Servo press balance cylinder system and control method

Abstract

The application provides a servo press balance cylinder system and a control method. The servo press balance cylinder system is applied to a servo press. The servo press comprises a mold, a moving mechanism and a driving part. The servo press balance cylinder system comprises a balance cylinder and a balance valve. The balance cylinder is connected to the moving mechanism to provide a balance force for the servo press. The control method comprises the following steps: receiving a first preset value, and controlling the balance valve to initialize and adjust the pressure in the servo press balance cylinder system based on the first preset value; receiving real-time pressure data in the servo press balance cylinder system, operation parameters of the driving part and load data of the moving mechanism, generating a pressure correction signal based on the real-time pressure data, the operation parameters and the load data, combining pre-input device parameters of the servo press balance cylinder system, and readjusting the pressure in the servo press balance cylinder system through the balance valve, so that the pressure in the servo press balance cylinder system reaches a dynamic balance state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of press machines, in particular to a servo press balance cylinder system and a control method. BACKGROUND

[0002] As a high-precision and high-efficiency forming equipment, a press machine is widely used in the manufacturing of precision parts in the fields of automobiles, aerospace, etc. The core advantage of using a servo press to manufacture parts is that the weight of a slide and a die is offset by the pressure of gas in a balance cylinder, so as to reduce the energy consumption of a motor and improve the working precision and stability of the servo press.

[0003] In the related art, the pressure regulation method for the internal pressure of the balance cylinder is to monitor and feedback the pressure in the balance cylinder through a pressure sensor. However, in the actual operation process, the pressure regulation method only regulates the pressure according to the pressure data, which leads to poor stability and pressure regulation precision of the servo press balance cylinder system. SUMMARY

[0004] Therefore, the present application provides a servo press balance cylinder system and a control method, which dynamically regulate the internal pressure of the servo press balance cylinder, reduce the energy consumption of the motor, and improve the overall precision and stability of the servo press.

[0005] In a first aspect, an embodiment of the present application provides a control method of a servo press balance cylinder system, the servo press balance cylinder system being applied to a servo press, the servo press comprising a die, a motion mechanism, and a driving member for driving the motion mechanism, the servo press balance cylinder system comprising a balance cylinder and a balance valve for adjusting the pressure of the balance cylinder, the balance cylinder being used to connect to the motion mechanism to provide a balance force for the motion mechanism, and the control method comprising:

[0006] receiving a first preset value, and controlling the balance valve to initialize the regulation of the pressure in the servo press balance cylinder system based on the first preset value;

[0007] receiving real-time pressure data in the servo press balance cylinder system, operation parameters of the driving member, and load data of the motion mechanism, generating a pressure correction signal based on the real-time pressure data, the operation parameters, and the load data in combination with pre-input device parameters of the servo press balance cylinder system, and re-regulating the pressure in the servo press balance cylinder system through the balance valve, so as to make the pressure in the servo press balance cylinder system reach a dynamic balance state.

[0008] In the technical scheme, when the pressure in the balance cylinder system of the servo press reaches a dynamic balance state, the operation parameter of the driving member is in a preset first range.

[0009] In the technical scheme, the first preset value is obtained based on a mapping relationship between the weight of the mold and the motion mechanism of the servo press and a weight-pressure value.

[0010] In the technical scheme, the receiving of the real-time pressure data in the balance cylinder system of the servo press, the operation parameter of the driving member and the load data of the motion mechanism, the generation of a pressure correction signal based on the real-time pressure data, the operation parameter and the load data, and the combination of the pre-input device parameters of the balance cylinder system of the servo press include:

[0011] obtaining first data based on the real-time pressure data and the pre-input device parameters of the balance cylinder system of the servo press;

[0012] obtaining the balance force output by the balance cylinder system of the servo press when the motion mechanism acts based on the first data and the load data, and obtaining the driving torque output by the driving member based on the operation parameter, wherein the driving torque is in a positive proportional relationship with the operation parameter;

[0013] generating a pressure correction signal based on the load data, a mapping relationship among the balance force, the driving torque and the pressure value and the real-time pressure data.

[0014] In the technical scheme, the generation of the pressure correction signal based on the load data, the mapping relationship among the balance force, the driving torque and the pressure value and the real-time pressure data further includes:

[0015] obtaining a first pressure value based on the load data and a mapping relationship between the load data and the pressure value;

[0016] obtaining a second pressure value based on the balance force, the driving torque and the mapping relationship among the balance force, the driving torque and the pressure value;

[0017] when a deviation between the first pressure value and the second pressure value is within a preset threshold, generating the pressure correction signal based on the first pressure value, the second pressure value and the real-time pressure data.

[0018] In the technical scheme, the control of the balance valve to initialize and adjust the pressure in the balance cylinder system of the servo press based on the received first preset value further includes:

[0019] receiving a measured pressure value in the balance cylinder system of the servo press;

[0020] a first pressure deviation is obtained based on the measured pressure value and the first preset value, and the pressure in the servo press balancing cylinder system is adjusted according to the first pressure deviation.

[0021] In the technical solution, after the servo press balancing cylinder system reaches the dynamic balance state, the control method further comprises:

[0022] receiving real-time pressure data in the servo press balancing cylinder system;

[0023] a second pressure deviation is obtained based on the real-time pressure data and the operating parameter, and when the second pressure deviation exceeds a second preset value, the balancing valve is controlled to perform a pressure fine-tuning compensation operation, so that the pressure in the servo press balancing cylinder system is always maintained in a dynamic balance state.

[0024] In the technical solution, the first pressure deviation is obtained based on the measured pressure value and the first preset value, and the pressure in the servo press balancing cylinder system is adjusted according to the first pressure deviation, which further comprises:

[0025] When the first pressure deviation exceeds the first preset value, the balancing valve is controlled to perform a gas discharge compensation operation until the first pressure deviation is less than the first preset value.

[0026] In a second aspect, the embodiments of the present application provide a servo press balancing cylinder system, comprising:

[0027] a gas source;

[0028] a first gas branch connected to the gas source;

[0029] a balancing valve arranged in the first gas branch;

[0030] a plurality of balancing cylinders connected to the first gas branch through the balancing valve, and the balancing valve is used to adjust the output gas pressure of the plurality of balancing cylinders;

[0031] a gas pressure detection element arranged between the balancing valve and the plurality of balancing cylinders, and the gas pressure detection element is used to detect the pressure value in the first gas branch and the plurality of balancing cylinders.

[0032] In the technical solution, the servo press balancing cylinder system further comprises:

[0033] a first gas storage tank and a second gas storage tank connected to the first gas branch, respectively;

[0034] The plurality of balance cylinders comprises at least one first balance cylinder connected to the first gas tank and at least one second balance cylinder connected to the second gas tank, and the number of the first balance cylinders is the same as that of the second balance cylinders.

[0035] In the technical scheme, the servo press balance cylinder system further comprises:

[0036] A second gas branch is connected to the gas source and is connected in parallel with the first gas branch.

[0037] The second gas branch and the first gas branch are switchably communicated between the gas source, the first gas tank and the second gas tank.

[0038] In a third aspect, an embodiment of the present application provides a control device of a servo press balance cylinder system, comprising: an initialization adjustment module configured to receive a first preset value and control a balance valve to initialize and adjust pressure in the servo press balance cylinder system based on the first preset value.

[0039] A re-adjustment module is configured to receive real-time pressure data in the servo press balance cylinder system, operation parameters of the driving member and load data of the motion mechanism, generate a pressure correction signal based on the real-time pressure data, the operation parameters and the load data in combination with pre-input device parameters of the servo press balance cylinder system, and re-adjust the pressure in the servo press balance cylinder system through the balance valve to make the pressure in the servo press balance cylinder system reach a dynamic balance state.

[0040] In a fourth aspect, an embodiment of the present application provides an electronic device, which comprises a processor and a memory, the memory stores programs or instructions executable on the processor, and the programs or instructions are executed by the processor to implement steps of the method in the first aspect.

[0041] In a fifth aspect, an embodiment of the present application provides a readable storage medium, which stores programs or instructions, and the programs or instructions are executed by a processor to implement steps of the method in the first aspect.

[0042] In a sixth aspect, an embodiment of the present application provides a chip, which comprises a processor and a communication interface, the communication interface and the processor are coupled, and the processor is configured to run programs or instructions to implement the method in the first aspect.

[0043] In a seventh aspect, an embodiment of the present application provides a computer program product, which is stored in a storage medium, and the program product is executed by at least one processor to implement the method in the first aspect.

[0044] In the embodiment of the present application, the control method of the servo press balance cylinder system adds a dynamic balance adjustment stage on the basis of the existing static balance adjustment stage. The controller receives real-time pressure data in the servo press balance cylinder system, running parameters of the driving part and load data of the motion mechanism in the dynamic balance adjustment stage, and combines pre-input parameters of the servo press balance cylinder system to readjust the pressure in the servo press balance cylinder, so as to ensure that the driving part provides stable driving force for the slider in the working process of the servo press, thereby improving the precision of the prepared part, reducing the energy consumption of the driving part, and at the same time, the stable operation of the servo press balance cylinder system can reduce noise and abnormal wear of the guide rail and sliding bearing, thereby prolonging the service life of the servo press.

[0045] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0046] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0047] Figure 1 A flowchart of a control method of a servo press balance cylinder system according to an embodiment of the present application is shown;

[0048] Figure 2 A flowchart of a control method of a servo press balance cylinder system according to an embodiment of the present application is shown;

[0049] Figure 3 A flowchart of a control method of a servo press balance cylinder system according to an embodiment of the present application is shown;

[0050] Figure 4 A flowchart of a control method of a servo press balance cylinder system according to an embodiment of the present application is shown;

[0051] Figure 5 A structure diagram of a servo press balance cylinder system according to an embodiment of the present application is shown;

[0052] Figure 6 A structure diagram of a control method of a servo press balance cylinder system according to an embodiment of the present application is shown.

[0053] Explanation of reference signs:

[0054] 1 - servo press balance cylinder system, 101 - gas source, 102 - first gas branch, 103 - balance valve, 1031 - pressure booster, 1032 - pressure relief device, 104 - multiple balance cylinders, 1041 - first balance cylinder, 1042 - second balance cylinder, 105 - gas pressure detection element, 106 - first gas tank, 107 - second gas tank, 108 - second gas branch, 109 - third gas branch, 110 - first ball valve, 111 - first check valve, 112 - first silencer, 113 - first pressure gauge, 114 - first safety valve, 115 - pressure relay, 116 - second safety valve, 117 - second pressure gauge, 118 - controller, 119 - fourth gas branch, 120 - fifth gas branch, 121 - second ball valve, 122 - third ball valve, 123 - second silencer, 124 - fourth ball valve, 125 - pressure reducing valve, 126 - second check valve, 127 - fifth ball valve. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0056] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the objects before and after are in a "or" relationship.

[0057] The servo press balance cylinder system and control method, device, and storage medium provided by the embodiments of the present application will be described in detail below with reference to the drawings and specific embodiments and their application scenarios. Preferably, the embodiments of the present application can be used in servo presses. In the case of no conflict, the embodiments described below and the features in the embodiments can be combined with each other.

[0058] The servo press comprises a servo press balance cylinder system, a driving torque, a motion mechanism, a die and a control system, the motion mechanism comprises a slider and a kinematic pair, and the driving part comprises a servo motor. The servo press balance cylinder system comprises a controller, a balance cylinder and a balance valve for adjusting the pressure in the servo press balance cylinder system, the balance cylinder is connected to the motion mechanism of the servo press to provide a balance force for the servo press, and the servo press comprises a driving part for driving the motion mechanism. Specifically, the slider is connected to the kinematic pair, the die is arranged below the slider and moves up and down with the slider under the driving of the driving part, and the kinematic pair moves under the driving of the driving part.

[0059] Specifically, when the motion mechanism of the servo press is in the descending stage, the servo press balance cylinder system needs to provide an upward balance force for the die and the motion mechanism to offset the gravity of the die and the motion mechanism and the impact force generated in the die and the motion mechanism. At this time, if the balance force provided by the servo press balance cylinder system is too small, the driving part needs to output a larger driving torque, which is used not only for driving the die and the motion mechanism to move, but also for balancing the gravity of the die and the motion mechanism, thereby increasing the energy consumption of the driving part. If the balance force provided by the servo press balance cylinder system is too large, the driving torque output by the driving part is used not only for driving the motion mechanism to move, but also for removing the excessive balance force provided by the servo press balance cylinder system, which also increases the energy consumption of the driving part.

[0060] Similarly, when the motion mechanism of the servo press is in the return stage, the balance force provided by the servo press balance cylinder system can help the driving part to move the slider in the motion mechanism upward, thereby reducing the driving force required to be output by the driving part and sharing the load of the driving part. At this time, if the balance force provided by the servo press balance cylinder system is too small, the driving torque output by the driving part needs to be appropriately increased, which also increases the energy consumption of the driving part. If the balance force provided by the servo press balance cylinder system is too large, the driving torque output by the driving part becomes smaller, and the energy consumption of the driving part is reduced. However, since a high pressure needs to be maintained in the servo press balance cylinder system to provide the corresponding balance force, the energy consumption of the servo press balance cylinder system is increased, and the energy consumption of the servo press as a whole is still increased.

[0061] In summary, the control method of the servo press balance cylinder system provided in the embodiment can dynamically adjust the pressure in the servo press balance cylinder system, so that the balance force provided by the servo press balance cylinder system is always in a relatively appropriate size when the slider of the motion mechanism is in different positions, thereby achieving the purpose of reducing the energy consumption of the servo press.

[0062] As Figure 1As shown, the embodiment of the present application provides a control method of a servo press balance cylinder system, the execution subject of the method can be a controller arranged in the servo press balance cylinder system, the controller can control the working state of the balance valve and further adjust the pressure in the servo press balance cylinder system.

[0063] In step 11, the controller receives the first preset value, and based on the received first preset value, controls the balance valve to initialize and adjust the pressure in the servo press balance cylinder system.

[0064] In the embodiment of the present application, the first preset value is a value obtained based on the mapping relationship between the weight of the slider of the servo press, the weight of the mold used and the weight-pressure value, which represents the theoretical pressure value that should be reached in the servo press balance cylinder system when the servo press balance cylinder system provides corresponding balance force for the mold and the moving mechanism in a static state.

[0065] Specifically, the mold used by the servo press is placed on the gravity sensor carried by the servo press, the gravity sensor can collect the weight of the mold and send the weight of the mold to the control system of the servo press, the control system queries in the mapping relationship between the weight-pressure value based on the weight of the slider and the weight of the mold, obtains the first preset value P0 that the pressure in the servo press balance cylinder system should reach, and sends the first preset value P0 to the controller. base base

[0066] Further, the mapping relationship between the weight-pressure value can be expressed by a first formula:

[0067]

[0068] Wherein, P0 is the theoretical pressure value that should be reached in the servo press balance cylinder system, K is a preset coefficient (1.1-1.3), G0 is the weight of the slider in the moving mechanism, G1 is the weight of the mold, n is the number of balance cylinders, D is the inner diameter of the balance cylinder, and d is the rod diameter of the balance cylinder.

[0069] In the embodiment of the present application, the mapping relationship between the weight-pressure value is obtained by the slider and a plurality of molds with different weights through the calculation of the above-mentioned first formula.

[0070] ​​When the servo press has not started working, the pressure value in the servo press balancing cylinder system reaches the first preset value, the servo press balancing cylinder system can provide corresponding balance force for the static weight of the mold and the motion mechanism, thereby ensuring that the driving member provides accurate driving torque for the motion mechanism; when the servo press starts working, by adjusting the pressure in the servo press balancing cylinder system, the corresponding balance force is provided for the weight of the mold and the motion mechanism and the impact force generated when the motion mechanism moves, thereby achieving the purpose of providing relatively accurate driving torque for the motion mechanism by the driving member, and also avoiding the influence of the driving torque provided by the driving member on the precision of the manufactured parts.

[0071] The controller controls the balance valve to adjust the pressure in the balancing cylinder system based on the received first preset value sent by the control system of the servo press, so that the pressure in the balancing cylinder system reaches the first preset value to provide a balance force for the static weight of the mold and the motion mechanism.

[0072] Step 12, the controller receives real-time pressure data in the servo press balancing cylinder system, running parameters of the driving member and load data of the motion mechanism, generates a pressure correction signal based on the real-time pressure data, running parameters and load data, and combines the pre-input device parameters of the servo press balancing cylinder system to readjust the pressure in the servo press balancing cylinder system through the balance valve, so that the pressure in the servo press balancing cylinder system reaches a dynamic balance state.

[0073] The servo press balancing cylinder system is provided with a gas pressure detection element, which can detect real-time pressure data in the servo press balancing cylinder system in real time and send the real-time pressure data to the controller. The running parameters of the driving member include the current value of the driving member, and the load data of the motion mechanism includes the displacement of the slider, the angular displacement of the motion pair gap and the normal contact force between the motion pairs.

[0074] Specifically, the control system of the servo press can collect the running parameters of the driving member and the load data of the motion mechanism when the servo press is working, and send the running parameters and the load data to the controller. The controller receives and generates a pressure correction signal based on the real-time pressure data in the servo press balancing cylinder system, the running parameters of the driving member and the load data of the motion mechanism, and controls the balance valve to adjust the pressure in the servo press balancing cylinder system.

[0075] Therefore, the control method of the servo press balancing cylinder system provided by the embodiment of the present application increases the dynamic balance adjustment stage on the basis of the existing static balance adjustment stage. In the dynamic balance adjustment stage, the controller re-adjusts the pressure in the servo press balancing cylinder by receiving the real-time pressure data in the servo press balancing cylinder system, the operation parameter of the driving part and the load data of the motion mechanism, so as to ensure that the driving part provides stable driving torque for the motion mechanism in the working process of the servo press, thereby improving the precision of the prepared part, reducing the energy consumption of the driving part, and at the same time, the stable operation of the servo press balancing cylinder system can also reduce the motion noise of the slider and reduce the abnormal wear of the guide rail and bearing, thereby prolonging the service life of the servo press.

[0076] In this embodiment, when the pressure in the servo press balancing cylinder system reaches the dynamic balance state, the operation parameter of the driving part is in the preset first range.

[0077] Specifically, the controller determines that the servo press balancing cylinder system is in the dynamic balance state when the received operation parameter is in the preset first range based on the received operation parameter, and the preset first range is an interval value about the current value passed by the driving part.

[0078] Accordingly, the controller further judges the state of the servo press balancing cylinder system based on the received operation parameter and the load data, prevents errors in the judgment of the state of the servo press balancing cylinder system due to other factors, and further improves the stability and safety of the operation of the servo press balancing cylinder system.

[0079] In the embodiment of the present application, please refer to Figure 2 , step 12 can be implemented by steps 1201 to 1203:

[0080] In step 1201, the controller obtains first data based on the real-time pressure data and the pre-input device parameters of the servo press balancing cylinder system.

[0081] Specifically, the first data can be calculated according to the second formula. The second formula is:

[0082]

[0083] Wherein, α represents the first data, P base represents the first preset value, and 1 / β represents the ratio of the volume of the movable part of the balancing cylinder to the volume of the gas tank.

[0084] Further, the ratio of the volume of the movable part of the balancing cylinder to the volume of the gas tank 1 / β can be calculated by the third formula. The third formula is:

[0085]

[0086] wherein n represents the number of balance cylinders, H is the stroke of the slide, s represents the displacement of the slide, A represents the effective pressure area of a single balance cylinder, V G represents the volume of the gas tank of the balance cylinder.

[0087] Step 1202, the controller obtains the balance force output by the servo press balance cylinder system when the motion mechanism acts based on the first data and the load data, and obtains the driving torque output by the driving member based on the operating parameter, wherein the driving torque is in a positive proportional relationship with the operating parameter.

[0088] Specifically, the balance force output by the servo press balance cylinder system can be calculated by a fourth formula. The fourth formula is:

[0089]

[0090] wherein F(s) represents the balance force output by the servo press balance cylinder system when the slide is at different positions, n represents the number of balance cylinders, A represents the effective pressure area of a single balance cylinder, P base represents a first preset value, η is a friction coefficient (0.02-0.06), and a represents the first data.

[0091] Since the driving torque and the operating parameter are in a positive proportional relationship in an ideal state, the driving torque can be calculated according to the operating parameter of the driving member by a fifth formula. The fifth formula is:

[0092]

[0093] wherein T_m represents the driving torque generated by the driving member, K_t represents a torque constant, and I_q represents the current value passing through the driving member.

[0094] Step 1203, the controller generates a pressure correction signal based on the load data, the mapping relationship among the balance force, the driving torque and the pressure value, and the real-time pressure data.

[0095] Specifically, as Figure 3 shown, step 1203 can be implemented by step 1203a to step 1203c:

[0096] Step 1203a, a first pressure value is obtained based on the load data and the mapping relationship between the load data and the pressure value.

[0097] Specifically, the force sensor arranged between the motion mechanisms can collect the normal contact force between the motion mechanisms and send it to the controller, and the controller can decompose the received normal contact force into a projection F x on the x coordinate axis and a projection F yand the angular displacement of the kinematic pair in the load data is calculated according to a sixth formula. The sixth formula is:

[0098]

[0099] wherein, represents the angular displacement of the kinematic pair, F x represents the projection of the normal contact force on the x coordinate axis, F y represents the projection of the normal contact force on the y coordinate axis.

[0100] The controller can generate the first pressure value based on the real-time pressure data, the angular displacement of the kinematic pair, and a preconfigured mapping relationship between the angular displacement of the kinematic pair and the pressure value.

[0101] In step 1203b, the second pressure value is obtained based on the balancing force, the driving torque, and a mapping relationship between the balancing force and the driving torque and the pressure value.

[0102] The balancing force calculated according to the fourth formula and the driving torque calculated according to the fifth formula are corresponded to the preconfigured mapping relationship between the balancing force and the driving torque and the pressure value, to obtain the corresponding second pressure value.

[0103] In step 1203c, when the deviation between the first pressure value and the second pressure value is less than a preset threshold, a pressure correction signal is generated based on the first pressure value, the second pressure value, and the real-time pressure data.

[0104] Since the driving torque provided by the driving member is likely to increase when the balancing force provided by the servo press balancing cylinder system is too large or too small, the angular displacement of the kinematic pair and the mapping relationship between the angular displacement of the kinematic pair and the pressure value are needed to determine the current state in the servo press balancing cylinder system. Therefore, when the absolute value of the difference between the first pressure value and the second pressure value is less than the preset threshold, the corresponding relationship between the position of the slider and the kinematic pair in the motion mechanism, the driving torque provided by the driving member, the balancing force provided by the servo press balancing cylinder system, and the pressure in the current servo press balancing cylinder system can be determined. At this time, the average pressure value between the first pressure value and the second pressure value can be taken, and the real-time pressure data is subtracted from the average pressure value. A negative difference value represents that the pressure in the current servo press balancing cylinder system is insufficient, and a gas compensation operation needs to be performed. A positive difference value represents that the pressure in the current servo press balancing cylinder system is too large, and a gas compensation operation needs to be performed. The absolute value of the difference value is the value for correcting the pressure in the servo press balancing cylinder system in the pressure correction signal. A negative difference value represents that the pressure correction signal instructs the balancing valve to perform the gas compensation operation, and a positive difference value represents that the pressure correction signal instructs the balancing valve to perform the gas compensation operation.

[0105] Meanwhile, since the impact force is directly proportional to the driving torque provided by the driving member and is indirectly related to the angular displacement of the kinematic pair, when the balance force and the driving torque are matched with the pressure value in the servo press balance cylinder system, the current current value of the driving member and the angular displacement of the kinematic pair need to be combined to make the generated pressure correction signal more accurate, so as to avoid the influence of the change of a single data in the accidental situation on the pressure correction signal generated by the controller.

[0106] In summary, the controller of the servo press balance cylinder system obtains the pressure correction signal based on the real-time pressure data, the operating parameters of the driving member, the load data of the kinematic mechanism and the pre-input parameters of the servo press balance cylinder system, so as to readjust the servo press balance cylinder system which has completed the initialization adjustment to adapt to the working state of the driving member, so that the balance force provided by the servo press balance cylinder system is consistent with the impact force generated by the kinematic mechanism during operation, thereby reducing the energy consumption of the driving member and improving the stability and response speed of the servo press operation.

[0107] In the embodiments of the present application, further, as shown in Figure 4 Step 11 can be implemented by steps 1101 to 1102.

[0108] Step 1101, the controller receives the measured pressure value in the servo press balance cylinder system.

[0109] The servo press balance cylinder system is provided with a pressure sensor for detecting and transmitting the internal pressure data of the servo press balance cylinder system, and the controller receives the measured pressure value in the servo press balance cylinder system sent by the pressure sensor.

[0110] Step 1102, the controller obtains a first pressure deviation based on the measured pressure value and a first preset value, and adjusts the pressure in the servo press balance cylinder system according to the first pressure deviation.

[0111] After receiving the measured pressure value sent by the pressure sensor, the controller processes the measured pressure value and the first preset value to obtain the first pressure deviation, and controls the balance valve to adjust the pressure in the servo press balance cylinder system according to the obtained first pressure deviation. Specifically, the first pressure deviation can be calculated according to the seventh formula, and the seventh formula is:

[0112]

[0113] Where ΔP is the first pressure deviation, P real is the measured pressure value, and P base is the first preset value.

[0114] Thus, the controller generates a first pressure deviation based on the measured pressure value in the servo press balancing cylinder system and the first preset value, and controls the balancing valve according to the first pressure deviation to adjust the pressure in the servo press balancing cylinder system, so as to complete the initial adjustment of the pressure in the servo press balancing cylinder system. Through the initial adjustment of the pressure in the servo press balancing cylinder system, the corresponding balancing force can be provided for the gravity of the mold and the motion mechanism in the static state, so that the driving member can provide accurate driving torque when driving the mold and the motion mechanism to move, and the accuracy of the provided driving torque is avoided from being affected by the gravity of the mold and the motion mechanism.

[0115] In the embodiment of the present application, further, the step 1102 further includes: when the first pressure deviation exceeds the first preset value, the controller controls the balancing valve to perform a gas bleeding compensation operation until the first pressure deviation is less than the first preset value.

[0116] The controller adjusts the pressure in the servo press balancing cylinder system by controlling the balancing valve. Specifically, the difference between the pressure in the servo press balancing cylinder system and the first preset value is the first pressure deviation, when the first pressure deviation is positive and the absolute value of the first deviation is greater than the first preset value, the controller controls the balancing valve to perform a gas bleeding operation to reduce the pressure in the servo press balancing cylinder system; when the first pressure deviation is negative and the absolute value of the first pressure deviation is greater than the first preset value, the controller controls the balancing valve to perform a compensation operation to increase the pressure in the servo press balancing cylinder system.

[0117] Accordingly, the controller can adjust the pressure in the servo press balancing cylinder system to the ideal range through the above operation, so as to provide a more appropriate balancing force for the mold and the motion mechanism, and avoid that the balancing force provided by the servo press balancing cylinder system is too large or too small, which indirectly improves the accuracy of the parts made by the servo press.

[0118] In the embodiment of the present application, after the step 12, the control method of the servo press balancing cylinder system further includes:

[0119] Step 13, the controller receives real-time pressure data in the servo press balancing cylinder system.

[0120] Specifically, after the servo press balancing cylinder system has reached a dynamic balance state, the real-time pressure data in the servo press balancing cylinder system is detected by a pressure sensor arranged in the servo press balancing cylinder system, and the real-time pressure data is sent to the controller, and the controller receives the real-time pressure data in the servo press balancing cylinder system.

[0121] Step 14, the controller obtains a second pressure deviation according to the real-time pressure data and the running parameters, and controls the balance valve to perform a pressure fine-tuning compensation operation based on the second pressure deviation exceeding a second preset value, so as to maintain the pressure in the servo press balance cylinder system in a dynamic balance state.

[0122] The second preset value is the absolute value of the difference between the limit value and the average pressure value of the internal pressure of the servo press balance cylinder in the dynamic balance state. After receiving the real-time pressure data and the running parameters of the servo press balance cylinder system, the controller obtains the value of the driving torque provided by the driving member according to the current value of the driving member in the running parameters, and obtains a third pressure value according to the mapping relationship between the balance force-driving torque-pressure value. The second pressure deviation is obtained by subtracting the real-time pressure data from the third pressure value. When the absolute value of the obtained second pressure deviation is greater than the second preset value, the controller controls the balance valve to perform a gas discharge compensation or a gas charge compensation operation according to the positive or negative of the second pressure deviation. Wherein, the second pressure deviation is negative, representing that the pressure in the servo press balance cylinder system is insufficient, and the balance valve needs to perform a gas charge compensation operation. The second pressure deviation is positive, representing that the pressure in the servo press balance cylinder system is too large, and the balance valve needs to perform a gas discharge compensation operation, so as to fine-tune the pressure in the servo press balance cylinder system. In this fine-tuning process, the size of the gas charge action and the size of the gas discharge action of the balance valve are pre-set in the controller, and the action size of the balance valve does not need to be adjusted according to the size of the second pressure deviation, so as to avoid the pressure in the servo press balance cylinder system changing too drastically, and thus ensure that the pressure in the servo press balance cylinder system can be maintained in a dynamic balance state.

[0123] Due to the effect of gravity and gravity acceleration, the impact force generated by the mold and the motion mechanism during the working process is always in a dynamic change process. The controller can monitor and adjust the pressure in the servo press balance cylinder in real time based on the real-time pressure data and the preset driving torque in the servo press balance cylinder system, so as to provide a corresponding balance force for the constantly changing impact force generated by the mold and the motion mechanism during the working process, and ensure that the force received during part manufacturing completely comes from the driving torque provided by the driving member, thereby improving the precision of the parts manufactured by the servo press.

[0124] Please refer to Figure 5 The embodiment of the application also provides a servo press balance cylinder system 1, which comprises a gas source 101. Before the servo press works, the gas source 101 is used to fill gas into the servo press balance cylinder system 1, so as to provide a balance force for the gravity of the mold and the motion mechanism.

[0125] The servo press balance cylinder system 1 comprises a first gas branch 102 connected to a gas source 101. The gas source 101 supplies gas to the servo press balance cylinder system 1 through the first gas branch 102.

[0126] The servo press balance cylinder system 1 comprises a balance valve 103 arranged in the first gas branch 102. When the servo press is working, the pressure in the servo press balance cylinder system 1 is adjusted by adjusting the working state of the balance valve 103.

[0127] The servo press balance cylinder system 1 comprises a plurality of balance cylinders 104 connected to the first gas branch 102 through the balance valve 103, and the balance valve 103 is used to adjust the output gas pressure of the plurality of balance cylinders 104. The plurality of balance cylinders 104 are connected to the first gas branch 102, so that the pressure in the servo press balance cylinder system 1 can be adjusted by adjusting the working state of the balance valve 103 arranged in the first gas branch 102.

[0128] The servo press balance cylinder system 1 comprises a gas pressure detection element 105 arranged between the balance valve 103 and the plurality of balance cylinders 104, and the gas pressure detection element 105 is used to detect the pressure value in the first gas branch 102 and the plurality of balance cylinders 104. Since the first gas branch 102 and the plurality of balance cylinders 104 are connected to each other, the pressure in the first gas branch 102 is almost the same as the pressure in the plurality of balance cylinders 104, so as long as the gas pressure detection element 105 is arranged between the balance valve 103 and the plurality of balance cylinders 104.

[0129] Therefore, the servo press balance cylinder system 1 provided by the embodiment of the application supplies gas to the servo press balance cylinder system 1 through the gas source 101, the gas is filled into the plurality of balance cylinders 104 through the first gas branch 102, the pressure in the servo press balance cylinder system 1 is adjusted through the balance valve 103, and the pressure in the servo press balance cylinder system 1 is detected through the gas pressure detection element 105, so as to provide more accurate balance force for the static gravity of the mold and the moving mechanism of the servo press, thereby improving the precision of the servo press.

[0130] The servo press balance cylinder system 1 further comprises a first gas storage tank 106 and a second gas storage tank 107, and the first gas storage tank 106 and the second gas storage tank 107 are connected to the first gas branch 102 respectively. Specifically, the first gas storage tank 106 and the second gas storage tank 107 are connected between the first gas branch 102 and the plurality of balance cylinders 104, and the first gas storage tank 106 and the second gas storage tank 107 are used to store sufficient gas for the servo press balance cylinder system 1, thereby expanding the range of pressure regulation in the servo press balance cylinder system 1, and thereby improving the accuracy of the balance force provided by the servo press.

[0131] Preferably, since the gas stored in the first gas storage tank 106 and the second gas storage tank 107 is relatively large, the pressure change is relatively gentle, and therefore the gas pressure detection element 105 can be arranged in the first gas storage tank 106 to obtain relatively stable measured pressure data and real-time pressure data in the servo press balance cylinder system 1.

[0132] The plurality of balance cylinders 104 in the servo press balance cylinder system 1 comprises at least one first balance cylinder 1041 and at least one second balance cylinder 1042, the at least one first balance cylinder 1041 is connected to the first gas storage tank 106, the at least one second balance cylinder 1042 is connected to the second gas storage tank 107, and the number of the first balance cylinder 1041 and the second balance cylinder 1042 is the same. In actual application, the number of the first balance cylinder 1041 and the second balance cylinder 1042 can be increased according to actual conditions, but the number of the first balance cylinder 1041 and the second balance cylinder 1042 should always be consistent, thereby ensuring that the servo press balance cylinder system 1 can provide stable balance force, and at the same time, ensuring that the number of the first balance cylinder 1041 and the second balance cylinder 1042 is the same can also evenly distribute the gravity of the mold and the motion mechanism to the first balance cylinder 1041 and the second balance cylinder 1042, thereby ensuring that the loss of each balance cylinder is substantially consistent, thereby prolonging the service life of the servo press balance cylinder system 1.

[0133] In summary, the provision of the gas storage tank in the servo press balance cylinder system 1 can expand the range of pressure regulation in the servo press balance cylinder system 1, making the pressure provided by the servo press balance cylinder system 1 more accurate; the first gas storage tank 106 and the second gas storage tank 107 respectively communicate with the same number of first balance cylinders 1041 and second balance cylinders 1042, which can make the loss of the first gas storage tank 106, the second gas storage tank 107, and the first balance cylinder 1041 and the second balance cylinder 1042 during the operation of the servo press be at almost the same level, thereby ensuring that the working state of the first gas storage tank 106, the second gas storage tank 107, and the first balance cylinder 1041 and the second balance cylinder 1042 is almost consistent, and increasing the stability of the servo press balance cylinder system 1.

[0134] The servo press balance cylinder system 1 further comprises a second gas branch 108 connected to the gas source 101 and arranged in parallel with the first gas branch 102. The second gas branch 108 is switchably communicated between the gas source 101, the first gas tank 106 and the second gas tank 107 with the first gas branch 102.

[0135] The second gas branch 108 can serve as a backup gas branch of the first gas branch 102. When the first gas branch 102 fails to charge gas into the servo press balance cylinder system 1 due to an emergency, the second gas branch 108 can be used to charge gas into the servo press balance cylinder system 1, avoiding the servo press from stopping working due to the emergency, thereby ensuring the normal operation of the servo press.

[0136] Preferably, a third gas branch 109 is arranged on the second gas branch 108 as an emergency exhaust passage, and a pressure relief device is arranged on the third gas branch 109. When the balance valve 103 fails to work normally, the pressure relief device is opened to quickly release the pressure in the servo press balance cylinder system 1 through the third gas branch 109, ensuring the safety of the workers and enabling timely maintenance of the servo press.

[0137] The servo press balance cylinder system 1 further comprises a first ball valve 110 arranged at one end of the first gas branch 102 close to the gas source 101. When the first ball valve 110 is opened, the gas in the gas source 101 flows into the first gas branch 102 through the first ball valve 110.

[0138] The servo press balance cylinder system 1 further comprises a first check valve 111 arranged on the first gas branch 102 between the first ball valve 110 and the balance valve 103, to prevent the gas in the first gas branch 102 from flowing back into the gas source 101.

[0139] The balance valve 103 in the servo press balance cylinder system 1 comprises a pressure booster 1031 and a pressure relief device 1032, both having an inlet and an outlet. The inlet and the outlet of the pressure booster 1031 are both connected to the first gas branch 102, and the pressure relief device 1032 is arranged in parallel with the first gas branch 102, with the inlet of the pressure relief device 1032 connected to the first gas branch 102.

[0140] The servo press balance cylinder system 1 further comprises a first silencer 112 connected to the outlet of the pressure relief device 1032, to reduce the noise generated when the pressure relief device 1032 exhausts.

[0141] The servo press balancing cylinder system 1 further comprises a first pressure gauge 113 and a first safety valve 114, which can be arranged in the first gas tank 106. The first pressure gauge 113 is used to reflect the pressure value in the servo press balancing cylinder system 1; the first safety valve 114 is used to release pressure when the pressure value in the servo press balancing cylinder system 1 is too large.

[0142] The servo press balancing cylinder system 1 further comprises a pressure relay 115, a second safety valve 116 and a second pressure gauge 117, which can be arranged in the second gas tank 107. The pressure relay 115 is used to protect the servo press balancing cylinder system 1 from low pressure, and timely sends an alarm signal when the pressure in the servo press balancing cylinder system 1 is too low; the second safety valve 116 can also be used to release pressure when the pressure value in the servo press balancing cylinder system 1 is too large; and the second pressure gauge 117 can also reflect the pressure value in the servo press balancing cylinder system 1.

[0143] The servo press balancing cylinder system 1 further comprises a controller 118 connected to the balancing valve 103, the gas pressure detection element 105 and the pressure relay 115. The controller 118 can receive the measured pressure data and real-time pressure data sent by the gas pressure detection element 105, and can also receive the alarm signal sent by the pressure relay 115, and control the working state of the balancing valve 103 according to the received measured pressure data, real-time pressure data and alarm signal.

[0144] The servo press balancing cylinder system 1 further comprises a fourth gas branch 119 and a fifth gas branch 120, which are arranged in parallel. One end of the fourth gas branch 119 is connected to the first gas tank 106, one end of the fifth gas branch 120 is connected to the second gas tank 107, and the other end of the fourth gas branch 119 and the other end of the fifth gas branch 120 are connected to the first gas branch 102 and the second gas branch 108. The third gas branch 109 is arranged on the second branch close to one end of the fourth gas branch 119 and the fifth gas branch 120.

[0145] The servo press balancing cylinder system 1 further comprises a second ball valve 121 arranged at one end of the first gas branch 102 connected to the fourth gas branch 119 and the fifth gas branch 120, which remains closed to prevent gas from entering the balancing valve 103 when the servo press balancing cylinder system 1 uses the third gas branch 109 to release pressure.

[0146] The servo press balancing cylinder system 1 further comprises a third ball valve 122 and a second silencer 123, the third ball valve 122 and the second silencer 123 are arranged on the third gas branch 109, and the second silencer is arranged at the end of the third gas branch 109. The third ball valve 122 is used to control the working state of the third gas branch 109; the second silencer 123 can reduce noise when the third gas branch 109 is used for pressure relief.

[0147] The servo press balancing cylinder system 1 further comprises a fourth ball valve 124, a pressure reducing valve 125, a second check valve 126 and a fifth ball valve 127, which are arranged on the second gas branch 108 close to one end of the gas source 101. When the gas in the gas source 101 flows into the first gas tank 106 and the second gas tank 107 through the second gas branch 108, the gas flows through the fourth ball valve 124, the pressure reducing valve 125, the second check valve 126 and the fifth ball valve 127 in turn. The fourth ball valve 124 and the fifth ball valve 127 are used to control the working state of the second gas branch 108, the pressure reducing valve 125 is used to reduce the pressure of the gas flowing through the second gas branch 108 when the second gas branch 108 is working, and the second check valve 126 is used to prevent the gas in the servo press balancing cylinder system 1 from flowing back into the pressure reducing valve 125 and the gas source 101.

[0148] Further, as a specific implementation of the control method of the servo press balancing cylinder system, the embodiment of the present application provides a control device of a servo press balancing cylinder system, which comprises:

[0149] An initialization adjusting module is configured to receive a first preset value and control the balancing valve to initialize and adjust the pressure in the servo press balancing cylinder system based on the first preset value;

[0150] A re-adjusting module is configured to receive real-time pressure data in the servo press balancing cylinder system, operation parameters of the driving member and load data of the motion mechanism, generate a pressure correction signal based on the real-time pressure data, the operation parameters and the load data, and combine pre-input device parameters of the servo press balancing cylinder system to re-adjust the pressure in the servo press balancing cylinder system through the balancing valve, so that the pressure in the servo press balancing cylinder system reaches a dynamic balance state.

[0151] In some embodiments, when the pressure in the servo press balancing cylinder system reaches the dynamic balance state, the operation parameters of the driving member are within a preset first range.

[0152] In some embodiments, the first preset value is obtained based on a mapping relationship between the weight of the mold of the servo press and the motion mechanism and the weight-first preset value.

[0153] In some embodiments, the readjustment module comprises:

[0154] a first unit configured to obtain first data based on the real-time pressure data and pre-input device parameters of the servo press balancing cylinder system;

[0155] a second unit configured to obtain a balancing force output by the servo press balancing cylinder system when the motion mechanism is in action based on the first data and the load data, and obtain a driving torque output by the driving member based on the operation parameter, wherein the driving torque is in a positive proportional relationship with the operation parameter;

[0156] a third unit configured to generate a pressure correction signal based on the load data, a mapping relationship among the balancing force, the driving torque and the pressure value, and the real-time pressure data.

[0157] In some embodiments, the third unit comprises:

[0158] a first sub-unit configured to obtain a first pressure value based on the load data and a mapping relationship between the load data and the pressure value;

[0159] a second sub-unit configured to obtain a second pressure value based on the balancing force, the driving torque and a mapping relationship among the balancing force, the driving torque and the pressure value;

[0160] a third sub-unit configured to generate the pressure correction signal based on the first pressure value, the second pressure value and the real-time pressure data when a deviation between the first pressure value and the second pressure value is within a preset threshold.

[0161] In some embodiments, the initialization adjustment module comprises:

[0162] a first data receiving unit configured to receive a measured pressure value in the servo press balancing cylinder system;

[0163] a first pressure adjusting unit configured to obtain a first pressure deviation based on the measured pressure value and a first preset value, and adjust the pressure in the servo press balancing cylinder system according to the first pressure deviation.

[0164] In some embodiments, the first pressure adjusting unit further comprises:

[0165] a pressure adjusting sub-unit configured to control the balancing valve to perform a gas release compensation operation until the first pressure deviation is less than the first preset value when the first pressure deviation exceeds the first preset value.

[0166] In some embodiments, after the secondary adjustment module, the control device of the servo press balancing cylinder system further comprises:

[0167] The fine adjustment compensation module is configured to obtain a second pressure deviation based on the real-time pressure data and the operation parameter, and control the balance valve to perform pressure fine adjustment compensation operation when the second pressure deviation exceeds a second preset value, so that the pressure in the servo press balance cylinder system is always maintained in a dynamic balance state.

[0168] The control device of the servo press balance cylinder system in the embodiments of the present applicationapplicationbe an electronic device or a component in an electronic device, such as an integrated circuit or a chip. The electronic deviceapplicationbe a terminal or other device other than a terminal. For example, the electronic deviceapplicationbe a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a Mobile Internet Device (MID), an Augmented Reality (AR) / Virtual Reality (VR) device, a robot, a wearable device, an Ultra-Mobile Personal Computer (UMPC), a netbook, or a Personal Digital Assistant (PDA), andapplicationbe a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, or a self-service machine, and the like, and the embodiments of the present application are not limited in this regard.

[0169] The control device of the servo press balance cylinder systemapplicationachieve the method embodiments Figures 1 to 3 The method embodiments achieve various processes, and details are not repeated here.

[0170] The embodiments of the present application also provide an electronic device, as shown in Figure 6 The electronic device 600 includes a processor 601 and a memory 602, and the memory 602 stores a program or instruction executable on the processor 601. When the program or instruction is executed by the processor 601, each step of the control method of the servo press balance cylinder system is implemented, and the same technical effect is achieved. Details are not repeated here.

[0171] The memory 602 can be used to store software programs and various data. The memory 602 can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 602 can include a volatile memory or a non-volatile memory, or the memory 602 can include both a volatile memory and a non-volatile memory. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDR SDRAM), an Enhanced SDRAM (ESDRAM), a Synch link DRAM (SLDRAM), and a Direct Rambus RAM (DRRAM). The memory 602 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0172] The processor 601 can include one or more processing units; optionally, the processor 601 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 601.

[0173] The embodiments of the present application also provide a readable storage medium, and the readable storage medium stores programs or instructions, which are executed by a processor to implement each process of the control method embodiments of the servo press balancing cylinder system and achieve the same technical effects. To avoid repetition, details are not described here.

[0174] The embodiment of the present application further provides a chip, which comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running programs or instructions to realize each process of the control method of the servo press balance cylinder system and achieve the same technical effects. To avoid repetition, details are not repeated here.

[0175] It should be understood that the chip mentioned in the embodiment of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0176] The embodiment of the present application further provides a computer program product, which is stored in a storage medium, and is executed by at least one processor to realize each process of the control method of the servo press balance cylinder system and achieve the same technical effects. To avoid repetition, details are not repeated here.

[0177] It should be noted that in this paper, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the present application is not limited to the order of functions shown or discussed, but can also include functions performed in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method can be performed in an order different from the described order, and various steps can also be added, omitted or combined. In addition, the features described with reference to some examples can be combined in other examples.

[0178] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative, not restrictive, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A control method of a balance cylinder system of a servo press, characterized by, The servo press balance cylinder system is applied to a servo press, the servo press comprises a mold, a moving mechanism and a driving part for driving the moving mechanism, the servo press balance cylinder system comprises a balance cylinder and a balance valve for adjusting pressure of the balance cylinder, the balance cylinder is connected to the moving mechanism to provide a balance force for the moving mechanism, and the control method comprises: receiving a first preset value and controlling the balance valve to initialize adjustment of pressure in the servo press balance cylinder system based on the first preset value; receiving real-time pressure data in the servo press balance cylinder system, operation parameters of the driving part and load data of the moving mechanism, generating a pressure correction signal based on the real-time pressure data, the operation parameters and the load data in combination with pre-input device parameters of the servo press balance cylinder system, and readjusting pressure in the servo press balance cylinder system through the balance valve to make the pressure in the servo press balance cylinder system reach a dynamic balance state.

2. The control method of the servo press balance cylinder system according to claim 1, wherein when the pressure in the servo press balance cylinder system reaches the dynamic balance state, the operation parameters of the driving part are in a first preset range.

3. The control method of the servo press balance cylinder system according to claim 1, wherein the first preset value is obtained based on a mapping relationship between weights of the mold and the moving mechanism of the servo press and weight-pressure values. The receiving of the real-time pressure data in the servo press balance cylinder system, the operation parameters of the driving part and the load data of the moving mechanism, the generation of the pressure correction signal based on the real-time pressure data, the operation parameters and the load data in combination with the pre-input device parameters of the servo press balance cylinder system, comprises: obtaining first data based on the real-time pressure data and the pre-input device parameters of the servo press balance cylinder system; 4. The control method of the balancing cylinder system of the servo press according to claim 1, characterized by, obtaining the balance force output by the servo press balance cylinder system when the moving mechanism acts based on the first data and the load data, and obtaining a driving torque output by the driving part based on the operation parameters, wherein the driving torque is in a positive proportional relationship with the operation parameters; generating the pressure correction signal based on the load data, a mapping relationship among balance force-driving torque-pressure values and the real-time pressure data. The generation of the pressure correction signal based on the load data, the mapping relationship among balance force-driving torque-pressure values and the real-time pressure data further comprises: obtaining a first pressure value based on the load data and a mapping relationship between load data and pressure values; 5. The control method of the balancing cylinder system of the servo press according to claim 4, characterized by, obtaining a second pressure value based on the balance force, the driving torque and the mapping relationship among balance force-driving torque-pressure values; when a deviation between the first pressure value and the second pressure value is within a preset threshold, generating the pressure correction signal based on the first pressure value, the second pressure value and the real-time pressure data. ​ ​ 6. The control method of a servo press balance cylinder system according to claim 1, characterized by, The receiving the first preset value and controlling the balance valve to initialize and adjust the pressure in the servo press balance cylinder system based on the first preset value further comprises: Receiving the measured pressure value in the servo press balance cylinder system; Based on the measured pressure value and the first preset value, a first pressure deviation is obtained, and the pressure in the servo press balance cylinder system is adjusted according to the first pressure deviation.

7. The control method of the balancing cylinder system of the servo press according to claim 1, characterized by, After the servo press balance cylinder system reaches the dynamic balance state, the control method further comprises: Receiving real-time pressure data in the servo press balance cylinder system; According to the real-time pressure data and the operating parameters, a second pressure deviation is obtained, and when the second pressure deviation exceeds a second preset value, the balance valve is controlled to perform a pressure fine-tuning compensation operation, so that the pressure in the servo press balance cylinder system is always maintained in a dynamic balance state.

8. A servo press balancing cylinder system characterized by, A control method for a servo press balance cylinder system as claimed in any one of claims 1 to 7, the servo press balance cylinder system comprising: A gas source; A first gas branch connected to the gas source; A balance valve provided in the first gas branch; A plurality of balance cylinders connected to the first gas branch through the balance valve, the balance valve being used to adjust the output gas pressure of the plurality of balance cylinders; A gas pressure detection element provided between the balance valve and the plurality of balance cylinders, the gas pressure detection element being used to detect the pressure value in the first gas branch and the plurality of balance cylinders.

9. The servo press balancing cylinder system of claim 8, wherein, The servo press balance cylinder system further comprises: A first gas tank and a second gas tank connected to the first gas branch, respectively; The plurality of balance cylinders comprises at least one first balance cylinder and at least one second balance cylinder, the at least one first balance cylinder being connected to the first gas tank, the at least one second balance cylinder being connected to the second gas tank, and the number of the first balance cylinders and the second balance cylinders being the same.

10. The servo press balancing cylinder system of claim 9, wherein, The servo press balance cylinder system further comprises: A second gas branch connected to the gas source and in parallel with the first gas branch; Wherein, the second gas branch and the first gas branch are switchably connected between the gas source, the first gas tank and the second gas tank.

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