Control method and control system of hydraulic equipment and injection molding machine

Abstract

The invention provides a control method and system of hydraulic equipment and an injection molding machine. The control method comprises the steps that the target piece number, the current hydraulic oil model and the first real-time hydraulic oil temperature are obtained; standard hydraulic data are determined; inputting the first real-time hydraulic oil temperature into a pre-trained hydraulic oil compensation model to obtain a hydraulic parameter compensation value, and determining the sum of the standard hydraulic parameter and the hydraulic parameter compensation value as a target hydraulic parameter; the hydraulic equipment is controlled to work according to the target hydraulic parameters, and 1 is added to the current piece number; acquiring a second real-time hydraulic oil temperature corresponding to the hydraulic equipment; judging whether the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature or not; and if not, repeating the above steps until the current piece number is the same as the target piece number. In the mode, the hydraulic parameters of the hydraulic equipment can be changed in real time according to the temperature of the hydraulic oil, so that the mold opening and closing position deviation caused by oil temperature fluctuation is reduced, and the production efficiency of the injection molding machine and the consistency of the quality of finished products are improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding machine control, and in particular to a control method for hydraulic equipment, a control system and an injection molding machine. Background Art

[0002] In the production process of injection molding machines, the stability of hydraulic equipment is crucial to the opening and closing accuracy of molds and the quality of finished products. However, fluctuations in hydraulic oil temperature will cause changes in viscosity, which in turn affects the pressure and flow of hydraulic equipment, causing deviations in the opening and closing positions of molds. At present, experienced operators are usually relied on to manually adjust pressure and flow parameters according to changes in oil temperature at the production site, but this method not only increases labor costs, but also makes it difficult to ensure the timeliness and accuracy of compensation. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a control method, a control system and an injection molding machine for hydraulic equipment, which can adjust the hydraulic parameters of the hydraulic equipment according to the real-time changes in the hydraulic oil temperature, thereby reducing the opening and closing mold position deviation caused by oil temperature fluctuations, thereby improving the production efficiency of the injection molding machine and the consistency of the finished product quality.

[0004] In a first aspect, an embodiment of the present invention provides a control method for hydraulic equipment, which is applied to a controller of an injection molding machine, and the injection molding machine also includes a hydraulic equipment communicatively connected to the controller; the method includes: S1: obtaining a target number of pieces, a current hydraulic oil model corresponding to the hydraulic equipment, and a first real-time hydraulic oil temperature; S2: determining standard hydraulic data corresponding to the current hydraulic oil model; the standard hydraulic data includes standard hydraulic parameters and standard mold opening and closing end positions; S3: inputting the first real-time hydraulic oil temperature into a pre-trained hydraulic oil compensation model to obtain a hydraulic parameter compensation value, and determining the sum of the standard hydraulic parameter and the hydraulic parameter compensation value as the target hydraulic parameter; S4: controlling the hydraulic equipment to work with the target hydraulic parameter, and adding 1 to the current number of pieces; wherein the initial value of the current number of pieces is 0; S5: obtaining a second real-time hydraulic oil temperature corresponding to the hydraulic equipment; S6: determining whether the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature; S7: if the second real-time hydraulic oil temperature is different from the first real-time hydraulic oil temperature, repeating steps S2-S6 until the current number of pieces is the same as the target number of pieces.

[0005] Furthermore, the hydraulic oil compensation model is trained in the following way: taking the historical hydraulic oil model, standard hydraulic data, historical hydraulic oil temperature, historical hydraulic parameters and historical mold opening and closing end positions of the hydraulic equipment as input and the historical hydraulic parameter compensation value as output, the neural network model is trained until the preset training conditions are met to obtain a trained hydraulic oil compensation model.

[0006] Furthermore, the standard hydraulic data also includes a standard mold opening and closing end position; the standard mold opening and closing end position also includes a standard mold opening end position and a standard mold closing end position; after controlling the hydraulic equipment to work with the target hydraulic parameters and adding 1 to the current number of pieces, the method also includes: obtaining the current mold opening end position and the current mold closing end position of the hydraulic equipment; determining the difference between the current mold opening end position and the standard mold opening end position as the mold opening error, and determining the difference between the current mold closing end position and the standard mold closing end position as the mold closing error; judging whether the mold opening error or the mold closing error is within the corresponding preset position error threshold range; if both the mold opening error and the mold closing error are within the corresponding preset position error threshold range, keeping the target hydraulic parameters unchanged; if the mold opening error or the mold closing error is not within the corresponding preset position error threshold range, updating the target hydraulic parameters based on the preset hydraulic parameter updating method.

[0007] Furthermore, based on the preset hydraulic parameter updating method, the step of updating the target hydraulic parameters includes: adding 1 to the number of errors corresponding to the first real-time hydraulic oil temperature, and judging whether the number of errors is greater than the preset number of errors; wherein the initial value of the number of errors is 0; if the number of errors is greater than the preset number of errors, based on the preset integral compensation method, updating the target hydraulic parameters to obtain updated target hydraulic parameters.

[0008] Furthermore, based on the preset hydraulic parameter updating method, the step of updating the target hydraulic parameter further includes: if the number of errors is less than or equal to the preset number of errors, keeping the target hydraulic parameter unchanged.

[0009] Furthermore, based on the preset integral compensation method, the target hydraulic parameters are updated to obtain the updated target hydraulic parameters, including: calculating the error average of the mold opening error and the mold closing error; the error average is a positive number or a negative number; judging whether the error average is a positive number; if the error average is a positive number, reducing the minimum integral increment on the target hydraulic parameters to obtain the updated target hydraulic parameters; if the error average is a negative number, increasing the minimum integral increment on the target hydraulic parameters to obtain the updated target hydraulic parameters.

[0010] Furthermore, after the step of updating the target hydraulic parameters, the method also includes: generating a valid compensation data set based on the first real-time hydraulic oil temperature and the updated target hydraulic parameters; and incrementally training the hydraulic oil compensation model based on the valid compensation data set to obtain an updated hydraulic oil compensation model.

[0011] Furthermore, after the step of determining whether the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature, the method further includes: if the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature, repeating steps S4-S6 until the current number of pieces is the same as the target number of pieces.

[0012] In a second aspect, an embodiment of the present invention provides a control system for hydraulic equipment, which is applied to a controller of an injection molding machine, and the injection molding machine also includes a hydraulic equipment that is communicatively connected to the controller; the system includes: a data acquisition module for acquiring a current hydraulic oil model and a first real-time hydraulic oil temperature corresponding to the hydraulic equipment; a standard hydraulic data acquisition module for determining standard hydraulic data corresponding to the current hydraulic oil model; the standard hydraulic data includes standard hydraulic parameters and standard mold opening and closing end positions; a target hydraulic parameter determination module for inputting the first real-time hydraulic oil temperature into a pre-trained hydraulic oil compensation model to obtain a hydraulic parameter compensation value, and determining the standard hydraulic parameters and hydraulic The sum of the parameter compensation values ​​is the target hydraulic parameter; the hydraulic equipment control module is used to control the hydraulic equipment to work with the target hydraulic parameter and add 1 to the current number of pieces; wherein the initial value of the current number of pieces is 0; the data acquisition module is also used to obtain the second real-time hydraulic oil temperature corresponding to the hydraulic equipment; the temperature judgment module is used to judge whether the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature; the temperature judgment module is also used to call the standard hydraulic data acquisition module, the target hydraulic parameter determination module, the hydraulic equipment control module and the data acquisition module if the second real-time hydraulic oil temperature is different from the first real-time hydraulic oil temperature, until the current number of pieces is the same as the target number of pieces.

[0013] In the third aspect, an embodiment of the present invention provides an injection molding machine, including an injection molding machine body, and a controller, hydraulic equipment, a displacement sensor and a temperature sensor arranged in the injection molding machine body, and also includes a control system of the above-mentioned hydraulic equipment; the control system of the hydraulic equipment is arranged in the controller; the controller is communicatively connected with the hydraulic equipment; the temperature sensor is used to measure the temperature of the hydraulic oil; the displacement sensor is used to measure the opening and closing position of the mold; the temperature sensor and the displacement sensor are both communicatively connected with the controller.

[0014] The embodiment of the present invention provides a control method, a control system and an injection molding machine for hydraulic equipment, wherein the injection molding machine also includes a hydraulic equipment communicatively connected to a controller; the method includes: S1: obtaining a target number of pieces, a current hydraulic oil model corresponding to the hydraulic equipment and a first real-time hydraulic oil temperature; S2: determining standard hydraulic data corresponding to the current hydraulic oil model; the standard hydraulic data includes standard hydraulic parameters and standard mold opening and closing end positions; S3: inputting the first real-time hydraulic oil temperature into a pre-trained hydraulic oil compensation model to obtain a hydraulic parameter compensation value, and determining the sum of the standard hydraulic parameter and the hydraulic parameter compensation value as the target hydraulic parameter; S4: controlling the hydraulic equipment to work with the target hydraulic parameter, and adding 1 to the current number of pieces; wherein the initial value of the current number of pieces is 0; S5: obtaining a second real-time hydraulic oil temperature corresponding to the hydraulic equipment; S6: determining whether the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature; S7: if the second real-time hydraulic oil temperature is different from the first real-time hydraulic oil temperature, repeating steps S2-S6 until the current number of pieces is the same as the target number of pieces. In this way, the hydraulic parameters of the hydraulic equipment can be changed in real time according to the hydraulic oil temperature, thereby reducing the mold opening and closing position deviation caused by oil temperature fluctuations, thereby improving the production efficiency of the injection molding machine and the consistency of the finished product quality.

[0015] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A flow chart of a control method for a hydraulic device provided in Embodiment 1 of the present invention;

[0019] Figure 2 A flow chart of a method for updating a target hydraulic parameter provided in the first embodiment of the present invention;

[0020] Figure 3 A flow chart of a method for updating target hydraulic parameters based on a preset hydraulic parameter updating method provided in Embodiment 1 of the present invention;

[0021] Figure 4 A flow chart of a method for updating target hydraulic parameters based on a preset integral compensation method provided in Embodiment 1 of the present invention;

[0022] Figure 5 A schematic diagram of a control system of a hydraulic device provided in Embodiment 2 of the present invention;

[0023] Figure 6 This is a schematic diagram of the injection molding machine provided in Example 3 of the present invention.

[0024] Icons: 1-data acquisition module; 2-standard hydraulic data acquisition module; 3-target hydraulic parameter determination module; 4-hydraulic equipment control module; 5-temperature judgment module; 11-injection molding machine body; 12-controller; 13-hydraulic equipment; 121-control system of hydraulic equipment; 131-displacement sensor; 132-temperature sensor. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The viscosity of hydraulic oil refers to the ability of the internal molecules to resist the flow of the liquid when it flows, and is usually expressed as kinematic viscosity. As the temperature of the hydraulic oil increases, its viscosity will gradually decrease. This is because the increase in temperature will intensify the molecular thermal motion of the hydraulic oil and weaken the interaction between the molecules, so the internal friction of the liquid will decrease and the flow resistance generated by the liquid will decrease. The viscosity of hydraulic oil of different types of hydraulic oil is also different. The viscosity of hydraulic oil at different temperatures is shown in Table 1 below.

[0027]

[0028] The viscosity of hydraulic oil changes with the temperature and pressure, which will affect the performance and working efficiency of hydraulic equipment. In low temperature environment, the viscosity of hydraulic oil is high, the working efficiency of hydraulic equipment will be reduced, and even the hydraulic equipment cannot be started. In high temperature environment, the viscosity of hydraulic oil will be reduced, resulting in reduced friction, and problems such as unstable pressure may occur.

[0029] The present application provides a control method for hydraulic equipment, which can adjust the hydraulic parameters of the hydraulic equipment according to the real-time changes in the hydraulic oil temperature, thereby reducing the opening and closing mold position deviation caused by oil temperature fluctuations, thereby improving the production efficiency of the injection molding machine and the consistency of the finished product quality.

[0030] To facilitate understanding of this embodiment, the embodiment of the present invention is described in detail below.

[0031] Embodiment 1:

[0032] Figure 1 This is a flow chart of a control method for hydraulic equipment provided in Embodiment 1 of the present invention.

[0033] The control method of hydraulic equipment is applied to the controller of an injection molding machine, wherein the injection molding machine also includes hydraulic equipment that is communicatively connected to the controller, wherein the injection molding machine also includes a displacement sensor and a temperature sensor arranged in the hydraulic equipment.

[0034] Here, there is at least one temperature sensor, and the temperature sensor is used to measure the hydraulic oil temperature. When the number of temperature sensors exceeds one, the hydraulic oil temperature measured by each temperature sensor is obtained, and the average value is calculated to determine the average value as the real-time hydraulic oil temperature.

[0035] The temperature sensor can be installed directly in the hydraulic oil tank to monitor the temperature of the hydraulic oil. It can also be installed at key locations in the hydraulic oil circuit (such as the oil pump outlet or the oil return port) to monitor the hydraulic oil temperature in the hydraulic equipment in real time.

[0036] The displacement sensor is used to measure the position of mold opening and closing. It can be installed on the piston rod of the hydraulic cylinder to accurately measure the telescopic displacement of the hydraulic cylinder, thereby controlling the position of mold opening and closing. It can also be installed on the guide mechanism or guide column to track the movement of the mold along the guide track during the opening and closing process. It can also be installed on the moving platform of the mold to monitor the displacement state of mold opening and closing by measuring the position of the platform.

[0037] Reference Figure 1 , a control method for a hydraulic device, comprising:

[0038] Step S1: Obtain the target number of pieces, the current hydraulic oil model corresponding to the hydraulic equipment, and the first real-time hydraulic oil temperature.

[0039] Here, the controller of the injection molding machine is connected to the host computer of the peripheral device. The host computer can be a central control computer or server, which controls the working status and production tasks of the injection molding machine through special software. The central control computer is usually used in the injection molding workshop to manage multiple injection molding machines and coordinate their production tasks.

[0040] The controller obtains the production target number of the injection molding task sent by the host computer, obtains the model of the hydraulic oil currently in use, and monitors the hydraulic oil temperature in real time through the temperature sensor.

[0041] Specifically, the production task is set to 100 pieces, the hydraulic oil model is type A hydraulic oil, and the current hydraulic oil temperature is 30°C.

[0042] Step S2: Determine the standard hydraulic data corresponding to the current hydraulic oil model; the standard hydraulic data includes standard hydraulic parameters and standard mold opening and closing end positions.

[0043] Here, the controller pre-stores a hydraulic oil standard database, which stores hydraulic data corresponding to different hydraulic oil models at standard temperatures. Here, the standard temperature can be pre-set according to actual conditions, and can be set to 25°C.

[0044] The hydraulic data includes hydraulic parameters and mold opening and closing end positions. Among them, the standard hydraulic parameters include standard pressure and standard flow. The mold opening and closing end positions include mold opening end position and mold closing end position.

[0045] The standard hydraulic data corresponding to the current hydraulic oil model is used as the reference value to ensure the mold opening and closing accuracy.

[0046] Specifically, it is learned from the query database that the standard hydraulic pressure of type A hydraulic oil at a standard temperature (such as 25° C.) is 140 bar, the standard flow rate is 50%, the standard mold opening end position is 150 mm, and the mold closing end position is 0 mm.

[0047] Step S3: inputting the first real-time hydraulic oil temperature into a pre-trained hydraulic oil compensation model to obtain a hydraulic parameter compensation value, and determining the sum of the standard hydraulic parameter and the hydraulic parameter compensation value as the target hydraulic parameter.

[0048] Here, the first real-time hydraulic oil temperature (such as 30°C) is input into the hydraulic oil compensation model, and the model outputs a hydraulic parameter compensation value for adjusting the pressure and flow of the hydraulic equipment. The compensation value is added to the standard hydraulic parameter to obtain the target hydraulic parameter to cope with the impact of temperature changes.

[0049] Specifically, 30°C is input into the hydraulic oil compensation model, and the compensation values ​​are 2 bar (pressure) and 1% (flow rate). The target hydraulic parameters are therefore 142 bar pressure and 51% flow rate.

[0050] In one embodiment, the hydraulic oil compensation model is trained in the following manner:

[0051] The historical hydraulic oil model, standard hydraulic data, historical hydraulic oil temperature, historical hydraulic parameters and historical mold opening and closing end positions of the hydraulic equipment are used as input, and the historical hydraulic parameter compensation values ​​are used as output. The neural network model is trained until the preset training conditions are met to obtain a trained hydraulic oil compensation model.

[0052] Here, when training the hydraulic oil compensation model, a large amount of historical data is needed, including different hydraulic oil models used by the hydraulic equipment, standard hydraulic parameters and standard mold opening and closing end positions, hydraulic oil temperature in actual operation, and the actual hydraulic parameters of the hydraulic equipment under these conditions.

[0053] The historical hydraulic parameter compensation values ​​refer to the compensation adjustment values ​​that the system has made based on factors such as temperature and hydraulic oil type in order to achieve the predetermined mold opening and closing positions during the actual production process. These compensation values ​​are the output data that the model needs to learn, that is, the pressure or flow compensation values ​​required under specific input conditions.

[0054] The neural network model is trained using the collected input data (hydraulic oil model, temperature, standard hydraulic data, etc.) and the corresponding output data (compensation value). During the training process, the model gradually adjusts its internal parameters to find the best mapping relationship between the input data and the compensation output value.

[0055] The termination condition of model training is the preset training standard, which is usually a certain error threshold or number of training rounds. When the error between the compensation value predicted by the model and the actual historical compensation value reaches the standard, or the number of training rounds reaches the preset value, the training ends and the optimized hydraulic oil compensation model is obtained.

[0056] Specifically, the hydraulic equipment used three different hydraulic oil types (such as type A, type B, and type C) in the historical records, and the hydraulic parameters (pressure and flow) and the end positions of mold opening and closing at different ambient temperatures (such as 25°C, 30°C, and 35°C). These data will be used as input data sets to train the hydraulic oil compensation model.

[0057] When the hydraulic oil temperature is 30°C and type A hydraulic oil is used, the historical data records show that 2 bar pressure and 1% flow are increased as compensation. Such compensation values ​​will be used as the output values ​​of the training data to help the model learn the compensation required under different conditions.

[0058] The neural network is trained multiple times using the collected historical data. During each round of training, the model adjusts parameters to reduce the error between the predicted compensation value and the actual compensation value. After multiple trainings, the model gradually improves the accuracy of compensation prediction.

[0059] During the training process, the error between the model's predicted compensation value and the actual compensation value is reduced to less than 0.1 bar and 0.1%, which meets the preset error conditions. At this point, the training ends and the final hydraulic oil compensation model is obtained.

[0060] Step S4: Control the hydraulic equipment to work with the target hydraulic parameters, and add 1 to the current number of pieces; wherein the initial value of the current number of pieces is 0.

[0061] Here, the hydraulic equipment is adjusted according to the target hydraulic parameters so that it works at the set pressure and flow rate. After completing one injection molding cycle, the current number of pieces is recorded as 1.

[0062] Specifically, the injection molding machine operates at a pressure of 142 bar and a flow rate of 51%. After successfully completing the first product, the current number of pieces increases from 0 to 1.

[0063] In one embodiment, the standard hydraulic pressure data also includes a standard mold opening and closing end position; the standard mold opening and closing end position also includes a standard mold opening end position and a standard mold closing end position.

[0064] Here, the standard mold opening and closing end position is divided into the standard mold opening end position and the standard mold closing end position, ensuring that the injection molding machine reaches the precise position when opening and closing the mold to ensure product quality.

[0065] Reference Figure 2 After step S4, the method further comprises:

[0066] Step S201, obtaining the current mold opening end position and the current mold closing end position of the hydraulic equipment.

[0067] Here, after the mold opening and closing actions are performed, the displacement sensor is used to measure the actual end point position of the current mold opening and closing.

[0068] Step S202, determining the difference between the current mold opening end position and the standard mold opening end position as the mold opening error, and determining the difference between the current mold closing end position and the standard mold closing end position as the mold closing error.

[0069] Here, the currently detected mold opening and mold closing end positions are compared with the standard positions to calculate the position error. The mold opening error is the difference between the current mold opening end position and the standard mold opening end position, and the mold closing error is the difference between the current mold closing end position and the standard mold closing end position.

[0070] Step S203, determining whether the mold opening error or the mold closing error is within a corresponding preset position error threshold range.

[0071] Here, the preset position error threshold can be preset according to actual conditions, and can be set to ±0.5 mm.

[0072] Check whether the mold opening error and mold closing error are within the set allowable error range. If the error is within the range, it means that the mold opening and closing actions meet the requirements; if the error exceeds the range, the hydraulic parameters need to be adjusted.

[0073] Step S204: if the mold opening error and the mold closing error are both within the corresponding preset position error threshold range, the target hydraulic parameters are kept unchanged.

[0074] Here, if the mold opening and closing errors are all within the allowable range, it indicates that the current hydraulic parameters are accurate enough and no further adjustment is required. The system maintains the existing target hydraulic parameters unchanged.

[0075] Step S205: if the mold opening error or the mold closing error is not within the corresponding preset position error threshold range, the target hydraulic parameters are updated based on a preset hydraulic parameter updating method.

[0076] Here, if the mold opening error or mold closing error exceeds the set range, the system determines that the hydraulic parameters need to be adjusted, and updates the target hydraulic parameters based on the preset hydraulic parameter update method to achieve more precise control.

[0077] Specifically, under normal operation, the standard mold opening end position is 150mm, and the standard mold closing end position is 0mm. Assuming the target hydraulic parameters are 142bar (pressure) and 51% (flow), after completing one mold opening and closing under this parameter, the current number of pieces increases from 0 to 1. It is detected that the current mold opening end position is 149.4mm, and the current mold closing end position is 0.6mm. The current mold opening error is 149.4mm-150mm=-0.6mm, and the current mold closing error is 0.6mm-0mm=0.6mm. Assuming the preset error threshold is ±0.5mm. The current mold opening error is -0.6mm, which exceeds the threshold range; the mold closing error is 0.6mm, which is also out of range.

[0078] The mold opening error is -0.6mm, and the mold closing error is 0.6mm, both exceeding the error threshold range of ±0.5mm. Based on the preset compensation method (such as increasing pressure or flow), the system updates the target hydraulic parameters to 143bar and 52% to ensure that the next mold opening and closing action is closer to the standard end position.

[0079] If in one operation, the mold opening error is 0.4mm and the mold closing error is 0.3mm (both within ±0.5mm), the system will not adjust the target hydraulic parameters and continue to operate according to the current settings.

[0080] In one embodiment, referring to Figure 3 In step S205, the step of updating the target hydraulic parameters based on the preset hydraulic parameter updating method includes:

[0081] Step S301, adding 1 to the number of errors corresponding to the first real-time hydraulic oil temperature, and determining whether the number of errors is greater than a preset number of errors; wherein the initial value of the number of errors is 0.

[0082] Here, the preset error number can be preset according to the actual situation and can be set to 5. When it is detected that the mold opening and closing position error exceeds the preset range, the error number will increase by 1. The error number is used to record the number of position errors that occur continuously under the same temperature condition. The error number is compared with the preset error threshold to determine whether the target hydraulic parameters need to be adjusted.

[0083] Specifically, assuming that the system is running at a hydraulic oil temperature of 30°C, it is detected that the current mold opening and closing position error exceeds the allowable range, so the error count increases from 0 to 1. The preset error count threshold is 3 times.

[0084] Step S302: if the number of errors is greater than a preset number of errors, the target hydraulic parameters are updated based on a preset integral compensation method to obtain updated target hydraulic parameters.

[0085] Here, if the number of errors exceeds the preset threshold, it indicates that the current hydraulic parameters cannot meet the control requirements. At this time, the integral compensation method is used to gradually adjust the target hydraulic parameters to make them closer to the actual requirements. By increasing or decreasing the hydraulic parameters, the errors in the opening and closing positions of the mold can be corrected.

[0086] Specifically, at 30° C., if the number of errors reaches 6 times (exceeding the preset 5 times), integral compensation is triggered.

[0087] In one embodiment, in step S205, the step of updating the target hydraulic parameters based on the preset hydraulic parameter updating method further includes:

[0088] If the error number is less than or equal to the preset error number, the target hydraulic parameters are kept unchanged.

[0089] Here, when the number of errors is within the preset range (less than or equal to the preset number of errors), it indicates that the current hydraulic parameters are still within the acceptable control range. Therefore, no parameter adjustment is performed, and the current target hydraulic parameters remain unchanged.

[0090] Specifically, at 30° C., assuming that the number of errors is 2 times (lower than the preset 5 times), no compensation adjustment is performed and the target hydraulic parameters remain unchanged.

[0091] In one embodiment, referring to Figure 4 In step S302, based on the preset integral compensation method, the target hydraulic parameters are updated to obtain the updated target hydraulic parameters, including:

[0092] Step S401, calculating the average error of the mold opening error and the mold closing error; the average error value is a positive number or a negative number.

[0093] Here, based on the currently detected mold opening error and mold closing error, the average value of the two error values ​​is calculated. The positive or negative value of the error average value indicates the direction in which the mold opening and closing deviates from the standard position.

[0094] Specifically, assuming that the current mold opening error is -0.6 mm (lower than the standard mold opening position), the mold closing error is 0.4 mm (higher than the standard mold closing position), the error average is (-0.6+0.4) / 2=-0.1 mm, and the determined error average is a negative number.

[0095] Step S402, determining whether the error average is a positive number.

[0096] Here, the positive or negative value of the error average is judged to determine the adjustment direction of the target hydraulic parameters. If the error average is a positive number, it means that the hydraulic parameters of the system are too high and need to be reduced; if the error average is a negative number, it means that the hydraulic parameters are insufficient and need to be increased.

[0097] Specifically, the error average is -0.1 mm, which is a negative number, so the hydraulic parameters need to be increased.

[0098] Step S403: If the error average value is a positive number, the minimum integral increment is reduced on the target hydraulic parameter to obtain an updated target hydraulic parameter.

[0099] Here, the minimum integral increment is preset according to the actual situation, and is used to gradually increase the pressure and flow in the target hydraulic parameters. The minimum integral increment includes the minimum pressure integral increment and the minimum flow integral increment, and the units are pressure units (such as bar) or flow units (such as %). The minimum pressure integral increment can be set to 1 bar, and the minimum flow integral increment can be set to 0.1%.

[0100] If the error mean is positive, it means that the pressure and flow of the hydraulic equipment are too high. Reduce the minimum integral increment on the target hydraulic parameter to adjust the accuracy of the mold opening and closing position.

[0101] Step S404: if the error average value is a negative number, the minimum integral increment is added to the target hydraulic parameter to obtain an updated target hydraulic parameter.

[0102] Here, if the error mean is negative, it means that the pressure and flow of the hydraulic equipment are insufficient. A minimum integral increment is added to the target hydraulic parameter to correct the mold opening and closing positions.

[0103] In one embodiment, after the step of updating the target hydraulic parameters in step S205, the method further includes:

[0104] An effective compensation data set is generated based on the first real-time hydraulic oil temperature and the updated target hydraulic parameter.

[0105] Here, after updating the target hydraulic parameters, key data in this operation are recorded, including the first real-time hydraulic oil temperature and the adjusted target hydraulic parameters (such as updated pressure and flow). These data are used as effective compensation samples and added to the effective compensation data set to reflect the precise compensation parameters required under the current temperature conditions.

[0106] Specifically, assuming that the current first real-time hydraulic oil temperature is 30° C., the updated target hydraulic parameters are 142.5 bar (pressure) and 51.5% (flow rate). The temperature and compensated hydraulic parameters of this operation are stored as effective compensation data.

[0107] The hydraulic oil compensation model is incrementally trained based on the effective compensation data set to obtain an updated hydraulic oil compensation model.

[0108] Here, the hydraulic oil compensation model is incrementally trained using an effective compensation data set, that is, new effective compensation data samples are gradually added to the existing model to continuously optimize the model so that it can more accurately predict the compensation parameters under different temperatures and working conditions. Incremental training helps the hydraulic oil compensation model adapt to new environmental conditions or working conditions and enhances the model's self-learning ability and real-time performance.

[0109] Specifically, the compensation data (142.5 bar pressure and 51.5% flow corresponding to 30°C) is added to the compensation data set. The neural network model is incrementally trained using this new sample, and the model weights are gradually adjusted so that the model can output the corresponding compensation value more accurately when the temperature is 30°C or similar conditions in the future. After multiple incremental trainings, the model's prediction ability is continuously improved, achieving higher compensation accuracy.

[0110] Step S5: Acquire the second real-time hydraulic oil temperature corresponding to the hydraulic equipment.

[0111] Here, at the beginning of the next injection molding cycle, the real-time hydraulic oil temperature is measured again, and a second real-time hydraulic oil temperature is obtained to check whether the temperature changes.

[0112] Step S6: Determine whether the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature.

[0113] Specifically, the second real-time hydraulic oil temperature is measured to be 31°C, and it is determined whether the second real-time hydraulic oil temperature (31°C) is the same as the first real-time hydraulic oil temperature (30°C). Temperature changes will affect viscosity, and compensation parameters need to be recalculated. At this time, a temperature rise of 1°C (30°C to 31°C) is detected, indicating that the temperature has changed.

[0114] Step S7: If the second real-time hydraulic oil temperature is different from the first real-time hydraulic oil temperature, repeat steps S2-S6 until the current number of pieces is the same as the target number of pieces.

[0115] Here, if the temperature changes, steps S2 to S6 are re-executed to obtain new compensation values ​​and update the target hydraulic parameters to ensure that the equipment maintains the best state under the new temperature conditions.

[0116] Specifically, the standard hydraulic data is queried again, a new temperature of 31°C is input for compensation, and the updated target hydraulic parameters are obtained. The injection molding machine continues to produce until the 100-piece target is reached.

[0117] In one embodiment, after step S6, the method further includes:

[0118] If the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature, steps S4-S6 are repeated until the current number of pieces is the same as the target number of pieces.

[0119] Here, if the temperature does not change, the machine continues to operate with the current target hydraulic parameters until the current number of pieces reaches the target number of pieces.

[0120] Specifically, the first real-time hydraulic oil temperature is 30° C., and after the injection molding is completed, the second real-time hydraulic oil temperature is still measured to be 30° C., so it is determined that the temperature has not changed.

[0121] Assume that the target number of pieces is 100 pieces and the current number of pieces is 1 piece. After the injection molding is completed, the second real-time hydraulic oil temperature is still 30°C. The system does not need to adjust the compensation value and continues to perform injection molding according to the current target hydraulic parameters (such as 142.5 bar pressure and 51.5% flow). After each cycle, the current number of pieces is increased by 1, and the same judgment and operation are continued until it reaches 100 pieces.

[0122] An embodiment of the present invention provides a control method for hydraulic equipment, which is applied to a controller of an injection molding machine, and the injection molding machine also includes a hydraulic equipment that is communicatively connected to the controller; the method includes: S1: obtaining a target number of pieces, a current hydraulic oil model corresponding to the hydraulic equipment, and a first real-time hydraulic oil temperature; S2: determining standard hydraulic data corresponding to the current hydraulic oil model; the standard hydraulic data includes standard hydraulic parameters and standard mold opening and closing end positions; S3: inputting the first real-time hydraulic oil temperature into a pre-trained hydraulic oil compensation model to obtain a hydraulic parameter compensation value, and determining the sum of the standard hydraulic parameter and the hydraulic parameter compensation value as the target hydraulic parameter; S4: controlling the hydraulic equipment to work with the target hydraulic parameter, and adding 1 to the current number of pieces; wherein the initial value of the current number of pieces is 0; S5: obtaining a second real-time hydraulic oil temperature corresponding to the hydraulic equipment; S6: determining whether the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature; S7: if the second real-time hydraulic oil temperature is different from the first real-time hydraulic oil temperature, repeating steps S2-S6 until the current number of pieces is the same as the target number of pieces. In this way, by real-time monitoring of the hydraulic oil temperature and dynamically adjusting the hydraulic parameters based on temperature changes, the accuracy of mold opening and closing can be maintained under different temperature conditions, thereby reducing production errors and improving product qualification and consistency. By automatically generating effective compensation data sets and incrementally training the hydraulic oil compensation model, the model can continuously adapt to new working conditions, thereby enhancing the intelligence level of the system and improving the stability and reliability of the production process.

[0123] Embodiment 2:

[0124] Figure 5 This is a schematic diagram of a control system of a hydraulic device provided in Embodiment 2 of the present invention.

[0125] The control system of the hydraulic equipment is applied to the controller of the injection molding machine, and the injection molding machine also includes the hydraulic equipment which is communicatively connected with the controller.

[0126] Reference Figure 5 , control system of hydraulic equipment, including:

[0127] The data acquisition module 1 is used to obtain the current hydraulic oil model and the first real-time hydraulic oil temperature corresponding to the hydraulic equipment.

[0128] The standard hydraulic data acquisition module 2 is used to determine the standard hydraulic data corresponding to the current hydraulic oil model; the standard hydraulic data includes standard hydraulic parameters and standard mold opening and closing end positions.

[0129] The target hydraulic parameter determination module 3 is used to input the first real-time hydraulic oil temperature into a pre-trained hydraulic oil compensation model to obtain a hydraulic parameter compensation value, and determine the sum of the standard hydraulic parameter and the hydraulic parameter compensation value as the target hydraulic parameter.

[0130] The hydraulic equipment control module 4 is used to control the hydraulic equipment to work with target hydraulic parameters and add 1 to the current number of pieces; wherein the initial value of the current number of pieces is 0.

[0131] The data acquisition module 1 is also used to acquire the second real-time hydraulic oil temperature corresponding to the hydraulic equipment.

[0132] The temperature judgment module 5 is used to judge whether the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature.

[0133] The temperature judgment module 5 is also used to call the standard hydraulic data acquisition module 2, the target hydraulic parameter determination module 3, the hydraulic equipment control module 4 and the data acquisition module 1 if the second real-time hydraulic oil temperature is different from the first real-time hydraulic oil temperature until the current number of pieces is the same as the target number of pieces.

[0134] In one embodiment, the target hydraulic parameter determination module 3 is further used for:

[0135] The historical hydraulic oil model, standard hydraulic data, historical hydraulic oil temperature, historical hydraulic parameters and historical mold opening and closing end positions of the hydraulic equipment are used as input, and the historical hydraulic parameter compensation values ​​are used as output. The neural network model is trained until the preset training conditions are met to obtain a trained hydraulic oil compensation model.

[0136] In one embodiment, the standard hydraulic pressure data also includes a standard mold opening and closing end position; the standard mold opening and closing end position also includes a standard mold opening end position and a standard mold closing end position.

[0137] The hydraulic equipment control module 4 is also used for:

[0138] Get the current mold opening end position and the current mold closing end position of the hydraulic equipment.

[0139] The difference between the current mold opening end position and the standard mold opening end position is determined as the mold opening error, and the difference between the current mold closing end position and the standard mold closing end position is determined as the mold closing error.

[0140] Determine whether the mold opening error or the mold closing error is within the corresponding preset position error threshold range.

[0141] If the mold opening error and the mold closing error are both within the corresponding preset position error threshold range, the target hydraulic parameters are kept unchanged.

[0142] If the mold opening error or the mold closing error is not within the corresponding preset position error threshold range, the target hydraulic parameters are updated based on the preset hydraulic parameter updating method.

[0143] In one embodiment, the hydraulic equipment control module 4 is further used for:

[0144] The number of errors corresponding to the first real-time hydraulic oil temperature is increased by 1, and it is determined whether the number of errors is greater than a preset number of errors; wherein the initial value of the number of errors is 0.

[0145] If the number of errors is greater than a preset number of errors, the target hydraulic parameter is updated based on a preset integral compensation method to obtain an updated target hydraulic parameter.

[0146] In one embodiment, the hydraulic equipment control module 4 is further used for:

[0147] If the error number is less than or equal to the preset error number, the target hydraulic parameters are kept unchanged.

[0148] In one embodiment, the hydraulic equipment control module 4 is further used for:

[0149] Calculate the error average of the mold opening error and the mold closing error; the error average is a positive or negative number.

[0150] Determine whether the error mean is a positive number.

[0151] If the error average is a positive number, the minimum integral increment is reduced on the target hydraulic parameter to obtain an updated target hydraulic parameter.

[0152] If the error mean value is negative, the minimum integral increment is added to the target hydraulic parameter to obtain an updated target hydraulic parameter.

[0153] In one embodiment, the target hydraulic parameter determination module 3 is further used for:

[0154] An effective compensation data set is generated based on the first real-time hydraulic oil temperature and the updated target hydraulic parameter.

[0155] The hydraulic oil compensation model is incrementally trained based on the effective compensation data set to obtain an updated hydraulic oil compensation model.

[0156] The embodiment of the present invention provides a control system for hydraulic equipment, which is applied to the controller of an injection molding machine. The injection molding machine also includes hydraulic equipment that is connected to the controller in communication. In this method, by real-time monitoring of the hydraulic oil temperature and dynamically adjusting the hydraulic parameters based on the temperature change, the accuracy of mold opening and closing can be maintained under different temperature conditions, thereby reducing production errors and improving the qualified rate and consistency of products. By automatically generating an effective compensation data set and incrementally training the hydraulic oil compensation model, the model can be continuously adapted to new working conditions, thereby enhancing the intelligence level of the system and improving the stability and reliability of the production process.

[0157] Embodiment three:

[0158] Figure 6 This is a schematic diagram of the injection molding machine provided in Example 3 of the present invention.

[0159] Reference Figure 6 The injection molding machine includes an injection molding machine body 11, and a controller 12, a hydraulic device 13, a displacement sensor 131 and a temperature sensor 132 arranged in the injection molding machine body 11, and also the control system 121 of the hydraulic device mentioned above; the control system 121 of the hydraulic device is arranged in the controller 12; the controller 12 is communicatively connected with the hydraulic device 13; the temperature sensor 132 is used to measure the temperature of the hydraulic oil; the displacement sensor 131 is used to measure the opening and closing position of the mold; the temperature sensor 132 and the displacement sensor 131 are both communicatively connected with the controller 12.

[0160] Here, there is at least one temperature sensor 132 , and the temperature sensor 132 is used to measure the temperature of the hydraulic oil.

[0161] The temperature sensor 132 can be directly installed in the hydraulic oil tank to monitor the temperature of the hydraulic oil. It can also be installed at a key position of the hydraulic oil circuit (such as the oil pump outlet or the oil return port) to monitor the hydraulic oil temperature in the hydraulic equipment in real time.

[0162] The displacement sensor 131 is used to measure the mold opening and closing positions. It can be set on the piston rod of the hydraulic cylinder to accurately measure the telescopic displacement of the hydraulic cylinder, thereby controlling the mold opening and closing positions. It can also be installed on the guide mechanism or guide column to track the movement of the mold along the guide track during the opening and closing process. It can also be installed on the moving platform of the mold to monitor the displacement state of the mold opening and closing by measuring the position of the platform.

[0163] The embodiment of the present invention provides a controller for an injection molding machine, which can change the hydraulic parameters of the hydraulic equipment according to the real-time change of the hydraulic oil temperature, thereby reducing the opening and closing mold position deviation caused by oil temperature fluctuations, thereby improving production efficiency and finished product quality.

[0164] The computer program product provided in the embodiment of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method described in the previous method embodiment. The specific implementation can be found in the method embodiment and will not be repeated here.

[0165] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0166] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0167] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0168] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0169] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A control method for hydraulic equipment, characterized in that: A controller applied to an injection molding machine, wherein the injection molding machine further comprises a hydraulic device in communication connection with the controller; the method comprises: S1: Obtaining the target number of pieces, the current hydraulic oil model corresponding to the hydraulic equipment, and the first real-time hydraulic oil temperature; S2: Determine the standard hydraulic data corresponding to the current hydraulic oil model; the standard hydraulic data includes standard hydraulic parameters and standard mold opening and closing end positions; S3: inputting the first real-time hydraulic oil temperature into a pre-trained hydraulic oil compensation model to obtain a hydraulic parameter compensation value, and determining the sum of the standard hydraulic parameter and the hydraulic parameter compensation value as a target hydraulic parameter; S4: Control the hydraulic equipment to work with the target hydraulic parameters, and add 1 to the current number of pieces; wherein the initial value of the current number of pieces is 0; S5: Acquire a second real-time hydraulic oil temperature corresponding to the hydraulic equipment; S6: Determine whether the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature; S7: If the second real-time hydraulic oil temperature is different from the first real-time hydraulic oil temperature, repeat steps S2-S6 until the current number of pieces is the same as the target number of pieces.

2. The control method of hydraulic equipment according to claim 1, characterized in that: The hydraulic oil compensation model is trained in the following way: The historical hydraulic oil model, standard hydraulic data, historical hydraulic oil temperature, historical hydraulic parameters and historical mold opening and closing end positions of the hydraulic equipment are used as input, and the historical hydraulic parameter compensation value is used as output. The neural network model is trained until the preset training conditions are met to obtain a trained hydraulic oil compensation model.

3. The control method of hydraulic equipment according to claim 1, characterized in that: The standard hydraulic data also includes a standard mold opening and closing end position; the standard mold opening and closing end position also includes a standard mold opening end position and a standard mold closing end position; After the step of controlling the hydraulic equipment to operate at the target hydraulic parameters and adding 1 to the current number of pieces, the method further includes: Obtaining the current mold opening end point position and the current mold closing end point position of the hydraulic equipment; Determine the difference between the current mold opening end position and the standard mold opening end position as the mold opening error, and determine the difference between the current mold closing end position and the standard mold closing end position as the mold closing error; Determining whether the mold opening error or the mold closing error is within a corresponding preset position error threshold range; If the mold opening error and the mold closing error are both within the corresponding preset position error threshold range, keeping the target hydraulic parameters unchanged; If the mold opening error or the mold closing error is not within the corresponding preset position error threshold range, the target hydraulic parameter is updated based on a preset hydraulic parameter updating method.

4. The control method of hydraulic equipment according to claim 3, characterized in that: The step of updating the target hydraulic parameters based on the preset hydraulic parameter updating method includes: Add 1 to the error number corresponding to the first real-time hydraulic oil temperature, and determine whether the error number is greater than a preset error number; wherein the initial value of the error number is 0; If the number of errors is greater than the preset number of errors, the target hydraulic parameter is updated based on a preset integral compensation method to obtain an updated target hydraulic parameter.

5. The control method of hydraulic equipment according to claim 4, characterized in that: Based on the preset hydraulic parameter updating method, the step of updating the target hydraulic parameter further includes: If the number of errors is less than or equal to the preset number of errors, the target hydraulic parameter is kept unchanged.

6. The control method of hydraulic equipment according to claim 4, characterized in that: The step of updating the target hydraulic parameter based on the preset integral compensation method to obtain the updated target hydraulic parameter includes: Calculating the average error of the mold opening error and the mold closing error; the average error value is a positive number or a negative number; Determine whether the error average is the positive number; If the error average value is the positive number, reducing the minimum integral increment on the target hydraulic parameter to obtain an updated target hydraulic parameter; If the error average value is the negative number, the minimum integral increment is added to the target hydraulic parameter to obtain the updated target hydraulic parameter.

7. The control method of hydraulic equipment according to claim 3, characterized in that: After the step of updating the target hydraulic parameters based on the preset hydraulic parameter updating method, the method further includes: generating an effective compensation data set based on the first real-time hydraulic oil temperature and the updated target hydraulic parameter; The hydraulic oil compensation model is incrementally trained based on the effective compensation data set to obtain an updated hydraulic oil compensation model.

8. The control method of hydraulic equipment according to claim 1, characterized in that: After the step of determining whether the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature, the method further includes: If the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature, steps S4-S6 are repeated until the current number of pieces is the same as the target number of pieces.

9. A control system for hydraulic equipment, characterized in that: A controller applied to an injection molding machine, wherein the injection molding machine further comprises a hydraulic device in communication connection with the controller; the system comprises: A data acquisition module, used to acquire a current hydraulic oil model and a first real-time hydraulic oil temperature corresponding to the hydraulic equipment; A standard hydraulic data acquisition module is used to determine the standard hydraulic data corresponding to the current hydraulic oil model; the standard hydraulic data includes standard hydraulic parameters and standard mold opening and closing end positions; a target hydraulic parameter determination module, configured to input the first real-time hydraulic oil temperature into a pre-trained hydraulic oil compensation model to obtain a hydraulic parameter compensation value, and determine the sum of the standard hydraulic parameter and the hydraulic parameter compensation value as a target hydraulic parameter; A hydraulic equipment control module, used for controlling the hydraulic equipment to work at the target hydraulic parameters and adding 1 to the current number of pieces; wherein the initial value of the current number of pieces is 0; The data acquisition module is further used to acquire a second real-time hydraulic oil temperature corresponding to the hydraulic equipment; a temperature determination module, configured to determine whether the second real-time hydraulic oil temperature is the same as the first real-time hydraulic oil temperature; The temperature judgment module is also used to call the standard hydraulic data acquisition module, the target hydraulic parameter determination module, the hydraulic equipment control module and the data acquisition module if the second real-time hydraulic oil temperature is different from the first real-time hydraulic oil temperature until the current number of pieces is the same as the target number of pieces.

10. An injection molding machine, characterized in that: It includes an injection molding machine body, and a controller, hydraulic equipment, displacement sensor and temperature sensor arranged in the injection molding machine body, and also includes the control system of the hydraulic equipment according to claim 9; the control system of the hydraulic equipment is arranged in the controller; the controller is communicatively connected with the hydraulic equipment; the temperature sensor is used to measure the temperature of the hydraulic oil; the displacement sensor is used to measure the opening and closing position of the mold; the temperature sensor and the displacement sensor are both communicatively connected with the controller.

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