Flash butt welding electro-hydraulic control system and control method

Abstract

The invention discloses a flash butt welding electro-hydraulic control system and method, and the system comprises an upper computer system which is used for setting a flash butt welding process and process parameters; the PLC system is used for controlling the feeding action of the feeding system according to the flash butt welding process and the process parameters; the feeding system is used for realizing speed response and control in the feeding process; the voltage sensor and the current sensor are respectively used for collecting instantaneous voltage and instantaneous current in the welding process; and the energy feedback control module is used for calculating an actual welding energy value according to the voltage and the current, comparing the actual welding energy value with a set initial welding energy value, controlling the speed of a feeding system according to a comparison result, and realizing real-time closed-loop feedback control of energy. According to the application, any process control requirements such as preheating flash butt welding, continuous flash butt welding, pulse flash butt welding and program control depressurization flash butt welding can be met, and real-time closed-loop control of energy can be realized, so that the welding efficiency and the welding joint quality are improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of flash butt welding control, and in particular to a flash butt welding electro-hydraulic control system and a control method. Background Art

[0002] Flash butt welding is an important resistance pressure welding method and is widely used in the connection of metal materials. The basic principle of flash butt welding is to fix the two workpieces to be welded on the welding equipment, turn on the power, and use the feeding mechanism to drive the weldments to gradually approach each other, so that the end faces of the weldments are in partial contact; at the contact point, due to the effect of resistance heat, the metal quickly heats up to the melting point, forming a "flash" phenomenon, and continuously spraying metal droplets. With the steady feeding of the weldment, the entire weld end face is gradually covered by a layer of liquid metal. When the liquid metal layer reaches a certain thickness, the upsetting force is quickly applied to form a bond between the two weldments in the liquid phase, and finally a welded joint is formed through plastic deformation.

[0003] In the prior art, there are limitations in the control system or control method of the existing flash butt welding equipment. On the one hand, the prior art can only implement one of the flash butt welding processes in one welding process, or only uses one of the flash butt welding processes to achieve the welding of the weldment. The advantages of various flash butt welding processes are not comprehensively applied to flash welding, and the requirements of high efficiency, low loss, high welding quality stability and energy saving cannot be met at the same time; on the other hand, the flash butt welding process of the prior art generally controls the welding feed speed through welding current feedback, without considering the stability of the welding voltage, the stability of the welding feed speed and the accuracy and responsiveness of the welding current, so that the energy changes in the welding process cannot be monitored in real time and corresponding adjustments cannot be made, which leads to large energy fluctuations in the welding process and affects the quality of the welded joint. Summary of the invention

[0004] The main purpose of this application is to overcome the shortcomings and deficiencies of the prior art and to provide a flash butt welding electro-hydraulic control system and control method that can simultaneously meet the process control requirements of preheating flash butt welding, continuous flash butt welding, pulse flash butt welding and program-controlled step-down flash butt welding, so as to improve welding efficiency, reduce energy consumption, and meet the requirements of high welding quality stability; at the same time, by real-time monitoring of energy changes during the welding process and making corresponding adjustments, the quality of the welded joint is improved.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a flash butt welding electro-hydraulic control system, the electro-hydraulic control system comprising a host computer system, a PLC system, a feed system, a voltage sensor, a current sensor and an energy feedback control module;

[0007] The host computer system is used to set the flash butt welding process and set the welding process parameters;

[0008] The PLC system is used to control the feeding action of the feeding system according to the flash butt welding process and welding process parameters;

[0009] The feeding system is used to achieve speed response and control of the flash butt welding feeding process;

[0010] The voltage sensor is used to collect the instantaneous voltage value of the welding process;

[0011] The current sensor is used to collect the instantaneous current value of the welding process;

[0012] The energy feedback control module is used to calculate the actual welding energy value according to the instantaneous voltage value and the instantaneous current value, and compare the actual welding energy value with the initial welding energy value set by the host computer system, and control the feed speed of the feed system according to the comparison result of the welding energy value to realize real-time closed-loop feedback control of energy.

[0013] As a preferred technical solution, the flash butt welding process includes preheating flash butt welding, continuous flash butt welding, pulse flash butt welding and program-controlled reduced-voltage flash butt welding;

[0014] The setting of welding process parameters includes setting welding voltage, welding current, feed speed, displacement, burn-off amount, holding time and upsetting time.

[0015] As a preferred technical solution, the feeding system includes a servo valve and a servo cylinder.

[0016] As a preferred technical solution, the feeding action includes alternating forward or backward, continuous feeding, high-frequency response control or alternating voltage control.

[0017] As a preferred technical solution, the feeding speed of the feeding system is controlled according to the comparison result of the welding energy value to realize real-time closed-loop feedback control of energy, including:

[0018] According to the comparison result of the welding energy value, the opening of the servo valve in the feeding system is adjusted by a PID algorithm, thereby controlling the speed of the servo cylinder in the feeding system.

[0019] As a preferred technical solution, the electro-hydraulic control system further includes a welding power supply;

[0020] The welding power supply is used to adjust the voltage of the welded parts according to the set flash butt welding process and the set welding process parameters to control the total power output.

[0021] As a preferred technical solution, the electro-hydraulic control system further includes a position sensor;

[0022] The position sensor is used to collect the position information of the servo cylinder in the feeding system.

[0023] As a preferred technical solution, in the initial stage of flash butt welding, the position information of the two servo cylinders is collected by the position sensor within a preset interval time, and the speed of the servo cylinders in the initial stage is calculated based on the position information of the two servo cylinders and the preset interval time;

[0024] Based on the speed in the initial stage, the speed of the servo cylinder in the feed system is controlled by the PLC system through a PID algorithm.

[0025] In a second aspect, the present application provides a flash butt welding electro-hydraulic control method, which is applied to the above-mentioned flash butt welding electro-hydraulic control system, and comprises the following steps:

[0026] Set up the flash butt welding process and set up the welding process parameters;

[0027] Controlling the feeding action of the feeding system according to the flash butt welding process and welding process parameters;

[0028] When the weldment begins to contact and the welding current is formed, the actual welding energy value is calculated based on the instantaneous voltage value and instantaneous current value during the welding process;

[0029] Comparing the actual welding energy value with the initial welding energy value set by the host computer system;

[0030] The feeding speed of the feeding system is controlled according to the comparison result to realize real-time closed-loop feedback control of energy.

[0031] In a third aspect, the present application provides an electronic device, the electronic device comprising:

[0032] at least one processor; and a memory communicatively coupled to the at least one processor;

[0033] The memory stores computer program instructions that can be executed by the at least one processor, and the computer program instructions are executed by the at least one processor so that the at least one processor can execute the flash butt welding electro-hydraulic control method.

[0034] In summary, compared with the prior art, the effective effects brought about by the technical solution provided by this application include at least:

[0035] The present application proposes a flash butt welding electro-hydraulic control system, which can flexibly set the welding process and its welding parameters through the host computer system, realize the comprehensive application of various flash butt welding processes such as preheating flash butt welding, continuous flash butt welding, pulse flash butt welding and program-controlled step-down flash butt welding, so that the system can select or combine the optimal welding process according to specific welding requirements and material characteristics, thereby significantly improving welding efficiency, reducing consumption, and meeting the diverse requirements of high welding quality stability and energy saving; at the same time, the instantaneous voltage value and instantaneous current value in the welding process are collected in real time by voltage sensors and current sensors, and the actual welding energy value is calculated by the energy feedback control module, and then compared with the initial welding energy value set by the host computer system, the system can accurately adjust the speed of the feed system to realize real-time closed-loop feedback control of energy; not only improves the stability and control accuracy of the welding energy, but also effectively avoids welding defects caused by energy fluctuations, such as cracks, oxide films, slag inclusions and shrinkage cavities, thereby improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A composition diagram of a flash butt welding electro-hydraulic control system provided in one embodiment of the present application;

[0038] Figure 2 A flow chart of an electro-hydraulic control method for flash butt welding provided in one embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0040] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0041] Example:

[0042] See also Figure 1 , in one embodiment of the present application, a flash butt welding electro-hydraulic control system is provided, the electro-hydraulic control system comprising a host computer system, a PLC system, a feeding system, a voltage sensor, a current sensor and an energy feedback control module;

[0043] The host computer system is used to set the flash butt welding process and set the welding process parameters;

[0044] The PLC system is used to control the feeding action of the feeding system according to the flash butt welding process and welding process parameters;

[0045] The feeding system is used to achieve speed response and control of the flash butt welding feeding process;

[0046] The voltage sensor is used to collect the instantaneous voltage value of the welding process;

[0047] The current sensor is used to collect the instantaneous current value of the welding process;

[0048] The energy feedback control module is used to calculate the actual welding energy value according to the instantaneous voltage value and the instantaneous current value, and compare the actual welding energy value with the initial welding energy value set by the host computer system, and control the feed speed of the feed system according to the comparison result of the welding energy value to realize real-time closed-loop feedback control of energy.

[0049] The flash butt welding in this embodiment is an efficient solid phase welding method, which can obtain a high-quality weld in one step. Compared with other welding technologies, its advantages are mainly reflected in:

[0050] (1) It is solid phase welding, there is no molten pool, no need to add deposited metal, and the weld composition is the same as the base material;

[0051] (2) High degree of automation, short welding cycle and high efficiency, independent of welder skills, and stable welding quality;

[0052] (3) There is no need for precise processing of the end of the weldment before welding. The cross-sectional shape of the workpiece is formed in one step. No welding materials and gas protection are required, which reduces the welding cost and is suitable for welding (special-shaped) large-section workpieces.

[0053] (4) There are no defects such as slag inclusions and pores, the residual stress is small, the strength is close to the parent material, and high-quality welds can be obtained. Flash welding has been widely used in rail transportation, automobiles, bridges, construction, steel, oil and gas transportation and other fields.

[0054] As one of the embodiments, the flash butt welding process includes preheating flash butt welding, continuous flash butt welding, pulse flash butt welding and program-controlled step-down flash butt welding; setting the welding process parameters includes setting the welding voltage, welding current, feed speed, displacement, burn-off amount, holding time and top forging time, etc.

[0055] Among them, the preheating flash welding process can weld 5000~10000mm 2 Large ferrous metal parts; continuous flash butt welding process is mainly used for end faces 1000mm 2 The joints of left and right closed parts, such as rims, aluminum windows, etc.; the pulse flash butt welding process can weld 100,000mm 2 For large-section oil and gas pipelines, the thermal efficiency is increased by more than 1 times, and the top forging allowance is shortened by 2 / 3 to 1 / 2. The program-controlled step-down flash butt welding process adopts the high-pressure-low-pressure-high-pressure method during the welding process, which has the advantages of uniform heating and short welding time.

[0056] In this embodiment, the host computer system is also used to implement functions such as system monitoring (alarm information, device status and sensor data, etc.), data management (data storage and call, etc.), etc.

[0057] Furthermore, in the PLC system of this embodiment, PLC refers to a programmable logic controller; the PLC system of this embodiment is composed of a Siemens S7 1500 high-performance PLC and related modules; in addition to controlling the feeding action of the feeding system according to the flash butt welding process and welding process parameters, the PLC system can also be used to control the action of the entire equipment, collect equipment signals and collect sensor signals.

[0058] As one of the implementation modes, the feeding system includes a high-frequency response servo valve and a high-frequency vibration servo cylinder to achieve high speed response and high-precision control of the flash butt welding feeding process.

[0059] The servo valve is an electro-hydraulic conversion element that can convert electrical signals into hydraulic signals to control the pressure, flow and direction of the hydraulic system. The servo cylinder is a hydraulic actuator. In this application, the distance between the two workpieces is controlled by the feed (including forward and backward) of the servo cylinder to control the welding current and realize flash process welding.

[0060] Therefore, the PLC system adjusts the flow of the feed system according to the flash butt welding process and process parameters by controlling the opening of the high-frequency response servo valve, thereby realizing the feed speed of the servo cylinder.

[0061] The feeding action of the servo cylinder is to perform corresponding feeding actions according to the flash welding process set in the upper computer system; wherein, the feeding action includes alternating forward or backward (preheating flash process), continuous feeding (continuous flash process), high frequency response control (pulse flash process) or high voltage-low voltage-high voltage alternating voltage control (programmed voltage reduction process), etc.

[0062] The flash welding process generally includes flash flat, continuous flash (pulse flash), accelerated burning and rapid upsetting. The electro-hydraulic control system of the present application is based on a feed system composed of a high-frequency response servo valve and a high-frequency vibration servo cylinder, and through a high-performance PLC system, the maximum response time of the feed system is 1ms, and the maximum vibration frequency of the cylinder is 50Hz, which far meets the requirements of the pulse flash welding process; and through the control of the servo valve by the PLC program in the PLC system, the feed system can realize rapid alternating forward and backward (preheating flash), continuous feeding (continuous flash), high-frequency response control (pulse flash), and high-low-high voltage alternating voltage control (program-controlled step-down).

[0063] In addition, different flash butt welding process composite controls can be selected according to welding materials, power distribution conditions, welding head requirements, etc. For example, on the basis of continuous flash, a preheating flash process is added before welding to improve preheating efficiency and achieve rapid heating; program-controlled voltage reduction control is added in the flash flattening stage to achieve rapid flash flattening; before accelerating the burning, a pulse flash welding process or a pulse continuous flash welding alternating process control is adopted, which can significantly save electric energy, reduce material loss (burning amount), and realize the function of welding large-section weldments with a small power supply. And based on the electro-hydraulic control system with large flow and high pressure, the requirements of the fast upsetting process for the upsetting speed and upsetting pressure can be realized, and the welding oxide can be quickly and effectively extruded, greatly reducing the upsetting amount. Therefore, the present application is based on the electro-hydraulic control system with high frequency response and large flow and high pressure, and the control of the composite flash butt welding process of the flash butt welding process is more efficient, more energy-saving, less burning amount and upsetting amount (reducing welding material loss), the welding process is more controllable, and the quality of the welded joint is more stable.

[0064] As one implementation method, the feeding speed of the feeding system is controlled according to the comparison result of the welding energy value to realize the real-time closed-loop feedback control of energy, which specifically includes:

[0065] According to the comparison result of the welding energy value, the opening of the high-frequency response servo valve in the feeding system is adjusted by a PID algorithm, thereby controlling the speed of the high-frequency vibration servo cylinder in the feeding system.

[0066] As one embodiment, the electro-hydraulic control system further includes a welding power source;

[0067] The welding power supply is used to adjust the voltage of the welded parts according to the set flash butt welding process and the set welding process parameters to control the total power output.

[0068] As one implementation method, the electro-hydraulic control system further includes a position sensor;

[0069] The position sensor is used to collect position information of a high-frequency vibrating servo cylinder in a feed system.

[0070] Specifically, in the initial stage of flash butt welding, that is, before the weldments are in contact and the welding current is formed, the position information of the two high-frequency vibration servo cylinders is collected by the position sensor within a preset interval time, and the speed of the high-frequency vibration servo cylinders in the initial stage is calculated based on the position information of the two high-frequency vibration servo cylinders and the preset interval time; for example: the preset interval time is 10ms, and the position information C1 and C2 of the two servo cylinders are collected respectively within 10ms, and the two position information are collected successively in time sequence; then the speed V of the high-frequency vibration servo cylinder in the initial stage can be obtained by subtracting the previous position information from the latter time-sequenced position information and dividing it by the preset interval time, that is, V=(C2-C1) / T.

[0071] Based on the speed in the initial stage, the speed of the servo cylinder in the feeding system is controlled by the PID algorithm and the PLC system, that is, the servo valve adjusts the opening according to the control signal (the output of the control quantity calculated by PID), thereby changing the feeding speed of the servo cylinder. In this way, closed-loop high-precision control of the feeding speed in the initial stage of flash butt welding can be achieved. Among them, PID is a commonly used closed-loop controller that aims to calculate the control quantity based on the deviation between the target value (set value) and the actual value (feedback value).

[0072] The position sensor and voltage and current sensor in the electro-hydraulic control system of the present application provide two kinds of information, position feedback and energy feedback, respectively. Both kinds of information can be used to control the opening of the servo valve, and then control the feed speed of the servo cylinder; different control strategies can be selected according to actual needs. In this embodiment, in the initial stage of flash butt welding, that is, before the weldment is in contact and the welding current is not formed, the position information provided by the position sensor is used to adjust the opening of the servo valve to control the feed speed of the servo cylinder. When the weldment begins to contact and the welding current is formed, the actual welding energy value calculated according to the instantaneous current and voltage is compared with the initial energy value set by the host computer, and the opening of the servo valve is adjusted according to the comparison result to control the feed speed of the servo cylinder; in addition, in some complex or special welding processes, it is necessary to use position feedback and energy feedback to control the servo valve at the same time. At this time, the electro-hydraulic control system will monitor these two feedback information at the same time, and select the corresponding control strategy according to which parameter reaches its set value first.

[0073] This application also provides a flash butt welding electro-hydraulic control method, see Figure 2 , comprising the following steps:

[0074] S1. Setting the flash butt welding process and welding process parameters;

[0075] S2. Controlling the feeding action of the feeding system according to the flash butt welding process and welding process parameters;

[0076] S3. When the weldment begins to contact and the welding current is formed, the actual welding energy value is calculated according to the instantaneous voltage value and instantaneous current value during the welding process;

[0077] S4, comparing the actual welding energy value with the initial welding energy value set by the host computer system;

[0078] S5. Controlling the feeding speed of the feeding system according to the comparison result to achieve real-time closed-loop feedback control of energy.

[0079] In summary, the present application provides a flash butt welding electro-hydraulic control system and control method, which simultaneously meets the process control requirements of preheating flash butt welding, continuous flash butt welding, pulse flash butt welding and program-controlled step-down flash butt welding, and has higher control accuracy and high-frequency response speed, as well as composite control of any flash butt welding process, to provide a suitable flash butt welding composite control process for welds with different welding materials and process requirements, and to provide a solution for flash butt welding of more efficient welding, more energy-saving methods, less consumables and more stable welding joints. In addition, the present application realizes high-precision speed control based on high-performance PLC and high-response feeding system on the one hand, and adopts energy (the product of welding current and voltage) feedback control on the other hand to reduce the influence of welding voltage fluctuation and feed speed accuracy and mutation, so as to obtain better welding joint quality.

[0080] It should be noted that, for the sake of convenience of description, the aforementioned method embodiments are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited to the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously.

[0081] In another embodiment, an electronic device for implementing an electro-hydraulic control method for flash butt welding is provided, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor; when the processor executes the computer program, an electro-hydraulic control method for flash butt welding of any embodiment of the present application is implemented.

[0082] Exemplarily, in this embodiment, the computer program may be divided into one or more modules, which are stored in the memory and executed by the processor to complete the present application. The one or more module elements may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program in the device.

[0083] The electronic device may be a computing device such as a desktop computer, a notebook, a palm computer, a cloud server, etc. The device may include, but is not limited to, a processor and a memory.

[0084] The processor 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. The processor is the control center of the device, and various interfaces and lines are used to connect various parts of the entire device.

[0085] The memory can be used to store the computer program and / or module, and the processor realizes various functions of the device by running or executing the computer program and / or module stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required for a function, etc.; in addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0086] Accordingly, the present application also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute a flash butt welding electro-hydraulic control method as described in any one of the above embodiments.

[0087] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0088] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above embodiments are preferred implementation modes of the present application, but the implementation modes of the present application are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present application should be equivalent replacement methods and are included in the protection scope of the present application.

Claims

1. A flash butt welding electro-hydraulic control system, characterized in that: The electro-hydraulic control system includes a host computer system, a PLC system, a feeding system, a voltage sensor, a current sensor and an energy feedback control module; The host computer system is used to set the flash butt welding process and set the welding process parameters; The PLC system is used to control the feeding action of the feeding system according to the flash butt welding process and welding process parameters; The feeding system is used to achieve speed response and control of the flash butt welding feeding process; The voltage sensor is used to collect the instantaneous voltage value of the welding process; The current sensor is used to collect the instantaneous current value of the welding process; The energy feedback control module is used to calculate the actual welding energy value according to the instantaneous voltage value and the instantaneous current value, and compare the actual welding energy value with the initial welding energy value set by the host computer system, and control the feed speed of the feed system according to the comparison result of the welding energy value to realize real-time closed-loop feedback control of energy.

2. A flash butt welding electro-hydraulic control system according to claim 1, characterized in that: The flash butt welding process includes preheating flash butt welding, continuous flash butt welding, pulse flash butt welding and program-controlled reduced-voltage flash butt welding; The setting of welding process parameters includes setting welding voltage, welding current, feed speed, displacement, burn-off amount, holding time and upsetting time.

3. A flash butt welding electro-hydraulic control system according to claim 1, characterized in that: The feeding system comprises a servo valve and a servo cylinder.

4. A flash butt welding electro-hydraulic control system according to claim 1, characterized in that: The feeding action includes alternating forward or backward, continuous feeding, high frequency response control or alternating voltage control.

5. A flash butt welding electro-hydraulic control system according to claim 3, characterized in that: The method of controlling the feeding speed of the feeding system according to the comparison result of the welding energy value to realize the real-time closed-loop feedback control of energy includes: According to the comparison result of the welding energy value, the opening of the servo valve in the feeding system is adjusted by a PID algorithm, thereby controlling the speed of the servo cylinder in the feeding system.

6. A flash butt welding electro-hydraulic control system according to claim 1, characterized in that: The electro-hydraulic control system also includes a welding power source; The welding power supply is used to adjust the voltage of the welded parts according to the set flash butt welding process and the set welding process parameters to control the total power output.

7. A flash butt welding electro-hydraulic control system according to claim 3, characterized in that: The electro-hydraulic control system further includes a position sensor; The position sensor is used to collect the position information of the servo cylinder in the feeding system.

8. A flash butt welding electro-hydraulic control system according to claim 7, characterized in that: In the initial stage of flash butt welding, the position information of the two servo cylinders is collected by the position sensor within a preset interval time, and the speed of the servo cylinders in the initial stage is calculated according to the position information of the two servo cylinders and the preset interval time; Based on the speed in the initial stage, the speed of the servo cylinder in the feed system is controlled by the PLC system through a PID algorithm.

9. A flash butt welding electro-hydraulic control method, characterized in that: The steps include: Set up the flash butt welding process and set up the welding process parameters; Controlling the feeding action of the feeding system according to the flash butt welding process and welding process parameters; When the weldment begins to contact and the welding current is formed, the actual welding energy value is calculated based on the instantaneous voltage value and instantaneous current value during the welding process; Comparing the actual welding energy value with the initial welding energy value set by the host computer system; The feeding speed of the feeding system is controlled according to the comparison result to realize real-time closed-loop feedback control of energy.

10. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively coupled to the at least one processor; Wherein, the memory stores computer program instructions that can be executed by the at least one processor, and the computer program instructions are executed by the at least one processor so that the at least one processor can execute the flash butt welding electro-hydraulic control method as described in claim 9.

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