Sponge pressing device and control method thereof

Abstract

The invention relates to a sponge pressing device and a control method thereof.The sponge pressing device comprises a servo electric cylinder, a fixing base, an inflation base, an upper chuck, a capsule and a lower chuck, the servo electric cylinder is fixedly connected with the fixing base through screws, the inflation base is fixedly connected with the fixing base through screws, the upper chuck is fixedly connected with the inflation base through self-made threads, and the capsule is fixedly connected with the upper chuck through self-made threads; the lower chuck is fixedly connected with an extension rod of the servo electric cylinder through a screw, and the capsule is fixedly connected with the upper chuck and the lower chuck through clamping grooves. The servo electric cylinder drives the lower chuck to vertically move up and down, and the stroke of the servo electric cylinder can be set according to the height of a tire so as to adapt to different tire heights. According to the invention, the quality of produced tires is improved.

Description

Technical Field

[0001] The invention relates to the field of tire production auxiliary equipment, and in particular to a sponge pressing device and a control method thereof. Background Art

[0002] With the popularization of new energy vehicles such as electric vehicles, traditional tires can no longer meet the requirements of new energy vehicles for tire quietness due to excessive tire noise. In recent years, tire manufacturers have been committed to the research and development of silent tires, and some car companies have equipped new energy vehicles with silent tires. In the process of manufacturing tires, it is one of the most critical processes to press the silent material with stable and reliable silent sponge.

[0003] After investigation, it was found that the current tire uses a mechanical expansion structure when laminating the silent sponge. Since the mechanical expansion structure cannot perfectly expand the silent sponge into a full circle, the silent sponge and the tire are not pressed evenly, resulting in a decrease in tire quality. Therefore, the pressing quality of the silent sponge in the existing technology needs to be improved. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a tire inner wall silent sponge pressing device, which can realize uniform pressing of the silent sponge to the inner wall of the tire.

[0005] To achieve the purpose, the present invention adopts the following technical scheme: a sponge pressing device, including a servo electric cylinder, a fixed seat, an inflation seat, an upper chuck, a capsule, and a lower chuck. The servo electric cylinder is fixed to the fixed seat by screws, the inflation seat is fixed to the fixed seat by screws, the upper chuck is fixed to the inflation seat by self-made threads, the lower chuck is fixed to the servo electric cylinder extension rod by screws, and the capsule is fixed to the upper chuck and the lower chuck by a slot; the servo electric cylinder drives the lower chuck to move vertically up and down, and the servo electric cylinder stroke can be set according to the tire height to adapt to different tire heights.

[0006] Furthermore, compressed air is introduced into the inflation seat to expand the capsule radially, so as to push the sponge into the inner wall of the tire to achieve the sponge pressing effect.

[0007] A control method for a tire silent cotton conveying device, the method comprising the following steps:

[0008] A sensor for real-time monitoring of the internal pressure of the capsule is installed on the capsule;

[0009] According to the tire specifications and sponge pressing requirements, set the target pressure value that the bladder needs to reach;

[0010] The current pressure value of the capsule is read in real time by the pressure sensor, and the deviation between the current pressure value and the set point is calculated;

[0011] Based on the deviation, the PID algorithm is used to calculate the control quantity, that is, the opening degree or switching time of the solenoid valve;

[0012] According to the control quantity calculated by PID, the flow rate of compressed air entering the capsule is adjusted through the solenoid valve, and this process is repeated continuously until the pressure of the capsule stabilizes near the set point and meets the pressing requirements; when the preset pressing time or pressure stabilization time is reached, the solenoid valve is closed to end the inflation process.

[0013] Furthermore, a sensor for real-time monitoring of the internal pressure of the capsule is installed on the capsule, including:

[0014] Define a genetic encoding method to represent the sensor location, and randomly generate an initial population containing multiple individuals, i.e., multiple sensor layout schemes;

[0015] For each individual, its fitness is calculated through the fitness function;

[0016] According to the result of the fitness function, select individuals with corresponding fitness in the population to enter the next generation;

[0017] Two parent individuals are randomly selected, and new offspring individuals are generated through single-point crossover. The genes of the offspring individuals are randomly mutated with a certain probability until the termination condition is met. The corresponding individuals finally obtained are decoded into the actual sensor installation position, and the pressure sensor is installed on the capsule according to the sensor installation position.

[0018] Furthermore, the calculation formula of the fitness function is:

[0019]

[0020] Among them, F(x) is the fitness value of individual x; α is a weight coefficient; M represents the number of sensors selected in individual x, that is, the number of 1s in the binary code; and They represent the true pressure value and sensor reading at the i-th sensor position, respectively; β is a weight coefficient; C(x) represents the number of sensors installed in individual x, that is, the number of 1s in the binary code; γ is a weight coefficient; d ij represents the distance between the i-th and j-th sensor positions; is the total number of sensor position pairs used to calculate the average of the distances between all sensors.

[0021] The technical solution of the present invention brings the following beneficial effects:

[0022] Through screws and self-made threads, the various parts of the device (servo electric cylinder, fixed seat, inflatable seat, upper chuck, capsule, lower chuck) are firmly connected together to ensure the stability and durability of the overall structure. The introduction of the servo electric cylinder enables the lower chuck to move vertically up and down, and the movement stroke can be adjusted according to the tire height. This design not only meets the production needs of tires of different specifications, but also improves the flexibility and adaptability of the production line. Through simple mechanical adjustments and settings, fast adaptation to different tire heights can be achieved without complicated modifications or replacement of parts, thereby simplifying the operation process and improving work efficiency.

[0023] The design of the device takes into account possible future upgrades and expansion needs. For example, the performance can be further improved by replacing or upgrading the servo cylinder, or more advanced functions can be achieved by adding additional sensors and control systems. Through reasonable mechanical design and component selection, the device achieves high performance while also taking into account cost-effectiveness. Its modular design makes maintenance and repair easier, reducing long-term operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional view of the structure of the present invention

[0025] Among them: 1. Servo electric cylinder; 2. Fixed seat; 3. Inflatable seat; 4. Upper chuck; 5. Capsule; 6. Lower chuck. DETAILED DESCRIPTION

[0026] Combine the following Figure 1 The specific embodiments of the present invention are described in further detail.

[0027] like Figure 1 As shown, a sponge pressing device includes a servo electric cylinder 1, a fixing seat 2, an inflation seat 3, an upper chuck 4, a capsule 5, and a lower chuck 6. The servo electric cylinder 1 is fixedly connected to the fixing seat 2 by screws, the inflation seat 3 is fixedly connected to the fixing seat 2 by screws, the upper chuck 4 is fixedly connected to the inflation seat 3 by self-made threads, the lower chuck 6 is fixedly connected to the servo electric cylinder extension rod 1 by screws, and the capsule is fixedly connected to the upper chuck 4 and the lower chuck 6 by a slot; the servo electric cylinder 1 drives the lower chuck 6 to move vertically up and down, and the servo electric cylinder stroke can be set according to the tire height to adapt to different tire heights; compressed air is introduced into the inflation seat 3 to expand the capsule 5 radially, and the sponge is supported into the inner wall of the tire to achieve the sponge pressing effect.

[0028] In the embodiment of the present invention, the various parts of the device (servo electric cylinder, fixed seat, inflatable seat, upper chuck, capsule, lower chuck) are firmly connected together by connection methods such as screws and self-made threads, ensuring the stability and durability of the overall structure. The introduction of the servo electric cylinder enables the lower chuck to move vertically up and down, and the movement stroke can be adjusted according to the tire height. This design not only meets the production needs of tires of different specifications, but also improves the flexibility and adaptability of the production line. Through simple mechanical adjustment and setting, rapid adaptation to different tire heights can be achieved without complicated modification or replacement of parts, thereby simplifying the operation process and improving work efficiency. The design of the device takes into account possible future upgrades and expansion needs. For example, the performance can be further improved by replacing or upgrading the servo electric cylinder, or more advanced functions can be achieved by adding additional sensors and control systems. Through reasonable mechanical design and component selection, the device achieves high performance while taking into account cost-effectiveness. Its modular design makes maintenance and repair easier and reduces long-term operating costs.

[0029] A control method for a tire silent cotton conveying device, the method comprising the following steps:

[0030] A sensor for real-time monitoring of the internal pressure of the capsule is installed on the capsule 5;

[0031] According to the tire specifications and sponge pressing requirements, set the target pressure value that the capsule 5 needs to reach;

[0032] The current pressure value of the capsule 5 is read in real time by the pressure sensor, and the deviation between the current pressure value and the set point is calculated;

[0033] Based on the deviation, the PID algorithm is used to calculate the control quantity, that is, the opening degree or switching time of the solenoid valve;

[0034] According to the control quantity calculated by PID, the flow rate of compressed air entering the capsule 5 is adjusted through the solenoid valve, and this process is repeated continuously until the pressure of the capsule 5 stabilizes near the set point and meets the pressing requirements; when the preset pressing time or pressure stabilization time is reached, the solenoid valve is closed to end the inflation process.

[0035] In an embodiment of the present invention, by real-time monitoring of the pressure inside the capsule and calculating the control amount using a PID algorithm, the method can achieve precise control of the pressure inside the capsule. This helps to ensure that the tire silent foam is subjected to uniform and appropriate pressure during the lamination process, thereby improving product quality. The method can flexibly set the target pressure value according to the tire specifications and the sponge lamination requirements, so that the device can adapt to the production needs of tires of different specifications. This adaptability improves the flexibility and diversity of the production line. By continuously adjusting the solenoid valve to control the flow of compressed air entering the capsule, the method can quickly and smoothly stabilize the capsule pressure near the set point. This not only improves production efficiency, but also ensures the stability and consistency of the lamination process. By accurately controlling the compressed air flow, the method avoids unnecessary energy waste. When the preset lamination time or pressure stabilization time is reached, the solenoid valve will be closed in time, thereby further saving energy and reducing environmental emissions. Accurate pressure control and a stable lamination process help to improve the quality of tire silent foam, reduce the defective rate, and improve customer satisfaction. The method realizes automated control, reduces the requirements for the skill level of the operator, and reduces the possibility of human intervention and errors.

[0036] When applied specifically, the following steps are included:

[0037] According to the working pressure range and accuracy requirements of capsule 5, select a suitable pressure sensor. The sensor should be able to monitor the pressure changes inside the capsule in real time and transmit these data to the control system. Determine the best installation position of the sensor on capsule 5. This position should ensure that the sensor can accurately sense the pressure inside the capsule while avoiding interference from external factors. According to the installation instructions of the sensor, fix it on capsule 5 and perform necessary wiring work. Ensure that the connection between the sensor and the control system is stable and reliable. The operator enters the specification information of the tire currently being produced through the interface of the control system. According to the tire specifications and the technical requirements of sponge pressing, the control system automatically calculates or the operator manually sets the target pressure value that capsule 5 needs to reach. This value will serve as the benchmark for subsequent pressure control. The control system obtains the current pressure value of capsule 5 from the pressure sensor in real time. The control system compares the current pressure value with the set target pressure value and calculates the deviation between the two. This deviation will be used for subsequent PID control calculations. The control system uses a PID algorithm composed of three parameters: proportional (P), integral (I) and differential (D) to process the calculated pressure deviation. Through the PID algorithm, the control system calculates the control quantity that needs to be adjusted, that is, the opening size of the solenoid valve or the length of the switching time. This control amount will determine how to adjust the flow of compressed air entering the capsule 5. The control system sends a corresponding control signal to the solenoid valve according to the calculated control amount.

[0038] The solenoid valve adjusts its opening or switching time according to the control signal received, thereby changing the flow of compressed air entering the capsule 5. The control system continuously repeats the above steps, monitors the pressure changes of the capsule 5 in real time, and adjusts the control amount of the solenoid valve according to the PID algorithm until the pressure inside the capsule 5 stabilizes near the set target value. The control system also monitors the time of the pressing process or the time of pressure stabilization. Once the preset pressing time is reached or the pressure has been stable for a predetermined time, the control system will send a signal to close the solenoid valve, thereby ending the process of inflating the capsule 5. After completing the above steps, the entire pressing process of the tire silent cotton is also ended. At this time, the pressed tire silent cotton can be taken out for subsequent production processes.

[0039] In the embodiment of the present invention, a sensor for real-time monitoring of the internal pressure of the capsule is installed on the capsule 5, including:

[0040] Define a genetic encoding method to represent the sensor location, and randomly generate an initial population containing multiple individuals, i.e., multiple sensor layout schemes;

[0041] For each individual, its fitness is calculated through the fitness function;

[0042] According to the result of the fitness function, select individuals with corresponding fitness in the population to enter the next generation;

[0043] Two parent individuals are randomly selected, and new offspring individuals are generated through single-point crossover. The genes of the offspring individuals are randomly mutated with a certain probability until the termination condition is met. The corresponding individuals finally obtained are decoded into the actual sensor installation position, and the pressure sensor is installed on the capsule according to the sensor installation position.

[0044] In an embodiment of the present invention, through the adaptive search capability of the genetic algorithm, the optimal or approximately optimal sensor installation position can be found in many possible layout schemes. This ensures that the sensor can more accurately monitor the pressure changes inside the capsule and improve the accuracy and reliability of data acquisition. The optimized sensor layout reduces the number of unnecessary sensors while ensuring pressure monitoring at key positions. This helps to reduce system complexity and maintenance costs and improve overall operating efficiency. Through the crossover and mutation operations in the genetic algorithm, the generated sensor layout scheme has better robustness. This means that in the face of actual situations such as changes in capsule shape and uneven pressure distribution, the sensor system can still maintain a high monitoring performance. The genetic encoding method and fitness function defined by the method can be adjusted according to specific needs. Therefore, it can not only be applied to the current problem, but also can be easily extended to other similar problems, such as pressure monitoring of capsules of different shapes or sizes. The entire optimization process is automatically completed by the algorithm without human intervention. This greatly reduces labor costs and improves the objectivity and accuracy of the decision-making process. At the same time, with the accumulation of data and the continuous learning of the algorithm, the performance of the system is expected to be further improved. Accurate pressure monitoring is the key to ensuring safe production in the tire manufacturing process. By optimizing the sensor layout, the method helps to promptly discover potential safety hazards, so as to take measures to prevent accidents.

[0045] In the embodiment of the present invention, the calculation formula of the fitness function is:

[0046]

[0047] Among them, F(x) is the fitness value of individual x; α is a weight coefficient; M represents the number of sensors selected in individual x, that is, the number of 1s in the binary code; and They represent the true pressure value and sensor reading at the i-th sensor position, respectively; β is a weight coefficient; C(x) represents the number of sensors installed in individual x, that is, the number of 1s in the binary code; γ is a weight coefficient; d ij represents the distance between the i-th and j-th sensor positions; is the total number of sensor position pairs used to calculate the average of the distances between all sensors.

[0048] In an embodiment of the present invention, the fitness function takes into account the accuracy of the sensor readings (measured by the sum of the absolute values ​​of the difference between the true pressure value and the sensor readings), the number of sensors (cost-related), and the spatial distribution between sensors (measured by the distance between sensors). This multi-objective balance ensures that the optimization process does not only focus on a single indicator, but takes into account multiple key factors. By adjusting the weight coefficient, the importance of different objectives in the optimization process can be flexibly changed. This enables the fitness function to be customized according to different application scenarios and requirements, improving the versatility and practicality of the algorithm. The fitness function contains the reciprocal of the sum of the absolute values ​​of the difference between the true pressure value and the sensor reading, which means that when the sensor reading is closer to the true value, the individual fitness will be higher. This helps the algorithm to prefer those sensor layout solutions that can provide more accurate readings during the search process. By considering the number of sensors as a cost factor and penalizing them in the fitness function, the algorithm can reduce the number of sensors used as much as possible while ensuring a certain monitoring accuracy, thereby reducing costs. The average value of the distance between sensors is introduced in the fitness function, which helps the algorithm consider the spatial distribution between sensors during the optimization process. By increasing the distance between sensors, redundancy can be reduced and coverage of the monitoring range can be improved, thereby enhancing the robustness and reliability of the entire system.

[0049] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make various modifications and improvements without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.

Claims

1. A sponge pressing device, comprising a servo electric cylinder (1), a fixing seat (2), an inflatable seat (3), an upper chuck (4), a capsule (5), and a lower chuck (6), characterized in that: The servo electric cylinder (1) is fixedly connected to the fixing seat (2) by screws, the inflation seat (3) is fixedly connected to the fixing seat (2) by screws, the upper chuck (4) is fixedly connected to the inflation seat (3) by self-made threads, the lower chuck (6) is fixedly connected to the servo electric cylinder extension rod (1) by screws, and the capsule is fixedly connected to the upper chuck (4) and the lower chuck (6) by a slot; the servo electric cylinder (1) drives the lower chuck (6) to move vertically up and down, and the servo electric cylinder stroke can be set according to the tire height to adapt to different tire heights.

2. The sponge pressing device according to claim 1, characterized in that: The inflation seat (3) is fed with compressed air to expand the capsule (5) radially, thereby pushing the sponge into the inner wall of the tire to achieve a sponge pressing effect.

3. A control method for a tire silent cotton conveying device according to any one of claims 1 to 2, characterized in that: The method comprises the following: A sensor for real-time monitoring of the internal pressure of the capsule is installed on the capsule (5); According to the tire specifications and the sponge pressing requirements, the target pressure value that the bladder (5) needs to reach is set; Reading the current pressure value of the capsule (5) in real time through a pressure sensor, and calculating the deviation between the current pressure value and the set point; Based on the deviation, the PID algorithm is used to calculate the control quantity, that is, the opening degree or switching time of the solenoid valve; According to the control quantity calculated by PID, the flow rate of compressed air entering the capsule (5) is adjusted through the electromagnetic valve, and the process is repeated continuously until the pressure of the capsule (5) is stabilized near the set point and the pressing requirement is met; when the preset pressing time or pressure stabilization time is reached, the electromagnetic valve is closed to end the inflation process.

4. The control method of the tire silent cotton conveying device according to claim 3 is characterized in that: A sensor for real-time monitoring of the internal pressure of the capsule is installed on the capsule (5), comprising: Define a genetic encoding method to represent the sensor location, and randomly generate an initial population containing multiple individuals, i.e., multiple sensor layout schemes; For each individual, its fitness is calculated through the fitness function; According to the result of the fitness function, select individuals with corresponding fitness in the population to enter the next generation; Two parent individuals are randomly selected, and new offspring individuals are generated through single-point crossover. The genes of the offspring individuals are randomly mutated with a certain probability until the termination condition is met. The corresponding individuals finally obtained are decoded into the actual sensor installation position, and the pressure sensor is installed on the capsule according to the sensor installation position.

5. The control method of the tire silent cotton conveying device according to claim 4, characterized in that: The calculation formula of the fitness function is: Among them, F(x) is the fitness value of individual x; α is a weight coefficient; M represents the number of sensors selected in individual x, that is, the number of 1s in the binary code; and They represent the true pressure value and sensor reading at the i-th sensor position, respectively; β is a weight coefficient; C(x) represents the number of sensors installed in individual x, that is, the number of 1s in the binary code; γ is a weight coefficient; d ij represents the distance between the i-th and j-th sensor positions; is the total number of sensor position pairs used to calculate the average of the distances between all sensors.

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