An ultra-wide cathode roller structure with high electrical conductivity

Abstract

The present invention discloses a structure of an ultra-wide cathode roller with high conductivity, which includes a steel shaft, a steel cylinder, a titanium cylinder, a sealing end plate, a long copper cylinder and a copper ring; a large copper support flat plate is arranged inside the sealing end plate, and a first long reinforcing rib is arranged between them. The first short copper cylinder is electrically connected to the long copper cylinder. Second short copper cylinders are evenly distributed on the inner steel shaft and are electrically connected to the first short copper cylinder. Copper support rib plates are arranged on the second short copper cylinders and are connected to the steel cylinder through conductive reinforcing arc plates. Second long reinforcing ribs are arranged on the copper support rib plates. Copper wires are evenly distributed on the steel cylinder, and then the titanium cylinder is assembled by interference fit; the large copper support flat plate provides a stable current for the cathode roller surface and enhances the rigidity of the cathode roller. When there is a connection hidden danger between it and the long copper cylinder, the copper support rib plate combined with the second short copper cylinder and the conductive reinforcing arc plate can provide a compensating current, and can provide sufficient support again to ensure the current stability and rigidity of the cathode roller.

Description

Technical Field

[0001] The present invention relates to the field of electrolytic copper foil manufacturing, and particularly to a structure of an extra-wide cathode roll with high electrical conductivity. Background Art

[0002] The cathode roll is a key device for producing copper foil. Its structure mainly includes a steel shaft with a steel cylinder in the middle, a titanium cylinder sleeved on the steel cylinder, end plates arranged at both ends of the steel cylinder, copper cylinders arranged at both ends of the steel shaft for end plate conduction, and copper rings arranged on the copper cylinders. The specifications of the cathode roll width have developed from 1150mm, 1380mm, 1400mm, 1420mm, 1520mm, etc. to 2000mm. Thus, new requirements are put forward for the structure of the cathode roll, especially the conductive system.

[0003] The production of copper foil by electrolysis is actually a high-speed electroplating method, which must first meet the basic requirements of the electroplating process: that is, abide by Faraday's law of electrolysis. According to Faraday's law of electrolysis, the amount of substance deposited is proportional to the electric charge passed. As the width of the cathode roll continuously increases, the conductive area of the cathode roll conductive system also has to continuously increase, so as to ensure that there is sufficient current on the surface of the extra-wide cathode roll. Since the cathode roll is a device with a large volume and a large passing current, its electrical conductivity requirement is very high. If the electrical conductivity is insufficient, phenomena such as local heating of the roll surface, heating of the shaft end, and mottling of the copper foil will occur, seriously affecting the quality of the copper foil. Especially for the extra-wide cathode roll, with a large volume and a larger passing current, the requirements for the conductive system supplying power to the roll surface are higher.

[0004] According to a novel internal conductive device for a cathode roll disclosed in the publication number CN210796661U, by adding a copper sleeve and a conductive copper side plate on the cathode roll core and forming a mesh-like uniform distribution with copper wires therein, the current dissipation is made uniform. However, the middle copper wire is conductively connected to the conductive copper ring, and the conductive copper ring is connected to the copper sleeves at both ends for conduction. When there are connection hidden dangers in the copper sleeves at both ends, it will affect the power supply of all structures, and the structure of this device is complex, and the rigidity of the cathode roll cannot be guaranteed. Summary of the Invention

[0005] The purpose of the present invention is to provide a structure of an extra-wide cathode roll with high electrical conductivity, good electrical conductivity, uniform distribution of the conductive device, which can provide secondary compensation current when there are connection hidden dangers between the long copper cylinders at both ends and the steel shaft, and has good rigidity and stable structure.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A super-wide cathode roller structure with high electrical conductivity, comprising a steel shaft, a steel cylinder, a titanium cylinder, a sealing end plate, a long copper cylinder, and a copper ring. Between the steel shaft and the steel cylinder, there are copper support rib plates for support, which are evenly arranged along the circumferential direction of the steel shaft. The copper support rib plates are electrically connected to both the steel shaft and the steel cylinder, and on the copper support rib plates, there are also second long reinforcing ribs for enhancing support.

[0007] Preferably, on the long copper cylinder inside the sealing end plate, there is a copper support large flat plate electrically arranged, and the outer peripheral circular edge of the copper support large flat plate is electrically connected to the inner surface of the steel cylinder.

[0008] Preferably, between the copper support large flat plate and the sealing end plate, there is a first long reinforcing rib.

[0009] Preferably, both the first long reinforcing rib and the second long reinforcing rib are thin plates with one end being a trapezoidal side and the other end being a straight side; the trapezoidal side of the first long reinforcing rib is fixedly connected to the copper support large flat plate, and the straight side of the first long reinforcing rib is fixedly connected to the sealing end plate; the second long reinforcing rib is perpendicular to the copper support rib plate, and the straight side of the second long reinforcing rib is fixedly connected to the copper support rib plate.

[0010] Preferably, on the steel shaft inside the copper support large flat plates at both ends, there are respectively first short copper cylinders. The inner end of the long copper cylinder is provided with a circle of convex platforms that match and are tightly clamped and electrically connected to a circle of grooves provided on one end face of the first short copper cylinder; the first short copper cylinder is electrically fixedly connected to the steel shaft.

[0011] Preferably, on the steel shaft between the two first short copper cylinders, there is at least one second short copper cylinder provided, and the second short copper cylinder is electrically connected to the steel shaft and the first short copper cylinder respectively.

[0012] Preferably, the first short copper cylinder, the second short copper cylinder and the steel shaft are fixedly connected by pins, and the pin holes are sealed by copper welding. After the first short copper cylinder, the second short copper cylinder and the steel shaft are firmly attached, they are then welded and fixed.

[0013] Preferably, on the outer surface of the other end of the circle of grooves of the first short copper cylinder, there are transverse grooves designed in the circumferential direction. On the outer surfaces of both ends of the second short copper cylinder, there are transverse grooves designed in the circumferential direction. Between the first short copper cylinder and the second short copper cylinder, and between the second short copper cylinders, there are copper connection bars, and the copper connection bars are installed and fixed in the transverse grooves at the ends of the first short copper cylinder and the second short copper cylinder and are electrically connected.

[0014] Preferably, the copper support rib plate is a straight plate with a large arc edge at the upper part and a small arc edge at the bottom. The small arc edge at the bottom of the copper support rib plate has the same circumferential radian as the outer circumference of the second short copper cylinder and is electrically fixedly connected to the second short copper cylinder.

[0015] Preferably, a conductive reinforcing arc plate is provided between the copper support rib plate and the steel cylinder, and between the large copper support flat plate and the steel cylinder. The inner surface of the conductive reinforcing arc plate is in conductive fixed connection with the outer circumferential arc edge of the copper support rib plate and the large copper support flat plate.

[0016] Preferably, copper wires are provided between the steel cylinder and the titanium cylinder. The copper wires are evenly and tightly wound on the surface of the steel cylinder, and the titanium cylinder is sleeved on the copper wires by interference hot fitting.

[0017] The present invention has the following beneficial effects: By providing large copper support flat plates at both ends of the steel cylinder, and the large copper support flat plate is a whole sheet material, while increasing the conductive area, the rigidity at both ends of the steel cylinder is greatly improved; the sealing end plates at both ends of the steel cylinder connect the steel cylinder into a whole, greatly enhancing the surface rigidity of the steel cylinder; installing the first short copper cylinder and the second short copper cylinder on the steel shaft, and installing copper connection bars between the first short copper cylinder and the second short copper cylinder, and between the second short copper cylinders, and providing a copper support rib plate on the second short copper cylinder are all for increasing conductivity. When there are potential problems at the welding joint between the long copper cylinder and the large copper support flat plate and the power quantity drops, these devices for increasing conductivity can perform secondary compensation on the conductive quantity of the cathode roller surface, making the power quantity on the cathode roller surface stable and uniform; providing the first long reinforcing rib and the second long reinforcing rib on the large copper support flat plate and the copper support rib plate respectively is for enhancing the rigidity of the cathode roller, and the copper wires evenly and tightly wound between the steel cylinder and the titanium cylinder ensure sufficient and stable conductive quantity on the cathode roller surface, improving the quality of the copper foil processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the overall assembly drawing of the structure of the ultra-wide cathode roller with high conductivity of the present invention.

[0019] Figure 2 It is the right view of the overall assembly drawing of the structure of the ultra-wide cathode roller with high conductivity of the present invention.

[0020] Figure 3 It is the schematic diagram of the first short copper cylinder of the present invention.

[0021] Figure 4 It is the schematic diagram of the second short copper cylinder of the present invention.

[0022] Figure 5 It is the schematic diagram of the first long reinforcing rib and the second long reinforcing rib of the present invention.

[0023] Figure 6 It is the schematic diagram of the copper support rib plate of the present invention.

[0024] Wherein: 1. Steel shaft; 2. Long copper cylinder; 3. Copper ring; 4. Sealing end plate; 5. First long reinforcing rib; 6. Large copper support flat plate; 7. Conductive reinforcing arc plate; 8. Steel cylinder; 9. Copper wire; 10. Titanium cylinder; 11. Second long reinforcing rib; 12. First short copper cylinder; 13. Second short copper cylinder; 14. Copper connecting bar; 15. Copper support rib plate. Detailed implementation mode

[0025] The present invention will be specifically described below with reference to the accompanying drawings. As Figures 1 to 6 shown, the present invention provides a technical solution: a structure of an ultra-wide cathode roller with high electrical conductivity, including a steel shaft 1, a steel cylinder 8, a titanium cylinder 10, a sealing end plate 4, a copper support rib plate 15 and a second long reinforcing rib 11; the steel shaft 1 is an integral structure, machined from a single blank in one go, with a larger outer diameter in the central section of the steel shaft 1 and a thinner structure at both ends. The steel cylinder 8 is sleeved on the steel shaft 1, and a copper support rib plate 15 is fixedly arranged between the steel shaft 1 and the steel cylinder 8. A second long reinforcing rib 11 for strengthening support is arranged on the copper support rib plate 15. The copper support rib plate 15 is electrically connected to both the steel shaft 1 and the steel cylinder 8; the center of the sealing end plate 4 passes through the steel shaft 1 and is respectively fixedly arranged on the two end faces of the steel cylinder 8. The sealing end plate 4 seals the inner cavity of the steel cylinder 8, making the steel cylinder 8 form an integral structure to increase rigidity and electrical conductivity; the titanium cylinder 10 is thermally assembled outside the steel cylinder 8, and uniform and dense copper wires 9 are arranged between the steel cylinder 8 and the titanium cylinder 10 to ensure sufficient and stable electrical conductivity on the roller surface; at the positions of the sealing end plates 4 at both ends of the steel shaft 1, long copper cylinders 2 are interference-fitted on the steel shaft 1; thicker copper rings 3 are transition-fitted on each long copper cylinder 2; inside the sealing end plate 4, a large copper support flat plate 6 is electrically fixed on the long copper cylinder 2, and a first long reinforcing rib 5 is fixedly arranged between the large copper support flat plate 6 and the sealing end plate 4 to increase rigidity; first short copper cylinders 12 are arranged on the steel shaft 1 inside the large copper support flat plates 6 at both ends, and second short copper cylinders 13 are arranged on the steel shaft 1 inside the first short copper cylinders 12. Three second short copper cylinders 13 are evenly arranged in the middle part of the steel shaft 1. Copper connecting bars 14 are arranged between the second short copper cylinders 13 and the first short copper cylinders 12; six copper support rib plates 15 are evenly arranged in the circumferential direction of the second short copper cylinders 13. The bottom of the copper support rib plates 15 is electrically connected to the second short copper cylinders 13, and a conductive reinforcing arc plate 7 is arranged between the upper part and the steel cylinder 8. Second long reinforcing ribs 11 are arranged on the plane of the copper support rib plates 15 to increase the rigidity of the steel cylinder 8.

[0026] The specific steps are as follows:

[0027] First, silver is plated at the positions where the first short copper cylinder 12 and the second short copper cylinder 13 are to be installed on the steel shaft 1. After the silver layer is plated, the first short copper cylinder 12 and the second short copper cylinder 13 are sleeved in sequence. The first short copper cylinder 12 is a cylindrical structure with a through-hole. The end face of the first short copper cylinder 12 adjacent to the long copper cylinder 2 is provided with a circle of grooves matching the convex platform on the end face of the long copper cylinder 2 for one circle. On the outer surface at the other end of the circle of grooves of the first short copper cylinder 12, transverse grooves are designed in the circumferential direction. The second short copper cylinder 13 is a cylindrical structure with a through-hole. On the outer surfaces at both ends of the second short copper cylinder 13, transverse grooves are designed in the circumferential direction. The first short copper cylinder 12 and the second short copper cylinder 13 are fixed with pins. After the first short copper cylinder 12 and the second short copper cylinder 13 are firmly attached to the steel shaft 1, welding is carried out, and the pin holes are sealed with copper welding. Three second short copper cylinders 13 are evenly arranged in the middle of the steel shaft 1, and the first short copper cylinders 12 are arranged at both ends respectively, which play a role of support and positioning. At the same time, the conductive area is increased and the conductive amount is improved.

[0028] Then, long copper cylinders 2 are sleeved at both ends of the steel shaft 1 respectively. The long copper cylinder 2 is a cylindrical hollow structure, and the end face facing inward of the long copper cylinder 2 is provided with a circle of convex platforms. The long copper cylinder 2 and the steel shaft 1 are in an interference hot assembly form, which ensures that the long copper cylinder 2 and the steel shaft 1 are closely attached, increases the conductive area, and strengthens the rigidity of the steel shaft 1 near both ends at the same time. One end of the long copper cylinder 2 facing inward is provided with a circle of convex platforms that cooperate with a circle of grooves of the first short copper cylinder 12. The convex platform end of the long copper cylinder 2 for one circle is inserted into the circle of grooves of the first short copper cylinder 12 to make the two end faces flush, so that the long copper cylinder 2 is firmly positioned.

[0029] A thick steel plate of a certain size is rolled into a steel cylinder 8, and the butt edges are continuously welded. After the welding is completed, the steel cylinder 8 is shaped. After shaping, the inner diameter of the steel cylinder 8 is machined. At the same time, the corner materials of the copper support large flat plate 6 are cut. The material is conductive copper sheet, and the conductive reinforcing arc plate 7 blank is spliced and welded. According to the inner surface size of the steel cylinder 8, the spliced blank is rolled into a material cylinder, and the outer diameter of the cylinder is 2 mm larger than the inner diameter of the steel cylinder 8, and then welded. After the welding is completed, the material cylinder is shaped, and the outer diameter of the material cylinder is machined to be the same as the inner diameter of the steel cylinder 8, and the material cylinder is cut to obtain the conductive reinforcing arc plate 7. The position of the conductive reinforcing arc plate 7 is determined on the inner surface of the steel cylinder 8, and the conductive reinforcing arc plate 7 and the steel cylinder 8 are spot welded in groups. Between the conductive reinforcing arc plate 7 and the second short copper cylinder 13, the copper support rib plates 15 are welded in groups in sequence. The large arc edge in the width direction of the copper support rib plate 15 is attached to the inner surface of the conductive reinforcing arc plate 7. On the large plane of the copper support rib plate 15, the second long reinforcing rib 11 is welded in groups. In this way, the conductive area is increased twice, and the rigidity of the ultra-wide roller surface is strengthened.

[0030] After the second-longest reinforcing rib 11 is welded to the copper support rib plate 15 and the second-short copper cylinder 13, the copper connecting bar 14 is installed successively. On the outer surfaces at one end of the first-short copper cylinder 12 and both ends of the second-short copper cylinder 13, in the transverse grooves in the circumferential direction, the copper connecting bar 14 is installed for conductive connection to enhance the conductivity between the first-short copper cylinder 12 and the second-short copper cylinder 13 and between the second-short copper cylinders 13, and the assembly edges are continuously welded; then, the copper support large flat plate 6 is sleeved onto the long copper cylinder 2 and connected and welded, and the copper support large flat plate 6 is assembled and welded to the first-short copper cylinder 12 and the conductive reinforcing arc plate 7. Since the copper support large flat plate 6 is a whole plate, while increasing the conductive area, it greatly strengthens the support for both ends of the ultra-wide steel cylinder 8 and enhances the rigidity. The copper connecting bar 14 is a conductive copper strip. Its function is to timely supplement the conductive amount of the cathode roller surface for secondary compensation when there are hidden dangers at the connection weld of the copper support large flat plate 6 and the long copper cylinder 2 and the conductive amount decreases, so as to make the electric quantity on the cathode roller surface stable and uniform. At the position of the copper support large flat plate 6, the first-long reinforcing rib 5 and the sealing end plate 4 are assembled and welded successively. The first-long reinforcing rib 5 is arranged between the copper support large flat plate 6 and the sealing end plate 4, which increases the rigidity of the copper support large flat plate 6 and the sealing end plate 4 at the same time. And the sealing end plate 4 is designed at the end face of the steel cylinder 8 and welded to the steel cylinder 8 as a whole, which greatly improves the surface rigidity of the steel cylinder 8. After welding is completed, the surface of the steel cylinder 8 is machined to ensure the straightness and roundness of the surface of the steel cylinder 8. Then, on the surface of the steel cylinder 8, through special equipment, the copper wire 9 is evenly and tightly wound on the surface of the steel cylinder 8 to ensure the uniformity of the thickness of the conductive copper layer on the surface of the steel cylinder 8, so that the conductive amount on the cathode roller surface is sufficient and stable, and the quality of the copper foil processed can be improved.

[0031] After silver plating on the inner surface of the titanium cylinder 10, on the outer surface of the conductive copper layer of the steel cylinder 8, the titanium cylinder 10 and the steel cylinder 8 are assembled by interference hot fit. Then, the circumference of the steel cylinder 8 is welded to the inner surface of the titanium cylinder 10. After welding is completed, the surface of the titanium cylinder 10 is machined. Then, silver plating is carried out on the installation surfaces of the long copper cylinder 2 and the copper ring 3. After silver plating, the copper ring 3 is transitionally assembled onto the long copper cylinder 2. The copper ring 3 is a relatively thick copper ring 3, and two are provided on each end of the long copper cylinder 2, making the silver-plated surfaces of the long copper cylinder 2 and the steel shaft 1 fit more closely, greatly increasing the conductive area and improving the conductive amount.

[0032] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. It should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

Claims

1. A super-wide cathode roller structure with high electrical conductivity, comprising a steel shaft, a steel cylinder, a titanium cylinder, a sealing end plate, a long copper cylinder and a copper ring, characterized in that, The steel cylinder is sleeved on the steel shaft. Between the steel shaft and the steel cylinder, there are copper support rib plates for support. The copper support rib plates are straight plates with a large arc edge at the upper part and a small arc edge at the bottom. The copper support rib plates are evenly arranged along the circumferential direction of the steel shaft. The copper support rib plates are electrically connected to both the steel shaft and the steel cylinder. There are also second long reinforcing ribs for strengthening the support on the copper support rib plates. The titanium cylinder is assembled outside the steel cylinder. The sealing end plates are respectively fixed on the two end faces of the steel cylinder. Long copper cylinders are assembled on the steel shaft at the positions of the two sealing end plates. On the long copper cylinder inside the sealing end plate, there is a copper support large flat plate electrically arranged. The outer circumferential edge of the copper support large flat plate is electrically connected to the inner surface of the steel cylinder. Between the copper support large flat plate and the sealing end plate, there is a first long reinforcing rib. Both the first long reinforcing rib and the second long reinforcing rib are thin plates with a trapezoidal edge at one end and a straight edge at the other end. The trapezoidal edge of the first long reinforcing rib is fixedly connected to the copper support large flat plate, and the straight edge of the first long reinforcing rib is fixedly connected to the sealing end plate. The second long reinforcing rib is arranged perpendicular to the copper support rib plate, and the straight edge of the second long reinforcing rib is fixedly connected to the copper support rib plate. Copper rings are assembled on the long copper cylinders.

2. The structure of the ultra-wide cathode roller with high electrical conductivity according to claim 1, characterized in that, On the steel shaft inside the copper support large flat plates at both ends, there are respectively first short copper cylinders. The long copper cylinder is provided with a convex ring at the inner end, which matches and is clamped and electrically connected to a groove ring arranged on one end face of the first short copper cylinder. The first short copper cylinder is electrically and fixedly connected to the steel shaft.

3. The structure of the ultra-wide cathode roll with high conductivity according to claim 2, characterized in that, On the steel shaft between the two first short copper cylinders, there is at least one second short copper cylinder. The second short copper cylinder is electrically connected to the steel shaft and the first short copper cylinder respectively.

4. The structure of the ultra-wide cathode roller with high conductivity according to claim 3, characterized in that, The first short copper cylinder, the second short copper cylinder and the steel shaft are fixedly connected by pins, and the pin holes are sealed by copper welding. After the first short copper cylinder, the second short copper cylinder and the steel shaft are firmly fitted, they are welded and fixed.

5. The structure of the ultra-wide cathode roll with high conductivity according to claim 4, characterized in that, On the outer surface at the other end of the groove ring of the first short copper cylinder, there are transverse grooves designed in the circumferential direction. On the outer surfaces at both ends of the second short copper cylinder, there are transverse grooves designed in the circumferential direction. Between the first short copper cylinder and the second short copper cylinder, and between the second short copper cylinders, there are copper connection bars. The copper connection bars are installed and fixed in the transverse grooves at the ends of the first short copper cylinder and the second short copper cylinder and are electrically connected.

6. The structure of the ultra-wide cathode roller with high conductivity according to claim 3, characterized in that The small arc edge at the bottom of the copper support rib plate has the same circumferential radian as the outer circumference of the second short copper cylinder and is electrically and fixedly connected to the second short copper cylinder.

7. The structure of the ultra-wide cathode roll with high electrical conductivity according to claim 1, characterized in that, Between the copper support rib plate and the steel cylinder, and between the copper support large flat plate and the steel cylinder, there are conductive reinforcing arc plates. The inner surface of the conductive reinforcing arc plate is in conductive and fixed connection with the outer circumferential arc edges of the copper support rib plate and the copper support large flat plate.

8. The structure of the ultra-wide cathode roll with high conductivity according to claim 1, characterized in that There are copper wires between the steel cylinder and the titanium cylinder. The copper wires are evenly and tightly wound on the surface of the steel cylinder. The titanium cylinder is press-fitted and heat-mounted on the copper wires.

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