Edge cutting device for photovoltaic module

Abstract

The edge cutting device comprises a blade, a cutting edge, a notch, a knife rest, a knife rest base body, a knife holder and a knife handle component, the blade is of an inverted-T-shaped structure, the notch with the cutting edge is formed in the top of the blade, and a mounting hole is formed in the bottom of the blade; the top of the tool rest is provided with a tool rest base body and an L-shaped tool apron which is arranged at the free end of the tool rest base body and sinks towards the interior of the tool rest base body. A mounting hole is formed in the tool apron; the photovoltaic module trimming device is simple in structure, economical and easy to use, the success rate of one-time trimming is 100%, efficiency is remarkably improved, and cost is reduced. And the design facilitates part replacement and batch production, resources are efficiently utilized, the labor cost is reduced, and the economic benefits and market competitiveness of enterprises are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic component manufacturing, in particular to an edge trimming device for a photovoltaic assembly. Background Art

[0002] Photovoltaic modules usually have a lamination process in the manufacturing process. After the lamination process, the photovoltaic modules will squeeze out EVA at the corners and overflow EVA film. This part of the EVA must be cleanly scraped off before proceeding to the next process link to install the module frame. Figure 1 Schematic diagram of the adhesive film on the side of a photovoltaic module. Currently, during the module edge trimming process, it is found that the one-time removal of the module edge is not very clean, and a second manual edge trimming is required, which reduces work efficiency and affects output and labor costs.

[0003] Because the structure of the edge trimming device for photovoltaic module operation is of a single type, during the processing, the colloid is elastic and the edge trimming device is often shifted to one side, resulting in a low one-time success rate of the edge trimming operation (60-80% success rate). Usually, a second or third edge trimming operation is required. At the same time, two photovoltaic module edge trimming machines are required, and the number of personnel is doubled. Sometimes a third manual operation is required. The third edge trimming process has relatively high production costs, low equipment utilization, and high equipment configuration costs. Utility Model Content

[0004] In view of the shortcomings in the prior art, it is expected that the structural design of the edge trimming device can be improved through the present invention to achieve a 100% success rate in one-time edge trimming operations, and strive to achieve the following effects: improve the work efficiency of the edge trimming process to ensure a smooth production process; effectively reduce the additional manpower input caused by repeated edge trimming, and reduce labor costs by more than half; improve equipment utilization; achieve efficient and low-cost production of photovoltaic modules, and overall improve the economic benefits and market competitiveness of the enterprise.

[0005] The utility model discloses a structure of an edge trimming device for photovoltaic modules; the edge trimming device comprises a blade, a cutting edge, a notch, a tool holder, a tool holder base, a tool seat, a tool handle and a screw component:

[0006] The blade has a "convex" shaped structure, a notch with a blade edge is arranged on the top of the blade, the notch is U-shaped, and a mounting hole is arranged on the bottom of the blade;

[0007] The top of the tool holder is provided with a tool holder base, and an L-shaped tool holder which is provided at the free end of the tool holder base and is recessed into the tool holder base; the tool holder is provided with a mounting hole;

[0008] The bottom of the tool holder is provided with a tool handle for connecting with external equipment;

[0009] When in working condition, the knife handle forms an angle of about 5 degrees with the edge of the photovoltaic module, and through the precise coordination between the various components of the edge trimming device, the burrs of the photovoltaic module overflowing from the film can be effectively removed.

[0010] The gasket is used to fix the blade;

[0011] The screws securely mount the blade and the gasket on the blade seat through the mounting holes.

[0012] For the technical solution described above, it is further preferred that when the edge chamfering device is in use, its tool holder forms an angle of 4-7 degrees with the edge of the photovoltaic module, and the notch of the edge chamfering device is stuck on the edge of the photovoltaic module.

[0013] For the technical solution described above, it is further preferred that the blade material is selected from alloy steel, stainless steel or carbon tool steel.

[0014] For the technical solution described above, it is further preferred that a U-shaped notch is provided in the middle of the top of the blade, a blade is provided deep in the notch, and the notch and the blade are provided integrally.

[0015] For the technical solution described above, it is further preferred that the end opening of the notch has a chamfer

[0016] For the technical solution described above, it is further preferred that the opening width of the notch end is 0.5-1 mm larger than the thickness of the photovoltaic module.

[0017] For the technical solution described above, it is further preferred that the notch depth of the blade is 10-15 mm; the lip width on both sides of the notch is 10-15 mm.

[0018] For the technical solution described above, it is further preferred that the angle between the L-shaped long arm side of the tool holder and the side surface of the tool holder base is 30-40°, and a mounting hole is provided on the long arm side; the recessed portion of the L-shaped tool holder is used to accommodate the blade.

[0019] For the technical solution described above, it is further preferred that, in a use state, the L-shaped short arm side of the knife seat is used to support the bottom of the blade.

[0020] For the technical solution described above, it is further preferred that the tool handle is also provided with a flat mounting portion assembled with the machine, and a mounting hole is provided on the flat structural surface.

[0021] For the technical solution described above, it is further preferred that the blade is a straight-edge blade, a corrugated-edge blade, or an unequal-tooth blade.

[0022] For the technical solution described above, it is further preferred that the unequal-tooth blade has a structure of front teeth for cutting in, middle teeth for cutting, and rear teeth for chip removal and trimming the incision.

[0023] For the technical solution described above, it is further preferred that the blade edge of the corrugated-edge blade has a corrugated structure.

[0024] For the technical solution described above, it is further preferred that the angle between the blade angle on the blade and the cutting speed direction is 2-5°.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] Improve the success rate and efficiency of edge trimming: Through optimized design, ensure that the edge trimming operation is successfully completed in one go, achieve a 100% success rate, and significantly improve the operating efficiency and equipment stability of the edge trimming process.

[0027] Simple structure, economical and easy to use: It adopts streamlined component structure to reduce the complexity of assembly and use, which is not only convenient for large-scale production and replication, but also reduces manufacturing costs. At the same time, the design takes into account the convenient replacement of consumable parts such as blades, extending the life of the device and maintaining efficient operation.

[0028] Effective use of resources and cost reduction: Reduce the manpower input of repeated edge cutting, significantly cut labor costs, and improve the utilization rate of single equipment, thereby achieving the goal of efficient and low-cost production of photovoltaic modules and enhancing the company's economic benefits and market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 .Schematic diagram of the side film of photovoltaic modules;

[0030] Figure 2 . Schematic diagram of the edge trimming device;

[0031] Figure 3 A.3B schematic diagram of the edge trimming device structure;

[0032] Figure 4 A. Schematic diagram of 4B blade structure;

[0033] Figure 5 A.5B.5C.5D Schematic diagram of the tool holder structure.

[0034] Figure 6 .Schematic diagram of gasket structure.

[0035] 1. Blade, 2. Blade holder, 3. Knife handle, 4. Gasket, 5. Screw;

[0036] 11. Blade, 12. Notch, 21. Blade seat, 22. Blade holder base, 23. Mounting hole. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the embodiments, but it should be understood that the protection scope of the present invention is not limited by the embodiments.

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Please note that all dimensions are recommended values ​​based on general industrial standards and empirical data, and may be adjusted in actual application.

[0039] The invention is an edge trimming device which semi-encloses the edge of a photovoltaic module, ensuring that the colloid is not easily skimmed aside during the edge trimming operation of the photovoltaic module, so that the one-time success rate of the edge trimming operation of the photovoltaic module reaches 100%.

[0040] Figure 1 .Schematic diagram of the side film of photovoltaic modules; after lamination, existing photovoltaic modules have overflowing EVA film burrs on the edges. This part of the film needs to be cut off before entering the next step of installing the photovoltaic module frame.

[0041] Figure 2 . Schematic diagram of the working of the edge trimming device; in the use state, the tool holder 2 of the edge trimming device forms an angle of about 5 degrees with the edge of the photovoltaic module, and the notch 12 of the edge trimming device is stuck on the edge of the photovoltaic module, and the edge of the photovoltaic module can be removed by pushing forward;

[0042] Figure 3 A.3B Schematic diagram of the structure of the edge trimming device: The structure of the edge trimming device includes a tool holder 2, a blade 1, a gasket 4, and a screw 5, wherein the screw 5 is a standard part and serves to fix the blade 1 on the tool holder 2; Gasket 4 and screw 5: These two parts are used to fix the blade 1 on the tool holder 2. The screw 5 is usually a standard part, and the gasket 4 provides additional support to maintain stability.

[0043] Figure 4A.4B Schematic diagram of the structure of blade 1: The appearance of blade 1 is a "convex" shaped structure. To ensure its strength, the material is made of high-strength material, such as alloy steel, stainless steel or carbon tool steel, with a thickness of 3mm, to ensure that blade 1 has a certain rigidity and durability. Two mounting holes are set at the bottom of blade 1 to facilitate fixation on the tool holder 2. The bottom width A of blade 1 is about 50mm, which depends on the specific use needs or design requirements. There is a notch 12 in the middle of the top. Notch 12 is U-shaped. A blade 11 is set deep in notch 12. Notch 12 and blade 11 are integrated to prevent collision with photovoltaic modules. The end opening of notch 12 is chamfered, which is safer and prevents collision with photovoltaic modules or scratches on photovoltaic modules. To ensure that notch 12 of blade 1 is easily inserted into the edge of photovoltaic modules, the opening width E at the end of notch 12 is usually slightly larger than the actual thickness of the photovoltaic module, which is slightly larger than the actual thickness of the photovoltaic module. The thickness of the photovoltaic module is 0.5-1mm larger to provide a buffer area to protect the photovoltaic module from being scratched; the depth B of the notch 12 of the blade 1 is generally set within a suitable range, such as 10-15mm, to ensure that the depth is sufficient to clamp the edge of the photovoltaic module, and to be sufficient to accommodate and firmly clamp one side edge of the photovoltaic module; the blade 11 in the notch 12 is used to directly contact the workpiece for cutting, shearing or cutting operations; the lip width D on both sides of the notch 12 is 10-15mm, in order to ensure that it has sufficient strength and can also increase the overall stability of the blade 1; the edges of the blade 1 are all rounded to prevent work-related injuries during operation. In addition, when the blade 1 needs to be replaced or other maintenance tasks are required, the disassembly process is also relatively simple and quick.

[0044] The design of the notch 12 has the following functions:

[0045] Precise guidance: Guiding the edge trimming device: The notch 12 can guide the edge trimming device along a preset track to perform the edge trimming operation and ensure that the edge trimming device is always parallel to the photovoltaic module. This helps to eliminate any quality problems that may be caused by any deviation.

[0046] Chip Evacuation: The slots 12 can capture and remove debris generated during the edge trimming process to prevent clogging of the edge trimming device or contamination of the PV modules. This helps maintain efficient working conditions and a clean workspace.

[0047] Positioning: The slots 12 can be customized in size and depth as needed to match the requirements of the PV module. This ensures the trimming device fits each unique trimming project, increasing productivity and accuracy.

[0048] Reduced wear risk: If the blade 1 does not have the notch 12, then in an unstable environment, the blade 1 may accidentally deflect, resulting in unnecessary wear or even breakage. With the notch 12, this can be effectively reduced even in a high-vibration environment.

[0049] In general, the design of this chamfering device fully considers the needs of practical applications and achieves a good balance between functionality and safety.

[0050] Figure 5 A.5B.5C.5D Schematic diagram of the tool holder 2 structure: the tool holder 2 includes a tool holder base 22, one end of which is connected to the tool handle 3, and the other end is provided with an L-shaped tool seat 21 recessed into the base; the L-shaped long arm side of the tool seat 21 and the side of the tool holder base 22 are at an angle of 30-40°, and a mounting hole 23 is provided on the long arm side; in use, the L-shaped short arm side of the tool seat 21 is used to support the bottom of the blade 1; the tool holder 2 is made of 45 steel, and the recessed part of the L-shaped tool seat 21 is used to accommodate the blade 1; precisely because of the setting of "the L-shaped long arm side of the tool seat 21 and the side of the tool holder base 22 are at an angle of 30-40°", when the blade 1 is installed, the inclined surface formed by the blade 11 of the blade 1 naturally forms a certain angle with the edge surface of the photovoltaic module to be processed, which is more convenient for cutting by the blade 11; the long arm side is provided with a mounting hole 23, which is fastened by screws 5 or other Firmware is fixed; generally, two mounting holes 23 are set, both of which are threaded holes, and their positions and sizes correspond to the mounting holes on the blade 1. The diameter of the mounting hole 23 is 1mm smaller than the mounting hole on the blade 1, so that the screw 5 can easily pass through the hole of the blade 1 and be fixed on the threaded hole of the tool holder 21, so that the blade 1 can be firmly mounted on the tool holder 21, thereby ensuring the accuracy and safety of the edge trimming process; to ensure that the tool holder 21 has sufficient strength, the width W of the tool holder 21 is 2-5mm wider than the blade 1, and the length I of the tool holder base 22 is 40-50mm; the length H of the tool handle 3 is 80-100mm, and the diameter G is 20mm. The tool handle 3 is also provided with a mounting portion for convenient assembly with a machine, the length F of which is 40-50mm, and is made into a flat structure, and two mounting holes are arranged on the mounting surface of the flat structure, which is convenient for better coordination and installation with the equipment.

[0051] Figure 5 . Schematic diagram of the structure of gasket 4: The main function of gasket 4 is to protect the surface of blade 1 when screw 5 fixes blade 1, and to help better position blade 1. It is made of 45 steel, with a length L that is the same as the width W of blade holder 21, a width J of 18-20mm, and two mounting holes that are consistent with the size of blade 1. When using the edge trimming device, place the bottom of blade 1 into blade holder 21, align the empty space, cover with gasket 4, fix gasket 4 and blade 1 to blade holder 21 with flat head screw 5, and fix handle 3 on the device, and then adjust the device to bring the edge trimming device close to the photovoltaic module, such as Figure 2 The handle 3 of the edge trimming device is at an angle of about 5 degrees to the edge of the photovoltaic module to prevent the knife holder 2 and the device of the edge trimming device from colliding with the photovoltaic module. The edge of the photovoltaic module is inserted between the notches 12 of the blade 1 of the edge trimming device, and the blade 11 cuts into the colloid burrs of the photovoltaic module and pushes forward to remove the burrs of the overflowed glue on the edge of the photovoltaic module.

[0052] Example 2 Corrugated edge blade:

[0053] The straight edge 11 of the blade 1 of the original embodiment 1 is changed into a corrugated edge;

[0054] The corrugated blade adds multiple small waves. These corrugated structures can disperse the local stress during cutting and reduce cutting resistance. They are also helpful in reducing vibration and improving cutting stability. When processing the edge burrs of the adhesive film on the edge of photovoltaic modules, the corrugated blade can better adapt to the changes in thickness and hardness, ensuring a smooth and uniform cutting process.

[0055] Example 3 Unequal Tooth Blade

[0056] Based on the straight edge 11 of the blade 1 of the original embodiment 1, an unequal toothed blade is replaced;

[0057] The unequal tooth blades mentioned above have slightly different geometric dimensions of each tooth, such as the front angle, back angle, and tooth depth. This design can reasonably distribute the cutting load of each tooth according to the material of the film and the actual needs of the edge trimming operation, reduce the situation where a single tooth is subjected to excessive load, thereby increasing the tool life and enhancing the cutting efficiency. For example, a combination of different numbers of teeth and angles is set on the blade, the front teeth are used for cutting, the middle teeth are responsible for the main cutting, and the rear teeth help to remove chips and trim the cut.

[0058] In the specific embodiment design, the following refined design can be adopted to adapt to the characteristics of PVC materials:

[0059] Front cutting teeth:

[0060] The sharp and strong leading edge is designed to ensure that it can easily penetrate the overflow layer of PVC material and reduce the resistance during initial cutting. The leading edge can adopt a small main deflection angle so that the tool can cut into the material more vertically and avoid greater stress due to the hardness of PVC.

[0061] Middle cutting teeth:

[0062] The middle part of the cutter teeth should have a large effective cutting area and a reasonable tooth pitch to ensure sufficient cutting force in the main cutting stage and to quickly cut off most of the overflow burrs.

[0063] Rear end dressing and chip removal teeth:

[0064] The rear end teeth are designed with a bevel or arc structure with a certain angle to guide the chips to be discharged smoothly, and at the same time, the cutting edge can be smoothed to reduce the appearance of burrs and irregular edges; by increasing the secondary rake angle or using special shapes such as V-shaped and U-shaped chip grooves, it helps to separate the chips from the contact area between the tool and the workpiece and guide them to the designated chip removal path, avoiding chip accumulation that affects the working efficiency of the tool and the surface quality of the component.

[0065] Example 4

[0066] Blade angle: The main rake angle refers to the angle between the blade and the cutting speed direction. Appropriately reducing the main rake angle can make the tool easier to cut into the workpiece and reduce cutting resistance. The angle between the blade angle on the blade 1 and the cutting speed direction can be 2-5°; and the secondary rake angle is the angle between the projection line of the blade perpendicular to the base surface and the feed direction. By adjusting the secondary rake angle, the angle and shape of chip outflow can be improved, which is beneficial to the discharge of debris and avoids clogging of the slot.

[0067] At the same time, for the design of the blade rake angle, increasing the rake angle means a sharper blade, which can reduce cutting deformation and required cutting force, but may also lead to increased tool wear. Therefore, combined with the characteristics of high-strength materials, a moderate rake angle can be designed, combined with the optimization of the main rake angle and the secondary rake angle, to achieve the purpose of improving the cutting efficiency while ensuring the durability of the tool.

[0068] In summary, by optimizing the blade shape such as corrugated blade or unequal tooth shape and angles such as main rake angle, secondary rake angle and front angle, the cutting resistance can be effectively reduced, the overall edge trimming efficiency can be improved, and the tool life can be extended while maintaining the edge trimming quality.

[0069] Example 5

[0070] Based on the existing screw 5 fastening method, the screw is changed into a fast rotation locking design. A special self-locking nut or butterfly nut can be used on the knife seat 21 and the gasket 4, and the operator only needs to twist a certain angle to quickly complete the fastening or loosening action.

[0071] Example 6

[0072] A positioning pin hole is additionally provided near the mounting hole at the bottom of the blade 1 , and a quick positioning pin matching with the same is provided at a corresponding position on the blade seat 21 .

[0073] Place the new blade 1 in the recessed part of the blade holder 21, making sure that the two mounting holes at the bottom of the blade are aligned with the threaded holes on the blade holder.

[0074] Then, insert the pre-designed quick positioning pin into the newly added positioning pin hole at the bottom of the blade. The function of the positioning pin is to ensure that the blade can be quickly and accurately positioned when it is installed in the blade holder to avoid position deviation or rotational dislocation caused by human factors.

[0075] When the locating pin is fully embedded in the locating pin hole, the blade will be firmly fixed in the correct position. At this time, the angle and position relationship between the blade notch 12 and the blade seat are locked.

[0076] Finally, the flat head screw 5 is passed through the mounting hole of the blade 1 and the gasket 4, and screwed into the threaded hole of the blade holder 21 to tighten the blade. In this process, due to the presence of the positioning pin, it can be ensured that the blade will not move at all, ensuring that the blade 11 is accurately aligned with the edge of the photovoltaic module to be chamfered.

[0077] The quick positioning pin can be designed with a spring load. When the blade is inserted into place, the spring pushes the positioning pin to automatically bounce into the blade pin hole and lock the position, improving the replacement speed and accuracy.

[0078] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A photovoltaic module edge trimming device, characterized in that: The edge trimming device comprises a blade (1), a cutting edge (11), a notch (12), a tool holder (2), a tool holder base (22), a tool seat (21), a tool handle (3) and a screw (5): The blade (1) has a "convex"-shaped structure, a notch (12) with a blade (11) is provided at the top of the blade (1), the notch (12) is U-shaped, and a mounting hole (23) is provided at the bottom of the blade (1); The top of the tool holder (2) is provided with a tool holder base (22), and an L-shaped tool holder (21) which is provided at the free end of the tool holder base (22) and is recessed into the tool holder base (22); a mounting hole (23) is provided on the tool holder (21); A handle (3) for connecting to an external device is provided at the bottom of the tool holder (2); The screws (5) securely mount the blade (1) and the gasket (4) on the blade seat (21) through the mounting holes.

2. The edge trimming device according to claim 1, characterized in that: When the edge trimming device is in use, the tool holder (2) forms an angle of 4-7 degrees with the edge of the photovoltaic module, and the notch (12) of the edge trimming device is stuck on the edge of the photovoltaic module.

3. The edge trimming device according to claim 1, characterized in that: The blade (1) is made of a material selected from alloy steel, stainless steel or carbon tool steel.

4. The edge trimming device according to claim 1, characterized in that: The blade (1) has a notch (12) in the middle of the top, a blade (11) is arranged deep inside the notch (12), and the notch (12) and the blade (11) are arranged integrally.

5. The edge trimming device according to claim 1, characterized in that: The opening width of the end of the notch (12) is 0.5-1 mm greater than the thickness of the photovoltaic module; the depth of the notch (12) of the blade (1) is 10-15 mm; and the lip widths on both sides of the notch (12) are 10-15 mm.

6. The edge trimming device according to claim 1, characterized in that: The included angle between the L-shaped long arm side of the knife seat (21) and the side surface of the knife holder base (22) is 30-40°, and a mounting hole (23) is provided on the long arm side; the recessed portion of the L-shaped knife seat (21) is used to accommodate the blade (1).

7. The edge trimming device according to claim 1, characterized in that: When in use, the L-shaped short arm side of the blade holder (21) is used to abut against the bottom of the blade (1).

8. The edge trimming device according to claim 1, characterized in that: The blade (1) is a straight-edge blade, a corrugated-edge blade, or an unequal-tooth blade.

9. The edge trimming device according to claim 8, characterized in that: The unequal tooth blade has a structure of front teeth for cutting, middle teeth for cutting, and rear teeth for chip removal and trimming the cut; Alternatively, the blade edge of the corrugated blade has a corrugated structure.

10. The edge trimming device according to claim 8, characterized in that: The angle between the blade edge angle on the blade (1) and the cutting speed direction is 2-5°.

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