Electrically-assisted local shaping die and method for super-large thin-wall component

Abstract

The invention relates to an electric auxiliary local shaping die and method for a super-large thin-wall component. The method comprises the following steps: firstly, determining a to-be-shaped area of the super-large thin-wall component with an out-of-tolerance size through a three-dimensional scanning technology; secondly, an electric auxiliary shaping die is designed according to the geometrical characteristics; a to-be-shaped area of the component is fixed in a shaping module, and the shaping module is connected with a low-voltage large-current pulse direct-current power source. And the current forms a power supply positive electrode-upper shaping module-component-lower shaping module-power supply negative electrode shaping loop, rapid heating and heat preservation are achieved on the local to-be-shaped area of the component, the local material is made to have sufficient creep deformation, and finally the shaping target is achieved. Compared with the prior art, a low-voltage large-current pulse direct-current power supply is adopted for directly heating the to-be-shaped area of the super-large component, and performance degradation caused by overall thermal circulation of the component is prevented. Meanwhile, current directionally flows to the large deformation position of the component, creep shaping of local materials is facilitated, and the device has the advantages of being low in equipment cost, simple in design, high in process flexibility and the like.

Description

Technical Field

[0001] This invention relates to the field of mechanical engineering, and in particular to an electrically assisted local shaping mold and method for ultra-large thin-walled components. Background Technology

[0002] With the rapid development of aerospace equipment towards lightweight and high performance, ultra-large thin-walled components (such as integral aircraft panels and rocket fuel tanks) are gradually becoming the mainstream choice for key structural parts due to their high specific strength and excellent space bearing efficiency. However, these components are typically characterized by large dimensions (span > 5m), thin wall thickness (0.5-3mm), and complex geometry. Affected by springback and residual stress, dimensional defects often occur during the forming process, making it difficult to achieve high-precision one-time forming. Currently, the industry generally relies on a shaping process to correct the precision of components formed in one step.

[0003] Patent CN202110183469.3 discloses a forming fixture and method for ultra-large cylindrical forgings. This method involves placing the invented ultra-large cylindrical forging forming fixture inside a heat treatment furnace, using a large-tonnage hydraulic jack as the force source to cause elastic deformation of the ultra-large cylindrical forging in the radial direction, thereby achieving the forming purpose. However, this method requires placing the entire forming fixture of the ultra-large forging inside the heat treatment furnace, which not only places extremely high demands on the internal dimensions of the heat treatment furnace, but also requires heating the large furnace cavity to the target temperature during the forming process, resulting in long processing time and high energy consumption.

[0004] Patent CN202011114518.X discloses a method for local shaping of titanium alloy components, which utilizes electromagnetic induction heating technology to perform hot deformation shaping of the titanium alloy components. However, for complex components, it is challenging to rationally arrange the electromagnetic induction coils according to their geometry to achieve a uniform magnetic field distribution. Furthermore, this method employs additional multiple pressure applications for shaping, and since the electromagnetic induction coils and the mold pressure application are two independent parts, interference is likely to occur, increasing the design complexity.

[0005] To address the aforementioned issues, there is an urgent need to explore a new, efficient, simple, and low-energy-consumption forming method to ensure the forming accuracy of ultra-large thin-walled components, break through the limitations of traditional hot forming technology on material performance and process costs, and provide technical support for the lightweight design and reliable manufacturing of next-generation aerospace equipment. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects of the prior art and provide an electrically assisted local shaping mold and method for ultra-large thin-walled components. This method can meet the shaping needs of ultra-large components, eliminating the need to place the entire component in a heating furnace for heating. Instead, it uses a low-voltage, high-current pulsed DC power supply to rapidly heat only the areas of the component that are out of size tolerance, while the areas that are within size tolerance remain at room temperature. This method has low energy consumption and prevents performance degradation caused by heating the entire component.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] In a first aspect, the present invention provides an electrically assisted local shaping method for ultra-large thin-walled components, comprising the following steps:

[0009] The 3D scanning technology is used to determine the area to be shaped where the dimensions of the ultra-large thin-walled component are out of tolerance. Based on the geometric characteristics of the area to be shaped, an electric-assisted local shaping mold for the ultra-large thin-walled component is designed. The electric-assisted local shaping mold for the ultra-large thin-walled component includes a component support module, a component shaping module and a core mold.

[0010] The area to be shaped of the ultra-large thin-walled component is fixed between the component shaping module and the core mold. The component shaping module is connected to a power supply, which is a low-voltage, high-current pulsed DC power supply.

[0011] Set the electrical parameters for the electro-assisted shaping process;

[0012] When the power switch is turned on, the current forms a shaping circuit of "power positive terminal - component shaping module - ultra-large thin-walled component - component shaping module - power negative terminal";

[0013] Once the temperature reaches the target shaping temperature, the power is turned off after a period of time, allowing the ultra-thin-walled component material to undergo sufficient creep, thereby achieving the desired shape.

[0014] The ultra-large thin-walled component is cooled to room temperature in the component shaping module before being removed.

[0015] Furthermore, the process of fixing the area to be shaped of the ultra-large thin-walled component in the component shaping module includes the following steps:

[0016] The area to be shaped of the ultra-large thin-walled component is fixed between the component shaping module and the core mold;

[0017] Install component support modules on both sides of the component shaping module and lock them in place.

[0018] Furthermore, the process of setting the electrical parameters for the electro-assisted shaping process includes the following steps:

[0019] The low-voltage, high-current pulsed DC power supply is in constant current output mode.

[0020] The current density, current frequency, and duty cycle are determined based on the resistivity of the material of the ultra-large thin-walled component and the target shaping temperature.

[0021] Furthermore, dimensional deviation refers to the difference between the actual formed dimensions of a component and its theoretical design dimensions. The deviation is determined by scanning the component model with a 3D scanner to obtain a point cloud, and then comparing the point cloud with the theoretical digital model. Generally, an error exceeding ±0.5mm is defined as dimensional deviation.

[0022] In a second aspect, the present invention provides an electrically assisted local shaping mold for ultra-large thin-walled components, used to implement the aforementioned electrically assisted local shaping method for ultra-large thin-walled components. The electrically assisted local shaping mold for ultra-large thin-walled components includes a component support module, a component shaping module, and a core mold.

[0023] Furthermore, the area to be shaped of the ultra-large thin-walled component is fixed between the component shaping module and the core mold, that is, the core mold and the component shaping module are respectively located on the inner and outer sides of the area to be shaped of the ultra-large thin-walled component; the component support module is located on both sides of the component shaping module.

[0024] Furthermore, the component shaping module and the core mold are used to ensure the dimensional accuracy of the shape and internal cavity of the area to be shaped in the ultra-large thin-walled component.

[0025] Furthermore, the component support module is used to prevent deformation, such as indentation, at the connection between the shaped area and the non-shaped area.

[0026] Furthermore, the components forming module, support module, and core mold are all made of heat-resistant stainless steel or high-temperature alloy.

[0027] Furthermore, multiple component shaping modules are set up; a component support module is set on each side of each component shaping module; an insulating sheet is installed between two adjacent shaping modules.

[0028] Furthermore, the insulating sheet can be a ceramic sheet. The ceramic sheets are installed between the component shaping modules to prevent current from flowing directly through the component shaping modules instead of through the ultra-large thin-walled component.

[0029] Furthermore, the surface of the core mold is insulated.

[0030] Furthermore, an insulating pad is installed between the component shaping module and the component support module. That is, an insulating layer is provided between the component shaping module and the component support module to ensure that the current flows only through the shaping area of ​​the ultra-large thin-walled component.

[0031] Furthermore, the low-voltage, high-current pulsed DC power supply includes a positive terminal and a negative terminal; the positive and negative terminals of the low-voltage, high-current pulsed DC power supply are connected to the component shaping module.

[0032] Furthermore, the low-voltage high-current pulsed DC power supply outputs a constant current pulse.

[0033] Furthermore, two component shaping modules are provided, with an insulating sheet installed between them; one component shaping module is connected to the positive terminal of a low-voltage, high-current pulsed DC power supply; the other component shaping module is connected to the negative terminal of the low-voltage, high-current pulsed DC power supply. That is, the component shaping module consists of an upper shaping module and a lower shaping module, which are respectively connected to the positive and negative terminals of the low-voltage, high-current pulsed DC power supply, and are used to shape ultra-large thin-walled components, ensuring the dimensional accuracy of the area to be shaped.

[0034] Furthermore, the core mold is used to support the inner cavity of the ultra-large thin-walled component, ensuring the dimensional accuracy of the inner cavity during the electric-assisted shaping process.

[0035] Furthermore, the internal cavity dimensions of both the component shaping module and the component support module are consistent with the dimensions of the target component.

[0036] Furthermore, the component shaping module is additionally designed with electrode clamping points for connection to a power source.

[0037] Furthermore, the component shaping module is equipped with thermocouples to measure the temperature during the shaping process.

[0038] Furthermore, the electro-assisted local shaping method for ultra-large thin-walled components, employing the electro-assisted local shaping mold for ultra-large thin-walled components, specifically includes the following steps:

[0039] S1: 3D scanning technology is used to acquire the surface morphology features of ultra-large thin-walled components, and the collected spatial coordinate data is compared and analyzed with the original design model. By comparing the differences between the actual measurement data and the original design values, the areas that need to be shaped are determined, i.e., the areas to be shaped, and an electrically assisted local shaping mold for the ultra-large thin-walled components is designed based on the geometric characteristics of the areas to be shaped.

[0040] S2: The area to be shaped of the ultra-large thin-walled component is fixed in the component shaping module, and the mold is locked with insulating screws. The upper and lower shaping modules are connected to the positive and negative terminals of a low-voltage, high-current pulsed DC power supply, respectively. In addition, component support modules are installed on both sides of the component shaping module. Insulating gaskets are installed between the component shaping module and the component support modules, and ceramic sheets are installed between the upper and lower shaping modules.

[0041] S3: Set the current value, current frequency, and duty cycle for the electric-assisted shaping process;

[0042] S4: Turn on the power switch, and the current forms a shaping circuit of "power positive terminal - upper shaping module - ultra-large thin-walled component - lower shaping module - power negative terminal";

[0043] S5: Based on the temperature of the component to be shaped monitored by thermocouples, after the temperature reaches the target shaping temperature, the power is stopped after a period of heat preservation, so that the material of the ultra-thin wall component undergoes sufficient creep under the combined action of Joule heating effect and non-thermal effect caused by current, thereby achieving the shaping.

[0044] S6: The ultra-large thin-walled component is cooled to room temperature in the component shaping module before being taken out.

[0045] Compared with the prior art, the present invention has the following advantages:

[0046] (1) The present invention can meet the shaping requirements of ultra-large components. It is no longer necessary to place the entire component in a heating furnace for heating. Instead, it uses a low-voltage, high-current pulsed DC power supply to quickly heat only the area of ​​the component that is out of size tolerance, while the area with acceptable size remains at room temperature. It has low energy consumption and prevents the performance degradation caused by heating the entire component.

[0047] (2) The location of plastic deformation in ultra-large thin-walled components is usually accompanied by thickness reduction and a decrease in cross-sectional area. During the shaping process, the power supply outputs a constant current. Therefore, the current density in the area to be shaped is high, which is conducive to local heating of the target area, thereby promoting material creep and achieving shaping.

[0048] (3) The positive and negative terminals of the low-voltage high-current pulse DC power supply are directly connected to the copper electrodes on the surface of the shaping module. After the shaping circuit “power supply positive terminal - component shaping module - ultra-large thin-walled component - component shaping module - power supply negative terminal” is turned on, the current flows in a direction to the component to be shaped based on physical laws. There is no need to design coils and other structures separately according to the geometric characteristics of the component. The heating equipment is simple and the process is highly flexible. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of the electrically assisted local shaping mold for ultra-large thin-walled components in this embodiment.

[0050] Figure 2 This is a cross-sectional view of the portion of the ultra-thin-walled component to be shaped, corresponding to the electrically assisted local shaping mold of the ultra-thin-walled component in this embodiment.

[0051] Figure label:

[0052] 1. Ultra-large thin-walled component; 2. Upper shaping module; 3. Lower shaping module; 4. Upper support module; 5. Lower support module; 6. Core mold; 7. Insulating gasket; 8. Low-voltage high-current pulse DC power supply; 9. Ceramic sheet; 10. Insulating screw. Detailed Implementation

[0053] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0054] In this invention, any component models, material names, connection structures, control methods, etc., not explicitly stated are considered common technical features disclosed in the prior art.

[0055] This invention provides an electrically assisted local shaping mold and method for ultra-large thin-walled components, the method comprising the following steps:

[0056] The 3D scanning technology is used to determine the area to be shaped where the dimensions of the ultra-large thin-walled component are out of tolerance. Based on the geometric characteristics of the area to be shaped, an electric-assisted local shaping mold for the ultra-large thin-walled component is designed. The electric-assisted local shaping mold for the ultra-large thin-walled component includes a component support module, a component shaping module and a core mold 6.

[0057] The area to be shaped of the ultra-large thin-walled component is fixed between the component shaping module and the core mold 6. The component shaping module is connected to a power supply, which is a low-voltage, high-current pulsed DC power supply 8.

[0058] Set the electrical parameters for the electro-assisted shaping process;

[0059] When the power switch is turned on, the current forms a shaping circuit of "power positive terminal - component shaping module - ultra-large thin-walled component - component shaping module - power negative terminal";

[0060] Once the temperature reaches the target shaping temperature, the power is turned off after a period of time, allowing the ultra-thin-walled component material to undergo sufficient creep, thereby achieving the desired shape.

[0061] The ultra-large thin-walled component is cooled to room temperature in the component shaping module before being removed.

[0062] In some embodiments of the present invention, the component shaping module and the core mold 6 are used to ensure the dimensional accuracy of the shape and inner cavity of the component shaping module, and the component support module is used to prevent deformation, such as indentation, at the connection between the shaping area and the non-shaping area.

[0063] In some embodiments of the present invention, the component shaping module, the component support module, and the core mold 6 are all made of heat-resistant stainless steel or high-temperature alloy.

[0064] In some embodiments of the present invention, the surface of the core mold 6 is insulated.

[0065] In some embodiments of the present invention, a component support module shall be provided on each side of each component shaping module.

[0066] In some embodiments of the present invention, an insulating pad 7 shall be installed between the component shaping module and the component support module.

[0067] In some embodiments of the present invention, a ceramic sheet 9 shall be installed between the two component shaping modules.

[0068] In some embodiments of the present invention, the positive and negative terminals of the low-voltage, high-current pulsed DC power supply are directly connected to the component shaping module.

[0069] In some embodiments of the present invention, the power supply outputs a constant current pulse.

[0070] Example

[0071] This embodiment provides an electrically assisted local shaping mold for ultra-large thin-walled components, such as... Figure 1 As shown, the forming mold includes a component forming module, a component support module, and a core mold 6. Specifically, the component forming module is divided into an upper forming module 2 and a lower forming module 3, and the component support module is divided into an upper support module 4 and a lower support module 5.

[0072] The upper shaping module 2 and the lower shaping module 3 are arranged vertically. The area to be shaped of the ultra-large thin-walled component 1 is placed in the groove formed on the sides of the upper shaping module 2 and the lower shaping module 3. Component support modules are provided on both sides of the component shaping module to support the ultra-large thin-walled component 1 along its length, and the inner cavity of the ultra-large thin-walled component 1 is supported by the core mold 6. The ultra-large thin-walled component 1 is located between the core mold 6 and the component shaping module. The upper support module 4 and the lower support module 5 are arranged vertically and assembled on both sides of the component shaping module. The upper shaping module 2 and the lower shaping module 3 are locked together by insulating screws 10. The insulating screws 10 can be commercially available or purchased parts. The insulating screws 10 are obtained by impregnating the screws with an epoxy resin matrix for insulation treatment. The upper shaping module 2 is connected to the positive terminal of the low-voltage high-current pulsed DC power supply 8, and the lower shaping module 3 is connected to the negative terminal of the low-voltage high-current pulsed DC power supply 8. An insulating gasket 7 separates the component shaping module from the component support module, and a ceramic sheet 9 separates the upper shaping module 2 from the lower shaping module 3. This ensures that during the shaping process, the current only passes through the upper shaping module 2 and the lower shaping module 3 and the area to be shaped of the ultra-large thin-walled component 1, and that the current must pass through the ultra-large thin-walled component 1, thereby achieving local shaping of the ultra-large thin-walled component 1. A cross-sectional view of the part of the ultra-large thin-walled component 1 to be shaped is shown below. Figure 2 As shown.

[0073] The components forming module, support module and core mold 6 are all made of heat-resistant stainless steel (such as 309S, 310S, etc.) or high-temperature alloy.

[0074] The surface of the core mold 6 is insulated, and the insulation treatment method can be to spray a high-temperature ceramic coating on the surface.

[0075] The core mold 6 is used to support the inner cavity of the ultra-large thin-walled component, ensuring the dimensional accuracy of the inner cavity during the electrically assisted shaping process. The dimension of one side of the core mold 6 is consistent with the inner cavity dimension of the target component (the area to be shaped of the ultra-large thin-walled component 1).

[0076] The dimensions of the inner cavity (groove formed on the side) of the component shaping module and the component support module are consistent with the dimensions of the target component (the area to be shaped of the ultra-large thin-walled component 1).

[0077] The component shaping module is additionally designed with an electrode clamp for connection to a low-voltage, high-current pulsed DC power supply 8.

[0078] The component shaping module is equipped with thermocouples to measure the temperature during the shaping process.

[0079] through Figure 1 The method for local shaping of ultra-large thin-walled components using the mold shown includes the following steps:

[0080] S1: The surface morphology features of the ultra-large thin-walled component 1 are obtained using 3D scanning technology. The collected spatial coordinate data is compared and analyzed with the original design model. By comparing the differences between the actual measured data and the original design values, the area that needs to be shaped (the actual size deviates from the theoretical design size by more than ±0.5mm) is determined, i.e., the area to be shaped. Based on the geometric characteristics of the area to be shaped, an electrically assisted local shaping mold for the ultra-large thin-walled component is designed. The electrically assisted local shaping mold for the ultra-large thin-walled component specifically includes a component shaping module (including an upper shaping module 2 and a lower shaping module 3), a component support module (including an upper support module 4 and a lower support module 5), and a core mold 6.

[0081] S2: Fix the area to be shaped of the ultra-large thin-walled component 1 between the upper shaping module 2, the lower shaping module 3, and the core mold 6. Install upper support modules 4 and lower support modules 5 on both sides of the upper shaping module 2 and the lower shaping module 3, that is, both sides of the component shaping module are provided with upper support modules 4 and lower support modules 5, and lock the mold with insulating screws 10. Connect the component shaping module to the power supply, specifically, connect the upper shaping module 2 to the positive terminal of the low-voltage high-current pulsed DC power supply 8, and connect the lower shaping module 3 to the negative terminal of the low-voltage high-current pulsed DC power supply 8. Install an insulating gasket 7 between the component shaping module and the component support module, and install a ceramic sheet 9 between the upper shaping module 2 and the lower shaping module 3.

[0082] S3: Determine the electrical parameters for the electrically assisted shaping process. The low-voltage, high-current pulsed DC power supply 8 is in constant current output mode (constant current pulse). The current density, current frequency, and duty cycle are determined based on the resistivity of the material of the ultra-large thin-walled component 1 and the target shaping temperature.

[0083] Furthermore, taking ultra-large thin-walled titanium alloy components as an example, a current density of 15 A / mm² can be selected. 2 The current frequency is 200Hz and the duty cycle is 25%.

[0084] S4: When the power switch is turned on, the current forms a shaping circuit: "Power positive terminal - Upper shaping module 2 - Ultra-large thin-walled component 1 - Lower shaping module 4 - Power negative terminal". The local temperature of the component rises based on the Joule heating effect of the current.

[0085] S5: Based on the temperature of the area to be shaped of the ultra-large thin-walled component 1 monitored by thermocouples, after the temperature reaches the target shaping temperature, the power is stopped after a period of heat preservation, so that the material undergoes sufficient creep under the combined action of the Joule heating effect and non-thermal effect caused by the current, thereby achieving the shaping.

[0086] Furthermore, taking the titanium alloy ultra-large thin-walled component as an example, the target forming temperature is 750℃. If the target forming temperature is too low, it will result in high material deformation resistance and poor forming effect. If the target forming temperature is too high, it will result in severe high-temperature deterioration of the material. Taking these two points into consideration, 750℃ (an empirical value obtained from multiple tests) is selected.

[0087] Furthermore, taking ultra-large thin-walled titanium alloy components as an example, the heat preservation time is 1 hour to 1.5 hours;

[0088] S6: The ultra-large thin-walled component 2 is cooled to room temperature in the component shaping module before being taken out.

[0089] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

[0090] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A method for electrically assisted local shaping of ultra-large thin-walled components, characterized in that, Includes the following steps: The dimensional deviation of the ultra-thin-walled component is determined by three-dimensional scanning technology. The electric-assisted local shaping mold of the ultra-thin-walled component is designed according to the geometric characteristics of the area to be shaped. The electric-assisted local shaping mold of the ultra-thin-walled component includes a component support module, a component shaping module and a core mold (6). The area to be shaped of the ultra-large thin-walled component is fixed between the component shaping module and the core mold (6). The component shaping module is connected to a power supply, which is a low-voltage high-current pulse DC power supply (8). Set the electrical parameters for the electro-assisted shaping process; When the power switch is turned on, the current forms a shaping circuit of "power positive terminal - component shaping module - ultra-large thin-walled component - component shaping module - power negative terminal"; Once the temperature reaches the target shaping temperature, the material is kept at that temperature for a period of time before the power is turned off, allowing the ultra-thin-walled component material to undergo sufficient creep, thereby achieving the desired shape. The ultra-large thin-walled component is cooled to room temperature in the component shaping module before being removed.

2. The method for electrically assisted local shaping of ultra-large thin-walled components according to claim 1, characterized in that, The process of fixing the area to be shaped of an ultra-large thin-walled component in the component shaping module includes the following steps: The area to be shaped of the ultra-large thin-walled component is fixed between the component shaping module and the core mold (6); Install component support modules on both sides of the component shaping module and lock them in place.

3. The method for electrically assisted local shaping of ultra-large thin-walled components according to claim 1, characterized in that, The process of setting the electrical parameters for the electro-assisted shaping procedure includes the following steps: The low-voltage high-current pulsed DC power supply (8) is in constant current output mode; The current density, current frequency, and duty cycle are determined based on the resistivity of the material of the ultra-large thin-walled component and the target shaping temperature.

4. A mold for electrically assisted local shaping of ultra-large thin-walled components, used to implement the electrically assisted local shaping method for ultra-large thin-walled components as described in any one of claims 1-3, characterized in that, The electric-assisted local shaping mold for ultra-large thin-walled components includes a component support module, a component shaping module, and a core mold (6). The area to be shaped of the ultra-large thin-walled component is fixed between the component shaping module and the core mold (6); The component support module is located on both sides of the component shaping module; The component shaping module and the core mold (6) are used to ensure the dimensional accuracy of the shape and inner cavity of the area to be shaped in the ultra-large thin-walled component; The component support module is used to prevent deformation at the connection between the shaped area and the non-shaped area.

5. The electrically assisted local shaping mold for ultra-large thin-walled components according to claim 4, characterized in that, The components forming module, support module and core mold (6) are all made of heat-resistant stainless steel or high-temperature alloy.

6. The electrically assisted local shaping mold for ultra-large thin-walled components according to claim 4, characterized in that, Set up multiple component shaping modules; Each component shaping module has a component support module on each side; An insulating sheet is installed between two adjacent shaping modules.

7. The electrically assisted local shaping mold for ultra-large thin-walled components according to claim 4, characterized in that, The surface of the core mold (6) is insulated; An insulating pad is installed between the component shaping module and the component support module.

8. The electrically assisted local shaping mold for ultra-large thin-walled components according to claim 4, characterized in that, The low-voltage, high-current pulsed DC power supply (8) includes a positive terminal and a negative terminal; The positive and negative terminals of the low-voltage high-current pulsed DC power supply (8) are connected to the component shaping module.

9. The electrically assisted local shaping mold for ultra-large thin-walled components according to claim 8, characterized in that, The low-voltage high-current pulse DC power supply (8) outputs a constant current pulse. Two component shaping modules are set up, and an insulating sheet is installed between the two component shaping modules; One component shaping module is connected to the positive terminal of the low-voltage high-current pulsed DC power supply (8); the other component shaping module is connected to the negative terminal of the low-voltage high-current pulsed DC power supply (8).

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