Servo crank press transmission and control system and method thereof

Abstract

The invention relates to the technical field of automatic control, in particular to a servo crank press transmission and control system and method. The system comprises a servo motor, a coupler, a crankshaft, a crank connecting rod and a sliding block. The servo motor directly drives the crankshaft through the coupler, rotation of the crankshaft is converted into linear reciprocating motion of the sliding block, rotation of the crankshaft is controlled by the servo motor, and therefore the position, the movement speed and the accelerated speed of the sliding block are adjusted and controlled, and the stability and the service life of a transmission system are guaranteed. High-precision position control and speed control are realized, and the safety of equipment and personnel is ensured.

Description

Technical Field

[0001] The present invention relates to the field of automation control technology, and in particular to a servo crank press transmission and control system and method thereof, which are suitable for precision stamping processing scenarios of automotive parts and electronic devices. Background Art

[0002] Servo crank press is an important equipment in modern manufacturing industry. The performance of its transmission system is directly related to the production efficiency, stability and control accuracy of the equipment. Existing servo crank presses usually adopt complex gear transmission and reducer systems. However, this system has many disadvantages: low transmission efficiency: due to the complexity of the gear transmission and reducer system, the energy loss is large during the transmission process, resulting in low transmission efficiency, typical efficiency ≤85%, increasing energy consumption cost; limited installation space: the complex transmission system takes up a lot of space, limiting the overall layout and flexibility of the equipment, and the multi-stage gearbox occupies more than 30% of the volume of the whole machine; poor stability: the gear transmission and reducer system are easily affected by wear and failure. The existing system lacks real-time data monitoring, and the sudden failure downtime rate is high; high maintenance cost: the complex system requires frequent maintenance and replacement of parts, which increases the operating cost of the enterprise, and requires regular lubrication and replacement of wear parts. The average annual maintenance cost exceeds 5% of the equipment value.

[0003] In addition, most existing control methods are based on traditional PID control algorithms. However, for servo systems with nonlinear and time-varying characteristics, the PID control algorithm has poor control effect, resulting in fluctuations in control accuracy (above ±0.1mm), making it difficult to ensure the stability and processing accuracy of the press.

[0004] Regarding the patent document CN217346833U, which has been published, a precision servo press, the patent mainly focuses on the structural design of the precision servo press, but its transmission system still uses the traditional reducer and large and small gear structures, resulting in low transmission efficiency and high maintenance costs; the patent document CN208615351U, a new type of multi-link heavy-duty servo press, although this patent uses a multi-link mechanism to improve the load capacity, but its transmission system is still relatively complex, occupies a lot of space, and limits the overall layout and flexibility of the equipment; the patent document CN202410048527.5, a servo press control system System, although the patent proposes a servo press control system, its transmission system design does not mention optimization measures, and there are still problems of energy loss and high manufacturing cost; Patent document CN202320188877.2 A new type of servo press, this patent mainly focuses on the design of limit components and dust collection components, but its transmission system still uses traditional reducer and large and small gear structures, resulting in low transmission efficiency and high maintenance costs. The above patent documents are difficult to achieve high-precision position control and speed control, the functions of the fault diagnosis and protection system are not comprehensive enough, and there is a lack of real-time monitoring of the equipment operating status and automatic protection measures. Summary of the invention

[0005] In view of this, the present invention provides a servo crank press transmission and control system and method thereof, which are used to ensure the stability and service life of the transmission system, achieve high-precision position control and speed control, and ensure the safety of equipment and personnel.

[0006] In the first aspect, the present invention provides a servo crank press transmission and control system, the system comprising: a servo motor, a coupling, a crankshaft, a crank connecting rod and a slider; a high-performance servo motor is selected with the ability of high torque output and precise control; an elastic coupling is used to connect the servo motor shaft and the crankshaft to compensate for slight deviations during installation and operation to ensure smooth transmission; the crankshaft is manufactured using high-strength, high-precision alloy steel and cast steel materials, and the hardness, strength, corrosion resistance and fatigue life of the crankshaft are ensured by combining processing technology and heat treatment, and errors caused by wear and deformation are reduced; the crank connecting rod is manufactured using high-strength materials, and the length and angle accuracy of the crank connecting rod are ensured through precise processing, thereby ensuring the accuracy of the motion trajectory and force transmission of the press; the servo motor directly drives the crankshaft through the coupling, and the rotational motion of the crankshaft is converted into the linear reciprocating motion of the slider. The rotation of the crankshaft is controlled by the servo motor, thereby realizing the regulation of the slider position, movement speed and acceleration.

[0007] In a second aspect, the present invention provides a servo crank press transmission and control method, which is implemented based on the servo crank press transmission and control system described in the first aspect; the method comprises: Step 1: Establish an adaptive prediction model; Step 2: According to the adaptive prediction model, predict the dynamic response of the system and obtain the prediction result; Step 3: Adaptively adjust control parameters according to the prediction results; Step 4: Real-time monitoring and feedback based on the adjusted control parameters.

[0008] Optionally, step 1 includes establishing an adaptive prediction model based on the nonlinear and time-varying characteristics of the servo crank press transmission and control system, and the model can be updated in real time to reflect the current state of the system.

[0009] Optionally, step 2 includes using an adaptive prediction model to predict the dynamic response of the system, including parameters of position, velocity and acceleration.

[0010] Optionally, step 3 includes adaptively adjusting control parameters, including current, voltage and frequency of the servo motor, according to the prediction results to achieve precise control.

[0011] Optionally, step 4 includes real-time monitoring of the operating status of the system, including parameters of position, speed, and pressure, through sensors, and feeding back the operating status to the control system for real-time adjustment of the control strategy.

[0012] Optionally, step 4 further includes fault diagnosis; the fault diagnosis process includes: Step 5: Real-time monitoring of parameters: monitoring the vibration and temperature parameters of the transmission system in real time through sensors, and transmitting the parameters to the system; Step 6: Fault diagnosis: using the diagnostic capability of the adaptive prediction model to analyze and process the parameters monitored in real time, and to promptly discover and locate the fault point; Step 7: Early warning and protective measures: When an abnormal situation is detected, the system can automatically take early warning and protective measures; at the same time, the system can record fault information to provide a reference for subsequent repairs and maintenance.

[0013] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute the servo crank press transmission and control method in the second aspect or any possible implementation of the second aspect.

[0014] In a fourth aspect, an embodiment of the present invention provides an electronic device, comprising: one or more processors; a memory; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the device, enable the device to execute the servo crank press transmission and control method in the second aspect or any possible implementation of the second aspect.

[0015] In the technical solution provided by the present invention, the system includes a servo motor, a coupling, a crankshaft, a crank connecting rod and a slider; a high-performance servo motor is selected, which has the ability of high torque output and precise control; an elastic coupling is used to connect the servo motor shaft and the crankshaft to compensate for slight deviations during installation and operation and ensure smooth transmission; the crankshaft is made of high-strength, high-precision alloy steel and cast steel materials, and the hardness, strength, corrosion resistance and fatigue life of the crankshaft are ensured by combining processing technology and heat treatment, and the errors caused by wear and deformation are reduced; the crank connecting rod is made of high-strength material, and the length and angle accuracy of the crank connecting rod are ensured through precise processing, thereby ensuring the motion trajectory of the press and the accuracy of force transmission; the servo motor directly drives the crankshaft through the coupling, and the rotational motion of the crankshaft is converted into the linear reciprocating motion of the slider. The rotation of the crankshaft is controlled by the servo motor, thereby realizing the regulation of the slider position, movement speed and acceleration. The system ensures the stability and service life of the transmission system, realizes high-precision position control and speed control, and ensures the safety of equipment and personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of a servo crank press transmission and control system provided by an embodiment of the present invention; Figure 2 A simplified structural diagram of a servo crank press transmission and control system provided by an embodiment of the present invention; Figure 3 A schematic diagram of the motion of a servo crank press provided by an embodiment of the present invention; Figure 4 A flow chart of a servo crank press transmission and control method provided by an embodiment of the present invention; Figure 5 A diagram of a fully closed-loop control architecture of a servo crank press provided by an embodiment of the present invention; Figure 6A schematic diagram of an electronic device provided by an embodiment of the present invention.

[0018] Figure numerals: 1-servo motor, 2-coupling, 3-crankshaft, 4-crank connecting rod, 5-slider. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. 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.

[0020] It should be clear that the described embodiments are only 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.

[0021] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention are also intended to include plural forms, unless the context clearly indicates other meanings.

[0022] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0023] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0024] The present invention provides a servo crank press transmission and control system, such as Figure 1 and Figure 2As shown, the system includes: a servo motor 1, a coupling 2, a crankshaft 3, a crank connecting rod 4 and a slider 5; a high-performance servo motor 1 is selected, which has the ability of high torque output and precise control; an elastic coupling 2 is used to connect the servo motor shaft and the crankshaft 3 to compensate for slight deviations during installation and operation and ensure smooth transmission; the crankshaft 3 is made of high-strength and high-precision alloy steel and cast steel materials, and the hardness, strength, corrosion resistance and fatigue life of the crankshaft 3 are ensured by combining processing technology and heat treatment, and the errors caused by wear and deformation are reduced; the crank connecting rod 4 is made of high-strength material, and the length and angle accuracy of the crank connecting rod 4 are ensured by precise processing, thereby ensuring the accuracy of the motion trajectory and force transmission of the press; the servo motor 1 directly drives the crankshaft 3 through the coupling 2, and the rotational motion of the crankshaft 3 is converted into the linear reciprocating motion of the slider 5. The rotation of the crankshaft 3 is controlled by the servo motor 1, thereby realizing the regulation of the position, movement speed and acceleration of the slider 5.

[0025] In the embodiment of the present invention, the servo motor 1 directly drives the crankshaft 3 through the coupling 2, abandoning the traditional complex structure of the reducer and large and small gears, simplifying the transmission structure, reducing energy loss and manufacturing cost. At the same time, the key components such as the crankshaft 3 and the crank connecting rod 4 are manufactured using high-strength and high-precision materials to ensure the stability and service life of the transmission system. Figure 3 As shown in Figure 2, the core of the equation is to convert the rotational motion of the crankshaft into the linear reciprocating motion of the slider, where ω c is the crank speed; s is the slider displacement; θ is the crank angle; β is the angle between the connecting rod and the slider; R is the radius of the crank, and L is the length of the crank connecting rod 4. The rotation of the crankshaft is precisely controlled by the servo motor, thereby achieving precise control of the slider position, movement speed and acceleration.

[0026] Figure 4 A flow chart of a servo crank press transmission and control method provided by an embodiment of the present invention, such as Figure 4 As shown, the method is implemented based on the servo crank press transmission and control system; the method includes: Step 1: Establish an adaptive prediction model.

[0027] In the embodiment of the present invention, step 1 includes establishing an adaptive prediction model according to the nonlinear and time-varying characteristics of the servo crank press transmission and control system, and the model can be updated in real time to reflect the current state of the system.

[0028] Step 2: According to the adaptive prediction model, predict the system dynamic response and obtain the prediction result.

[0029] In the embodiment of the present invention, step 2 includes using an adaptive prediction model to predict the dynamic response of the system, including parameters of position, velocity and acceleration.

[0030] Step 3: Adaptively adjust control parameters based on the prediction results.

[0031] In the embodiment of the present invention, step 3 includes adaptively adjusting the control parameters, including the current, voltage and frequency of the servo motor 1, according to the prediction results, to achieve precise control.

[0032] Step 4: Real-time monitoring and feedback based on the adjusted control parameters.

[0033] In the embodiment of the present invention, step 4 includes real-time monitoring of the operating status of the system through sensors, including parameters of position, speed, and pressure, and feeding back the operating status to the control system for real-time adjustment of the control strategy.

[0034] In the embodiment of the present invention, a closed-loop control system is adopted, such as Figure 5 As shown in the figure, the position, speed and other information are fed back by the sensor in real time to achieve high-precision position control and speed control. Closed-loop control can monitor the deviation of the system in real time and take corresponding corrective measures to ensure the stability and control accuracy of the press.

[0035] In the embodiment of the present invention, first, the nonlinear and time-varying characteristics of the servo press system are modeled using adaptive prediction model control to predict the dynamic response of the system. Then, the control parameters are adaptively adjusted according to the prediction results to achieve precise control. The method can monitor the operating status of the system in real time, warn and handle abnormal situations, and ensure the stability and processing accuracy of the press. A closed-loop control system is adopted to achieve high-precision position control and speed control by using sensors to feedback information such as position, speed and pressure in real time.

[0036] In the embodiment of the present invention, after step 4, fault diagnosis is also included; the process of the fault diagnosis includes: Step 5: Real-time monitoring of parameters: monitoring the vibration and temperature parameters of the transmission system in real time through sensors, and transmitting the parameters to the system; Step 6: Fault diagnosis: using the diagnostic capability of the adaptive prediction model to analyze and process the parameters monitored in real time, and to promptly discover and locate the fault point; Step 7: Early warning and protective measures: When an abnormal situation is detected, the system can automatically take early warning and protective measures; at the same time, the system can record fault information to provide a reference for subsequent repairs and maintenance.

[0037] In the embodiment of the present invention, abnormal situations include but are not limited to shutdowns, alarms, etc. The system can automatically take early warning and protection measures to avoid the expansion of faults and damage to equipment.

[0038] In the embodiment of the present invention, by real-time monitoring of the position, speed, pressure, temperature and other parameters of the transmission system, combined with the diagnostic capability of model prediction, the fault point can be discovered and located in time to avoid the expansion of the fault and damage to the equipment. At the same time, when an abnormal situation is detected, the system can automatically take protective measures, such as shutdown, alarm, etc., to ensure the safety of equipment and personnel.

[0039] Compared with the prior art, the present invention has the following advantages: High transmission efficiency: By optimizing the transmission mechanism design, energy loss is reduced and transmission efficiency is improved. Low maintenance cost: The transmission structure is simplified, the number of wearing parts is reduced, and the maintenance cost of the equipment is reduced. High control accuracy: The use of advanced control algorithms and sensor technology achieves high-precision position control and speed control, and improves processing quality and stability. Strong adaptability: The system can cope with external factors such as load changes and temperature changes and maintain a stable operating state. Good stability: By optimizing the transmission mechanism and control method, the stability of the press is improved and the failure rate is reduced. Safety assurance: The designed fault diagnosis and protection system can monitor the various parameters of the transmission system in real time, and automatically take protective measures such as shutdown and alarm when abnormal conditions are detected, effectively avoiding equipment damage and casualties caused by faults.

[0040] In the technical solution provided by the present invention, the system includes a servo motor, a coupling, a crankshaft, a crank connecting rod and a slider; a high-performance servo motor is selected, which has the ability of high torque output and precise control; an elastic coupling is used to connect the servo motor shaft and the crankshaft to compensate for slight deviations during installation and operation and ensure smooth transmission; the crankshaft is made of high-strength, high-precision alloy steel and cast steel materials, and the hardness, strength, corrosion resistance and fatigue life of the crankshaft are ensured by combining processing technology and heat treatment, and the errors caused by wear and deformation are reduced; the crank connecting rod is made of high-strength material, and the length and angle accuracy of the crank connecting rod are ensured through precise processing, thereby ensuring the motion trajectory of the press and the accuracy of force transmission; the servo motor directly drives the crankshaft through the coupling, and the rotational motion of the crankshaft is converted into the linear reciprocating motion of the slider. The rotation of the crankshaft is controlled by the servo motor, thereby realizing the regulation of the slider position, movement speed and acceleration. The system ensures the stability and service life of the transmission system, realizes high-precision position control and speed control, and ensures the safety of equipment and personnel.

[0041] Each step of the embodiment of the present invention may be performed by an electronic device, which includes but is not limited to a mobile phone, a tablet computer, a portable PC, a desktop computer, etc.

[0042] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored program, wherein when the program is running, the electronic device where the computer-readable storage medium is located is controlled to execute the embodiment of the above-mentioned servo crank press transmission and control method.

[0043] Figure 6 A schematic diagram of an electronic device provided by an embodiment of the present invention, such as Figure 6 As shown, the electronic device 21 includes: a processor 211, a memory 212, and a computer program 213 stored in the memory 212 and executable on the processor 211. When the computer program 213 is executed by the processor 211, the servo crank press transmission and control method in the embodiment is implemented. To avoid repetition, they are not described one by one here.

[0044] The electronic device 21 includes, but is not limited to, a processor 211 and a memory 212. Those skilled in the art will appreciate that Figure 6 It is only an example of the electronic device 21 and does not constitute a limitation of the electronic device 21. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device may also include input and output devices, network access devices, buses, etc.

[0045] The processor 211 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0046] The memory 212 may be an internal storage unit of the electronic device 21, such as a hard disk or memory of the electronic device 21. The memory 212 may also be an external storage device of the electronic device 21, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card (FlashCard), etc. equipped on the electronic device 21. Further, the memory 212 may also include both an internal storage unit of the electronic device 21 and an external storage device. The memory 212 is used to store computer programs and other programs and data required by network devices. The memory 212 may also be used to temporarily store data that has been output or is to be output.

[0047] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A servo crank press transmission and control system, characterized in that: The system comprises: a servo motor (1), a coupling (2), a crankshaft (3), a crank connecting rod (4) and a slider (5); a high-performance servo motor (1) is selected, which has the capability of high torque output and precise control; an elastic coupling (2) is used to connect the servo motor shaft and the crankshaft (3) to compensate for slight deviations during installation and operation and ensure smooth transmission; the crankshaft (3) is made of high-strength and high-precision alloy steel and cast steel materials, and the hardness, strength, corrosion resistance and fatigue life of the crankshaft (3) are ensured by combining processing technology and heat treatment, thereby reducing errors caused by wear and deformation; the crank connecting rod (4) is made of high-strength material, and the length and angle accuracy of the crank connecting rod (4) are ensured by precise processing, thereby ensuring the motion trajectory of the press and the accuracy of force transmission; the servo motor (1) directly drives the crankshaft (3) through the coupling (2), and the rotational motion of the crankshaft (3) is converted into the linear reciprocating motion of the slider (5), and the rotation of the crankshaft (3) is controlled by the servo motor (1), thereby realizing the regulation of the position, motion speed and acceleration of the slider (5).

2. A servo crank press transmission and control method, characterized in that: The method is implemented based on the servo crank press transmission and control system according to claim 1; the method comprises: Step 1: Establish an adaptive prediction model; Step 2: According to the adaptive prediction model, predict the dynamic response of the system and obtain the prediction result; Step 3: Adaptively adjust control parameters according to the prediction results; Step 4: Real-time monitoring and feedback based on the adjusted control parameters.

3. The method according to claim 2, characterized in that The step 1 includes establishing an adaptive prediction model based on the nonlinear and time-varying characteristics of the servo crank press transmission and control system, and the model can be updated in real time to reflect the current state of the system.

4. The method according to claim 2, characterized in that: The step 2 includes using an adaptive prediction model to predict the dynamic response of the system, including parameters of position, velocity and acceleration.

5. The method according to claim 2, characterized in that: The step 3 comprises adaptively adjusting the control parameters, including the current, voltage and frequency of the servo motor (1), according to the prediction results, to achieve precise control.

6. The method according to claim 2, characterized in that The step 4 includes real-time monitoring of the operating status of the system, including parameters of position, speed, and pressure, through sensors, and feeding back the operating status to the control system for real-time adjustment of the control strategy.

7. The method according to claim 2, characterized in that After step 4, fault diagnosis is also included; the process of fault diagnosis includes: Step 5: Real-time monitoring of parameters: monitoring the vibration and temperature parameters of the transmission system in real time through sensors, and transmitting the parameters to the system; Step 6: Fault diagnosis: using the diagnostic capability of the adaptive prediction model to analyze and process the parameters monitored in real time, and to promptly discover and locate the fault point; Step 7: Early warning and protective measures: When an abnormal situation is detected, the system can automatically take early warning and protective measures; at the same time, the system can record fault information to provide a reference for subsequent repairs and maintenance.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is run, the computer-readable storage medium is controlled to execute the servo crank press transmission and control method according to any one of claims 2 to 7.

9. An electronic device, characterized in that: include: one or more processors; Memory; And one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the device, enable the device to execute the servo crank press transmission and control method described in any one of claims 2 to 7.

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