Cathode conductive roller for tungsten filament electroplating

Abstract

The utility model provides a cathode conductive roller for tungsten filament electroplating, which relates to the technical field of diamond wire cathode conductive rollers, and comprises a plurality of roller sheets which are sequentially stacked and are provided with a plurality of first through holes distributed along the circumferential direction; the clamping pieces are clamped at the two ends of the roller piece, and each clamping piece is provided with a center hole and a plurality of second through holes distributed in the circumferential direction; the plurality of conducting rods respectively penetrate through the first through holes and the second through holes to connect the plurality of roller sheets with the plurality of clamping sheets; the shaft assembly penetrates through the center holes of the clamping pieces, the shaft assembly comprises a main shaft, a first conduction piece and a plurality of second conduction pieces, the first conduction piece and the second conduction pieces are located in the main shaft, one ends of the second conduction pieces are connected with the first conduction piece, the other ends of the second conduction pieces stretch out of the main shaft, and the first conduction piece and the second conduction pieces are arranged on the main shaft. The plurality of second conduction pieces are distributed along the length direction of the first conduction piece, and the conductive roller has the characteristic of uniform electroplated layer.

Description

Technical Field

[0001] The utility model relates to the technical field of diamond wire cathode conductive rollers, in particular to a cathode conductive roller for tungsten wire electroplating. Background Art

[0002] Diamond wire is a wire cutting tool made by electrochemically bonding diamond abrasive grains to the surface of a metal busbar. It is produced continuously, so during the electroplating process, it must pass through an energized cathode conductive roller to deposit diamond and nickel on the metal busbar surface. With the rapid development of the photovoltaic industry, the diameter of diamond wire for photovoltaic slicing has been reduced to 45μm. The high-carbon steel busbar used has a diameter of 35μm. However, continued cost reduction is needed, leading to the rapid promotion of ultrafine tungsten wire. Currently, the tungsten busbar used in photovoltaic slicing diamond wire has been reduced to 28μm. The drawing of ultrafine tungsten wire has gradually shifted from hot drawing to cold drawing. Cold-drawing tungsten wire has higher cost and precision, but cold-drawn tungsten wire requires electroplating pretreatment on the 60μm tungsten wire surface to better cold-draw the tungsten wire into a 28μm ultrafine wire. To improve the yield of cold drawing, high coating consistency is required.

[0003] In the prior art, the cathode conductive roller used for electroplating on 60μm tungsten wire raw materials is a multi-wire machine, such as a 16-21 wire machine. This equipment can plate multiple wires at a time with high efficiency and low cost, but multiple wires share one cathode conductive roller. The current enters from both ends of the cathode roller and is distributed to multiple sub-wires through stainless steel conductive rods. Due to the large resistance of stainless steel, there will be differences in the current of different sub-wires, resulting in differences in the plating during joint production, and ultimately leading to differences in the plating between different sub-wires, which has a certain impact on the subsequent cold drawing yield. At the same time, the conductive rod will be worn out after long-term use and needs to be replaced once a month. The conductive rod is tightly inserted into the cathode roller, which is troublesome to disassemble and easily damages the cathode roller sheet. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the existing technology and provide a cathode conductive roller for tungsten wire electroplating, which can greatly improve the electroplating performance of tungsten wire cold-drawn diamond wire busbar, improve the yield of cold drawing, and reduce the production cost of the enterprise.

[0005] In order to achieve the above and other purposes, the present invention provides a cathode conductive roller for tungsten wire electroplating based on the existing technology, and the cathode conductive roller includes:

[0006] A plurality of roller sheets, the roller sheets are stacked in sequence and have a plurality of first through holes distributed along the circumferential direction;

[0007] A plurality of clamping sheets, clamped at both ends of the roller sheet, each clamping sheet having a central hole and a plurality of second through holes distributed along the circumference;

[0008] A plurality of conductive rods respectively pass through the first through hole and the second through hole to connect the plurality of rollers and the plurality of clamping pieces;

[0009] and a shaft assembly passing through the center hole of the clamping piece, the shaft assembly including a main shaft and a first conductive member and a plurality of second conductive members located inside the main shaft, one end of the plurality of second conductive members being connected to the first conductive member, the other end of the plurality of second conductive members extending out of the main shaft, and the plurality of second conductive members being distributed along the length direction of the first conductive member; the cathode conductive roller including a rotating assembly, the rotating assembly including a rotating disk, the rotating disk including a first rotating disk disposed on both sides of the outermost clamping piece and a second rotating disk disposed between the clamping pieces, the first rotating disk being sleeved on both ends of the main shaft, the first rotating disk and the second rotating disk being connected by a connecting rod passing through the clamping piece, the outer peripheral edge of the rotating disk having a plurality of convex teeth and grooves arranged at intervals, the rotational trajectory of the convex teeth covering the first through hole or the second through hole, the rotational trajectory of the grooves not covering the first through hole or the second through hole, the first through hole and the second through hole being special-shaped holes, the special-shaped holes including a first aperture segment and a second aperture segment extending in the radial direction, the aperture of the first aperture segment being larger than the aperture of the second aperture segment.

[0010] In one embodiment, at least one end of the clamping piece is provided with a convex edge on the inner side of the second through hole, and the convex edge is in contact with the inner side wall of the roller piece.

[0011] In one embodiment, the clamping plate has a first waist hole, the first rotating disk has a first connecting hole and a second waist hole, the first waist hole is arranged between the center hole of the clamping plate and the second through hole, the second rotating disk is provided with a second connecting hole, and the connecting rod passes through the first connecting hole, the first waist hole and the second connecting hole.

[0012] In one embodiment, a limiting column that cooperates with the second waist hole is provided on the clamping plate close to the side of the first rotating disk.

[0013] In one embodiment, the inner side wall of the roller where the second rotating disk is located has a limit platform, one side of the second rotating disk is against the limit platform, and the first through hole on the roller where the second rotating disk is located is at least partially connected to the second rotating disk.

[0014] In one embodiment, the first rotating disk and the second rotating disk are connected to the main shaft via a first bearing and a second bearing respectively, and skeleton oil seals are provided on both sides of the second bearing.

[0015] In one embodiment, nuts are sleeved on both ends of the connecting rod and the conductive rod, and the outer diameter of the first rotating disk is smaller than the outer diameters of the roller and the clamping plate.

[0016] The utility model has the following beneficial effects:

[0017] 1. In the prior art, the cathode roller conducts electricity only through the stainless steel conductive rod. The stainless steel has a large resistance, resulting in uneven current distribution to different sub-wires, which in turn leads to uneven coating. The utility model optimizes the conductive path and sets the first conductive member and the second conductive member to make the current distribution of each sub-wire the same, thereby making the coating of different sub-wires more uniform.

[0018] 2. The existing cathode roller conductive rod needs to be inserted into the cathode roller sheet more tightly, otherwise there will be a problem of poor conductivity. However, the disassembly during maintenance is also more troublesome. Pulling it out forcefully may cause damage to the cathode roller sheet. The cathode roller sheet is relatively expensive, which leads to high maintenance costs. The utility model can be loosened by simply rotating the rotating component, and can be easily disassembled, which greatly reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a schematic structural diagram of the cathode conductive roller of the utility model;

[0020] Figure 2 Shown is a cross-sectional view of the cathode conductive roller of the present invention;

[0021] Figure 3 Shown is an exploded schematic diagram of the cathode conductive roller of the present invention;

[0022] Figure 4 Shown is a schematic structural diagram of the clamping piece of the utility model;

[0023] Figure 5 Shown is a schematic structural diagram of the roller sheet of the utility model;

[0024] Figure 6 Shown is a partial detail view of the first rotating disk of the present invention;

[0025] Figure 7 Shown is a front view of the second through hole of the present invention;

[0026] Figure 8 Shown is a schematic structural diagram of the roller at the second rotating disk of the present invention;

[0027] Figure 9 Shown is a schematic structural diagram of the second rotating disk of the present invention;

[0028] Numbers in the figure: 1-roller, 2-clamping piece, 3-conductive rod, 4-axis assembly, 5-rotating assembly, 11-concave ring, 12-first through hole, 13-limiting platform, 21-clamping piece body, 22-convex edge, 21a-clamping piece center hole, 21b-second through hole, 21c-first waist hole, 21d-limiting column, 41-spindle, 41a-inner cavity, 42-first conductive member, 43-second conductive member, 51-first rotating disk, 52-second rotating disk, 53-connecting rod, 54-first bearing, 55-second bearing, 56-skeleton oil seal, 51a-center hole of the first rotating disk, 51b-first connecting hole, 51c-second waist hole, first protruding tooth 51d, first groove 51e, first aperture section 21b1, second aperture section 21b2, 52a-center hole of the second rotating disk, 52b-second connecting hole, 52c-second protruding tooth, 52d-second groove. DETAILED DESCRIPTION

[0029] The following describes the implementation of the present invention through specific examples.

[0030] like Figure 1 As shown, the utility model provides a cathode conductive roller for tungsten wire electroplating, wherein the conductive roller includes a plurality of roller sheets 1, which are stacked in sequence. The diamond wire busbar to be electroplated can be wound on the roller sheet 1. As the conductive roller rotates, the conductive treatment is performed and the roller sheet 1 is transported to the subsequent electroplating process. The roller sheet 1 can be made of a polymer material.

[0031] like Figure 5 As shown, the roller sheet 1 can be an annular structure, with multiple layers of concave rings 11 on the outer circumferential wall of the roller sheet 1, and multiple first through holes 12 along the circumferential direction on the ring body of the roller sheet 1, and the first through holes 12 are connected to the concave rings 11.

[0032] like Figure 3 and Figure 4 As shown, the cathode conductive roller includes multiple clamping plates 2, each comprising a clamping plate body 21 and a flange 22 disposed at at least one end of the clamping plate body 21. When the flange 22 is provided on both sides, the flanges 22 on both sides can have the same or different diameters to accommodate the different thicknesses of the roller plates 1 on both sides. The clamping plate body 21 has a clamping plate center hole 21a. The clamping plate body 21 includes an inner ring area and an outer ring area, which are separated by the flange 22. The clamping plate body 21 has multiple second through holes 21b disposed along the outer circumference of the outer ring area. The clamping plates 2 are made of metal. The multiple clamping plates 2 can clamp the ends of the multiple roller plates 1, respectively.

[0033] like Figure 3As shown, the inner ring area is further provided with a first waist hole 21c, and the first waist hole 21c can be located outside the central hole 21a of the clamping piece.

[0034] like Figure 2 As shown, the cathode conductive roller includes a conductive rod 3 that can pass through the roller sheet 1 and the clamping plate 2. During assembly, the roller sheet 1 can be clamped sequentially using the clamping plate 2, and then the conductive rod 3 is passed through the first through-hole 12 and the second through-hole 21b to connect the clamping plate 2 and the roller sheet 1. During assembly, the cathode conductive roller can be clamped and sealed at both ends using the clamping plate 2. The roller sheet 1 and the clamping plate 2 can be coaxially arranged, with the same outer diameter. Nuts are fitted on both ends of the conductive rod 3 that pass through the second through-hole 21b.

[0035] like Figure 1 and Figure 2 As shown, the cathode conductive roller includes a shaft assembly 4, and the shaft assembly 4 includes a main shaft 41. The main shaft 41 has an inner cavity 41a, and the main shaft 41 can pass through the central hole 21a of the clamping piece.

[0036] like Figure 2 As shown, the shaft assembly 4 includes a first conductive member 42 and a second conductive member 43. The first conductive member 42 passes through the inner cavity 41a of the main shaft 41. The diameter of the first conductive member 42 is smaller than that of the inner cavity 41a. The second conductive member 43 is disposed in the inner cavity 41a and arranged along the length of the first conductive member 42. One end of the second conductive member 43 is threadedly connected to the first conductive member 42, and the other end of the second conductive member 43 extends from the main shaft 41. The second conductive member 43 can be located between two adjacent clamping pieces 2. The first conductive member 42 and the second conductive member 43 can both be made of copper, such as red copper. Red copper has a low electrical resistance, which allows the conductive rods 3 at different positions to receive a relatively uniform current.

[0037] like Figure 2 As shown, the outer side wall of the main shaft 41 and the central hole 21a of the clamping piece can be connected by a key.

[0038] In some embodiments, in order to facilitate better replacement and disassembly of the conductive rod 3, the cathode conductive roller includes a rotating assembly 5, the rotating assembly 5 includes a rotating disk, and the rotating disk includes two first rotating disks 51. The first rotating disks 51 are connected to the outside of the clamping plates 2 at the outermost ends on both sides and are sleeved on both ends of the main shaft 41 through the center hole 51a of the first rotating disk.

[0039] like Figure 3As shown, the clamping piece 2 at the outermost end is further provided with a limiting column 21d in the inner ring area, and the outer circumferential edge of the first rotating disk 51 has a first protruding tooth 51d and a first groove 51e arranged in sequence, and the first rotating disk 51 has a second waist hole 51c matching the limiting column 21d. The second waist hole 51c facilitates the rotation of the rotating disk and also enables the first groove 51e and the first protruding tooth 51d to rotate to a suitable position. The first rotating disk 51 is also provided with a first connecting hole 51b between adjacent second waist holes 51c.

[0040] like Figure 6 As shown, the rotation track of the first groove 51e does not cover the second through hole 21b, and the rotation track of the first protruding tooth 51d covers the second through hole 21b.

[0041] like Figure 7 As shown, the first through hole 12 and the second through hole 21b are irregularly shaped holes. The first through hole 12 and the second through hole 21b can be identical in shape and size. Taking the second through hole 21b as an example, the second through hole 21b includes a first aperture section 21b1 and a second aperture section 21b2 that vary in diameter along the radial direction. The aperture of the first aperture section 21b1 is larger than the aperture of the second aperture section 21b2. The outer diameter of the conductive rod 3 can be slightly smaller than the aperture of the second aperture section 21b2, while the outer diameter of the conductive rod 3 is significantly smaller than the aperture of the first aperture section 21b1. The outer diameter of the first rotating disk 51 is smaller than the outer diameters of the roller 1 and the clamping plate 2.

[0042] like Figure 2 and Figure 9 As shown, the rotating assembly 5 includes a second rotating disk 52 and a connecting rod 53. The second rotating disk 52 can be located between adjacent clamping plates 2. The second rotating disk 52 has a similar structure to the first rotating disk 51. The second rotating disk 52 can be mounted on the main shaft 41 through the center hole 52a of the second rotating disk.

[0043] like Figure 9 As shown, the outer peripheral edge of the second rotating disk 52 is provided with a second protruding tooth 52c and a second groove 52d. The disk surface is also provided with a second connecting hole 52b that matches the first connecting hole 51b. The connecting rod 53 passes through the first connecting hole 51b and exits at the second connecting hole 52b. The width of the first waist hole 21c is greater than the diameter of the connecting rod 53.

[0044] like Figure 2 As shown, the outer diameter of the second rotating disk 52 is greater than the outer diameter of the first rotating disk 51 .

[0045] like Figure 2 and Figure 3As shown, the connecting rod 53 may include 4 connecting rods 53, and the connecting rod 53 connects the first rotating disk 51 and the second rotating disk 52. The connecting rod 53 passes through the first connecting hole 51b and the first waist hole 21c on the multiple clamping plates 2 in sequence, and finally passes through the second connecting hole 52b. Nuts can be installed at both ends of the connecting rod 53 to stabilize it.

[0046] like Figure 6 and Figure 7 As shown, the first rotating disk 51 is rotated by applying force at the second waist hole 51c with a hook wrench, thereby driving the second rotating disk 52 to rotate. When the first protruding tooth 51d is close to the conductive rod 3, the conductive rod 3 can be placed on the second aperture section 21b2, and then contacted with the top of the roller 1 to achieve effective electrical connection. When the first groove 51e is close to the conductive rod 3, the conductive rod 3 retreats to the first aperture section 21b1, and the conductive rod 3 can be easily removed without scratching the roller 1, thereby reducing the replacement rate of the roller 1 and reducing the production cost of the enterprise.

[0047] like Figure 8 As shown, in one embodiment, the inner wall of the roller sheet 1 where the second rotating disk 52 is located has a limit platform 13, and one side of the second rotating disk 52 can be abutted against the limit platform 13. Furthermore, the first through hole 12 on the roller sheet 1 at the second rotating disk 52 is at least partially not closed to the inner cavity of the roller sheet 1, that is, the first through hole 12 here can remain connected to the second rotating disk 52, so as to ensure that the second protruding tooth 52c of the second rotating disk 52 can be in contact with the conductive rod 3 during the rotation process, so that the first rotating disk 51 and the second rotating disk 52 can rotate at the same time, and lift or lower the conductive rod 3 together, thereby enhancing the reliability of the rotating component 5.

[0048] like Figure 2 As shown, the first rotating disk 51 and the second rotating disk 52 can be connected to the main shaft 41 through a first bearing 54 and a second bearing 55 , and skeleton oil seals 56 can be further provided on both sides of the second bearing 55 .

[0049] Therefore, the present invention effectively overcomes the shortcomings of the prior art and possesses high industrial value. The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by persons skilled in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A cathode conductive roller for tungsten wire electroplating, characterized in that: The cathode conductive roller includes: A plurality of roller sheets, the roller sheets are stacked in sequence and have a plurality of first through holes distributed along the circumferential direction; A plurality of clamping sheets, clamped at both ends of the roller sheet, each clamping sheet having a central hole and a plurality of second through holes distributed along the circumference; A plurality of conductive rods respectively pass through the first through hole and the second through hole to connect the plurality of rollers and the plurality of clamping pieces; and a shaft assembly passing through the center hole of the clamping piece, the shaft assembly including a main shaft and a first conductive member and a plurality of second conductive members located inside the main shaft, one end of the plurality of second conductive members being connected to the first conductive member, the other end of the plurality of second conductive members extending out of the main shaft, and the plurality of second conductive members being distributed along the length direction of the first conductive member; the cathode conductive roller including a rotating assembly, the rotating assembly including a rotating disk, the rotating disk including a first rotating disk disposed on both sides of the outermost clamping piece and a second rotating disk disposed between the clamping pieces, the first rotating disk being sleeved on both ends of the main shaft, the first rotating disk and the second rotating disk being connected by a connecting rod passing through the clamping piece, the outer peripheral edge of the rotating disk having a plurality of convex teeth and grooves arranged at intervals, the rotational trajectory of the convex teeth covering the first through hole or the second through hole, the rotational trajectory of the grooves not covering the first through hole or the second through hole, the first through hole and the second through hole being special-shaped holes, the special-shaped holes including a first aperture segment and a second aperture segment extending in the radial direction, the aperture of the first aperture segment being larger than the aperture of the second aperture segment.

2. The cathode conductive roller according to claim 1, characterized in that: At least one end of the clamping piece is provided with a convex edge on the inner side of the second through hole, and the convex edge is in contact with the inner side wall of the roller piece.

3. The cathode conductive roller according to claim 1, wherein: The clamping plate has a first waist hole, the first rotating disk has a first connecting hole and a second waist hole, the first waist hole is arranged between the center hole of the clamping plate and the second through hole, the second rotating disk is provided with a second connecting hole, and the connecting rod passes through the first connecting hole, the first waist hole and the second connecting hole.

4. The cathode conductive roller according to claim 3, characterized in that: A limiting column matched with the second waist hole is provided on the clamping plate close to the first rotating disk.

5. The cathode conductive roller according to claim 1, characterized in that: The inner side wall of the roller where the second rotating disk is located has a limit platform, one side of the second rotating disk is against the limit platform, and the first through hole on the roller where the second rotating disk is located is at least partially connected to the second rotating disk.

6. The cathode conductive roller according to claim 1, characterized in that: The first rotating disk and the second rotating disk are connected to the main shaft via a first bearing and a second bearing respectively, and skeleton oil seals are provided on both sides of the second bearing.

7. The cathode conductive roller according to claim 1, characterized in that: Both ends of the connecting rod and the conductive rod are sleeved with nuts, and the outer diameter of the first rotating disk is smaller than the outer diameters of the roller piece and the clamping piece.

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