wear-resisting deflector roll of high bullet - Google Patents
Cold rolling mill with wear-resisting deflector roll of high bullet Download PDFInfo
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- CN219880934U CN219880934U CN202320104467.5U CN202320104467U CN219880934U CN 219880934 U CN219880934 U CN 219880934U CN 202320104467 U CN202320104467 U CN 202320104467U CN 219880934 U CN219880934 U CN 219880934U
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- 238000005097 cold rolling Methods 0.000 title claims abstract description 26
- 229920003225 polyurethane elastomer Polymers 0.000 claims abstract description 19
- 239000011247 coating layer Substances 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 8
- 230000001070 adhesive effect Effects 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 8
- 238000010073 coating (rubber) Methods 0.000 claims description 7
- 238000005538 encapsulation Methods 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 239000010731 rolling oil Substances 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- ZXHZWRZAWJVPIC-UHFFFAOYSA-N 1,2-diisocyanatonaphthalene Chemical compound C1=CC=CC2=C(N=C=O)C(N=C=O)=CC=C21 ZXHZWRZAWJVPIC-UHFFFAOYSA-N 0.000 description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 17
- 229910052782 aluminium Inorganic materials 0.000 description 17
- 229910052802 copper Inorganic materials 0.000 description 17
- 239000010949 copper Substances 0.000 description 17
- 238000005096 rolling process Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 230000020169 heat generation Effects 0.000 description 7
- 239000003921 oil Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000004992 fission Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- SBJCUZQNHOLYMD-UHFFFAOYSA-N 1,5-Naphthalene diisocyanate Chemical compound C1=CC=C2C(N=C=O)=CC=CC2=C1N=C=O SBJCUZQNHOLYMD-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 201000009240 nasopharyngitis Diseases 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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- Rolls And Other Rotary Bodies (AREA)
Abstract
The utility model discloses a cold rolling mill with high-elastic wear-resistant offset rollers, which comprises an inlet offset roller and an outlet offset roller, wherein an inlet flattening roller is arranged at the rear end of the inlet offset roller, a roller is arranged at the rear end of the inlet flattening roller, the rear end of the roller is provided with the outlet offset roller, the inlet offset roller and the outlet offset roller are offset rollers taking NDI type polyurethane elastomer as an adhesive coating layer; the requirements of the cold rolling mill on the use conditions of high temperature resistance, low endogenous heat rate, rolling oil resistance, cut resistance and abrasion resistance of the deflection roller are met; the deflection roller has high tearing strength, and the situation that the strip cuts the roller surface is avoided; the maintenance work of daily cleaning roller surfaces is reduced, the production efficiency is improved, and the continuous operation production is facilitated.
Description
Technical Field
The utility model belongs to the technical field of aluminum and copper plate strip cold rolling, and particularly relates to a cold rolling mill with high-elastic wear-resistant deflection rollers.
Background
Copper and aluminum are indispensable important materials in social production and human life, the consumption of the copper and aluminum is inferior to that of steel, and the aluminum and copper plate strips are widely applied to various fields of aviation, aerospace, electronics, electric power, information, energy, machinery, metallurgy, construction, traffic and the like. With the continuous progress of society and the rapid development of modern industry, the demand of various fields for aluminum and copper plate strips is continuously increased, and the requirements for high performance, high precision and high surface quality of aluminum and copper plate strips are also more and more strict, so that the technical content and production equipment level of aluminum and copper plate strip products are continuously improved. In particular, in the production of cold-rolled strip products which are of various types, small in quantity, high in strength and difficult to deform, the thickness of the cold-rolled strip product is very small, and when the thickness of the cold-rolled strip product is smaller than the elastic flattening value of deformation of the cold roller, the cold-rolled strip product cannot be produced by a common cold-rolling mill.
In the design of cold rolling mill equipment for aluminum and copper strips, the use condition of a deflection roller is bad: (1) The temperature of the strip is high, and the temperature of the strip at the inlet of the rolling mill is between 20 and 80 ℃; the temperature of the rolled strip is 80-120 ℃ when the strip is coiled, and the temperature of the strip is up to 140 ℃ due to special process requirements of certain special alloys; (2) The running speed of the strip is high and is 100-1800m/min, the frequency of alternating stress applied to the deflection guide roller is increased when the strip is run at high speed, and the internal heat generation rate is increased; (3) The deflection roller needs to resist kerosene, and in the rolling process, the roller needs to be cooled and lubricated by using rolling oil, so that a large amount of rolling oil is adhered to the surfaces of the strip before and after rolling; (4) The roll surface is cut by the flanging caused by the fission or the trimming of the strip edge, after part of aluminum alloy is rolled, the fission of the edge is serious, or the strip is required to be trimmed due to the process requirement, and the roll surface is easy to cut due to the fact that the strip edge is sheared and the flanging is performed under the strip edge; (5) Good wear resistance is required for the roll surfaces to increase their service life due to the high speed operation of the strip.
Based on the working conditions, the material of the roller surface of the inlet and outlet deflection roller of the cold rolling mill equipment is usually a heat treatment steel roller or a surface chromium plating process, and the method reduces the finish value of the roller surface, but because aluminum and copper materials are softer, the roller surface of the hard alloy slides between the strip and the roller surface in the process of threading or production, the surface of the strip is scratched, meanwhile, aluminum scraps, copper scraps and the like can be accumulated on the roller surface, the roller surface needs to be cleaned at irregular intervals along with the accumulation, the load of operators is increased, and uncontrollable risk factors are caused to products. In the prior art, a brush roller is generally arranged below the side of the deflection roller to clean the surface of the deflection roller, but the actual use effect is not ideal, the rolling reduction of the brush roller cannot be well controlled, the brush roller can only be cleaned in a shutdown state, the resistance of the brush roller is prevented from influencing the running speed of the deflection roller, and the problem cannot be fundamentally solved.
At present, a deflection roller with a steel roller surface is used in the technical field of cold rolling mills, and the steel roller surface can meet the requirements of most production working conditions, but the roller surface has high hardness, scratch on the surfaces of aluminum and copper strips cannot be avoided, and the production technical problems of scratch between a strip and the roller surface and accumulation of aluminum chips and copper chips on the roller surface cannot be fundamentally solved.
Disclosure of Invention
The utility model aims to solve the technical problems, and provides a cold rolling mill with high-elastic wear-resistant eccentric rollers, which adopts an eccentric roller encapsulated by using NDI polyurethane elastomer as a raw material, is applied to cold rolling mill equipment, meets the use condition requirements of the eccentric rollers on high temperature resistance, low endogenous heat rate, rolling oil resistance, cutting resistance and wear resistance, and solves the technical problem of scratch and scratch on the surface of a strip caused by the steel eccentric roller.
The technical scheme adopted by the utility model is as follows: the utility model provides a cold rolling mill with wear-resisting deflector roll of high bullet, includes entry deflector roll, export deflector roll, and the front end of entry deflector roll sets up the decoiler, and the rear end of entry deflector roll sets up the entry flattening roller, and the rear end of entry flattening roller sets up the roll, and the rear end of roll sets up the export deflector roll, and the rear end of export deflector roll is the coiler, and entry deflector roll and export deflector roll are the deflector roll that uses NDI type polyurethane elastomer as the rubber coating layer.
The roller comprises an upper supporting roller, a lower supporting roller, an upper working roller and a lower working roller, wherein the upper working roller is respectively contacted with the roller surfaces of the upper supporting roller and the lower working roller, and the lower working roller is contacted with the roller surface of the lower supporting roller.
The deflection roller comprises a roller core, the roller core is of a hollow cylindrical structure, threads are arranged on the outer surface of the roller core, an encapsulating layer is arranged on the periphery of the roller core, and the roller core and the encapsulating layer are embedded into a whole; the left end of the roller core is provided with a left shaft head, the right end of the left shaft head is inserted into the left cylindrical hollow of the roller core and welded and fixed with the left inner periphery of the roller core, and the left end of the left shaft head is provided with a key slot; the right end of the roller core is provided with a right shaft head, the left end of the right shaft head is inserted into the right cylindrical hollow of the roller core and welded and fixed with the right inner periphery of the roller core, and the inner walls of the two ends of the roller core are provided with steps to limit the positions of the left shaft head and the right shaft head inserted into the roller core.
The roller core is made of steel materials, and the rubber coating layer is made of NDI polyurethane elastomer.
The length of the deflection guide roller is 300-3000mm, the diameter of the deflection guide roller is 80-500mm, the temperature resistance of the deflection guide roller is 20-160 ℃, the thickness of the deflection guide roller adhesive coating layer can be adjusted according to the roller diameter, and the thickness of the adhesive coating layer is 5-30mm; the Shore hardness of the roller surface after encapsulation is 75-95; the load of the deflection roller is 1-100000N, and the rotating speed of the deflection roller is 0-1800m/min.
The working process of the cold rolling mill comprises the following steps: the method comprises the following steps of preparing before rolling, lifting materials, uncoiling, threading, rolling, unloading and the like, firstly checking whether a rolling mill and oil tanks leak oil or not, and whether all equipment operates normally or not, hanging coiled materials fed in the previous working procedure on a saddle by using a travelling crane, starting an uncoiler, sleeving a strip on a winding drum, uncoiling, pressing and rolling the strip on a strip coil, conveying a strip head to an inlet deflection roller along a guide plate, threading the strip after passing through the inlet flattening roller, rolling the strip after passing through the roller, conveying the rolled strip to an outlet deflection roller along the guide plate, starting a coiling machine, and coiling the strip.
The deflection roller comprises a roller core, the roller core is of a hollow cylindrical structure, threads are arranged on the outer surface of the roller core, an encapsulating layer is arranged on the periphery of the roller core, and the roller core and the encapsulating layer are embedded into a whole; the purpose of this arrangement is: the NDI type polyurethane elastomer is embedded and integrated outside the steel roller core, the NDI type polyurethane elastomer has excellent abrasion resistance, and can form an outer layer with higher strength and excellent abrasion resistance, so that the deflection roller has the advantages of high elasticity and high abrasion resistance, high-pressure load resistance, high abrasion resistance and high elastic restoring force, reduces the loss, allows the deformation of the outer layer to ensure the contact area of the deflection roller surface and aluminum and copper plate strips, simultaneously inhibits the reduction of friction coefficient, obtains the balance of the abrasion resistance and the friction coefficient of the deflection roller surface, prolongs the service life of the deflection roller, avoids scratch caused to the surfaces of the aluminum and copper plate strips due to the high hardness of the steel roller surface, fundamentally solves the production technical problems of scratch between the aluminum and copper plate strips and the deflection roller surface and accumulation of aluminum chips and copper chips, and is beneficial to continuous operation and chemical production.
The utility model has the beneficial effects that: the cold rolling mill is simple in structure and safe and reliable in performance, the structure of the deflection guide roller adopts the hollow cylindrical steel core outer surface rubber coating high-performance NDI type polyurethane elastomer, the head of the deflection guide roller can be designed according to interfaces with different use requirements, the thickness of the rubber coating layer can be adjusted according to the roller diameter, the external dimensions such as the length, the diameter and the like of the roller can be designed according to the requirements, the whole structure of the deflection guide roller is simple, the abrasion resistance of the deflection guide roller is excellent, and the abrasion is low; the deflection roller has extremely low internal heat generation rate due to the symmetry of the molecular structure of the deflection roller, and internal heat generation can not be accumulated in the alternating load, so that the high-temperature use condition of cold rolling mill equipment is met; the deflection roller has high tearing strength, and the situation that the strip cuts the roller surface is avoided; the maintenance work of daily cleaning roller surfaces is reduced, the production efficiency is improved, the technical problem in the production process is solved, and the continuous operation production is facilitated.
Drawings
FIG. 1 is a schematic view of an arrangement of cold rolling mill rolls of the present utility model;
FIG. 2 is a schematic view of the deflection roller structure of the present utility model;
FIG. 3 is a graph comparing the temperature rise curves of the deflection roller destructive test adhesive surface of the TDI and the adhesive layer of the polyurethane elastomer with NDI.
The marks in the figure: 1. An inlet deflector roll; 2. an inlet flattening roller; 3. a roller; 31. an upper work roll; 32. a lower work roll; 33. an upper support roller; 34. a lower support roller; 4. an outlet offset roller; 5. an uncoiler; 6. a coiling machine; 7. a roll core; 8. a glue coating layer; 9. a left shaft head; 10. and a right axle head.
Detailed Description
The following describes the embodiments of the present utility model in further detail with reference to the drawings.
As shown in the figure, the cold rolling mill with the high-elastic wear-resistant deflector roll comprises an inlet deflector roll 1 and an outlet deflector roll 4, wherein an uncoiler 5 is arranged at the front end of the inlet deflector roll 1, an inlet flattening roll 2 is arranged at the rear end of the inlet deflector roll 1, a roller 3 is arranged at the rear end of the inlet flattening roll 2, the rear end of the roller 4 is provided with the outlet deflector roll 4, the rear end of the outlet deflector roll 4 is a coiling machine 5, and the inlet deflector roll 1 and the outlet deflector roll 4 are deflector rolls taking NDI polyurethane elastomer as an encapsulation layer 8.
The roll 3 includes upper and lower backup rolls 33, 34 and upper and lower work rolls 31, 32, and a pair of upper and lower work rolls 31, 32 is located between the upper and lower backup rolls 33, 34, with the roll surface of the upper work roll 31 being in contact with the roll surface of the upper backup roll 33 and the roll surface of the lower work roll 32, and the roll surface of the lower work roll 32 being in contact with the roll surface of the lower backup roll 34.
The deflection roller comprises a roller core 7, wherein the roller core 7 is of a hollow cylindrical structure, threads are arranged on the outer surface of the roller core 7, an encapsulating layer 8 is arranged on the periphery of the roller core 7, and the roller core 7 and the encapsulating layer 8 are embedded into a whole; the left end of the roller core 7 is provided with a left shaft head 9, the right end of the left shaft head 9 is inserted into the cylindrical hollow at the left side of the roller core 7 and welded and fixed with the inner periphery at the left side of the roller core 7, and the left end of the left shaft head 9 is provided with a key slot; the right end of the roller core 7 is provided with a right shaft head 10, the left end of the right shaft head 10 is inserted into the cylindrical hollow on the right side of the roller core 7 and welded and fixed with the inner periphery on the right side of the roller core 7, and the inner walls at the two ends of the roller core 7 are provided with steps to limit the positions of the left shaft head 9 and the right shaft head 10 inserted into the roller core 7.
The roller core 7 is made of steel materials, and the encapsulation layer 8 is made of NDI polyurethane elastomer. The NDI type polyurethane elastomer is embedded and integrated outside the steel roller core, the NDI type polyurethane elastomer has excellent abrasion resistance, and can form an outer layer with higher strength and excellent abrasion resistance, so that the deflection roller has the advantages of high elasticity and high abrasion resistance, high-pressure load resistance, high abrasion resistance and high elastic restoring force, the loss is reduced, the deformation of the outer layer is allowed, the contact area between the outer peripheral surface of the deflection roller body and aluminum and copper strips is ensured, the reduction of the friction coefficient is restrained, the balance of the abrasion resistance and the friction coefficient of the deflection roller surface is obtained, and the service life of the deflection roller is prolonged.
The length of the deflection guide roller is 300-3000mm, the diameter of the deflection guide roller is 80-500mm, the temperature resistance of the deflection guide roller is 20-160 ℃, the thickness of the deflection guide roller adhesive coating layer 8 can be adjusted according to the roller diameter, and the thickness of the adhesive coating layer 8 is 5-30mm; the Shore hardness of the roller surface after encapsulation is 75-95; the load of the deflection roller is 1-100000N, and the rotating speed of the deflection roller is 0-1800m/min.
NDI type polyurethane elastomer is NDI 1, 5-Naphthalene Diisocyanate (NDI), white to pale yellow flaky crystalline solid with a molecular formula of C 12 H 6 N 2 O 2 Melting point of 126-127 deg.C and density of 1.42-1.45g/cm 3 The physical properties are shown in the following table:
the actual use working condition simulation detection of the deflection roller with the NDI type polyurethane elastomer is that: the diameter of the eccentric guide roller rubber coating wheel is 124mm, the rubber surface width is 70mm, the rubber thickness is 9mm, the load is 2000kg, and the speed is 15km/h; the temperature rise curve comparison diagram of the destructive test glue surface of the deflection roller of the TDI and the deflection roller with the NDI type polyurethane elastomer glue coating layer is shown in figure 3, the deflection roller with the NDI type polyurethane elastomer glue coating layer has extremely low internal heat generation rate due to the symmetry of the molecular structure of the deflection roller, and the internal heat generation can not be accumulated when the deflection roller is subjected to alternating load, so that the use condition of high temperature is satisfied.
The working process of the cold rolling mill comprises the following steps: the technical processes of preparation before rolling, lifting, uncoiling, threading, rolling, unloading and the like are firstly to check whether a rolling mill and oil tanks leak oil or not, whether all equipment operates normally or not, a coil stock fed in the previous working procedure is hung on a saddle by a travelling crane, an uncoiler 5 is started, a strip is sleeved on a winding drum, the uncoiling is pressed on a strip coil, a strip head is conveyed to an inlet deflection roller 1 along a guide plate, the strip passes through an inlet flattening roller 2 and enters a roller 3 for rolling, the rolled strip is conveyed to an outlet deflection roller 4 along the guide plate, and a coiling machine 6 is started to coil the strip. The structure of the eccentric guide roller of the cold rolling mill adopts a hollow cylindrical steel core outer surface encapsulated high-performance NDI polyurethane elastomer, the head of the eccentric guide roller can be designed according to interfaces with different use requirements, the thickness of the rubber coating layer 8 can be adjusted according to the roller diameter, the external dimensions such as the length, the diameter and the like of the roller can be designed according to the requirements, the whole structure of the eccentric guide roller is simple, the abrasion resistance of the eccentric guide roller is excellent, and the abrasion is low; the deflection roller has extremely low internal heat generation rate due to the symmetry of the molecular structure of the deflection roller, and internal heat generation can not be accumulated in the alternating load, so that the high-temperature use condition of cold rolling mill equipment is met; the deflection roller has high tearing strength, and the situation that the strip cuts the roller surface is avoided; the maintenance work of daily cleaning roller surfaces is reduced, the production efficiency is improved, the technical problem in the production process is solved, and the continuous operation production is facilitated.
Claims (5)
1. A cold rolling mill with high-elastic wear-resistant deflection roller is characterized in that: the device comprises an inlet deflection roller and an outlet deflection roller, wherein an uncoiler is arranged at the front end of the inlet deflection roller, an inlet flattening roller is arranged at the rear end of the inlet deflection roller, a roller is arranged at the rear end of the inlet flattening roller, the rear end of the roller is provided with the outlet deflection roller, the rear end of the outlet deflection roller is a coiling machine, and the inlet deflection roller and the outlet deflection roller are deflection rollers taking NDI polyurethane elastomer as a glue coating layer.
2. A cold rolling mill having a high-elastic wear-resistant deflector roll as set forth in claim 1, wherein: the roller comprises an upper supporting roller, a lower supporting roller, an upper working roller and a lower working roller, wherein the upper working roller is respectively contacted with the roller surfaces of the upper supporting roller and the lower working roller, and the lower working roller is contacted with the roller surface of the lower supporting roller.
3. A cold rolling mill having a high-elastic wear-resistant deflector roll as set forth in claim 1, wherein: the deflection roller comprises a roller core, the roller core is of a hollow cylindrical structure, threads are arranged on the outer surface of the roller core, an encapsulating layer is arranged on the periphery of the roller core, and the roller core and the encapsulating layer are embedded into a whole; the left end of the roller core is provided with a left shaft head, the right end of the left shaft head is inserted into the left cylindrical hollow of the roller core and welded and fixed with the left inner periphery of the roller core, and the left end of the left shaft head is provided with a key slot; the right end of the roller core is provided with a right shaft head, the left end of the right shaft head is inserted into the right cylindrical hollow of the roller core and welded and fixed with the right inner periphery of the roller core, and the inner walls of the two ends of the roller core are provided with steps to limit the positions of the left shaft head and the right shaft head inserted into the roller core.
4. A cold rolling mill having a high-elastic wear-resistant deflector roll as set forth in claim 1, wherein: the roller core is made of steel materials, and the rubber coating layer is made of NDI polyurethane elastomer.
5. A cold rolling mill having a high-elastic wear-resistant deflector roll as set forth in claim 1, wherein: the length of the deflection guide roller is 300-3000mm, the diameter of the deflection guide roller is 80-500mm, the temperature resistance of the deflection guide roller is 20-160 ℃, the thickness of the deflection guide roller adhesive coating layer can be adjusted according to the roller diameter, and the thickness of the adhesive coating layer is 5-30mm; the Shore hardness of the roller surface after encapsulation is 75-95.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320104467.5U CN219880934U (en) | 2023-01-31 | 2023-01-31 | Cold rolling mill with wear-resisting deflector roll of high bullet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320104467.5U CN219880934U (en) | 2023-01-31 | 2023-01-31 | Cold rolling mill with wear-resisting deflector roll of high bullet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219880934U true CN219880934U (en) | 2023-10-24 |
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ID=88402837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320104467.5U Active CN219880934U (en) | 2023-01-31 | 2023-01-31 | Cold rolling mill with wear-resisting deflector roll of high bullet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219880934U (en) |
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2023
- 2023-01-31 CN CN202320104467.5U patent/CN219880934U/en active Active
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