Micro-tension displacement control mechanism for rubber sheet
By using the linkage structure of the servo device and the coupling, the problems of insufficient adjustment accuracy and control lag in the traditional micro-tension system are solved, realizing precise tension control and automatic switching of the film, thereby improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI TENGYU MASCH & TECH CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional micro-tension systems are insufficient in terms of adjustment accuracy and control lag, and cannot meet the needs of high-precision film production. They are particularly inconvenient to switch between multiple types of film and are prone to causing film stretching or wrinkling.
The system employs a linkage structure between a servo device and a coupling, and achieves precise control of the swing roller through a disconnectable torque transmission mechanism. Combined with the adjustability of the counterweight device and the automatic switching function of the servo device, it ensures the flatness and thickness accuracy of the film.
It achieves precise tension control of film, improves production efficiency and product quality, and solves the problems of insufficient adjustment accuracy and control lag in traditional systems.
Smart Images
Figure CN224132378U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rubber sheet production and conveying control technology, and in particular relates to a rubber sheet micro-expansion displacement control mechanism. Background Technology
[0002] Traditional micro-tension systems adjust the tension by changing the weight of a counterweight. However, thin films require precise counterweight balance, and the adjustment of the counterweights lacks the necessary precision to meet the demands of high-precision films. Thicker films are heavier and may require additional counterweights. Switching between different types of films is inconvenient, especially for narrow and thin products where even slight counterweight deviations can cause stretching or wrinkling. Some systems use pneumatic devices to adjust the counterweight, requiring angle displacement sensors to determine the position of the swing roller and a pneumatic pressure regulating valve to adjust the micro-tension value and control the switching between working and non-working positions. However, these systems cannot limit the maximum or minimum swing amplitude, and the cylinders themselves have damping, causing a lag in micro-tension control, reducing the accuracy of the micro-tension value, and resulting in irregular stretching of the film, affecting its flatness and thickness accuracy. Summary of the Invention
[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a rubber sheet micro-tension displacement control mechanism. Through the linkage structure of servo device and coupling, it solves the problems of insufficient adjustment accuracy of traditional counterweight and lag of pneumatic control, and realizes automatic switching of working mode and precise control of tension.
[0004] Technical solution: To achieve the above objectives, this utility model provides a micro-expansion displacement control mechanism for rubber sheets, including a swing shaft supported by a fixed bearing seat, a counterweight device connected to one side of the swing shaft, and a swing roller connected to the other side via a swing rod, and also includes a servo device and a coupling; the output shaft of the servo device is connected to the swing shaft via the coupling, and the coupling is a disconnectable torque transmission mechanism;
[0005] With the coupling disconnected and torque transmission in the state, the counterweight device drives the swing roller to swing up to the non-working position away from the pressure sheet, and balances the swing roller to the electrical zero position;
[0006] When the coupling is connected and torque is transmitted, the servo device can drive the swing roller to swing down to the working position of pressing the film, and control the speed matching of the preceding and following processes by setting a micro-tension value.
[0007] Furthermore, the swing roller is arranged parallel to the axis of the swing shaft, and the counterweight device is located near either end of the swing shaft, so that the counterweight device is offset from the transmission path of the film and located to its side.
[0008] Furthermore, the oscillating roller can be slowly lifted from the working position to the working equilibrium position by the difference in linear speed between the conveyed film and the preceding and following processes.
[0009] Furthermore, the swing arm is a length-adjustable rod structure, and when used for thin film, the swing shaft is lengthened to reduce the swing angle.
[0010] Furthermore, the counterweight of the counterweight device can be increased or decreased to counteract the weight of the swing roller when the electrical position is zero, so that the output signal of the servo device is zero.
[0011] Furthermore, the coupling is a torque-limiting coupling, which automatically disconnects when the transmitted torque exceeds a threshold.
[0012] Furthermore, the oscillating roller is rotatably connected to the swing rod via a roller shaft, and the roller surface of the oscillating roller is wrapped with an anti-sticking structural belt.
[0013] Furthermore, the servo device is equipped with a signal-insensitive band at the working balance position. When the swing roller fluctuates within a set swing amplitude, the output control signal is stopped to suppress the oscillation of the swing roller.
[0014] Furthermore, the servo device is connected to an external controller to collect and store swing angle, micro-tension set value and swing amplitude over-limit data in real time, and transmit them to the MES system.
[0015] Beneficial effects: In the torque transmission state when the coupling is disconnected, the counterweight device drives the swing roller to swing upward to the non-working position away from the pressure sheet, balancing the swing roller to the electrical zero position; in the torque transmission state when the coupling is connected, the servo device can drive the swing roller to swing downward to the working position of the pressure sheet, and control the speed matching of the preceding and following processes by setting a micro-tension value; the servo device can realize the setting of the swing angle and limit its maximum and minimum swing amplitude, set the micro-tension value and control the speed matching of the preceding and following processes through this value, switch the working position and non-working position, and automatically adjust the micro-tension setting value when the swing roller exceeds the set swing amplitude. The servo device and the coupling are linked, which solves the problems of insufficient adjustment accuracy and pneumatic control lag in traditional counterweights, and realizes automatic switching of working mode and precise control of tension. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the present invention in its working state. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings.
[0019] like Figure 1and Figure 2 As shown, a micro-expansion displacement control mechanism for a rubber sheet includes a swing shaft 2 supported by a fixed bearing seat 1. One side of the swing shaft 2 is connected to a counterweight device 3, and the other side is connected to a swing roller 5 via a swing rod 4. It also includes a servo device 6 and a coupling 7. The output shaft of the servo device 6 is connected to the swing shaft 2 via the coupling 7, which is a disconnectable torque transmission mechanism. When the torque transmission is disconnected, the counterweight device 3 drives the swing roller 5 to swing upwards to a non-working position away from the pressed rubber sheet 10, balancing the swing roller 5 to electrical zero. When the torque transmission is connected, the servo device 6 can drive the swing roller 5 downwards to a working position pressing down on the rubber sheet 10. The speed matching between the preceding and following processes is controlled by setting a micro-expansion value. The wedge degree of speed matching is entirely determined by the stability of the micro-expansion transmission and PID control. In this patent application, the servo device 6 is configured to perform the following functions:
[0020] a) Set the swing angle of the swing roller 5 and limit its maximum and minimum swing amplitude;
[0021] b) Set the micro-tension value and use this value to control the speed matching of the preceding and following processes;
[0022] c) Switch between working and non-working positions;
[0023] d) When the swing roller 5 exceeds the set swing amplitude, the micro-tension setting value is automatically adjusted.
[0024] By using the linkage structure between the servo device 6 and the coupling 7, the problems of insufficient adjustment accuracy and lag in pneumatic control in traditional counterweights are solved, and the automatic switching of working modes and precise control of tension are achieved.
[0025] The oscillating roller 5 is arranged parallel to the axis of the oscillating shaft 2, and the counterweight device 3 is positioned near either end of the oscillating shaft 2, so that the counterweight device 3 is offset from the transmission path of the film 10 and located to its side. The counterweight device 3 does not overlap with the film path, which can accommodate the production of wider films, while the traditional central counterweight method requires frequent disassembly.
[0026] The oscillating roller 5 can be slowly lifted from the working position to the working balance position by the difference in linear speed between the film 10 in the conveying state and the preceding and following processes.
[0027] The swing arm 4 is an adjustable-length rod structure. When used with thin film, the swing shaft 2 is lengthened to reduce the swing angle. For thin film, the length of the swing arm 4 needs to be appropriately increased to reduce the swing angle while maintaining the same swing amplitude, thus reducing the impact of signal fluctuations on film stretching. The swing arm 4 can be a manually telescopic rod sequentially sleeved and positioned by locating pins. When automation of adjustment and improved adjustment accuracy and efficiency are required, an electrically operated telescopic rod is preferred.
[0028] The counterweight of the counterweight device 3 can be increased or decreased to counteract the weight of the swing roller 5 when the electrical position is zero, so that the output signal of the servo device 6 is zero. The counterweight device 3 includes a screw and a counterweight. The counterweight is mounted on the screw and limited by a nut. The screw is perpendicularly connected to the swing shaft 2.
[0029] The coupling 7 is a torque-limiting coupling, which automatically disconnects when the transmitted torque exceeds the threshold, thus achieving overload protection.
[0030] The oscillating roller 5 is rotatably connected to the swing rod 4 via a roller shaft. In order to avoid sticking to the film 10, the roller surface of the oscillating roller 5 is wrapped with an anti-sticking structural belt. The anti-sticking structural belt is made of high-temperature resistant and corrosion-resistant MC nylon material or polytetrafluoroethylene coating.
[0031] The servo device 6 has a signal-insensitive band at the working balance position. When the swing roller 5 fluctuates within a set amplitude, it stops outputting control signals to suppress the oscillation of the swing roller 5. The signal-insensitive band means no signal output. By setting a signal-insensitive band within a small range at the working balance position, the position of the swing roller 5 can be stabilized, preventing the swing roller 5 from oscillating.
[0032] The servo device 6 is connected to an external controller to collect and store swing angle, micro-tension set value and swing amplitude over-limit data in real time, and transmit them to the MES system.
[0033] Initially, the micro-tension displacement control mechanism of this invention is in a non-working position, mainly to avoid the film 10 being affected by the swing roller 5 during manual traction. First, the initial micro-tension value is set by the controller of the servo device 6. After the film 10 passes through the micro-tension displacement control mechanism, the servo device 6 switches to the working position. Before the swing roller 2 contacts the film 10, it is not subjected to the pulling force of the film 10, so the position of the swing roller 2 will be slightly below the working position.
[0034] When in the working equilibrium position, the signal output of servo device 6 is close to zero, with no output signal.
[0035] When in the working position, the output signal of the servo device 7 is positive. This output signal is superimposed on the input signal of the subsequent process to increase the linear speed of the subsequent process.
[0036] By varying the linear speed between the two processes, the oscillating roller 5 is gradually lifted, and the output signal of the servo device 6 gradually decreases until it approaches zero at the working equilibrium position. By setting a signal insensitivity band (i.e., no signal output) within a small range of the working equilibrium position, the position of the oscillating roller 5 can be stabilized, preventing oscillation. This process has switched to PID control, and the entire system enters a stable production state.
[0037] When the initial micro-tension force value is not set properly, the micro-tension force displacement control mechanism will exhibit irregular oscillations.
[0038] First, the maximum (upper) and minimum (lower) swing positions are set by the servo device 6. When the swing roller 5 exceeds the maximum (upper) swing, it indicates that the film 10 is thicker and heavier. At this time, the servo device 6 outputs a signal to the controller, which automatically increases (adds) the micro tension setting value according to the program setting. And every time the swing roller 5 exceeds the maximum (upper) swing, the micro tension setting value is automatically increased (adds) according to the program setting until the swing roller 5 works within the maximum (upper) swing.
[0039] When the swing roller 5 exceeds the minimum (lower) swing amplitude, it indicates that the film is thin and light and easy to stretch. At this time, the servo device 6 outputs a signal to the controller, which automatically reduces the micro tension setting value according to the program setting. And every time the swing roller 5 exceeds the minimum (lower) swing amplitude, the micro tension setting value is automatically reduced according to the program setting until the swing roller 5 works within the minimum (lower) swing amplitude.
[0040] The data from the entire adjustment process will be output to the background storage via the controller for the MES system to access, enabling the collection and monitoring of the product process in a visual and digital manner.
[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A micro-expansion displacement control mechanism for a rubber sheet, comprising a swing shaft (2) supported by a fixed bearing seat (1), a counterweight device (3) connected to one side of the swing shaft (2), and a swing roller (5) connected to the other side via a swing rod (4), characterized in that: It also includes a servo device (6) and a coupling (7); the output shaft of the servo device (6) is connected to the swing shaft (2) via the coupling (7), and the coupling (7) is a disconnectable torque transmission mechanism; When the coupling (7) is disconnected from the torque transmission state, the counterweight device (3) drives the swing roller (5) to swing up to the non-working position away from the pressure sheet (10), and balances the swing roller (5) to the electrical zero position; When the coupling (7) is connected to transmit torque, the servo device (6) can drive the swing roller (5) to swing down to the working position of the pressing film (10), and control the speed matching of the preceding and following processes by setting the micro-tension value.
2. A micro-expansion force displacement control mechanism for a rubber sheet according to claim 1, characterized in that: The swing roller (5) is arranged parallel to the axis of the swing shaft (2), and the counterweight device (3) is arranged near one end of the swing shaft (2), so that the counterweight device (3) is deviated from the transmission path of the film (10) and located on its side.
3. The micro-expansion force displacement control mechanism for a rubber sheet according to claim 1, characterized by: The oscillating roller (5) can be slowly lifted from the working position to the working balance position by the difference in linear speed between the film (10) in the conveying state and the preceding and following processes.
4. The micro-expansion force displacement control mechanism for a rubber sheet according to claim 1, characterized by: The swing arm (4) is a length-adjustable rod structure. When used for thin film, the swing shaft (2) is lengthened to reduce the swing angle.
5. The rubber sheet micro-tension displacement control mechanism according to claim 1, characterized in that: The counterweight of the counterweight device (3) can be increased or decreased to counteract the weight of the swing roller (5) when the electrical position is zero, so that the output signal of the servo device (6) is zero.
6. The micro-expansion force displacement control mechanism for a rubber sheet according to claim 1, characterized by: The coupling (7) is a torque-limiting coupling that automatically disconnects when the transmitted torque exceeds the threshold.
7. The micro-elastic force deflection control mechanism for a rubber slab as defined in claim 1, wherein: The swing roller (5) is rotatably connected to the swing rod (4) via a roller shaft, and the roller surface of the swing roller (5) is wrapped with an anti-sticking structure belt.
8. The micro-expansion force displacement control mechanism for a rubber sheet according to claim 1, characterized by: The servo device (6) is equipped with a signal-insensitive band at the working balance position. When the swing roller (5) fluctuates within the set swing amplitude, it stops outputting control signals to suppress the oscillation of the swing roller (5).
9. The micro-elastic force deflection control mechanism for a rubber slab as defined in claim 1, wherein: The servo device (6) is connected to an external controller to collect and store swing angle, micro-tension set value and swing amplitude over-limit data in real time, and transmit them to the MES system.