Conductive copper plate cladding tooling and process thereof

Abstract

A conductive copper plate coating tool and process thereof, the coating tool comprising a steel support bracket, a roller core is placed on the shaft support of the steel support bracket, a copper plate is attached to the surface of the roller core, and a hook is connected to a pull ring through a tightener; the coating process comprises turning a plurality of conical grooves on the surface of the roller core; calculating the size of the copper plate according to the size of the processed roller core; stress relieving annealing the cut copper plate; completing the connection of all copper bolts; and finally repeating the riveting of the entire copper plate according to the above method; the use of a copper plate overall covering and bonding method greatly promotes the uniformity of current density during the conduction process; because a copper plate with a length of 1 / 3 of the circumference of the roller surface is used, it can ensure that the copper plate is in full contact with the roller core while reducing the number of welds between the copper plates, thereby avoiding the problems of uneven conduction and poor bonding caused by too many welds; the present invention has the characteristics of simple operation and effective solution to uneven conduction.

Description

Technical Field

[0001] The invention relates to the technical field of cathode roller processing and manufacturing, and in particular to a conductive copper plate coating tool and a process thereof. Background Art

[0002] With the rapid development of new energy and electronic circuit industries, my country's quality requirements for electrolytic copper foil are also constantly increasing. The cathode roller is the core component in the manufacturing process of electrolytic copper foil, and its quality plays a decisive role in the quality of the generated copper foil.

[0003] The cathode roller is a key equipment in the production of electrolytic copper foil. The principle is to generate electrolytic copper foil by electrolytic deposition of copper ions on the surface of its roller cathode. The uniformity of the current density on the roller surface determines the quality of the electrolytic copper foil. Therefore, ensuring that the current can reach the roller surface smoothly and whether the current can be evenly distributed on the roller surface is the main problem faced at this stage.

[0004] The roller surface structure of the cathode roller is composed of steel-copper-titanium from the inside to the outside. The copper layer is used as a conductive layer, which directly determines the uniformity and consistency of the current on the roller surface. At present, the copper wire and copper belt can ensure the uniformity of the copper layer, but the contact with the roller surface is not tight enough, and there will be gaps in the connection between each other. Under the support of large current, the points with poor contact will generate heat and the roller surface current will be uneven. Although the composite plate can ensure the complete fit between the copper and steel layers, it has high processing requirements and the cost of the material itself is high, which has an adverse effect on production.

[0005] Chinese patent CN201588003U discloses a wire-wound cathode roller core, including a steel body, a copper body arranged outside the steel body, the copper body being a copper layer formed by tightly winding copper wire on the steel body, and the copper wire adopts a square copper wire. Due to the adoption of the above technical scheme, the utility model has the advantages of low production cost, smooth surface of the cathode roller core, uniform thickness of the copper body and good conductivity. However, since the patent application adopts copper wire winding, the gap between the roller surface and the copper wire is too large, which has the disadvantages of easy poor contact and uneven current. Summary of the invention

[0006] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a conductive copper plate coating tooling and a process thereof, which utilizes the pressure generated by a rolling roller through a tightening wheel to squeeze the stress-relief annealed copper plate and the roller core together, and performs drilling and tapping, and firmly connects the copper plate and the roller core together, thereby solving the problems of uneven copper layer, uneven conductivity and high cost of the cathode roller core.

[0007] A conductive copper plate coating tooling comprises a steel support frame, a connecting rib is arranged in the middle of the steel support frame, a shaft support is arranged on the top of the steel support frame, a roller core is placed on the shaft support, the copper plate is attached to the surface of the roller core, hooks are respectively arranged on both radial sides of the bottom of the steel support frame, the hooks are connected to the pull rings through a tightener, the pull rings are respectively connected to the two ends of a steel strip attached to the surface of the copper plate, and a rolling roller is placed between the copper plate and the steel strip.

[0008] The connecting ribs of the steel support frame are provided with fixing bolts.

[0009] The surface of the roller core is provided with a conical groove.

[0010] The copper plate has a length of 1 / 3 of the circumference of the outer surface of the roller core, and a V-shaped groove is arranged on the edge of the copper plate.

[0011] The rolling roller is a steel rod with a plurality of knurling patterns on its surface, which match the distance between the steel strips, and the pressing position corresponding to the steel strip is a smooth surface.

[0012] A conductive copper plate coating process, the specific steps are as follows:

[0013] Step 1: Place the welded roller core on a lathe, turn the roller surface of the roller core into a circle with a roundness of ≤0.3, and evenly turn a tapered groove with a depth of 0.1 to 0.3 mm on the surface of the turned roller core;

[0014] Step 2: Calculate the length l and width d of the copper plate according to the width L, diameter D and thickness t of the processed roller core; the length l of the copper plate = L-15 mm, the width d of the copper plate = (πD / 3)-1.5t, where L is the width of the roller core, D is the diameter of the roller core, and t is the thickness of the copper plate;

[0015] Step 3: Put the cut copper plate into a muffle furnace at a temperature of 260-280℃, keep it warm for 1-1.5 hours, perform stress relief annealing, then take it out and put it into the plate rolling machine for shape correction. The shape correction arc of the copper plate is consistent with the curvature of the roller core, and stick it to the upper surface of the roller core;

[0016] Step 4: Place the rolling roller between the copper plate and the steel strip, with the knurled position of the rolling roller in contact with the copper plate. Hang one end of the pull ring on the hook, connect the other end of the pull ring through the tensioner and hang the steel strip on the hook. Rotate the tensioner to make the steel strip close to the copper plate. After rotating the tensioner 200-240mm, drill a hole at the edge of the copper plate axially perpendicular to the roller core position. The drilling depth is 8-10mm and the drilling diameter is 4-8mm. Tap the hole and screw the copper bolt into the hole at the same time. Complete the riveting of all copper bolts in sequence. Repeat the drilling as needed.

[0017] Step 5: Repeat the method in step 4 to complete the riveting of the entire copper plate, loosen the tightener, remove the steel belt, rotate 120°, and then put the second copper plate on. The distance between the first copper plate and the second copper plate is 8-12mm. Repeat steps 3, 4, and 5 to complete the final copper plate wrapping.

[0018] The drilling in step 4 needs to keep the positions of the holes drilled staggered each time.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] Since the copper plate is used for overall covering and bonding, the consistency of the copper layer after final turning can be guaranteed to be less than 0.3mm, which greatly promotes the uniformity of current density during the conduction process.

[0021] By using a copper plate with a length of 1 / 3 of the circumference of the outer surface of the roller core, it is possible to ensure that the copper plate is in full contact with the roller core while reducing the number of welds between the copper plates, thus avoiding the problems of uneven conductivity and poor fitting caused by too many welds.

[0022] The fixing bolts on the connecting ribs of the steel support frame can prevent the roller core from swinging, thus preventing the rolling roller from sliding or moving during rotation.

[0023] The tensioner can adjust the tightness of the steel belt, thereby ensuring that the copper plate can be tightened on the surface of the roller core, providing a pre-lamination force. The rolling roller further increases the fit between the copper plate and the roller core after rolling, and is beneficial to the consistency of drilling holes with the electric drill. The knurling on the surface increases friction and avoids slipping during rotation.

[0024] Since the steel strip has a certain width, the area in contact with copper is increased during the tightening process, thus avoiding damage to the copper layer.

[0025] Compared with the prior art, the present invention utilizes the pressure generated by the rolling roller through the tightener to squeeze the stress-relieved annealed copper plate and the roller core together, and performs drilling and tapping, and firmly connects the copper plate and the roller core together through screws, which not only solves the connection problem between the copper plate and the steel plate, but also avoids the problem of uneven conductivity, and effectively reduces the production cost and cycle. It has a simple structure and a convenient and practical operation method. It not only solves the problem of insufficient contact between the copper plate and the roller surface, and between the copper strips, but also reduces the processing difficulty and material cost, and finally achieves a copper layer uniformity of less than 0.3 mm, which exceeds the requirement of current density consistency in copper foil production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2It is a schematic diagram of the partial structure enlargement of the copper bolt 10 and the rolling roller 11 in the present invention.

[0028] Figure 3 It is a schematic diagram of the structure of the roller core 2 in the present invention.

[0029] Figure 4 It is a schematic diagram of the structure of the tapered groove 12 in the present invention.

[0030] Figure 5 It is a schematic structural diagram of the V-shaped groove 13 in the present invention.

[0031] Figure 6 It is a schematic structural diagram of the rolling roller 11 in the present invention.

[0032] In the figure: 1. Copper plate; 2. Roller core; 3. Steel support frame; 3-1. Connecting ribs; 4. Tightening bolts; 5. Hook; 6. Tightener; 7. Pull ring; 8. Steel belt; 9. Electric drill; 10. Copper bolt; 11. Rolling roller; 12. Conical groove; 13. V-shaped groove; 14. Knurling; 15. Smooth surface; 16. Shaft support. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1 and Figure 2 A conductive copper plate coating tooling comprises a steel support frame 3, a connecting rib 3-1 is arranged in the middle of the steel support frame 3, a shaft support 16 is arranged on the top of the steel support frame 3, and a fixing bolt 4 is arranged on the connecting rib 3-1 of the steel support frame 3, and the fixing bolt 4 can prevent the roller core 2 from swinging and prevent the rolling roller 11 from sliding or moving during rotation; the roller core 2 is placed on the shaft support 16 of the steel support frame 3, and the copper plate 1 is attached to the surface of the roller core 2. Hooks 5 are respectively arranged on both radial sides of the bottom of the steel support frame 3, and the hooks 5 are connected to the pull ring 7 through the tightener 6. The pull ring 7 is respectively connected to the two ends of the steel belt 8 attached to the surface of the copper plate 1, and the rolling roller 11 is placed between the copper plate 1 and the steel belt 8. An electric drill 9 is used to drill holes for connecting the copper bolts 10.

[0035] See also Figure 3 and Figure 4 The surface of the roller core 2 is provided with a conical groove 12.

[0036] See also Figure 1 and Figure 5 The copper plate 1 has a length of 1 / 3 of the circumference of the outer surface of the roller core 2, and a V-shaped groove 13 is provided on the edge of the copper plate 1 to facilitate welding.

[0037] See also Figure 1The steel support frame 3 described in this embodiment is formed by cutting and welding several channel steels according to the required size, and has a transverse connecting rib 3-1 at each of the two axial end faces. The connecting rib 3-1 is fixed to the steel support frame 3 by welding, and has two threaded holes and is equipped with a fixing bolt 4. The main function is to fix the roller core 2 at the required position to prevent the roller core 2 from rotating.

[0038] See also Figure 1 Five hooks 5 are welded on the channel steels at the bottom of the radial sides of the steel support frame 3, and are evenly distributed on the side of the connecting plate of the steel support frame 3 to withstand tension and enable the copper plate 1 to fit the surface of the roller core 2.

[0039] See also Figure 1 The steel strip 8 is cut from 5 steel plates with a thickness of 1-3 mm.

[0040] See also Figure 1 The pull ring 7 is formed by bending a steel rod, and the pull ring 7 is welded to both ends of the steel belt 8. One end of the pull ring 7 is connected to the hook 5, and the other end of the pull ring 7 is connected to the tightener 6, and the other end of the tightener 6 is connected to the hook 5.

[0041] See also Figure 1 and Figure 2 The copper bolt 10 is a M6-M8 bolt.

[0042] See also Figure 6 The rolling roller 11 is turned from a steel bar, and a knurling 14 is turned on the surface. The knurling 14 has 4 sections, and its length is the same as the spacing between the hooks 5. Handles are welded at both ends of the rolling roller 11 to facilitate the rotation and force application of the rolling roller 11. The contact position between the steel belt 8 and the rolling roller 11 is a smooth surface 15.

[0043] Example 1

[0044] A conductive copper plate coating process, the specific steps are as follows:

[0045] Step 1: Place the welded roller core 2 on a lathe, turn the roller surface of the roller core 2 into a round shape with a roundness of 0.1, and evenly turn a tapered groove 12 with a depth of 0.3 mm on the surface of the turned roller core 2;

[0046] Step 2: Calculate the length l and width d of the copper plate 1 according to the width L and diameter D of the processed roller core 2 and the thickness t of the copper plate 1; the length l of the copper plate 1 = L-15 mm, the width d of the copper plate 1 = (πD / 3)-1.5t, where L is the width of the roller core 2, D is the diameter of the roller core 2, and t is the thickness of the copper plate 1;

[0047] Take L = 1200, D = 2500, t = 5 to obtain:

[0048] Length l = L-15mm = 1185mm;

[0049] Width d = (πD / 3) - 1.5t = 2609 mm,

[0050] Therefore, select the copper plate 1 of 1185mm*2609mm*5mm;

[0051] Step 3: Place the cut copper plate 1 in a muffle furnace at 260°C for 1.5 hours for stress relief annealing, then take it out and place it in a plate rolling machine for shape correction. The shape correction arc of the copper plate 1 is consistent with the arc of the roller core 2, and it is attached to the upper surface of the roller core 2;

[0052] Step 4: Place the rolling roller 11 between the copper plate 1 and the steel belt 8, the knurling 14 of the rolling roller 11 is in contact with the copper plate 1, one end of the pull ring 7 is hung on the hook 5, the other end of the pull ring 7 is connected through the tensioner 6 and the steel belt 8 is hung on the hook 5, the tensioner 6 is rotated to make the steel belt 8 close to the copper plate 1, and after the tensioner 6 is rotated 200mm, a hole is drilled at the edge of the copper plate 1 axially perpendicular to the roller core 2, the drilling depth is 8mm, the drilling diameter is 6mm, and a total of 11 holes are drilled. , and tapping is performed, and the copper bolts 10 are screwed into the holes at the same time, and the riveting of all the copper bolts 10 is completed in sequence; in order to make the fitting area between the roller core 2 and the copper plate 1 larger, the rolling roller 11 is rotated again and after passing 200mm on the surface of the copper plate, holes can be punched again, with a drilling depth of 8mm and a drilling diameter of 6mm. The drilling position is between the two holes of the last hole position, a total of 10 holes, and tapping is performed, and the copper bolts 10 are screwed into the holes at the same time, and the riveting of all the copper bolts 10 is completed in sequence;

[0053] Step 5: Repeat the method in step 4 to complete the riveting of the entire copper plate 1, loosen the tightener 6, remove the steel belt 8, rotate it 120°, and then put the second copper plate 1 on. The distance between the first copper plate 1 and the second copper plate 1 is 8mm. Repeat steps 3, 4, and 5 to complete the final copper plate wrapping.

[0054] Example 2

[0055] A conductive copper plate coating process, the specific steps are as follows:

[0056] Step 1: Place the welded roller core 2 on a lathe, turn the roller surface of the roller core 2 into a circle with a roundness of 0.1, and evenly turn tapered grooves 12 with a depth of 0.2 mm on the turned roller surface, distributed on the surface of the roller core 2;

[0057] Step 2: Calculate the length l and width d of the copper plate 1 according to the width L and diameter D of the processed roller core 2 and the thickness t of the copper plate 1; the length l of the copper plate 1 = L-15 mm, the width d of the copper plate 1 = (πD / 3)-1.5t, where L is the width of the roller core 2, D is the diameter of the roller core 2, and t is the thickness of the copper plate 1;

[0058] Take L = 1500mm, D = 2700mm, t = 6mm to get:

[0059] Length l = L-15mm = 1485mm;

[0060] Width d = (πD / 3) - 1.5t = 2817 mm,

[0061] Therefore, a copper plate 1 with a size of 1485mm*2817mm*6mm is selected;

[0062] Step 3: Place the cut copper plate 1 in a muffle furnace at 280°C for 1 hour for stress relief annealing, then take it out and place it in a plate rolling machine for shape correction. The shape correction arc of the copper plate 1 is consistent with the arc of the roller core 2, and it is attached to the upper surface of the roller core 2;

[0063] Step 4: Place the rolling roller 11 between the copper plate 1 and the steel belt 8, the knurling 14 of the rolling roller 11 is in contact with the copper plate 1, one end of the pull ring 7 is hung on the hook 5, the other end of the pull ring 7 is connected through the tensioner 6 and the steel belt 8 is hung on the hook 5, the tensioner 6 is rotated to make the steel belt 8 close to the copper plate 1, and after the tensioner 6 is rotated 200mm, a hole is drilled at the edge of the copper plate 1 axially perpendicular to the roller core 2, the drilling depth is 8mm, the drilling diameter is 6mm, and a total of 11 holes are drilled. , and tapping is performed, and the copper bolts 10 are screwed into the holes at the same time, and the riveting of all the copper bolts 10 is completed in sequence; in order to make the fitting area between the roller core 2 and the copper plate 1 larger, the rolling roller 11 is rotated again and after passing 240mm on the surface of the copper plate, a hole is punched again, the drilling depth is 8mm, the drilling diameter is 6mm, and the drilling position is between the two holes of the last hole position, a total of 10 holes, and tapping is performed, and the copper bolts 10 are screwed into the holes at the same time, and the riveting of all the copper bolts 10 is completed in sequence;

[0064] Step 5: Repeat the method in step 4 to complete the riveting of the entire copper plate 1, loosen the tightener 6, remove the steel belt 8, rotate it 120°, and then put the second copper plate 1 on. The distance between the first copper plate 1 and the second copper plate 1 is 10mm. Repeat steps 3, 4, and 5 to complete the final copper plate wrapping.

[0065] Due to the use of the method of wrapping the copper plate as a whole, the thickness uniformity of the copper layer of the copper plate 1 can be guaranteed to be within the range of 0.2mm after turning. The uniform thickness of the copper plate 1 ensures the uniformity of the current density. By welding the copper plate 1 in sections, the bonding rate can be increased to more than 95% while reducing the uneven conductivity caused by the weld, further reducing the contact resistance. During use, the present invention provides pressure through the tightener 6 so that the copper plate 1 can fit tightly, and the copper plate 1 is firmly fixed to the surface of the roller core 2 by riveting. The use of the copper plate 1 reduces the heating and even sparking of the contact points caused by poor contact by more than 50% compared to copper strips or copper wires. While improving the quality requirements, the present invention reduces the direct cost of materials by 20%, increases the production efficiency by 10%, and greatly guarantees the consistency of the products.

Claims

1. A conductive copper plate cladding tool, comprising a steel support frame (3), a connecting rib (3-1) is arranged in the middle of the steel support frame (3), and a shaft support (16) is arranged at the top of the steel support frame (3), characterized in that: The roller core (2) is placed on the shaft support (16), the copper plate (1) is attached to the surface of the roller core (2), and hooks (5) are respectively arranged on both radial sides of the bottom of the steel support frame (3), the hooks (5) are connected to the pull ring (7) through the tightener (6), and the pull ring (7) is respectively connected to the two ends of the steel belt (8) attached to the surface of the copper plate (1), and the rolling roller (11) is placed between the copper plate (1) and the steel belt (8); the connecting ribs (3-1) of the steel support frame (3) are provided with fixing bolts (4).

2. A conductive copper plate cladding tool according to claim 1, characterized in that: The surface of the roller core (2) is provided with a conical groove (12).

3. A conductive copper plate cladding tool according to claim 1, characterized in that: A V-shaped groove (13) is provided on the edge of the copper plate (1).

4. A conductive copper plate cladding tool according to claim 1, characterized in that: The rolling roller (11) is a steel rod with a plurality of knurling patterns (14) on its surface, which are matched with the distance between the steel strip (8), and the pressing position corresponding to the steel strip (8) is a smooth surface (15).

5. A process for coating a conductive copper plate using the coating tooling according to any one of claims 1 to 4, characterized in that: The specific steps are as follows: Step 1: placing the welded roller core (2) on a lathe, turning the roller surface of the roller core (2) into a round shape, wherein the roundness is ≤0.3, and evenly turning a tapered groove (12) with a depth of 0.1 to 0.3 mm on the surface of the turned roller core (2); Step 2: Calculate the length l and width d of the copper plate (1) based on the width L and diameter D of the processed roller core (2) and the thickness t of the copper plate (1); the length l of the copper plate (1) = L-15 mm, and the width d of the copper plate (1) = (πD / 3)-1.5t, where L is the width of the roller core (2), D is the diameter of the roller core (2), and t is the thickness of the copper plate (1); Step 3: Place the cut copper plate (1) in a muffle furnace at a temperature of 260-280°C, keep the temperature for 1-1.5 hours, perform stress relief annealing, then take it out and place it in a plate rolling machine for shape adjustment. The arc of the copper plate is consistent with the arc of the roller core (2), and it is attached to the upper surface of the roller core (2); Step 4: Place the rolling roller (11) between the copper plate (1) and the steel strip (8), with the knurling (14) of the rolling roller (11) in contact with the copper plate (1), hang one end of the pull ring (7) on the hook (5), connect the other end of the pull ring (7) through the tensioner (6) and hang the steel strip (8) on the hook (5), rotate the tensioner (6) to make the steel strip (8) close to the copper plate (1), rotate the tensioner (6) 200-240mm, drill a hole at the edge of the copper plate (1) axially perpendicular to the roller core (2), the drilling depth is 8-10mm, the drilling diameter is 4-8mm, and tapping is performed, and the copper bolt (10) is screwed into the hole at the same time, and the riveting of all the copper bolts (10) is completed in sequence, and the drilling can be repeated as needed; Step 5: Repeat the method of step 4 to complete the riveting of the entire copper plate (1), loosen the tightener (6), remove the steel belt (8), rotate it 120 degrees, and then put the second copper plate (1). The distance between the first copper plate (1) and the second copper plate (1) is 8-12mm. Repeat steps 3, 4, and 5 to complete the wrapping of the final copper plate (1).

6. A process according to claim 5, characterized in that: The drilling in step 4 needs to keep the positions of the holes drilled staggered each time.

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