Large-sized thin-walled rotary body member drawing forming device and method

Abstract

The application discloses a large-size thin-wall rotary body component deep drawing forming device and method, and relates to the technical field of deep drawing forming devices, and can be used for deep drawing forming of large-size thin-wall rotary body components. The device comprises a deep drawing system, an electromagnetic anti-expansion system and a discharge system. The deep drawing system comprises a male die, a female die and a blank holder. The female die is arranged below the blank holder, and a to-be-formed sheet is arranged between the female die and the blank holder. The male die is arranged above the to-be-formed sheet. The electromagnetic anti-expansion system comprises a coil, an epoxy plate, a coil support and a servo motor. The discharge system is used for charge and discharge control of the coil. When the male die is deep drawn downwards, the anti-expansion height and the number of coils that are charged and discharged in the coil change with the deep drawing stroke of the male die. The above scheme can control wrinkles and reduce anti-expansion force and deep drawing load in the deep drawing forming process.

Description

Technical Field

[0001] This invention relates to the field of rotary component forming technology, and more specifically, to a deep drawing forming apparatus and method for large-size thin-walled rotary components. Background Technology

[0002] Large-sized thin-walled rotating components have wide applications in the aerospace field, accounting for more than half of the overall mass of a rocket. For example, the bottom component of the fuel tank in a rocket is a typical large-sized thin-walled rotating component. With the continuous improvement of the carrying capacity of new aerospace vehicles, higher requirements are placed on the performance of new large-sized thin-walled rotating components. Therefore, obtaining large-sized thin-walled rotating components with high surface quality is extremely important.

[0003] In existing technologies, liquid-filled deep drawing is generally used. During liquid-filled deep drawing, the suspended area undergoes counter-expansion deformation under hydraulic pressure, which can control wrinkling. However, the liquid reaction force results in a large deep drawing load required for forming. Summary of the Invention

[0004] The problem solved by this invention is how to improve the large drawing load required for forming large-size thin-walled rotary components and the wrinkling problem of large-size thin-walled rotary components.

[0005] To address the aforementioned problems, the first aspect of this invention provides a deep drawing forming apparatus for large-size thin-walled rotating body components, comprising: a deep drawing system, an electromagnetic anti-expansion system, and a discharge system;

[0006] The deep drawing system includes a punch, a die, and a blank holder. The die is located below the blank holder, and the sheet material to be formed is placed between the die and the blank holder. The punch is located above the sheet material to be formed.

[0007] The electromagnetic anti-expansion system includes a coil, an epoxy board, a coil support, and a servo motor. The coil is wrapped by the epoxy board and connected to the coil support. The servo motor is connected to the coil support and is used to control the position of the coil through the coil support.

[0008] The discharge system is used for charging and discharging control of the coil;

[0009] When the punch is drawn downwards, the height of the coil expansion and the number of coils used for charging and discharging in the coil change with the drawing stroke of the punch.

[0010] Optionally, the coil includes multiple nested coil layers, and each coil layer is individually controlled by the discharge system.

[0011] Optionally, a power interface for the coil is provided below the coil support, and the coil is connected to the discharge system through the power interface.

[0012] Optionally, it also includes a servo motor bracket, which is connected to the servo motor.

[0013] Optionally, the discharge system includes a charging circuit and a capacitor, wherein the charging circuit is used to charge the capacitor.

[0014] Optionally, charging is stopped when the charging circuit charges the capacitor to a first forming voltage.

[0015] Optionally, the discharge system further includes a control system and a discharge circuit, the discharge circuit being connected to the coil, and the control system being used to control the switching between the charging circuit and the discharge circuit.

[0016] Optionally, the control system determines whether the charging circuit charges the capacitor to the first forming voltage. If the first forming voltage is reached, the discharge circuit is opened to charge the coil.

[0017] Optionally, it also includes a hydraulic system, which includes a hydraulic cylinder connected to the servo motor bracket, and the hydraulic cylinder is used to adjust the position of the servo motor bracket.

[0018] The beneficial effects of the large-size thin-walled rotary component deep drawing forming apparatus of the present invention are as follows: Compared with the prior art, the present invention opens the discharge circuit to charge the coil, thereby generating an induced current above the sheet to be formed. The induced current generated above the sheet to be formed and the current in the coil generate an Ampere force. This Ampere force causes the suspended area material to expand in the deep drawing process, thereby changing the stress state of the sheet to be formed and suppressing wrinkling. In the process of the punch drawing downward, the number of coils for charging and discharging gradually decreases as the cross-sectional length of the expansion zone decreases, and the height of the coil also gradually decreases as the deep drawing displacement increases. This controls the application of expansion force not to the part where the sheet to be formed is in contact with the punch at different deep drawing times, but only to the part where it is needed, thereby reducing the expansion force and deep drawing load in the deep drawing forming process.

[0019] A second aspect of this invention provides a method for deep drawing a large-size thin-walled rotating component, comprising the following steps:

[0020] Step S1: Determine the number of coils that are charged and discharged during different drawing strokes, as well as the reverse expansion height of the coils;

[0021] Step S2: Place the sheet material to be formed between the die and the pressure ring;

[0022] Step S3: Perform deep drawing. As the punch moves downward, the control system charges and discharges the coils according to the number of coils determined by different deep drawing strokes. The servo motor controls the coil position according to the coil's back expansion height until the deep drawing is completed, and the formed part is obtained.

[0023] The beneficial effects of the deep drawing method for large-size thin-walled rotating body components of the present invention are as follows: Compared with the prior art, the present invention first determines the number of charging and discharging coils and the reverse expansion height of the coils corresponding to different deep drawing strokes. During the deep drawing process, the control system charges and discharges the coils according to the number of coils determined for different deep drawing strokes. The discharge circuit charges the coils, thereby generating an induced current above the sheet metal to be formed. The induced current generated above the sheet metal to be formed and the current in the coil generate an Ampere force. This Ampere force causes reverse expansion of the suspended area material during the deep drawing process, changing the stress state of the sheet metal to be formed, thereby suppressing wrinkling. During the downward deep drawing process of the punch, the number of charging and discharging coils gradually decreases as the cross-sectional length of the reverse expansion area decreases. The servo motor controls the coil position according to the reverse expansion height of the coil. The height of the coil also gradually decreases as the deep drawing displacement increases. This controls that at different deep drawing times, no reverse expansion force is applied to the part of the sheet metal to be formed that is in contact with the punch. Only the part of the sheet metal to be formed that needs to be formed is subjected to the reverse expansion force, reducing the reverse expansion force and deep drawing load during the deep drawing process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a deep drawing forming device for a large-size thin-walled rotary body component according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the deep drawing system and the electromagnetic reverse expansion system;

[0026] Figure 3 Top view of coil mounting;

[0027] Figure 4 This is a schematic flowchart of a deep drawing method for a large-size thin-walled rotating component according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the curve showing the change in the height of the rebound.

[0029] Figure 6 This is a schematic diagram showing the change in the number of discharge coils with the drawing stroke.

[0030] Figure 7 This is one of the schematic diagrams of the electromagnetic reverse expansion deep drawing process;

[0031] Figure 8 This is the second schematic diagram of the electromagnetic reverse expansion deep drawing process;

[0032] Figure 9 This is the third schematic diagram of the electromagnetic reverse expansion deep drawing process;

[0033] Figure 10 This is the fourth schematic diagram of the electromagnetic reverse expansion deep drawing process;

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Drawing system, 11-Punch, 13-Die, 15-Pressure ring;

[0036] 2-Electromagnetic anti-expansion system, 21-Coil, 23-Epoxy board, 25-Coil bracket, 27-Servo motor, 29-Servo motor bracket;

[0037] 3-Discharge system, 31 capacitors;

[0038] 4-Hydraulic station;

[0039] 5-Hydraulic cylinder;

[0040] 6-Sheet material to be formed;

[0041] 7-Workbench surface. Detailed Implementation

[0042] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] like Figure 1 As shown, this embodiment of the invention provides a deep drawing forming apparatus for large-size thin-walled rotating body components, including: a deep drawing system 1, an electromagnetic anti-expansion system 2, and a discharge system 3;

[0044] The deep drawing system 1 includes a punch 11, a die 13 and a blank holder 15. The die 13 is located below the blank holder 15, and the sheet material 6 to be formed is placed between the die 13 and the blank holder 15. The punch 11 is located above the sheet material 6 to be formed. Figure 2 This is a schematic diagram of the deep drawing system 1 and the electromagnetic anti-expansion system 2.

[0045] Specifically, the die 13 is a circular ring. During the deep drawing process, the punch 11 is drawn downwards.

[0046] The electromagnetic anti-expansion system 2 includes a coil 21, an epoxy board 23, a coil support 25, and a servo motor 27. The coil 21 is wrapped by the epoxy board 23 and is connected to the coil support 25. The servo motor 27 is connected to the coil support 25 and is used to control the position of the coil 21 through the coil support 25. Figure 3A top view of coil 21 is shown below. Figure 3 As shown, in the circumferential direction, the coil support 25 is uniformly controlled by four evenly distributed servo motor groups, each consisting of a servo motor 27.

[0047] The anti-bulging zone is the area above the coil that is charged and discharged at different drawing stages, i.e., the bulging area of ​​the sheet material 6 to be formed. After the drawing begins, it is generally an arc-shaped area. The coil 21 can be charged and discharged. The coil 21 is connected to the coil support 25. The height of the coil 21 is adjusted by controlling the coil support 25, so as to match the size of the anti-bulging zone at different drawing stages, i.e., the size of the bulge. As the punch is drawn downwards, the anti-bulging zone becomes smaller and the bulge area gradually decreases.

[0048] Specifically, during the deep drawing process, the position of the coil 21 is controlled by the servo motor 27 until the deep drawing is completed.

[0049] The discharge system 3 is used to control the charging and discharging of the coil 21.

[0050] Specifically, the discharge system 3 charges the coil 21 to generate an induced current above the sheet material 6 to be formed. The induced current above the sheet material 6 and the current in the coil generate an Ampere force. This Ampere force causes the suspended material in the deep drawing process to expand, causing the sheet material 6 to be formed to deform and produce a bulge.

[0051] The discharge system 3 includes a discharge circuit, a charging circuit, and a control system. The discharge system 3 is used for charge and discharge control.

[0052] The control system in this invention is a control integration that controls different coils 21 respectively.

[0053] When the punch 11 is drawn downwards, the height of the coil expansion and the number of coils in the coil 21 that are charged and discharged change with the drawing stroke of the punch 11.

[0054] In this invention, the punch 11 is drawn downwards. As the punch 11 is drawn downwards, the number of coils 21 that are charged and discharged is reduced. At different drawing times, no counter-expansion force is applied to the part of the sheet material 6 to be formed that is in contact with the punch; counter-expansion force is only applied to the part of the sheet material 6 to be formed that needs to be formed, which greatly reduces the counter-expansion force and drawing load during the drawing process. The counter-expansion height refers to the distance between the upper surface of the die 13 and the upper surface of the bulge.

[0055] In summary, in this embodiment of the invention, the deep drawing forming device for large-size thin-walled rotating body components includes: a deep drawing system 1, an electromagnetic anti-expansion system 2, and a discharge system 3. The invention opens the discharge circuit to charge the coil 21, thereby generating an induced current above the sheet material 6 to be formed. The induced current above the sheet material 6 and the current in the coil generate an Ampere force. This Ampere force causes anti-expansion of the suspended area material during the deep drawing process, causing the sheet material 6 to deform and changing its stress state, thus suppressing wrinkling. During the downward deep drawing process of the punch, the number of coils for charging and discharging gradually decreases as the cross-sectional length of the anti-expansion area decreases, and the height of the coils also gradually decreases as the deep drawing displacement increases. This controls the application of anti-expansion force only in the required areas of the sheet material 6 at different deep drawing times, preventing the application of anti-expansion force to the part where the sheet material 6 is in contact with the punch, thus reducing the anti-expansion force and deep drawing load during the deep drawing process.

[0056] In one possible implementation, the coil 21 includes a plurality of nested coil layers, and each of the coil layers is individually controlled by the discharge system 3.

[0057] Specifically, the coils 21 at different positions are controlled to charge and discharge at different drawing depths. The coil 21 includes multiple nested coil layers, and each coil layer is individually controlled by the discharge system 3, thereby enabling each coil layer to be charged and discharged independently.

[0058] In one possible implementation, a power interface for the coil 21 is provided below the coil support 25, and the coil 21 is connected to the discharge system 3 through the power interface.

[0059] In one possible implementation, a servo motor bracket 29 is also included, which is connected to the servo motor 27.

[0060] Specifically, the servo motor 27 is connected to the servo motor bracket 29, which is a flat plate that supports the servo motor 27.

[0061] In one possible implementation, a hydraulic system is also included, which includes a hydraulic cylinder 5 connected to the servo motor bracket 29, and the hydraulic cylinder 5 is used to adjust the position of the servo motor bracket 29.

[0062] Specifically, in addition to the deep drawing system 1, the electromagnetic anti-expansion system 2 and the discharge system 3, the large-size thin-walled rotary component deep drawing forming device of the present invention also includes a hydraulic system, which includes a hydraulic station 4 and a hydraulic cylinder 5, and the hydraulic cylinder 5 is connected to the servo motor bracket 29.

[0063] Hydraulic cylinder 5 is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating or oscillating motion. It has a simple structure and reliable operation. When using hydraulic cylinder 5 to achieve reciprocating motion, a reduction gear is unnecessary, and there is no transmission backlash, resulting in smooth movement. In this invention, the function of hydraulic cylinder 5 is to adjust the position of the servo support. During the deep drawing process, the descent distance of the punch 11 is relatively large. Adjusting the position of coil 21 solely by servo motor 27 is insufficient; hydraulic cylinder 5 is also needed to adjust the position of servo motor support 29, thereby adjusting the position of coil 21. Hydraulic cylinder 5 is also connected to hydraulic station 4. The function of hydraulic station 4 is to drive and control hydraulic cylinder 5.

[0064] Specifically, the hydraulic cylinder 5 is placed below the worktable 7 to reduce the height of the device, thereby providing sufficient working space for the drawing punch 11. In this invention, not only is the height of the coil 21 controlled by the servo motor 27, but the displacement adjustment of the hydraulic cylinder 5 is also required to achieve stroke matching with the drawing punch 11.

[0065] In the above embodiments, each coil is individually controlled by the discharge system 3. The position of the coil 21 is controlled by the servo motor 27 and the hydraulic cylinder 5. As the punch 11 is drawn downward, the number of coils 21 that are charged and discharged is small. At different drawing times, the anti-expansion force is not applied to the part where the sheet material 6 to be formed is in contact with the punch. The anti-expansion force is only applied to the part where it is needed, thereby reducing the anti-expansion force and drawing load during the drawing process.

[0066] In one possible implementation, the discharge system includes a charging circuit and a capacitor 31, the charging circuit being used to charge the capacitor 31.

[0067] Specifically, the charging circuit charges capacitor 31 to store energy.

[0068] In one possible implementation, charging stops when the charging circuit charges the capacitor 31 to a first forming voltage.

[0069] Specifically, the first forming voltage is a preset forming voltage, which can be set by the implementer according to the specific situation. When the charging circuit charges capacitor 31 to the first forming voltage, the charging of capacitor 31 stops.

[0070] In one possible implementation, the discharge system 3 further includes a control system and a discharge circuit, the discharge circuit being connected to the coil 21, and the control system being used to control the switching between the charging circuit and the discharge circuit.

[0071] In one possible implementation, the control system determines whether the charging circuit charges the capacitor 31 to the first forming voltage. If the first forming voltage is reached, the discharge circuit is opened to charge the coil 21.

[0072] The control system in this invention is not only used to determine whether the charging circuit has reached the first forming voltage for the capacitor 31, but also to switch the charging and discharging circuit. It is a control integration that can independently control each coil turn.

[0073] In the above embodiment, as the punch 11 moves downward, it charges the capacitor 31 through the charging circuit to store energy. The control system determines whether the charging circuit charges the capacitor 31 to the first forming voltage. If the first forming voltage is reached, the control system switches the charging circuit to the discharging circuit. The discharging circuit is turned on, causing a decaying transient alternating current to be generated in the RLC oscillation circuit formed by the capacitor 31 and the coil, thereby charging the coil 21. In the embodiment of the present invention, the process of discharging the capacitor 31 is actually the process of charging the coil 21.

[0074] Figure 4 This is a schematic flowchart illustrating a method for deep drawing a large-size thin-walled rotating component according to an embodiment of the present invention. Figure 4 As shown, the method includes:

[0075] In this invention, the sheet material 6 to be formed does not only include aluminum alloy. Here, only 2219 aluminum alloy is used as the sheet material to be formed for description. The forming steps of a semi-ellipsoidal box bottom with a thickness of 4mm, a punch 11 shape of R=2250mm, and H=800mm are described.

[0076] Step S1: Determine the number of coils that are charged and discharged in coil 21 during different drawing strokes, as well as the reverse expansion height of coil 21.

[0077] First, determine the height of the anti-expansion zone corresponding to different drawing strokes.

[0078]

[0079] In the formula, Δh represents the reverse expansion height, which is the distance between the upper surface of the die 13 and the upper surface of the bulge; h represents the drawing stroke of the punch 11; and x... h This represents the x-coordinate of the intersection of the sheet metal molding area and the anti-bulging area. The sheet metal molding area refers to the part between the two anti-bulging areas, that is, the part between the two bulges that contacts the punch 11. h The vertical coordinate of the intersection of the sheet metal molding area and the anti-expansion area is represented by R, which represents the length of the semi-major axis of the ellipsoidal punch 11. hx The x-coordinate represents the center of the arc in the anti-expansion region. H represents the angle between the tangent at the intersection of the anti-expansion zone and the molding zone and the horizontal direction, and H represents the length of the minor semi-axis of the ellipsoidal punch 11.

[0080] Figure 5 This is a schematic diagram of the curve showing the change in the anti-inflation height. The anti-inflation height can be determined based on the above expression. Figure 5 The curve shown.

[0081] Next, determine the number of coils for different drawing strokes.

[0082]

[0083] In the formula, N represents the number of coils, l represents the coil width, and R represents the radius of the die. Since the distance between the punch 11 and the die 13 is very small compared to the size of the punch 11 and the die 13, it is assumed in this invention that the length of the major semi-axis of the ellipsoidal punch 11 is equal to the radius of the die.

[0084] Figure 6 This is a schematic diagram showing the change in the number of discharge coils with the drawing stroke when the coil width is 100mm.

[0085] Then, based on the height of the reverse expansion zone corresponding to different drawing strokes and the number of coils at different drawing strokes, the reverse expansion height of each coil at different drawing strokes is determined.

[0086]

[0087]

[0088] In the formula, L h The length of the cross-section of the anti-expansion zone is represented by , n is the coil number, where the coil number closest to the die opening is 0, and Δh′ represents the anti-expansion height of coil n at a certain drawing moment.

[0089] Step S2: Place the sheet material 6 to be formed between the die 13 and the pressure ring 15.

[0090] Step S3: Perform deep drawing. As the punch 11 moves downward, the control system charges and discharges the coil 21 according to the number of coils determined by different deep drawing strokes. The servo motor 27 controls the coil position according to the back expansion height of the coil 21 until the deep drawing is completed, and the formed part is obtained.

[0091] Specifically, the deep drawing process begins, and different numbers of coils are controlled to charge and discharge at corresponding heights according to different deep drawing strokes until the deep drawing is completed, resulting in a curved rotating part.

[0092] Figures 7 to 10 This is a schematic diagram of the electromagnetic reverse expansion deep drawing process, as shown below. Figure 7As shown, in the initial stage of deep drawing, the punch 11 is loaded according to a predetermined loading curve, which is a displacement curve of the punch 11 during the deep drawing process. At this time, all the coils 21 charge and discharge simultaneously, generating an induced current in the sheet material 6 to be formed above the coils. Under the action of the magnetic field, the sheet material 6 to be formed is subjected to an upward force, thereby generating a reverse expansion.

[0093] like Figure 8 As shown, with the increase of the drawing stroke, the cross-sectional length of the anti-expansion zone decreases. The shape of the induction coil used to generate anti-expansion changes according to the shape of the anti-expansion zone under the action of the hydraulic cylinder 5 and the servo motor 27. The number of coils used for the next charge-discharge cycle also changes accordingly. Figure 8 In the process, only some coils discharge, causing the sheet material to expand in reverse.

[0094] like Figure 9 As shown, as the drawing stroke continues to increase, the cross-sectional length of the reverse expansion zone continues to decrease. At this point, only two coils discharge to provide the force for the sheet to expand in reverse.

[0095] Repeat the process of discharge-reverse expansion, deep drawing, and discharge-reverse expansion, such as... Figure 10 As shown, the drawing stroke continues until the anti-expansion zone disappears. At this point, all coils 21 return to the lowest point under the control of hydraulic cylinder 5 and servo motor 27, and the drawing is completed.

[0096] In the above embodiments, the number of charging and discharging coils corresponding to different drawing strokes and the reverse expansion height of coil 21 are first determined. During the deep drawing process, the control system charges and discharges the coils according to the number of coils determined for different drawing strokes. The discharge circuit charges coil 21, thereby generating an induced current above the sheet material 6 to be formed. The induced current above the sheet material 6 and the current in the coil generate an Ampere force. This Ampere force causes reverse expansion of the suspended area material during the deep drawing process, changing the stress state of the sheet material to be formed, thereby suppressing wrinkling. During the downward deep drawing process of the punch, the number of charging and discharging coils varies with the reverse expansion area. As the cross-sectional length decreases, the servo motor 27 controls the coil position according to the coil's anti-expansion height. The coil height also gradually decreases as the drawing displacement increases, thereby controlling the anti-expansion force to be applied only to the required parts of the sheet metal 6 at different drawing times, rather than the part where the sheet metal 6 is in contact with the punch. This reduces the anti-expansion force and drawing load during the drawing process. In addition, by driving and controlling the coil position through the servo motor 27, the coil position can be adjusted according to the position and height of the anti-expansion zone. The servo motor 27 is driven and controlled using a pre-designed loading curve, thereby achieving digital control through the optimized loading curve.

[0097] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A deep drawing forming apparatus for large-size thin-walled rotary components, characterized in that, include: The deep drawing system (1), the electromagnetic reverse expansion system (2), and the discharge system (3) are included. The deep drawing system (1) includes a punch (11), a die (13) and a blank holder (15). The die (13) is located below the blank holder (15), and the sheet material (6) to be formed is placed between the die (13) and the blank holder (15). The punch (11) is located above the sheet material (6) to be formed. The electromagnetic anti-expansion system (2) includes a coil (21), an epoxy board (23), a coil support (25), and a servo motor (27). The coil (21) is wrapped by the epoxy board (23) and connected to the coil support (25). The servo motor (27) is connected to the coil support (25) and is used to control the position of the coil (21) through the coil support (25). The discharge system (3) is used to control the charging and discharging of the coil (21); When the punch (11) is drawn downwards, the coil expansion height and the number of coils in the coil (21) for charging and discharging change with the drawing stroke of the punch (11); the coil (21) includes multiple nested coil layers, and each coil layer is individually controlled by the discharge system (3).

2. The apparatus according to claim 1, characterized in that, A power interface for the coil (21) is provided below the coil bracket (25), and the coil (21) is connected to the discharge system (3) through the power interface.

3. The apparatus according to claim 1, characterized in that, It also includes a servo motor bracket (29), which is connected to the servo motor (27).

4. The apparatus according to claim 1, characterized in that, The discharge system (3) includes a charging circuit and a capacitor (31), wherein the charging circuit is used to charge the capacitor (31).

5. The apparatus according to claim 4, characterized in that, When the charging circuit charges the capacitor (31) to the first forming voltage, the charging stops.

6. The apparatus according to claim 5, characterized in that, The discharge system (3) further includes a control system and a discharge circuit. The discharge circuit is connected to the coil (21). The control system is used to control the switching between the charging circuit and the discharge circuit.

7. The apparatus according to claim 6, characterized in that, The control system determines whether the charging circuit charges the capacitor (31) to the first forming voltage. If the first forming voltage is reached, the discharge circuit is opened to charge the coil (21).

8. The apparatus according to claim 3, characterized in that, It also includes a hydraulic system, which includes a hydraulic cylinder (5) connected to the servo motor bracket (29), and the hydraulic cylinder (5) is used to adjust the position of the servo motor bracket (29).

9. A method for deep drawing large-size thin-walled rotating body components, characterized in that, The deep drawing apparatus for large-size thin-walled rotating components as described in any one of claims 1-8 includes the following steps: Step S1: Determine the number of coils that are charged and discharged in the coil (21) during different drawing strokes and the reverse expansion height of the coil (21); Step S2: Place the sheet material (6) to be formed between the die (13) and the pressure ring (15); Step S3: Deep drawing is performed. As the punch (11) moves downward, the control system charges and discharges the coil (21) according to the number of coils determined by different deep drawing strokes. The servo motor (27) controls the coil position according to the back expansion height of the coil (21) until the deep drawing is completed and the formed part is obtained.

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