Electromagnetic auxiliary hydraulic bending forming die and method for pipe plate

Abstract

The invention provides an electromagnetic auxiliary hydraulic bending forming die and method for a pipe plate, and relates to the technical field of pipe plate bending forming. The electromagnetic auxiliary hydraulic bending forming die comprises a base, a lower die plate, a middle die and an upper die are sequentially arranged above the base, a bottom cabinet is installed below the base, and a power source is installed on the inner side of the bottom cabinet; the interior of the bottom cabinet is connected with a lower die plate through a first hydraulic driving assembly, a driving plate is installed on the lower die plate, an electromagnetic coil is installed on the driving plate, the base is connected with a middle die through a supporting assembly, a hydraulic cavity is formed in the inner side of the middle die, a punch is arranged above the driving plate, and a conductive core is embedded in the punch. The upper end of the punch extends to the hydraulic cavity and makes contact with the middle die through a sealing ring. A hydraulic driving mode and an electromagnetic pulse driving mode are combined, a hydraulic system is used for providing preliminary pre-deformation pressure, an electromagnetic pulse driving system is used for providing accurate post-deformation force, and therefore uniform pressure distribution in the bending process is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tube plate bending forming, in particular to a tube plate electromagnetic auxiliary hydraulic bending forming die and method. BACKGROUND

[0002] Tube plate is a common metal workpiece in industrial production, widely used in petrochemical, energy, aerospace, mechanical manufacturing and other fields. Tube plate is usually made of metal sheet, and has the functions of bearing pressure, conducting heat or supporting other structures. In many devices, tube plate serves as a connecting component or a support, and plays an important structural role. Since tube plate requires good sealing, strength and rigidity in many applications, the design of many tube plates needs to be bent in shape. Bending forming can change the structural shape of tube plate according to design requirements to meet the assembly needs of different devices or structures. Through bending forming, tube plate can better match other components, avoid problems during connection or installation, and also improve its compression strength and stress resistance, ensuring the reliability and safety of the device.

[0003] The process of tube plate bending forming is usually affected by the following factors: the material of tube plate is usually metal, especially stainless steel, aluminum alloy, carbon steel, etc., which have different physical properties, and are prone to uneven material internal stress and springback during bending forming. Or in the bending process, different parts of the tube plate are subjected to different degrees of tensile and compressive stress, which may cause material yield or uneven deformation.

[0004] Therefore, the traditional tube plate bending forming method mostly relies on mechanical bending machine or hydraulic bending machine. The precision of these devices is often limited by the rigidity of the mechanical system and the experience of the operator, and at the same time, long time is needed for mold adjustment and workpiece positioning, the processing cycle is long, and the production efficiency is low. Especially when dealing with complex shaped tube plate, it often needs multiple steps to complete a forming, resulting in long idle time of the equipment and low resource utilization, therefore the present application proposes a tube plate electromagnetic auxiliary hydraulic bending forming die and method to solve the problems existing in the prior art. SUMMARY

[0005] In view of the above problems, the purpose of the present application is to propose a tube plate electromagnetic auxiliary hydraulic bending forming die and method, which combines hydraulic drive and electromagnetic pulse drive to ensure uniform pressure distribution during bending, and solves the problems existing in the prior art.

[0006] In order to achieve the purpose of the present application, the present application realizes the technical scheme: a tube plate piece electromagnetic auxiliary hydraulic bending forming die and method, including base, the upper of base is equipped with lower die plate, middle die and upper die in turn, the lower of base is installed with bottom cabinet, and the inside of bottom cabinet is installed with power supply, the inside of bottom cabinet is connected with lower die plate through first hydraulic drive assembly, the upper of lower die plate is installed with drive plate, and the upper of drive plate is installed with electromagnetic coil, the upper of base is connected with middle die through support assembly, the inside of middle die is equipped with hydraulic chamber, the upper of drive plate is equipped with punch, and the inside of punch is embedded with conductive core, the upper end of punch extends to hydraulic chamber, and is contacted with middle die through sealing ring, the upper end of middle die is equipped with tube plate piece placing groove, and tube plate piece placing groove is communicated with hydraulic chamber, the inside of middle die is equipped with plate piece lifting assembly, the upper of base is connected with upper die through second hydraulic drive assembly, the inside of upper die is equipped with bending forming groove, and bending forming groove is communicated with tube plate piece placing groove.

[0007] Further improvement lies in that: the inside of middle die is equipped with inner die, and the inner cavity of inner die corresponds to hydraulic chamber, the inner die is fixedly connected with middle die through bolts, both sides in middle die are installed with heat conduction plates, and the heat conduction plates are contacted with inner die, the inside of heat conduction plate is equipped with U-shaped coil pipe, both ends of U-shaped coil pipe pass through middle die, and are installed with pipe connectors.

[0008] Further improvement lies in that: the support assembly includes two groups of support plates arranged in symmetry, the support plates are installed with extension seats, and the extension seats are fixedly connected with middle die through bolts, and the place where the extension seats are contacted with middle die is designed in L shape.

[0009] Further improvement lies in that: the second hydraulic drive assembly includes fixed piles, the fixed piles are evenly provided with four groups, and the fixed piles are fixedly connected with support plates, the inside of two groups of fixed piles is installed with first electric hydraulic push rods, and the telescopic ends of first electric hydraulic push rods are connected with upper die, the inside of other two groups of fixed piles is installed with guide spring telescopic pieces, and the telescopic ends of guide spring telescopic pieces are connected with upper die.

[0010] Further improvement lies in that: the first hydraulic drive assembly includes second electric hydraulic push rod, the second electric hydraulic push rod is connected with base through support, and the telescopic end of second electric hydraulic push rod is connected with lower die plate, the lower end of lower die plate is installed with guide column, and the guide column is evenly provided with several groups, and the lower end of guide column passes through base.

[0011] Further improvement lies in that: the plate piece lifting assembly includes two groups of mounting cavities arranged in symmetry, the mounting cavities are communicated with tube plate piece placing groove, and the inside of mounting cavities is installed with material lifting spring telescopic pieces, and the upper end of material lifting spring telescopic pieces is installed with contact block.

[0012] Further improvement lies in that the lower end of the punch is provided with a disc part, and the outer side of the punch is sleeved with a reset spring, both ends of the reset spring are connected with the middle die and the disc part respectively.

[0013] A forming method of a tube plate piece electromagnetic auxiliary hydraulic bending forming die, comprising the following steps:

[0014] S1: start the second hydraulic drive assembly to drive the upper die to move upward to open the die;

[0015] S2: after the die is opened, the operator puts the tube plate piece to be bent into the bending forming groove, and then starts the second hydraulic drive assembly to close the die;

[0016] S3: stop the first hydraulic drive assembly, start the first hydraulic drive assembly to drive the lower die to move upward, so that the liquid in the hydraulic chamber is first driven to contact the tube plate piece to perform pre-deformation;

[0017] S4: start the power supply to energize the electromagnetic coil, the punch generates eddy current to generate a pulse magnetic field, and the punch is driven by the pulse magnetic field to move upward at high speed to perform bending forming.

[0018] The beneficial effects of the present application are:

[0019] (1) the present application combines hydraulic drive mode and electromagnetic pulse drive mode, the hydraulic system is used to provide preliminary pre-deformation pressure, and the electromagnetic pulse drive system provides accurate post-deformation force, so that uniform pressure distribution in the bending process is ensured, and the problem of low precision in traditional hydraulic bending is effectively solved.

[0020] (2) the present application adopts a detachable design, when a certain part fails, the corresponding part can be replaced conveniently without replacing the whole, and the whole is quickly closed, formed and opened by mechanical drive, and the high efficiency of electromagnetic pulse drive significantly shortens the forming cycle and improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a front view structural schematic diagram of the closed die of the present application.

[0022] Figure 2 is a local enlarged schematic diagram of A of the present application.

[0023] Figure 3 is a top view schematic diagram of the middle die of the present application.

[0024] Figure 4 is a front view structural schematic diagram of the open die of the present application.

[0025] Figure 5is a front view schematic diagram of the present application.

[0026] 1, base; 2, lower die plate; 3, middle die; 4, upper die; 5, bottom cabinet; 6, drive plate; 7, hydraulic chamber; 8, punch; 9, tube plate piece placing groove; 10, bending forming groove; 11, inner die; 12, heat conduction plate; 13, U-shaped coil pipe; 14, pipe connector; 15, support plate; 16, extension base; 17, fixed pile; 18, first electric hydraulic push rod; 19, guide spring telescopic piece; 20, second electric hydraulic push rod; 21, guide column; 22, mounting cavity; 23, material lifting spring telescopic piece; 24, contact block; 25, return spring; 26, supplementary liquid pipe. DETAILED DESCRIPTION

[0027] In order to deepen the understanding of the present application, the present application will be further described below in conjunction with examples, which are only used to explain the present application and do not constitute a limitation on the protection scope of the present application.

[0028] There are still the following problems in the prior art:

[0029] (1) In the operation process of the traditional bending forming method, especially in the deformation zone, scratches or local material damage may occur on the surface of the tube plate piece. These surface defects not only affect the appearance of the tube plate piece, but also may affect its mechanical properties. The friction and pressure concentration in the bending process may cause damage to the metal surface, reducing the service life of the tube plate piece.

[0030] (2) In the traditional hydraulic bending process, due to uneven stress of the hydraulic system and the die, the tube plate piece is prone to springback and deformation after bending, especially for thinner metal materials, the deformation is more serious. This leads to poor precision of the workpiece, which needs to be finished through subsequent finishing process to meet the final requirements, thereby increasing the production cycle and cost.

[0031] Therefore, according to Figures 1-5 As shown in the figure, the present embodiment proposes a tube plate piece electromagnetic auxiliary hydraulic bending forming die, which comprises a base 1, and a lower die plate 2, a middle die 3 and an upper die 4 are sequentially arranged above the base 1, a bottom cabinet 5 is installed below the base 1, and a power supply is installed on the inner side of the bottom cabinet 5.

[0032] The first hydraulic drive assembly is connected with the lower die plate 2 in the cabinet 5, and the first hydraulic drive assembly comprises a second electric hydraulic push rod 20, the second electric hydraulic push rod 20 is connected with the base 1 through a support, and the telescopic end of the second electric hydraulic push rod 20 is connected with the lower die plate 2. The lower end of the lower die plate 2 is provided with a guide column 21, and the guide column 21 is uniformly provided with a plurality of groups. In this embodiment, the guide column 21 is uniformly provided with four groups, and the lower end of the guide column 21 penetrates through the base 1. Thus, in operation, the second electric hydraulic push rod 20 is started to drive the lower die plate 2 to move upward, and the cooperation of the guide column 21 and the base 1 (which penetrates through the base 1 and is in contact with the base 1) ensures the stability of the lower die plate 2 during movement.

[0033] The driving plate 6 is installed on the lower die plate 2, and the electromagnetic coil is installed on the driving plate 6. The electromagnetic coil is located at the lowermost position of the punch 8, and the electromagnetic coil is connected with the power supply through a cable. In operation, the electromagnetic coil forms a circuit with the power supply, generates an electromagnetic field after being powered on, that is, a strong electromagnetic field is generated by the current passing through the electromagnetic coil, and the electromagnetic force drives the punch 8 to move upward. The movement of the punch 8 will apply the liquid in the hydraulic chamber 7 to the placed tube plate to accurately bend and deform, thereby completing the bending forming stage in the forming process.

[0034] Further, in the working process, the current size can be adjusted by the power supply (controlled by the general controller) to accurately control the electromagnetic force generated by the electromagnetic coil. The strength of the current determines the size of the electromagnetic pulse, thereby affecting the strength and speed of the punch 8 pushing the workpiece. By accurately controlling the strength of the electromagnetic pulse, the workpiece can be ensured to obtain accurate post-deformation force, and excessive deformation or inaccurate shape can be avoided.

[0035] The base 1 is connected with the middle die 3 through a support assembly, and the support assembly comprises two groups of support plates 15 arranged in symmetry. The support plates 15 are perpendicular to the base 1 and are fixedly connected with the base 1. The extension seat 16 is installed on the support plate 15, the extension seat 16 is horizontally arranged, and the extension seat 16 is fixedly connected with the middle die 3 through bolts. Meanwhile, the place where the extension seat 16 contacts with the middle die 3 is designed in an L shape, so that the extension seat 16 can better fit the middle die 3, and the L-shaped design can increase the contact area of the extension seat 16 and the middle die 3, thereby ensuring the close cooperation of the two. The support plate 15 is used to stably connect the middle die 3 to the base 1, and provides a detachable mode, that is, the extension seat 16 is connected with the middle die 3 by bolts, thereby facilitating disassembly.

[0036] The inner side of the middle mold 3 is provided with a hydraulic chamber 7, and further, the inner side of the middle mold 3 is provided with an inner mold 11, and the inner cavity of the inner mold 11 corresponds to the hydraulic chamber 7, that is, the inner cavity of the inner mold 11 is the hydraulic chamber 7, and the hydraulic chamber 7 is provided with liquid. Correspondingly, the upper end of the inner mold 11 is flush with the bottom of the tube plate piece placing groove 9. Further, one side of the inner mold 11 is provided with a liquid supplementing pipe 26 which penetrates through the middle mold 3 and is provided with a valve. Through the liquid pipe, the operator can adjust the amount and pressure of the liquid in the hydraulic chamber 7 according to the needs, to ensure the sufficiency of the liquid and the stability of the pressure.

[0037] A monitoring liquid pipe (not shown in the figure) is installed on the other side of the inner mold 11, which penetrates through the middle mold 3 and is provided with a digital pressure gauge (not shown in the figure), to ensure that the liquid pressure meets the requirements of the forming process, and to avoid the influence of excessive or insufficient pressure on the forming precision.

[0038] The inner mold 11 is fixedly connected with the middle mold 3 by bolts, and heat conducting plates 12 are installed on both sides in the middle mold 3, and the heat conducting plates 12 are in contact with the inner mold 11. The inner side of the heat conducting plate 12 is provided with a U-shaped coil pipe 13, and both ends of the U-shaped coil pipe 13 penetrate through the middle mold 3 and are provided with pipe connectors 14. When the mold is used, the U-shaped coil pipe 13 needs to be connected with the external circulating liquid supply equipment, and correspondingly, the inner mold 11 is integrated with a temperature sensor. Therefore, through the cooperation of the U-shaped coil pipe 13 and the external circulating liquid supply equipment, the temperature control effect is provided, and the circulating cooling liquid supply equipment can provide liquid of different temperatures into the U-shaped coil pipe according to the actual needs, and the temperature of the inner mold 11 and the hydraulic chamber 7 is controlled through the heat exchange function of the coil pipe. Therefore, the temperature of the liquid can be adjusted according to the needs of the forming process, to ensure the quality and precision of the workpiece in the forming process.

[0039] The inner mold 11 adopts a detachable design, which provides a replaceable function, that is, by pre-setting several groups of inner molds 11 containing different sizes of hydraulic chambers 7, and corresponding punches 8, the size and bending requirements of different tube plate pieces can be quickly adapted. Since the size of the hydraulic chamber 7 and the shape of the punch 8 directly affect the precision of the forming process, the detachable inner mold 11 makes the mold have higher flexibility, which can replace the corresponding inner mold 11 and punch 8 combination according to different forming requirements, to meet the bending forming requirements of tube plate pieces of different specifications and shapes.

[0040] On the front side of the base 1, a total controller is installed, which can control all electronic components in the device, and can also receive signals from the temperature sensor and display them.

[0041] The upper side of the driving plate 6 is provided with a punch 8, and the punch 8 is embedded with a conductive core, so that the punch can respond to the electromagnetic pulse drive and carry out rapid and accurate workpiece deformation. The movement of the punch 8 is driven by the electromagnetic force generated by the electromagnetic coil, and the embedded conductive core improves the interaction efficiency between the electromagnetic pulse and the punch 8. The upper end of the punch 8 extends to the hydraulic chamber 7 and is in contact with the middle die 3 through the sealing ring. Specifically, in the embodiment, two groups of sealing rings are arranged above and below, which can effectively withstand the pressure from the liquid and ensure that the liquid does not leak through the contact surface between the punch 8 and the middle die 3 even in a high-pressure environment, thereby maintaining a high-pressure environment in the hydraulic chamber. Thus, under the action of the double sealing ring, the liquid in the hydraulic chamber 7 is prevented from leaking.

[0042] The upper end of the middle die 3 is provided with a tube plate piece placing groove 9, and the tube plate piece placing groove 9 is in communication with the hydraulic chamber 7. The middle die 3 is provided with a plate piece lifting assembly, which includes two groups of symmetrically arranged installation cavities 22. The installation cavities 22 are in communication with the tube plate piece placing groove 9, and the inner side of the installation cavity 22 is provided with a lifting spring telescopic piece 23. The upper end of the lifting spring telescopic piece 23 is provided with a contact block 24. When the tube plate piece is placed in the tube plate piece placing groove, the contact block 24 is stressed, and as the upper die 4 falls, it can generate extrusion force on the tube plate piece until the die is closed, at which time the tube plate piece is in a clamped and fixed state, and then after bending forming, the upper die 4 moves upward, and the lifting spring telescopic piece 23 gives the tube plate piece an opposing force through the contact block 24, facilitating the operator to take it down. Correspondingly, the two sides of the tube plate piece placing groove 9 are provided with an opening, which is convenient for the operator to insert by hand or with the help of tools to exert force on the tube plate piece.

[0043] The base 1 is connected with the upper die 4 through the second hydraulic drive assembly. The inner side of the upper die 4 is provided with a bending forming groove 10, and the bending forming groove 10 is in communication with the tube plate piece placing groove 9. The second hydraulic drive assembly includes fixed piles 17, which are uniformly provided with four groups, and the fixed piles 17 are fixedly connected with the supporting plate 15, thereby forming a whole with the supporting plate 15, which can effectively withstand the pressure generated during the working process of the hydraulic drive. The inner side of the two groups of fixed piles 17 is provided with a first electric hydraulic push rod 18, and the telescopic end of the first electric hydraulic push rod 18 is connected with the upper die 4. The two groups of first electric hydraulic push rods 18 are symmetrically arranged at an angle, which can ensure uniform force distribution when pushing the upper die 4, thereby improving the forming precision and avoiding uneven stress on the die. The inner side of the other two groups of fixed piles 17 is provided with a guide spring telescopic piece 19, and the telescopic end of the guide spring telescopic piece 19 is connected with the upper die 4. The main function of the driving assembly is to drive the upper die 4 to move up and down, cooperate with the hydraulic drive mode and the electromagnetic pulse drive mode, and realize the bending forming of the tube plate piece.

[0044] The lower end of the punch 8 is provided with a disc part, through which the driving force generated by the electromagnetic pulse can be more efficiently transmitted to the punch 8 to push it to move accurately. The outer side of the punch 8 is sleeved with a reset spring 25, the two ends of the reset spring 25 are connected with the middle die 3 and the disc part respectively, when the electromagnetic pulse stops working, the restoring force provided by the reset spring 25 quickly pushes the punch back to the initial position through the disc part.

[0045] A forming method of a tube plate piece electromagnetic auxiliary hydraulic bending forming die, comprising the following steps:

[0046] S1: Start the second hydraulic drive assembly to drive the upper die 4 to move upwards, open the mold, provide enough space for the installation and removal of the tube plate piece to be formed;

[0047] S2: After opening the mold, the operator puts the tube plate piece to be bent into the bending forming groove 10, and then starts the second hydraulic drive assembly to close the mold, at this time, the two parts of the mold (the upper die and the lower die) are closed, the tube plate piece is clamped in the bending forming groove, and is ready for bending forming.

[0048] S3: Start the first hydraulic drive assembly to drive the lower die plate 2 to move upwards, the upward movement of the lower die plate 2 causes the liquid in the hydraulic chamber 7 to rise, thereby driving the liquid in the hydraulic chamber 7 to contact the tube plate piece and pre-deform;

[0049] S4: Stop the first hydraulic drive assembly, start the power supply to energize the electromagnetic coil, the punch inductively generates eddy current to generate a pulse magnetic field, which drives the punch to move upwards at high speed for bending forming.

[0050] The present application adopts the contact mode of liquid and workpiece instead of directly contacting the punch 8, which reduces friction and material surface damage, thereby improving the surface quality of the tube plate piece and avoiding the scratch and damage problems in the traditional method. At the same time, through the control of the electromagnetic pulse, the speed and force of the punch can be accurately adjusted, the rebound and uneven deformation of the material are reduced, and the precision and surface quality of the workpiece are ensured.

[0051] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above embodiments, the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the framework and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A tube sheet piece electromagnetic auxiliary hydraulic bending forming die, comprising a base (1), a lower die plate (2), a middle die (3) and an upper die (4) are sequentially arranged above the base (1), characterized in that: The lower side of the base (1) is provided with a bottom cabinet (5), and the inner side of the bottom cabinet (5) is provided with a power supply. The bottom cabinet (5) is connected with the lower mold plate (2) through a first hydraulic drive assembly. The lower mold plate (2) is provided with a driving plate (6), and the driving plate (6) is provided with an electromagnetic coil. The base (1) is connected with the middle mold (3) through a supporting assembly. The inner side of the middle mold (3) is provided with a hydraulic chamber (7). The upper side of the driving plate (6) is provided with a punch (8), and the punch (8) is embedded with a conductive core. The upper end of the punch (8) extends to the hydraulic chamber (7) and is in contact with the middle mold (3) through a sealing ring. The upper end of the middle mold (3) is provided with a tube plate piece placing groove (9), and the tube plate piece placing groove (9) is communicated with the hydraulic chamber (7). The middle mold (3) is provided with a plate piece lifting assembly. The base (1) is connected with the upper mold (4) through a second hydraulic drive assembly. The inner side of the upper mold (4) is provided with a bending forming groove (10), and the bending forming groove (10) is communicated with the tube plate piece placing groove (9).

2. The electromagnetic auxiliary hydraulic tube sheet bending forming die according to claim 1, characterized in that: The inner side of the middle mold (3) is provided with an inner mold (11), and the inner cavity of the inner mold (11) corresponds to the hydraulic chamber (7). The inner mold (11) is fixedly connected with the middle mold (3) through bolts. The both sides of the middle mold (3) are provided with heat-conducting plates (12), and the heat-conducting plates (12) are in contact with the inner mold (11). The inner side of the heat-conducting plate (12) is provided with a U-shaped coil pipe (13). The both ends of the U-shaped coil pipe (13) pass through the middle mold (3) and are provided with pipe connectors (14).

3. The electromagnetic-assisted hydraulic tube sheet bending forming die according to claim 1, characterized in that: The supporting assembly comprises two groups of symmetrically arranged supporting plates (15). The supporting plates (15) are provided with extension seats (16) fixedly connected with the middle mold (3) through bolts. The places where the extension seats (16) are in contact with the middle mold (3) are designed in an L shape.

4. The electromagnetic-assisted hydraulic tube sheet bending forming die according to claim 3, characterized in that: The second hydraulic drive assembly comprises four groups of fixed piles (17) fixedly connected with the supporting plates (15). The inner sides of two groups of the fixed piles (17) are provided with first electric hydraulic push rods (18) connected with the upper mold (4) at the telescopic ends. The inner sides of the other two groups of the fixed piles (17) are provided with guide spring telescopic pieces (19) connected with the upper mold (4) at the telescopic ends.

5. The electromagnetic-assisted hydraulic tube sheet bending forming die according to claim 1, characterized in that: The first hydraulic drive assembly comprises second electric hydraulic push rods (20) connected with the base (1) through supports and connected with the lower mold plate (2) at the telescopic ends. The lower ends of the lower mold plate (2) are provided with guide columns (21) uniformly arranged in several groups. The lower ends of the guide columns (21) pass through the base (1).

6. The electromagnetic-assisted hydraulic tube sheet forming die of claim 1, wherein: The plate lifting assembly comprises two sets of symmetrically arranged mounting cavities (22) which are communicated with the tube plate placing groove (9), and the inner side of the mounting cavity (22) is mounted with a lifting spring telescopic part (23), and the upper end of the lifting spring telescopic part (23) is mounted with a contact block (24).

7. The electromagnetic-assisted hydraulic tube sheet bending forming die according to claim 1, characterized in that: The lower end of the punch (8) is provided with a disc part, and the outer side of the punch (8) is sleeved with a reset spring (25), and the two ends of the reset spring (25) are connected with the middle die (3) and the disc part respectively.

8. A method of forming a tube sheet member using the electromagnetic auxiliary hydraulic bending forming die according to claim 1, characterized by: The method comprises the following steps: S1: starting the second hydraulic driving assembly to drive the upper die (4) to move upward to open the mold; S2: after the mold is opened, the operator puts the tube plate to be bent into the bending forming groove (10), and then starts the second hydraulic driving assembly to close the mold; S3: starting the first hydraulic driving assembly to drive the lower die plate (2) to move upward, so that the liquid in the hydraulic chamber (7) is first driven to contact the tube plate to perform pre-deformation; S4: stopping the first hydraulic driving assembly, starting the power supply to energize the electromagnetic coil, the punch (8) induces eddy current to generate a pulse magnetic field, and the punch (8) is driven by the pulse magnetic field to move upward at high speed to perform bending forming.

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