Copper wire surface treatment wire drawing device for photovoltaic welding strip

Abstract

The invention relates to a photovoltaic solder strip copper wire surface treatment wire drawing device which comprises a base, winding feeding mechanisms and a die fixing mechanism, the top of the base is provided with the two winding feeding mechanisms and the die fixing mechanism, the die fixing mechanism is located in the middle of the two winding feeding mechanisms, each winding feeding mechanism comprises two shaft brackets, and the two shaft brackets are arranged on the base. A rotating shaft is installed between the shaft brackets, a conical wheel is installed on the rotating shaft, a plurality of baffle rings are arranged on the outer side of the conical wheel at equal intervals, a guide rail is arranged at the top of the base and located between the two shaft brackets, a sliding block is installed on the guide rail in a sliding mode, and a fixed gear ring is arranged on the sliding block; the double-winding feeding mechanism is matched with the multi-stage wire drawing die to achieve continuous copper wire die penetrating, winding disorder is avoided through layered winding of the conical wheel and positioning of the baffle ring, the wire drawing efficiency is remarkably improved, the pneumatic clamping jaw and the adjustable wheel set work cooperatively, copper wire guiding, clamping and die penetrating are automatically completed, and manual intervention is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of photovoltaic welding strip processing, and particularly relates to a copper wire surface treatment wire drawing device for photovoltaic welding strips. BACKGROUND

[0002] In a photovoltaic welding strip manufacturing process, as a key conductive material, the diameter precision and surface quality of copper wire directly affect the conductive performance and welding reliability of the welding strip.

[0003] The traditional copper wire drawing process has the following technical problems: the fixed mode of the die is backward, mechanical fastening is adopted, the die needs to be disassembled during replacement, the average time consumption is 5-8 minutes, the positioning accuracy of the die depends on manual adjustment, the coaxiality error is high, the sealing performance of the cooling liquid is poor, the working environment is humid, the die rusting rate increases, the heat dissipation efficiency is low, when external spraying cooling is used, only 30% of the cooling liquid can effectively cover the working surface of the die, the die temperature can reach more than 200 DEG C during continuous wire drawing, which leads to hot deformation of the drawing hole, oxidation and discoloration of the copper wire surface and shortening of the service life of the die; the degree of automation is insufficient, the threading operation needs manual wire leading, the multi-stage wire drawing needs repeated disassembly and assembly of the die, the tension control is unstable, and the wire breaking rate is high. SUMMARY

[0004] The application solves the technical problems of the traditional copper wire drawing process, such as backward fixed mode of the die, mechanical fastening by bolts, disassembly during die replacement, average time consumption of 5-8 minutes, positioning accuracy of the die depending on manual adjustment, high coaxiality error, poor sealing performance of the cooling liquid, humid working environment, increased die rusting rate, low heat dissipation efficiency, only 30% of the cooling liquid effectively covering the working surface of the die during external spraying cooling, die temperature reaching more than 200 DEG C during continuous wire drawing, leading to hot deformation of the drawing hole, oxidation and discoloration of the copper wire surface and shortening of the service life of the die, insufficient degree of automation, manual wire leading during threading operation, repeated disassembly and assembly of the die during multi-stage wire drawing, unstable tension control and high wire breaking rate.

[0005] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme:

[0006] The utility model provides a copper wire surface treatment wire drawing device for photovoltaic welding strip, including base, winding feeding mechanism and die fixed mechanism, two winding feeding mechanisms and die fixed mechanism are installed to the top of base, and die fixed mechanism is located the middle position of two winding feeding mechanisms, winding feeding mechanism includes two axle bracket, the shaft is installed between axle bracket, the conical wheel is installed to the axle, and a plurality of blocking rings are arranged at the outside of conical wheel at equal intervals, the guide rail is set up between two axle brackets on the top of base, the sliding block is installed to the guide rail, the fixed tooth ring is set up to the sliding block, the rotating ring is rotatably installed in the fixed tooth ring, the rotating disc is rotatably installed to the rotating ring, the pneumatic clamp jaw is slidably installed to the rotating disc, two clamp jaws of pneumatic clamp jaw are respectively installed with the wheel seat, a plurality of concave wheels are installed in one wheel seat, and a plurality of convex wheels are installed in another wheel seat,

[0007] Die fixed mechanism includes two installation in the upper end column of base, the upper clamp cover and the lower clamp cover are slidably installed between two end columns, a plurality of wire drawing die with different wire drawing hole diameters are clamped between the upper clamp cover and the lower clamp cover at equal intervals, the inside top side of the upper clamp cover is installed with the spray pipe, and a plurality of spray holes are formed in the bottom side of the spray pipe.

[0008] Preferably, a first motor is installed on the axle bracket, a one-way threaded rod is installed on the output end of the first motor, and the one-way threaded rod is in threaded connection with the sliding block.

[0009] Preferably, the fixed tooth ring and the rotating ring are connected through a bearing, a second motor is installed on the rotating ring, a rotating tooth is installed on the output end of the second motor, and the rotating tooth is in meshing connection with the fixed tooth ring.

[0010] Preferably, a third motor is installed on the rotating ring, and the output end of the third motor is connected with the rotating disc.

[0011] A translation slot is formed in the rotating disc, a motor is installed in the rotating disc, a threaded screw rod is installed in the translation slot on the output end of the motor, and the threaded screw rod is in threaded connection with the translation block at the end of the pneumatic clamp jaw.

[0012] Preferably, a third motor is installed on one of the wheel seats, a sprocket is installed at the end of the concave wheel at both ends in the wheel seat, two sprockets are installed at the end of the concave wheel at the middle position in the wheel seat, the adjacent two sprockets in the same plane are connected through a chain transmission, and the output end of the third motor is connected with one of the sprockets.

[0013] Preferably, a sliding groove is formed in the end column, a fifth motor is installed at the end of the end column, a bidirectional threaded rod is installed in the sliding groove on the output end of the fifth motor, the threaded directions of the two ends of the bidirectional threaded rod are opposite, and the two ends of the bidirectional threaded rod are in threaded connection with the end of the upper clamp cover and the end of the lower clamp cover respectively.

[0014] Preferably, the top side of the upper clamp cover is provided with a water inlet pipe connected with the spray pipe of the lower clamp cover, and the bottom of the lower clamp cover is provided with a drain pipe.

[0015] Preferably, the two ends of the wire drawing die are respectively provided with ring grooves, the bottom side of the upper clamp cover and the bottom side of the lower clamp cover are provided with clamping grooves matched with the ring grooves, and sealing pads are arranged in the clamping grooves, and a plurality of cooling fins are arranged on the outer side of the wire drawing die.

[0016] Preferably, the diameters of the wire drawing holes of the plurality of wire drawing dies gradually decrease from small to large along the diameter of the taper wheel.

[0017] Preferably, the specific operation steps of the device are as follows:

[0018] Step one: first, clamp the end of the copper wire after end polishing and cutting between the concave wheel and the convex wheel of one of the winding feeding mechanisms, drive the unidirectional threaded rod to rotate through the work of the first motor, and then drive the sliding block to move along the guide rail, move the pneumatic clamping jaw to the end of the wire drawing die, adjust the center positions of the concave wheel and the convex wheel and the wire drawing hole of the wire drawing die to be on the same straight line through the work of the second motor, at this time, rotate the concave wheel through the work of the fourth motor and the transmission of the sprocket and chain, at this time, the copper wire located in the concave wheel and the convex wheel passes through the wire drawing die and is located between the concave wheel and the convex wheel of the other winding feeding mechanism, at this time, the pneumatic clamping jaw is retracted to clamp the copper wire through the concave wheel and the convex wheel, then rotate the rotating gear through the second motor, cooperate with the fixed gear ring, drive the rotating ring to rotate, and then wind the copper wire on the taper wheel, then rotate the rotating disc through the third motor, and the pneumatic clamping jaw is translated and adjusted, and the sliding block is translated again, the end of the copper wire is adjusted again with the wire drawing hole of the other wire drawing die, then the above operation is repeated, the copper wire passes through the wire drawing die again, and the operation is performed in turn, the copper wire passes through the wire drawing die and is wound on the taper wheel, and when the copper wire passes through all the wire drawing dies, the copper wire is wound through the winding mechanism, and the copper wire is drawn when passing through the wire drawing holes of the wire drawing dies which gradually decrease.

[0019] Step two: rotate the bidirectional threaded rod through the fifth motor, and then drive the threaded connection of the upper clamp cover and the lower clamp cover to combine and separate, so as to facilitate the installation and replacement of the wire drawing die, when working, the water pump works, the cooling water is sprayed from the spray hole of the spray pipe to the surface of the wire drawing die through the water inlet pipe, and the heat exchange efficiency is improved through the cooling fins to cool and cool the wire drawing die.

[0020] The beneficial effects of the present application are: the double winding feeding mechanism cooperates with the multi-stage wire drawing die to realize continuous wire drawing of the copper wire, the taper wheel is used for layered winding and the blocking ring is used for positioning to avoid tangled winding and significantly improve the wire drawing efficiency, the pneumatic clamping jaw and the adjustable wheel set work cooperatively to automatically complete the copper wire guiding, clamping and drawing, and manual intervention is reduced.

[0021] The first motor drives the sliding block to translate, the second motor realizes the rotation of the rotating ring, and the third motor realizes the rotation of the rotating disc, so that the copper wire and the wire drawing hole are always coaxially aligned, the wire drawing precision is improved, the screw thread screw rod rotation realizes the translation of the pneumatic clamping jaw, and the position change of the die of different hole diameters is dynamically adapted;

[0022] The spray pipe and the fin are combined to be designed, the sealing clamping groove structure is matched, the wire drawing die is efficiently cooled, the service life of the die is prolonged, and the wire drawing quality is guaranteed, the bidirectional screw rod drives the upper clamping cover and the lower clamping cover to be quickly opened and closed, and the die is convenient to replace and maintain. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole structure schematic view of the present application;

[0024] Figure 2 It is a first structure schematic view of the winding feeding mechanism of the present application;

[0025] Figure 3 It is a second structure schematic view of the winding feeding mechanism of the present application;

[0026] Figure 4 It is a rotating disc structure schematic view of the present application Figure 3 It is a local enlarged view of the A area of the present application;

[0027] Figure 5 It is a rotating disc structure schematic view of the present application

[0028] Figure 6 It is a wheel seat sectional view of the present application;

[0029] Figure 7 It is a first structure schematic view of the die fixing mechanism of the present application;

[0030] Figure 8 It is a second structure schematic view of the die fixing mechanism of the present application;

[0031] Figure 9 It is a sectional view of the die fixing mechanism of the present application.

[0032] LEGEND:

[0033] 1, base; 2, winding feeding mechanism; 3, mold fixing mechanism; 4, shaft support; 5, rotating shaft; 6, conical wheel; 7, blocking ring; 8, guide rail; 9, sliding block; 10, one-way threaded rod; 11, first motor; 12, fixed tooth ring; 13, rotating ring; 14, rotating disc; 141, translation groove; 142, motor; 143, threaded screw; 15, pneumatic clamping jaw; 16, wheel seat; 17, concave wheel; 18, convex wheel; 19, second motor; 20, rotating tooth; 21, third motor; 22, sprocket; 23, fourth motor; 24, end column; 25, sliding slot; 26, upper clamping cover; 27, lower clamping cover; 28, wire drawing die; 29, water inlet pipe; 30, spray pipe; 31, spray hole; 32, drain pipe; 33, fifth motor; 34, two-way threaded rod; 35, ring groove; 36, heat sink. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to 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 work fall within the scope of protection of the present application.

[0035] Specific embodiments are given below.

[0036] Reference is made to Figures 1-9The utility model provides a copper wire surface treatment wire drawing device for photovoltaic welding strip, including base 1, winding feeding mechanism 2 and die fixed establishment 3, two winding feeding mechanism 2 and die fixed establishment 3 are installed on the top of base 1, and die fixed establishment 3 is located the intermediate position in two winding feeding mechanism 2, winding feeding mechanism 2 includes two axle bracket 4, is installed with the shaft 5 between axle bracket 4, is installed with the taper wheel 6 on the shaft 5, and a plurality of stop ring 7 are arranged at equal intervals outside the taper wheel 6, the guide rail 8 is set up between two axle bracket 4 and on the top of base 1, the sliding block 9 is slidably installed on the guide rail 8, the first motor 11 is installed on axle bracket 4, the one-way screw rod 10 is installed on the output of first motor 11, the one-way screw rod 10 is connected with sliding block 9 by screw thread, the fixed tooth ring 12 is set up on sliding block 9, the swivel ring 13 is rotatably installed in fixed tooth ring 12, fixed tooth ring 12 and swivel ring 13 are connected through bearing, the second motor 19 is installed on swivel ring 13, the gear wheel 20 is installed on the output of second motor 19, and the gear wheel 20 is engaged with fixed tooth ring 12, the turntable 14 is rotatably installed on swivel ring 13, the third motor 21 is installed on swivel ring 13, the output of third motor 21 is connected with turntable 14, the pneumatic clamping jaw 15 is slidably installed on turntable 14, the translation slot 141 is set up on turntable 14, the motor 142 is installed in turntable 14, the threaded lead screw 143 is installed in the translation slot 141 and is connected with the translation block at the end of pneumatic clamping jaw 15 by screw thread, the two clamping jaws of pneumatic clamping jaw 15 are respectively installed with the wheel seat 16, a plurality of concave wheels 17 are installed in one wheel seat 16, and a plurality of convex wheels 18 are installed in another wheel seat 16, the third motor 21 is installed on one wheel seat 16, one sprocket 22 is installed at the end of the concave wheel 17 located at the both ends inside the wheel seat 16, two sprockets 22 are installed at the end of the concave wheel 17 located at the intermediate position inside the wheel seat 16, the adjacent two sprockets 22 on the same plane are connected through chain transmission, the third motor 21 output is connected with one of the sprockets 22, the copper wire end is clamped between the concave wheel 17 and the convex wheel 18, the fourth motor 23 drives the sprocket 22 and the chain transmission, drives the concave wheel 17 to rotate, makes copper wire forward delivery, the first motor 11 drives the one-way screw rod 10, makes the sliding block 9 move along the guide rail 8, adjusts the position of pneumatic clamping jaw 15, the second motor 19 drives the gear wheel 20, drives the swivel ring 13 to rotate, makes the center of the concave wheel 17 and the convex wheel 18 align with the wire drawing hole of wire drawing die 28, and the motor 142 adjusts the translation of pneumatic clamping jaw 15 through the threaded lead screw 143, and the concave wheel 17 and the convex wheel 18 are close to wire drawing die 28, after copper wire passes through wire drawing die 28, enters the winding feeding mechanism 2 on the other side, is clamped by pneumatic clamping jaw 15, and continues to pull, along with the rotation of swivel ring 13, makes copper wire winding on the taper wheel 6, and the stop ring 7 ensures that copper wire is layered winding, avoids to be entangled confusion;

[0037] The mold fixing mechanism 3 comprises two end columns 24 mounted on the base 1, an upper clamping cover 26 and a lower clamping cover 27 slidingly mounted between the two end columns 24, a sliding groove 25 is formed in the end column 24, a fifth motor 33 is mounted on the end of the end column 24, a bidirectional threaded rod 34 is mounted in the sliding groove 25 at the output end of the fifth motor 33, the screw directions of the two ends of the bidirectional threaded rod 34 are opposite, the two ends of the bidirectional threaded rod 34 are respectively threadedly connected with the end of the upper clamping cover 26 and the end of the lower clamping cover 27, a plurality of wire drawing dies 28 with different hole diameters are clamped at equal intervals between the upper clamping cover 26 and the lower clamping cover 27, a spraying pipe 30 is mounted on the top side of the inside of the upper clamping cover 26, a plurality of spray holes 31 are formed in the bottom side of the spraying pipe 30, a water inlet pipe 29 connected with the spraying pipe 30 of the lower clamping cover 27 is mounted on the top side of the upper clamping cover 26, a drain pipe 32 is mounted on the bottom of the lower clamping cover 27, a ring groove 35 is formed in the two ends of the wire drawing die 28, a clamping groove matched with the ring groove 35 is arranged on the bottom side of the upper clamping cover 26 and the bottom side of the lower clamping cover 27, and a sealing gasket is mounted in the clamping groove, a plurality of cooling fins 36 are arranged on the outside of the wire drawing die 28, the hole diameters of the wire drawing dies 28 gradually decrease from small to large along the diameter of the taper wheel 6, the fifth motor 33 drives the bidirectional threaded rod 34 to rotate, so that the upper clamping cover 26 and the lower clamping cover 27 move synchronously and reversely along the sliding groove 25, one-key opening and closing is realized, the ring grooves 35 at the two ends of the wire drawing die 28 are embedded in the clamping grooves of the clamping covers, and the sealing gaskets prevent the cooling liquid from leaking, so as to ensure the axial fixation of the mold, the plurality of wire drawing dies 28 are arranged from large to small according to the hole diameters, and are matched with the winding direction of the taper wheel 6, the copper wire passes through the dies with different hole diameters in sequence and is gradually stretched to the target diameter, the cooling liquid enters the spraying pipe 30 from the water inlet pipe 29 and is uniformly sprayed to the surface of the mold through the spray holes 31, the heat exchange efficiency is enhanced in combination with the cooling fins 36, and finally the cooling liquid is discharged through the drain pipe 32.

[0038] Working principle: first, the end of the copper wire after cutting is clamped between the concave wheel 17 and the convex wheel 18 of one of the winding feeding mechanisms 2, the one-way threaded rod 10 is rotated by the first motor 11, and then the sliding block 9 moves along the guide rail 8, the pneumatic clamp jaw 15 moves to the end of the drawing die 28, the center position of the concave wheel 17 and the convex wheel 18 is adjusted by the second motor 19 to be on the same straight line with the drawing hole of the drawing die 28, at this time, the concave wheel 17 is rotated by the fourth motor 23, the chain wheel 22 and the chain drive the concave wheel 17 to rotate, at this time, the copper wire located between the concave wheel 17 and the convex wheel 18 passes through the drawing die 28 and is located between the concave wheel 17 and the convex wheel 18 of the other winding feeding mechanism 2, at this time, the pneumatic clamp jaw 15 is retracted to clamp the copper wire through the concave wheel 17 and the convex wheel 18, then the rotating gear 20 is rotated by the second motor 19, cooperates with the fixed gear ring 12 to rotate the rotating ring 13, and then the copper wire is wound on the tapered wheel 6, then the rotating disc 14 is rotated by the third motor 21, and the pneumatic clamp jaw 15 is translated, and the translation of the sliding block 9 is adjusted, the end of the copper wire is adjusted again with the drawing hole of the other drawing die 28, then the above operation is repeated, the copper wire passes through the drawing die 28 again, and the copper wire is wound on the tapered wheel 6 in turn, when the copper wire passes through all the drawing dies 28, the copper wire is wound by the winding mechanism, the copper wire is drawn when passing through the drawing holes of the drawing dies 28 which gradually become smaller, the upper clamp cover 26 and the lower clamp cover 27 are combined and separated by rotating the two-way threaded rod 34 by the fifth motor 33, so as to facilitate the installation and replacement of the drawing die 28, when working, the water pump works, the cooling water is sprayed from the spray hole 31 of the spray pipe 30 to the surface of the drawing die 28 through the water inlet pipe 29, and the heat exchange efficiency is improved by the heat dissipation fin 36 to cool the drawing die 28.

[0039] The double winding feeding mechanism 2 cooperates with the multi-stage drawing die 28 to realize continuous drawing of the copper wire, the copper wire is layered wound by the tapered wheel 6 and positioned by the blocking ring 7, the winding is avoided to be chaotic, the drawing efficiency is significantly improved, the pneumatic clamp jaw 15 cooperates with the adjustable wheel set to automatically complete the copper wire guiding, clamping and drawing, and the manual intervention is reduced.

[0040] The first motor 11 drives the sliding block 9 to translate, the second motor 19 rotates the rotating ring 13, the third motor 21 rotates the rotating disc 14, so as to ensure that the copper wire is always coaxially aligned with the drawing hole, improve the drawing precision, and the threaded screw 143 rotates to realize the translation of the pneumatic clamp jaw 15, dynamically adapt to the position change of the die with different hole diameters.

[0041] The spray pipe 30 is combined with the heat dissipation fin 36, cooperates with the sealing clamping groove structure, realizes efficient cooling of the wire drawing die 28, prolongs the die life and guarantees the wire drawing quality, the bidirectional threaded rod 34 drives the upper clamping cover 26 and the lower clamping cover 27 to open and close quickly, and the die replacement and maintenance are facilitated.

[0042] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A copper wire surface treatment and drawing device for photovoltaic welding strips, characterized in that, The system includes a base (1), a winding and feeding mechanism (2), and a mold fixing mechanism (3). Two winding and feeding mechanisms (2) and a mold fixing mechanism (3) are mounted on the top of the base (1), with the mold fixing mechanism (3) located between the two winding and feeding mechanisms (2). Each winding and feeding mechanism (2) includes two shaft supports (4), with a rotating shaft (5) installed between the shaft supports (4). A conical wheel (6) is mounted on the rotating shaft (5), and several retaining rings (7) are evenly spaced on the outer side of the conical wheel (6). A set of retaining rings (7) is located on the top of the base (1) between the two shaft supports (4). A guide rail (8) is provided, and a slider (9) is slidably mounted on the guide rail (8). A fixed toothed ring (12) is provided on the slider (9). A rotating ring (13) is rotatably mounted inside the fixed toothed ring (12). A turntable (14) is rotatably mounted on the rotating ring (13). A pneumatic gripper (15) is slidably mounted on the turntable (14). Two grippers of the pneumatic gripper (15) are respectively mounted with wheel seats (16). One of the wheel seats (16) is equipped with several concave wheels (17), and the other wheel seat (16) is equipped with several convex wheels (18). The mold fixing mechanism (3) includes two upper end posts (24) mounted on the base (1). An upper clamping cover (26) and a lower clamping cover (27) are slidably installed between the two end posts (24). Several wire drawing molds (28) with different wire drawing hole diameters are clamped between the upper clamping cover (26) and the lower clamping cover (27) at equal intervals. A spray pipe (30) is installed on the top side inside the upper clamping cover (26). Several spray holes (31) are opened on the bottom side of the spray pipe (30).

2. The copper wire surface treatment and drawing device for photovoltaic welding strips according to claim 1, characterized in that, A first motor (11) is mounted on the shaft frame (4), and a one-way threaded rod (10) is mounted on the output end of the first motor (11). The one-way threaded rod (10) is threadedly connected to the slider (9).

3. The copper wire surface treatment and drawing device for photovoltaic welding strips according to claim 2, characterized in that, The fixed gear ring (12) and the rotating ring (13) are connected by a bearing. A second motor (19) is installed on the rotating ring (13). A rotating tooth (20) is installed at the output end of the second motor (19), and the rotating tooth (20) meshes with the fixed gear ring (12).

4. The copper wire surface treatment and drawing device for photovoltaic welding strips according to claim 3, characterized in that, A third motor (21) is installed on the rotating ring (13), and the output end of the third motor (21) is connected to the turntable (14); The turntable (14) is provided with a translation groove (141), and a motor (142) is installed in the turntable (14). The output end of the motor (142) is located in the translation groove (141) and a threaded screw (143) is installed therein. The threaded screw (143) is threadedly connected to the translation block at the end of the pneumatic gripper (15).

5. The copper wire surface treatment and drawing device for photovoltaic welding strips according to claim 4, characterized in that, A third motor (21) is installed on one of the wheel seats (16). A sprocket (22) is installed at the end of the concave wheel (17) located at both ends inside the wheel seat (16). Two sprockets (22) are installed at the end of the concave wheel (17) located in the middle inside the wheel seat (16). Two adjacent sprockets (22) on the same plane are connected by chain drive. The output end of the third motor (21) is connected to one of the sprockets (22).

6. The copper wire surface treatment and drawing device for photovoltaic welding strips according to claim 5, characterized in that, The end post (24) is provided with a sliding groove (25), and a fifth motor (33) is installed at the end of the end post (24). The output end of the fifth motor (33) is located in the sliding groove (25) and a bidirectional threaded rod (34) is installed. The threads at both ends of the bidirectional threaded rod (34) are opposite in direction. The two ends of the bidirectional threaded rod (34) are respectively threaded to the ends of the upper clamp (26) and the lower clamp (27).

7. The copper wire surface treatment and drawing device for photovoltaic welding strips according to claim 6, characterized in that, The upper cover (26) is equipped with a water inlet pipe (29) connected to the spray pipe (30) of the lower cover (27) on its top side, and a drain pipe (32) is installed at the bottom of the lower cover (27).

8. The copper wire surface treatment and drawing device for photovoltaic welding strips according to claim 7, characterized in that, The wire drawing die (28) has annular grooves (35) at both ends. The bottom side of the upper clamping cover (26) and the bottom side of the lower clamping cover (27) are provided with slots that are compatible with the annular grooves (35), and a sealing gasket is installed in the slot. Several heat sinks (36) are provided on the outside of the wire drawing die (28).

9. A copper wire surface treatment drawing device for photovoltaic welding strips according to claim 8, characterized in that, The diameter of the drawing holes of several drawing dies (28) gradually decreases along the direction from small to large along the diameter of the conical wheel (6).

10. A copper wire surface treatment drawing device for photovoltaic welding strips according to claim 9, characterized in that, The specific operating steps of this device are as follows: Step 1: First, the end of the copper wire after end grinding and cutting is clamped between the concave wheel (17) and convex wheel (18) of one of the winding and feeding mechanisms (2). The first motor (11) drives the one-way threaded rod (10) to rotate, which in turn drives the slider (9) to move along the guide rail (8), moving the pneumatic gripper (15) to the end of the wire drawing die (28). The second motor (19) adjusts the center position of the concave wheel (17) and convex wheel (18) to be on the same straight line as the wire drawing hole of the wire drawing die (28). At this time, the fourth motor (23) drives the sprocket and chain drive to rotate the concave wheel (17). At this time, the copper wire located in the concave wheel (17) and convex wheel (18) passes through the wire drawing die (28) and is located between the concave wheel (17) and convex wheel (18) of the other winding and feeding mechanism (2). At this time, the pneumatic gripper (15) The copper wire is clamped by the concave wheel (17) and the convex wheel (18). Then, the second motor (19) drives the rotating tooth (20) to rotate, which cooperates with the meshing fixed tooth ring (12) to drive the rotating ring (13) to rotate, thereby winding the copper wire onto the conical wheel (6). Then, the third motor (21) drives the turntable (14) to rotate, and the pneumatic gripper (15) is adjusted by translation. At the same time, the slider (9) is adjusted to adjust the end of the copper wire and the drawing hole of another drawing die (28). Then, the above operation is repeated to pass the copper wire through the drawing die (28) again. The copper wire is passed through the drawing die (28) and wound onto the conical wheel (6) in sequence. After the copper wire passes through all the drawing dies (28), the copper wire is wound up by the winding mechanism. The copper wire completes the drawing operation when it passes through the drawing dies (28) with the drawing hole gradually getting smaller. Step 2: The fifth motor (33) drives the bidirectional threaded rod (34) to rotate, thereby driving the upper clamp (26) and lower clamp (27) connected by threads to combine and separate, so as to facilitate the installation and replacement of the wire drawing die (28). When working, the water pump works, and the water inlet pipe (29) sprays cooling water from the spray hole (31) of the spray pipe (30) onto the surface of the wire drawing die (28). The heat exchange efficiency is improved by the heat sink (36) to cool down the wire drawing die (28).

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