Constant tension conveyance device for mounting

Abstract

This utility model belongs to the field of mounting machine technology and discloses a constant tension conveying device for mounting, including a frame. The frame is equipped with vertically distributed rollers for conveying roll materials. Each roller includes a fixed roller rotatably mounted on the frame and located at the bottom, and a movable roller slidably mounted on the frame and located at the top. A screw lifting component is provided between the movable roller and the frame. The screw lifting component is fixedly mounted on the frame, and the movable roller is located on the moving end of the screw lifting component. This invention abandons the traditional passive structure that relies on the elastic deformation of springs to adjust the distance between the upper and lower feed rollers. It innovatively introduces a screw lifting component controlled by a drive motor. The motor rotation drives the screw to move the movable roller precisely in the vertical direction, thereby realizing the programmed and linear adjustment of the distance between the fixed roller and the movable roller.

Description

Technical Field

[0001] This utility model belongs to the field of mounting machine technology, specifically relating to a constant tension conveying device for mounting. Background Technology

[0002] In the roll-to-roll assembly process, paired vertical feed rollers are typically used to stably transport the rolled material. To accommodate rolls of varying thicknesses, existing equipment commonly employs a spring-loaded structure to adjust the gap between the upper and lower feed rollers. This structure uses a pressure spring to provide elastic clamping force, allowing the feed rollers to automatically fine-tune the gap based on the roll thickness, thus achieving compatibility with different material specifications. However, in practical applications, when the roll thickness varies significantly or the feeding speed is high, the spring's hysteresis and nonlinear compression characteristics can lead to unstable pressure between the rollers. This can cause problems such as slippage, deviation, or excessive compression of the roll during transport, ultimately resulting in uncontrolled conveying tension and difficulty in maintaining a constant tension output.

[0003] Furthermore, existing roll conveying systems face significant challenges in the startup phase regarding tension control itself. Because the roll material inherently carries internal stress and initial tension in its original wound state, this unreleased or unadjusted initial tension is directly superimposed on the conveying system when it enters the feed roller system from the unwinding device. This makes it difficult to effectively control and stabilize the tension during the initial conveying stage. Especially in high-speed placement operations, this fluctuation in initial tension quickly propagates to subsequent processes, severely impacting placement accuracy and product yield.

[0004] Finally, most current roll conveying equipment relies on precision detection components such as tension sensors and photoelectric sensors to monitor and adjust the tension and position accuracy during the conveying process in real time. However, due to the aforementioned tension instability problem, the roll material is prone to shaking, trembling, or periodic slack during conveying, which directly affects the sampling accuracy of the sensors. The signals received by the sensors may generate noise or misinterpretations due to physical vibrations, causing the control system to make incorrect feedback adjustments, forming a vicious cycle of "inaccurate detection—improper adjustment—tension deterioration". Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a constant tension conveying device for mounting, so as to solve the problems existing in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is a constant tension conveying device for mounting, including a frame. The frame is equipped with vertically distributed rollers for conveying roll materials. Each roller includes a fixed roller rotatably mounted on the frame at the bottom and a movable roller slidably mounted on the frame at the top. A screw lifting component is provided between the movable roller and the frame. The screw lifting component is fixedly mounted on the frame, and the movable roller is located on the moving end of the screw lifting component. The distance between the fixed roller and the movable roller is controlled by the screw lifting component to accommodate roll materials of different thicknesses.

[0007] Preferably, the fixed roller and the moving roller are respectively provided with a first transmission gear and a second transmission gear. The first transmission gear and the fixed roller, as well as the second transmission gear and the moving roller, are coaxially connected and meshed. When the distance between the fixed roller and the moving roller changes, the first transmission gear and the second transmission gear maintain meshing and transmission through the tooth flank clearance between the gears.

[0008] Preferably, the lead screw lifting component includes a base connected to the frame, a movable block slidably disposed on the base, a transmission rod rotatably mounted on the base, the length direction of the transmission rod being the same as the sliding direction of the movable block, the transmission rod and the movable block being screwed together, the transmission rod being equipped with an independent drive motor, and a movable roller disposed on the movable block; when the drive motor drives the transmission rod to rotate, the transmission rod drives the movable block and the movable roller to move.

[0009] Furthermore, the base is also equipped with an infrared sensor, which is used to detect the position of the moving block and realize the distance feedback between the fixed roller and the moving roller.

[0010] Preferably, a vacuum adsorption roller is provided on the feed end side of the roller pair, and the vacuum adsorption roller is used to pull the material for the roller pair; the front end of the vacuum adsorption roller has a storage area, and the roll of material in the storage area is in a relaxed state, so that the roll of material in the storage area does not bear tensile tension; under the action of the storage area, tension isolation is achieved between the roll of material and the vacuum adsorption roller; the vacuum adsorption roller can independently control the traction tension and is not affected by the tension fluctuation of the roll of material, thereby achieving constant tension output.

[0011] Furthermore, a wrapping roller is provided between the vacuum adsorption roller and the fixed roller; under the action of the wrapping roller, the wrapping angle of the roll material on the fixed roller is increased, and the arc length of the roll material on the fixed roller is extended, ensuring the uniformity of the surface tension of the roll material; at the same time, the roll material vibration is avoided, thereby improving the detection accuracy of the sensor.

[0012] Preferably, a correction component is provided on the discharge end side of the rollers. The correction component includes a position sensor for feeding back the position of the rolled material and correction rods located on both sides of the length direction of the rollers. The correction rods are equipped with a horizontal displacement component for position control. The moving direction of the horizontal displacement component is the same as the length direction of the rollers. The position of the rolled material is fed back by the position sensor, and then the horizontal displacement component controls the correction rods to correct the position of the rolled material.

[0013] The main technical effects of this utility model are reflected in the following aspects:

[0014] This invention abandons the traditional passive structure that relies on the elastic deformation of springs to adjust the gap between the upper and lower feed rollers. It innovatively introduces a screw-lifting component controlled by a drive motor. The motor's rotation drives the screw, which in turn moves the moving roller precisely in the vertical direction, thus achieving programmed and linear adjustment of the gap between the stationary and moving rollers. This structure fundamentally overcomes the pressure fluctuation problem caused by nonlinear compression, elastic hysteresis, and fatigue decay of springs during rapid dynamic responses. Under different coil thicknesses or high-speed feeding conditions, the system can quickly adjust the roller gap according to preset parameters or real-time feedback signals, ensuring that the clamping force applied to the coil remains constant and controllable. This effectively avoids slippage, deviation, or excessive compression caused by unstable pressure, significantly improving the stability and repeatability of feeding, and achieving a truly "constant pressure" conveying foundation.

[0015] To address the challenge of controlling the internal stress and initial tension carried by the roll material during the initial unwinding stage, this invention incorporates a vacuum adsorption roller at the feed end of the roller assembly, with a relaxed storage area constructed in front of it. After being released from the original roll, the roll material first enters this storage area, naturally releasing its internal stress in a tension-free state, thus preventing the direct transmission of the initial tension to the subsequent conveying system. Subsequently, the roll material is adsorbed onto the surface of the vacuum adsorption roller and pulled forward at a set speed by an independent drive motor. Because the traction action occurs in a stable region where the tension has been released, the traction process is unaffected by upstream fluctuations, allowing for the precise establishment and maintenance of a constant output tension. This structure achieves physical isolation between the "tension source" and the "traction system," solving the technical problem of tension loss of control during the startup phase of traditional equipment, and providing stable and predictable material input conditions for high-precision mounting.

[0016] By adding a wrapping roller between the vacuum adsorption roller and the stationary roller, the wrapping angle and contact arc length of the coiled material on the stationary roller are significantly increased by altering the material's travel path. The larger wrapping angle not only enhances the friction between the material and the roller surface, preventing slippage during high-speed operation, but more importantly, it ensures a more uniform tension distribution along the material's width, reducing edge slack or warping. Simultaneously, the wrapping roller acts as a mechanical guide and damper, effectively suppressing vibrations, tremors, and periodic slack caused by tension fluctuations or speed changes during material transport. This improvement in physical stability directly improves the working environment of downstream detection components such as tension sensors and photoelectric sensors, reducing signal noise, increasing sampling accuracy, and preventing misjudgments and incorrect adjustments due to vibration interference, thereby ensuring the accuracy and reliability of the entire closed-loop control system. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram illustrating the combination of the present invention and the rolled material;

[0019] Figure 3 for Figure 1 Structural diagram of the middle roller;

[0020] Figure 4 for Figure 1 Schematic diagram of the structure of the lead screw lifting component;

[0021] Figure 5 for Figure 4 Independent structural diagram of the lead screw lifting component;

[0022] Figure 6 for Figure 1 Structural diagram of the center correction component;

[0023] In the diagram: 1. Frame; 2. Double rollers; 21. Fixed roller; 22. Moving roller; 23. First transmission gear; 24. Second transmission gear; 3. Screw lifting component; 31. Base; 32. Moving block; 33. Transmission rod; 34. Drive motor; 35. Infrared sensor; 4. Vacuum adsorption roller; 5. Material storage area; 6. Corner roller; 7. Correction component; 71. Correction rod; 72. Horizontal displacement component. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of this utility model easier to understand and master. In the embodiments, it should be understood that the terms "middle," "upper," "lower," "top," "right side," "left end," "above," "back," "center," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model, 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, and therefore should not be construed as a limitation of this utility model. In addition, unless otherwise specified in this specific embodiment, the connection or fixing method between components can be achieved by bolt fixing, pin fixing, or pin connection, etc., which are commonly used in the prior art. Therefore, they will not be described in detail in this embodiment.

[0025] Furthermore, as is common knowledge in this industry, the fixed roller 21 mentioned above is equipped with an independent motor drive, and the horizontal displacement component 72 can be a slide table, telescopic rod, or other components. Since this is common knowledge, its principles and structure will not be elaborated upon further.

[0026] Example 1

[0027] See Figure 1 This embodiment discloses a constant tension conveying device for mounting, which aims to solve key technical problems in existing roll material conveying systems, such as tension instability, feeding slippage, positioning deviation, and decreased control accuracy caused by issues such as lag in the response of the spring pressure structure, transmission of initial tension fluctuations, and inaccurate sensor detection. It includes a frame 1, on which are vertically distributed rollers 2 for roll material conveying. Each roller 2 includes a fixed roller 21 rotatably mounted on the frame 1 at the bottom and a movable roller 22 slidably mounted on the frame 1 at the top. In the design of the roller 2 structure, this embodiment abandons the traditional passive adjustment method relying on spring elastic compression and adopts a scheme in which the position of the movable roller 22 is actively controlled by a screw lifting component 3 driven by a drive motor 34. Specifically, a screw lifting component 3 is provided between the moving roller 22 and the frame 1. The screw lifting component 3 is fixedly installed on the frame 1, and the moving roller 22 is located on the moving end of the screw lifting component 3. The distance between the fixed roller 21 and the moving roller 22 is controlled by the screw lifting component 3 to accommodate the conveying of rolls of different thicknesses. When it is necessary to accommodate rolls of different thicknesses, the control system starts the drive motor 34 according to preset parameters or real-time feedback signals, driving the screw to rotate, thereby precisely controlling the moving block 32 and the moving roller 22 connected to it to rise and fall smoothly in the vertical direction, achieving precise adjustment of the distance between the fixed roller 21 and the moving roller 22.

[0028] See Figure 4 , Figure 5The lead screw lifting component 3 includes a base 31 connected to the frame 1. A movable block 32 is slidably mounted on the base 31. A transmission rod 33 is rotatably mounted on the base 31. The length direction of the transmission rod 33 is the same as the sliding direction of the movable block 32. The transmission rod 33 and the movable block 32 are screwed together. The transmission rod 33 is equipped with an independent drive motor 34. The moving roller 22 is mounted on the movable block 32. When the drive motor 34 drives the transmission rod 33 to rotate, the transmission rod 33 drives the movable block 32 and the moving roller 22 to move. The base 31 is also equipped with an infrared sensor 35, which is used to detect the position of the movable block 32 and realize the distance feedback between the fixed roller 21 and the moving roller 22. By replacing the traditional passive pressure structure of "spring + lever" with the active drive of "motor + lead screw", the inherent defects of springs under rapid dynamic response, such as nonlinear compression, fatigue decay, and hysteresis response, are fundamentally overcome. By programmatically controlling the speed and direction of the drive motor 34, real-time, linear, and predictable adjustment of the pressure between the rollers 2 can be achieved. This ensures that stable contact pressure is maintained under different roll thicknesses and high-speed operating conditions, effectively preventing slippage, extrusion deformation, or conveying interruption caused by pressure fluctuations. This significantly improves the smoothness of feeding and the repeatability of positioning.

[0029] See Figure 3 Furthermore, to improve the synchronization and reliability of the transmission system, in this embodiment, the fixed roller 21 and the moving roller 22 are respectively equipped with a first transmission gear 23 and a second transmission gear 24. The first transmission gear 23 and the fixed roller 21, as well as the second transmission gear 24 and the moving roller 22, are coaxially connected. The first transmission gear 23 and the second transmission gear 24 mesh to form a synchronous transmission chain. When the moving roller 22 moves up and down with the screw, although the distance between the two rollers changes, the meshing relationship is not disrupted due to the reasonable tooth flank clearance between the gears. This ensures that power is smoothly transmitted from the fixed roller 21 to the moving roller 22, achieving synchronous rotation of the upper and lower rollers. This structure satisfies the requirement of adjustable distance while ensuring the continuity and stability of the transmission, avoiding the slack, skipped teeth, or slippage that may occur when the distance changes in traditional belt or chain transmissions. That is, when the distance between the fixed roller 21 and the moving roller 22 changes, the first transmission gear 23 and the second transmission gear 24 maintain meshing transmission through the tooth flank clearance between the gears.

[0030] See Figure 2Furthermore, a vacuum adsorption roller 4 is provided on the feed end side of the roller 2. The vacuum adsorption roller 4 can be selected from the vacuum adsorption roller 4 of application number CN202510187107.X or the vacuum adsorption roller 4 in the coil processing equipment. The vacuum adsorption roller 4 is used to pull the material for the roller 2. The front end of the vacuum adsorption roller 4 has a storage area 5. The coil material in the storage area 5 is in a relaxed state, so that the coil material in the storage area 5 does not bear tensile tension. Under the action of the storage area 5, tension isolation is achieved between the coil roller and the vacuum adsorption roller 4. The vacuum adsorption roller 4 can independently control the traction tension and is not affected by the tension fluctuation of the coil material, thereby achieving constant tension output. As for how to make the coil material in a relaxed state when it reaches the storage area 5, specifically, the coil unloading roller can actively release a portion of the coil material into the storage area 5.

[0031] After being released from the original roll, the material first enters the storage area 5 and remains in a relaxed state, without bearing any tensile tension. Subsequently, the material is introduced into the vacuum adsorption roller 4, where it is firmly adhered to the roller surface through negative pressure adsorption. The vacuum adsorption roller 4 is driven by an independent motor, allowing for precise setting of traction speed and force according to process requirements. Due to the presence of the storage area 5, the internal stress and initial tension carried by the original roll are effectively isolated and naturally released at this stage, no longer directly transmitted to the subsequent conveying system. Therefore, the vacuum adsorption roller 4 can independently establish and maintain a constant traction tension, unaffected by upstream tension fluctuations, thus achieving true "tension isolation" and "constant tension output." Traditional systems often neglect the release of initial tension, leading to uncontrolled tension during startup. This solution, through physical structural design, decouples the tension source, greatly improving the stability of the system's startup response, making it particularly suitable for high-precision, high-speed mounting operations.

[0032] See Figure 1To further improve the stability of the coil operation and optimize the detection environment, a wrapping roller 6 is provided between the vacuum adsorption roller 4 and the fixed roller 21. Under the action of the wrapping roller 6, the wrapping angle of the coil on the fixed roller 21 is increased, and the arc length of the coil around the fixed roller 21 is extended, ensuring the uniformity of the surface tension of the coil. At the same time, it avoids coil vibration, thereby improving the detection accuracy of the sensor. The wrapping roller 6 is located in the transition area of ​​the coil path. Its function is to change the direction of the coil, increase its wrapping angle on the fixed roller 21, and extend the contact arc length. The larger wrapping angle not only enhances the friction between the coil and the fixed roller 21 and prevents slippage, but more importantly, it makes the tension distribution more uniform along the width direction of the material, reducing edge warping or local relaxation. At the same time, the wrapping roller 6 plays a mechanical damping role on the coil, suppressing the shaking, trembling, and periodic vibrations common in high-speed operation, and significantly improving the dynamic stability during the conveying process. For precision detection components such as tension sensors and photoelectric sensors installed downstream, this means clearer and more stable signal input, avoiding signal noise and misjudgment caused by physical vibration, thereby breaking the vicious cycle of "inaccurate detection - improper adjustment - tension deterioration" and improving the robustness and accuracy of the entire closed-loop control system.

[0033] See Figure 6 Finally, a correction component 7 is provided on the discharge end side of the roller 2. The correction component 7 includes a position sensor for feeding back the position of the rolled material and correction rods 71 ​​located on both sides of the length direction of the roller 2. The correction rods 71 ​​are equipped with a horizontal displacement component 72 for position control. The moving direction of the horizontal displacement component 72 is the same as the length direction of the roller 2. The position of the rolled material is fed back by the position sensor. When the position sensor detects that the rolled material has deviated, the control system immediately calculates the deviation and drives the correction rods 71 ​​on the corresponding side to make fine adjustments. By changing the local guide angle, the rolled material is forced to return to the center position, thereby achieving dynamic correction.

[0034] Of course, the above are just typical examples of this utility model. In addition, this utility model can have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A constant tension conveying device for mounting, characterized in that, The machine includes a frame on which a pair of rollers for conveying rolled material are arranged vertically. The pair of rollers includes a fixed roller rotatably mounted on the frame at the bottom and a movable roller slidably mounted on the frame at the top. A lead screw lifting component is provided between the moving roller and the frame. The lead screw lifting component is fixedly installed on the frame, and the moving roller is located on the moving end of the lead screw lifting component. The distance between the fixed roller and the moving roller is controlled by the lead screw lifting component to accommodate the conveying of rolls of different thicknesses.

2. The constant tension conveying equipment for mounting as described in claim 1, characterized in that: The fixed roller and the moving roller are respectively provided with a first transmission gear and a second transmission gear. The first transmission gear and the fixed roller and the second transmission gear and the moving roller are coaxially connected and meshed. When the distance between the fixed roller and the moving roller changes, the first transmission gear and the second transmission gear maintain meshing transmission through the tooth flank clearance between the gears.

3. The constant tension conveying equipment for mounting as described in claim 1, characterized in that, The lead screw lifting component includes a base connected to the frame, a movable block slidably disposed on the base, a transmission rod rotatably mounted on the base, the length direction of the transmission rod being the same as the sliding direction of the movable block, the transmission rod and the movable block being screwed together, the transmission rod being equipped with an independent drive motor, and the moving roller being disposed on the movable block; When the drive motor drives the transmission rod to rotate, the transmission rod drives the moving block and the moving roller to move.

4. The constant tension conveying equipment for mounting as described in claim 3, characterized in that: The base is also equipped with an infrared sensor, which is used to detect the position of the moving block and realize the distance feedback between the fixed roller and the moving roller.

5. The constant tension conveying equipment for mounting as described in claim 1, characterized in that: A vacuum adsorption roller is provided on the feed end side of the roller pair, and the vacuum adsorption roller is used to pull the material for the roller pair; The front end of the vacuum adsorption roller has a material storage area, and the roll of material in the material storage area is in a relaxed state, so that the roll of material in the material storage area does not bear tensile tension. Under the action of the storage area, tension isolation is achieved between the winding roller and the vacuum adsorption roller; the vacuum adsorption roller can independently control the traction tension and is not affected by the tension fluctuation of the winding material, thereby achieving constant tension discharge.

6. The constant tension conveying equipment for mounting as described in claim 5, characterized in that: An angle wrapping roller is provided between the vacuum adsorption roller and the stationary roller; Under the action of the wrapping roller, the wrapping angle of the coiled material on the fixed roller is increased, and the arc length of the coiled material on the fixed roller is extended, ensuring the uniformity of the surface tension of the coiled material; at the same time, the coiled material vibration is avoided, thereby improving the detection accuracy of the sensor.

7. The constant tension conveying equipment for mounting as described in claim 1, characterized in that: The discharge end side of the rollers is provided with a correction component. The correction component includes a position sensor for feeding back the position of the rolled material and correction rods located on both sides of the length direction of the rollers. The correction rods are equipped with a horizontal displacement component for position control. The moving direction of the horizontal displacement component is the same as the length direction of the rollers. The position sensor provides feedback on the position of the roll material, and the horizontal displacement component controls the correction rod to correct the position of the roll material.

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