CN115627516A

CN115627516A - Integral titanium-coated copper backboard titanium basket assembly for high-speed continuous electroplating

Info

Publication number: CN115627516A
Application number: CN202211325966.3A
Authority: CN
Inventors: 周华; 李建忠
Original assignee: Nine Days New Energy Materials Co Ltds In Jiangsu East
Current assignee: Nine Days New Energy Materials Co Ltds In Jiangsu East
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-01-20

Abstract

The invention discloses an integral titanium-coated copper backboard titanium basket assembly for high-speed continuous electroplating, which comprises an electroplating bath, wherein the inner wall of the electroplating bath is correspondingly and rotatably connected with a pulling roller through a bearing, the inner wall of the electroplating bath is correspondingly and rotatably connected with a guide roller, steel belts are wound on the outer walls of the pulling roller and the guide roller, the pulling roller is connected with external torque, a titanium basket framework is uniformly arranged on the inner wall of the electroplating bath, the titanium basket framework is of a cuboid structure, an anode bridge and a positioning structure are fixed at the bottom of the titanium basket framework through nuts, the titanium basket framework is composed of a titanium basket framework, a titanium net, titanium pipes and a titanium-coated copper composite backboard, the titanium basket framework is a frame around a titanium basket and four cross beams in the middle of the front of the titanium basket, the front and the back of the titanium basket framework are communicated through thirteen titanium pipes, five layers of the circumferential wall of each titanium pipe are uniformly distributed, and twelve through holes are formed in each layer.

Description

Integral titanium-coated copper backboard titanium basket assembly for high-speed continuous electroplating

Technical Field

The invention belongs to the technical field of electroplating, and particularly relates to an integral titanium-coated copper backboard titanium basket assembly for high-speed continuous electroplating.

Background

High-speed plate electroplating is one of the electroplating industries, and gradually occupies an important position due to high linear speed, high productivity and low cost, and particularly, high-speed electroplating equipment is greatly developed and is greatly introduced by advanced equipment in Japan, america and Germany.

The rapid development of the cylindrical lithium battery industry continuously increases the demand of the nickel preplating battery steel strip, and further promotes the development of the nickel preplating steel strip industry. In particular, the requirement of the field of power automobiles on the nickel preplated steel strip is very high, and the uniformity and the compactness of a nickel layer are very high.

As high-speed electroplating, the necessary condition is to use large current density to carry out electroplating operation, however, the traditional equipment and process cannot meet the requirements of large current electroplating, anode material passivation and titanium basket oxidation are caused, and production is stopped. In the titanium basket developed subsequently, the conductivity in the titanium basket and the electrochemical dissolution of a nickel material are increased by using the conductive rod. However, due to the concentration effect of the current on the current conducting rod, the electric field in the titanium basket is not uniform, and the uniformity of the electroplated nickel layer is further influenced.

In the prior art, the invention also increases the conductivity of the titanium basket by electroplating platinum layers on the surfaces of the titanium basket framework and the titanium mesh. The platinum coating is generally 100 to 120 grams per square meter. The scheme can effectively solve the conductivity and the electric field uniformity of the titanium basket, so that the titanium basket can meet the working requirement of high current density, an even electric field is provided, and finally an electroplated nickel layer with even thickness is obtained. Moreover, the platinum plating layer has better corrosion resistance, and can effectively ensure the corrosion resistance of the titanium basket. However, the scheme mainly has the following defects:

(1) The cost is high: the square meter of the platinum plating layer is 100-120 g, and the cost is about 5-6 times of that of the titanium-coated copper-clad plate with the same area and the thickness of 8 mm;

(2) The process is complex: electroplating platinum on the surfaces of the titanium framework and the titanium mesh, wherein the thickness of the platinum is about 5 mu m, and the uniformity of the thickness of the platinum layer influences the uniformity of an electric field generated when the titanium basket works;

(3) The maintenance is complicated: the platinum plating layer is a non-permanent plating layer, and needs to be plated again after about 2 years of use. Not only is the cost high, but also the maintenance process is more complicated.

Therefore, how to develop a titanium basket which is low in cost and suitable for a high-speed steel strip continuous nickel plating machine set becomes a problem to be solved by the technical personnel in the field.

Disclosure of Invention

The invention aims to solve the problems in the prior art by aiming at the existing material collecting device, namely the titanium basket assembly with the integral titanium-coated copper backboard for high-speed continuous electroplating.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a high-speed continuous electroplating is with whole titanium cladding copper backplate titanium basket subassembly, includes the plating bath, the inner wall correspondence of plating bath is rotated through the bearing and is connected with the pulling roll, the inner wall correspondence of plating bath is rotated and is connected with the guide roll, the outer wall winding of pulling roll and guide roll has the steel band, the pulling roll is connected with outside torque, the inner wall of plating bath evenly is provided with titanium basket skeleton.

The invention further discloses that in the electroplating bath, the inner wall of the electroplating bath is correspondingly and rotatably connected with a pulling roller through a bearing, the inner wall of the electroplating bath is correspondingly and rotatably connected with a guide roller, steel belts are wound on the outer walls of the pulling roller and the guide roller, the pulling roller is connected with an external torque, and titanium basket frameworks are uniformly arranged on the inner wall of the electroplating bath.

The invention further discloses that the titanium basket framework is of a cuboid structure, an anode bridge and a positioning structure are fixed at the bottom of the titanium basket framework through nuts, the titanium basket framework is composed of the titanium basket framework, a titanium net, a titanium pipe and a titanium-coated copper composite back plate, and the titanium basket framework is a frame around the titanium basket and four cross beams in the middle of the front face of the titanium basket.

The invention further discloses that the front surface and the back surface of the titanium basket framework are communicated by thirteen titanium tubes, the circumferential wall of each titanium tube is uniformly distributed with five layers, and each layer is provided with twelve through holes.

The invention further discloses that the back of the titanium basket framework is integrally formed by a titanium-coated copper composite back plate with the thickness of eight millimeters, wherein the copper substrate is six millimeters thick, two sides of the copper substrate are respectively coated with a titanium layer with the thickness of one millimeter, two sides of the top of the titanium-coated copper composite back plate are respectively connected with an anode bridge and an insulator, and one side of the insulator is fixedly provided with an upper positioning cross beam through a bolt.

The invention further discloses that a lower positioning block is arranged at the bottom of the titanium basket framework, a concave clamping groove is formed in the inner wall of the electroplating bath, and the lower positioning block and the concave clamping groove are mutually positioned.

The invention further discloses that one side of the electroplating bath is connected with a water pump in a penetrating way, and a port of the water pump is connected with a liquid storage tank in a penetrating way.

The invention further discloses that the outer wall of the guide roller is uniformly connected with a support rod through a hinge, one end of the support rod is connected with a first attachment scraping plate through a hinge, one side of the first attachment scraping plate is connected with a second attachment scraping plate through a sliding way, one sides of the first attachment scraping plate and the second attachment scraping plate are in contact with a steel belt, two ends of the guide roller are fixedly provided with hollowed frames through welding, the inner wall of each hollowed frame is in sliding connection with the first attachment scraping plate and the second attachment scraping plate, and a spring is connected between the first attachment scraping plate and the second attachment scraping plate.

The invention further discloses that a sliding groove is formed in one side of the titanium basket framework, a cleaning brush is slidably mounted in the sliding groove, a winding disc is correspondingly mounted at the top of the titanium basket framework, a steel wire is wound on the winding disc, one end of the steel wire is connected with the cleaning brush, and a winding motor is mounted on one side of the winding disc.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, the titanium basket contains soluble anode materials such as nickel blocks, cakes and balls used for electroplating, the titanium-coated copper composite plate is used as the titanium basket integral back plate, the conductivity of the titanium basket is enhanced, the integral titanium-coated copper back plate is used, so that a uniform and stable electric field can be provided for the titanium basket in the electroplating process, and the whole titanium basket (anode) and a steel strip (cathode) are positioned vertically to ensure parallelism, so that the speed of nickel deposition on the steel strip is uniform, the thickness of a nickel layer is more uniform, and the thickness difference of a plating layer can be controlled within 5%, thereby achieving the foreign advanced level; the titanium basket assembly with the titanium-coated copper integral backboard for high-speed electroplating has the advantages that the whole titanium basket connecting part is tightly connected, the electric conductivity is good, the maximum current can reach 8000A, the equipment can operate under high current density, the current density can be increased to more than 20A/dm & lt 2 & gt, the unit speed of a continuous battery steel strip nickel plating wire is increased, and the speed can reach 60 m/min. The titanium-coated copper integral backboard titanium basket assembly for high-speed electroplating has the advantages of low processing cost, simple manufacturing process and easy maintenance, is suitable for large-scale mass production, solves the problem of surface uniformity of a nickel-plated layer of a battery steel strip, and simultaneously realizes high-speed operation of a unit under high current density.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the titanium basket skeleton of the present invention in front view;

FIG. 3 is a side view of the titanium basket skeleton of the present invention;

FIG. 4 is a schematic view of the anode bridge and upper positioning beam assembly of the present invention;

FIG. 5 is a schematic view of a pierced titanium tube of the present invention;

FIG. 6 is a schematic illustration of an attachment drawdown of the present invention;

FIG. 7 is a schematic view of a current density extraction line of the present invention;

FIG. 8 is a schematic of the current density of the present invention;

FIG. 9 is a schematic view of a cleaning brush mounting structure of the present invention;

in the figure: 1. an anode bridge and a positioning frame; 2. a titanium basket skeleton; 3. a titanium mesh; 4. a titanium tube; 5. a titanium-clad copper composite back plate; 6. a lower positioning block; 91. an anode bridge; 92. an insulator; 93. an upper positioning beam; 81. a pulling roll; 82. a steel belt; 83. a guide roller; 71. a water pump; 72. a liquid storage tank; 73. an electroplating bath; 831. a strut; 832. hollowing out the frame; 833. carrying out knife coating on the first attachment; 834. a spring; 835. scraping an attachment plate II; 104. a cleaning brush; 103. a steel wire; 101. a winding motor; 102. and (4) winding the disc.

Detailed Description

The following detailed description of the present invention, taken in conjunction with the preferred embodiments and the accompanying drawings, further illustrates the present invention without limitation. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a high-speed continuous electroplating is with whole titanium cladding copper backplate titanium basket subassembly, including plating bath 73, the inner wall of plating bath 73 corresponds to and rotates through the bearing and is connected with the pulling roll 81, the inner wall of plating bath 73 corresponds to and rotates and is connected with the guide roll 83, the outer wall of pulling roll 81 and guide roll 83 is twined there is the steel band 82, the pulling roll 81 is connected with external torque, the inner wall of plating bath 73 evenly is provided with titanium basket skeleton 2;

the titanium basket framework 2 is of a cuboid structure, an anode bridge and a positioning structure 1 are fixed at the bottom of the titanium basket framework 2 through nuts, the titanium basket framework 2 is composed of the titanium basket framework 2, a titanium net 3, a titanium pipe 4 and a titanium-coated copper composite back plate 5, the titanium basket framework 2 is a frame around the titanium basket and four cross beams in the middle of the front face of the titanium basket, and the cross beams are mainly used for reinforcing the titanium basket;

the front side and the back side of the titanium basket framework 2 are communicated by thirteen titanium tubes 4, five layers of twelve through holes are uniformly distributed on the circumferential wall of each titanium tube 4, the nickel anode rapidly generates electrochemical dissolution under the action of large current density during the electroplating work of the titanium basket to generate a large amount of nickel ions, the nickel ions are one of main nickel sources of a final nickel layer, and the main purpose of the through holes is to increase the circulation channels of plating solution inside and outside the titanium basket, so that the nickel ions generated by the titanium basket in the working process can rapidly flow outside the titanium basket along with the plating solution in a circulation manner to maintain the balance of the nickel ions in the plating solution;

the back of the titanium basket framework 2 is integrally formed by a titanium-coated copper composite back plate 5 with the thickness of eight millimeters, wherein the thickness of a copper substrate is six millimeters, two sides of the titanium layer are respectively coated with one millimeter of thickness, two sides of the top of the titanium-coated copper composite back plate 5 are respectively connected with an anode bridge 91 and an insulator 92, one side of the insulator 92 is provided with an upper positioning cross beam 93 through bolt fixed mounting, the titanium-coated copper plate can realize the integral good conductive performance and corrosion resistance of the titanium basket, in the electroplating process, an even and stable electric field is provided, and finally a nickel layer with the uniform thickness is obtained. Through finite element analysis, three current density extraction lines (shown as 7) are drawn in the length direction near the cathode plate, the current density is extracted, and the extraction result is shown as figure 8. The current density values of the three lines are relatively close, and the average values are all 3.52E07A/m ^2, which shows that the scheme has relatively uniform current distribution formed near the cathode plate under the excitation of 2V voltage. This solution is shown to provide an overall uniform current which will help to improve the uniformity of the nickel layer thickness.

Lower locating piece 6 is installed to the bottom of titanium basket skeleton 2, and concave type draw-in groove has been seted up to the inner wall of plating bath 73, and lower locating piece 6 and concave type draw-in groove are fixed a position each other, realize the firm of titanium basket for the rigidity between titanium basket (positive pole) and steel band (negative pole) is unchangeable, finally helps the even nickel layer of steel band surface electroplating deposition thickness.

One side of the electroplating bath 73 is connected with a water pump 71 in a penetrating way, a port of the water pump 71 is connected with a liquid storage tank 72 in a penetrating way, in the continuous electroplating process, along with the continuous movement of the cathode, nickel ions in the plating solution around the cathode are reduced into nickel to be deposited on the surface of the cathode, the concentration of the nickel ions is in a descending trend in unit time, and the nickel ions in other areas in the plating solution are supplemented to the periphery of the cathode through the circulation of the plating solution, so that the nickel ion balance is realized. According to the electroplating formula

d＝(C*DK*t*ηK)/r

Wherein C is the electrochemical equivalent, dk is the current density, t is the plating time, η K is the current efficiency, and r is the plating layer metal density. Wherein, after the size of the titanium basket or anode is fixed, the plating time is mainly determined by the moving speed of the steel strip 82 (cathode). Therefore, as the speed is faster, a greater current density Dk is required to ensure the target nickel layer thickness. The high current density can reduce more nickel ions to nickel deposited on the surface of the coating in unit time. High speed continuous plating often requires large bath circulation to ensure the balance of nickel ions around the cathode.

The main sources of nickel ions in the plating solution are nickel salts (NiSO4.6H2O and NiCl2.6H2O) in the nickel solution and the electrochemical dissolution of a nickel simple substance in the anode. The latter being, among others, the more dominant source of nickel ions.

The outer wall of the guide roller 83 is uniformly connected with a supporting rod 831 through a hinge, the guide roller 83 is connected with external torque, one end of the supporting rod 831 is connected with a first attachment knife-coating plate 833 through a hinge, one side of the first attachment knife-coating plate 833 is connected with a second attachment knife-coating plate 835 through sliding, one sides of the first attachment knife-coating plate 833 and the second attachment knife-coating plate 835 are in contact with the steel belt 82, the two ends of the guide roller 83 are fixedly welded with a hollowed-out frame 832, the inner wall of the hollowed-out frame 832 is in sliding connection with the first attachment knife-coating plate 833 and the second attachment knife-coating plate 835, and as the surface of the steel belt 82 is often provided with attachments generated by electroplating, the attachments can block normal pulling of the steel belt 82 too much, the guide roller 83 is driven to rotate through the torque, so that the first attachment knife-coating plate 833 and the second attachment knife-coating plate 835 are unfolded to a state with larger diameter due to inertial swinging, and the attachments on the surfaces of the steel belt 82 can be cleaned through the surfaces of the two plates, thereby maintaining smoothness of the steel belt 82 and facilitating pulling;

a spring 834 is connected between the first attachment blade coating plate 833 and the second attachment blade coating plate 835, the spring 834 is used for realizing the rebound of the distance between the first attachment blade coating plate 833 and the second attachment blade coating plate 835, the distance between the first attachment blade coating plate 833 and the second attachment blade coating plate 835 is larger when the rotating speed of the guide roller 83 is high, and the distance is restored by the spring 834 when the rotating speed is slow;

the titanium basket contains soluble anode materials such as nickel blocks, cakes, balls and the like used for electroplating, meanwhile, the titanium-coated copper composite plate is used as the titanium basket integral back plate, the conductivity of the titanium basket is enhanced, meanwhile, the integral titanium-coated copper back plate is used, so that the titanium basket can provide a uniform and stable electric field in the electroplating working process, and meanwhile, the whole titanium basket (anode) and a steel belt (cathode) are positioned from top to bottom to ensure parallelism, so that the speed of depositing nickel on the steel belt is uniform, the thickness of a nickel layer is more uniform, the thickness difference of a plating layer can be controlled within 5 percent, and the foreign advanced level is reached;

the titanium basket assembly of the titanium-coated copper integral backboard for high-speed electroplating has the advantages that the whole titanium basket connecting part is tightly connected, the conductivity is good, the maximum current can reach 8000A, the equipment can operate under high current density, the current density can be increased to more than 20A/dm & lt 2 & gt, the unit speed of a continuous battery steel strip nickel plating wire is increased, and the speed can reach 60 m/min.

As shown in fig. 9, a sliding groove is formed in one side of the titanium basket frame 2, the cleaning brush 104 is slidably mounted in the sliding groove, a winding disc 102 is correspondingly mounted at the top of the titanium basket frame 2, a steel wire 103 is wound on the winding disc 102, one end of the steel wire 103 is connected with the cleaning brush 104, a winding motor 101 is mounted on one side of the winding disc 102, the winding disc 102 is driven to rotate by starting the winding motor 101, the steel wire 103 can be smoothly tightened or loosened, the cleaning brush 104 is driven to move upwards, and when the winding disc is loosened, the cleaning brush 104 moves downwards due to self gravity to clean a net on the titanium basket frame 2.

The titanium-coated copper integral backboard titanium basket assembly for high-speed electroplating has the advantages of low processing cost, simple manufacturing process and easy maintenance, is suitable for large-scale mass production, solves the problem of surface uniformity of a nickel-plated layer of a battery steel strip, and simultaneously realizes high-speed operation of a unit under high current density.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions may be made in some technical features thereof, without departing from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a high-speed continuous electroplating is with whole titanium package copper backplate titanium basket subassembly, includes plating bath (73), its characterized in that: the inner wall of the electroplating bath (73) is correspondingly and rotatably connected with a traction roller (81) through a bearing, the inner wall of the electroplating bath (73) is correspondingly and rotatably connected with a guide roller (83), steel belts (82) are wound on the outer walls of the traction roller (81) and the guide roller (83), the traction roller (81) is connected with an external torque, and a titanium basket framework (2) is uniformly arranged on the inner wall of the electroplating bath (73).

2. The titanium basket assembly of claim 1, wherein the titanium basket assembly comprises: titanium basket skeleton (2) are the cuboid structure, and are fixed with positive pole bridge and location structure (1) through the nut in the bottom, titanium basket skeleton (2) comprise titanium basket skeleton (2), titanium net (3), titanium pipe (4) and titanium cladding copper composite back plate (5), titanium basket skeleton (2) are four crossbeams in the middle of titanium basket frame all around and the titanium basket is positive.

3. The titanium basket assembly of integral titanium-clad copper-back plate for high-speed continuous electroplating according to claim 2, wherein: the front surface and the back surface of the titanium basket framework (2) are communicated by thirteen titanium pipes (4), five layers of through holes are uniformly distributed on the circumferential wall of each titanium pipe (4), and each layer of through holes is twelve.

4. The titanium basket assembly of claim 3, wherein the titanium basket assembly comprises: the back of the titanium basket framework (2) is integrally formed by a titanium-coated copper composite back plate (5) with the thickness of eight millimeters, wherein the copper substrate is six millimeters thick, two sides of the copper substrate are respectively coated with a titanium layer with the thickness of one millimeter, two sides of the top of the titanium-coated copper composite back plate (5) are respectively connected with an anode bridge (91) and an insulator (92), and one side of the insulator (92) is fixedly provided with an upper positioning cross beam (93) through a bolt.

5. The titanium basket assembly of claim 4, wherein the titanium basket assembly comprises at least one of the following components: the bottom of the titanium basket framework (2) is provided with a lower positioning block (6), the inner wall of the electroplating bath (73) is provided with a concave clamping groove, and the lower positioning block (6) and the concave clamping groove are mutually positioned.

6. The titanium basket assembly of claim 5, wherein the titanium basket assembly comprises at least one of the following components: one side of the electroplating tank (73) is connected with a water pump (71) in a penetrating way, and the port of the water pump (71) is connected with a liquid storage tank (72) in a penetrating way.

7. The titanium basket assembly of claim 6, wherein the titanium basket assembly comprises: the outer wall of guide roll (83) evenly has branch (831) through hinged joint, the one end of branch (831) has attachment knife board (833) through hinged joint, one side of attachment knife board (833) is connected with attachment knife board two (835) through sliding, one side and steel band (82) of attachment knife board (833) and attachment knife board two (835) contact, there are fretwork frame (832) at the both ends of guide roll (83) through welded fastening, the inner wall and the attachment knife board (833) and attachment knife board two (835) mutual sliding connection of fretwork frame (832).

8. The titanium basket assembly of claim 7, wherein the titanium basket assembly comprises: and a spring (834) is connected between the first attached matter blade-coating plate (833) and the second attached matter blade-coating plate (835).

9. The titanium basket assembly of claim 8, wherein the titanium basket assembly comprises: the titanium basket structure is characterized in that a sliding groove is formed in one side of the titanium basket framework (2), a cleaning brush (104) is arranged in the sliding groove, a winding disc (102) is correspondingly arranged at the top of the titanium basket framework (2), a steel wire (103) is wound on the winding disc (102), one end of the steel wire (103) is connected with the cleaning brush (104), and a winding motor (101) is arranged on one side of the winding disc (102).