A positioning pin assembly and film pulling and winding apparatus

Abstract

The embodiment of the application provides a positioning pin assembly and a film traction and winding device, and relates to the technical field of film production. The positioning pin assembly comprises a positioning pin block and a positioning pin. The length of the positioning pin in the axial direction is 85mm-95mm. The bottom of the positioning pin in the axial direction is inserted into the positioning pin block. The top of the positioning pin in the axial direction protrudes and is arranged in an extension and retraction mode relative to the positioning pin block. The positioning pin assembly and the film traction and winding device can keep the winding roller at high positioning accuracy, effectively reduce the position deviation of the winding roller, and ensure the stable operation of the device.

Description

Technical Field

[0001] This application relates to the field of film production technology, and more specifically, to a positioning pin assembly and a film traction winding device. Background Technology

[0002] Film capacitors are capacitors that use plastic film as the dielectric. The production process typically involves a series of steps, including melt extrusion, filtration, stretching, edge trimming, corona treatment, winding, and packaging. The traction winding equipment draws the film from the unwinding device to the winding device and evenly winds it onto the winding rollers. During traction winding, positioning pins are often used to determine the precise position of the winding rollers or related components within the traction winding equipment. This ensures that the components maintain accurate position and angle during winding, preventing offsets and wobbling, and thus guaranteeing the quality of the film winding.

[0003] However, the positioning effect of existing positioning pins is limited. They are not stable enough when resisting interference factors such as mechanical vibration and film tension impact, and are prone to deviation. This makes it impossible to ensure that the winding roller is always in a precise position during the production process, resulting in the film winding quality failing to meet the standards of high-end products and a high scrap rate. Moreover, positioning pins are easily damaged, and the consumption rate of spare parts is high.

[0004] Therefore, it is necessary to design a positioning pin for a high-precision positioning traction winding device. Utility Model Content

[0005] The purpose of this application is to provide a positioning pin assembly and a film traction winding device, which can maintain high positioning accuracy of the winding roller, effectively reduce the positional deviation of the winding roller, and ensure the stable operation of the device.

[0006] In a first aspect, embodiments of this application provide a positioning pin assembly, which includes: Positioning pin; The positioning pin has an axial length of 85mm to 95mm. The bottom of the positioning pin is inserted into the positioning pin block, and the top of the positioning pin extends out and is telescopically set relative to the positioning pin block.

[0007] In the above implementation process, after the positioning pin assembly is installed in place, it together with the take-up roller and the fixed object (usually a chuck) to form a positioning system. Specifically, the positioning pin is precisely matched with the take-up roller, the positioning pin is set along the axial direction of the take-up roller, and the top of the positioning pin presses against the end face of the take-up roller and rotates synchronously to ensure the axial positioning of the take-up roller during operation; the bottom of the positioning pin is inserted into the positioning pin block, which plays an auxiliary support and positioning role, further limiting the axial displacement of the positioning pin; and the positioning pin block is fixed to the fixed object to realize the installation of the overall structure (in this embodiment, the positioning pin block is precisely matched with the chuck used to clamp and fix the take-up roller and fixed together), providing a stable basic support for the overall structure without affecting the telescopic positioning of the positioning pin. In the positioning system, the contact points between the tip of the positioning pin and the take-up roller, the contact points between the take-up roller and the fixed object (clamp), and the contact points between the fixed object (clamp) and the positioning pin block can collectively form an approximately equilateral triangle layout. Based on the principle of triangle stability, this allows the positioning system to maintain high positioning accuracy when facing interference factors such as mechanical vibration and film tension impact, effectively reducing the positional deviation of the take-up roller and ensuring stable equipment operation. Furthermore, the length of the positioning pin is controlled between 85mm and 95mm, achieving a balance between strength and installation space—that is, simultaneously possessing high strength and a small installation space.

[0008] In one possible implementation, the positioning pin is divided into a positioning section and a support section from top to bottom. Both the positioning section and the support section are cylindrical and coaxial, and the outer diameter of the positioning section is smaller than the outer diameter of the support section. The positioning pin block has a first receiving cavity for accommodating the support section and a mounting hole for the positioning section to pass through. One end face of the mounting hole is located on the top surface of the positioning pin block, and the other end is connected to the receiving cavity.

[0009] In the above implementation process, the positioning pin adopts a two-stage stepped structure, with each stage serving a different function. The top of the positioning pin contacts the take-up roller, the middle part cooperates with the positioning pin block, and the bottom can cooperate with the elastic element to realize the telescopic setting of the positioning pin. The positioning pin block has a first receiving cavity and a mounting hole inside, which matches the shape of the positioning pin and has a stepped structure. By utilizing the cavity of the stepped structure inside the positioning pin block, the positioning pin can be set and can be telescopic, thereby forming a stable support structure using the positioning pin block and enhancing positioning stability.

[0010] In one possible implementation, the outer diameter of the positioning segment is 13mm to 15mm, and the length of the positioning pin is no greater than 8:1 of the outer diameter of the positioning segment. And / or, the surface of the first receiving cavity is provided with circumferential anti-slip grooves.

[0011] In the above implementation process, the ratio of the length of the locating pin to the outer diameter of the locating section is no greater than 8:1, increasing the critical load Pcr for elastic buckling of the locating pin. A circumferential anti-slip groove is formed on the surface of the first receiving cavity to suppress vibration slippage.

[0012] In one possible implementation, the bottom surface of the first receiving cavity is located on the bottom surface of the positioning pin block, and a positioning base for sealing the first receiving cavity is fixedly provided at the bottom of the positioning pin block, and a compression spring is provided between the positioning base and the positioning pin.

[0013] In the above implementation process, the first receiving cavity has an opening on the bottom surface to facilitate the insertion and installation of the positioning pin into the interior, and the opening is closed by the positioning pin block to form a complete positioning structure, in which a compression spring is provided to realize the extension and retraction of the positioning pin.

[0014] In one possible implementation, the bottom of the positioning pin is provided with a second receiving cavity, the bottom surface of the second receiving cavity is located on the bottom surface of the support section; the top surface of the positioning base is provided with a raised step corresponding to the position of the second receiving cavity, the bottom of the compression spring is sleeved on the step, and the top of the compression spring extends into the second receiving cavity.

[0015] In the above implementation process, the positioning of the compression spring is achieved by using the second receiving cavity at the bottom of the positioning pin and the step of the positioning base.

[0016] In one possible implementation, the top of the locating pin is provided with a frustum-shaped chamfer, the taper of which is 1:(40~50).

[0017] In the above implementation process, the top of the positioning pin is provided with a certain taper chamfer to facilitate quick and accurate docking with the take-up roller and reduce radial offset when the film is subjected to tension impact.

[0018] In one possible implementation, the locating pin extends 38-45 mm beyond the locating pin block.

[0019] In one possible implementation, the gap between the locating pin and the locating pin block is 0.03mm to 0.05mm.

[0020] Secondly, embodiments of this application provide a film traction and winding device, which includes a support frame, on which a winding roller is disposed, and a positioning pin assembly provided in the first aspect, wherein the top of the positioning pin in the positioning pin assembly abuts against the end face of the winding roller and is capable of rotating synchronously.

[0021] The above implementation process enables the take-up roller to maintain high positioning accuracy, effectively reduces the positional deviation of the take-up roller, and ensures the stable operation of the equipment.

[0022] In one possible implementation, the two ends of the take-up roller are respectively mounted by clamps, and at least one end of the take-up roller is provided with the positioning pin assembly, the positioning pin block of the positioning pin assembly being fixed to the clamp at the same end. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a structural schematic diagram of a positioning pin assembly provided in an embodiment of this application; Figure 2 for Figure 1 Schematic diagram of the center positioning pin; Figure 3 for Figure 1 Schematic diagram of the middle positioning pin block; Figure 4 for Figure 3 Sectional view along line AA; Figure 5 for Figure 1 Schematic diagram of the center positioning base; Figure 6 for Figure 5 Sectional view along line BB; Figure 7 This application provides a schematic diagram of the corresponding structure between the positioning pin-ligand and the winding roller in a film traction winding device. Figure 8 for Figure 7 Schematic diagram of the installation structure of the center positioning pin assembly.

[0025] Icons: 01-Positioning pin assembly; 1-Positioning pin; 11-Positioning section; 12-Supporting section; 13-Second receiving cavity; 2-Positioning pin block; 21-Mounting hole; 22-First bolt hole; 3-Positioning base; 31-Step; 32-Second bolt hole; 4-Compression spring; 5-Take-up roller; 51-Matching hole; 52-Positioning hole; 6-Clamp; 61-Fixing component. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Please refer to Figure 1 and Figure 7 , Figure 8This embodiment provides a positioning pin assembly 01, which includes a positioning pin block 2 and a positioning pin 1. The axial length of the positioning pin 1 is 85mm to 95mm. The bottom of the positioning pin 1 is inserted into the positioning pin block 2 along the axial direction, and the top of the positioning pin 1 extends out along the axial direction and is telescopically configured relative to the positioning pin block 2. Exemplarily, the axial length of the positioning pin 1 is 85mm, 87mm, 90mm, 92mm, 95mm, or any two of the above values. In this embodiment, it is set to 87mm. In some embodiments of this application, the length of the positioning pin 1 extending out of the positioning pin block 2 is 38 to 45mm. In this embodiment, it is set to 40mm.

[0034] In this embodiment, for ease of description, the top and bottom of the locating pin assembly 01 refer to the orientation of the locating pin 1 when its axis is vertically aligned, and are not limited to the orientation of the locating pin assembly 01 after it is installed. In practical applications, after the locating pin assembly 01 is installed, the locating pin 1 is usually horizontally aligned.

[0035] In this embodiment, after the positioning pin assembly 01 is installed in place, it together with the take-up roller 5 and the fixed object (usually the chuck 6) to form a positioning system. Specifically, the positioning pin 1 is precisely matched with the take-up roller 5. The positioning pin 1 is set along the axial direction of the take-up roller 5, and the top of the positioning pin 1 presses against the end face of the take-up roller 5 and rotates synchronously to ensure the axial positioning of the take-up roller 5 during operation. The bottom of the positioning pin 1 is inserted into the positioning pin block 2, which plays an auxiliary support and positioning role, further limiting the axial displacement of the positioning pin 1. The positioning pin block 2 is fixed to the fixed object to realize the installation of the overall structure (in this embodiment, the positioning pin block 2 is precisely matched with the chuck 6 used to clamp and fix the take-up roller 5 and fixed together), providing a stable basic support for the overall structure without affecting the telescopic positioning of the positioning pin 1. The contact points between the top of the positioning pin 1 and the take-up roller 5, the contact points between the take-up roller 5 and the fixed object (clamp 6), and the contact points between the fixed object (clamp 6) and the positioning pin block 2 in the positioning system can collectively form an approximately equilateral triangle layout. Based on the principle of triangle stability, the positioning system can maintain high positioning accuracy when facing interference factors such as mechanical vibration and film tension impact, effectively reducing the positional deviation of the take-up roller 5 and ensuring the stable operation of the equipment.

[0036] For the above positioning system, through mechanical simulation and working condition testing, the length of the positioning pin 1 is controlled to be 85mm to 95mm, which can achieve a balance between strength and installation space, that is, it has both high strength and small installation space.

[0037] When the length of positioning pin 1 is less than 85mm, the effective length of positioning pin 1 is shortened, which leads to a decrease in the triangular stability of the positioning system (according to the principle of geometric stability, if the side length is too short, the support angle θ will be less than 60°, and the anti-overturning moment will decrease by more than 40%). The fit depth between positioning pin 1 and positioning pin block 2 is insufficient (the standard fit depth should be ≥1.5 times the diameter), and axial movement is easily generated under mechanical vibration. When the measured vibration amplitude exceeds 0.5mm, the positioning deviation rate of winding roller 5 increases sharply from 3% to 12%. The force support point of positioning pin block 2 moves inward, and the root stress concentration factor Kt increases from 1.8 to 2.3, and the fatigue life is shortened to 1 / 3 of the original design (refer to ISO13586 fatigue test standard).

[0038] When the length of the positioning pin 1 is greater than 95mm, it is easy to exceed the reserved space for equipment installation (the limit installation depth of the winding mechanism is usually 98mm), which will cause mechanical interference between the positioning pin 1 and the tension sensor, and the fluctuation amplitude of film tension will increase by 20%~30%; when the length-to-diameter ratio (L / D) is too large, exceeding 8:1, the critical load Pcr for the pin body to undergo elastic buckling is reduced to 60% of the safe value (calculated according to Euler's formula), and lateral vibration is easily generated during high-speed operation (resonance is triggered when the frequency is ≥20Hz); the increase in material usage leads to a 15% increase in cost, and the excessively long cantilever structure increases the heat treatment deformation rate from 5% to 12%, making it difficult to control the dimensional tolerance within ±0.05mm.

[0039] To facilitate the overall fixing of the positioning pin assembly 01 to the fixed object (clamp 6), the clamp 6 can be provided with a notch, and the shape of the positioning pin block 2 matches the notch. For example, one side of the positioning pin block 2 is arc-shaped, and its curvature can just match the curvature of the notch of the clamp 6, so that the positioning pin block 2 is embedded in the notch, and the positioning pin block 2 is fixed together with the clamp 6 using the fastener 61, thereby realizing the fixed installation of the positioning pin assembly 01.

[0040] Please refer to Figure 2 and Figure 3 , Figure 4 In some embodiments of this application, the positioning pin 1 is divided into a positioning section 11 and a support section 12 from top to bottom. Both the positioning section 11 and the support section 12 are cylindrical and coaxial, and the outer diameter of the positioning section 11 is smaller than the outer diameter of the support section 12, forming an overall variable-diameter stepped structure. The positioning pin block 2 has a first receiving cavity for accommodating the support section 12 and a mounting hole 21 for the positioning section 11 to pass through. One end face of the mounting hole 21 is located on the top surface of the positioning pin block 2, and the other end is connected to the receiving cavity. In this embodiment, the positioning pin block 2 is provided with a first bolt hole 22 (through hole) at a position offset from the first receiving cavity and the mounting hole 21, so as to facilitate the fixing of the positioning pin block 2 and the fixed object (clamp 6) by bolts.

[0041] In this embodiment, the positioning pin 1 adopts a two-section stepped structure, with each section serving a different function. The top of the positioning pin 1 contacts the take-up roller 5, the middle part cooperates with the positioning pin block 2, and the bottom can cooperate with an elastic element to realize the telescopic setting of the positioning pin 1. The positioning pin block 2 has a first receiving cavity and a mounting hole 21 inside, which matches the shape of the positioning pin 1 and has a stepped structure. Utilizing the cavity of the stepped structure inside the positioning pin block 2, the positioning pin 1 is set and can be telescopic, thereby forming a stable support structure using the positioning pin block 2 and enhancing positioning stability. Through the stepped design with gradually changing diameter, stress dispersion is achieved, and the maximum stress concentration coefficient is reduced from 2.3 in conventional structures to 1.5, effectively improving the structural load-bearing capacity.

[0042] In some embodiments of this application, the outer diameter of the positioning segment 11 is 13~15mm. In this embodiment, the outer diameter of the positioning segment 11 is 14mm.

[0043] In some embodiments of this application, the length of the locating pin 1 is equal to the outer diameter of the locating segment 11. This can be understood as the length-to-diameter ratio (L / D) of the locating pin 1 not exceeding 8:1, thereby increasing the critical load Pcr at which the locating pin 1 undergoes elastic buckling.

[0044] In some embodiments of this application, the top end of the positioning segment 11 of the positioning pin 1 is provided with a frustum-shaped chamfer, and the taper of the frustum is 1: (40~50).

[0045] In this application, the top of the positioning pin 1 is shaped like a frustum. Its taper is the ratio of the difference in diameter between the upper and lower base circles to the height of the frustum, that is, taper = (upper base diameter - lower base diameter) ÷ height.

[0046] In this embodiment, the top of the positioning pin 1 is provided with a certain taper chamfer to facilitate quick installation and quick and accurate docking with the take-up roller 5, thereby reducing radial offset during film tension impact.

[0047] In some embodiments of this application, the surface of the first receiving cavity is provided with a circumferential anti-slip groove. In this embodiment, the surface of the first receiving cavity is provided with a circumferential anti-slip groove (groove depth 0.5mm, pitch 3mm) to increase the coefficient of friction to 0.8 (the original optical axis is 0.3) and suppress vibration slippage.

[0048] In some embodiments of this application, the gap between the positioning pin 1 and the positioning pin block 2 is 0.03mm to 0.05mm.

[0049] In this implementation method, the original locating pin 1 had a diameter of φ12mm, adopted a smooth shaft structure, and had a clearance of 0.08mm~0.12mm. The improved locating pin 1 has a diameter increased to φ14mm, and the clearance reduced to 0.03mm~0.05mm. Performance is improved through the following mechanisms: contact area increased by 30%, unit pressure decreased from 120MPa to 85MPa, and wear rate reduced by 50% (referencing ASTM G77 abrasive wear test). Shear strength is increased by 40% (material mechanics calculations show that for every 1mm increase in diameter, shear capacity increases by 15%).

[0050] Please refer to the following: Figure 5 , Figure 6 In some embodiments of this application, the bottom surface of the first receiving cavity is located on the bottom surface of the positioning pin block 2. A positioning base 3 for sealing the first receiving cavity is fixedly provided at the bottom of the positioning pin block 2, and a compression spring 4 is provided between the positioning base 3 and the positioning pin 1. In one embodiment, a second receiving cavity 13 is provided at the bottom of the positioning pin 1, and the bottom surface of the second receiving cavity 13 is located on the bottom surface of the support section 12. A raised step 31 is provided on the top surface of the positioning base 3 corresponding to the position of the second receiving cavity 13. The bottom of the compression spring 4 is sleeved on the step 31, and the top of the compression spring 4 extends into the second receiving cavity 13.

[0051] In this embodiment, the step 31 of the positioning base 3 is hollow, providing good strength; a cross-shaped reinforcing rib (2mm thick) is added to raise the natural frequency of the pin from 120Hz to 180Hz, avoiding the equipment resonance range (140Hz~160Hz). The positioning base 3 has a second bolt hole 32 (through hole) pre-set at a position offset from the step 31 to facilitate the installation of bolts to fix the positioning base 3 and the positioning pin block 2.

[0052] In this embodiment, the positioning pin 1 has undergone surface treatment: a PVD coating (TiN coating, 3μm thick) is used, which increases the surface hardness from HRC35 to HRC65, extends the wear resistance life by 3 times (refer to ISO 2064 hardness test), and reduces the friction coefficient to 0.15, thereby reducing the lateral wear of the positioning pin 1 caused by film tension fluctuations.

[0053] In terms of heat treatment, a composite process of "quenching + tempering + gas nitriding" is adopted: First, the locating pin 1 is heated to 850~860℃ for quenching, which promotes the formation of a uniform and fine martensitic structure inside the material, significantly improving the overall strength; then, it is tempered in the temperature range of 580~600℃ to effectively eliminate quenching stress and optimize the toughness of the material; finally, gas nitriding is performed, which is carried out at 500~550℃ under a pressure of 1~1.5MPa for 8~10 hours to form a nitrided layer with a thickness of 0.3~0.5mm on the surface of the locating pin 1. After this process, the surface hardness of the locating pin 1 reaches HRC58-62, and the wear resistance is improved by 3 times compared with the conventionally treated 80mm locating pin 1. Laboratory data shows that under the same working conditions (load 200N, speed 1500r / min, continuous operation for 500 hours), the wear of the 80mm positioning pin 1 is 0.2mm, while the wear of the 87mm positioning pin 1 is only 0.06mm, which effectively extends the service life of the positioning pin 1 and ensures the long-term stable operation of the positioning system.

[0054] In this embodiment, during the upgrade process of the core components of the capacitor film traction winding equipment, the structure of the positioning pin assembly 01 was redesigned, and the original 80mm long positioning pin was replaced with an 87mm positioning pin. This is not only a minor adjustment in size, but also a comprehensive breakthrough in performance and function, and its technical advantages have been fully demonstrated in production practice. From the perspective of positioning accuracy, the 87mm positioning pin, with its length advantage, effectively expands the contact area with the winding roller 5 and the mounting base, forming a more stable three-point positioning support structure. The following experimental data can verify that the positioning pin assembly 01 of this embodiment has high positioning accuracy for the winding roller 5: 1. Compared to the 80mm long locating pin, the improved single length (87mm long locating pin) reduces the overall wear rate by 25% and the vibration displacement is ≤0.3mm.

[0055] 2. Compared to the 80mm long positioning pin, multi-parameter improvements (positioning pin length 87mm + φ14mm + coating): wear rate reduced by 72%, vibration displacement ≤0.1mm, demonstrating the non-obviousness of synergistic improvements. Therefore, compared to the 80mm positioning pin, when facing mechanical vibrations generated at high speeds (e.g., exceeding 300m / min), the 87mm positioning pin can reduce the radial runout error of the take-up roller 5 from ±0.3mm to within ±0.1mm, greatly improving positioning stability.

[0056] 3. For the production of ultra-thin film capacitors with a thickness of only 2~5μm, precise positioning can reduce the occurrence rate of film wrinkles by 82% and increase the winding yield from 78% to 96%, providing a reliable guarantee for the manufacturing of high-end capacitor films.

[0057] 4. Mechanical testing has verified that when subjected to a high-strength tension of 1500N, the shear strength of the 87mm positioning pin in this design reaches 1280MPa, which is 40% higher than that of the 80mm positioning pin (the shear strength of the 80mm positioning pin is 915MPa). At the same time, the deformation is controlled within 0.03mm, which is far lower than the 0.1mm of the existing technology, effectively avoiding positioning failure problems and significantly improving the reliability and stability of the positioning system.

[0058] 5. From the perspective of mechanical performance optimization, the 87mm locating pin uses 42CrMo high-strength alloy steel as the base material. This material has excellent comprehensive mechanical properties, with a yield strength of 930MPa, a tensile strength exceeding 1080MPa, and an impact toughness value ≥63J / cm. 2 This provides a solid mechanical foundation for the positioning pin.

[0059] 6. In terms of cost-effectiveness, the 87mm positioning pin, with its high stability and long lifespan, reduces the annual maintenance frequency from 12 times to 3 times, and shortens the single maintenance time from 8 hours to 2 hours, saving more than 200,000 yuan in equipment downtime costs annually. At the same time, due to the improved product yield resulting from the increased positioning accuracy, approximately 150,000 yuan of scrap loss can be reduced for every 1 million square meters of film produced, significantly enhancing the company's market competitiveness.

[0060] In summary, the 87mm positioning pin, through multi-dimensional performance optimization, fundamentally solves the technical bottleneck of the traditional 80mm positioning pin, providing an innovative technical solution for the efficient and stable operation of capacitor film traction winding equipment.

[0061] Please refer to Figure 7 and Figure 8 This application embodiment also provides a film traction winding device, which includes a bracket, a winding roller 5 disposed on the bracket, and a positioning pin assembly 01 as described in the previous embodiment. The top of the positioning pin 1 in the positioning pin assembly 01 presses against a pre-set positioning hole 52 on the end face of the winding roller 5 and can rotate synchronously. The positioning pin 1 is used to press against the positioning hole 52 on the steel core end face of the winding roller 5 to achieve positioning of the winding roller 5.

[0062] In some embodiments of this application, the two ends of the take-up roller 5 are respectively mounted by clamps 6, and at least one end of the take-up roller 5 is provided with a positioning pin assembly 01. The positioning pin block 2 of the positioning pin assembly 01 is fixed to the clamp 6 at the same end by a fastener 61. The clamp 6 is used to assemble the positioning pin assembly 01 as a whole into the rotational position of the take-up roller 5. In this embodiment, the steel core of the take-up roller 5 has a docking hole 51 located in the middle of the end face, and the end face has a positioning hole 52. The clamps 6 at both ends of the take-up roller 5 are respectively docked into the docking holes 51 at both ends of the steel core. The clamps 6 are used to fix the steel core of the take-up roller 5. At the same time, the top end of the positioning pin 1 of the positioning pin assembly 01, which is matched and fixed on the clamp 6, extends out and inserts into a positioning hole 52 on the end face of the take-up roller 5 at the same end. When the clamp 6 and the clamped take-up roller 5 rotate, the positioning pin assembly 01 rotates synchronously.

[0063] In this embodiment, the positioning pin 1 and the take-up roller 5 are precisely matched. The contact point between the top of the positioning pin 1 and the take-up roller 5 (positioning hole 52), the contact point between the take-up roller 5 and the chuck 6 (connection hole 51), and the contact point between the chuck 6 and the positioning pin block 2 can together form an approximately equilateral triangle layout.

[0064] In some embodiments of this application, a driving device is also included. The driving end of the driving device is coaxially connected to the take-up roller 5 via a chuck 6, and is used to drive the take-up roller 5 to rotate. A guide roller is also provided on the bracket, and the guide roller is arranged side by side with the take-up roller 5.

[0065] In summary, the positioning pin assembly and film traction winding equipment of this application embodiment can maintain high positioning accuracy of the winding roller, effectively reduce the positional deviation of the winding roller, and ensure stable operation of the equipment.

[0066] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A locating pin assembly, characterized in that, It includes: Positioning pin; The locating pin has an axial length of 85mm to 95mm. The bottom of the locating pin is inserted into the locating pin block, and the top of the locating pin extends out and is telescopically set relative to the locating pin block.

2. The positioning pin assembly according to claim 1, characterized in that, The positioning pin is divided into a positioning section and a support section from top to bottom. Both the positioning section and the support section are cylindrical and coaxial, and the outer diameter of the positioning section is smaller than the outer diameter of the support section. The positioning pin block has a first receiving cavity for accommodating the support section and a mounting hole for the positioning section to pass through. One end face of the mounting hole is located on the top surface of the positioning pin block, and the other end is connected to the receiving cavity.

3. The positioning pin assembly according to claim 2, characterized in that, The outer diameter of the positioning section is 13mm~15mm, and the length of the positioning pin is no greater than 8:1 of the outer diameter of the positioning section. And / or, the surface of the first receiving cavity is provided with circumferential anti-slip grooves.

4. The positioning pin assembly according to claim 2, characterized in that, The bottom surface of the first receiving cavity is located on the bottom surface of the positioning pin block. The bottom of the positioning pin block is fixedly provided with a positioning base for sealing the first receiving cavity. A compression spring is provided between the positioning base and the positioning pin.

5. The locating pin assembly according to claim 4, characterized in that, The bottom of the positioning pin is provided with a second receiving cavity, and the bottom surface of the second receiving cavity is located on the bottom surface of the support section; the top surface of the positioning base is provided with a raised step corresponding to the position of the second receiving cavity, the bottom of the compression spring is sleeved on the step, and the top of the compression spring extends into the second receiving cavity.

6. The locating pin assembly according to claim 1 or 2, characterized in that, The top of the positioning pin is provided with a frustum-shaped chamfer, and the taper of the frustum is 1: (40~50).

7. The locating pin assembly according to claim 1 or 2, characterized in that, The length of the positioning pin extending out of the positioning pin block is 38mm~45mm; And / or, the gap between the locating pin and the locating pin block is 0.03mm~0.05mm.

8. A film traction and winding device, characterized in that, It includes a bracket on which a take-up roller is mounted, and a positioning pin assembly as described in any one of claims 1 to 7, wherein the top of the positioning pin in the positioning pin assembly abuts against the end face of the take-up roller and is capable of rotating synchronously.

9. The film traction and winding device according to claim 8, characterized in that, The two ends of the take-up roller are respectively installed by clamps, and at least one end of the take-up roller is provided with the positioning pin assembly, and the positioning pin block of the positioning pin assembly is fixed to the clamp at the same end.

10. The film traction and winding device according to claim 9, characterized in that, It also includes a drive device, the drive end of which is coaxially connected to the take-up roller via the chuck, for driving the take-up roller to rotate.

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