Continuous preparation process and device for copper-clad aluminum photovoltaic welding strip

Abstract

The invention relates to the technical field of copper-clad aluminum photovoltaic welding strip processing, in particular to a continuous preparation process and device for a copper-clad aluminum photovoltaic welding strip, and the device specifically comprises a chain plate conveying table, the top of the chain plate conveying table is fixedly connected with a mounting seat, and the mounting seat is provided with an aluminum wire indentation assembly and a copper strip indentation assembly which are in linkage fit; an aluminum wire indentation assembly is combined with a copper strip indentation assembly, continuous extrusion of concave-convex traces on the surfaces of aluminum wires and copper strips is achieved, the contact area between the aluminum wires and the copper strips is increased, a tight wrapping structure is formed for subsequent connection between the copper strips and the aluminum wires, and the conductivity of the copper-clad aluminum photovoltaic welding strip is remarkably improved; and before wrapping, scraping of an oxide layer and impurities on the surface of the aluminum wire, scrap cleaning and straightening treatment of the aluminum wire are realized, so that the layering risk of a copper-aluminum interface is avoided, the conductive efficiency is further improved, and the transmission loss of energy is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of copper-clad aluminum photovoltaic welding strip processing, and particularly relates to a continuous preparation process and device of a copper-clad aluminum photovoltaic welding strip. BACKGROUND

[0002] The copper-clad aluminum photovoltaic welding strip is a key material for connecting photovoltaic modules, is taken as an aluminum wire as a core substrate, and uniformly clads a copper layer on the surface through a special process. The structure not only utilizes the advantages of light weight and low cost of the aluminum wire, but also utilizes the good conductivity of the copper layer to guarantee the current transmission efficiency. In the photovoltaic module, the copper-clad aluminum photovoltaic welding strip is used for connecting the cell pieces to collect and output the current generated by the cell pieces.

[0003] As in the prior art, the patent with the publication number CN113427099A relates to a production device of a photovoltaic welding strip for an expanded rotary solar module, which is prepared by inserting an aluminum rod into a copper sleeve. Although the insertion of the aluminum rod is assisted by the expansion of the copper sleeve port, the smooth surface cladding between copper and aluminum is difficult to further improve the connection strength between the two, and there is a lack of structure for effectively removing the oxide layer and impurities on the surface of the aluminum rod with insulation properties, which leads to the synchronous cladding of the insulation substances into the copper sleeve, further aggravates the delamination risk of the copper-aluminum interface, significantly increases the contact resistance of the copper-aluminum interface, causes the specific resistance to be large, increases the energy loss in the photovoltaic module power generation process, and reduces the overall power generation efficiency.

[0004] Therefore, a solution is proposed. SUMMARY

[0005] The purpose of the present application is to provide a continuous preparation process and device of a copper-clad aluminum photovoltaic welding strip, which improves the stability and reliability of the connection by designing the concave-convex marks on the surface of the aluminum wire and the copper strip, helps the efficient operation of the photovoltaic system, and solves the above technical defects.

[0006] The purpose of the present application can be achieved by the following technical solution: a continuous preparation device of a copper-clad aluminum photovoltaic welding strip, comprising a chain plate conveying table, and a mounting seat is fixedly connected to the top of the chain plate conveying table, and an aluminum wire indentation assembly and a copper strip indentation assembly are arranged on the mounting seat in linkage cooperation;

[0007] The aluminum wire indentation assembly comprises a rotating cylinder rotatably installed on the mounting seat, a plurality of movable plates one for clamping and straightening the aluminum wire are arranged in a ring array in the interior of the rotating cylinder, and a movable plate two is arranged, a plurality of rolling balls are embedded on the movable plate one in rolling, a plurality of indentation protrusions for extruding concave-convex marks on the annular surface of the aluminum strip are installed on the movable plate two, the copper strip indentation assembly comprises two groups of pressing plates alternately moving in opposite directions and cooperating with the chain plate conveying table, and a pressing strip for extruding concave-convex marks on the surface of the copper strip is fixedly connected to the bottom of the pressing plate.

[0008] Preferably, a plurality of telescopic rods are fixedly connected between the movable plate one, the movable plate two and the rotating cylinder, and a tension spring is fixedly connected outside the telescopic rods, and two sides of the rotating cylinder are symmetrically and slidably connected with adjusting seats for adjusting the positions of the movable plate one and the movable plate two.

[0009] Preferably, one side of the adjusting seat is provided with an inclined surface for sliding with the end portions of the movable plate one and the movable plate two, a plurality of limiting blocks are fixedly connected to the annular outer wall of the adjusting seat, a limiting groove is formed in the inner wall of the rotating cylinder, and a bidirectional screw rod is threadedly connected to the adjusting seat and rotatably connected to the rotating cylinder.

[0010] Preferably, an auxiliary ring is fixedly connected to one side of the rotating cylinder, a plurality of first elastic sheets are equidistantly fixedly connected to the inner wall of the auxiliary ring, a plurality of scrapers are fixedly connected to the first elastic sheets, a plurality of second elastic sheets are fixedly connected to one side of the adjusting seat, and cleaning brushes are fixedly connected to the second elastic sheets.

[0011] Preferably, a gear ring is fixedly connected to the rotating cylinder, a motor is boltedly mounted to the mounting seat, and a gear meshing with the gear ring is fixedly connected to the output shaft of the motor.

[0012] Preferably, slide seats are symmetrically and slidably connected to two sides of the mounting seat, supports fixedly connected with corresponding pressing plates are slidably connected to the slide seats, spring telescopic pins are fixedly connected to the supports, quadrangular guide grooves slidably connected with corresponding spring telescopic pins are formed in the mounting seat, and limiting protrusions are alternately mounted on the upper and lower sides of the two sides of the quadrangular guide grooves.

[0013] Preferably, a support plate is fixedly connected to the slide seat, and a guide pin is fixedly connected to the support plate, and a cam groove slidably connected with the guide pin is formed in the annular outer wall of the rotating cylinder.

[0014] Preferably, a fixed frame is fixedly connected to one side of the chain plate conveying table, a group of mutually matched pressing wheels and material supporting deformation wheels are rotatably connected to one side in the fixed frame, and a plurality of groups of mutually matched left extruding wheels and right extruding wheels are rotatably connected to the other side in the fixed frame.

[0015] Preferably, copper belt guide rollers are mounted on the opposite sides of the chain plate conveying table and the fixed frame, a drawing die is fixedly mounted on the side of the fixed frame away from the copper belt guide rollers, and an auxiliary notch is formed in the top side in the drawing die.

[0016] The application further provides a continuous preparation process of the copper-clad aluminum photovoltaic welding strip.

[0017] S1: aluminum wire surface indentation: multiple movable plates one moves to center and clamp the aluminum wire, the indentation protrusions on the movable plate two extrude the annular outer wall of the aluminum wire, combined with the rotation of the rotating cylinder and the horizontal conveying of the aluminum wire, the spiral concave-convex marks are extruded on the surface of the aluminum wire;

[0018] S2: aluminum wire cleaning and straightening: multiple movable plates one extrusion clamps the aluminum wire for straightening treatment, the auxiliary ring and the adjusting seat rotate, driving the first and second elastic sheets to rotate circumferentially, the scraper removes the oxide layer on the surface of the aluminum wire, and the cleaning brush cleans the surface debris;

[0019] S3: copper strip surface indentation: the rotating cylinder drives two groups of slides to slide synchronously and reversely, and then the quadrilateral guide groove promotes the bracket to carry the corresponding pressing plate to reciprocate, and the chain plate conveying table continuously extrudes the inclined concave-convex marks on the surface of the copper strip;

[0020] S4: continuous preparation of copper-clad aluminum welding strip: the pressing wheel and the material supporting deformation wheel make the copper wire and the copper strip contact, and the copper strip semi-wraps the aluminum wire, then a plurality of left and right extrusion wheels make the copper strip fully wrap the aluminum wire, and the concave-convex marks on the copper strip and the aluminum wire are processed to be engaged with each other, and then the drawing die is used for secondary strengthening extrusion treatment.

[0021] The beneficial effects of the present application are as follows:

[0022] (1) first, the rotating cylinder drives the indentation protrusions to rotate, and cooperates with the horizontal conveying of the aluminum wire to extrude the spiral concave-convex marks on the surface of the aluminum wire, then the rotating cylinder drives two groups of pressing plates to alternately and reversely move, and cooperates with the chain plate conveying table to continuously extrude the inclined concave-convex marks on the surface of the copper strip which match the spiral concave-convex marks, and then the pressing wheel, the material supporting deformation wheel, the extrusion wheel and the drawing die are cooperated to not only increase the contact area between the aluminum wire and the copper strip, but also form a tight wrapping structure between the copper strip and the aluminum wire for subsequent connection, which significantly improves the conductivity of the copper-clad aluminum photovoltaic welding strip;

[0023] In addition, through the auxiliary notch on the drawing die, in the secondary strengthening extrusion process, the copper strip cladding area and the aluminum wire are first fully extruded and fitted, and then the copper strip butt joint is extruded and fitted, which is a step-by-step strengthening extrusion method, compared with the whole omnidirectional extrusion method, it can avoid the problem of existing layered gap due to the interference of extrusion concave-convex marks between the copper strip and the aluminum wire, thereby reducing the preparation quality of the copper-clad aluminum photovoltaic welding strip;

[0024] (2) In addition, the rotation of the rotating cylinder can drive the elastic sheet and the scraper and the cleaning brush to rotate, remove the oxide layer and impurities on the surface of the aluminum wire, and clean the debris, prevent the debris from being wrapped into the copper belt, avoid the delamination risk of the copper-aluminum interface, improve the conductivity efficiency, reduce the transmission loss of energy, and realize the straightening treatment of the aluminum wire with the assistance of multiple movable plates and balls, and further ensure the effective clamping treatment of the spiral concave and convex marks of the aluminum wire and the oblique concave and convex marks of the copper belt. BRIEF DESCRIPTION OF DRAWINGS

[0025] The application will be further described below with reference to the drawings;

[0026] Figure 1 is a structural schematic diagram of the application;

[0027] Figure 2 is a structural schematic diagram of the fixed frame of the application;

[0028] Figure 3 is a structural schematic diagram of the drawing die of the application;

[0029] Figure 4 is a cooperation schematic diagram of the aluminum wire indentation assembly and the copper belt indentation die of the application;

[0030] Figure 5 is a structural schematic diagram of the aluminum wire indentation assembly of the application;

[0031] Figure 6 is a structural schematic diagram of the rotating cylinder of the application;

[0032] Figure 7 is a structural schematic diagram of the adjusting seat of the application;

[0033] Figure 8 is a structural schematic diagram of the auxiliary ring of the application;

[0034] Figure 9 is a split schematic diagram of the mounting seat and the copper belt indentation assembly of the application;

[0035] Figure 10 is a structural schematic diagram of the mounting seat of the application.

[0036] LEGEND:

[0037] 1, chain plate conveying table; 11, mounting seat; 12, quadrilateral guide groove; 13, limiting protrusion; 14, fixed frame; 15, pressing wheel; 16, material supporting deformation wheel; 17, left extrusion wheel; 18, right extrusion wheel; 19, drawing die; 110, auxiliary notch;

[0038] 2, aluminum wire indentation assembly; 21, rotating cylinder; 22, movable plate one; 23, movable plate two; 24, ball; 25, indentation convex; 26, tension spring; 27, adjusting seat; 28, inclined surface; 29, bidirectional screw; 210, auxiliary ring; 211, first elastic sheet; 212, scraper; 213, second elastic sheet; 214, cleaning brush; 215, cam groove;

[0039] 3, copper strip indentation assembly; 31, pressure plate; 32, indentation strip; 33, sliding seat; 34, support; 35, spring telescopic pin; 36, support plate; 37, guide pin. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] Embodiment one: please refer to Figures 1-7 、 Figure 9 and Figure 10 As shown, in the prior art, the smooth surface of copper and aluminum is overlapped to prepare, which is difficult to further improve the connection strength between the two, and the surface of the aluminum wire has an insulating oxide layer, which increases the overall resistivity of the photovoltaic welding strip. The following scheme can be used to solve the problem;

[0042] A continuous preparation device for copper-clad aluminum photovoltaic welding strip in the embodiment includes a chain plate conveying table 1 for assisting the conveying of the copper strip, and the top of the chain plate conveying table 1 is fixedly connected with a mounting seat 11, and the mounting seat 11 is provided with an aluminum wire indentation assembly 2 and a copper strip indentation assembly 3 in linkage cooperation;

[0043] The aluminum wire indentation assembly 2 includes a rotating cylinder 21 rotatably installed on the mounting seat 11, and the rotating cylinder 21 is provided with a plurality of movable plates one 22 arranged in a ring array inside for clamping and straightening the aluminum wire, and a movable plate two 23 is arranged, a plurality of balls 24 are rollingly embedded on the movable plate one 22, and a plurality of indentation convexes 25 for extruding concave-convex marks on the ring surface of the aluminum strip are installed on the movable plate two 23;

[0044] Through the relative movement of the movable plate one 22 and the movable plate two 23, the ball 24 contacts the aluminum wire with the indentation convex 25, the indentation convex 25 extrudes the annular outer wall of the aluminum wire to form the concave-convex indentation, the rotating cylinder 21 rotates, and the horizontal conveying of the aluminum wire is combined to extrude the spiral concave-convex indentation on the surface of the aluminum wire.

[0045] The copper strip is arranged between the chain plate conveying table 1 and the pressing plate 31, the pressing plate 31 moves downward and synchronously with the copper strip, the indentation strip 32 on the pressing plate 31 extrudes the oblique concave-convex indentation on the surface of the copper strip, the copper strip fully wraps the aluminum wire, and the copper strip and the aluminum wire are mutually clamped by the concave-convex indentation, which not only increases the contact area between the aluminum wire and the copper strip, but also forms a tight wrapping structure between the copper strip and the aluminum wire, thereby significantly improving the conductivity of the copper-clad aluminum photovoltaic welding strip.

[0046] The movable plate one 22 and the movable plate two 23 and the rotating cylinder 21 are fixedly connected with a plurality of telescopic rods for realizing the limited movement of the movable plate one 22 and the movable plate two 23, and a tension spring 26 fixedly connected outside the telescopic rod for realizing the reset processing of the movable plate one 22 and the movable plate two 23.

[0047] The adjusting seat 27 is slidably connected to the end of the movable plate one 22 and the movable plate two 23 through the oblique surface 28, and a plurality of limiting blocks are fixedly connected to the annular outer wall of the adjusting seat 27, and a limiting groove is formed in the inner wall of the rotating cylinder 21, the limiting block and the corresponding limiting groove are slidably connected, and the rotating cylinder 21 is limited in the rotating cylinder 21, and the installation stability of the adjusting seat 27 is improved.

[0048] The rotating cylinder 21 is rotatably connected with the bidirectional screw rod 29 which is threadedly connected with the adjusting seat 27, the end of the bidirectional screw rod 29 is provided with a torsion wheel, the bidirectional screw rod 29 drives the two adjusting seats 27 to move relatively to extrude the movable plate one 22 and the movable plate two 23, and the oblique surface 28 on the adjusting seat 27 promotes the movable plate one 22 and the movable plate two 23 to move close to the aluminum wire by stretching the tension spring 26.

[0049] The rotating cylinder 21 is fixedly connected with a gear ring, the motor is installed on the mounting seat 11 through bolts, and the output shaft of the motor is fixedly connected with a gear which is engaged with the gear ring, the output shaft of the motor rotates, and the gear and the gear ring are engaged to drive the rotating cylinder 21 to rotate.

[0050] Two sides of the mounting seat 11 are symmetrically and slidably connected with sliding seats 33, and the sliding seats 33 are slidably connected with supports 34 fixedly connected with corresponding pressing plates 31, the supports 34 are fixedly connected with spring telescopic pins 35, and the mounting seat 11 is provided with quadrilateral guide grooves 12 slidably connected with the spring telescopic pins 35, and the two sides of the quadrilateral guide grooves 12 are alternately provided with limiting protrusions 13 from top to bottom;

[0051] When the sliding seats 33 carrying the supports 34 and the pressing plates 31 move towards the fixed frame 14, the spring telescopic pins 35 on the supports 34 slide in the lower horizontal sections of the quadrilateral guide grooves 12, and the chain plate conveying table 1 is used for synchronous movement of the copper strip through extrusion, in the process, the indentation strips 32 on the pressing plates 31 extrude the oblique concave-convex marks on the surface of the copper strip, and then the spring telescopic pins 35 enter the right inclined sections of the quadrilateral guide grooves 12 to perform the lifting movement of the pressing plates 31, which is used for reverse anti-interference reset movement;

[0052] When the sliding seats 33 move reversely, the spring telescopic pins 35 slide in the upper horizontal sections of the quadrilateral guide grooves 12 under the limitation of the right limiting protrusions 13, the pressing plates 31 move reversely, and in the process, the spring telescopic pins 35 on the other pressing plates 31 slide in the lower horizontal sections of the quadrilateral guide grooves 12, so as to perform the reverse anti-interference movement, and the continuous extrusion of the oblique concave-convex marks on the surface of the copper strip is performed, when the pressing plates 31 move to the left side, the spring telescopic pins 35 enter the left inclined sections of the quadrilateral guide grooves 12 to perform the descending movement of the pressing plates 31, and the above movement is repeated in combination with the left limiting protrusions 13, so as to realize the continuous extrusion of the oblique concave-convex marks.

[0053] The sliding seats 33 are fixedly connected with supporting plates 36, and the supporting plates 36 are fixedly connected with guide pins 37, and the annular outer wall of the rotating cylinder 21 is provided with cam grooves 215 slidably connected with the guide pins 37, the guide pins 37 are guided by the rotation of the rotating cylinder 21 in combination with the cam grooves 215, so as to make the two groups of supporting plates 36 carrying the corresponding sliding seats 33 move synchronously and reversely, and then make the two groups of pressing plates 31 move synchronously and reversely.

[0054] One side of the chain plate conveying table 1 is fixedly connected with the fixed frame 14, and one side in the fixed frame 14 is rotatably connected with a group of mutually matched pressing wheels 15 and material supporting deformation wheels 16, the copper strip and the aluminum wire are jointly arranged between the pressing wheels 15 and the material supporting deformation wheels 16, and the aluminum wire and the copper strip are pressed into the grooves on the material supporting deformation wheels 16 under the extrusion of the pressing wheels 15, so as to make the copper strip preliminarily deformed to half-wrapped aluminum wire;

[0055] Another side in the fixed frame 14 is rotatably connected with a plurality of groups of left extrusion wheel 17 and right extrusion wheel 18, the spacing between a plurality of groups of left extrusion wheel 17 and right extrusion wheel 18 gradually decreases from the fixed frame 14 on the side of the material pressing wheel 15 to the other side, thereby performing step-by-step wrapping treatment on the copper strip and the aluminum wire, improving the wrapping tightness, and the semi-wrapped copper strip and aluminum wire are extruded by a plurality of groups of left extrusion wheel 17 and right extrusion wheel 18, so that the copper strip gradually and comprehensively wraps the aluminum wire, and the concave-convex marks on the copper strip and the aluminum wire are mutually engaged, so that a tight wrapping structure is formed between the copper strip and the aluminum wire.

[0056] The opposite side of the chain plate conveying table 1 and the fixed frame 14 is provided with a copper strip guide roller for guiding the copper strip, and the side of the fixed frame 14 away from the copper strip guide roller is fixedly provided with a drawing die 19, and the fully wrapped copper-clad aluminum is arranged in the drawing die 19 for secondary strengthening extrusion wrapping treatment, and an auxiliary notch 110 is formed in the top side of the drawing die 19;

[0057] In the drawing and extrusion process, the copper strip edge joint is located in the auxiliary notch 110 inside the drawing die 19, the aluminum wire and the copper strip are fully adhered by the inner wall of the drawing die 19, and then the copper strip joint is adhered and extruded, the continuous preparation of the copper-clad aluminum photovoltaic welding strip is carried out by continuous conveying of the aluminum wire and the copper strip, and the step-by-step strengthening extrusion method is adopted, compared with the overall omnidirectional extrusion method, the relative sliding between the copper strip and the aluminum wire caused by the extrusion concave-convex marks can be avoided, thereby avoiding the problem of layered gap, and the preparation quality of the copper-clad aluminum photovoltaic welding strip is reduced.

[0058] Embodiment two: please refer to Figures 4-8 As shown, only by pressing the mark, it is difficult to remove the oxide layer and impurities, and the resistivity cannot be reduced to the maximum extent, and the aluminum wire cannot be fully extruded and adhered with the copper strip. The problem can be solved by the following scheme;

[0059] The aluminum wire indentation assembly 2 in the embodiment includes a rotating cylinder 21 rotatably installed on a mounting seat 11, and a plurality of movable plates one 22 arranged in a ring array for clamping and straightening the aluminum wire are arranged in the interior of the rotating cylinder 21, and a group of movable plates two 23 are arranged, and a plurality of rolling balls 24 are rolling embedded on the movable plates one 22;

[0060] The relative movement of the two groups of adjusting seats 27, in combination with the inclined surface 28 on the adjusting seat 27, causes the relative movement of the plurality of movable plates 22, in combination with the plurality of balls 24 and the movable plate 22 following the rotation of the rotating cylinder 21, to synchronize the straightening process of the horizontally conveyed aluminum wire, further ensuring the effective mutual engagement process of the spiral concave and convex marks on the aluminum wire and the inclined concave and convex marks on the copper belt, the plurality of balls 24 clamping and centering the aluminum wire, and the movable plate 22 being provided with a plurality of indentation protrusions 25 for extruding the concave and convex marks on the annular surface of the aluminum strip.

[0061] The rotating cylinder 21 is fixedly connected with an auxiliary ring 210 on one side, and a plurality of first elastic sheets 211 are fixedly connected to the inner wall of the auxiliary ring 210 at equal intervals, and a plurality of scrapers 212 are fixedly connected to the first elastic sheets 211, and a plurality of second elastic sheets 213 are fixedly connected to one side of the adjusting seat 27, and cleaning brushes 214 are fixedly connected to the second elastic sheets 213;

[0062] The first elastic sheets 211 and the second elastic sheets 213 are provided, so that the scrapers 212 and the cleaning brushes 214 can be self-adapted to the aluminum wire to remove the oxidation layer and impurities, the aluminum wire is threaded through the auxiliary ring 210, the scrapers 212 on the plurality of first elastic sheets 211 in the auxiliary ring 210 are in contact with the surface of the aluminum wire, and the rotation of the rotating cylinder 21 carries the auxiliary ring 210 and the adjusting seat 27;

[0063] The scrapers 212 scrape off the oxidation layer and impurities on the surface of the aluminum wire, the cleaning brushes 214 on the second elastic sheets 213 clean the surface of the aluminum wire, so as to avoid synchronously wrapping the debris into the copper belt, and a receiving hopper (not shown in the figure) is arranged below the rotating cylinder 21 on one side of the mounting seat 11, for collecting and processing the scraped aluminum oxide debris, so as to avoid the debris falling on the surface of the copper belt.

[0064] Embodiment three: please refer to Figures 1-10 As shown in the figure, the application also provides a continuous preparation process of the copper-clad aluminum photovoltaic welding strip, which comprises the following steps:

[0065] Step one: aluminum wire surface indentation, comprising the following process: the aluminum wire is sequentially threaded through the rotating cylinder 21, between the material pressing wheel 15 and the material supporting deformation wheel 16, between the left extruding wheel 17 and the right extruding wheel 18, and in the drawing die 19, the relative movement of the two groups of adjusting seats 27 is driven by the rotating bidirectional screw 29 to extrude the movable plate 22 and the movable plate 23, in combination with the inclined surface 28 on the adjusting seat 27, to cause the movable plate 22 and the movable plate 23 to move close to the aluminum wire by stretching the tension spring 26, the plurality of balls 24 clamping and centering the aluminum wire, the indentation protrusions 25 extruding the annular outer wall of the aluminum wire to form the concave and convex marks, the motor output shaft rotating, the rotating cylinder 21 rotating through the meshing gear and the gear ring, in combination with the horizontal conveying of the aluminum wire, to extrude the spiral concave and convex marks on the surface of the aluminum wire;

[0066] Step two: aluminum wire cleaning and straightening, including the following processes: the relative movement of the plurality of movable plates 22, combined with the plurality of balls 24 and the movable plate 22 following the rotation of the rotating cylinder 21, the synchronous straightening process of the horizontally transported aluminum wire, the aluminum wire is first threaded through the auxiliary ring 210 before being threaded through the rotating cylinder 21, the scrapers 212 on the plurality of first elastic sheets 211 in the auxiliary ring 210 contact the surface of the aluminum wire, and the rotating cylinder 21 carries the auxiliary ring 210 and the rotating of the adjusting seat 27, the scrapers 212 remove the oxide layer and impurities on the surface of the aluminum wire, the cleaning brushes 214 on the second elastic sheets 213 clean the surface of the aluminum wire, avoiding wrapping the debris into the copper strip;

[0067] Step three: copper strip surface indentation, including the following processes: the copper strip is threaded between the chain plate conveying table 1 and the pressing plate 31, the rotating of the rotating cylinder 21 combined with the cam groove 215 guides the guide pin 37, causes the two sets of support plates 36 to carry the corresponding slide blocks 33 to move synchronously and reversely, and then causes the two sets of pressing plates 31 to move synchronously and reversely;

[0068] When the pressing plate 31 moves towards the fixed frame 14, the spring telescopic pin 35 on the support 34 slides in the lower horizontal section of the quadrilateral guide groove 12, cooperates with the chain plate conveying table 1 to extrude the copper strip to move synchronously, the indentation strip 32 on the pressing plate 31 extrudes the copper strip surface to form oblique concave-convex marks, then the spring telescopic pin 35 enters the right oblique section of the quadrilateral guide groove 12 to lift the pressing plate 31, under the guidance of the cam groove 215 to the guide pin 37, causes the slide block 33 to move reversely, the spring telescopic pin 35 slides in the upper horizontal section of the quadrilateral guide groove 12, avoids interference with the reverse movement of the other pressing plate 31, the other pressing plate 31 repeatedly performs the pressing process of the copper strip, and then continuously extrudes the oblique concave-convex marks;

[0069] Step four: continuous preparation of copper-clad aluminum welding strip, including the following processes: after the copper strip surface indentation, guided by the two sets of copper strip guide rollers, threaded between the copper wire and the material supporting deformation wheel 16, between the left extrusion wheel 17 and the right extrusion wheel 18, and in the drawing die 19, under the extrusion of the pressing wheel 15, the aluminum wire and the copper strip are pressed into the groove on the material supporting deformation wheel 16, causing the copper strip to preliminarily deform and partially wrap the aluminum wire, then through the plurality of left extrusion wheels 17 and right extrusion wheels 18, the copper strip is extruded to fully wrap the aluminum wire, and the concave-convex marks on the copper strip and the aluminum wire are processed to be mutually engaged;

[0070] After being subjected to secondary strengthening extrusion wrapping treatment by the drawing die 19, and during the drawing extrusion, the copper strip butt joint is located in the auxiliary notch 110 inside the drawing die 19, the aluminum wire and the copper strip are fully adhered by the other areas of the inner wall of the drawing die 19, then the copper strip butt joint is adhered and extruded, and through the continuous conveying of the aluminum wire and the copper strip, the continuous preparation of the copper-clad aluminum photovoltaic welding strip is realized.

[0071] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent substitutions or changes according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A continuous preparation apparatus for copper-clad aluminum photovoltaic welding strip, comprising a chain conveyor table (1), wherein a mounting base (11) is fixedly connected to the top of the chain conveyor table (1), characterized in that, The mounting base (11) is provided with an aluminum wire indentation assembly (2) and a copper strip indentation assembly (3) that work together in a coordinated manner; The aluminum wire indentation assembly (2) includes a rotating cylinder (21) rotatably mounted on a mounting base (11), and the interior of the rotating cylinder (21) is provided with a plurality of movable plates (22) arranged in a ring array for clamping and straightening the aluminum wire, and a set of movable plates (23). The movable plates (22) are provided with a plurality of rolling balls (24), and the movable plates (23) are provided with a plurality of indentation protrusions (25) for pressing concave and convex marks on the annular surface of the aluminum strip. The copper strip indentation assembly (3) includes two sets of pressure plates (31) that move alternately in opposite directions and cooperate with the chain conveyor table (1), and the bottom of the pressure plates (31) is fixed with an indentation strip (32) for pressing concave and convex marks on the surface of the copper strip.

2. The continuous preparation apparatus for copper-clad aluminum photovoltaic welding strip according to claim 1, characterized in that, Multiple telescopic rods are fixedly connected between the first movable plate (22), the second movable plate (23), and the rotating cylinder (21), and a tension spring (26) is fixedly connected to the outside of the telescopic rods. Adjustment seats (27) for adjusting the position of the first movable plate (22) and the second movable plate (23) are symmetrically slidably connected on both sides inside the rotating cylinder (21).

3. The continuous preparation apparatus for copper-clad aluminum photovoltaic welding strip according to claim 2, characterized in that, The adjusting seat (27) has an inclined surface (28) on one side that slides with the ends of the movable plate one (22) and the movable plate two (23), and multiple limiting blocks are fixed on the annular outer wall of the adjusting seat (27). A limiting groove is opened on the inner wall of the rotating cylinder (21), and a bidirectional screw (29) that is threadedly connected to the adjusting seat (27) is rotatably connected to the rotating cylinder (21).

4. The continuous preparation apparatus for copper-clad aluminum photovoltaic welding strip according to claim 3, characterized in that, An auxiliary ring (210) is fixedly connected to one side of the rotating cylinder (21), and a plurality of first elastic plates (211) are fixedly connected at equal intervals on the inner wall of the auxiliary ring (210). A plurality of scrapers (212) are fixedly connected to the first elastic plates (211), and a plurality of second elastic plates (213) are fixedly connected to the adjusting seat (27) on one side, and a cleaning brush (214) is fixedly connected to the second elastic plates (213).

5. The continuous preparation apparatus for copper-clad aluminum photovoltaic welding strip according to claim 1, characterized in that, A gear ring is fixedly connected to the rotating cylinder (21), and a motor is installed on the mounting base (11) by bolts, and a gear that meshes with the gear ring is fixedly connected to the output shaft of the motor.

6. The continuous preparation apparatus for copper-clad aluminum photovoltaic welding strip according to claim 1, characterized in that, The mounting base (11) is symmetrically slidably connected to slide blocks (33) on both sides, and a bracket (34) fixed to the corresponding pressure plate (31) is slidably connected to the slide block (33). A spring telescopic pin (35) is fixedly connected to the bracket (34). The mounting base (11) is provided with a quadrilateral guide groove (12) that slides with the corresponding spring telescopic pin (35), and limit protrusions (13) are installed alternately on both sides of the quadrilateral guide groove (12).

7. The continuous preparation apparatus for copper-clad aluminum photovoltaic welding strip according to claim 6, characterized in that, A support plate (36) is fixedly connected to the slide (33), and a guide pin (37) is fixedly connected to the support plate (36). A cam groove (215) that slides with the guide pin (37) is provided on the annular outer wall of the rotating cylinder (21).

8. The continuous preparation apparatus for copper-clad aluminum photovoltaic welding strip according to claim 1, characterized in that, A fixed frame (14) is fixedly connected to one side of the chain conveyor (1), and a set of mutually cooperating pressing rollers (15) and material support deformation rollers (16) are rotatably connected to one side of the fixed frame (14), and multiple sets of mutually cooperating left extrusion rollers (17) and right extrusion rollers (18) are rotatably connected to the other side of the fixed frame (14).

9. The continuous preparation apparatus for copper-clad aluminum photovoltaic welding strip according to claim 8, characterized in that, Copper strip guide rollers are installed on the opposite sides of the chain conveyor (1) and the fixed frame (14). A drawing die (19) is fixedly installed on the side of the fixed frame (14) away from the copper strip guide rollers, and an auxiliary notch (110) is opened on the top side of the drawing die (19).

10. A continuous manufacturing process for copper-clad aluminum photovoltaic ribbon, employing the continuous manufacturing apparatus for copper-clad aluminum photovoltaic ribbon as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Aluminum wire surface indentation: Multiple movable plates (22) move to center and clamp the aluminum wire, and the indentation protrusions (25) on the movable plate (23) press the outer wall of the aluminum wire ring. Combined with the rotation of the rotating cylinder (21) and the horizontal conveying of the aluminum wire, spiral concave and convex marks are extruded on the surface of the aluminum wire. S2: Aluminum wire cleaning and straightening: Multiple movable plates (22) squeeze and clamp the aluminum wire for straightening. The auxiliary ring (210) and the adjusting seat (27) rotate, driving the first elastic plate (211) and the second elastic plate (213) to rotate circumferentially. The scraper (212) scrapes off the oxide layer on the surface of the aluminum wire, and the cleaning brush (214) cleans the surface debris. S3: Copper strip surface indentation: The rotating cylinder (21) links two sets of sliding blocks (33) to slide synchronously and in opposite directions, and then the quadrilateral guide groove (12) causes the bracket (34) to carry the corresponding pressure plate (31) to reciprocate, and the chain plate conveyor (1) continuously extrudes oblique concave and convex marks on the surface of the copper strip. S4: Continuous preparation of copper-clad aluminum welding strip: The pressure roller (15) and the support deformation roller (16) cause the copper wire and the copper strip to come into contact, and the copper strip partially wraps the aluminum wire. Then, through multiple sets of left extrusion rollers (17) and right extrusion rollers (18), the copper strip fully wraps the aluminum wire, and the concave and convex marks on the copper strip and the aluminum wire are interlocked. Then, the copper strip is subjected to secondary strengthening extrusion treatment through the drawing die (19).

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