CN-121976264-A - Conductive cathode roller and assembly method

CN121976264ACN 121976264 ACN121976264 ACN 121976264ACN-121976264-A

Abstract

The application provides a conductive cathode roller and an assembly method, wherein a plurality of U-shaped copper bars are uniformly arranged on a steel core along the circumferential direction through elastic connecting pieces, the elastic connecting pieces have a certain self-adaptive stroke, the shrinkage stroke of a titanium cylinder can be compensated, the micro plastic deformation phenomenon of the titanium cylinder caused by uncontrollable assembly binding force can be eliminated in a self-adaptive manner, and the mechanical property and the surface quality of the cathode roller are ensured. Secondly, the steel core adopts the framework structure to the U type copper bar of even setting above that, the framework structure of steel core compares in current monolithic structure, and the dead weight of reduction cathode roll that can be very big, and the cooperation of U type copper bar and framework structure can improve structural strength, simultaneously, adopts the electrically conductive mode of winding copper wire in the prior art, and U type copper bar can make the electric current more even stable. By designing a lightweight steel core structure, the weight is reduced by 36%, the driving power can be reduced, and the energy consumption is saved.

Inventors

GAO SHIKAI
Zi Wanchun
LI XUELEI
PEI QIANG
Tian Langyuan
ZHOU JIAXUAN
Chang Pengjie
LIU GANGHONG
LIU FENGGANG
Lu Leichang

Assignees

西安航天新能源装备科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260106

Claims (10)

1. The conductive cathode roller is characterized by comprising a steel core (201) with a cylindrical frame body structure, wherein a steel shaft (305) is arranged at the axle center of the steel core (201), a plurality of U-shaped copper bars (202) are uniformly arranged on the steel core (201) along the circumferential direction through elastic connecting pieces, and two ends of each U-shaped copper bar (202) are respectively electrically connected with copper sleeves (205) arranged at two ends of the steel shaft (305) through copper end plates (204); The side interference sleeve of the steel core (201) is provided with a titanium cylinder (101), the end face of the steel core (201) is provided with a titanium end plate (104) and a titanium protective sleeve (107) at intervals, the outer edge of the titanium end plate (104) is welded with the inner wall of the titanium cylinder (101), the inner edge of the titanium end plate is welded with a steel sleeve (108) sleeved on a copper sleeve (205), the titanium end plate (104) is provided with a counterweight titanium screw (105) and a fastening titanium screw (106) which are in threaded connection with a U-shaped copper bar (202), and a titanium ring (103) is welded at the junction of the titanium end plate (104), the titanium protective sleeve (107) and the titanium cylinder (101); The outer wall of the titanium protective sleeve (107) is sequentially and coaxially provided with an insulating gasket (6) and an insulating ring assembly (7), and two ends of the steel shaft (305) are provided with driving assemblies.
2. The conductive cathode roller according to claim 1, wherein the steel core (201) comprises a steel barrel (301) with a cylindrical frame structure and steel end plates (302) with a meter-shaped structure arranged at two ends of the steel barrel (301), and at least one special-shaped support plate (304) with a meter-shaped structure is arranged between the steel end plates (302) through a support tube (303); The steel drum (301), the steel end plate (302) and the special-shaped supporting plate (304) are coaxially and penetratingly provided with the steel shaft (305).
3. The conductive cathode roller according to claim 2, wherein the outer wall of the steel drum (301) is provided with a second groove (306), the inner wall is provided with a second groove (307), the lines of the second groove (306) and the second groove (307) are co-located, the width of the second groove (306) is adapted to the width of the U-shaped copper bar (202), and the width of the second groove (307) is adapted to the width of the end of the special-shaped support plate (304).
4. The conductive cathode roller according to claim 2, wherein the steel drum (301) comprises two annular steel rings and a plurality of connecting ribs uniformly arranged between the two annular steel rings; the steel end plate (302) and the special-shaped support plate (304) comprise a plurality of support plates extending along the radial direction, and the support plates of the steel end plate (302) and the special-shaped support plate (304) are respectively connected with the connecting ribs of the steel drum (301) in a one-to-one correspondence manner.
5. The conductive cathode roll according to claim 1, wherein the U-shaped copper bar (202) comprises a top section and side sections located on both sides of the top section; The elastic connecting piece comprises screw rods (300) which are uniformly arranged on the top section at intervals, one end of each screw rod (300) is fixedly connected to the side wall of the top section, which is close to the steel core (201), the other end of each screw rod penetrates through the steel core (201) and is in threaded connection with the nut (207), a compression spring (206) is sleeved on a rod body of each screw rod (300) between the top section and the steel core (201), and a compression spring pad (208) and a compression flat pad (209) are sleeved on the rod body of each screw rod (300) between the nut (207) and the steel core (201); the side sections of the U-shaped copper bars (202) are connected with the steel core (201) through connecting screws (203).
6. The conductive cathode roller according to claim 5, wherein a plurality of through holes for connecting and fastening titanium screws (106) and counterweight titanium screws (105) are formed in the side section of the U-shaped copper bar (202), and the end of the side section of the U-shaped copper bar (202) is an arc surface; the copper end plate (204) is of an annular plate structure, and an arc-shaped surface at the end part of the side section of the U-shaped copper bar (202) is matched with the side structure of the copper end plate (204).
7. The conductive cathode roll according to claim 1, wherein the large end of the fastening titanium screw (106) is welded to the titanium end plate (104), and a small plug (109) is welded to the welded portion; the large end part of the counterweight titanium screw (105) is welded with the titanium end plate (104), and a large blanking cover (110) is welded at the welding part.
8. The conductive cathode roller according to claim 1, wherein the driving assembly comprises a driving flange (10), a flat key (8) is arranged on the inner wall of the driving flange (10), the flat key (8) is embedded with the steel shaft (305) along the radial direction, a limit cover (14) is arranged at the end part of the driving flange (10), the limit cover (14) is connected to the end surface of the steel shaft (305) through a limit screw (11), and a limit spring pad (12) and a limit flat pad (13) are arranged between the limit cover (14) and the end surface of the steel shaft (305).
9. The conductive cathode roll according to claim 1, characterized in that the steel shaft (305) is further sleeved with a bearing (2) and a conductive ring (3).
10. A method of assembling an electrically conductive cathode roll, characterized in that it is based on an electrically conductive cathode roll according to any one of claims 1-9, comprising the steps of: Step S1, fixing copper sleeves (205) at two end parts of a steel shaft (305) through hot filling, attaching copper end plates (204) to the end surface of a steel core (201), uniformly mounting U-shaped copper bars (202) on the steel core (201) through elastic connectors according to preset pretightening force, and sequentially welding the U-shaped copper bars (202), the copper end plates (204) and the copper sleeves (205); Step S2, fixing a titanium cylinder (101) outside a copper sleeve (205) through hot filling, welding a titanium end plate (104) attached with a U-shaped copper bar (202) at the outer edge of the titanium cylinder (101), welding a steel sleeve (108) at the inner edge, fixing the titanium end plate (104) through fastening a titanium screw (106), rotating a counterweight through a counterweight titanium screw (105), and sequentially welding a titanium ring (103), the titanium end plate (104) and a titanium protective sleeve (107); And S3, coaxially arranging an insulating washer (6) and an insulating ring assembly (7) on the outer wall of the titanium protective sleeve (107) in sequence, and respectively connecting driving assemblies at two ends of the steel shaft (305).

Description

Conductive cathode roller and assembly method Technical Field The invention belongs to the technical field of electrolytic copper foil production equipment, and particularly relates to a conductive cathode roller and an assembly method. Background The cathode roller is a core device in the production of electrolytic copper foil, is a cathode carrier in the production of electrolytic copper foil, and reduces copper ions into copper foil through an electrolytic deposition process. The surface quality, conductivity and mechanical property of the copper foil directly influence the thickness, uniformity and surface smoothness of the copper foil, and the produced copper foil is widely applied to the fields of lithium batteries, power batteries, PCBs and CCLs. The weight of the existing phi 2700 multiplied by 1450mm cathode roller is 11.0 tons, which causes inconvenience to the transportation, lifting operation and use requirements of the cathode roller, the technical development of the cathode roller closely follows the requirements of new energy and electronic industry, the performance improvement of the cathode roller directly promotes the development of downstream products, and the lightweight and high-conductivity cathode roller becomes the focus of the technical development of the next-generation cathode roller. The application patent with the patent number of CN202411472760.2 discloses a high-conductivity large-size cathode roller for electrolytic copper foil, which is characterized in that grooves are uniformly formed in the inner wall of a titanium ring along the circumferential direction, and a conductive copper core is embedded in the grooves of the titanium ring. The structure improves the surface electric conduction uniformity of the cathode roller to a certain extent, but the whole weight of the cathode roller is not lightened, because the cathode roller is a large thin-wall component, the dead weight of the cathode roller can generate continuous downward bending stress, and meanwhile, after the cathode roller titanium cylinder and the roller core are hot-packed, the compressive stress generated by the dead weight and the compressive stress generated by interference fit are overlapped at the lower half part of the titanium cylinder, so that the synthetic stress of the region exceeds the yield limit of the titanium material, and the micro plastic deformation occurs. Plastic deformation is irreversible, which changes the microstructure of the titanium material, possibly resulting in its decrease in fatigue strength, corrosion resistance and overall shape stability. Under the action of dead weight and stress relaxation for a long time, the titanium cylinder may generate unrecoverable micro ovality or bending deformation, and the thickness uniformity and the surface quality of the deposited copper foil are affected. Secondly, since the surface of the cathode roll is locally plastically deformed to cause inconsistent distance from the anode, the current density in the region with small gap is large according to ohm's law, and the initial uniform electric field is destroyed, and thus the present application contemplates a lightweight high-conductivity cathode roll. Disclosure of Invention The invention provides a conductive cathode roller and an assembly method thereof, aiming at solving the technical problems that the cathode roller in the prior art is overlarge in weight, and the titanium cylinder cannot be self-adaptively eliminated after interference assembly, and the current density distribution of the surface of the cathode roller is uneven. In order to achieve the above purpose, the present invention provides the following technical solutions: In a first aspect, an embodiment of the disclosure provides a conductive cathode roller, including a steel core with a cylindrical frame structure, where an axle center of the steel core is provided with a steel shaft, the steel core is uniformly provided with a plurality of U-shaped copper bars along a circumferential direction through elastic connectors, and two ends of the U-shaped copper bars are respectively provided with copper sleeves at two ends of the steel shaft through copper end plate electrical connection sleeves; The side surface of the steel core is provided with a titanium cylinder in an interference sleeve manner, the end surface of the steel core is provided with a titanium end plate and a titanium protective sleeve at intervals, the outer edge of the titanium end plate is welded with the inner wall of the titanium cylinder, the inner edge of the titanium end plate is welded with a steel sleeve sleeved on a copper sleeve, the titanium end plate is provided with a counterweight titanium screw and a fastening titanium screw which are in threaded connection with a U-shaped copper bar, and a titanium ring is welded at the junction of the titanium end plate, the titanium protective sleeve and the titanium cylinder; The outer wall of the titanium p