A hydraulic servo control system for the flexible mold of a tire vulcanizer

Abstract

The present invention relates to the field of hydraulic control technology, and provides a tire vulcanizer active mold hydraulic servo control system, comprising: obtaining monitoring data of the active mold hydraulic system during tire vulcanization, and then obtaining the response error of the servo control system and the error authenticity factor of the active mold hydraulic system according to the monitoring data, and then calculating the parameter adjustment factor of the servo control system according to the response error of the servo control system and the error authenticity factor of the active mold hydraulic system, and finally adjusting the servo control system according to the parameter adjustment factor to realize the control of the active mold hydraulic system. In this way, the working efficiency of the tire vulcanizer and the control stability and accuracy of the active mold hydraulic servo control system can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic control, in particular to a hydraulic servo control system for an active die of a tire vulcanizer. Background Art

[0002] The hydraulic servo control system of the flexible mold in the tire vulcanizer is used to control the movement and pressure of the flexible mold during the vulcanization process to ensure that the tire can be vulcanized evenly under high temperature and high pressure. And the flexible mold clamps or clamps the tire so that it can be stably placed in the vulcanization area of ​​the vulcanizer to prevent the tire from moving or deforming during the vulcanization process.

[0003] In the hydraulic servo control system, the design of the flexible mold can coordinate with the hydraulic and servo mechanisms of the control system to achieve precise motion control and pressure regulation, ensuring stability and consistency during the tire vulcanization process. However, in the hydraulic servo control system of the flexible mold of the tire vulcanizer, due to leakage, valve failure, oil pollution and other problems in the hydraulic system, the pressure applied by the flexible mold to the tire surface is unstable or cannot be accurately controlled; during the vulcanization process, it is very critical to quickly adjust the position and pressure of the flexible mold. If the fluid resistance in the hydraulic system increases, the oil viscosity changes, or the servo valve hardens poorly, the system response speed may slow down. Due to the poor response speed of the control system, it will affect the working efficiency of the tire vulcanizer and the control stability and accuracy of the hydraulic servo control system of the flexible mold. Summary of the invention

[0004] In view of the above problems, the present application provides a hydraulic servo control system for an active mold of a tire vulcanizer, which can improve the working efficiency of the tire vulcanizer and the control stability and accuracy of the hydraulic servo control system for the active mold.

[0005] In a first aspect, an embodiment of the present application provides a tire vulcanizer flexible mold hydraulic servo control system, including: a servo control system and a flexible mold hydraulic system, the servo control system executes the following method to realize the control of the flexible mold hydraulic system, including:

[0006] Obtain monitoring data of the hydraulic system of the flexible mold during tire vulcanization;

[0007] According to the monitoring data, the response error of the servo control system and the error authenticity factor of the active mold hydraulic system are obtained;

[0008] According to the response error of the servo control system and the error authenticity factor of the active mold hydraulic system, the parameter adjustment factor of the servo control system is calculated;

[0009] The servo control system is adjusted according to the parameter adjustment factor to achieve control of the active mold hydraulic system.

[0010] In a possible implementation, obtaining a response error of a servo control system according to monitoring data includes:

[0011] Obtain the pressure data of each pressure sensor in the hydraulic cylinder of the flexible mold during tire vulcanization;

[0012] According to the pressure data of each pressure sensor, the pressure distribution dispersion corresponding to each pressure sensor in the hydraulic cylinder of the active mold is calculated;

[0013] According to the pressure distribution dispersion corresponding to each pressure sensor in the hydraulic cylinder of the flexible mold, the pressure distribution dispersion index in the hydraulic cylinder of the flexible mold is calculated;

[0014] According to the discrete index of pressure distribution in the hydraulic cylinder of the flexible mold, the response error of the servo control system is calculated.

[0015] In a possible implementation, it further includes: the calculation formula of the pressure distribution discreteness corresponding to each pressure sensor in the hydraulic cylinder of the flexible mold is:

[0016]

[0017] in, Indicates the first The dispersion of the pressure distribution monitored by each sensor; , They represent the first The pressure monitoring values ​​at the jth and jth time positions; Represents the total number of difference groups of pressure monitoring values ​​at any two moments; Indicates The absolute value of the difference between the group pressure monitoring values.

[0018] In a possible implementation, the method further includes: a calculation formula for a discrete index of pressure distribution in a hydraulic cylinder of an active mold is:

[0019]

[0020] in, Indicates the discrete index of pressure distribution in the hydraulic cylinder of the flexible mold; , They represent the discreteness of the pressure distribution monitored by the t-th and y-th sensors in the hydraulic cylinder of the flexible mold respectively; Indicates the total number of difference groups of pressure distribution discreteness corresponding to the pressure sensor monitoring data at any two positions; Indicates The absolute value of the difference in the dispersion of the group pressure distribution.

[0021] In a possible implementation, the method further includes: a calculation formula for the response error of the servo control system is:

[0022]

[0023] in, Represents the system response error in the servo control system; It represents the discrete index of pressure distribution in the hydraulic cylinder of the flexible mold; G represents the number of pressure sensors at different positions that reach the expected set value during the regulation process. is a non-zero constant, =0.01.

[0024] In a possible implementation, the error authenticity factor of the active mold hydraulic system is obtained according to the monitoring data, including:

[0025] Obtain fluid temperature data, hydraulic oil contaminants and water content monitoring data in the hydraulic system of the flexible mold during tire vulcanization;

[0026] According to the fluid temperature data, calculate the deviation of fluid temperature change in the active mold hydraulic system;

[0027] Calculate the abnormal coefficient of hydraulic oil in the hydraulic system of the flexible mold based on the monitoring data of the pollutants and water content of the hydraulic oil;

[0028] The error authenticity factor of the active mold hydraulic system is calculated based on the fluid temperature variation deviation and the abnormal coefficient of the hydraulic oil.

[0029] In a possible implementation, the method further includes: a calculation formula for the deviation of the fluid temperature change in the hydraulic system of the flexible mold is:

[0030]

[0031] in, Indicates the deviation of fluid temperature change in the active mold hydraulic system; Indicates the temperature monitoring value at the i-th time position during the temperature monitoring process of the hydraulic oil; It indicates the temperature threshold of the hydraulic system during tire vulcanization, which is 150°C. N indicates the total time points or total number of temperature monitoring values ​​during the monitoring process. It represents the fluctuation variance of the temperature monitoring curve during the monitoring process.

[0032] In a possible implementation, the method further includes: the calculation formula of the abnormal coefficient of the hydraulic oil in the hydraulic system of the flexible mold is:

[0033]

[0034] in, Indicates the abnormal coefficient of hydraulic oil in the hydraulic system of the flexible mold; It represents the water content in the hydraulic oil at the i-th time position during the data monitoring period; N represents the total number of time points during the monitoring process; Indicates the amount of contaminants in the hydraulic oil.

[0035] In a possible implementation, the method further includes: the calculation formula of the error authenticity factor of the active mold hydraulic system is:

[0036]

[0037] in, Represents the error authenticity factor of the active mold hydraulic system; Indicates the deviation of fluid temperature change in the active mold hydraulic system; Indicates the abnormal coefficient of hydraulic oil in the hydraulic system of the flexible mold; represents the hyperbolic tangent function.

[0038] In a possible implementation, the method further includes: a calculation formula of a parameter adjustment factor of a servo control system is:

[0039]

[0040] in, Represents the parameter adjustment factor of the active mode servo control system; Indicates the system response error in the hydraulic servo control system of the flexible mold; Represents the error authenticity factor of the active mold hydraulic system; Indicates the hydraulic oil internal pressure monitoring curve within the monitoring period The average pressure monitoring curve of the hydraulic cylinder The mean square error, represents the hyperbolic tangent function; Represents a natural constant.

[0041] The beneficial effect of the present application is that the present application can effectively obtain the response situation in the system according to the changes in the monitoring data during the control process. First, the external pressure situation in the active mold hydraulic system during the monitoring time period is obtained, that is, the uniformity of the pressure distribution inside the hydraulic cylinder and the speed at which the pressure monitoring values ​​at different positions reach the expected speed to obtain the response error in the servo control system. Then, by monitoring the inside of the hydraulic system, that is, the temperature change bias of the hydraulic oil and the internal loss of the hydraulic oil, the authenticity factor of the system response error is obtained, and finally the parameter adjustment factor of the servo control system is obtained according to the change difference of the internal and external pressure monitoring data. By effectively evaluating the response speed in the system for adjustment and optimization, it is ensured that the system can achieve efficient, stable and precise operation, thereby ensuring the smooth progress of the production process and the guarantee of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of a tire vulcanizer provided in an embodiment of the present application;

[0043] Figure 2 It is a schematic diagram of the system architecture of a hydraulic servo control system for a tire vulcanizer flexible mold provided in an embodiment of the present application;

[0044] Figure 3 It is a flowchart of the steps of a control method for a hydraulic servo control system applied to a tire vulcanizer active mold provided by an embodiment of the present application;

[0045] Figure 4 It is a schematic diagram of a pressure monitoring curve of a flexible mold hydraulic cylinder provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0047] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0048] It should be noted that the modifications of "one" and "plurality" mentioned in the present application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0049] See the schematic diagram of the tire vulcanizer for Figure 1As shown, in the hydraulic servo control system of the active mold of the tire vulcanizer, the tire needs to be placed in the appropriate position of the active mold first. The hydraulic servo system controls the hydraulic cylinder or servo mechanism of the active mold to close the active mold to ensure full contact with the tire surface; the hydraulic servo system controls the active mold to apply appropriate pressure to the tire surface according to the preset pressure parameters; at the same time or after the pressure is applied, the heating system starts to heat the active mold; after the vulcanization is completed, the cooling system starts to cool the active mold and the tire so as to quickly cool the tire from the vulcanization temperature to the safe handling temperature. Finally, after the vulcanization and cooling are completed, the hydraulic system controls the active mold to open, and the tire is taken out of the active mold to complete the entire vulcanization process. The parameters of the hydraulic system of the active mold can be adjusted through the built-in PID controller in the servo control system.

[0050] The embodiments of the present application are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0051] See also Figure 2-3 As shown, the embodiment of the present application discloses a tire vulcanizer active mold hydraulic servo control system, including: a servo control system 11, an active mold hydraulic system 12 and a detection system (sensor) 13. The servo control system 11 controls the active mold hydraulic system 12, and the detection system (sensor) 13 monitors the pressure, temperature and other data of the active mold hydraulic system 12 and sends them to the servo control system 11 for processing. During the tire vulcanization process, the servo control system 11 executes the following method to realize the control of the active mold hydraulic system, including:

[0052] Step S11, obtaining monitoring data of the hydraulic system of the flexible mold during the tire vulcanization process;

[0053] Step S12, obtaining the response error of the servo control system and the error authenticity factor of the active mold hydraulic system according to the monitoring data;

[0054] Step S13, calculating a parameter adjustment factor of the servo control system according to a response error of the servo control system and an error authenticity factor of the active mold hydraulic system;

[0055] Step S14, adjusting the servo control system according to the parameter adjustment factor to achieve control of the active mold hydraulic system.

[0056] Among them, the detection system (sensor) 13 obtains the monitoring data of the hydraulic servo control system. Specifically, necessary sensors must be installed in the flexible mold and its control system. These sensors may include pressure sensors, temperature sensors, displacement sensors, etc., which are used to monitor and record the status and environmental conditions of the flexible mold in real time; the system will use a data acquisition device or interface device to convert the signal obtained by the sensor into an electronic signal and transmit it to the servo control system or data acquisition unit; after receiving the data from the sensor, the servo control system will perform real-time data processing and analysis; the processed data can be displayed in a graphical form through a human-machine interface (HMI) or other monitoring equipment. The operator can understand the various key parameters of the vulcanization process in real time through the monitoring screen.

[0057] In the above-mentioned embodiment steps, the monitoring data of the active mold hydraulic system during the tire vulcanization process is first obtained through the detection system (sensor) 13, and then the response error of the servo control system and the error authenticity factor of the active mold hydraulic system are obtained according to the monitoring data, and then the parameter adjustment factor of the servo control system is calculated according to the response error of the servo control system and the error authenticity factor of the active mold hydraulic system, and finally the servo control system 11 is adjusted according to the parameter adjustment factor to achieve control of the active mold hydraulic system 12. The present application can effectively evaluate the response speed in the system for adjustment and optimization, and ensure that the system can achieve efficient, stable and precise operation, thereby ensuring the smooth progress of the production process and the guarantee of product quality.

[0058] In the hydraulic servo control system of the active mold of the tire vulcanizer, the feedback control strategy is used to adjust the parameters of the active mold by using the changes in the vulcanization process parameters obtained by the sensor. In this process, due to the untimely response of the control system, the active mold may not be able to apply pressure or adjust the position as accurately as expected, thereby affecting the stability of the tire vulcanization process and the tire quality.

[0059] In the feedback control process, it is one-sided to obtain the system response speed only based on the pressure applied by the active mold on the tire surface. Because during the tire vulcanization process, the internal temperature of the hydraulic system, the loss of internal pressure and system safety and other issues may cause the pressure to exceed the safe range, thereby affecting the accuracy of the feedback result based only on the change in the applied pressure, and will also increase the error of the active mold servo hydraulic control system.

[0060] In an optional embodiment of the present application, obtaining a response error of the servo control system according to monitoring data includes:

[0061] Obtain the pressure data of each pressure sensor in the hydraulic cylinder of the flexible mold during tire vulcanization;

[0062] According to the pressure data of each pressure sensor, the pressure distribution dispersion corresponding to each pressure sensor in the hydraulic cylinder of the active mold is calculated;

[0063] According to the pressure distribution dispersion corresponding to each pressure sensor in the hydraulic cylinder of the flexible mold, the pressure distribution dispersion index in the hydraulic cylinder of the flexible mold is calculated;

[0064] According to the discrete index of pressure distribution in the hydraulic cylinder of the flexible mold, the response error of the servo control system is calculated.

[0065] It should be noted that in the hydraulic servo control system of the tire vulcanizer's flexible mold, multiple sensors will be installed in the hydraulic cylinder of the flexible mold to measure the pressure distribution of the flexible mold at different positions, helping to ensure that the pressure on the entire flexible mold surface is evenly distributed or detect uneven conditions.

[0066] During the tire vulcanization process, the hydraulic servo control system of the tire vulcanizer's active mold requires that the pressure on the active mold surface be maintained in a relatively stable state in order to ensure that the vulcanization effect can reach the best state.

[0067] Further, the calculation formula of the pressure distribution discreteness corresponding to each pressure sensor in the hydraulic cylinder of the flexible mold is:

[0068]

[0069] in, Indicates the first The dispersion of the pressure distribution monitored by each sensor; , They represent the first The pressure monitoring values ​​at the jth and jth time positions; Indicates the total number of difference groups of pressure monitoring values ​​at any two moments. There is a group of difference between the monitoring values ​​at any two moments, and there are n groups of difference in total; Indicates The absolute value of the difference between the group pressure monitoring values.

[0070] It should be noted that the pressure monitoring data during the tire vulcanization process is obtained based on a single sensor installed in the hydraulic cylinder of the flexible mold. It represents the average value of the difference between the monitoring values ​​at any two time positions in the monitoring data of a single pressure sensor during the monitoring period. The larger the average value, the greater the distribution dispersion of the pressure monitoring data during the monitoring period, that is, the greater the instability of the pressure data during the monitoring period.

[0071] In an optional embodiment of the present application, it further includes: the calculation formula of the pressure distribution discrete index in the hydraulic cylinder of the flexible mold is:

[0072]

[0073] in, Indicates the discrete index of pressure distribution in the hydraulic cylinder of the flexible mold; , They represent the discreteness of the pressure distribution monitored by the t-th and y-th sensors in the hydraulic cylinder of the flexible mold respectively; Indicates the total number of difference values ​​of the pressure distribution dispersion corresponding to the pressure sensor monitoring data at any two positions. There is a group of pressure distribution dispersion difference values ​​between the pressure sensor monitoring data at any two positions, and there are m groups of difference values ​​in total; Indicates The absolute value of the difference in the dispersion of the group pressure distribution.

[0074] It should be noted that during the tire vulcanization process, since the function of the hydraulic cylinder is to provide a high-pressure environment during the tire vulcanization process, in order to ensure the high efficiency of tire vulcanization, it is necessary to ensure that the pressure distribution in the hydraulic cylinder is uniform. If there is an uneven pressure in the hydraulic cylinder, the servo control system needs to have a higher response speed for regulation. In the above embodiment steps, It represents the average value of the pressure distribution dispersion difference of the pressure sensors at all positions in the hydraulic cylinder of the active mold. The larger the average value, the more inconsistent the distribution of the pressure sensor monitoring data at different positions is, which deviates from the expectation of uniform pressure distribution in the hydraulic system. The larger the value, the more uneven the pressure distribution in the hydraulic cylinder of the flexible mold. The discrete index of the pressure distribution in the hydraulic cylinder of the flexible mold mainly provides data support for the subsequent calculation of the response error in the servo control system.

[0075] In an optional embodiment of the present application, it further includes: the calculation formula of the response error of the servo control system is:

[0076]

[0077] in, Represents the system response error in the servo control system; It represents the discrete index of pressure distribution in the hydraulic cylinder of the flexible mold; G represents the number of pressure sensors at different positions that reach the expected set value during the regulation process (in the regulation process, if the monitoring data of the pressure sensor at one position reaches the expected value, the number is recorded as 1). is a non-zero constant, =0.01, mainly to prevent the denominator from being 0.

[0078] It should be noted that the main purpose of the flexible mold hydraulic servo control system is to provide a better vulcanization environment for the tire during the vulcanization process. During this process, the pressure in the hydraulic cylinder needs to be kept stable and reach the expected state to ensure the expected high-pressure environment during the tire vulcanization process. During the tire vulcanization process, the servo control system usually sets an expected pressure value for the flexible mold hydraulic cylinder, and expects the pressure at all positions of the pressure cylinder to reach the expected value. The expected pressure value can be set to 0.3MPa; the average pressure data of all pressure sensors in the hydraulic cylinder during the monitoring time period is obtained, and the number of positions where the pressure data reaches the expected value is counted, recorded as G;

[0079] In the above-mentioned embodiment steps, It represents the system response error in the hydraulic servo control system of the active mold. The larger the product is, the worse the discrete index of the pressure distribution in the hydraulic cylinder is during the control process of the servo control system, and the fewer the number of sensors that reach the expected pressure during the regulation process is, which means that there are still multiple positions where the pressure does not reach the expected value during the regulation process; the response error in the control process is large, which means that the responsiveness of the servo control system is poor and cannot meet the environmental conditions for efficient vulcanization at all positions.

[0080] It should be further explained that obtaining the response error based on the pressure distribution in the hydraulic cylinder may have certain deficiencies and cannot truly reflect the response of the control system. The response error of the control system should be effectively verified from the internal conditions of the tire vulcanizer active mold hydraulic system.

[0081] It should also be noted that in the tire vulcanizer active mold hydraulic servo control system, the parameters of the active mold hydraulic system are adjusted according to the actual detection feedback. However, in this process, evaluating the response error of the control system based on pressure and control times is not accurate enough, and the authenticity of the pressure anomaly needs to be verified based on the changes in the monitoring data.

[0082] In an optional embodiment of the present application, the error authenticity factor of the active mold hydraulic system is obtained according to the monitoring data, including:

[0083] Obtain fluid temperature data, hydraulic oil contaminants and water content monitoring data in the hydraulic system of the flexible mold during tire vulcanization;

[0084] According to the fluid temperature data, calculate the deviation of fluid temperature change in the active mold hydraulic system;

[0085] Calculate the abnormal coefficient of hydraulic oil in the hydraulic system of the flexible mold based on the monitoring data of the pollutants and water content of the hydraulic oil;

[0086] The error authenticity factor of the active mold hydraulic system is calculated based on the fluid temperature variation deviation and the abnormal coefficient of the hydraulic oil.

[0087] Further, the calculation formula of the temperature change deviation of the fluid in the hydraulic system of the active mold is:

[0088]

[0089] in, Indicates the deviation of fluid temperature change in the active mold hydraulic system; Indicates the temperature monitoring value at the i-th time position during the temperature monitoring process of the hydraulic oil; It indicates the temperature threshold of the hydraulic system during tire vulcanization, which is 150°C. N indicates the total time points or total number of temperature monitoring values ​​during the monitoring process, and there are N time points in the monitoring process. It represents the fluctuation variance of the temperature monitoring curve during the monitoring process.

[0090] It should be noted that in the active mold hydraulic servo control system, the temperature change of the fluid can affect the pressure characteristics of the hydraulic system, especially when the liquid temperature is too high or too low, it will affect the performance of the hydraulic oil, and then cause the pressure change in the hydraulic cylinder to exceed the expected pressure performance.

[0091] In this application, a temperature sensor is installed in the hydraulic system of the flexible mold. The sensor can be installed in the oil tank, pump or return oil pipeline to monitor the temperature change of the hydraulic oil in real time. The temperature threshold is usually set in the hydraulic servo control system of the flexible mold. Once the temperature exceeds the set range, the system will issue an alarm or adopt a predetermined control strategy. The temperature threshold is recorded as , the value is 150℃;

[0092] In the above-mentioned embodiment steps, It represents the average difference between the temperature monitoring value and the threshold temperature at each time position during the temperature monitoring process of the hydraulic oil. The smaller the average difference is, the closer the temperature of the hydraulic oil is to the threshold temperature during the monitoring process, that is, it is hovering on the edge of the warning temperature. It indicates the degree of deviation of the hydraulic oil temperature change during the monitoring process. The larger the product, the higher the degree of deviation of the temperature change. The change in temperature will cause the viscosity of the liquid to change. For example, high temperature may cause dilution of the hydraulic oil and reduce its lubrication performance. Overheating of the hydraulic oil will lead to reduced system performance and accelerated aging of seals, which will affect the pressure output of the hydraulic cylinder.

[0093] It should be further explained that in the hydraulic system of the tire vulcanizer, if the hydraulic oil is mixed with pollutants or water, it may affect the working stability of the hydraulic system. Pollutants or water may cause the valves, cylinders and other components of the hydraulic system to be blocked or corroded, thereby affecting the generation and transmission of pressure, causing the pressure monitoring data to fluctuate or exceed the normal range.

[0094] In an optional embodiment of the present application, it further includes: the calculation formula of the abnormal coefficient of the hydraulic oil in the hydraulic system of the active mold is:

[0095]

[0096] in, Indicates the abnormal coefficient of hydraulic oil in the hydraulic system of the flexible mold; It represents the water content in the hydraulic oil at the i-th time position during the data monitoring period; N represents the total number of time points during the monitoring process; Indicates the amount of contaminants in the hydraulic oil.

[0097] In the above-mentioned embodiment steps, an online oil quality sensor or system is installed in the active mold liquid system, and these systems can monitor the state of the hydraulic oil in real time, including the contaminants and water content. According to the percentage of water in the hydraulic oil monitored by the online oil quality sensor or system, the water content is recorded as q; the content of contaminants is usually present in the hydraulic oil in the form of particles, and the number of contaminants in the hydraulic oil is counted as f.

[0098] It should be noted that It represents the abnormal coefficient of the hydraulic oil in the active mold hydraulic system. The larger the product is, the lower the quality of the hydraulic oil in the hydraulic system is. Pollutants or moisture may cause blockage or corrosion of valves, cylinders and other components of the hydraulic system, thereby affecting the generation and transmission of pressure, causing the pressure monitoring data to fluctuate or exceed the normal range; that is, the lower the abnormal coefficient of the hydraulic oil in the active mold hydraulic servo control system.

[0099] It should be further explained that the change in hydraulic oil temperature and the quality of hydraulic oil reflect the internal loss of the hydraulic system. The greater the internal loss, the external manifestation is the uneven distribution of pressure in the hydraulic cylinder, which cannot provide a good vulcanization environment for the vulcanization efficiency of the tire. In other words, it is verified from the side that the response error of the control system may have a certain degree of unreality.

[0100] In an optional embodiment of the present application, it further includes: the calculation formula of the error authenticity factor of the active mold hydraulic system is:

[0101]

[0102] in, Represents the error authenticity factor of the active mold hydraulic system; Indicates the deviation of fluid temperature change in the active mold hydraulic system; Indicates the abnormal coefficient of hydraulic oil in the hydraulic system of the flexible mold; represents the hyperbolic tangent function.

[0103] It should be noted that in the hydraulic servo control system of the tire vulcanizer's flexible mold, the pressure in the hydraulic cylinder of the flexible mold is affected by many factors. The pressure may be uneven and unstable due to the response speed of the control system; it may also be due to internal factors causing the pressure to exceed the normal range.

[0104] Furthermore, in the above-mentioned embodiment steps, It represents the error authenticity factor of the active mold hydraulic system. The larger the product is, the higher the authenticity of the pressure deviation in the active mold hydraulic servo control system, and the authenticity of the pressure deviation caused by the system response speed is relatively low; that is, the response speed of the control system should be in a normal state, and the internal situation of the hydraulic system needs to be adjusted and optimized.

[0105] In an optional embodiment of the present application, it further includes: the calculation formula of the parameter adjustment factor of the servo control system is:

[0106]

[0107] in, Represents the parameter adjustment factor of the active mode servo control system; Indicates the system response error in the hydraulic servo control system of the flexible mold; Represents the error authenticity factor of the active mold hydraulic system; Indicates the hydraulic oil internal pressure monitoring curve within the monitoring period The average pressure monitoring curve of the hydraulic cylinder The mean square error, represents the hyperbolic tangent function; Represents a natural constant.

[0108] It should be noted that the hydraulic servo control system of the tire vulcanizer's flexible mold can control the movement trajectory, speed and pressure of the flexible mold through precise hydraulic and servo control technology, ensuring that every part of the tire during the vulcanization process can achieve the vulcanization effect required by the design.

[0109] The online oil quality sensor or system can obtain the pressure monitoring curve inside the hydraulic system during the monitoring period, which is recorded as v; and the monitoring curves of all the pressure sensors in the active mold hydraulic cylinder are averaged to obtain a pressure monitoring curve of the active mold hydraulic cylinder, which is recorded as z. For details, see the attached Figure 4 shown.

[0110] In the above-mentioned embodiment steps, It represents the product of the error authenticity factor of the active mold hydraulic system and the difference between the internal and external pressure monitoring results of the hydraulic system. The larger the product is, the stronger the error authenticity inside the hydraulic oil is, and the difference between the internal and external pressure monitoring results is large, which means that the uneven pressure distribution in the hydraulic cylinder is indeed caused by internal errors, that is, there may be certain problems with the hydraulic system; this is used to adjust the response error in the hydraulic servo control system, that is, it is applied as a penalty item. It represents the parameter adjustment factor of the active mold servo control system. The larger the product is, the larger the response error in the active mold servo control system is, which means that the system response speed in the control process is slower, that is, the control system needs to respond faster to cope with the pressure changes in the tire vulcanization process.

[0111] In an optional embodiment of the present application, the servo control system is adjusted according to the parameter adjustment factor to achieve control of the active mold hydraulic system, including: using the adjustment coefficient 1+ The proportional coefficient Kp in the current servo control system is adjusted and controlled.

[0112] Specifically, the hydraulic servo system is usually used for PID closed-loop control in the hydraulic servo control system of the tire vulcanizer. According to the parameter adjustment factor of the active mold servo control system calculated above, the adjustment coefficient 1+ The product of the proportional coefficient Kp in the current controller is used as a new control parameter. The response speed of the servo control system is improved by adjusting the control parameters of the control system. The movement speed of the hydraulic cylinder is adjusted to ensure the smooth movement and reaction speed of the active mold, thereby achieving the expected tire vulcanization environment more stably.

[0113] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0114] The above is a detailed introduction to a hydraulic servo control system for an active mold of a tire vulcanizer provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A tire vulcanizing machine flexible mold hydraulic servo control system, comprising: The servo control system and the movable mold hydraulic system are characterized in that the servo control system executes the following method to realize the control of the movable mold hydraulic system, and the method includes: Obtain monitoring data of the hydraulic system of the flexible mold during tire vulcanization; According to the monitoring data, a response error of the servo control system and an error authenticity factor of the active mold hydraulic system are obtained; Calculating a parameter adjustment factor of the servo control system according to a response error of the servo control system and an error authenticity factor of the active die hydraulic system; The servo control system is adjusted according to the parameter adjustment factor to achieve control of the hydraulic system of the flexible mold; Obtaining a response error of the servo control system according to the monitoring data includes: Obtain the pressure data of each pressure sensor in the hydraulic cylinder of the flexible mold during tire vulcanization; Calculate the pressure distribution dispersion corresponding to each pressure sensor in the hydraulic cylinder of the movable mold according to the pressure data of each pressure sensor; Calculating a pressure distribution discrete index in the hydraulic cylinder of the flexible mold according to the pressure distribution discreteness corresponding to each pressure sensor in the hydraulic cylinder of the flexible mold; Calculating the response error of the servo control system according to the discrete index of the pressure distribution in the hydraulic cylinder of the flexible mold; The calculation formula for the pressure distribution discreteness corresponding to each pressure sensor in the active mold hydraulic cylinder is: in, Indicates the first The dispersion of the pressure distribution monitored by each sensor; , They represent the first The pressure monitoring values ​​at the jth and jth time positions; Represents the total number of difference groups of pressure monitoring values ​​at any two moments; Indicates The absolute value of the difference between the group pressure monitoring values; The calculation formula of the discrete index of the pressure distribution in the hydraulic cylinder of the active mold is: in, Indicates the discrete index of pressure distribution in the hydraulic cylinder of the flexible mold; , They represent the discreteness of the pressure distribution monitored by the t-th and y-th sensors in the hydraulic cylinder of the flexible mold respectively; Indicates the total number of difference groups of pressure distribution discreteness corresponding to the pressure sensor monitoring data at any two positions; Indicates The absolute value of the difference in the dispersion of the group pressure distribution; The calculation formula of the response error of the servo control system is: in, Represents the system response error in the servo control system; It represents the discrete index of pressure distribution in the hydraulic cylinder of the flexible mold; G represents the number of pressure sensors at different positions that reach the expected set value during the regulation process. is a non-zero constant, =0.01; According to the monitoring data, the error authenticity factor of the active mold hydraulic system is obtained, including: Obtain fluid temperature data, hydraulic oil contaminants and water content monitoring data in the hydraulic system of the flexible mold during tire vulcanization; Calculating the temperature variation deviation of the fluid in the active mold hydraulic system according to the fluid temperature data; Calculating the abnormal coefficient of the hydraulic oil in the hydraulic system of the active mold according to the monitoring data of the contaminants and water content of the hydraulic oil; Calculating the error authenticity factor of the active mold hydraulic system according to the fluid temperature change deviation and the abnormal coefficient of the hydraulic oil; The calculation formula for the deviation of fluid temperature change in the active mold hydraulic system is: in, Indicates the deviation of fluid temperature change in the active mold hydraulic system; Indicates the temperature monitoring value at the i-th time position during the temperature monitoring process of the hydraulic oil; It indicates the temperature threshold of the hydraulic system during tire vulcanization, which is 150°C. N indicates the total time points or total number of temperature monitoring values ​​during the monitoring process. Indicates the fluctuation variance of the temperature monitoring curve during the monitoring process; The calculation formula of the abnormal coefficient of the hydraulic oil in the active mold hydraulic system is: in, Indicates the abnormal coefficient of hydraulic oil in the hydraulic system of the flexible mold; It represents the water content in the hydraulic oil at the i-th time position during the data monitoring period; N represents the total number of time points during the monitoring process; It indicates the amount of contaminants in the hydraulic oil; The calculation formula of the error authenticity factor of the active mold hydraulic system is: in, Represents the error authenticity factor of the active mold hydraulic system; Indicates the deviation of fluid temperature change in the active mold hydraulic system; Indicates the abnormal coefficient of hydraulic oil in the hydraulic system of the flexible mold; represents the hyperbolic tangent function; The calculation formula of the parameter adjustment factor of the servo control system is: in, Represents the parameter adjustment factor of the active mode servo control system; Indicates the system response error in the hydraulic servo control system of the flexible mold; Represents the error authenticity factor of the active mold hydraulic system; Indicates the hydraulic oil internal pressure monitoring curve within the monitoring period The average pressure monitoring curve of the hydraulic cylinder The mean square error, represents the hyperbolic tangent function; Represents a natural constant.

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