CN114131290A - Manufacturing method of super-large-diameter cathode roller - Google Patents
Manufacturing method of super-large-diameter cathode roller Download PDFInfo
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- CN114131290A CN114131290A CN202111284431.1A CN202111284431A CN114131290A CN 114131290 A CN114131290 A CN 114131290A CN 202111284431 A CN202111284431 A CN 202111284431A CN 114131290 A CN114131290 A CN 114131290A
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Abstract
The invention relates to a method for manufacturing an oversized-diameter cathode roller, which comprises the following steps: s1, forging a titanium ingot: heating and forging a titanium ingot to ensure that the grain structure of the titanium ingot is uniformly distributed, and extruding the titanium ingot by ring rolling equipment to prepare a titanium cylinder blank ring; s2, spinning a titanium cylinder: heating the titanium cylinder blank ring, sleeving the titanium cylinder blank ring into a spinning die, and performing spinning processing in five passes to obtain a titanium cylinder; s3, manufacturing of the cathode roller: and heating the titanium cylinder to realize the interference assembly of the cathode roller core and the titanium cylinder, and turning to manufacture the cathode roller with the ultra-large diameter. The method does not use welding or other processing modes for adding materials, can ensure the uniform and consistent microstructure of the cylinder body, and the titanium cylinder produced by the method can produce the cathode roller with the outer diameter of 3000mm to 4000 mm. Compare in the equal broad width cathode roll of external diameter 2700mm, the cathode roll of external diameter 3000mm above can make the production efficiency of copper foil improve 20 ~ 40% under the unchangeable circumstances of holding current density, and manufacturing cost can not increase simultaneously.
Description
Technical Field
The invention belongs to the technical field of titanium material processing, and relates to a manufacturing method of an oversized-diameter cathode roller.
Background
The cathode roll is an important production tool in electrolytic copper foil manufacturing equipment, copper ions are reduced into copper atoms by electrolytic reduction reaction and are deposited on the surface of the cathode roll, and finally, the copper foil is produced. At present, copper foil manufacturers in China generally adopt cathode rollers with the diameter of phi 2700mm, which is the largest diameter capable of being produced in China. With the development of downstream industries, the demand of copper foil increases rapidly, and how to improve the yield of copper foil meets the market demand. The most important way for improving the production efficiency of the copper foil is to improve the current density of a working surface or increase the contact area participating in the electrolytic reaction, however, the copper foil has the problems of air holes, salient points, uneven thickness and the like due to overlarge current density, the coating of the matched anode plate can be quickly damaged due to the overlarge current density, and the production cost of the copper foil is increased due to frequent replacement of the anode plate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for manufacturing an oversized-diameter cathode roller, which can ensure that the microstructure of a cylinder body is uniform and consistent without welding or other material-increasing processing modes, and the titanium cylinder produced by the method can produce the cathode roller with the outer diameter of 3000mm to 4000 mm.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for manufacturing an oversized-diameter cathode roller is characterized by comprising the following steps:
s1, forging a titanium ingot: heating and forging a titanium ingot to ensure that the grain structure of the titanium ingot is uniformly distributed, and extruding the titanium ingot by ring rolling equipment to prepare a titanium cylinder blank ring;
s2, spinning a titanium cylinder: heating the titanium cylinder blank ring, sleeving the titanium cylinder blank ring into a spinning die, and performing spinning processing in five passes to obtain a titanium cylinder;
s3, manufacturing of the cathode roller: and heating the titanium cylinder to realize the interference assembly of the cathode roller core and the titanium cylinder, and turning to manufacture the cathode roller with the ultra-large diameter.
Further, the step S1 specifically includes the following steps:
s101, heating a cylindrical titanium ingot to 1100-1200 ℃, forging the cylindrical titanium ingot for three times respectively from the axial direction and the radial direction, axially forging the ingot to enable the deformation of the ingot to be higher than 30%, and radially forging the titanium ingot to enable the size of the titanium ingot to be recovered to the size before forging;
s102, turning the titanium ingot processed in the step S101 to remove oxide skin on the surface of the titanium ingot, wherein the turning surface roughness does not exceed Ra3.2 mu m;
s103, drilling an inner hole on the cylindrical shaft center of the titanium ingot turned in the step S102, wherein the diameter of the inner hole is 250mm, the inner hole penetrates through the titanium ingot, and the hole and the outer surface of the titanium ingot are concentric;
s104, filling inert protective gas into the intermediate frequency furnace, heating the titanium ingot obtained in the step S103 to 950-1000 ℃, extruding the outer surface of the titanium ingot by using ring rolling equipment and expanding an inner hole to prepare a titanium tube blank ring;
s105, turning and polishing the inner diameter and the outer diameter of the titanium tube blank ring obtained in the step S104, wherein the surface roughness is less than or equal to Ra0.8 mu m;
further, the specific content of step S2 is as follows:
filling an intermediate frequency furnace with inert protective gas, heating the titanium cylinder blank ring to 800 ℃, sleeving the titanium cylinder blank ring into a spinning die, spinning when the titanium cylinder blank ring is cooled to 600 ℃, and spinning for five times to obtain the titanium cylinder, wherein the wall thickness deformation of the titanium cylinder blank ring formed by spinning each time is 18.8% -19.2%.
Further, before the interference assembling of the cathode roller core and the titanium cylinder in the step S3, the method includes the following steps:
s301: filling inert protective gas into the resistance furnace, heating the titanium cylinder prepared in the step S2 to 470-500 ℃, preserving heat for 2 hours, and cooling to room temperature along with the furnace;
s302: turning the inner wall of the titanium cylinder, wherein the surface roughness is less than or equal to Ra3.2 mu m after turning, and plating silver on the inner wall of the titanium cylinder, wherein the silver plating thickness is 0.005 mm.
Further, the cathode roller core in the step S3 includes the steel shaft, the steel shaft sets up the axle center position at the steel cylinder body, steel shaft and steel cylinder body are fixed through the steel curb plate, the cathode roller core still includes copper cylinder body and copper pipe, the copper cylinder body is through heating interference fit in the steel cylinder body outside, the copper pipe is through heating interference fit in the steel shaft both sides, the copper cylinder body is connected through welding the copper curb plate with the copper pipe.
Further, in the step S3, the specific method for interference assembling the roll core of the cathode roll and the titanium cylinder is as follows:
turning the outer surface of a roller core of the cathode roller, polishing the outer surface, plating silver on the outer surface, filling inert protective gas into a resistance furnace, heating a titanium cylinder to 200 ℃, preserving heat for 1 hour, putting the roller core of the cathode roller into the titanium cylinder in a hearth of the resistance furnace, and welding titanium side plates and a titanium sheath on two sides of a roller body to manufacture the cathode roller when the temperature of the hearth is reduced to room temperature.
Further, in step S3, the outer diameter of the cathode roll is turned, and the roll surface is polished to ra0.8 μm.
Further, the manufacturing method is suitable for producing cathode rollers with the outer diameter of 3000mm to 4000 mm.
Compared with the prior art, the invention has the following beneficial effects:
a method for manufacturing an oversized-diameter cathode roller does not use welding or other material-increasing processing modes, can ensure that the microstructure of a cylinder body is uniform and consistent, and can produce the cathode roller with the external diameter of 3000mm to 4000mm by using a titanium cylinder produced by the method. Compare in the equal broad width cathode roll of external diameter 2700mm, the cathode roll of external diameter more than 3000mm can make the production efficiency of copper foil improve 20 ~ 40% under the unchangeable condition of holding current density, and the coating life-span of supporting positive pole can not receive the influence, and the manufacturing cost of per ton copper foil can not increase simultaneously and keeps unchangeable. And the copper foil does not generate air holes, salient points, uneven thickness and the like.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a view showing the structure of an oversized-diameter cathode roll according to the present invention;
FIG. 2 is a gold phase diagram of a copper foil produced by a cathode roll having an outer diameter of 3000mm according to example 1 of the present invention;
wherein: 1. a titanium cylinder; 2. a copper cylinder; 3. a steel cylinder body; 4. a steel side plate; 5. a copper side plate; 6. a titanium side plate; 7. a titanium sheath; 8. a copper pipe; 9. a steel shaft.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.
A manufacturing method of an oversized-diameter cathode roller comprises the following steps:
s1, forging a titanium ingot: heating and forging a titanium ingot to ensure that the grain structure of the titanium ingot is uniformly distributed, and extruding the titanium ingot by ring rolling equipment to prepare a titanium cylinder blank ring;
s101, heating a cylindrical titanium ingot to 1100-1200 ℃, forging the cylindrical titanium ingot for three times respectively from the axial direction and the radial direction, axially forging the ingot to enable the deformation of the ingot to be higher than 30%, and radially forging the titanium ingot to enable the deformation of the ingot to be recovered to 970-1000 mm;
s102, turning the titanium ingot processed in the step S101 to remove oxide skin on the surface of the titanium ingot, wherein the turning surface roughness does not exceed Ra3.2 mu m;
s103, drilling an inner hole on the cylindrical shaft center of the titanium ingot turned in the step S102, wherein the diameter of the inner hole is 250mm, the inner hole penetrates through the titanium ingot, and the hole and the outer surface of the titanium ingot are concentric;
s104, filling inert protective gas into the intermediate frequency furnace, heating the titanium ingot obtained in the step S103 to 950-1000 ℃, extruding the outer surface of the titanium ingot by using ring rolling equipment and expanding an inner hole to prepare a titanium tube blank ring;
s105, turning and polishing the inner diameter and the outer diameter of the titanium tube blank ring obtained in the step S104, wherein the surface roughness is less than or equal to Ra0.8 mu m;
s2, spinning a titanium cylinder: filling an intermediate frequency furnace with inert protective gas, heating the titanium cylinder blank ring to 800 ℃, sleeving the titanium cylinder blank ring into a spinning die, spinning when the titanium cylinder blank ring is cooled to 600 ℃, and spinning for five times to obtain the titanium cylinder, wherein the wall thickness deformation of the titanium cylinder blank ring formed by spinning each time is 18.8% -19.2%.
S3, manufacturing of the cathode roller: and heating the titanium cylinder to realize interference assembly of the cathode roller core and the titanium cylinder, and polishing the roller surface to Ra0.8 mu m through turning to prepare the cathode roller with the super-large diameter.
S301: filling inert protective gas into the resistance furnace, heating the titanium cylinder prepared in the step S2 to 470-500 ℃, preserving heat for 2 hours, and cooling to room temperature along with the furnace;
s302: turning the inner wall of the titanium cylinder, wherein the surface roughness is less than or equal to Ra3.2 mu m after turning, and plating silver on the inner wall of the titanium cylinder, wherein the silver plating thickness is 0.005 mm.
The cathode roller core comprises a steel shaft 9, the steel shaft 9 is arranged at the axis position of the steel cylinder body 3, the steel shaft 9 and the steel cylinder body 3 are fixed through a steel side plate 4, the cathode roller core further comprises a copper cylinder body 2 and a copper pipe 8, the copper cylinder body 2 is assembled on the outer side of the steel cylinder body 3 through heating interference, the copper pipe 8 is assembled on two sides of the steel shaft 9 through heating interference, and the copper cylinder body 2 and the copper pipe 8 are connected through a welded copper side plate 5.
The specific method for interference assembly of the cathode roller core and the titanium cylinder comprises the following steps:
turning the outer surface of a roller core of the cathode roller, polishing the outer surface, plating silver on the outer surface, filling inert protective gas into a resistance furnace, heating a titanium cylinder 1 to 200 ℃, preserving heat for 1 hour, loading the roller core of the cathode roller into the titanium cylinder 1 in a hearth of the resistance furnace, and welding titanium side plates 6 and titanium sheaths 7 on two sides of a roller body to manufacture the cathode roller when the temperature of the hearth is reduced to room temperature.
The following is described with reference to specific process procedures:
example 1:
the embodiment is a manufacturing method of a cathode roller with an outer diameter of 3000mm, which comprises the following steps:
selecting a TA1 pure titanium ingot, and turning to the outer diameter of 980mm and the height of 1000 mm.
Heating the titanium ingot to 1100 ℃, forging the titanium ingot for three times respectively from the axial direction and the radial direction, wherein the deformation of the titanium ingot is 32% by axial forging, and the height of the titanium ingot is restored to 970mm by radial forging; turning the titanium ingot to an outer diameter of 960mm and a height of 950mm, removing all oxide skins on the surface of the titanium ingot, wherein the surface roughness of the turning process should not exceed Ra3.2 mu m; drilling a hole with the diameter of 250mm in the axis of the titanium ingot cylinder, and penetrating through the titanium ingot, wherein the hole and the outer surface of the titanium ingot are concentric; filling an intermediate frequency furnace with inert protective gas, heating the titanium ingot to 950 ℃, extruding the outer surface of the titanium ingot by using ring rolling equipment, and expanding the inner hole to 2950mm to prepare a titanium cylinder blank ring; turning the whole surface of the titanium cylinder blank ring, wherein the inner diameter is 2960mm, the wall thickness is 58mm, and the inner and outer diameter surfaces are polished after turning, and the surface roughness is Ra0.5 mu m;
filling inert protective gas into the intermediate frequency furnace, heating the titanium cylinder blank ring to 800 ℃, sleeving the titanium cylinder blank ring into a spinning die, spinning when the titanium cylinder blank ring is cooled to 600 ℃, wherein the spinning is carried out for five times, the wall thickness deformation of the titanium cylinder blank ring is controlled within 18.8% each time, and a titanium cylinder is manufactured, and the wall thickness of the titanium cylinder is 20 mm;
filling an inert protective gas into the resistance furnace, heating the titanium cylinder to 470 ℃, preserving heat for 2 hours, and cooling to room temperature along with the furnace;
turning the inner diameter of the titanium cylinder to 2976mm, wherein the surface roughness is Ra3.2 mu m after turning, and plating silver on the inner wall of the titanium cylinder, and the thickness of the silver plating is 0.005 mm;
the cathode roller core comprises a copper cylinder body 2, a steel cylinder body 3, a steel side plate 4, a copper side plate 5, a copper pipe 8 and a steel shaft 9. The steel shaft 9 is arranged at the axis position of the steel cylinder body 3, the steel cylinder body 3 and the steel shaft 9 are fixed through the steel side plate 4, the copper cylinder body 2 is assembled on the outer side of the steel cylinder body 3 through heating interference, the copper pipe 8 is assembled on two sides of the steel shaft 9 through heating interference, and the copper side plate 5 is welded to connect the copper pipe 8 and the copper cylinder body 2 to form the cathode roller core.
Turning the outer surface of the roller core of the cathode roller to the diameter of 2980mm, and plating silver on the outer surface after polishing; the super-large diameter cathode roll comprises a cathode roll core, a titanium cylinder 1, a titanium side plate 6 and a titanium sheath 7. And filling inert protective gas into the resistance furnace, heating the titanium cylinder to 200 ℃, preserving heat for 1 hour, loading the cathode roller core into the titanium cylinder 1 in the hearth, and welding titanium side plates 6 and titanium sheaths 7 on two sides of the roller body to manufacture the cathode roller when the temperature of the hearth is reduced to room temperature.
Finally, turning the outer diameter of the cathode roller to 3000mm, and polishing the roller surface to Ra0.8 μm to prepare the cathode roller with the super-large diameter.
FIG. 2 is a gold phase diagram of a copper foil manufactured by a cathode roll having an outer diameter of 3000mm according to example 1 of the present invention, and it can be seen from FIG. 2 that the copper foil manufactured by the method has no defects and has uniform texture distribution.
The copper foil yield is CxLxSxIx ρ, S is dx3.14xlx0.49, the current density is I/S,
wherein C is a constant, and C ═ 3.056x10-13L is the width of the cathode roller, S is the surface area of the cathode roller participating in the reaction, I is the magnitude of the reaction current, rho is the copper density, and D is the outer diameter of the cathode roller;
according to the formula, the production efficiency of the copper foil can be improved by 20-40% under the condition that the current density is kept unchanged by the cathode roller with the outer diameter of more than 3000 mm.
Example 2:
the embodiment is a manufacturing method of a cathode roller with an outer diameter of 3500mm, which comprises the following steps:
selecting a TA1 pure titanium ingot, and turning the ingot to an outer diameter of 1000mm and a height of 1400 mm.
Heating the titanium ingot to 1160 ℃, forging the titanium ingot for three times respectively from the axial direction and the radial direction, wherein the deformation of the titanium ingot is 40%, the outer diameter of the titanium ingot is expanded to 1250mm by axial forging, and the height of the titanium ingot is expanded to about 985mm by radial forging; turning the titanium ingot to an outer diameter of 1230mm and a height of 950mm, removing all oxide skins on the surface of the titanium ingot, wherein the surface roughness of the turning process should not exceed Ra3.2 mu m; drilling a hole with the diameter of 250mm in the axis of the titanium ingot cylinder, and penetrating through the titanium ingot, wherein the hole and the outer surface of the titanium ingot are concentric; filling an intermediate frequency furnace with inert protective gas, heating the titanium ingot to 970 ℃, extruding the outer surface of the titanium ingot by using ring rolling equipment, and expanding the inner hole to 3460mm to prepare a titanium cylinder blank ring; turning the titanium cylinder blank ring to complete the surface, wherein the inner diameter is 3470mm, the wall thickness is 58mm, and the surface roughness of the inner diameter and the outer diameter is not more than Ra0.8 mu m after the turning;
filling inert protective gas into the intermediate frequency furnace, heating the titanium cylinder blank ring to 800 ℃, sleeving the titanium cylinder blank ring into a spinning die, spinning when the titanium cylinder blank ring is cooled to 600 ℃, wherein the spinning is carried out for five times, the wall thickness deformation of the titanium cylinder blank ring is controlled within 19% each time, and a titanium cylinder is manufactured, and the wall thickness of the titanium cylinder is 20.5 mm; filling an inert protective gas into the resistance furnace, heating the titanium cylinder to 485 ℃, preserving heat for 2 hours, and cooling to room temperature along with the furnace; turning the inner diameter of the titanium cylinder to 3476mm, wherein the surface roughness is Ra3.2 mu m after turning, and plating silver on the inner wall of the titanium cylinder, wherein the silver plating thickness is 0.005 mm;
the cathode roller core comprises a copper cylinder body 2, a steel cylinder body 3, a steel side plate 4, a copper side plate 5, a copper pipe 8 and a steel shaft 9. The steel shaft 9 is arranged at the axis position of the steel cylinder body 3, the steel cylinder body 3 and the steel shaft 9 are fixed through the steel side plate 4, the copper cylinder body 2 is assembled on the outer side of the steel cylinder body 3 in an interference fit mode through heating, the copper pipe 8 is assembled on the two sides of the steel shaft 9 in an interference fit mode through heating, and the copper side plate 5 is welded to connect the copper pipe 8 with the copper cylinder body 2 to form the cathode roller core.
Turning the outer surface of the roller core of the cathode roller to 3480mm in diameter, and plating silver on the outer surface after polishing; the super-large diameter cathode roll comprises a cathode roll core, a titanium cylinder 1, a titanium side plate 6 and a titanium sheath 7. And filling inert protective gas into the resistance furnace, heating the titanium cylinder to 200 ℃, preserving heat for 1 hour, loading the cathode roller core into the titanium cylinder 1 in the hearth, and welding titanium side plates 6 and titanium sheaths 7 on two sides of the roller body to manufacture the cathode roller when the temperature of the hearth is reduced to room temperature.
Finally, turning the outer diameter of the cathode roller to 3500mm, and polishing the roller surface to Ra0.8 mu m to prepare the cathode roller with the super-large diameter.
Example 3:
the embodiment is a manufacturing method of a cathode roller with an outer diameter of 4000mm, which comprises the following steps:
selecting a TA1 pure titanium ingot, and turning the ingot to 1250mm of outer diameter and 1800mm of height. Heating the titanium ingot to 1160 ℃, forging the titanium ingot for three times respectively from the axial direction and the radial direction, wherein the deformation of the titanium ingot is 40%, the outer diameter of the titanium ingot is expanded to 14800mm by the axial forging, and the height of the titanium ingot is about 985mm by the radial forging; turning the titanium ingot to an outer diameter of 1440mm and a height of 950mm, removing all oxide skins on the surface of the titanium ingot, wherein the surface roughness of the turning process should not exceed Ra3.2 mu m; drilling a hole with the diameter of 250mm in the axis of the titanium ingot cylinder, and penetrating through the titanium ingot, wherein the hole and the outer surface of the titanium ingot are concentric; filling an intermediate frequency furnace with inert protective gas, heating the titanium ingot to 970 ℃, extruding the outer surface of the titanium ingot by using ring rolling equipment, and expanding the inner hole to 3960mm to prepare a titanium cylinder blank ring; turning all the surfaces of the titanium cylinder blank ring, wherein the inner diameter is 3970mm, the wall thickness is 58mm, and the inner and outer diameter surfaces are polished after turning, and the surface roughness is not more than Ra0.8 mu m;
filling an intermediate frequency furnace with inert protective gas, heating the titanium cylinder blank ring to 800 ℃, sleeving the titanium cylinder blank ring into a spinning die, spinning when the titanium cylinder blank ring is cooled to 600 ℃, wherein the spinning is carried out for five times, the wall thickness deformation of the titanium cylinder blank ring is controlled within 19.2% each time, and a titanium cylinder is manufactured, and the wall thickness of the titanium cylinder is 21 mm; filling an inert protective gas into the resistance furnace, heating the titanium cylinder to 500 ℃, preserving heat for 2 hours, and cooling to room temperature along with the furnace; turning the inner diameter of the titanium cylinder to 3976mm, wherein the surface roughness is Ra1.6 mu m after turning, and plating silver on the inner wall of the titanium cylinder, and the silver plating thickness is 0.006 mm;
the cathode roller core comprises a copper cylinder body 2, a steel cylinder body 3, a steel side plate 4, a copper side plate 5, a copper pipe 8 and a steel shaft 9. The steel shaft 9 is arranged at the axis position of the steel cylinder body 3, the steel cylinder body 3 and the steel shaft 9 are fixed through the steel side plate 4, the copper cylinder body 2 is assembled on the outer side of the steel cylinder body 3 through heating interference, the copper pipe 8 is assembled on two sides of the steel shaft 9 through heating interference, and the copper side plate 5 is welded to connect the copper pipe 8 and the copper cylinder body 2 to form the cathode roller core.
Turning the outer surface of the roller core of the cathode roller to 3980mm in diameter, and plating silver on the outer surface after polishing;
the super-large diameter cathode roll comprises a cathode roll core, a titanium cylinder 1, a titanium side plate 6 and a titanium sheath 7. And filling inert protective gas into the resistance furnace, heating the titanium cylinder to 200 ℃, preserving heat for 1 hour, loading the cathode roller core into the titanium cylinder 1 in the hearth, and welding titanium side plates 6 and titanium sheaths 7 on two sides of the roller body to manufacture the cathode roller when the temperature of the hearth is reduced to room temperature.
Finally, turning the outer diameter of the cathode roller to 4000mm, and polishing the roller surface to Ra0.8 mu m to prepare the cathode roller with the super-large diameter.
The titanium cylinder is processed by adopting a high-temperature spinning mode, the method flow comprises the processes of forging, cerclage, spinning and the like, and the uniform and consistent microstructure of the cylinder body can be ensured because welding or other material adding processing modes are not used. The titanium cylinder produced by the method can produce cathode rollers with the outer diameter of 3000mm to 4000 mm.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. A method for manufacturing an oversized-diameter cathode roller is characterized by comprising the following steps:
s1, forging a titanium ingot: heating and forging a titanium ingot to ensure that the grain structure of the titanium ingot is uniformly distributed, and extruding the titanium ingot by ring rolling equipment to prepare a titanium cylinder blank ring;
s2, spinning a titanium cylinder: heating the titanium cylinder blank ring, sleeving the titanium cylinder blank ring into a spinning die, and performing spinning processing in five passes to obtain a titanium cylinder;
s3, manufacturing of the cathode roller: and heating the titanium cylinder to realize the interference assembly of the cathode roller core and the titanium cylinder, and turning to manufacture the cathode roller with the ultra-large diameter.
2. The method for manufacturing the ultra-large diameter cathode roll according to claim 1, wherein the step S1 specifically comprises the following steps:
s101, heating a cylindrical titanium ingot to 1100-1200 ℃, forging the cylindrical titanium ingot for three times respectively from the axial direction and the radial direction, axially forging the ingot to enable the deformation of the ingot to be higher than 30%, and radially forging the titanium ingot to enable the size of the titanium ingot to be recovered to the size before forging;
s102, turning the titanium ingot processed in the step S101 to remove oxide skin on the surface of the titanium ingot, wherein the turning surface roughness does not exceed Ra3.2 mu m;
s103, drilling an inner hole on the cylindrical shaft center of the titanium ingot turned in the step S102, wherein the diameter of the inner hole is 250mm, the inner hole penetrates through the titanium ingot, and the hole and the outer surface of the titanium ingot are concentric;
s104, filling inert protective gas into the intermediate frequency furnace, heating the titanium ingot obtained in the step S103 to 950-1000 ℃, extruding the outer surface of the titanium ingot by using ring rolling equipment and expanding an inner hole to prepare a titanium tube blank ring;
s105, turning and polishing the inner diameter and the outer diameter of the titanium tube blank ring obtained in the step S104, wherein the surface roughness is less than or equal to Ra0.8 mu m.
3. The method for manufacturing the ultra-large diameter cathode roll according to claim 1, wherein the step S2 is as follows:
filling an intermediate frequency furnace with inert protective gas, heating the titanium cylinder blank ring to 800 ℃, sleeving the titanium cylinder blank ring into a spinning die, spinning when the titanium cylinder blank ring is cooled to 600 ℃, and spinning for five times to obtain the titanium cylinder, wherein the wall thickness deformation of the titanium cylinder blank ring formed by spinning each time is 18.8% -19.2%.
4. The method for manufacturing the ultra-large diameter cathode roll according to claim 1, wherein the step S3 comprises the following steps before the interference assembly of the cathode roll core and the titanium cylinder:
s301: filling inert protective gas into the resistance furnace, heating the titanium cylinder prepared in the step S2 to 470-500 ℃, preserving heat for 2 hours, and cooling to room temperature along with the furnace;
s302: turning the inner wall of the titanium cylinder, wherein the surface roughness is less than or equal to Ra3.2 mu m after turning, and plating silver on the inner wall of the titanium cylinder, wherein the silver plating thickness is 0.005 mm.
5. The manufacturing method of the cathode roller with the ultra-large diameter according to claim 1, wherein the cathode roller core in the step S3 comprises a steel shaft (9), the steel shaft (9) is arranged at the axis position of a steel cylinder (3), the steel shaft (9) and the steel cylinder (3) are fixed through a steel side plate (4), the cathode roller core further comprises a copper cylinder (2) and a copper pipe (8), the copper cylinder (2) is assembled on the outer side of the steel cylinder (3) in a heating interference mode, the copper pipe (8) is assembled on two sides of the steel shaft (9) in the heating interference mode, and the copper cylinder (2) and the copper pipe (8) are connected through a welded copper side plate (5).
6. The method for manufacturing the cathode roller with the ultra-large diameter according to claim 1, wherein the specific method for interference assembling the roller core of the cathode roller and the titanium cylinder in the step S3 is as follows:
turning the outer surface of a roller core of the cathode roller, polishing the outer surface, plating silver on the outer surface, filling inert protective gas into a resistance furnace, heating a titanium cylinder (1) to 200 ℃, preserving heat for 1 hour, loading the roller core of the cathode roller into the titanium cylinder (1) in a hearth of the resistance furnace, and welding titanium side plates (6) and titanium sheaths (7) on two sides of a roller body to manufacture the cathode roller when the temperature of the hearth is reduced to room temperature.
7. The method for manufacturing the cathode roll with the ultra-large diameter as claimed in claim 1, wherein the outer diameter of the cathode roll is turned in step S3 to polish the roll surface to ra0.8 μm.
8. The method for manufacturing the cathode roller with the ultra-large diameter as recited in claim 1, wherein the method is suitable for the production of cathode rollers with the outer diameter of 3000mm to 4000 mm.
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| CN115074788A (en) * | 2022-07-22 | 2022-09-20 | 西安泰金工业电化学技术有限公司 | Large-specification steel roller structure |
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