CN116240592B - Cathode roller for electrolytic copper foil production and manufacturing method thereof - Google Patents
Cathode roller for electrolytic copper foil production and manufacturing method thereof Download PDFInfo
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- CN116240592B CN116240592B CN202211605877.4A CN202211605877A CN116240592B CN 116240592 B CN116240592 B CN 116240592B CN 202211605877 A CN202211605877 A CN 202211605877A CN 116240592 B CN116240592 B CN 116240592B
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 260
- 239000011889 copper foil Substances 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 238
- 239000010936 titanium Substances 0.000 claims abstract description 213
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 213
- 229910052802 copper Inorganic materials 0.000 claims abstract description 209
- 239000010949 copper Substances 0.000 claims abstract description 209
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 189
- 239000010959 steel Substances 0.000 claims abstract description 189
- 230000003068 static effect Effects 0.000 claims abstract description 28
- 230000003746 surface roughness Effects 0.000 claims abstract description 12
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 108
- 230000003014 reinforcing effect Effects 0.000 claims description 35
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000007747 plating Methods 0.000 claims description 21
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 18
- 229910052709 silver Inorganic materials 0.000 claims description 18
- 239000004332 silver Substances 0.000 claims description 18
- 238000003754 machining Methods 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 6
- ALKZAGKDWUSJED-UHFFFAOYSA-N dinuclear copper ion Chemical compound [Cu].[Cu] ALKZAGKDWUSJED-UHFFFAOYSA-N 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 230000004075 alteration Effects 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000009987 spinning Methods 0.000 claims description 4
- 238000004040 coloring Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 17
- 229910052744 lithium Inorganic materials 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 5
- 241000227287 Elliottia pyroliflora Species 0.000 description 7
- 230000004323 axial length Effects 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- OPHUWKNKFYBPDR-UHFFFAOYSA-N copper lithium Chemical compound [Li].[Cu] OPHUWKNKFYBPDR-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 239000004801 Chlorinated PVC Substances 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 229920000457 chlorinated polyvinyl chloride Polymers 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/37—Single-purpose machines or devices for grinding rolls, e.g. barrel-shaped rolls
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/46—Electroplating: Baths therefor from solutions of silver
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/04—Electroplating with moving electrodes
- C25D5/06—Brush or pad plating
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Electroplating Methods And Accessories (AREA)
Abstract
A cathode roller for producing electrolytic copper foil and a manufacturing method thereof are provided, wherein the cathode roller adopts a titanium-copper-steel three-layer composite structure, and the conducting path is all made of copper material. The contact surface of the copper cylinder and the titanium cylinder is provided with a V-shaped groove, so that the binding rate of the titanium cylinder and the copper cylinder is improved, and the uniformity of the current on the roller surface of the cathode roller is improved. The cathode roller adopts a conductive copper plate and a uniform conduction roller surface current of a uniform flow equalizing cylinder, the conduction paths of the current are basically the same, the problem of uneven roller surface current caused by the conduction paths is reduced, the thinning of a middle copper foil of a copper foil produced by the cathode roller with large width is avoided, the weight deviation of the produced 4.5 mu m lithium electric copper foil and 6 mu m lithium electric copper foil in the width and the circumferential direction is less than or equal to 1%, and the copper foil can be rolled up more than 50000m stably at one time. The invention meets the requirements that the static balance deviation of the cathode roller is less than or equal to 3Nm, the roller surface precision circle run-out and straightness accuracy are less than or equal to 0.05mm, and the roller surface roughness Ra is less than or equal to 0.2 mu m, and the manufacturing process is simple and economical, and the manufactured cathode roller works stably and can be used for producing copper foil for a long time.
Description
Technical Field
The invention relates to the field of electrolytic copper foil equipment manufacturing, in particular to a cathode roller with a diameter more than or equal to 3000mm and a width more than or equal to 1650mm for electrolytic copper foil production and a manufacturing method thereof.
Background
The lithium copper foil is used as a negative electrode current collector material of the lithium battery, is a conductive base material of the negative electrode of the lithium battery, and accounts for about 10-15% of the total amount of the lithium battery. Along with the development of the lithium battery towards the high energy density, the thickness of the lithium electric copper foil can be reduced to directly increase the energy density of the lithium battery, and compared with the 8-mu m lithium electric copper foil, the 6-mu m lithium electric copper foil and the 4.5-mu m lithium electric copper foil respectively improve the energy density of the lithium battery by 5% and 9%, and the lithium electric copper foil is developed towards thinner and thinner ultrathin in the future. The lithium electric copper foil is produced by an electrolytic method, copper ions in the copper sulfate electrolyte in the anode tank are continuously electrodeposited on the surface of a cathode roller rotating at a constant speed under the action of an externally applied direct current electric field, and the lithium electric copper foil is continuously produced through stripping, surface treatment and rolling after being deposited to a certain thickness.
The cathode roller is used as a carrier for generating electrolytic copper foil, and the diameter, the width, the conductivity, the roller surface current uniformity and the like of the cathode roller directly determine the quality and the production efficiency of the copper foil. At present, the cathode roller is mainly a cathode roller with the diameter of 2700mm, the conductivity and the productivity efficiency are basically close to theoretical design values, and the manufacturing of the cathode roller with larger diameter and larger width is more critical to the manufacturing of electrolytic copper foil. The current cathode roller is of a conductive structure at two ends, and when the cathode roller with the diameter of more than or equal to 3000mm and the breadth of more than or equal to 1650mm is manufactured, the problems that the thickness uniformity of the produced copper foil is poor, the thickness of the copper foil at the two ends is gradually decreased towards the center, the gram weight of the copper foil per unit area is out of tolerance, the length of the produced copper foil does not reach the standard, and the like, and particularly, the problem is more serious when the ultra-thin lithium battery copper foil is produced. The two end conductive structures adopted by the current cathode roller cannot be applied to cathode rollers with larger diameters and larger widths, so that the uniformity of roller surface current is poor, and the thickness performance of the produced copper foil does not reach the standard. The uniformity of the surface current of the cathode roller is represented by detecting the uniformity of the thickness of the copper foil produced by the cathode roller, the uniformity of the thickness of the copper foil is obtained by weighing samples with the same size on the surface of the copper foil, the weight deviation of each copper foil sample per unit area is counted, and the smaller the deviation is, the better the uniformity of the surface current is.
Disclosure of Invention
In order to overcome the defects of insufficient conductive uniformity of a cathode roller with the diameter more than or equal to 3000mm and the width more than or equal to 1650mm in the prior art, the invention provides a cathode roller for electrolytic copper foil and a manufacturing method thereof.
The cathode roller for producing the electrolytic copper foil comprises a steel shaft, a copper sleeve, a conductive ring, a bearing, a titanium sleeve, a titanium sheath, a titanium cylinder, a copper cylinder, a steel cylinder, a central steel plate, a supporting ring, a conductive copper plate, a titanium plate, an insulating ring, a titanium cover, a reinforcing ring, a current collecting copper plate and a current equalizing cylinder.
Wherein: titanium sheaths are respectively sleeved at two ends of the steel shaft; and each titanium sheath is sequentially sleeved with a copper sleeve, a conductive ring, a titanium sleeve, a bearing and a titanium sleeve from outside to inside, the copper sleeve is in interference connection with the steel shaft, and the balance is in tight fit connection.
The steel cylinder, the copper cylinder and the titanium cylinder are mutually nested to form a titanium-copper-steel three-layer composite structure of the cathode roller. Wherein the steel cylinder is sleeved on the steel shaft; a copper cylinder is sleeved on the outer circumferential surface of the steel cylinder, and the inner circumferential surface of the copper cylinder is attached to the outer circumferential surface of the steel cylinder; the outer circumferential surface of the copper cylinder is sleeved with a titanium cylinder, and the silver plating inner circumferential surface of the titanium cylinder is in interference fit with the silver plating outer circumferential surface of the copper cylinder.
The flow equalizing cylinder is sleeved on the steel shaft and distributed at two ends of the central steel plate, the outer circle of the outer end of the flow equalizing cylinder is fixedly connected with the end plate, the outer circle of the inner end of the flow equalizing cylinder is fixedly connected with the central steel plate, and a gap of 600-800 mm is reserved between the inner surface of the flow equalizing cylinder and the outer surface of the steel shaft, so that a gap of 500-600 is reserved between the outer surface of the flow equalizing cylinder and the outer surface of the steel cylinder.
Eight supporting rings are axially arranged between the flow equalizing cylinder and the steel cylinder and are equally divided into four groups, and annular conductive copper plates are respectively arranged between the two supporting rings of each group. The outer circumferential surface of each conductive copper plate is fixedly connected with the copper cylinder respectively; the inner circumferential surface of each conductive copper plate is fixedly connected with the outer circumferential surface of the flow equalizing cylinder.
Two current collecting copper plates are symmetrically distributed between the inner surface of the current equalizing cylinder and the steel shaft along the axial direction. The outer circumferential surfaces of the current collecting copper plates at the two ends are fixedly connected with the inner circumferential surface of the current equalizing cylinder respectively, and the inner circumferential surface is fixedly connected with the outer circumferential surface of the copper sleeve.
The steel cylinder is formed by connecting a plurality of small steel cylinders, and two ends of the steel cylinder are respectively positioned at the inner end of the titanium sleeve at one end; said outer circumferential surface of the copper cylinder is provided with a V-shaped groove,
the outer circumferential surface of each group of supporting rings is fixed on the inner surface of the steel cylinder, so that the inner circumferential surface of each group of supporting rings is fixed on the outer and inner surfaces of the flow equalizing cylinder.
And reinforcing rings are respectively arranged between the current collecting copper plates, the outer circumferential surfaces of the reinforcing rings are fixedly connected with the inner circumferential surfaces of the current equalizing cylinders, and the inner circumferential surfaces of the reinforcing rings are fixedly connected with the circumferential surfaces of the steel shafts or the outer circumferential surfaces of the copper sleeves according to the positions of the reinforcing rings.
The diameter of the cathode roller is 3000mm, and the length is 2000mm. To ensure uniformity of roll surface current, the cathode roll was divided equally into 5 segments in the axial direction by 4 sets of conductive copper plates located inside the cathode roll.
The specific process for manufacturing the cathode roller for producing the electrolytic copper foil provided by the invention comprises the following steps:
step 1, preparing a titanium cylinder: adopting a cold spinning process to spin and form a seamless titanium cylinder; the content of H in the titanium cylinder component is less than or equal to 0.01 percent; the structure is equiaxial alpha structure, the grain size grade is 11-12, and the twin crystal content is below 10%.
Step 2, copper sleeves at two ends of the hot-charging steel shaft: thermally mounting copper sleeves at two ends of the steel shaft; the assembly interference of the copper sleeves at the two ends and the steel shaft is required to be 0.2 mm.
Step 3, welding a central steel plate: the center steel is assembled and welded at the center position inside the width of the cathode roll.
Step 4, assembling and welding the flow equalizing cylinder: welding a reinforcing ring at the inner position corresponding to the conductive copper plate welded outside the flow equalizing cylinder by adopting MIG welding; the inner circles of the flow equalizing cylinders at the two ends are welded with the boss of the central steel plate.
Step 5, welding a current collecting copper plate: and welding a current collecting copper plate at the axial center position of the current equalizing cylinder at the two ends, and welding the current collecting copper plate with the copper sleeve.
Step 6, assembling and welding each steel cylinder, a conductive copper plate and a supporting ring: and sequentially assembling and welding steel cylinders from the central position to the two ends, assembling and welding supporting rings and conductive copper plates, welding triangular reinforcing ribs between the supporting rings and the steel cylinders, and connecting and fixing 2 supporting rings and 1 conductive copper plate. Wherein copper-copper and copper-steel welding adopts MIG welding, and steel welding adopts CO 2 And (5) gas shielded welding.
Step 7, welding end plates at two ends: welding the outer circle of the end plate with the seam allowance of the steel cylinder end part of the steel cylinder, adopting the welding of the inner circle and the copper sleeve, welding the outer circle of the flow equalizing cylinder with the end plate, respectively welding the end plate with the flow equalizing cylinder and the steel cylinder through the triangular reinforcing ribs, and welding the end plate with the copper sleeve through the large triangular reinforcing ribs. Wherein copper-copper and copper-steel welding employs MIG welding.
Step 8, assembling and welding an axial horizontal rib inside the steel cylinder: the circumference of the equally divided steel cylinder is 4 parts, and 4 horizontal ribs which are uniformly distributed in the circumference of the steel cylinder are respectively connected with the supporting ring, the central steel plate and the end plate by adopting CO2 gas shielded welding.
Step 9, heat treatment of the steel cylinder: the steel cylinder is provided with a plurality of welding seams, in order to reduce the later deformation of the cathode roller caused by welding stress, the outer circle of the steel cylinder is coated by adopting a heat treatment heating track, and the stress relief annealing treatment is carried out at 620+/-10 ℃ for 1.5 hours.
Step 10, machining the outer surface of the steel cylinder: in order to ensure the uniformity of the thickness of the additional copper cylinder, a numerical control machine is adopted to add the roughness Ra of less than or equal to 1.6 mu m, the circle run-out and the straightness of less than or equal to 0.05mm to the outer surface of the steel cylinder, and the conductive copper plate is ensured to be higher than the steel cylinder by more than 10mm.
Step 11, preparing a copper cylinder: winding a layer of copper strips on the surface of the machined steel cylinder; the thickness of the copper strip is 10mm, the width of the copper strip is 16mm, the copper strips at the two ends are welded with the two ends of the steel cylinder, and the copper strip is welded with the used conductive copper plate.
Step 12, mechanically processing the outer surface of the copper cylinder: the surface of the copper cylinder is added by a numerical control machine, so that the surface roughness Ra is less than or equal to 1.6 mu m, the circle run-out and the straightness are less than or equal to 0.05mm, the thickness of the copper cylinder is ensured to be 8mm, and the thickness deviation is less than or equal to 0.15mm. And a machine-added cutter is adopted, V-shaped grooves on the outer surface of the copper sleeve are machined, the angle alpha of the V-shaped grooves is ensured to be 35-45 degrees, the depth is 2-2.5 mm, the interval between the two grooves is 4-5 mm, and the V-shaped grooves are spirally distributed on the copper cylinder.
Step 13, primary static balance test: in order to ensure stable and uniform rotation of the cathode roller, a rolling static balance test method is adopted to perform a primary static balance test, and a static balance moment is ensured to be less than or equal to 3Nm by welding a balancing weight on an inner end plate.
Step 14, machining the inner surface of the titanium cylinder: the outer surface of the copper cylinder and the inner surface of the titanium cylinder are machined by a numerical control machine in sequence, so that the diameter of the inner circle of the titanium cylinder is smaller than the outer diameter of the copper cylinder by 3.5mm, the roughness Ra of the inner surface is less than or equal to 1.6 mu m, the circle run-out and the straightness are less than or equal to 0.05mm.
Step 15, silver plating: in order to increase conductivity, reduce contact resistance and reduce energy consumption, a brush plating process is adopted to plate silver on the outer circumferential surface of the machined copper cylinder and the inner circumferential surface of the titanium cylinder; the thickness of the plating layer is 5-8 mu m, and the plating layer is uniform and firmly attached.
Step 16, hot charging: preserving heat of the titanium cylinder with silver plated inner circle at 450 ℃ for 1.5 hours, and protecting argon in the heating process; and after heat preservation is finished, inserting the outer circle of the silver-plated copper cylinder into the titanium cylinder, and realizing assembly by utilizing the principle of thermal expansion and cold contraction.
Step 17, titanium welding: sequentially assembling a titanium plate and a titanium sleeve at one end, and completing welding of the titanium plate and the inner wall of the titanium cylinder and the titanium plate and the titanium sleeve by adopting TIG welding; assembling a titanium ring and a titanium sheath, ensuring that the end face of the outer end of the titanium ring is 5mm lower than the end face of the titanium cylinder, and adopting TIG welding to finish welding the titanium ring and the inner wall of the titanium cylinder, the titanium sheath and a titanium plate; and (3) carrying out titanium welding such as titanium plates, titanium sleeves, titanium cylinders, titanium rings and the like at the other ends of the welding wires, and carrying out surface coloring flaw detection on all titanium welding joints after the titanium welding is completed.
Step 18, heat treatment of the titanium cylinder: the stress-removing heat treatment of the titanium cylinder is carried out, the heat treatment is adopted to heat the caterpillar band to cover the outer circle of the titanium cylinder, and the stress-removing annealing treatment is carried out at 520+/-10 ℃ for 1.5 hours, so as to eliminate the residual stress on the surface of the titanium cylinder of the cathode roller, and solve the problems of collapse, stress corrosion and easy oxidation of the roller surface of the cathode roller in the use process.
Step 19, machining an outer circle of the titanium cylinder and an outer circle of the copper sleeve: machining the outer circle of the cathode roller titanium cylinder and the outer circle of the copper sleeve by adopting a numerical control machine, wherein the diameter phi of the outer circle of the cathode roller is 3000mm, the width of the outer circle of the cathode roller is 2000mm, the thickness of the wall of the titanium cylinder is 10 mm-10.5 mm, the right angle of the end part of the titanium cylinder is 5mm higher than the outer end of the titanium ring, the roughness Ra of the roller surface is 1.6, and the straightness and the circle runout are less than or equal to 0.05mm.
Step 20, static balance test: in order to ensure that the final static balance moment of the cathode roller is less than or equal to 3Nm, static balance weights are carried out on the weight ports of the titanium plates at the two ends of the cathode roller, the length of the weight bars is adjusted according to the weight amount, so that the final static balance moment of the cathode roller is less than or equal to 3Nm, the weight ports are blocked by a titanium cover after the weight is finished, the titanium cover is welded with the titanium plates, and the welding seam is subjected to surface dye inspection.
Step 21, air tightness test: and installing a barometer at one end of the airtight hole of the cathode roller steel shaft, introducing compressed nitrogen into one end of the airtight hole, maintaining the pressure for 2 hours under 0.04MPa, and checking the overall sealing performance of the cathode roller.
Step 22, polishing and grinding the outer circumferential surface of the titanium cylinder: on a cathode roller polishing and grinding machine, PVA grinding wheels of No. 40, no. 80, no. 120, no. 220, no. 320 and No. 600 are adopted to polish and grind the roller surface in sequence, so that the roller surface roughness Ra is less than or equal to 0.2 mu m, the circle run-out and the straightness are less than or equal to 0.05mm, and the surface has no chromatic aberration, mottle and pinhole defect.
When polishing the outer circumferential surface of the titanium cylinder:
when the 40#PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 400-450 r/min, the longitudinal feeding of the grinding wheel is 30-40 mm/min, the pressure is 0.25-0.3 MPa, the rotating speed of the cathode roller is 4.0-4.5 r/min, and the using amount of the grinding wheel is 2.
When the 80#PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 450-500 r/min, the longitudinal feeding of the grinding wheel is 25-30 mm/min, the pressure is 0.2-0.25 MPa, the rotating speed of the cathode roller is 4.5-5 r/min, and the using amount of the grinding wheel is 1.5.
When the 120# PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 450-500 r/min, the longitudinal feeding of the grinding wheel is 25-30 mm/min, the pressure is 0.2-0.25 MPa, the rotating speed of the cathode roller is 4.5-5 r/min, and the using amount of the grinding wheel is 1.5.
When the 220# PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 500-550 r/min, the longitudinal feeding of the grinding wheel is 20-25 mm/min, the pressure is 0.15-0.2 MPa, the rotating speed of the cathode roller is 5.5-6 r/min, and the using amount of the grinding wheel is 1.
When the 320#PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 500-550 r/min, the longitudinal feeding of the grinding wheel is 20-25 mm/min, the pressure is 0.15-0.2 MPa, the rotating speed of the cathode roller is 5.5-6 r/min, and the using amount of the grinding wheel is 0.5.
When the 600#PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 550-600 r/min, the longitudinal feeding of the grinding wheel is 15-20 mm/min, the pressure is 0.1-0.15 MPa, the rotating speed of the cathode roller is 6-6.5 r/min, and the using amount of the grinding wheel is 0.5.
Step 23, fitting installation: and the insulating rings, the titanium screws, the bearings and the conducting rings at the two ends of the cathode roller are sequentially arranged.
Thus, the manufacturing of the cathode roller is completed.
The cathode roller provided by the invention adopts a titanium-copper-steel three-layer composite structure, and the conducting paths are all made of copper materials, so that the energy consumption is lower. The contact surface of the copper cylinder and the titanium cylinder is provided with a V-shaped groove, so that the binding rate of the titanium cylinder and the copper cylinder is greatly improved, and the uniformity of the current on the roller surface of the cathode roller is improved. Meanwhile, the cathode roller adopts a mode of conducting electricity at the center inside, a plurality of groups of conductive copper plates and 2 pieces of current equalizing cylinders are adopted to uniformly conduct roller surface currents, the conducting paths through which the currents pass are basically the same, the problem of uneven roller surface currents caused by the conducting paths is solved, the thinning of middle copper foils of copper foils produced by the cathode roller with large breadth is avoided, the weight deviation of unit area of the produced 4.5 mu M and 6 mu M lithium copper foils in the breadth and the circumferential direction is less than or equal to 1%, the stable rolling of the copper foils is achieved at one time by more than 50000M, and the S surface and the M surface of the copper foils meet the cathode requirement of a lithium battery. The manufacturing method of the cathode roller ensures the key parameters of 0-0.5 mm of thickness deviation of the titanium cylinder, 0-0.15 mm of thickness deviation of the copper cylinder, more than or equal to 3.5mm of interference and the like which influence the conductivity uniformity of the cathode roller, meets the requirements of less than or equal to 3Nm of static balance deviation of the cathode roller, less than or equal to 0.05mm of roller surface precision circle run-out and straightness and less than or equal to 0.2 mu m of roller surface roughness Ra, has simple and economic manufacturing flow, and can be used for producing copper foil for a long time, and the manufactured cathode roller works stably.
Drawings
Fig. 1 is a cathode roll profile view: wherein fig. 1a is a front view and fig. 1b is a left side view.
Fig. 2 is a schematic view of the structure of the cathode roll.
FIG. 3a is a view from A-A in FIG. 2; FIG. 3B is a view from B-B in FIG. 2; fig. 3c is an enlarged view of part of the area i in fig. 2.
FIG. 4 is a schematic structural view of a center steel plate; wherein fig. 4a is a cross-sectional view of C-C in fig. 4b, and fig. 4b is a front view.
FIG. 5 is a schematic structural view of an end plate; wherein, FIG. 5a is a D-D sectional view in FIG. 5b, and FIG. 5b is a front view.
FIG. 6 is a schematic view of the inside copper cylinder of the cathode roll; wherein, FIG. 6a is a schematic diagram showing the distribution of V-shaped grooves on the copper cylinder, and FIG. 6b is an enlarged view of part II in FIG. 6a
Fig. 7 is an SEM image of copper foil produced by the cathode roll of the present invention: fig. 7a is an SEM image of the M-side of the copper foil, and fig. 7b is an SEM image of the S-side of the copper foil.
In the figure:
1. a steel shaft; 2. a copper sleeve; 3. a conductive ring; 4. a bearing; 5. a titanium sleeve; 6. a titanium sheath; 7. a titanium cylinder; 8. a copper cylinder; 9. a steel cylinder; 10. a center steel plate; 11. reinforcing ribs; 12. a support ring; 13. a conductive copper plate; 14. an end plate; 15. a titanium plate; 16. an insulating ring; 17. a titanium screw; 18. a titanium ring; 19. a titanium cover; 20. a weight bar; 21. horizontal ribs; 22. a bolt; 23. a reinforcing ring; 24. a current collecting copper plate; 25. and a flow equalizing cylinder.
Detailed Description
The embodiment is a cathode roller with the diameter of 3000mm and the width of 2000mm, which comprises a steel shaft 1, a copper 2 sleeve, a conducting ring 3, a bearing 4, a titanium sleeve 5, a titanium sheath 6, a titanium cylinder 7, a copper cylinder 8, a steel cylinder 9, a central steel plate 10, 1 reinforcing ribs 11, a supporting ring 12, a conducting copper plate 13 and an end plate 14; a titanium plate 15; an insulating ring 16; titanium screw 17, titanium ring 18, titanium lid 19, counter weight stick 20, horizontal muscle 21, bolt 22, strengthening ring 23, current collection copper 24, flow equalizing section of thick bamboo 25. Wherein: two ends of the steel shaft are respectively sleeved with a titanium sheath 6; the copper sleeves 2, the conducting rings 3, the titanium sleeves 5, the bearings 4 and the titanium sleeves 5 are sequentially sleeved on the titanium sheaths from outside to inside, the copper sleeves 2 are in interference connection with the steel shaft 1, and the rest are in tight fit connection.
The steel cylinder 9, the copper cylinder 8 and the titanium cylinder 7 are mutually nested to form a titanium-copper-steel three-layer composite structure of the cathode roller. The steel cylinder 9 is sleeved on the steel shaft 1 and is formed by connecting a plurality of small steel cylinders, and two ends of the steel cylinder are respectively positioned at the inner end of the titanium sleeve 5 at one end; a copper cylinder 8 is sleeved on the outer circumferential surface of the steel cylinder, and the inner circumferential surface of the copper cylinder is attached to the outer circumferential surface of the steel cylinder; the outer circumferential surface of the copper cylinder is provided with a V-shaped groove, the outer circumferential surface of the copper cylinder is sleeved with a titanium cylinder 7, and the silver plating inner circumferential surface of the titanium cylinder is in interference fit with the silver plating outer circumferential surface of the copper cylinder.
The flow equalizing cylinder 25 is sleeved on the steel shaft 1 and distributed at two ends of the central steel plate 10, the outer circle of the outer end of the flow equalizing cylinder is fixedly connected with the end plate 14, the outer circle of the inner end of the flow equalizing cylinder is fixedly connected with the central steel plate, a space of 600-800 mm is reserved between the inner surface of the flow equalizing cylinder and the outer surface of the steel shaft 1, and a space of 500-600 is reserved between the outer surface of the flow equalizing cylinder and the outer surface of the steel cylinder 9.
Eight support rings 12 are axially arranged between the flow equalizing cylinder 25 and the steel cylinder 9 and equally divided into four groups, and the outer circumferential surfaces of the support rings of each group are fixed on the inner surface of the steel cylinder, so that the inner circumferential surfaces of the support rings of each group are fixed on the outer inner surface of the flow equalizing cylinder. Between the two supporting rings of each group there is a respective annular conductive copper plate 13. The outer circumferential surface of each conductive copper plate is fixedly connected with the copper cylinder 8; the inner circumferential surface of each of the conductive copper plates is fixedly connected with the outer circumferential surface of the flow equalizing cylinder 25, respectively.
Two current collecting copper plates 24 are symmetrically distributed between the inner surface of the current equalizing cylinder 25 and the steel shaft 1 along the axial direction. The outer circumferential surfaces of the copper plates at both ends are respectively fixedly connected with the inner circumferential surface of the flow equalizing cylinder 25, and the inner circumferential surface is fixedly connected with the outer circumferential surface of the copper sleeve 2.
Between the collecting copper plates 24, there are reinforcing rings 23, respectively, whose outer circumferential surfaces are fixedly connected to the inner circumferential surfaces of the flow equalizing cylinders 25, respectively, and which are fixedly connected to the circumferential surfaces of the steel shaft 1 or the copper bush 2, respectively, depending on the location.
In this embodiment, the diameter of the cathode roller is 3000mm and the length is 2000mm. To ensure the uniformity of the roll surface current, 4 groups of conductive copper plates 13 are shared inside the cathode roll, and the cathode roll is divided into 5 sections in an axial direction.
To enable the cathode roll rated foil current to reach 80kA, the thickness of the shell of the conductive copper cylinder 8 is 8mm. The thickness of the conductive copper plate 13 was 8mm, the outer diameter was identical to the conductive copper cylinder, and the inner diameter was 1602mm. The flow equalizing cylinder 29 has an outer diameter of 1600mm, an inner diameter of 1576mm and an axial length of 944mm. The collector copper plate 28 has an outer diameter of 1576mm, an inner diameter of 400mm and a thickness of 45mm. The outer end of the copper bush 2 is a small-diameter section, the outer diameter of the small-diameter section is 380mm, the inner diameter of the small-diameter section is 260mm, and the axial length of the small-diameter section is 600mm; the inner end of the copper sleeve is a large-diameter section, the outer diameter of the large-diameter section and the small-diameter section is 400mm, the inner diameter of the large-diameter section and the small-diameter section is 260mm, and the axial length of the large-diameter section and the small-diameter section is 780mm;
in the embodiment, all copper materials are annealed oxygen-free copper T2, the purity is more than 99.95%, and all copper and copper part contact parts are welded.
The steel shaft 1 is made of Q355 alloy steel, the diameters of the small diameters at the two ends of the steel shaft are 260mm, and the diameter of the large diameter in the middle of the steel shaft is 280mm. The copper bush 2 is thermally installed at the small diameter position of the two ends, and the assembly interference of the copper bush sections is enabled to meet 0.2-0.3 mm.
The central steel plate 10 is made of Q235, has an outer diameter of 2922mm, an inner diameter of 282mm and a thickness of 16mm; the bosses at the two ends of the central steel plate are 10mm in height, the outer diameter of each boss is 1574mm, the central steel plate 10 is welded with the outer circle of the steel shaft 1, and medium triangular reinforcing ribs are uniformly distributed between the central steel plate and the steel shaft 1.
The reinforcing ring 23 is made of Q235, and has an outer diameter of 1574mm, an inner diameter 1474mm and a thickness of 10mm. The inner circles of the flow equalizing cylinders at the two ends are welded with the bosses of the central steel plate 10, and the middle triangular reinforcing ribs uniformly distributed between the central steel plate and the flow equalizing cylinders are welded. The supporting ring 12 is made of Q235, has a wall thickness of 10mm, an outer diameter of 2934mm and an inner diameter of 1602mm, and is welded with the steel cylinder 9 on the outer circumferential surface and the flow equalizing cylinder 25 on the inner circumferential surface.
The current collecting copper plate 24 has an outer diameter of 1576mm, an inner diameter of 400mm and a thickness of 45mm. And a current collecting copper plate 24 is welded at the axial center of the current equalizing cylinder 25 at the two ends, and the current collecting copper plate is welded and connected with the copper sleeve 2.
The steel cylinder 9 is composed of a plurality of sections of short steel cylinders, the short steel cylinder is made of Q235, the outer diameter is 2964mm, the inner diameter is 2924mm, the length is 385mm, and the inner surfaces of the two ends are provided with rabbets of 12mm multiplied by 12mm. The segmented steel cylinders 9 are welded from the center to the two ends in sequence, the supporting rings 12 and the conductive copper plates 13 are welded, the triangular reinforcing ribs 11 between the supporting rings and the steel cylinders are welded, and the 2 supporting rings 12 and the 1 conductive copper plates 13 are connected and fixed by bolts.
The end plate 14 is made of Q235, the outer diameter is 2934mm, the inner diameter is 380mm, the outer diameter of the boss is 1574mm, 16 threaded through holes are uniformly distributed on a scale circle of phi 2300mm, the outer circumferential surface of the welding end plate 14 is welded with a spigot of the end part of the steel cylinder 9, and the inner circumferential surface is welded with the outer circumferential surface of the copper sleeve 2.
The excircle of the current equalizing copper cylinder 25 is in welded connection with an end plate, the end plate is respectively in welded connection with the current equalizing cylinder 25 and the steel cylinder 9 through triangular reinforcing ribs 11, and the end plate is in welded connection with the copper sleeve 2 through large triangular reinforcing ribs. The reinforcing rib 21 is made of Q235, has a wall thickness of 10mm,
the width is 100mm, the length of 4 pieces is 383mm, the length of 2 pieces is 190mm, the circumference of the steel cylinder is equally divided into 4 parts, the reinforcing ribs are axially arranged and welded in the steel cylinder 9, and the 4 horizontal ribs 21 which are uniformly distributed in the circumferential direction in the steel cylinder are respectively welded and connected with the supporting ring 12, the central steel plate 10 and the end plate 14. The copper cylinder 8 is made of T2, a copper strip with the thickness of 10mm and the width of 16mm is wound on the steel cylinder 9, and the copper strip is welded with the steel cylinders 9 at the two ends and the conductive copper plate 13; the copper cylinder is mechanically added on the surface of the copper cylinder, so that the surface roughness Ra is less than or equal to 1.6 mu m, the circle run-out and the straightness are less than or equal to 0.05mm, the thickness of the copper cylinder is ensured to be 8mm, the thickness deviation is less than or equal to 0.15mm, V-shaped grooves are formed on the outer surface of the copper cylinder, the angle alpha of the V-shaped grooves is ensured to be 35-45 degrees, the depth is 2-2.5 mm, the interval between the two grooves is 4-5 mm, and the V-shaped grooves are spirally distributed on the copper cylinder. The titanium cylinder 7 is made of TA1, and is formed by spinning or coil welding, so that the content of the component H is less than or equal to 0.01%, the structure is an equiaxial alpha structure, the grain size grade is 11-12, and the twin crystal content is less than 10%; according to the outer diameter size of the machined copper cylinder 8, the inner surface of the machined titanium cylinder 7 ensures that the inner diameter of the titanium cylinder is 3.5mm smaller than the outer diameter of the copper cylinder, and the inner surface roughness Ra is less than or equal to 1.6 mu m, the circle run-out and the straightness are less than or equal to 0.05mm. Silver plating is carried out on the outer circle of the machined copper cylinder 8 and the inner circle of the titanium cylinder 9, the thickness of the plating layer is ensured to be 5-8 mu m, the titanium cylinder with the silver plated inner circle is insulated for 1.5 hours at the temperature of 450 ℃, and argon is protected in the heating process; after the heat preservation is finished, the excircle of the silver-plated copper cylinder 8 is inserted into the titanium cylinder 7, and the assembly is realized by utilizing the principle of thermal expansion and cold contraction. The titanium plate 15, the titanium ring 18, the titanium sleeve 5, the titanium sheath 6, the titanium cover 19 and the titanium screw 17 are made of TA2, the outer diameter of the titanium plate is phi 2978mm, the inner diameter of the titanium plate is phi 396mm, the wall thickness of the titanium plate is 6mm, and 16 phi 40 through holes are uniformly distributed on a phi 2300mm pitch circle on the titanium plate; the outer diameter phi 394mm, the inner diameter phi 380mm and the length 400mm of the titanium sleeve 5; the outer diameter phi 2978mm, the inner diameter phi 2878mm and the thickness of the titanium ring 18 are 25mm, and M10 threaded holes are uniformly distributed on a scale circle of phi 2940mm and have the depth of 15mm; the outer diameter phi 496mm, the inner diameter phi 296mm and the thickness 8mm of the titanium sheath 6; sequentially assembling a titanium plate 15 and a titanium sleeve 5 at one end, wherein the positions of M36 on the end plate 14 and 16 phi 40 through holes of the titanium plate are the same, and welding the titanium plate with the inner wall of the titanium cylinder 7 and the titanium plate and the titanium sleeve 5 by adopting TIG welding; and assembling the titanium ring 18 and the titanium sheath 6, ensuring that the end face of the outer end of the titanium ring is 5mm lower than the end face of the titanium cylinder 7, and adopting TIG welding to finish the welding of the titanium ring 18 and the inner wall of the titanium cylinder 7, the titanium sheath 6 and the titanium plate 15. Machining the outer circle of the titanium cylinder and the outer circle of the copper sleeve on a lathe to finish the machining of the outer circle of the cathode roller titanium cylinder 7 and the outer circle of the copper sleeve 2, and ensuring that the diameter phi of the outer circle of the cathode roller is 3000mm, the width of the outer circle of the cathode roller is 2000mm, the thickness of the wall of the titanium cylinder is 10 mm-10.5 mm, the right angle of the end part of the titanium cylinder is 5mm higher than the outer end of the titanium ring, the roughness Ra1.6 of the roller surface, the straightness and the circle runout are less than or equal to 0.05mm. Static balance weight is carried out on the weight ports of the titanium plates 15 at the two ends of the cathode roller, the weight rod 20 is an M36 screw made of Q235, the length of the weight rod is adjusted according to the weight amount, so that the final static balance moment of the cathode roller is less than or equal to 3Nm, the weight ports are blocked by the titanium cover 19 after the weight is completed, the titanium cover is welded with the titanium plates 15, and the welding seam is subjected to surface dye check. On a special grinding machine for polishing and grinding a cathode roller, a PVA grinding wheel is adopted to polish and grind the roller surface, so that the roller surface roughness Ra is less than or equal to 0.2 mu m, the circle run-out and the straightness are less than or equal to 0.05mm, and the surface has no defects of chromatic aberration, mottle, pinholes and the like. The insulating rings 16 at the two ends of the cathode roller and the insulating rings are made of CPVC, the outer diameter is phi 3000mm, the inner diameter is phi 2880mm, and stepped through holes are uniformly distributed on a scale circle of phi 2940 mm: phi 20mm deep 20mm through holes phi 12 mm; the insulating ring 16 is mounted to the two end titanium rings using titanium screws 17. The conducting ring 3 is made of T2, has the inner diameter of phi 380mm, the outer diameter of phi 520mm, the thickness of 120mm, the distance between two adjacent conducting rings is 60mm, the installation center distance is 2830mm, and the inner circle contacted with the sleeve and the outer circle of the copper sleeve 2 are plated with silver by 5-8 mu m. The mounting center distance of the bearing 4 is 2320mm.
The embodiment also provides a manufacturing method of the cathode roller for producing the electrolytic copper foil, and the specific manufacturing process of the cathode roller with the diameter of 3000mm multiplied by 2000mm is as follows:
step 1, preparing a titanium cylinder: adopting a conventional cold spinning process to spin and form a seamless titanium cylinder, wherein the content of H in the titanium cylinder is less than or equal to 0.01%; the structure is equiaxial alpha structure, the grain size grade is 11-12, and the twin crystal content is below 10%.
Step 2, copper sleeves at two ends of the hot-charging steel shaft: the assembly interference of the copper bush 2 and the steel shaft 1 is detected to meet 0.2mm, and the copper bush is heated to 300 ℃ in a conventional hot-charging mode, so that the copper bushes at the two ends are hot-charged respectively.
Step 3, welding a central steel plate: cathode rollerThe center steel plate 10 is assembled at the center position in the width of the inner part by adopting conventional CO 2 The gas shielded welding is used for welding the central steel plate and the steel shaft 1, and the reinforcing ribs are welded at the joint of the central steel plate and the steel shaft.
Step 4, assembling and welding the flow equalizing cylinder: the reinforcing ring 23 is welded at the inner position corresponding to the conductive copper plate 13 welded outside the flow equalizing barrel 25 by adopting conventional MIG welding; the inner circles of the flow equalizing cylinders at the two ends are welded with the bosses of the central steel plate 10, and the middle triangular reinforcing ribs uniformly distributed between the central steel plate and the flow equalizing cylinders are welded.
Step 5, welding a current collecting copper plate: and a current collecting copper plate 24 is welded at the axial center position of the two-end current equalizing cylinder 25 by adopting conventional MIG welding, and the current collecting copper plate is welded and connected with the copper sleeve 2.
Step 6, assembling and welding each steel cylinder, a conductive copper plate and a supporting ring: the steel cylinders 9 are sequentially welded from the center to the two ends, the supporting rings 12 and the conductive copper plates 13 are welded, the triangular reinforcing ribs 11 between the supporting rings and the steel cylinders are welded, and the 2 supporting rings 12 and the 1 conductive copper plates 13 are connected and fixed by bolts 22. Wherein copper-copper and copper-steel welding adopts conventional MIG welding, and steel welding adopts conventional CO2 gas shielded welding.
Step 7, welding end plates at two ends: the outer circle of the end plate 14 is welded with the spigot of the steel cylinder end part of the steel cylinder 9, the inner circle is welded with the copper sleeve 2, the outer circle of the flow equalizing cylinder 25 is welded with the end plate, the end plate is respectively welded with the flow equalizing cylinder 29 and the steel cylinder 9 through the triangular reinforcing ribs 11, and the end plate is welded with the copper sleeve 2 through the large triangular reinforcing ribs 26. Wherein copper-copper and copper-steel welding adopts conventional MIG welding, and steel welding adopts conventional CO2 gas shielded welding.
Step 8, assembling and welding an axial horizontal rib inside the steel cylinder: the circumference of the equally divided steel cylinder is 4 parts, and 4 horizontal ribs 21 which are uniformly distributed in the circumferential direction inside the steel cylinder are respectively connected with the support ring 12, the central steel plate 10 and the end plate 14 by adopting conventional CO2 gas shielded welding.
Step 9, heat treatment of the steel cylinder: the steel cylinder 9 is provided with a plurality of welding seams, in order to reduce the later deformation of the cathode roller caused by welding stress, the outer circle of the steel cylinder is coated by adopting a conventional heat treatment heating track, and the stress relief annealing treatment is carried out at 620+/-10 ℃ for 1.5 hours.
Step 10, machining the outer surface of the steel cylinder: in order to ensure the uniformity of the thickness of the additional copper cylinder, the outer surface of the steel cylinder 9 is added to the roughness Ra less than or equal to 1.6 mu m, the circle run-out and the straightness are less than or equal to 0.05mm by adopting a conventional numerical control machine, and the conductive copper plate 13 is ensured to be higher than the steel cylinder 9 by more than 10mm.
Step 11, preparing a copper cylinder 8: winding a layer of copper strips on the surface of the machined steel cylinder 9; the thickness of the copper strip is 10mm, the width is 16mm, the copper strips at two ends are welded with two ends of the steel cylinder 9, and the copper strips are welded with the used conductive copper plate 13.
Step 12, mechanically processing the outer surface of the copper cylinder: the surface of the copper cylinder 8 is added by a conventional numerical control machine, so that the surface roughness Ra is less than or equal to 1.6 mu m, the circle run-out and the straightness are less than or equal to 0.05mm, the thickness of the copper cylinder is ensured to be 8mm, and the thickness deviation is less than or equal to 0.15mm. And a machine-added cutter is adopted, V-shaped grooves on the outer surface of the copper sleeve are machined, the angle alpha of the V-shaped grooves is ensured to be 35-45 degrees, the depth is 2-2.5 mm, the interval between the two grooves is 4-5 mm, and the V-shaped grooves are spirally distributed on the copper cylinder.
Step 13, primary static balance test: in order to ensure stable and uniform rotation of the cathode roller, a conventional rolling static balance test method is adopted to perform a primary static balance test, and a static balance moment is ensured to be less than or equal to 3Nm by welding a balancing weight on an inner end plate.
Step 14, machining the inner surface of the titanium cylinder: the outer surface of the copper cylinder 8 and the inner surface of the titanium cylinder 7 are sequentially machined by adopting a conventional numerical control machine, so that the diameter of the inner circle of the titanium cylinder is 3.5mm smaller than the outer diameter of the copper cylinder, the roughness Ra of the inner surface is less than or equal to 1.6 mu m, the circle run-out and the straightness are less than or equal to 0.05mm.
Step 15, silver plating: in order to increase conductivity, reduce contact resistance and reduce energy consumption, silver plating is carried out on the outer circumferential surface of the machined copper cylinder 8 and the inner circumferential surface of the titanium cylinder 9 by adopting a conventional brush plating process; the thickness of the plating layer is 5-8 mu m, and the plating layer is uniform and firmly attached.
Step 16, hot charging: preserving heat of the titanium cylinder with silver plated inner circle at 450 ℃ for 1.5 hours, and protecting argon in the heating process; after the heat preservation is finished, the excircle of the silver-plated copper cylinder 8 is inserted into the titanium cylinder 7, and the assembly is realized by utilizing the principle of thermal expansion and cold contraction.
Step 17, titanium welding: sequentially assembling a titanium plate 15 and a titanium sleeve 5 at one end, and completing welding of the titanium plate and the inner wall of the titanium cylinder 7 and the titanium plate and the titanium sleeve 5 by adopting conventional TIG welding; the titanium ring 18 and the titanium sheath 6 are assembled, the outer end face of the titanium ring is guaranteed to be 5mm lower than the end face of the titanium cylinder 7, and TIG welding is adopted to finish welding of the titanium ring 18 and the inner wall of the titanium cylinder 7, and the titanium sheath 6 and the titanium plate 15; and (3) carrying out titanium welding such as titanium plates, titanium sleeves, titanium cylinders, titanium rings and the like at the other ends of the welding wires, and carrying out surface coloring flaw detection on all titanium welding joints after the titanium welding is completed.
Step 18, heat treatment of the titanium cylinder: the stress-removing heat treatment of the titanium cylinder adopts the conventional heat treatment to heat the crawler belt to cover the outer circle of the titanium cylinder, and the stress-removing annealing treatment is carried out at 520+/-10 ℃ for 1.5 hours so as to eliminate the residual stress on the surface of the titanium cylinder of the cathode roller and solve the problems of collapse, stress corrosion and easy oxidation of the roller surface of the cathode roller in the use process.
Step 19, machining an outer circle of the titanium cylinder and an outer circle of the copper sleeve: the processing of the outer circle of the cathode roller titanium cylinder 7 and the outer circle of the copper sleeve 2 is completed by adopting a conventional numerical control machine, so that the diameter phi of the outer circle of the cathode roller is 3000mm, the width of the outer circle of the cathode roller is 2000mm, the thickness of the titanium cylinder wall is 10 mm-10.5 mm, the right angle of the end part of the titanium cylinder is 5mm higher than the outer end of the titanium ring, the roller surface roughness Ra1.6, the straightness and the circle runout are less than or equal to 0.05mm.
Step 20, static balance test: in order to ensure that the final static balance moment of the cathode roller is less than or equal to 3Nm, static balance weight is carried out on the weight ports of the titanium plates at the two ends of the cathode roller, the length of the weight rod 20 is adjusted according to the weight amount, so that the final static balance moment of the cathode roller is less than or equal to 3Nm, the weight ports are blocked by the titanium cover 19 after the weight is finished, the titanium cover is welded with the titanium plate 15, and the welding seam is subjected to surface dye inspection.
Step 21, air tightness test: and installing a barometer at one end of the airtight hole of the cathode roller steel shaft, introducing compressed nitrogen into one end of the airtight hole, maintaining the pressure for 2 hours under 0.04MPa, and checking the overall sealing performance of the cathode roller.
Step 22, polishing and grinding the outer circumferential surface of the titanium cylinder: on a cathode roller polishing and grinding machine, PVA grinding wheels of No. 40, no. 80, no. 120, no. 220, no. 320 and No. 600 are adopted to polish the roller surface in sequence, and polishing parameters are shown in the following table, so that the roller surface roughness Ra is less than or equal to 0.2 mu m, the circle run-out and the straightness are less than or equal to 0.05mm, and the surface has no defects of chromatic aberration, mottle, pinholes and the like.
Step 23, fitting installation: the two ends of the cathode roller are provided with insulating rings 16, titanium screws 17, bearings 4 and conducting rings 3 in sequence.
Thus, the manufacturing of the cathode roller is completed.
Claims (7)
1. The cathode roller for producing the electrolytic copper foil is characterized by comprising a steel shaft (1), a copper sleeve (2), a conductive ring (3), a bearing (4), a titanium sleeve (5), a titanium sheath (6), a titanium cylinder (7), a copper cylinder (8), a steel cylinder (9), a central steel plate (10), a supporting ring (12), a conductive copper plate (13), a titanium plate (15), an insulating ring (16), a titanium ring (18), a titanium cover (19), a reinforcing ring (23), a current collecting copper plate (24) and a current equalizing cylinder (25);
wherein: two ends of the steel shaft are respectively sleeved with a titanium sheath (6); a copper sleeve (2), a conductive ring, a titanium sleeve (5), a bearing and the titanium sleeve (5) are sequentially sleeved on each titanium sheath from outside to inside, the copper sleeve (2) is in interference connection with the steel shaft (1), and the rest is in tight fit connection;
the steel cylinder (9), the copper cylinder (8) and the titanium cylinder (7) are mutually nested to form a titanium-copper-steel three-layer composite structure of the cathode roller; wherein the steel cylinder (9) is sleeved on the steel shaft (1); a copper cylinder (8) is sleeved on the outer circumferential surface of the steel cylinder, and the inner circumferential surface of the copper cylinder is attached to the outer circumferential surface of the steel cylinder; the outer circumferential surface of the copper cylinder is sleeved with a titanium cylinder (7), and the silver plating inner circumferential surface of the titanium cylinder is in interference fit with the silver plating outer circumferential surface of the copper cylinder;
the flow equalizing cylinder (25) is sleeved on the steel shaft (1) and distributed at two ends of the central steel plate (10), the outer circle of the outer end of the flow equalizing cylinder is fixedly connected with the end plate (14), the outer circle of the inner end of the flow equalizing cylinder is fixedly connected with the central steel plate, and a gap of 600-800 mm is reserved between the inner surface of the flow equalizing cylinder and the outer surface of the steel shaft (1), and a gap of 500-600 mm is reserved between the outer surface of the flow equalizing cylinder and the outer surface of the steel cylinder (9);
eight supporting rings (12) are axially arranged between the flow equalizing cylinder (25) and the steel cylinder (9) and are uniformly divided into four groups, and annular conductive copper plates (13) are respectively arranged between the two supporting rings of each group; the outer circumferential surface of each conductive copper plate is fixedly connected with the copper cylinder (8) respectively; the inner circumferential surface of each conductive copper plate is fixedly connected with the outer circumferential surface of the flow equalizing cylinder (25);
two current collecting copper plates (24) are symmetrically distributed between the inner surface of the current equalizing cylinder (25) and the steel shaft (1) along the axial direction; the outer circumferential surfaces of the current collecting copper plates at the two ends are respectively fixedly connected with the inner circumferential surface of the current equalizing cylinder (25), and the inner circumferential surface is fixedly connected with the outer circumferential surface of the copper sleeve (2).
2. The cathode roll for producing electrolytic copper foil according to claim 1, wherein the steel cylinder (9) is formed by connecting a plurality of small steel cylinders, and both ends of the steel cylinder are respectively positioned at the inner ends of the titanium sleeves (5) at one end; the outer circumferential surface of the copper cylinder is provided with a V-shaped groove.
3. The cathode roll for electrolytic copper foil production according to claim 1, wherein the outer circumferential surfaces of the supporting rings are fixed to the inner surface of the steel cylinder, and the inner circumferential surfaces of the supporting rings of each group are fixed to the outer inner surface of the flow equalizing cylinder.
4. Cathode roll for electrolytic copper foil production according to claim 1, characterized in that a reinforcing ring (23) is provided between each of the collecting copper plates (24), and the outer circumferential surface of the reinforcing ring is fixedly connected to the inner circumferential surface of the flow equalizing cylinder (25), and the inner circumferential surface of the reinforcing ring is fixedly connected to the circumferential surface of the steel shaft (1) or the outer circumferential surface of the copper sleeve (2), respectively, depending on the location.
5. The cathode roll for producing an electrolytic copper foil according to claim 1, wherein the diameter of the cathode roll is 3000mm and the length thereof is 2000mm; to ensure uniformity of roll surface current, the cathode roll is divided into 5 segments equally in the axial direction by 4 groups of conductive copper plates (13) located inside the cathode roll.
6. A method for manufacturing the cathode roll for electrolytic copper foil production according to claim 1, characterized by comprising the steps of:
step 1, preparing a titanium cylinder: adopting a cold spinning process to spin and form a seamless titanium cylinder; the content of H in the titanium cylinder component is less than or equal to 0.01 percent; the structure is equiaxial alpha structure, the grain size grade is 11-12, and the twin crystal content is below 10%;
step 2, copper sleeves at two ends of the hot-charging steel shaft: thermally mounting copper sleeves at two ends of the steel shaft; the assembly interference of the copper sleeves (2) at the two ends and the steel shaft is required to be 0.2mm;
step 3, welding a central steel plate: a central steel plate (10) is assembled at the central position inside the width of the cathode roll;
step 4, assembling and welding the flow equalizing cylinder: welding a corresponding reinforcing ring (23) inside the conductive copper plate (13) outside the flow equalizing cylinder (25); the inner circles of the flow equalizing cylinders at the two ends are welded with the boss of the central steel plate (10);
step 5, welding a current collecting copper plate: a current collecting copper plate (24) is welded at the axial center of the current equalizing cylinder (25) at the two ends, and the current collecting copper plate is welded with the copper sleeve (2);
step 6, assembling and welding each steel cylinder, a conductive copper plate and a supporting ring: the steel cylinders (9) are sequentially welded from the central position to the two end parts, the supporting rings (12) and the conductive copper plates (13) are welded, reinforcing ribs between the supporting rings and the steel cylinders are welded, and the 2 supporting rings (12) and the 1 conductive copper plates (13) are fixedly connected; wherein copper-copper and copper-steel welding adopts MIG welding, and steel welding adopts CO 2 Gas shielded welding;
step 7, welding end plates at two ends: welding the outer circle of the end plate (14) with the seam allowance of the steel cylinder end part of the steel cylinder (9), welding the inner circle with the copper sleeve (2), welding the outer circle of the flow equalizing cylinder (25) with the end plate, respectively welding the end plate with the flow equalizing cylinder (29) and the steel cylinder (9) through the triangular reinforcing ribs 11, and welding the end plate with the copper sleeve (2) through the large triangular reinforcing ribs; wherein copper-copper and copper-steel welding adopts MIG welding;
step 8, assembling and welding an axial horizontal rib inside the steel cylinder: 4 parts of the circumference of the steel cylinder are equally divided, and 4 horizontal ribs (21) which are evenly distributed in the circumference of the steel cylinder are respectively connected with the supporting ring (12), the central steel plate (10) and the end plate (14) by adopting CO2 gas shielded welding;
step 9, heat treatment of the steel cylinder: the steel cylinder (9) is provided with a plurality of welding seams, in order to reduce the later deformation of the cathode roller caused by welding stress, the outer circle of the steel cylinder is coated by adopting a heat treatment heating track, and the heat preservation is carried out for 1.5 hours at 620+/-10 ℃ for carrying out stress relief annealing treatment;
step 10, machining the outer surface of the steel cylinder: in order to ensure the uniformity of the thickness of the additional copper cylinder, a numerical control machine is adopted to add the roughness Ra of less than or equal to 1.6 mu m, the circle run-out and the straightness of less than or equal to 0.05mm to the outer surface of the steel cylinder (9), and the conductive copper plate (13) is ensured to be 10mm higher than the steel cylinder;
step 11, preparing a copper cylinder (8): winding a layer of copper strips on the surface of the machined steel cylinder (9); the thickness of the copper strip is 10mm, the width of the copper strip is 16mm, the copper strips at two ends are welded with two ends of a steel cylinder, and the copper strip is welded with a conductive copper plate (13) used;
step 12, mechanically processing the outer surface of the copper cylinder: adopting a numerical control machine to add the surface of the copper cylinder (8) to achieve the surface roughness Ra less than or equal to 1.6 mu m, the circle run-out and the straightness less than or equal to 0.05mm, and ensuring the thickness of the copper cylinder to be 8mm and the thickness deviation to be less than or equal to 0.15mm; and is combined with
Adopting a machine-added forming cutter to machine-add V-shaped grooves on the outer surface of the copper sleeve, ensuring that the angle alpha of the V-shaped grooves is 35-45 degrees, the depth is 2-2.5 mm, the interval between the two grooves is 4-5 mm, and the V-shaped grooves are spirally distributed on the copper cylinder;
step 13, primary static balance test: in order to ensure stable and uniform rotation of the cathode roller, a rolling static balance test method is adopted to perform a primary static balance test, and static balance moment is ensured to be less than or equal to 3Nm in a way of welding a balancing weight on an inner end plate;
step 14, machining the inner surface of the titanium cylinder: adopting a numerical control sequential machining machine to add the outer surface of the copper cylinder (8) and the inner surface of the titanium cylinder (7), so that the diameter of the inner circle of the titanium cylinder is 3.5mm smaller than the outer diameter of the copper cylinder, the roughness Ra of the inner surface is less than or equal to 1.6 mu m, the circle run-out and the straightness are less than or equal to 0.05mm;
step 15, silver plating: in order to increase conductivity, reduce contact resistance and reduce energy consumption, a brush plating process is adopted to plate silver on the outer circumferential surface of the machined copper cylinder (8) and the inner circumferential surface of the titanium cylinder (9); the thickness of the plating layer is 5-8 mu m, and the plating layer is uniform and firmly attached;
step 16, hot charging: preserving heat of the titanium cylinder with silver plated inner circle at 450 ℃ for 1.5 hours, and protecting argon in the heating process; after heat preservation is finished, inserting the excircle of the silver-plated copper cylinder (8) into the titanium cylinder (7), and realizing assembly by utilizing the principle of thermal expansion and cold contraction;
step 17, titanium welding: sequentially assembling a titanium plate (15) and a titanium sleeve (5) at one end, and completing welding of the titanium plate and the inner wall of a titanium cylinder (7) and the titanium plate and the titanium sleeve (5) by adopting TIG welding; assembling a titanium ring (18) and a titanium sheath (6), ensuring that the end face of the outer end of the titanium ring is 5mm lower than the end face of a titanium cylinder (7), and adopting TIG welding to finish welding the titanium ring (18) and the inner wall of the titanium cylinder (7) and the titanium sheath (6) and a titanium plate (15); then welding titanium plates, titanium sleeves, titanium cylinders, titanium rings and the like at the other ends, and performing surface coloring flaw detection on all titanium welding seams after the titanium welding is completed;
step 18, heat treatment of the titanium cylinder: the stress-removing heat treatment of the titanium cylinder is carried out, the heat treatment is adopted to heat the caterpillar band to cover the outer circle of the titanium cylinder, and the stress-removing annealing treatment is carried out at 520+/-10 ℃ for 1.5 hours so as to eliminate the residual stress on the surface of the titanium cylinder of the cathode roller and overcome the problems of collapse, stress corrosion and easy oxidation of the roller surface of the cathode roller in the use process;
step 19, machining an outer circle of the titanium cylinder and an outer circle of the copper sleeve: machining the outer circle of the cathode roller titanium cylinder (7) and the outer circle of the copper sleeve (2) by adopting a numerical control machine, so as to ensure that the diameter phi of the outer circle of the cathode roller is 3000mm, the width is 2000mm, the thickness of the titanium cylinder wall is 10 mm-10.5 mm, the right angle of the end part of the titanium cylinder is 5mm higher than the outer end of the titanium ring, the roughness Ra1.6 of the roller surface, the straightness and the circle runout are less than or equal to 0.05mm;
step 20, static balance test: in order to ensure that the final static balance moment of the cathode roller is less than or equal to 3Nm, static balance weight is carried out on the weight ports of the titanium plates at the two ends of the cathode roller, the length of a weight rod (20) is adjusted according to the weight amount, so that the final static balance moment of the cathode roller is less than or equal to 3Nm, the weight ports are blocked by a titanium cover (19) after the weight is finished, the titanium cover is welded with the titanium plate (15), and the welding seam is subjected to surface dye inspection;
step 21, air tightness test: installing a barometer at one end of the cathode roller steel shaft airtight hole, introducing compressed nitrogen into one end of the cathode roller steel shaft airtight hole, maintaining the pressure for 2 hours under 0.04MPa, and checking the overall sealing performance of the cathode roller;
step 22, polishing and grinding the outer circumferential surface of the titanium cylinder: on a cathode roller polishing and grinding machine, sequentially polishing and grinding roller surfaces by adopting PVA grinding wheels of No. 40, no. 80, no. 120, no. 220, no. 320 and No. 600, so that the roller surface roughness Ra is less than or equal to 0.2 mu m, the circle run-out and the straightness are less than or equal to 0.05mm, and the surfaces have no chromatic aberration, mottle and pinhole defects;
step 23, fitting installation: the two ends of the cathode roller are sequentially provided with insulating rings (16), titanium screws (17), bearings (4) and conducting rings (3);
thus, the manufacturing of the cathode roller is completed.
7. The method for manufacturing a cathode roll for electrolytic copper foil production according to claim 6, wherein, when polishing the outer circumferential surface of the titanium cylinder:
when the 40#PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 400-450 r/min, the longitudinal feeding of the grinding wheel is 30-40 mm/min, the pressure is 0.25-0.3 MPa, the rotating speed of the cathode roller is 4.0-4.5 r/min, and the using amount of the grinding wheel is 2;
when the 80#PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 450-500 r/min, the longitudinal feeding of the grinding wheel is 25-30 mm/min, the pressure is 0.2-0.25 MPa, the rotating speed of the cathode roller is 4.5-5 r/min, and the using amount of the grinding wheel is 1.5; when the 120# PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 450-500 r/min, the longitudinal feeding of the grinding wheel is 25-30 mm/min, the pressure is 0.2-0.25 MPa, the rotating speed of the cathode roller is 4.5-5 r/min, and the using amount of the grinding wheel is 1.5; when the 220# PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 500-550 r/min, the longitudinal feeding of the grinding wheel is 20-25 mm/min, the pressure is 0.15-0.2 MPa, the rotating speed of the cathode roller is 5.5-6 r/min, and the using amount of the grinding wheel is 1;
when the 320#PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 500-550 r/min, the longitudinal feeding of the grinding wheel is 20-25 mm/min, the pressure is 0.15-0.2 MPa, the rotating speed of the cathode roller is 5.5-6 r/min, and the using amount of the grinding wheel is 0.5;
when the 600#PVA grinding wheel is adopted, the rotating speed of the grinding wheel is 550-600 r/min, the longitudinal feeding of the grinding wheel is 15-20 mm/min, the pressure is 0.1-0.15 MPa, the rotating speed of the cathode roller is 6-6.5 r/min, and the using amount of the grinding wheel is 0.5.
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| CN202211605877.4A CN116240592B (en) | 2022-12-12 | 2022-12-12 | Cathode roller for electrolytic copper foil production and manufacturing method thereof |
| PCT/CN2023/118243 WO2024125001A1 (en) | 2022-12-12 | 2023-09-12 | Cathode roller for electrolytic copper foil production, and manufacturing method for cathode roller |
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