Electromagnetic hydraulic composite connection forming method and device for pipe plates

Abstract

The invention provides a pipe plate electromagnetic hydraulic composite connection forming method and device, and relates to the technical field of pipe plate connection forming. Comprising the six steps of installation and fixation of a pipe plate, pre-deformation of physical drive extrusion, post-deformation of electromagnetic drive extrusion, parameter acquisition in a deformation stage, intelligent parameter adjustment of physical drive extrusion and electromagnetic drive extrusion and pressure maintenance and cooling. The multi-mode sensor is applied to connection of the pipe and the plate, high-precision connection forming can be achieved through accurately-controlled electromagnetic force and hydraulic pressure, various information in the pipe and plate connection process can be accurately obtained by combining the multi-mode sensor and the double-branch CNN-LSTM network and monitoring key parameters in the deformation process in real time, and therefore the pipe and the plate can be connected more accurately. And sensor data are processed through a deep learning technology, and then various control parameters in the forming process can be continuously optimized and adjusted according to historical data and real-time feedback.

Description

Technical Field

[0001] The present invention relates to the technical field of tube sheet connection and forming, and in particular to a tube sheet electromagnetic and hydraulic composite connection and forming method and device. Background Art

[0002] Tubesheets are common metal parts used in industrial production, widely used in the petrochemical, energy, aerospace, and machinery manufacturing industries. Typically machined from sheet metal, tubesheets carry pressure, conduct heat, and support other structures. In many devices, tubesheets serve as connectors or supports, fulfilling important structural functions.

[0003] In the process of connecting tube and sheet parts, traditional connection methods usually rely on hydraulic or mechanical pressure to achieve the connection of tubes and sheets. Hydraulic extrusion forming, as a common connection technology, uses liquid pressure to compress the ends of tubes and the connecting surfaces of sheets to achieve the connection of joints. However, hydraulic forming methods often have problems such as uneven connection, insufficient connection strength, and low control accuracy. Especially when dealing with complex or high-precision connections, the uneven distribution of hydraulic pressure will cause fluctuations in the shape and strength of the joints. In addition, the hydraulic system is difficult to adjust accurately and respond quickly, which makes it have certain limitations in automation and production efficiency. At the same time, the current connection method has limited application in intelligent control. Most systems can only rely on the operator's experience for adjustment and are difficult to automatically optimize based on real-time data or historical data. This leads to a lot of manual intervention in the production process, and it is impossible to achieve high automation and optimization. Therefore, the present invention proposes a method and device for electromagnetic hydraulic composite connection forming of tube and sheet parts to solve the problems existing in the prior art. Summary of the Invention

[0004] In response to the above problems, the purpose of the present invention is to propose a method and device for electromagnetic-hydraulic composite connection and forming of tube sheet parts. This method and device for electromagnetic-hydraulic composite connection and forming of tube sheet parts can solve the problems existing in the prior art through the composite application of physical driven extrusion and electromagnetic driven extrusion, combined with the efficient feedback mechanism of multimodal sensors and intelligent control systems.

[0005] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a tube sheet electromagnetic hydraulic composite connection forming method, characterized in that it includes the following steps:

[0006] Step 1: Installation and fixation of tube sheet

[0007] In the electromagnetic hydraulic forming die, the end of the pipe to be connected is positioned in the connection area of ​​the perforated plate, so that the end surface of the pipe, the connecting surface of the plate, and the corresponding mold surface together form a sealed connection cavity for accommodating the hydraulic medium. The electromagnetic hydraulic forming die is then closed, and the closing of the electromagnetic hydraulic die is used to apply an initial restraining force to the pipe and the perforated plate.

[0008] Step 2: Physically driven extrusion pre-deformation

[0009] Inject synthetic ester-based hydraulic oil into the sealed connection cavity, then increase the pressure to the initial yield pressure at a rate of 10 to 50 MPa / s, maintain it for 10 to 30 seconds, and then increase the pressure to the preset coordinated pressure for pre-deformation;

[0010] Step 3: Post-deformation of electromagnetically driven extrusion

[0011] After the pressure is increased to the preset coordinated pressure, the electromagnetic pulse is triggered, and the flat coil built into the electromagnetic hydraulic mold releases multi-wave pulse current, which uses the electromagnetic force to couple with the current hydraulic pressure to generate a high-speed shock wave for post-deformation;

[0012] Step 4: Obtaining parameters in the deformation stage

[0013] During steps 2 and 3, a multimodal sensor is arranged in the electromagnetic hydraulic forming die to obtain real-time parameters of the tube-sheet connection process, and deformation characteristic parameters related to the tube-sheet connection are extracted based on the real-time parameters.

[0014] Step 5: Intelligent adjustment of parameters for physical-driven extrusion and electromagnetic-driven extrusion

[0015] A dual-branch CNN-LSTM network is used to construct a parameter intelligent adjustment model and train it. The deformation feature parameters extracted in step 4 are then input into the trained parameter intelligent adjustment model to output physical pressure compensation values ​​and electromagnetic energy correction values. The parameters of physical-driven extrusion and electromagnetic-driven extrusion are then adjusted based on the output results.

[0016] Step 6: Maintaining pressure and cooling

[0017] After the electromagnetic shock, the hydraulic pressure is maintained at 80% to 90% of the peak pressure for 5 to 15 seconds, and then constant temperature coolant is introduced into the electromagnetic hydraulic forming mold to cool it down. After cooling, the hydraulic pressure is released, and finally the mold is opened and taken out to complete the electromagnetic hydraulic composite connection forming of the tube and sheet parts.

[0018] A further improvement is that in step 1, a high-temperature fluororubber sealing ring is embedded in the mold surface.

[0019] A further improvement is that in step 2, the initial yield pressure is 50% to 60% of the yield strength of the pipe, and the preset cooperative pressure is 80% to 90% of the yield strength of the pipe.

[0020] Further improvements are: in step four, the multimodal sensor includes a laser interferometer array, an infrared thermal imager, a pressure sensor, and a thin film strain gauge, and the deformation characteristic parameters include three-dimensional deformation trajectory, pipe wall microstrain, interface temperature field distribution, and hydraulic fluctuations in the sealed connection cavity.

[0021] A further improvement is that in step 4, deformation feature parameters are extracted by using a wavelet transform noise reduction algorithm.

[0022] A further improvement is that in step six, cooling is stopped when the temperature is ≤150°C.

[0023] A further improvement is that in step six, the specific method of releasing the hydraulic pressure is to release the hydraulic pressure at a descending speed of 5 MPa and at intervals of 2 seconds.

[0024] An electromagnetic and hydraulic composite connection and forming device for tube sheet parts, comprising a structural support module for installing and fixing the tube sheet parts, comprising an electromagnetic and hydraulic forming die and a pneumatic clamping device;

[0025] A hydraulic execution module, used for performing physical drive extrusion pre-deformation, which includes a multi-stage pressure control submodule and a medium management submodule;

[0026] An electromagnetic pulse generating module, used for post-deformation of electromagnetic driven extrusion, comprising a pulse power supply submodule, an integrated drive coil submodule and a hardware synchronization trigger submodule;

[0027] A multimodal perception and feedback module, used for monitoring the deformation stage, includes a laser interferometer array submodule, an infrared thermal imager submodule, a pressure sensor submodule, a thin film strain gauge submodule, and a data processing submodule;

[0028] The intelligent collaborative control module is used for intelligent adjustment of parameters of physical drive extrusion and electromagnetic drive extrusion, which includes a parameter optimization submodule, a dynamic timing scheduling submodule, a thermal management control submodule and a safety fuse submodule.

[0029] A further improvement is that an alarm strategy is provided in the safety fuse submodule, and the alarm strategy is divided into two levels, wherein:

[0030] The first level is when the pressure suddenly changes by more than 10%, an alarm message will be issued;

[0031] The second level is when the local temperature rise is greater than 800℃, the electromagnetic pulse is terminated.

[0032] The beneficial effects of the present invention are:

[0033] (1) By combining physical and electromagnetic extrusion and applying them to tube-sheet connections, the present invention achieves highly precise connection formation through precisely controlled electromagnetic force and hydraulic pressure. Compared to conventional single-pressure methods, the present invention effectively avoids uneven or loose connections, ensuring uniformity and robustness during the connection process.

[0034] (2) The present invention combines multimodal sensors with dual-branch CNN-LSTM networks and monitors key parameters in the deformation process in real time, which can accurately obtain various types of information in the tube-sheet connection process. It then processes sensor data through deep learning technology to achieve intelligent parameter adjustment for physical drive extrusion and electromagnetic drive extrusion. It can then continuously optimize and adjust various control parameters in the forming process based on historical data and real-time feedback, thereby improving the automation level of the system. Therefore, through this adaptive optimization intelligent control, the present invention not only improves production efficiency, but also ensures the stability of forming quality, avoiding the quality fluctuation problem caused by information loss or parameter fluctuation in traditional methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the forming method steps of the present invention.

[0036] Figure 2 It is a structural schematic diagram of the forming device of the present invention. DETAILED DESCRIPTION

[0037] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the examples. The examples are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0038] Traditional hydroforming relies solely on hydraulic pressure to complete connections, which makes it perform poorly when dealing with issues such as uneven connections and insufficient joint strength. Hydraulic pressure is difficult to precisely adjust and is significantly affected by the external environment, resulting in fluctuations and poor stability in forming quality. At the same time, it lacks sufficient real-time data monitoring and is unable to adjust forming parameters based on real-time feedback, resulting in unstable quality and low production efficiency. Although some traditional connection forming methods have used sensors for temperature or pressure monitoring, these sensors are mainly used for simple monitoring functions and lack multimodal data acquisition and processing, making it impossible to comprehensively evaluate the quality of the connection process.

[0039] Therefore, according to Figure 1-Figure 2 As shown, this embodiment proposes a tube-sheet electromagnetic-hydraulic composite connection forming method, comprising the following steps:

[0040] Step 1: Installation and fixation of tube sheet

[0041] In the electromagnetic hydraulic forming die, the end of the pipe to be connected is first precisely positioned within the connection area of ​​the perforated plate. At this point, the pipe end surface, the plate connection surface, and the corresponding mold surface together form a sealed connection cavity, which will contain the hydraulic medium. To ensure the stability and sealing effect of the sealed connection cavity during the forming process, a high-temperature fluororubber sealing ring is installed within the mold surface. This high-temperature fluororubber sealing ring is not only heat- and corrosion-resistant, but also maintains excellent sealing performance under high pressure and high temperature environments, effectively preventing hydraulic medium leakage and ensuring stable operation of the hydraulic system. Next, the electromagnetic hydraulic forming die is closed, creating a close contact surface between the mold surface, the pipe, and the perforated plate. The restraining force generated by the mold closing applies an initial restraining force to the pipe and perforated plate. This initial restraining force ensures that the pipe and perforated plate remain fixed in place throughout the connection process. Furthermore, after the mold is closed, an external clamping device secures the pipe and perforated plate to ensure the stability of the connection.

[0042] Step 2: Physically driven extrusion pre-deformation

[0043] Inject synthetic ester-based hydraulic oil into the sealed connection cavity. The viscosity of the hydraulic oil must meet the requirement of ≤3cP to ensure that it has good fluidity during the forming process. The connection cavity is pressurized at a rate of 10 to 50 MPa / s (20 MPa / s in this embodiment) through the hydraulic system (hydraulic execution module). The process of pressurization requires precise rate control to ensure that the pressure can act smoothly on the connection area of ​​the pipe and the perforated plate. After the pressure is increased to the initial yield pressure, it is maintained for 10s to 30s (20s in this embodiment) to cause initial plastic deformation in the connection area of ​​the pipe and the plate to achieve a certain pre-deformation effect. This initial yield pressure is 50% to 60% of the yield strength of the pipe (50% in this embodiment), that is, this pressure value corresponds to the critical point where the pipe material begins to undergo obvious plastic flow;

[0044] After the initial yield pressure is maintained for a period of time, the pressure is continuously increased to a preset cooperative pressure, which is 80% to 90% of the yield strength of the pipe (85% in this embodiment). This pressure increase process not only further intensifies the deformation of the connection area, but also provides a sufficient pre-deformation basis for the subsequent electromagnetically driven extrusion. At this time, the connection area between the pipe and the perforated plate is in a state close to being formed, preparing for the post-deformation of the electromagnetically driven extrusion.

[0045] Step 3: Post-deformation of electromagnetically driven extrusion

[0046] After the pressure is increased to the preset coordinated pressure, the electromagnetic pulse (electromagnetic pulse generating module) is triggered, and the flat coil built into the electromagnetic hydraulic mold releases multiple waves of pulse current. The release of the pulse current will stimulate the electromagnetic force to act on the connection area between the pipe and the perforated plate, generating a strong electromagnetic force, and then use the electromagnetic force to couple with the current hydraulic pressure to generate a high-speed shock wave, which performs secondary extrusion and deformation on the connection area in a short time. The impact force of the electromagnetic drive can quickly make the material flow and further optimize the sealing and firmness of the connection interface, ensuring that the connection part of the tube and sheet achieves the ideal forming effect. In this way, the shock wave of the electromagnetic pulse can achieve precise suppression of the joint area, reduce the gaps or poor contact that may occur during the connection process, and ensure the strength and stability of the connection.

[0047] Step 4: Obtaining parameters in the deformation stage

[0048] During steps 2 and 3, real-time parameters of the tube-sheet connection process are obtained by arranging multimodal sensors in the electromagnetic hydraulic forming die, and extraction is performed based on the real-time parameters. Specifically, deformation feature parameters are extracted by wavelet transform noise reduction algorithm, and then deformation feature parameters related to the tube-sheet connection are obtained. The multimodal sensor includes a laser interferometer array, an infrared thermal imager, a pressure sensor, and a thin film strain gauge.

[0049] The laser interferometer array is used to measure the three-dimensional deformation trajectory of pipes and plates with high precision during the deformation process. It can monitor the tiny displacement of the pipe surface and the connection area in real time to ensure the accuracy of the connection process.

[0050] Infrared thermal imaging cameras are used to obtain the interface temperature field distribution and monitor temperature changes in the connection area. Temperature field monitoring can help analyze the impact of thermal effects on material deformation and ensure that the temperature during the forming process does not exceed the material's tolerance range, thereby avoiding material damage caused by overheating.

[0051] Pressure sensors are used to monitor pressure fluctuations in the hydraulic system and obtain data on hydraulic fluctuations in the sealed connection chamber. This data provides information on hydraulic system stability, helps assess the impact of pressure on connection quality, and ensures that hydraulic pressure is within the optimal range.

[0052] Thin film strain gauges are used to monitor the micro-strain of the pipe wall in the connection area between pipes and plates in real time, so as to accurately grasp the changes in stress distribution during the connection process and promptly detect possible stress concentration points or uneven deformation.

[0053] The locations of the layout are shown in Table 1 below:

[0054] Table 1

[0055]

[0056]

[0057] After acquiring real-time parameters, the raw sensor data is de-noised using a wavelet transform denoising algorithm to extract deformation characteristic parameters related to the tube-sheet connection. The wavelet transform algorithm effectively removes noise from the sensor data while preserving key signal features, ensuring the accuracy and reliability of the deformation characteristic parameters. Ultimately, after data processing, deformation characteristic parameters are obtained, including the three-dimensional deformation trajectory, tube wall microstrain, interface temperature distribution, and hydraulic pressure fluctuations in the sealing connection cavity.

[0058] Step 5: Intelligent adjustment of parameters for physical-driven extrusion and electromagnetic-driven extrusion

[0059] A dual-branch CNN-LSTM network (convolutional neural network and long short-term memory network) was used to construct an intelligent parameter adjustment model to automatically adjust the parameters of both physically driven and electromagnetically driven extrusion. Training was then performed using historical data and real-time deformation characteristic parameters (such as three-dimensional deformation trajectory, pipe wall microstrain, and temperature field distribution) to construct an effective deep learning model. This model combines a convolutional neural network (CNN) with a long short-term memory network (LSTM). By leveraging the CNN's processing of spatial temperature fields and the LSTM's analysis of temporal deformation data, it is able to learn key variations in the connection process in the spatiotemporal domain.

[0060] After the model has been fully trained, the deformation feature parameters extracted in step 4 are input into the trained parameter intelligent adjustment model, and the physical pressure compensation value and electromagnetic energy correction value are output. According to the output compensation and correction values, the control parameters such as the pressure of the hydraulic system, the hydraulic oil flow, the frequency and amplitude of the electromagnetic pulse are adjusted to ensure that the hydraulic and electromagnetic drive systems in the forming process always work in the best state, so as to ensure high-quality forming of the connection area.

[0061] Step 6: Maintaining pressure and cooling

[0062] After the electromagnetic shock, the hydraulic pressure is maintained at 80% to 90% of the peak pressure for 5 to 15 seconds to ensure that the connection is fully compressed under high pressure, thereby improving the joint's strength and sealing. Constant-temperature coolant is then introduced into the electromagnetic hydraulic forming die to cool it down. Cooling is stopped when the temperature reaches ≤150°C to avoid material deformation or stress concentration caused by rapid pressure changes. After cooling, the hydraulic pressure is released at a rate of 5 MPa in 2-second intervals. This gradual pressure release ensures a smooth transition and avoids forming defects or damage caused by sudden pressure drops. Finally, the die is opened and removed, completing the electromagnetic hydraulic composite connection of the tube and sheet.

[0063] An electromagnetic and hydraulic composite connection forming device for tube and sheet parts, such as Figure 2 As shown, it includes a structural support module for installing and fixing the tube sheet, which includes an electromagnetic hydraulic forming die and a pneumatic clamping device. The electromagnetic hydraulic forming die is provided with a coolant circulation channel:

[0064] The electromagnetic hydraulic forming mold is designed to accommodate the connection area between the tube sheet and the perforated plate. A high-temperature fluororubber seal is incorporated into the mold profile to ensure a leak-proof seal for the hydraulic medium. Coolant circulation channels are also designed into the mold profile to control mold temperature, preventing excessive temperatures from affecting the connection and mold life. A pneumatic clamping device precisely grips and secures the tube and perforated plate.

[0065] The hydraulic execution module is used for physical drive extrusion pre-deformation, which includes a multi-level pressure control submodule and a medium management submodule:

[0066] The multi-stage pressure control submodule provides hydraulic pressure as the driving force and has an adjustment function to ensure that the hydraulic pressure is applied to the tube-sheet connection area within a preset range. The medium management submodule is responsible for the storage and supply of hydraulic medium.

[0067] The electromagnetic pulse generation module is used for post-deformation of electromagnetic driven extrusion, which includes a pulse power supply submodule, an integrated drive coil submodule and a hardware synchronization trigger submodule:

[0068] The pulse power submodule provides a stable electromagnetic pulse signal, controlling the current and pulse frequency. The integrated drive coil submodule (flat coil), installed within the mold, releases electromagnetic pulses in the connection area, generating electromagnetic force. The hardware synchronization trigger submodule ensures the synergy between the release of the electromagnetic pulse and the hydraulic pressure, ensuring precise timing and preventing the shock wave from occurring too early or too late.

[0069] The multimodal perception feedback module is used to monitor the deformation stage. It includes a laser interferometer array submodule, an infrared thermal imager submodule, a pressure sensor submodule, a thin film strain gauge submodule, and a data processing submodule:

[0070] The laser interferometer array submodule, infrared thermal imager submodule, pressure sensor submodule, and thin-film strain gauge submodule correspond to the laser interferometer array, infrared thermal imager, pressure sensor, and thin-film strain gauge. The data processing submodule belongs to the edge computing unit (GPU acceleration), which is responsible for running the wavelet transform noise reduction algorithm and outputting the required feature parameters.

[0071] The intelligent collaborative control module is used to intelligently adjust the parameters of physical drive extrusion and electromagnetic drive extrusion. It includes a parameter optimization submodule, a dynamic timing scheduling submodule, a thermal management control submodule, and a safety fuse submodule:

[0072] The parameter optimization submodule is used to implement an intelligent parameter adjustment model and perform corresponding calculations, thereby optimizing the operating parameters of the hydraulic and electromagnetic drive systems based on real-time data. The dynamic timing scheduling submodule is used to coordinate with the hardware synchronization trigger submodule to ensure the synchronization of electromagnetic pulses and hydraulic pressure, and optimize the timing. The thermal management control submodule is used to regulate the temperature within the mold to prevent excessively high or low temperatures from affecting the connection quality.

[0073] Furthermore, the data output by the parameter optimization submodule enters the safety fuse submodule, which has an alarm strategy to monitor abnormal conditions of the equipment and issue an alarm in time. The alarm strategy is divided into two levels:

[0074] The first level is when the pressure suddenly changes by more than 10%, an alarm message will be issued to remind the operator to check whether the pressure of the device is normal;

[0075] The second level is when the local temperature rise is greater than 800°C, the electromagnetic pulse is terminated to avoid equipment damage or process failure due to excessive temperature.

[0076] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the framework and scope of application of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for electromagnetic and hydraulic composite connection and forming of tube sheets, characterized by: The following steps are involved: Step 1: Installation and fixation of tube sheet In the electromagnetic hydraulic forming die, the end of the pipe to be connected is positioned in the connection area of ​​the perforated plate, so that the end surface of the pipe, the connecting surface of the plate, and the corresponding mold surface together form a sealed connection cavity for accommodating the hydraulic medium. The electromagnetic hydraulic forming die is then closed, and the closing of the electromagnetic hydraulic die is used to apply an initial restraining force to the pipe and the perforated plate. Step 2: Physically driven extrusion pre-deformation Inject synthetic ester-based hydraulic oil into the sealed connection cavity, then increase the pressure to the initial yield pressure at a rate of 10 to 50 MPa / s, maintain it for 10 to 30 seconds, and then increase the pressure to the preset coordinated pressure for pre-deformation; Step 3: Post-deformation of electromagnetically driven extrusion After the pressure is increased to the preset coordinated pressure, the electromagnetic pulse is triggered, and the flat coil built into the electromagnetic hydraulic mold releases multi-wave pulse current, which uses the electromagnetic force to couple with the current hydraulic pressure to generate a high-speed shock wave for post-deformation; Step 4: Obtaining parameters in the deformation stage During steps 2 and 3, a multimodal sensor is arranged in the electromagnetic hydraulic forming die to obtain real-time parameters of the tube-sheet connection process, and deformation characteristic parameters related to the tube-sheet connection are extracted based on the real-time parameters. Step 5: Intelligent adjustment of parameters for physical-driven extrusion and electromagnetic-driven extrusion A dual-branch CNN-LSTM network is used to construct a parameter intelligent adjustment model and train it. The deformation feature parameters extracted in step 4 are then input into the trained parameter intelligent adjustment model to output physical pressure compensation values ​​and electromagnetic energy correction values. The parameters of physical-driven extrusion and electromagnetic-driven extrusion are then adjusted based on the output results. Step 6: Maintaining pressure and cooling After the electromagnetic shock, the hydraulic pressure is maintained at 80% to 90% of the peak pressure for 5 to 15 seconds, and then constant temperature coolant is introduced into the electromagnetic hydraulic forming mold to cool it down. After cooling, the hydraulic pressure is released, and finally the mold is opened and taken out to complete the electromagnetic hydraulic composite connection forming of the tube and sheet parts.

2. The electromagnetic-hydraulic composite connection forming method for tube-sheet parts according to claim 1, characterized in that: In the step 1, a high-temperature fluororubber sealing ring is embedded in the mold surface.

3. The electromagnetic-hydraulic composite connection forming method for tube-sheet parts according to claim 1, characterized in that: In the step 2, the initial yield pressure is 50% to 60% of the yield strength of the pipe, and the preset cooperative pressure is 80% to 90% of the yield strength of the pipe.

4. The electromagnetic-hydraulic composite connection forming method for tube-sheet parts according to claim 1, characterized in that: In step 4, the multimodal sensor includes a laser interferometer array, an infrared thermal imager, a pressure sensor, and a thin film strain gauge, and the deformation characteristic parameters include three-dimensional deformation trajectory, pipe wall microstrain, interface temperature field distribution, and hydraulic pressure fluctuation of the sealed connection cavity.

5. The electromagnetic-hydraulic composite connection forming method for tube-sheet parts according to claim 1, characterized in that: In the step 4, deformation feature parameters are extracted by using a wavelet transform noise reduction algorithm.

6. The electromagnetic-hydraulic composite connection forming method for tube-sheet parts according to claim 1, characterized in that: In the step 6, cooling is stopped when the temperature is ≤150°C.

7. The electromagnetic-hydraulic composite connection forming method for tube-sheet parts according to claim 1, characterized in that: In step six, the specific method of releasing the hydraulic pressure is to release the hydraulic pressure at a decreasing speed of 5 MPa and an interval of 2 seconds.

8. An electromagnetic and hydraulic composite connection and forming device for tube and sheet parts, characterized in that: It includes a structural support module for installing and fixing the tube sheet, which includes an electromagnetic hydraulic forming die and a pneumatic clamping device; A hydraulic execution module, used for performing physical drive extrusion pre-deformation, which includes a multi-stage pressure control submodule and a medium management submodule; An electromagnetic pulse generating module, used for post-deformation of electromagnetic driven extrusion, comprising a pulse power supply submodule, an integrated drive coil submodule and a hardware synchronization trigger submodule; A multimodal perception and feedback module, used for monitoring the deformation stage, includes a laser interferometer array submodule, an infrared thermal imager submodule, a pressure sensor submodule, a thin film strain gauge submodule, and a data processing submodule; The intelligent collaborative control module is used for intelligent adjustment of parameters of physical drive extrusion and electromagnetic drive extrusion, which includes a parameter optimization submodule, a dynamic timing scheduling submodule, a thermal management control submodule and a safety fuse submodule.

9. The electromagnetic and hydraulic composite connection and forming device for tube and sheet parts according to claim 8, characterized in that: The safety fuse submodule is provided with an alarm strategy, which is divided into two levels: The first level is when the pressure suddenly changes by more than 10%, an alarm message will be issued; The second level is when the local temperature rise is greater than 800℃, the electromagnetic pulse is terminated.

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