A high-precision clamping device for transporting photovoltaic welding ribbons and a method of using the same

Abstract

The present invention discloses a high-precision clamping device for transporting photovoltaic welding strips and a method of using the device, which relates to the technical field of photovoltaic production equipment, and includes a first mounting plate and a fourth mounting plate that are slidably connected, a plurality of fixed clamping jaws are connected below the first mounting plate, a plurality of movable clamping jaws that cooperate with the fixed clamping jaws are connected below the fourth mounting plate, the fixed clamping jaws and the movable clamping jaws correspond to each other one by one, the ends of the opposite surfaces of the fixed clamping jaws and the movable clamping jaws are provided with an inclined section and a straight section for guiding the welding strip, a pressure block connected to a needle-type cylinder is provided above the inclined section and the straight section, the output direction of the needle-type cylinder is parallel to the length direction of the straight section, and an active power element for controlling the movable clamping jaw is provided next to the fourth mounting plate. Compared with the traditional device, the present invention has a streamlined structure, can be applied to a circulation structure, has low debugging difficulty, high production capacity, streamlined and reliable equipment, and high precision in grabbing and placing the battery cell welding strips.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic production equipment, and in particular to a high-precision clamping device for transporting photovoltaic welding ribbons and a use method thereof. Background Art

[0002] The Earth is the only home for human survival. Human beings need to accelerate the formation of green development and lifestyle, build ecological civilization and a beautiful Earth, and respond to climate change. The Paris Agreement represents the general direction of global green and low-carbon transformation and is the minimum action needed to protect the Earth's home. To this end, China will increase its national independent contribution and adopt more powerful policies and measures to strive to peak carbon dioxide emissions before 2030 and achieve carbon neutrality before 2060. In order to achieve the goals of carbon peak and carbon neutrality as soon as possible, it is urgent to develop sustainable green energy. Clean energy represented by wind power, photovoltaics and hydropower has become the main force in this energy conservation and emission reduction. In particular, photovoltaics, which are relatively simple in technical route, are not restricted by geographical regions, and have a wide range of applications, have been widely recognized by various industries. Therefore, the photovoltaic industry has also ushered in vigorous development, and many technologies have undergone disruptive changes. In this wave of photovoltaic revolution, TOPCON cells and heterojunction cells (HJT) have become the vane of the development of the photovoltaic industry due to their more efficient battery conversion efficiency and low attenuation characteristics. Compared with conventional batteries, although TOPCON cells and heterojunction cells (HJT) have outstanding advantages, the cost of battery cells is relatively high, which has become the main obstacle to their development. Therefore, in order to adapt to the rapid development needs of the photovoltaic industry, it is very important to save the manufacturing cost of battery cells. In the manufacturing cost of battery cells, the paste accounts for about 24%, second only to the silicon wafer itself, so it is very important to save the consumption of silver paste in the battery cells during the cost reduction process. With the increasing number of battery cell main grids, this requires the battery cell main grid to be printed thinner and thinner to reduce the consumption of silver paste. The production of photovoltaic modules must first lay welding strips on the front and back main grids of the battery cells, connect the positive and negative electrodes between the battery cells with welding strips, and lay a string of several pieces into a string of battery strings after welding. Then connect the positive and negative electrodes of several battery strings in series to form a module, and then form a finished module on the market after packaging. The photovoltaic string welding machine is a device that connects the positive and negative poles of the battery cell in series. As the battery cell main grid becomes thinner and thinner, the photovoltaic welding ribbon is also getting thinner and thinner. At present, the diameter of the photovoltaic welding ribbon is about 0.30mm, which requires the equipment to have higher and higher precision. The equipment needs to accurately grab, transport and place the welding ribbon on the welding platform, and then use the visual positioning robot to place the battery cell on top of the welding ribbon. The overlap between the center of the welding ribbon and the center of the battery cell main grid is required to have a deviation of no more than 0.05mm. Otherwise, the deviation of the welding ribbon from the silver paste of the battery cell main grid will cause cold welding, and the yield of the produced battery string will be too low, which is not suitable for mass production.

[0003] There are two main ways to place battery cells and solder strips on the market: the first way is that the module places the cut solder strips along the direction of the solder strips through the solder strip grooves on the belt or reciprocating fixture, and then places the battery cells at a fixed point to press the solder strips, the belt or fixture steps forward, and then places the solder strips and battery cells in a circular manner; the second way is to place the cut solder strips on the positioned soldering table fixture through the positioning hooks, and then place the battery cells at a fixed point, step forward in sequence, and then place the solder strips and battery cells in a circular manner until a string is full, stop placing the solder strips and battery cells, and after a string of welding and unloading is completed, enter the next string and re-place the solder strips and battery cells. The second hook method requires the coordination of the hook and the soldering table fixture, and both the hook and the soldering table fixture must have positioning grooves to achieve accurate placement of the solder strips and battery cells. The first method has a simple structure but poor accuracy, mainly because the soldering ribbon is not positioned on the belt or the positioning groove is too wide, making it impossible to accurately position it. In addition, the soldering ribbon is not positioned when it falls off the clamp of the wire pulling module, which will cause offset; and in the process of the belt or jig stepping forward, since the soldering ribbon is not positioned, although it is pressed by the battery cell, it will also slide relative to it, causing a large offset, which will in turn cause cold soldering. The first method is only suitable for conventional battery cells with a wider main grid. Even if the soldering ribbon is offset by 0.5-1mm, it can be overlapped to form an effective weld. It is not applicable to battery cells with thin main grids. The second method, because the hooks and the soldering table for transporting the soldering ribbon have positioning grooves, the soldering ribbon can be transported and placed at a fixed point with high precision. However, due to the high-precision requirements, the precision requirements for the coordination of the hooks and the soldering table jig are very high, and grooves must be opened on the soldering table jig to avoid There are strict requirements on the thickness of the hook and the soldering station fixture. The groove and the position of the soldering strip are fixed, and the position of the hook holding the soldering strip must also be fixed. This greatly increases the difficulty in the process of debugging the equipment. The placement of the soldering strip requires the module to have an additional hook-in and hook-out action, which will increase the cycle time. Moreover, only a single string can be placed, welded, and unloaded to complete the entire action before the next string can be carried out. It is a reciprocating action with a long cycle time. The production capacity of a single track is only about 50% of the production capacity of a conventional single-belt equipment. If you want to increase the production capacity, you can only increase the reciprocating track, but the size of the equipment will become larger and larger, which brings great difficulties to processing, assembly and debugging. Therefore, on the whole, the second method has high precision, but great limitations. The hook and the soldering station fixture must be precisely matched and can only be used in a reciprocating structure, not in a circulating structure. The debugging is difficult, the production capacity is low, and the equipment is very complicated. Summary of the invention

[0004] In view of the technical problem that the existing technical solutions for placing battery cells and welding strips cannot take into account the streamlined structure, production capacity and grasping and placing accuracy, the present invention provides a high-precision clamping device and a method of use for transporting photovoltaic welding strips. Compared with traditional devices, it has a streamlined structure, can be applied to a circulation structure, has low debugging difficulty, high production capacity, streamlined and reliable equipment, and has high accuracy in grasping and placing battery cell welding strips.

[0005] Technical Solution

[0006] To solve the above problems, the technical solution provided by the present invention is:

[0007] A high-precision clamping device for transporting photovoltaic welding strips, comprising a first mounting plate and a fourth mounting plate that are slidably connected, a plurality of fixed clamps are connected below the first mounting plate, a plurality of movable clamps that cooperate with the fixed clamps are connected below the fourth mounting plate, the fixed clamps and the movable clamps correspond one to one, and the ends of the opposite surfaces of the fixed clamps and the movable clamps are provided with an inclined section and a straight section for guiding the welding strip, a pressure block connected to a needle-type cylinder is provided above the inclined section and the straight section, the output direction of the needle-type cylinder is parallel to the length direction of the straight section, and an active power element for controlling the movable clamp is provided next to the fourth mounting plate.

[0008] Optionally, the movable power element includes a blocking cylinder and a clamping cylinder, the output end of the clamping cylinder is connected to a third mounting plate, a plurality of movable clamps are fixedly connected below the third mounting plate, the output end of the blocking cylinder is connected to a blocking adjustment bolt, the third mounting plate is opposite to the blocking adjustment bolt, and the output directions of the blocking cylinder and the clamping cylinder are parallel.

[0009] As an option, the movable jaws are evenly arranged.

[0010] Optionally, the third mounting plate is slidably connected to the first mounting plate, and a sliding direction of the third mounting plate is parallel to an output direction of the blocking cylinder and the clamping cylinder.

[0011] Optionally, a sixth mounting plate is connected to the first mounting plate via a downward pressure cylinder, and a plurality of flexible pressure plates corresponding to the straight surface sections are provided below the sixth mounting plate.

[0012] Optionally, the sixth mounting plate is elastically limitedly connected to the first mounting plate, the sixth mounting plate is connected to the first mounting plate via a guide shaft and an elastic element, and a fixing ring and an adjustment block for limiting are provided at the end of the guide shaft.

[0013] Optionally, the first mounting plate is fixedly connected to a fifth mounting plate, and the fifth mounting plate is provided with a buffer that cooperates with the fourth mounting plate.

[0014] Optionally, the lower end of the pressing block is provided with an I-shaped bottom end surface, and the cross-sectional shape of the pressing block is I-shaped.

[0015] Optionally, the length of the I-shaped bottom end surface is greater than the maximum distance between the fixed clamping jaw and the movable clamping jaw.

[0016] A method for using a high-precision clamping device for transporting a photovoltaic welding ribbon, using the high-precision clamping device for transporting a photovoltaic welding ribbon, characterized in that it includes the following steps:

[0017] 1. Process of taking welding strips: (1) In the initial state, multiple welding strips are stretched and straightened, and both ends of the welding strips are pressed and in a straightened state. The blocking cylinder, clamping cylinder, needle cylinder and pressing cylinder are all in a retracted state. At this time, the spacing between the movable clamping jaw and the fixed clamping jaw is greater than the diameter of the welding strip. According to the diameter of the wire, the clamping floating joint is appropriately adjusted to adjust the initial spacing; (2) The horizontal transport module moves the clamping jaw device to the vicinity of the welding strip. At this time, the distance between the center of the welding strip and the fixed clamping jaw in the horizontal direction is controlled to be half of the diameter of the welding strip. Then the vertical lifting module is lowered to the wire taking position, and then the clamping cylinder extends to push the movable clamping jaw to move, and the movable clamping jaw is tightly attached to the fixed clamping jaw; (3) Then the needle cylinder extends, and the pressure block presses the welding strip along the inclined section into the groove formed by the movable clamping jaw and the fixed clamping jaw;

[0018] 2. Process of placing the welding strip: (1) The blocking cylinder extends and the clamping cylinder retracts. At this time, the movable jaw opens and hits the blocking adjustment screw. At this time, the distance between the movable jaw and the fixed jaw is larger than the diameter of the welding strip. The size of the opening is appropriately adjusted by the blocking adjustment screw. While the movable jaw opens, the needle cylinder pushes the pressure block downward. The width of the middle part of the I-shaped bottom end face of the pressure block is smaller than the diameter of the welding strip, which just presses the welding strip into the welding strip groove of the welding platform along the straight section. The fixed jaw, movable jaw and pressure block form a stable guide to prevent the welding strip from deviating; (2) The downward pressure cylinder extends, driving the pressure plate to press down, assisting the welding strip to enter the groove accurately, and then the downward pressure cylinder is cut off and retracted under the action of the elastic element. Then the needle cylinder is cut off and retracted, and the blocking cylinder is cut off and retracted. Beneficial Effects

[0019] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0020] The technical solution provided by the present invention adopts a clamping structure in which a fixed clamping jaw and a movable clamping jaw cooperate, and there is no need for a hooking claw to retract. Compared with the reciprocating structure of the hooking claw, the present solution can be applied to a circulating structure, which greatly improves the production capacity. At the same time, the movable power elements of the fixed clamping jaw and the movable clamping jaw are integrated, and the structure is streamlined, the debugging difficulty is low, the equipment is streamlined and reliable, and the inclined surface section and the straight surface section for guiding the welding strip between the fixed clamping jaw and the movable clamping jaw are designed, and the accuracy of grabbing and placing the welding strip is high; further, a blocking cylinder and a clamping cylinder that can cooperate with the callback are provided to accurately control the distance between the fixed clamping jaw and the movable clamping jaw, and improve the accuracy of grabbing and placing the welding strip; further, a flexible pressure plate is provided, and the welding strip that does not fit the groove or the welding strip that is not offset can be further pressed into the welding strip groove of the welding platform, so as to better assist the welding strip to enter the groove accurately and improve the effect of the welding strip entering the groove; further, a pressing block is provided, and the welding strip can be pressed on three sides when clamping the welding strip, which is more stable, and the welding strip can be pressed down to enter the groove when placing the welding strip, so as to improve the effect of the welding strip entering the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a clamping mechanism of a high-precision clamping device for transporting photovoltaic welding ribbons proposed in an embodiment of the present invention.

[0022] Figure 2 This is one of the cross-sectional views of a high-precision clamping device for handling photovoltaic welding ribbons proposed in an embodiment of the present invention.

[0023] Figure 3 This is a second cross-sectional view of a high-precision clamping device for handling photovoltaic welding ribbons proposed in an embodiment of the present invention.

[0024] Figure 4 A schematic diagram of the clamping action of a high-precision clamping device for transporting photovoltaic welding ribbons proposed in an embodiment of the present invention.

[0025] Figure 5 This is an enlarged view of the ends of a fixed jaw and a movable jaw of a high-precision clamping device for handling photovoltaic welding ribbons proposed in an embodiment of the present invention.

[0026] Figure 6 A schematic diagram of the structure of a pressing block of a high-precision clamping device for transporting photovoltaic welding ribbons proposed in an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of the overall structure of a high-precision clamping device for transporting photovoltaic welding ribbons proposed in an embodiment of the present invention.

[0028] Figure 8 A schematic structural diagram of a line splitting mechanism of a high-precision clamping device for transporting photovoltaic welding ribbons proposed in an embodiment of the present invention.

[0029] 100, branching mechanism; 101, guide rail mounting plate; 102, branching cylinder; 103, branching joint; 104, branching connecting plate; 105, adjusting bolt; 106, branching guide rail; 107, branching slider; 108, branching floating joint; 109, slider limit seat; 110, limit bolt; 111, slider mounting plate; 112, magnetic switch; 200, clamping claw mechanism; 201, first joint; 202, first mounting plate; 203, second mounting plate; 204, second joint; 205, blocking cylinder; 206, clamping cylinder; 207, clamping floating joint; 208, third mounting plate; 209, welding strip; 2 10. Needle cylinder; 211. Pressure block; 212. Fixed jaw; 213. Movable jaw; 214. Block adjustment bolt; 215. Fixed ring; 216. Guide shaft; 217. Fourth mounting plate; 218. Pressure plate; 219. Jaw guide rail; 220. Jaw slider; 221. Positioning pin; 222. Buffer; 223. Fifth mounting plate; 224. Linear bearing; 225. Buffer block; 226. Sealing ring; 227. Pressing cylinder; 228. Adjusting block; 229. Elastic element; 230. Inclined section; 231. Straight section; 232. Sixth mounting plate; 233. I-shaped bottom end surface; 300. Welding platform. DETAILED DESCRIPTION

[0030] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0031] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the invention are shown in the accompanying drawings. The words "first", "second", etc. described in the present invention are set for the convenience of describing the technical solution of the present invention, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present invention. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradictions or conflicts, all of which are within the scope of protection required by the present invention. Example

[0032] Combined with Figure 1-8 A high-precision clamping device for transporting photovoltaic welding strips, comprising a first mounting plate 202 and a fourth mounting plate 217 that are slidably connected, a plurality of fixed clamps 212 are connected below the first mounting plate 202, a plurality of movable clamps 213 that cooperate with the fixed clamps 212 are connected below the fourth mounting plate 217, the fixed clamps 212 and the movable clamps 213 correspond to each other one by one, and the ends of the opposite surfaces of the fixed clamps 212 and the movable clamps 213 are provided with an inclined surface section 230 and a straight surface section 231 for guiding the welding strip 209, a pressing block 211 connected to a needle-type cylinder 210 is provided above the inclined surface section 230 and the straight surface section 231, the output direction of the needle-type cylinder 210 is parallel to the length direction of the straight surface section 231, and an active power element for controlling the movable clamp 213 is provided next to the fourth mounting plate 217.

[0033] The first mounting plate 202 is the reference component of the clamping device, and the other components are connected to the first mounting plate 202 or inside the first mounting plate 202. The fixed clamping jaw 212 is connected to the first mounting plate 202 and is fixed during the operation of the clamping device. The movable clamping jaw 213 cooperates with the fixed clamping jaw 212 to clamp the welding strip 209. The movable clamping jaw 213 and the fixed clamping jaw 212 are matched one by one. Multiple movable clamping jaws 213 and fixed clamping jaws 212 can clamp multiple welding strips 209 at the same time, thereby improving production capacity. Figure 2 and 5 As shown, the soldering strip contact surface of the fixed jaw 212 is a straight surface, the upper part of the soldering strip contact surface of the movable jaw 213 is an inclined surface section 230, and the lower part is a straight surface section 231. The straight surface section 231 and the soldering strip contact surface of the fixed jaw 212 fit together when clamping the soldering strip 209. The soldering strip 209 is located in the V-shaped groove formed by the inclined surface section 230 and the soldering strip contact surface of the fixed jaw 212, and the pressing block 211 presses the soldering strip 209 downward to form a three-sided clamp, thereby improving the clamping stability of the soldering strip 209. When the pressing block 211 presses the welding strip 209 downward, the inclined surface section 230 plays a guiding role, so that the welding strip 209 is located at the connection between the straight surface section 231 and the inclined surface section 230. Once the movable clamp 213 and the fixed clamp 212 begin to loosen and place the welding strip 209, the welding strip 209 can quickly and stably move downward from the welding strip contact surface between the straight surface section 231 and the fixed clamp 212, which greatly improves the placement accuracy of the welding strip 209. In this embodiment, the needle cylinder 210 is embedded in the first mounting plate 202 to control the downward movement of the pressing block 211. A reset spring for rebounding the pressing block 211 is provided inside the needle cylinder 210. When the needle cylinder 210 is de-energized, the pressing block 211 will rebound to a high position. When the needle cylinder 210 is inflated, the pressing block 211 moves downward. The output direction of the needle cylinder 210 is parallel to the length direction of the straight section 231, so as to prevent the welding strip 209 from being squeezed by the pressure block 211 in an oblique direction, reduce the generation of invalid force, and prevent the welding strip 209 from being squeezed and deformed. The movable power element controls the movement of the movable clamp 213.

[0034] The movable power element includes a blocking cylinder 205 and a clamping cylinder 206. The output end of the clamping cylinder 206 is connected to a third mounting plate 208. A plurality of movable clamping jaws 213 are fixedly connected below the third mounting plate 208. The output end of the blocking cylinder 205 is connected to a blocking adjustment bolt 214. The third mounting plate 208 is opposite to the blocking adjustment bolt 214. The output directions of the blocking cylinder 205 and the clamping cylinder 206 are parallel. The movement of the movable clamping jaw 213 requires high precision. The setting of the blocking cylinder 205 and the clamping cylinder 206 double cylinders can achieve higher precision when only the cylinders are used. After inflation, the clamping cylinder 206 is responsible for pushing out (extending) the third mounting plate 208 and the movable clamping jaw 213. Figure 2As shown, the movable jaw 213 is close to the fixed jaw 212. The blocking adjustment bolt 214 connected to the blocking cylinder 205 is pushed out (extended) after the blocking cylinder 205 is inflated, and interferes with or collides with the third mounting plate 208 at the end of the stroke, thereby avoiding the third mounting plate 208 and the movable jaw 213 from being too far, thereby achieving a higher precision. At this time, the distance between the movable jaw 213 and the fixed jaw 212 is 0.1 mm larger than the diameter of the welding strip 209. The movable jaws 213 are evenly arranged, which can save space while avoiding interference. The output end of the clamping cylinder 206 is connected to the third mounting plate 208 through the clamping floating joint 207.

[0035] The third mounting plate 208 is slidably connected to the first mounting plate 202, and the sliding direction of the third mounting plate 208 is parallel to the output direction of the blocking cylinder 205 and the clamping cylinder 206. The third mounting plate 208 is provided with a movable clamping claw 213. Figure 2 and 3 As shown, the movable clamping jaw 213 and the third mounting plate 208 are movable left and right, and the output direction of the blocking cylinder 205 and the clamping cylinder 206 must also be extended and retracted left and right, so the sliding direction of the third mounting plate 208 must be parallel to the output direction of the blocking cylinder 205 and the clamping cylinder 206, so as to cooperate to realize the movement of the movable clamping jaw 213. The first mounting plate 202 is provided with a clamping jaw guide rail 219, and the third mounting plate 208 is provided with a clamping jaw slide block 220 that slides in cooperation with the clamping jaw guide rail 219, or the clamping jaw guide rail 219 and the clamping jaw slide block 220 can be interchanged. A positioning pin 221 is provided between the third mounting plate 208 and the first mounting plate 202.

[0036] The first mounting plate 202 is connected to a sixth mounting plate 232 via a downward pressure cylinder 227, and a plurality of flexible pressure plates 218 corresponding to the straight surface section 231 are provided below the sixth mounting plate 232. The pressure plate 218 is in the shape of a flexible suction cup, which can further press the welding strip 209 that does not fit the groove or the welding strip 209 that is not offset into the welding strip 209 groove of the welding platform 300, better assist the welding strip 209 to enter the groove accurately, and improve the effect of the welding strip 209 entering the groove.

[0037] The sixth mounting plate 232 is elastically limited and connected to the first mounting plate 202. The sixth mounting plate 232 is connected to the first mounting plate 202 via a guide shaft 216 and an elastic element 229. The end of the guide shaft 216 is provided with a fixing ring 215 and an adjustment block 228 for limiting. Figure 3As shown, the guide shaft 216 is placed vertically, and the movement track of the sixth mounting plate 232 and the pressure plate 218 is in the vertical direction. A linear bearing 224 is provided between the guide shaft 216 and the first mounting plate 202 to facilitate the vertical movement of the guide shaft 216 in the first mounting plate 202. The elastic element 229 connects the linear bearing 224 and the fixing ring 215. The fixing ring 215 is used for limiting. The adjustment block 228 is actually a bolt. The adjustment block 228 is used to limit the fixed block. The different spiral depths of the adjustment block 228 can adjust the height of the fixed block, thereby adjusting the height of the pressure plate 218 to better adapt to the welding platform or belt device. A buffer block 225 is provided between the fixing ring 215 and the first mounting plate 202. The buffer block 225 is sleeved on the guide shaft 216 and locked on the first mounting plate 202.

[0038] The first mounting plate 202 is fixedly connected to a fifth mounting plate 223, and a buffer 222 is provided on the fifth mounting plate 223 to cooperate with the fourth mounting plate 217. The buffer 222 is installed on the fifth mounting plate 223, mainly to buffer the impact force of the fourth mounting plate 217 and the movable clamping claw 213, and play a role of buffering and shock absorption.

[0039] The lower end of the pressing block 211 is provided with an I-shaped bottom end surface 233, and the cross-sectional shape of the pressing block 211 is an I-shaped bottom end surface. Figure 6 As shown, the 3D shape of the pressing block 211 is shown in the figure, the I-shaped bottom end surface 233 is located at the end of the pressing block 211, and the I-shaped bottom end surface 233 cooperates with the ends of the fixed clamping jaw 212 and the movable clamping jaw 213 to clamp the welding strip 209. Figure 4 As shown, Figure 4 From an upward viewing angle, the matching relationship between the pressing block 211, the fixed jaw 212 and the movable jaw 213 can be clearly seen. Since the fixed jaw 212 and the movable jaw 213 have a certain width and volume, the width of the end of the pressing block 211 is set to be wider than the width of the fixed jaw 212 and the movable jaw 213. The fixed jaw 212 and the movable jaw 213 are pressed down from the outside, and the middle part of the I-shaped bottom end surface 233 passes through the gap between the fixed jaw 212 and the movable jaw 213. When placing the welding strip 209, the movable jaw 213 is released, the pressing block 211 is pressed down, and the welding strip 209 is pressed into the welding strip groove of the welding platform 300 or the belt through the gap between the fixed jaw 212 and the movable jaw 213.

[0040] The length of the I-shaped bottom end surface 233 is greater than the maximum distance between the fixed clamping jaw 212 and the movable clamping jaw 213. Figure 4 As shown, the length here refers to the length in the left-right direction of the figure, which is greater than the maximum distance between the fixed jaw 212 and the movable jaw 213. In this way, no matter where the welding strip 209 is located between the fixed jaw 212 and the movable jaw 213, it can be contacted and pressed down by the pressing block 211, thereby improving the fault tolerance of the pressing block 211.

[0041] A method for using a high-precision clamping device for transporting a photovoltaic welding ribbon, using the high-precision clamping device for transporting a photovoltaic welding ribbon, in this embodiment, adding actions between the process of taking the welding ribbon 209 and the process of placing the welding ribbon 209 and after the process of placing the welding ribbon 209, including the following steps:

[0042] 1. Process of taking welding strips: (1) In the initial state, the multiple welding strips 209 are stretched and straightened, and the two ends of the welding strips 209 are pressed and straightened. The blocking cylinder 205, the clamping cylinder 206, the needle cylinder and the pressing cylinder 227 are all in the retracted state. At this time, the spacing between the movable clamping jaw 213 and the fixed clamping jaw 212 is larger than the diameter of the welding strip 209. According to the diameter of the wire, the clamping floating joint 207 is appropriately adjusted to adjust the initial spacing; (2) The horizontal transport module moves the clamping jaw device to the horizontal transport module. When the welding strip 209 is reached, the distance between the center of the welding strip 209 and the fixed clamping jaw 212 in the horizontal direction is controlled to be half of the diameter of the welding strip 209. Then the vertical lifting module is lowered to the wire taking position. Then the clamping cylinder 206 extends to push the movable clamping jaw 213 to move. The movable clamping jaw 213 is tightly attached to the fixed clamping jaw 212. (3) Then the needle cylinder 210 extends, and the pressing block 211 presses the welding strip 209 along the inclined surface section 230 into the groove formed by the movable clamping jaw 213 and the fixed clamping jaw 212.

[0043] 2. Transportation process:

[0044] (1) The horizontal transport module moves to the unloading position of the welding platform 300. At this time, the center of the welding strip 209 coincides with the center of the welding strip positioning groove on the welding platform 300 in the vertical direction. During the horizontal transport process, the line dividing cylinder 102 extends to the line dividing position, and then the vertical lifting module descends to a position at a certain distance from the welding platform 300 and stops. The certain distance is 0.1-0.2mm, which can be 0.1mm, 0.15mm or 0.2mm. The transport process is completed;

[0045] 3. Process of placing the welding strip: (1) The blocking cylinder 205 extends and the clamping cylinder 206 retracts. At this time, the movable jaw 213 opens and touches the blocking adjustment bolt 214. At this time, the distance between the movable jaw 213 and the fixed jaw 212 is larger than the diameter of the welding strip 209. The size of the opening is appropriately adjusted by the blocking adjustment bolt 214. When the movable jaw 213 opens, the needle cylinder pushes the pressing block 211 downward. The width of the middle part of the I-shaped bottom end surface 233 of the pressing block 211 is larger than the diameter of the welding strip 209. 9 has a small diameter, and the welding strip 209 is pressed into the welding strip groove of the welding platform 300 along the straight section 231. The fixed clamp 212, the movable clamp 213 and the pressing block 211 form a stable guide to prevent the welding strip 209 from deviating; (2) The downward pressing cylinder 227 extends, driving the pressure plate 218 to press down, assisting the welding strip 209 to enter the groove accurately, and then the downward pressing cylinder 227 is cut off and retracted under the action of the elastic element 229, followed by the needle cylinder being cut off and retracted, and the blocking cylinder 205 being cut off and retracted.

[0046] Fourth, the line-dividing cylinder 102 starts to move, the cylinder shaft is retracted, the vertical lifting module rises to the transport position, and the horizontal transport module moves to the line-taking position, completing the entire swing welding belt 209 action and entering the next cycle. Figure 7 and 8 As shown, the line splitting mechanism 100 is composed of a guide rail mounting plate 101, a line splitting cylinder 102, a line splitting joint 103, a line splitting connecting plate 104, an adjusting bolt 105, a line splitting guide rail 106, a line splitting slider 107, a line splitting floating joint 108, a slider limit seat 109, a limit bolt 110, a slider mounting plate 111 and a magnetic switch 112. The line splitting cylinder 102 is mounted on the guide rail mounting plate 101, and two line splitting cylinder 102 joints and two magnetic switches 112 are mounted on the line splitting cylinder 102. One end of the floating joint of the line splitting cylinder 102 is connected to the line splitting cylinder 102, and the other end is connected to the slider limit seat 109. The initial position of the initial slider mounting plate 111 can be adjusted by adjusting the depth of the threaded hole of the floating joint screw of the line splitting cylinder 102 entering the slider limit seat 109. The adjusting bolt 105 is locked on the guide rail mounting plate 101, and the distance of the branch line can be adjusted by adjusting the depth of the threaded hole on the guide rail mounting plate 101 through which the adjusting bolt 105 enters. There are two branch line guide rails 106, which are locked on both sides of the guide rail mounting plate 101. There are four branch line sliders 107, which can slide on the branch line guide rails 106. The two slider mounting plates 111 are respectively locked on a pair of branch line sliders 107. The slider limit seat 109 is locked on the slider mounting seat without branch line, and the limit bolt 110 is locked on the slider limit seat 109, which is used to tighten the branch line guide rail 106, so that the slider mounting seat without branch line is fixed.

[0047] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A high-precision clamping device for handling photovoltaic welding ribbons, characterized in that: The invention comprises a first mounting plate and a fourth mounting plate which are slidably connected, a plurality of fixed jaws are connected at the bottom of the first mounting plate, a plurality of movable jaws which cooperate with the fixed jaws are connected at the bottom of the fourth mounting plate, the fixed jaws and the movable jaws correspond to each other one by one, the welding strip contact surface of the fixed jaw is a straight surface, the upper part of the welding strip contact surface of the movable jaw is an inclined surface section for guiding the welding strip, and the lower part is a straight surface section, the straight surface section and the welding strip contact surface of the fixed jaw fit together when clamping the welding strip, and the welding strip is located in a V-shaped groove formed by the inclined surface section and the welding strip contact surface of the fixed jaw, a pressure block connected to a needle-type cylinder is provided above the inclined surface section and the straight surface section, the output direction of the needle-type cylinder is parallel to the length direction of the straight surface section, and an active power element for controlling the movable jaw is provided next to the fourth mounting plate.

2. A high-precision clamping device for handling photovoltaic welding ribbons according to claim 1, characterized in that: The movable power element includes a blocking cylinder and a clamping cylinder. The output end of the clamping cylinder is connected to a third mounting plate. A plurality of movable clamps are fixedly connected below the third mounting plate. The output end of the blocking cylinder is connected to a blocking adjustment bolt. The third mounting plate is opposite to the blocking adjustment bolt. The output directions of the blocking cylinder and the clamping cylinder are parallel.

3. A high-precision clamping device for handling photovoltaic welding ribbons according to claim 2, characterized in that: The movable clamping jaws are evenly arranged.

4. A high-precision clamping device for handling photovoltaic welding ribbons according to claim 2, characterized in that: The third mounting plate is slidably connected to the first mounting plate, and the sliding direction of the third mounting plate is parallel to the output directions of the blocking cylinder and the clamping cylinder.

5. A high-precision clamping device for handling photovoltaic welding ribbons according to claim 1, characterized in that: The first mounting plate is connected to a sixth mounting plate via a downward pressure cylinder, and a plurality of flexible pressure plates corresponding to the straight surface sections are arranged below the sixth mounting plate.

6. A high-precision clamping device for transporting photovoltaic welding ribbons according to claim 5, characterized in that: The sixth mounting plate is elastically limited and connected to the first mounting plate. The sixth mounting plate is connected to the first mounting plate via a guide shaft and an elastic element. A fixing ring and an adjusting block for limiting are provided at the end of the guide shaft.

7. A high-precision clamping device for handling photovoltaic welding ribbons according to claim 1, characterized in that: The first mounting plate is fixedly connected to a fifth mounting plate, and the fifth mounting plate is provided with a buffer that cooperates with the fourth mounting plate.

8. A high-precision clamping device for transporting photovoltaic welding ribbons according to claim 1, characterized in that: The lower end of the pressing block is provided with an I-shaped bottom end surface, and the cross-sectional shape of the pressing block is an I-shaped bottom end surface.

9. A high-precision clamping device for transporting photovoltaic welding ribbons according to claim 8, characterized in that: The length of the I-shaped bottom end surface is greater than the maximum distance between the fixed clamping jaw and the movable clamping jaw.

10. A method for using a high-precision clamping device for transporting photovoltaic welding ribbons, using the high-precision clamping device for transporting photovoltaic welding ribbons according to any one of claims 1 to 9, characterized in that: The following steps are involved:

1. Process of taking welding strips: (1) In the initial state, multiple welding strips are stretched and straightened, and both ends of the welding strips are pressed and in a straightened state. The blocking cylinder, clamping cylinder, needle cylinder and pressing cylinder are all in a retracted state. At this time, the spacing between the movable clamping jaw and the fixed clamping jaw is greater than the diameter of the welding strip. According to the diameter of the wire, the clamping floating joint is appropriately adjusted to adjust the initial spacing; (2) The horizontal transport module moves the clamping jaw device to the vicinity of the welding strip. At this time, the distance between the center of the welding strip and the fixed clamping jaw in the horizontal direction is controlled to be half of the diameter of the welding strip. Then the vertical lifting module is lowered to the wire taking position, and then the clamping cylinder extends to push the movable clamping jaw to move, and the movable clamping jaw is tightly attached to the fixed clamping jaw; (3) Then the needle cylinder extends, and the pressure block presses the welding strip along the inclined section into the groove formed by the movable clamping jaw and the fixed clamping jaw; 2. Process of placing the welding strip: (1) The blocking cylinder extends and the clamping cylinder retracts. At this time, the movable jaw opens and hits the blocking adjustment screw. At this time, the distance between the movable jaw and the fixed jaw is larger than the diameter of the welding strip. The size of the opening is appropriately adjusted by the blocking adjustment screw. While the movable jaw opens, the needle cylinder pushes the pressure block downward. The width of the middle part of the I-shaped bottom end face of the pressure block is smaller than the diameter of the welding strip, which just presses the welding strip into the welding strip groove of the welding platform along the straight section. The fixed jaw, movable jaw and pressure block form a stable guide to prevent the welding strip from deviating; (2) The downward pressure cylinder extends, driving the pressure plate to press down, assisting the welding strip to enter the groove accurately, and then the downward pressure cylinder is cut off and retracted under the action of the elastic element. Then the needle cylinder is cut off and retracted, and the blocking cylinder is cut off and retracted.

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