Ultra-fine round wire photovoltaic welding ribbon manufacturing performance testing equipment and process

Abstract

The present invention relates to the technical field of photovoltaic welding ribbon manufacturing performance testing, specifically to an ultra-fine round wire photovoltaic welding ribbon manufacturing performance testing device and process, comprising a test base plate, a vertical plate symmetrically fixed on the top of the test base plate, two groups of hydraulic cylinders symmetrically installed on the opposite sides of the two vertical plates, each group of hydraulic cylinders being linearly and evenly distributed, a clamping unit being provided at the pushing end of each hydraulic cylinder, a limiting unit being provided on the two adjacent clamping units, and a bending unit being provided on the top of the test base plate and between the two clamping units. The present invention adopts a testing method of stretching and testing the tensile strength of a section of photovoltaic welding ribbon standard sample and two sections of photovoltaic welding ribbon test samples, and limits the contraction of the hydraulic cylinder by the limiting unit, so that the hydraulic cylinder contracts by the same distance each time, so that the force applied to the test sample each time is exactly the same, thereby increasing the accuracy of the test result.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic welding ribbon manufacturing performance detection technology, and specifically to an ultra-fine round wire photovoltaic welding ribbon manufacturing performance detection device and process. Background Art

[0002] Ultra-fine round photovoltaic ribbon is a connection material designed specifically for high-performance photovoltaic modules. Its diameter is typically thinner than traditional round photovoltaic ribbon. This type of ribbon offers significant advantages in improving the photovoltaic module's photoelectric conversion efficiency and reliability. The performance of ultra-fine round photovoltaic ribbon directly impacts the module's photoelectric conversion efficiency and reliability. The tensile strength of ultra-fine round photovoltaic ribbon not only affects the performance and reliability of the module, but also directly impacts the lifespan and safety of the entire photovoltaic system. Therefore, rapid tensile strength testing of ultra-fine round photovoltaic ribbon is crucial.

[0003] Among the devices that actually detect photovoltaic welding ribbons, there is a utility model patent with publication number CN214844474U, which discloses a photovoltaic welding ribbon tensile strength detection device. This technical solution fixes one end of the photovoltaic welding ribbon on a tension sensor, and the other end passes through a U-shaped groove and through the surface of the column. After passing through, the electric telescopic rod is started, and the electric telescopic rod is adapted to the opening. The electric telescopic rod squeezes the photovoltaic welding ribbon into the opening, and the electric telescopic rod squeezes and supports the photovoltaic welding ribbon. At this time, a part of the end of the photovoltaic welding ribbon is still outside the opening, reducing the possibility of falling off. After fixing, the motor is started, the threaded rod rotates, and the thread on the surface of the threaded rod is a positive and negative thread. The two bottom blocks move in opposite directions through the sliding assembly, and the readings are read through the tension sensor. The simultaneous movement of the two bottom blocks saves half of the detection time and improves efficiency.

[0004] Although the above technical solution can quickly read the tension applied to the photovoltaic ribbon when it breaks through the tension sensor, and thus quickly calculate the tensile strength of the photovoltaic ribbon test sample, when fixing the photovoltaic ribbon, only one end is fixed on the tension sensor, and the other end is tightened by an electric telescopic rod. The photovoltaic ribbon cannot be stably clamped, which causes the end of the photovoltaic ribbon to loosen during the tension process, thereby causing deviations in the test results.

[0005] In addition, during the actual use of photovoltaic welding ribbons, multiple photovoltaic modules need to be connected in series so that the photovoltaic modules form a complete solar panel. During this process, the photovoltaic welding ribbon needs to be bent multiple times and may be subjected to friction. During the repeated bending of the photovoltaic welding ribbon, the metal grains inside it will be deformed and damaged, resulting in a decrease in the tensile strength of the photovoltaic welding ribbon. However, the above technical solution only performs tensile strength testing by manually bending the photovoltaic welding ribbon to be tested. This method is time-consuming and labor-intensive, and the photovoltaic welding ribbon is not rubbed, making the detection inaccurate. Summary of the Invention

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an ultra-fine round wire photovoltaic welding ribbon manufacturing performance testing equipment, including a test base plate, vertical plates are symmetrically fixed on the top of the test base plate, two groups of hydraulic cylinders are symmetrically installed on the opposite sides of the two vertical plates, each group of hydraulic cylinders is linearly and evenly distributed, and a clamping unit is provided at the pushing end of each hydraulic cylinder, and a limiting unit is commonly provided on the two adjacent clamping units in front and behind, and a bending unit is provided between the two clamping units on the top of the test base plate and located on the front side; the clamping unit includes a fixed plate fixed at the pushing end of the hydraulic cylinder, and connecting plates are symmetrically fixed on the front and rear sides of the fixed plate, and the two connecting plates are commonly fixed with an installation plate at one end away from the fixed plate. The mounting roller is provided with a limiting groove, and a synchronous ring is rotatably installed on the mounting roller and located on the front and rear sides of the limiting groove. An end clamping element is installed between the two synchronous rings, and a positioning structure is provided on the opposite sides of the two synchronous rings and at the position of the corresponding end clamping element. A pressing element driven by the synchronous ring to stably clamp the welding strip is provided on the side of the mounting roller; the limiting unit is used to limit the contraction of the hydraulic cylinder so that the contraction distance of the hydraulic cylinder is the same each time; the bending unit includes a fixed block fixed on the top of the test base plate, a mounting plate is fixed on the top of the test base plate and located on the right rear side of the fixed block, a front extension column is fixed on the top of the mounting plate, and bending elements are symmetrically provided on the bottom front end of the front extension column and the top of the fixed block.

[0007] Furthermore, the end clamping element includes an arc-shaped longitudinal plate fixed between two synchronous rings, a fixed clamping plate is installed on the circumferential side of the arc-shaped longitudinal plate, a positioning block is fixed on the side of the arc-shaped longitudinal plate away from the mounting roller, an inner groove is jointly provided between the positioning block and the arc-shaped longitudinal plate, an adjusting stud is rotatably installed on the side of the inner groove close to the fixed clamping plate, and a movable clamping plate is threadedly connected to the adjusting stud and located in the inner groove.

[0008] Furthermore, the positioning structure includes a positioning plate fixed on the side of the synchronous ring away from the limiting groove, the positioning plate corresponds to the position of the arc-shaped longitudinal plate, a positioning hole is opened in the middle position of the positioning plate, and a matching hole for matching the positioning hole is opened on the side of the mounting roller, and a positioning pin is connected between the positioning hole and the matching hole at the corresponding position.

[0009] Furthermore, the pressing element includes a limiting rod symmetrically fixed on the side of the mounting roller in the front and rear directions, the angle between the limiting rod and the hydraulic cylinder is an acute angle, and the two limiting rods are slidably connected with a connecting rod, and an arc-shaped movable plate is connected between the two connecting rods. The arc-shaped movable plate is provided with a pressing structure near the side of the mounting roller, and the bottom of the two connecting rods and the synchronous ring are jointly connected with a pushing structure, and the arc-shaped movable plate is pushed by the pushing structure and the pressing structure presses the welding strip.

[0010] Furthermore, the pressing structure includes square elastic telescopic rods uniformly arranged on the side of the arc-shaped movable plate close to the mounting roller. The positions of all square elastic telescopic rods correspond to the positions of the limit slots, and an arc-shaped pressure plate is fixed to the telescopic end of each square elastic telescopic rod.

[0011] Furthermore, the pushing structure includes a pushed block fixed on the side away from the mounting roller, a bending rod fixed on the side of the synchronous ring, a pushing block fixed on one end of the bending rod close to the pushed block, and matching slopes are provided on the sides of the pushed block and the pushing block.

[0012] Furthermore, the limiting unit includes an outer sleeve block fixed at the front end of the fixed plate located on the rear side of the two adjacent fixed plates, a positioning groove is opened in the outer sleeve block, a limiting structure is set in the outer sleeve block and at the position of the positioning groove, and an embedded block is fixed at the rear end of the fixed plate located on the front side of the two adjacent fixed plates.

[0013] Furthermore, the bending element includes a cylinder, a horizontal slide rail is fixed to the pushing end of the cylinder, a semicircular block is connected to the bottom of the horizontal slide rail through an electric slider, a beam groove is opened on the arc side of the semicircular block, and a longitudinal bending structure is provided on the side of the clamping unit close to the corresponding side of the horizontal slide rail, wherein the cylinder in the bending element on the front extension column is fixedly connected to the lower end of the front extension column, and the cylinder in the bending element on the fixed block is fixedly connected to the top of the fixed block.

[0014] Furthermore, the longitudinal bending structure includes an inclined plate fixed on the side of the clamping unit near the corresponding side of the horizontal slide rail, an elastic telescopic square rod is hinged at the bottom of the inclined plate, a torsion spring is provided at the hinge position of the elastic telescopic square rod and the bottom of the inclined plate, a restraining sleeve is fixed at the telescopic end of the elastic telescopic square rod, a push rod is fixed on the side of the elastic telescopic square rod, and a pushing rod for pushing the pushed rod is fixed on the side of the electric slider.

[0015] Furthermore, the present invention also provides a manufacturing performance testing process for ultra-fine round wire photovoltaic welding ribbons. The specific testing process steps are as follows: S1. First, take two sections of the ultra-fine round wire photovoltaic welding ribbon to be tested as test samples, and then take a section of standard sample. Subsequently, the ends of the standard sample and the two sections of the test sample are respectively installed on the end clamping elements at two corresponding positions from back to front, and the standard sample and the test sample are wound on the installation roller.

[0016] S2. Rotate the end clamping element and make the pressing element push the portion of the standard sample and the two sections of the test sample wound on the installation roller, so that the standard sample and the two sections of the test sample between the two installation rollers are in a straightened state.

[0017] S3. First, use two hydraulic cylinders to drive the two mounting rollers on the rear side to move outward until the standard sample breaks. Then stop the pulling action of the two hydraulic cylinders. Then, control the two hydraulic cylinders on the left and right sides of the middle position to drive the mounting rollers to move outward and move them to the same position as the mounting rollers on the rear side through the limit unit, thereby pulling the test sample in the middle position and observing whether it breaks.

[0018] S4. Finally, the bending element is controlled to bend the test sample on the front side. After the bending is completed, the hydraulic cylinders at the left and right positions on the front side are controlled to drive the installation rollers to move outward and move them to the same position as the installation rollers on the rear side through the limit unit, thereby pulling the test sample on the front side and observing whether it is broken.

[0019] The beneficial effects of the present invention are: 1. The present invention adopts the end clamping element to cooperate with the installation roller to stably clamp the photovoltaic welding ribbon test sample and the standard sample, and avoids the loosening of the two ends of the test sample and the standard sample during the subsequent stretching of the test sample and the standard sample, so that the test result is more accurate. At the same time, the limit groove cooperates with the end clamping element to ensure that the clamped test sample and standard sample are in a flat state, and pressing the test sample and standard sample by the pressing element can further ensure that the test sample and the standard sample are in a stably clamped state when pulled by the hydraulic cylinder.

[0020] 2. The present invention adopts a detection method of stretching and testing the tensile strength of a section of photovoltaic welding ribbon standard sample and two sections of photovoltaic welding ribbon test samples, so as to quickly evaluate the tensile strength of the photovoltaic welding ribbon to be tested according to the fracture situation of the test samples, and limit the contraction of the hydraulic cylinder through the limit unit, so that the contraction distance of the hydraulic cylinder is the same each time, so that the force used to pull the test sample each time is exactly the same, thereby increasing the accuracy of the test results.

[0021] 3. The present invention uses a pressing element to press the photovoltaic welding ribbon test sample and the standard sample so that both can fit in the installation roller and the limit groove. At the same time, the square elastic telescopic rod drives the arc pressure plate to continuously support the test sample and the standard sample at multiple points, which can avoid excessive clamping force and cause the test sample and the standard sample to break at the clamping position when pulled by the hydraulic cylinder, thereby ensuring the accuracy and effectiveness of the test results.

[0022] 4. The present invention uses a bending element to bend and rub the photovoltaic welding ribbon test sample at the front position multiple times, thereby simulating the situation that the actual photovoltaic welding ribbon test sample is subjected to multiple bending and friction during the connection process, thereby making the detection more practical, and the longitudinal bending structure cooperates with the semicircular block and the beam groove to bend the test sample in multiple directions, thereby making the detection more in line with the situation that the photovoltaic welding ribbon is bent in different directions during actual use, and can quickly bend the photovoltaic welding ribbon test sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and examples.

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the vertical plate, hydraulic cylinder, clamping unit and limiting unit in the present invention.

[0026] Figure 3 It is a structural schematic diagram of the clamping unit and the limiting unit in the present invention.

[0027] Figure 4 It is a partial structural diagram of the clamping unit in the present invention.

[0028] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0029] Figure 6 It is a partial cross-sectional view of the clamping unit in the present invention from the front.

[0030] Figure 7 It is a partial front view of the present invention.

[0031] Figure 8 It is a structural schematic diagram of the bending unit in the present invention.

[0032] In the figure: 1. Test base plate; 11. Vertical plate; 12. Hydraulic cylinder; 2. Clamping unit; 21. Fixed plate; 211. Connecting plate; 212. Mounting roller; 213. Limiting groove; 214. Synchronizing ring; 215. Positioning plate; 216. Coordination hole; 22. End clamping element; 221. Arc-shaped longitudinal plate; 222. Fixed clamping plate; 223. Positioning block; 224. Adjusting stud; 225. Moving clamping plate; 23. Pressing element; 231. Limiting rod; 232. Connecting rod; 233. Arc-shaped moving plate; 234. Arc-shaped pressing plate ; 235. Push block; 236. Bending rod; 237. Push block; 3. Limiting unit; 31. Outer block; 311. Embedded block; 312. Through rod; 313. Round plate; 314. Bending splint; 4. Bending unit; 41. Fixed block; 411. Mounting plate; 412. Front extension column; 42. Bending element; 421. Cylinder; 422. Horizontal slide rail; 423. Electric slider; 424. Semicircular block; 425. Beam slot; 426. Inclined plate; 427. Beam sleeve; 428. Push rod; 429. Push rod. DETAILED DESCRIPTION

[0033] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0034] See Figure 1-Figure 2 A manufacturing performance testing device for ultra-fine round wire photovoltaic welding ribbon includes a test base plate 1, vertical plates 11 are symmetrically fixed on the top of the test base plate 1, and two groups of hydraulic cylinders 12 are symmetrically installed on the opposite sides of the two vertical plates 11. Each group of hydraulic cylinders 12 consists of three hydraulic cylinders 12 that are linearly and evenly distributed. A clamping unit 2 is provided at the pushing end of each hydraulic cylinder 12, and a limiting unit 3 is commonly provided on the two adjacent clamping units 2 in front and behind. A bending unit 4 is provided between the two clamping units 2 on the top of the test base plate 1 and located on the front side.

[0035] The present invention clamps the photovoltaic welding ribbon standard sample and the test sample through the clamping unit 2, and pulls the photovoltaic welding ribbon sample from back to front in sequence through the hydraulic cylinder 12, thereby ensuring the same pulling force according to the same pulling distance, and then testing the tensile strength of the ultra-fine round wire photovoltaic weld to be tested, and the bending unit 4 can bend and rub the photovoltaic welding ribbon test sample multiple times, thereby simulating the multiple bending and friction during the actual use of the photovoltaic welding ribbon, thereby making the test results more practical and effective.

[0036] Specifically, first cut two equal-length test samples from the photovoltaic welding ribbon to be tested, and then take a standard sample of the same length, and then clamp and install the standard sample and the two test samples through the clamping unit 2 from back to front, and make the test sample and the standard sample in a straight state. Before straightening the test sample on the front side, it is necessary to control the bending unit 4 to rub and bend the test sample multiple times, and then drive the clamping unit 2 to stretch the test sample and the standard sample from back to front through the hydraulic cylinders 12 on the left and right sides. When stretching the standard sample, it is necessary to stretch until the standard sample breaks, and immediately stop the pulling action of the hydraulic cylinder 12, so that when the test sample is stretched, the limit unit 3 is used to ensure that the pulling distance and pulling force are the same each time. After the test sample and the standard sample are stretched, observe whether the test sample breaks, and the tensile strength of the test sample can be comprehensively evaluated.

[0037] See Figure 2-Figure 4 The clamping unit 2 includes a fixed plate 21 fixed to the pushing end of the hydraulic cylinder 12, and connecting plates 211 are symmetrically fixed on the front and rear sides of the fixed plate 21. A mounting roller 212 is commonly fixed to the end of the two connecting plates 211 away from the fixed plate 21, and a limiting groove 213 is provided on the mounting roller 212. A synchronous ring 214 is rotatably installed on the mounting roller 212 and located on the front and rear sides of the limiting groove 213. An end clamping element 22 is commonly installed between the two synchronous rings 214. A positioning structure is provided on the opposite sides of the two synchronous rings 214 and at the position of the end clamping element 22. A pressing element 23 is provided on the side of the mounting roller 212, which is driven by the synchronous ring 214 to stably clamp the welding strip.

[0038] The clamping unit 2 is used to clamp and position the photovoltaic welding strip test sample and the standard sample, and to keep the test sample and the standard sample in a straight state, so that the tensile force on the test sample is the same each time the test sample is stretched, and the test sample and the standard sample are first clamped at both ends by the corresponding left and right end clamping elements 22, and then the test sample and the standard sample are pressed and positioned by the pressing element 23. This not only ensures that the test sample and the standard sample are clamped stably during the stretching process, but also avoids excessive clamping force that causes breakage at the clamping position, thereby ensuring the validity and accuracy of the test results.

[0039] See Figure 4 and Figure 6The end clamping element 22 includes an arc-shaped longitudinal plate 221 fixed between the two synchronous rings 214, and a fixed splint 222 is installed on the circumferential side of the arc-shaped longitudinal plate 221, and a positioning block 223 is fixed on the side of the arc-shaped longitudinal plate 221 away from the mounting roller 212. An inner groove is jointly opened between the positioning block 223 and the arc-shaped longitudinal plate 221, and an adjusting stud 224 is rotatably installed on the side of the inner groove close to the fixed splint 222. A movable splint 225 is connected to the adjusting stud 224 and is located on the inner groove and is threadedly connected; the positioning structure includes a positioning plate 215 fixed to the side of the synchronous ring 214 away from the limiting groove 213, the positioning plate 215 corresponds to the position of the arc-shaped longitudinal plate 221, a positioning hole is opened in the middle position of the positioning plate 215, and a matching hole 216 for matching the positioning hole is opened on the side of the mounting roller 212, and a positioning pin is connected between the positioning hole and the matching hole 216 at the corresponding position.

[0040] The end clamping element 22 is used to clamp the two ends of the photovoltaic welding ribbon test sample and the standard sample, so as to cooperate with the installation roller 212 to stably clamp the test sample and the standard sample, and avoid the loosening of the two ends of the test sample and the standard sample during the subsequent stretching of the test sample and the standard sample. At the same time, the limiting groove 213 cooperates with the end clamping element 22 to ensure that the clamped test sample and standard sample are in a flat state.

[0041] Specifically, first, two sections of equal-length test samples are cut from the photovoltaic welding ribbon to be tested, and then a section of a standard sample of the same length is taken, and then the two ends of the standard sample are passed around the installation roller 212 from the bottom and placed on the fixed clamping plate 222, and the end of the standard sample is guided by the limit groove 213, so that the position of the end of the standard sample is straight, and then the adjustment screw 224 is controlled to drive the movable clamping plate 225 to move in the direction close to the fixed clamping plate 222 until the movable clamping plate 225 cooperates with the fixed clamping plate 222 to align the end of the standard sample. The head is clamped. After both ends of the standard sample are clamped, the inspection personnel synchronously rotate the two sets of synchronization rings 214 on the two installation rollers 212, so that the positioning holes coincide with the matching holes 216 on the top of the installation rollers 212, and then insert the positioning pins into the positioning holes and the matching holes 216, so that the positions of the synchronization rings 214, the fixed splint 222 and the movable splint 225 are fixed after the rotation is completed. At this time, the synchronization rings 214, the fixed splint 222 and the movable splint 225 make the standard sample in a straight state.

[0042] After the end clamping element 22 has straightened the standard sample, the two sections of the test sample are positioned and straightened in sequence according to the above installation steps. After the straightening is completed, the test sample and the standard sample will both contact the ends of the limiting groove 213 and be stuck in the limiting groove 213.

[0043] See Figure 4-Figure 6The pressing element 23 includes a limiting rod 231 symmetrically fixed on the side of the installation roller 212 in the front and rear directions. The angle between the limiting rod 231 and the hydraulic cylinder 12 is an acute angle. The two limiting rods 231 are slidably connected with a connecting rod 232. An arc-shaped movable plate 233 is connected between the two connecting rods 232. The arc-shaped movable plate 233 is provided with a pressing structure on the side close to the installation roller 212. The bottom of the two connecting rods 232 and the synchronous ring 214 are jointly connected with a pushing structure. The arc-shaped movable plate 233 is pushed by the pushing structure and the pressing structure presses the welding strip.

[0044] The pressing structure includes square elastic telescopic rods uniformly arranged circumferentially on the side of the arc-shaped movable plate 233 close to the mounting roller 212. The positions of all square elastic telescopic rods correspond to the positions of the limit slots 213, and the telescopic end of each square elastic telescopic rod is fixed with an arc-shaped pressing plate 234; the pushing structure includes a pushed block 235 fixed on the side of the connecting rod 232 away from the mounting roller 212, a bending rod 236 is fixed on the side of the synchronous ring 214, and a pushing block 237 is fixed on the end of the bending rod 236 close to the pushed block 235, and the sides of the pushed block 235 and the pushing block 237 are provided with matching slopes.

[0045] The pressing element 23 is used to press the photovoltaic welding strip test sample and the standard sample so that both can fit on the installation roller 212 and the limit groove 213, thereby further ensuring that the test sample and the standard sample are in a stable clamping state when pulled by the hydraulic cylinder 12. At the same time, the square elastic telescopic rod drives the arc pressure plate 234 to continuously provide multi-point support to the test sample and the standard sample, which can avoid excessive clamping force and cause the test sample and the standard sample to break at the clamping position when pulled by the hydraulic cylinder 12, thereby ensuring the accuracy and effectiveness of the test results. The limit rod 231, which forms an acute angle with the hydraulic cylinder 12, can ensure that the pressing position will not cause the photovoltaic welding strip to be excessively clamped and cause it to break during the test.

[0046] Specifically, when the tester rotates the two sets of synchronous rings 214 on the two mounting rollers 212 synchronously, the synchronous ring 214 will drive the pushing block 237 to move toward the pushed block 235 through the bending rod 236. When the pushed block 235 contacts the pushing block 237, the pushed block 235 will be pushed and drive the connecting rod 232 and the arc-shaped movable plate 233 to move synchronously toward the mounting roller 212, so that the arc-shaped pressure plate 234 presses the test sample and the standard sample, and presses the test sample and the standard sample to the position of the limit groove 213. At this time, the square elastic telescopic rod is in a contracted state, thereby further fixing the test sample and the standard sample through non-rigid pressure.

[0047] See Figure 7-Figure 8The bending unit 4 includes a fixed block 41 fixed on the top of the test base plate 1, a mounting plate 411 is fixed on the top of the test base plate 1 and located on the right rear side of the fixed block 41, a front extension column 412 is fixed on the top of the mounting plate 411, and a bending element 42 is symmetrically arranged at the bottom front end of the front extension column 412 and the top of the fixed block 41.

[0048] The bending element 42 includes a cylinder 421, a horizontal slide rail 422 is fixed to the pushing end of the cylinder 421, a semicircular block 424 is connected to the bottom of the horizontal slide rail 422 through an electric slider 423, a beam groove 425 is provided on the arc side of the semicircular block 424, and a longitudinal bending structure is provided on the side of the clamping unit 2 on the corresponding side of the horizontal slide rail 422; the longitudinal bending structure includes an inclined plate 426 fixed to the side of the clamping unit 2 on the corresponding side of the horizontal slide rail 422, and an elastic telescopic square rod is hinged at the bottom of the inclined plate 426. A torsion spring (not shown in the figure) is provided at the hinge position of the elastic telescopic square rod and the bottom of the inclined plate 426, a restraining sleeve 427 is fixed to the telescopic end of the elastic telescopic square rod, a push rod 428 is fixed to the side of the elastic telescopic square rod, and a pushing rod 429 for pushing the pushed rod 428 is fixed to the side of the electric slider 423, wherein the cylinder 421 in the bending element 42 on the front extension column 412 is fixedly connected to the lower end of the front extension column 412, and the cylinder 421 in the bending element 42 on the fixed block 41 is fixedly connected to the top of the fixed block 41.

[0049] The bending element 42 is used to bend and rub the photovoltaic welding ribbon test sample at the front position multiple times, thereby simulating the situation where the actual photovoltaic welding ribbon test sample is subjected to multiple bending and friction during the connection process, thereby making the test more practical, and the longitudinal bending structure cooperates with the semicircular block 424 and the bundle groove 425 to bend the test sample in multiple directions, thereby making the test more in line with the situation where the photovoltaic welding ribbon is bent in different directions during actual use.

[0050] Specifically, before straightening the test sample on the front side, first control the two cylinders 421 to move toward the test sample. At this time, the two semicircular blocks 424 will cooperate with the beam slot 425 to bend the unstraightened test sample until it is straightened. Then control the electric slider 423 to drive the semicircular block 424 to move back and forth left and right, so that the semicircular block 424 cooperates with the beam slot 425 to bend the test sample vertically.

[0051] When the two cylinders 421 drive the bending element 42 to move toward the test sample, the beam sleeve 427 will be put on the test sample. During the reciprocating movement of the semicircular block 424, the pushing rod 429 will contact the pushed rod 428 and push the pushed rod 428 backward, so that the beam sleeve 427 drives the test sample to bend longitudinally, and then bends the test sample in both vertical and longitudinal directions.

[0052] See Figure 2-Figure 3 The limiting unit 3 includes a jacket block 31 fixed at the front end of the fixed plate 21 located on the rear side of the two adjacent fixed plates 21. A positioning groove is provided in the jacket block 31. A limiting structure is provided in the jacket block 31 and at the position of the positioning groove. An embedded block 311 is fixed at the rear end of the fixed plate 21 located on the front side of the two adjacent fixed plates 21.

[0053] In this embodiment, if Figure 3 As shown, the limiting structure includes a penetrating rod 312 that is symmetrically inserted through the outer sleeve block 31 in the upper and lower directions. A circular plate 313 is fixed to the opposite ends of the two penetrating rods 312. A vertical spring is connected between the circular plate 313 and the outer sleeve block 31. A bending splint 314 is fixed to the opposite ends of the two penetrating rods 312. The bending splint 314 is composed of an inclined section and a longitudinal section.

[0054] The limiting unit 3 is used to limit the contraction of the hydraulic cylinder 12, so that the distance of contraction of the hydraulic cylinder 12 is the same each time, and the limiting structure can ensure the limiting effect of the limiting unit 3 on the contraction of the hydraulic cylinder 12. At the same time, it can ensure the overall stability of the four hydraulic cylinders 12 at the rear and middle positions after the contraction is completed, and ensure the accuracy of the restriction on the contraction of the hydraulic cylinder 12 at the front, thereby increasing the accuracy of detection.

[0055] Specifically, when the arc-shaped pressure plate 234 presses the photovoltaic welding ribbon test sample and the standard sample to the position of the limit groove 213, the two hydraulic cylinders 12 at the rear side are first controlled to synchronously pull the standard sample. At this time, the outer sleeve block 31 at the front end of the two fixed plates 21 at the rear side is separated from the inner embedded block 311 at the rear side of the two fixed plates 21 at the middle position. When the two hydraulic cylinders 12 at the rear side pull the standard sample apart, the hydraulic cylinder 12 is immediately controlled to stop contracting, and then the two hydraulic cylinders 12 at the middle position are controlled to synchronously pull the test sample at the middle position until the middle position is reached. When the outer sleeve 31 and the inner sleeve 31 are separated, the bending splint 314 will return to its original position due to the elastic force of the vertical spring. Then the inner sleeve 311 will press the inclined section of the bending splint 314 and press the bending splint 314 outward to stabilize the inner sleeve 311 and the outer sleeve 31. Then repeat the operation to drive the two hydraulic cylinders 12 on the front side and pull the test sample on the front side.

[0056] In addition, the present invention also provides a manufacturing performance testing process for ultra-fine round wire photovoltaic welding ribbons. The specific testing process steps are as follows: S1. First, take two sections of the ultra-fine round wire photovoltaic welding ribbon to be tested as test samples, and then take a section of standard sample. Subsequently, the ends of the standard sample and the two sections of the test sample are respectively installed from back to front on the end clamping elements 22 at two corresponding positions, and the standard sample and the test sample are wound on the installation roller 212.

[0057] S2. Rotate the end clamping element 22 and make the pressing element 23 push the parts of the standard sample and the two sections of the test sample wound on the installation roller 212, so that the standard sample and the two sections of the test sample between the two installation rollers 212 are in a stretched state. Before straightening the test sample on the front side, first control the two cylinders 421 to drive the bending element 42 to move toward the test sample. At this time, the two semicircular blocks 424 will cooperate with the beam slot 425 to bend the unstretched test sample until it is stretched straight. Then control the electric slider 423 to drive the semicircular block 424 to move back and forth left and right, so that the semicircular block 424 cooperates with the beam slot 425 to bend the test sample vertically.

[0058] When the two cylinders 421 drive the bending element 42 to move toward the test sample, the beam sleeve 427 will be put on the test sample. During the reciprocating movement of the semicircular block 424, the pushing rod 429 will contact the pushed rod 428 and push the pushed rod 428 backward, so that the beam sleeve 427 drives the test sample to bend longitudinally, and then bends the test sample in both vertical and longitudinal directions.

[0059] S3. First, the two installation rollers 212 on the rear side are driven to move outward by the two hydraulic cylinders 12 until the standard sample breaks, and then the pulling action of the two hydraulic cylinders 12 is stopped. Then, the two hydraulic cylinders 12 at the left and right positions in the middle position are controlled in turn to drive the installation rollers 212 to move outward and move them to the same position as the installation rollers 212 on the rear side through the limit unit 3, thereby pulling the test sample at the middle position and observing whether it breaks. If the test sample at the middle position breaks before the hydraulic cylinder 12 contracts to the same state as the hydraulic cylinder 12 on the rear side, it indicates that the tensile strength of the ultra-fine round wire photovoltaic welding ribbon to be tested does not meet the requirements, and there is no need to stretch the test sample on the front side. If the test sample at the middle position breaks when the hydraulic cylinder 12 contracts to the same state as the hydraulic cylinder 12 on the rear side, or the test sample does not break during the entire process, it indicates that the tensile strength of the ultra-fine round wire photovoltaic welding ribbon to be tested meets the requirements, and then the test sample on the front side is stretched.

[0060] S4. Finally, control the two hydraulic cylinders 12 on the left and right sides of the front side to drive the installation roller 212 to move outward and move it to the same position as the installation roller 212 on the rear side through the limit unit 3, thereby pulling the test sample on the front side and observing whether it is broken. If the test sample on the front side breaks before the hydraulic cylinder 12 shrinks to the same state as the hydraulic cylinder 12 on the rear side, it indicates that the tensile strength of the ultra-fine round wire photovoltaic welding ribbon to be tested does not meet the requirements after multiple bending. If the test sample on the front side breaks when the hydraulic cylinder 12 shrinks to the same state as the hydraulic cylinder 12 on the rear side, or the test sample does not break during the entire process, it indicates that the tensile strength of the ultra-fine round wire photovoltaic welding ribbon to be tested still meets the requirements after multiple bending.

[0061] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered by the scope of protection of the present invention.

Claims

1. An ultra-fine round wire photovoltaic welding ribbon manufacturing performance testing device, comprising a test base plate (1), a vertical plate (11) being fixed symmetrically on the top of the test base plate (1), characterized in that: Two groups of hydraulic cylinders (12) are symmetrically installed on opposite sides of the two vertical plates (11), and each group of hydraulic cylinders (12) is linearly and evenly distributed. A clamping unit (2) is provided at the pushing end of each hydraulic cylinder (12), and a limiting unit (3) is commonly provided on two adjacent clamping units (2) in front and behind. A bending unit (4) is provided between the two clamping units (2) located at the top of the test base plate (1) and on the front side. The clamping unit (2) comprises a fixed plate (21) fixed to the pushing end of the hydraulic cylinder (12), connecting plates (211) are symmetrically fixed to the front and rear sides of the fixed plate (21), a mounting roller (212) is fixed to one end of the two connecting plates (211) away from the fixed plate (21), a limiting groove (213) is provided on the mounting roller (212), a synchronization ring (214) is rotatably installed on the mounting roller (212) and located on both sides of the limiting groove (213), an end clamping element (22) is installed between the two synchronization rings (214), a positioning structure is provided on the opposite sides of the two synchronization rings (214) and at the position corresponding to the end clamping element (22), and a pressing element (23) is provided on the side of the mounting roller (212) and is driven by the synchronization ring (214) to stably clamp the welding strip; The limiting unit (3) is used to limit the contraction of the hydraulic cylinder (12), so that the hydraulic cylinder (12) contracts by the same distance each time; the bending unit (4) comprises a fixing block (41) fixed to the top of the test base plate (1); a mounting plate (411) is fixed to the top of the test base plate (1) and located on the right rear side of the fixing block (41); a front extension column (412) is fixed to the top of the mounting plate (411); and a bending element (42) is symmetrically provided at the front end bottom of the front extension column (412) and the top of the fixing block (41); The pressing element (23) comprises a limiting rod (231) symmetrically fixed on the side of the installation roller (212) in front and back directions, the angle between the limiting rod (231) and the hydraulic cylinder (12) is an acute angle, the two limiting rods (231) are both slidably connected with a connecting rod (232), an arc-shaped movable plate (233) is connected between the two connecting rods (232), a pressing structure is provided on the side of the arc-shaped movable plate (233) close to the installation roller (212), and a pushing structure is commonly connected to the bottom of the two connecting rods (232) and the synchronous ring (214), and the arc-shaped movable plate (233) is pushed by the pushing structure and the pressing structure presses the welding strip, thereby pressing the welding strip to the position of the limiting groove (213).

2. The ultra-fine round wire photovoltaic ribbon manufacturing performance testing equipment according to claim 1, characterized in that: The end clamping element (22) includes an arc-shaped longitudinal plate (221) fixed between two synchronous rings (214), a fixed clamping plate (222) is installed on the side of the arc-shaped longitudinal plate (221) along the circumferential direction, a positioning block (223) is fixed on the side of the arc-shaped longitudinal plate (221) away from the installation roller (212), an inner groove is jointly provided between the positioning block (223) and the arc-shaped longitudinal plate (221), an adjusting stud (224) is rotatably installed on the side of the inner groove close to the fixed clamping plate (222), and a movable clamping plate (225) is threadedly connected to the adjusting stud (224) and located in the inner groove.

3. The ultra-fine round wire photovoltaic ribbon manufacturing performance testing equipment according to claim 2, characterized in that: The positioning structure includes a positioning plate (215) fixed on the side of the synchronization ring (214) away from the limiting groove (213), the positioning plate (215) corresponds to the position of the arc-shaped longitudinal plate (221), a positioning hole is opened in the middle position of the positioning plate (215), a matching hole (216) for matching the positioning hole is opened on the side of the installation roller (212), and a positioning pin is connected between the positioning hole and the matching hole (216) at the corresponding position.

4. The ultra-fine round wire photovoltaic ribbon manufacturing performance testing equipment according to claim 1, characterized in that: The pressing structure comprises square elastic telescopic rods uniformly arranged circumferentially on the side of the arc-shaped movable plate (233) close to the installation roller (212); the positions of all the square elastic telescopic rods correspond to the positions of the limiting grooves (213); and a curved pressing plate (234) is fixed to the telescopic end of each square elastic telescopic rod.

5. The ultra-fine round wire photovoltaic ribbon manufacturing performance testing equipment according to claim 1, characterized in that: The pushing structure comprises a pushed block (235) fixed on the side away from the installation roller (212), a bending rod (236) fixed on the side of the synchronization ring (214), a pushing block (237) fixed on one end of the bending rod (236) close to the pushed block (235), and matching slopes are provided on the sides of the pushed block (235) and the pushing block (237).

6. The ultra-fine round wire photovoltaic ribbon manufacturing performance testing equipment according to claim 1, characterized in that: The limiting unit (3) comprises a jacket block (31) fixed to the front end of the fixing plate (21) located at the rear side of the two adjacent fixing plates (21); a positioning groove is provided in the jacket block (31); a limiting structure is provided in the jacket block (31) and at the position of the positioning groove; and an embedded block (311) is fixed to the rear end of the fixing plate (21) located at the front side of the two adjacent fixing plates (21).

7. The ultra-fine round wire photovoltaic ribbon manufacturing performance testing equipment according to claim 1, characterized in that: The bending element (42) includes a cylinder (421), a horizontal slide rail (422) is fixed to the pushing end of the cylinder (421), a semicircular block (424) is connected to the bottom of the horizontal slide rail (422) through an electric slider (423), a beam slot (425) is provided on the arc-shaped side of the semicircular block (424), and a longitudinal bending structure is provided on the side of the clamping unit (2) close to the corresponding side of the horizontal slide rail (422), wherein the cylinder (421) in the bending element (42) on the front extension column (412) is fixedly connected to the lower end of the front extension column (412), and the cylinder (421) in the bending element (42) on the fixed block (41) is fixedly connected to the top of the fixed block (41).

8. The ultra-fine round wire photovoltaic ribbon manufacturing performance testing equipment according to claim 7, characterized in that: The longitudinal bending structure comprises an inclined plate (426) fixed on the side of the clamping unit (2) near the corresponding side of the horizontal slide rail (422); an elastic telescopic square rod is hinged at the bottom of the inclined plate (426); a torsion spring is provided at the hinge position between the elastic telescopic square rod and the bottom of the inclined plate (426); a restraining sleeve (427) is fixed to the telescopic end of the elastic telescopic square rod; a push rod (428) is fixed to the side of the elastic telescopic square rod; and a pushing rod (429) for pushing the pushed rod (428) is fixed to the side of the electric slider (423).

9. A process for testing the manufacturing performance of an ultra-fine round photovoltaic ribbon, which is accomplished by using the ultra-fine round photovoltaic ribbon manufacturing performance testing equipment according to any one of claims 1 to 8, characterized in that: The specific detection process steps are as follows: S1, first take two sections of the ultra-fine round wire photovoltaic welding ribbon to be tested as test samples, then take a section of standard sample, then install the ends of the standard sample and the two sections of the test sample on two corresponding end clamping elements (22) in sequence from back to front, and make the standard sample and the test sample be wound on the installation roller (212); S2, rotating the end clamping element (22) and causing the pressing element (23) to push the portion of the standard sample and the two sections of the test sample wound on the installation roller (212), thereby causing the standard sample and the two sections of the test sample between the two installation rollers (212) to be in a straightened state, and before straightening the test sample on the front side, first controlling the bending element (42) to bend the test sample on the front side; S3, first, the two mounting rollers (212) at the rear side are driven to move outward by the two hydraulic cylinders (12) until the standard sample breaks, then the pulling action of the two hydraulic cylinders (12) is stopped, and then the two hydraulic cylinders (12) at the left and right positions in the middle position are controlled in sequence to drive the mounting rollers (212) to move outward and move to the same position as the mounting rollers (212) at the rear side through the limiting unit (3), thereby pulling the test sample at the middle position and observing whether it breaks; S4. Finally, the two hydraulic cylinders (12) at the left and right positions on the front side are controlled to drive the installation roller (212) to move outward and move to the same position as the installation roller (212) on the rear side through the limit unit (3), thereby pulling the test sample on the front side and observing whether it is broken.

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