CN113210431A - Method for improving surface quality of corrugated roller cold-rolled metal sheet based on nano lubrication - Google Patents
Method for improving surface quality of corrugated roller cold-rolled metal sheet based on nano lubrication Download PDFInfo
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- CN113210431A CN113210431A CN202110468720.0A CN202110468720A CN113210431A CN 113210431 A CN113210431 A CN 113210431A CN 202110468720 A CN202110468720 A CN 202110468720A CN 113210431 A CN113210431 A CN 113210431A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
Abstract
The invention discloses a method for improving the surface quality of a corrugated roller cold-rolled metal plate based on nano lubrication. The method comprises the steps of cleaning the surface of a metal plate to be rolled, or polishing, cleaning and assembling the surface to be compounded of a plurality of metal plates to be rolled, feeding one metal plate or a plurality of blanks assembled by the metal plates into a corrugated rolling mill by a cold rolling method for first pass rolling, then feeding the blanks into a flat rolling mill for second pass rolling, uniformly spraying a nano lubricant prepared by water, oil and nano particles on a corrugated roller of the corrugated rolling mill and upper and lower rollers of the flat rolling mill and the flat rolling mill in the two-pass rolling process, obtaining a single-layer or composite metal plate after rolling, and then carrying out heat treatment, straightening and the like to obtain a metal plate finished product. The invention not only can prolong the service life of the roller, but also can obviously improve the surface quality of the metal sheet, and solves the problems of plate shape warping, poor surface quality and the like in the cold rolling process of the corrugated roller of the metal sheet.
Description
Technical Field
The invention relates to the technical field of rolling, in particular to a method for improving the surface quality of a corrugated roller cold-rolled metal plate based on nano lubrication.
Background
The metal plate mainly comprises a single-layer plate and a composite plate, and the composite plate has incomparable excellent comprehensive performance compared with single metal or alloy, so that the composite plate is one of metal structural materials which are intensively developed in the country in recent years.
The rolling method is one of the main preparation methods of the metal plate and has the advantage of stable and continuous production. For the composite plate, the rolling preparation is that the metal plate to be compounded breaks the coating film on the contact surface of the dissimilar metal under the action of strong rolling pressure of a rolling mill, plastic flow is generated in the whole contact surface, fresh base metal extruded from a surface layer crack is in close contact to generate atomic reaction in a microscopic scale, and finally, a contact interface between metal layers forms metallurgical bonding with certain strength.
At present, the requirements for the shape and surface quality of metal plates are higher and higher. However, in the cold rolling of corrugated rolls of sheet metal, there are still problems of warping of the sheet shape and poor surface quality.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for improving the surface quality of a corrugated roller cold-rolled metal plate based on nano lubrication.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for improving the surface quality of a corrugated roller cold-rolled metal sheet based on nano lubrication comprises the following steps:
step 4, the single-layer or composite corrugated plate obtained in the first pass in the step 3 is sent to a flat rolling mill for second pass rolling, the nano lubricant prepared in the step 2 is uniformly sprayed on an upper roller and a lower roller in the rolling process, and the single-layer or composite metal plate with good surface quality is obtained after rolling;
and 5, carrying out heat treatment, straightening, trimming and segmenting on the single-layer or composite metal plate obtained by rolling to obtain a metal plate finished product.
Further, the number of the metal plates to be rolled in the step 1 is two or more; the thickness of each of the plurality of metal plates to be rolled is 1-6mm, and the plurality of metal plates before rolling and compounding are the same or different in thickness and the same or different in material.
Still further, the washing in step 1 is specifically washing with absolute ethanol.
Furthermore, the polishing in the step 1 is specifically polishing by using a steel brush to expose fresh metal; the binding is to bind a plurality of metal plates together by using rivets or aluminum wires.
Furthermore, in the nano lubricant prepared in the step 2, the mass fraction of the oil is 1% -4%, the mass fraction of the nano particles is not more than 4%, and the balance is water.
Furthermore, the nanoparticles in step 2 are metal oxide, graphene or graphene oxide, wherein gold is usedThe metal oxide being TiO2、ZrO2、Fe3O4、Al2O3ZnO or CuO; the size of the nano particles or the thickness of the lamella is not more than 60 nm; the oil is rolling lubricating oil.
Furthermore, in the step 3, the upper roll of the corrugated roll mill is a corrugated roll, and the lower roll of the corrugated roll mill is a flat roll.
Furthermore, the reduction rate of the first rolling in the step 3 is more than 30%.
Furthermore, the reduction rate of the second pass rolling in the step 4 is more than 25%.
Further, the metal plate is copper, aluminum, copper alloy or aluminum alloy.
The method of the invention is suitable for rolling and compounding two or more layers of metal plates and is also suitable for rolling single-layer metal plates.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention sprays the nanometer lubricant in the rolling process, which can reduce the friction coefficient of the metal plate in the rolling process and reduce the rolling force, thereby effectively prolonging the service life of the roller.
2. The nano lubricant used in the invention can be recycled, the process cost is reduced, and the pollution to the environment caused by lubricant emission is reduced. The nano particles play roles of rolling balls, polishing, filling and repairing, forming a protective film and the like in the rolling process of the corrugated roller, and can obviously improve the surface quality of the metal plate.
3. According to the invention, through improving the fluidity of the metal on the surface layer of the metal plate, the residual stress of the metal plate can be reduced, and the plate shape warping degree can be effectively improved.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
FIG. 2 is a 3D image of a rolled aluminum alloy sheet peak in an unlubricated state.
FIG. 3 is a 3D image of the wave crests of the rolled aluminum alloy sheet in the nano-lubricated state in example 5.
FIG. 4 is a 3D image of a trough of a rolled aluminum alloy sheet in an unlubricated state.
FIG. 5 is a 3D image of the valleys of a rolled aluminum alloy sheet in the nano-lubricated state as in example 5.
In the figure, 1-the first injection system, 2-the second injection system, 3-the third injection system, 4-the fourth injection system.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples. It should be understood by those skilled in the art that the specific embodiments are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
As shown in fig. 1, a method for improving the surface quality of a corrugated roller cold-rolled metal sheet based on nano lubrication comprises the following steps:
step 4, mixing water, rolling lubricating oil and nano particles according to a ratio of 95: 4: 1 (mass fraction), high-speed stirring and ultrasonic vibration treatment, and preparing a nano lubricant; wherein the nano particles are ZnO, and the particle size is 20 nm;
and 5, conveying the blanks assembled in the step 3 into a corrugated roller mill for first-pass rolling compounding, wherein the copper alloy faces a corrugated roller, and the first-pass rolling reduction rate is larger than 30%. And (3) uniformly spraying the nano lubricant prepared in the step (4) to the corrugated roller by using the first spraying system (1) and the flat roller by using the second spraying system (2) in the rolling process, uniformly covering the nano lubricant on the surfaces of the whole corrugated roller and the flat roller, and rolling to obtain the composite corrugated plate. The upper roller of the corrugated roller mill is a corrugated roller, and the lower roller of the corrugated roller mill is a flat roller;
and 6, sending the composite corrugated plate obtained in the first pass in the step 5 into a flat rolling mill for second pass rolling, wherein the reduction rate is more than 25%. And (3) uniformly spraying the nano lubricant prepared in the step (4) to the upper roller by using a third spraying system (3) and the lower roller by using a fourth spraying system (4) in the rolling process, so that the surfaces of the upper roller and the lower roller are uniformly covered with the nano lubricant, and the composite metal plate with good surface quality is obtained after rolling. The upper and lower rollers of the flat rolling mill are both flat rollers;
and 7, carrying out heat treatment, straightening, trimming and segmenting on the composite metal plate obtained by rolling to obtain a metal plate finished product.
Example 2
As shown in fig. 1, a method for improving the surface quality of a corrugated roller cold-rolled metal sheet based on nano lubrication comprises the following steps:
step 4, mixing water, rolling lubricating oil and nano particles according to a ratio of 95: 2: 3 (mass fraction), high-speed stirring and ultrasonic vibration treatment, and preparing a nano lubricant; wherein the nanoparticles are Fe3O4The particle size is 30 nm;
and 5, conveying the blanks assembled in the step 3 into a corrugated roller mill for first-pass rolling compounding, wherein the copper alloy faces a corrugated roller, and the first-pass rolling reduction rate is larger than 30%. And (3) uniformly spraying the nano lubricant prepared in the step (4) to the corrugated roller by using the first spraying system (1) and the flat roller by using the second spraying system (2) in the rolling process, uniformly covering the nano lubricant on the surfaces of the whole corrugated roller and the flat roller, and rolling to obtain the composite corrugated plate. The upper roller of the corrugated roller mill is a corrugated roller, and the lower roller of the corrugated roller mill is a flat roller;
and 6, sending the composite corrugated plate obtained in the first pass in the step 5 into a flat rolling mill for second pass rolling, wherein the reduction rate is more than 25%. And (3) uniformly spraying the nano lubricant prepared in the step (4) to the upper roller by using a third spraying system (3) and the lower roller by using a fourth spraying system (4) in the rolling process, so that the surfaces of the upper roller and the lower roller are uniformly covered with the nano lubricant, and the composite metal plate with good surface quality is obtained after rolling. The upper and lower rollers of the flat rolling mill are both flat rollers;
and 7, carrying out heat treatment, straightening, trimming and segmenting on the composite metal plate obtained by rolling to obtain a metal plate finished product.
Example 3
As shown in fig. 1, a method for improving the surface quality of a corrugated roller cold-rolled metal sheet based on nano lubrication comprises the following steps:
step 4, mixing water, rolling lubricating oil and nano particles according to a ratio of 93: 3: 4 (mass fraction), high-speed stirring and ultrasonic vibration treatment, and preparing a nano lubricant; the nano particles are graphene nano sheets, and the thickness of the nano sheets is 10 nm;
and 5, conveying the blanks assembled in the step 3 into a corrugated roller mill for first-pass rolling compounding, wherein the copper alloy faces a corrugated roller, and the first-pass rolling reduction rate is larger than 30%. And (3) uniformly spraying the nano lubricant prepared in the step (4) to the corrugated roller by using the first spraying system (1) and the flat roller by using the second spraying system (2) in the rolling process, uniformly covering the nano lubricant on the surfaces of the whole corrugated roller and the flat roller, and rolling to obtain the composite corrugated plate. The upper roller of the corrugated roller mill is a corrugated roller, and the lower roller of the corrugated roller mill is a flat roller;
and 6, sending the composite corrugated plate obtained in the first pass in the step 5 into a flat rolling mill for second pass rolling, wherein the reduction rate is more than 25%. And (3) uniformly spraying the nano lubricant prepared in the step (4) to the upper roller by using a third spraying system (3) and the lower roller by using a fourth spraying system (4) in the rolling process, so that the surfaces of the upper roller and the lower roller are uniformly covered with the nano lubricant, and the composite metal plate with good surface quality is obtained after rolling. The upper and lower rollers of the flat rolling mill are both flat rollers;
and 7, carrying out heat treatment, straightening, trimming and segmenting on the composite metal plate obtained by rolling to obtain a metal plate finished product.
Example 4
As shown in fig. 1, a method for improving the surface quality of a corrugated roller cold-rolled metal sheet based on nano lubrication comprises the following steps:
and 3, conveying the cleaned copper alloy plate obtained in the step 1 into a corrugated rolling mill for primary rolling, so that the rolling reduction rate of the primary rolling is greater than 30%. And (3) uniformly spraying the nano lubricant prepared in the step (2) to the corrugated roller by using the first spraying system (1) and the flat roller by using the second spraying system (2) in the rolling process, so that the surfaces of the whole corrugated roller and the flat roller are uniformly covered with the nano lubricant, and obtaining the corrugated plate after rolling. The upper roller of the corrugated roller mill is a corrugated roller, and the lower roller of the corrugated roller mill is a flat roller;
and 4, conveying the corrugated plate obtained in the first pass in the step 3 into a flat rolling mill for second pass rolling, wherein the reduction rate is more than 25%. And (3) uniformly spraying the nano lubricant prepared in the step (2) to the upper roller by using a third spraying system (3) and the lower roller by using a fourth spraying system (4) in the rolling process, so that the surfaces of the upper roller and the lower roller are uniformly covered with the nano lubricant, and obtaining the metal plate with good surface quality after rolling. The upper and lower rollers of the flat rolling mill are both flat rollers;
and 5, carrying out heat treatment, straightening, trimming and segmenting on the metal plate obtained by rolling to obtain a metal plate finished product.
Example 5
As shown in fig. 1, a method for improving the surface quality of a corrugated roller cold-rolled metal sheet based on nano lubrication comprises the following steps:
and 3, conveying the aluminum alloy plate cleaned in the step 1 into a corrugated rolling mill for primary rolling, so that the rolling reduction rate of the primary rolling is more than 30%. And (3) uniformly spraying the nano lubricant prepared in the step (2) to the corrugated roller by using the first spraying system (1) and the flat roller by using the second spraying system (2) in the rolling process, so that the surfaces of the whole corrugated roller and the flat roller are uniformly covered with the nano lubricant, and obtaining the corrugated plate after rolling. The upper roller of the corrugated roller mill is a corrugated roller, and the lower roller of the corrugated roller mill is a flat roller;
and 4, conveying the corrugated plate obtained in the first pass in the step 3 into a flat rolling mill for second pass rolling, wherein the reduction rate is more than 25%. And (3) uniformly spraying the nano lubricant prepared in the step (2) to the upper roller by using a third spraying system (3) and the lower roller by using a fourth spraying system (4) in the rolling process, so that the surfaces of the upper roller and the lower roller are uniformly covered with the nano lubricant, and obtaining the metal plate with good surface quality after rolling. The upper and lower rollers of the flat rolling mill are both flat rollers;
and 5, carrying out heat treatment, straightening, trimming and segmenting on the metal plate obtained by rolling to obtain a metal plate finished product.
Fig. 3 and 5 are respectively a peak 3D image and a trough 3D image of the aluminum alloy plate rolled in the present embodiment under the nano-lubrication state, and compared with a peak 3D image and a trough 3D image of the aluminum alloy plate rolled in the non-lubrication state, it can be seen that the surfaces of the peak and the trough of the aluminum alloy plate rolled in the non-lubrication state are rough, the surfaces of the peak and the trough of the aluminum alloy plate rolled in the nano-lubrication state are smoother, and the surface quality is better improved.
The metal plate to be rolled of the present invention is not limited to the metal material in the above-described embodiment, but may be copper or aluminum. The metal plates to be compounded in the above embodiments are made of the same material or different material combinations; the nanoparticles in the above embodiments may also be CuO or ZrO2Or graphene oxide.
Claims (10)
1. The method for improving the surface quality of the corrugated roller cold-rolled metal sheet based on the nano lubrication is characterized by comprising the following steps of:
step 1, preparing a metal plate to be rolled for rolling, or preparing a plurality of metal plates to be rolled for rolling and compounding; when a metal plate to be rolled is selected for rolling, cleaning the surface of the metal plate to be rolled for later use; when a plurality of metal plates to be rolled are selected for rolling and compounding, firstly, polishing the surfaces to be compounded of the plurality of metal plates to expose fresh metal, then cleaning the surfaces of the plurality of polished metal plates, finally, folding and stacking the plurality of cleaned metal plates, and binding the metal plates together to finish assembly;
step 2, mixing water, oil and nano particles according to a proportion, and carrying out high-speed stirring and ultrasonic vibration treatment to prepare a nano lubricant;
step 3, feeding a metal plate or a blank assembled by a plurality of metal plates to be rolled cleaned in the step 1 into a corrugated roller mill for primary rolling, uniformly spraying the nano lubricant prepared in the step 2 onto a corrugated roller and a flat roller in the rolling process, and obtaining a single-layer or composite corrugated plate after rolling;
step 4, the single-layer or composite corrugated plate obtained in the first pass in the step 3 is sent to a flat rolling mill for second pass rolling, the nano lubricant prepared in the step 2 is uniformly sprayed on an upper roller and a lower roller in the rolling process, and the single-layer or composite metal plate with good surface quality is obtained after rolling;
and 5, carrying out heat treatment, straightening, trimming and segmenting on the single-layer or composite metal plate obtained by rolling to obtain a metal plate finished product.
2. The method for improving the surface quality of a corrugated roll cold rolled metal sheet based on nano lubrication as claimed in claim 1, wherein: the number of the metal plates to be rolled in the step 1 is two or more; the thickness of each of the plurality of metal plates to be rolled is 1-6mm, and the plurality of metal plates before rolling and compounding are the same or different in thickness and the same or different in material.
3. The method for improving the surface quality of the corrugated roller cold-rolled metal sheet based on the nano-lubrication as claimed in claim 1, wherein the method comprises the following steps: the cleaning in the step 1 is specifically cleaning with absolute ethyl alcohol.
4. The method for improving the surface quality of a corrugated roll cold rolled metal sheet based on nano lubrication as claimed in claim 1, wherein: the polishing in the step 1 is to polish by using a steel brush to expose fresh metal; the binding is to bind a plurality of metal plates together by using rivets or aluminum wires.
5. The method for improving the surface quality of a corrugated roll cold rolled metal sheet based on nano lubrication as claimed in claim 1, wherein: in the nano lubricant prepared in the step 2, the mass fraction of oil is 1% -4%, the mass fraction of nano particles is not more than 4%, and the balance is water.
6. The method for improving the surface quality of a corrugated roll cold rolled metal sheet based on nano lubrication as claimed in claim 1, wherein: the nano particles in the step 2 are metal oxide, graphene or graphene oxide, wherein the metal oxide is TiO2、ZrO2、Fe3O4、Al2O3ZnO or CuO; the size of the nano particles or the thickness of the lamella is not more than 60 nm; the oil is rolling lubricating oil.
7. The method for improving the surface quality of the corrugated roller cold-rolled metal sheet based on the nano-lubrication as claimed in claim 1, wherein the method comprises the following steps: and 3, an upper roller of the corrugated roller mill in the step 3 is a corrugated roller, and a lower roller of the corrugated roller mill is a flat roller.
8. The method for improving the surface quality of a corrugated roll cold rolled metal sheet based on nano lubrication as claimed in claim 1, wherein: the reduction rate of the first rolling in the step 3 is more than 30%.
9. The method for improving the surface quality of a corrugated roll cold rolled metal sheet based on nano lubrication as claimed in claim 1, wherein: the reduction rate of the second pass rolling in the step 4 is more than 25%.
10. The method for improving the surface quality of a corrugated roll cold rolled metal sheet based on nano lubrication as claimed in claim 1, wherein: the metal plate is copper, aluminum, copper alloy or aluminum alloy.
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