Vacuum high-temperature thin-wall component air pressure bulging device

Abstract

The utility model relates to the technical field of metal material processing, in particular to a vacuum high-temperature thin-wall component air pressure bulging device which comprises a base, a support and a forming assembly, the forming assembly comprises a furnace body, a pressure component, a furnace cover, a bulging lower die, a nickel-based sealing gasket and a bulging upper die, the furnace body is provided with a lower boss, and the lower boss is located in the furnace body. The furnace cover is located at the top of the furnace body, the lower bulging die is located above the lower boss, the nickel-based sealing gasket is located between the lower bulging die and the lower boss, the upper bulging die is located at the top of the lower bulging die, and the pressure component is connected with the furnace cover and the support. A low-price graphite mold can be adopted in a vacuum environment, the surface oxidation of a formed component is less, the forming quality is higher, the operation is convenient, and the component sealing is easy to realize.

Description

Technical Field

[0001] This utility model relates to the field of metal material processing technology, and in particular to a vacuum high-temperature thin-walled component gas pressure expansion device. Background Technology

[0002] In the aerospace field, lightweight, high-temperature resistant thin-walled structural components are widely used. Traditional forming methods mainly employ rigid die hot stamping, which has several problems: First, it places extremely high demands on the die material, typically requiring high-temperature resistant and high-strength materials, which not only increases die costs but also limits die lifespan; second, traditional methods struggle to form components with complex shapes, and forming thin-walled components with complex curved surfaces or internal structures is extremely difficult; furthermore, metal surfaces are prone to oxidation at high temperatures, leading to a decline in the surface quality of the formed components, and in some cases, forming may even be impossible at extremely high temperatures.

[0003] Therefore, developing a device capable of high-temperature forming in a vacuum environment to reduce mold costs, improve forming quality, and achieve the forming of complex-shaped components is of great practical significance. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum high-temperature thin-walled component air pressure expansion forming device, which solves the problems of high mold cost, high forming difficulty and low forming quality in the traditional method of processing lightweight high-temperature resistant thin-walled structural components.

[0005] To achieve the above objectives, this utility model provides a vacuum high-temperature thin-walled component pneumatic expansion forming device, including a base and a support, wherein the support is fixedly connected to the base and is located on top of the base, and also includes a forming component;

[0006] The forming assembly includes a furnace body, a pressure member, a furnace cover, a lower bulging mold, a nickel-based sealing gasket, and an upper bulging mold. The furnace body has a lower boss located inside the furnace body. The furnace cover is located at the top of the furnace body. The lower bulging mold is located above the lower boss. The nickel-based sealing gasket is located between the lower bulging mold and the lower boss. The upper bulging mold is located at the top of the lower bulging mold. The pressure member is connected to the furnace cover and the support respectively.

[0007] The pressure component includes a hydraulic cylinder, a pressure head, and a piston mandrel. The hydraulic cylinder is fixedly connected to the bracket and is located on the side of the bracket away from the base. The pressure head is fixedly connected to the output end of the hydraulic cylinder. The piston mandrel is slidably connected to the furnace cover and corresponds to the pressure head.

[0008] The lower bulging mold has a sealing groove located on the side of the lower bulging mold closest to the upper bulging mold; the upper bulging mold has a boss located on the side of the upper bulging mold closest to the lower bulging mold.

[0009] The furnace body has an air inlet and an air outlet, with the air outlet located on one side of the furnace body; the air inlet is located on the side of the furnace body away from the air outlet and is connected to the lower bulging mold.

[0010] The lower mold also has a conical vent, which is located on the side of the lower mold near the lower boss.

[0011] The vacuum high-temperature thin-walled component gas pressure expansion device also includes a silicon molybdenum rod heating element, which is located inside the furnace body.

[0012] The forming component further includes a sealing ring, which is located between the furnace body and the furnace cover.

[0013] This invention relates to a vacuum high-temperature thin-walled component pneumatic bulging device. The process involves opening the furnace lid, placing a nickel-based sealing gasket between the lower boss and the lower bulging mold, placing the metal material laminate to be processed on the upper surface of the lower bulging mold, assembling the upper bulging mold with the lower bulging mold, closing the furnace lid, and applying a clamping force downwards through a power component. This pressure is transmitted to the upper bulging mold, compressing the nickel-based sealing gasket and achieving a seal between the lower boss and the lower bulging mold. The upper bulging mold also compresses the metal material laminate to be processed, achieving a seal between it and the lower bulging mold. A mechanical pump and a molecular pump are used to sequentially evacuate the furnace, heat the furnace to the forming temperature and maintain this temperature, then introduce inert gas into the furnace to apply pressure. This pressure causes the metal material laminate to undergo plastic deformation, completing the bulging process. The advantages include the ability to use inexpensive graphite molds in a vacuum environment, less surface oxidation of the formed component, higher forming quality, convenient operation, and easy component sealing. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall structure of the vacuum high-temperature thin-walled component gas pressure expansion device according to the first embodiment of this utility model.

[0016] Figure 2This is a cross-sectional structural schematic diagram of the vacuum high-temperature thin-walled component gas pressure expansion device according to the first embodiment of this utility model.

[0017] Figure 3 This is the utility model Figure 2 Enlarged view of point A.

[0018] Figure 4 This is the utility model Figure 2 Enlarged view of point B.

[0019] Figure 5 This is a schematic diagram of the structure of the bulging lower mold according to the first embodiment of this utility model.

[0020] Figure 6 This is a schematic diagram of the structure of the bulging upper mold according to the first embodiment of this utility model.

[0021] In the diagram: 101-base, 102-bracket, 103-furnace body, 104-furnace cover, 105-lower bulging mold, 106-nickel-based sealing gasket, 107-upper bulging mold, 108-lower boss, 109-hydraulic cylinder, 110-pressure head, 111-piston mandrel, 112-sealing groove, 113-bore, 114-air inlet, 115-air extraction port, 116-conical vent, 117-silicon molybdenum rod heating element, 118-sealing ring. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0023] The first embodiment of this application is as follows:

[0024] Please see Figures 1 to 6 ,in, Figure 1 This is a schematic diagram of the overall structure of the vacuum high-temperature thin-walled component gas pressure expansion device according to the first embodiment of this utility model. Figure 2 This is a cross-sectional structural schematic diagram of the vacuum high-temperature thin-walled component gas pressure expansion device according to the first embodiment of this utility model. Figure 3 This is the utility model Figure 2 Enlarged view of point A. Figure 4 This is the utility model Figure 2 Enlarged view of point B. Figure 5 This is a schematic diagram of the structure of the bulging lower mold 105 according to the first embodiment of this utility model. Figure 6 This is a schematic diagram of the structure of the bulging upper mold 107 according to the first embodiment of this utility model.

[0025] This utility model provides a vacuum high-temperature thin-walled component pneumatic bulging device: including a base 101, a support 102, a forming component, and a silicon molybdenum rod heating element 117. The forming component includes a furnace body 103, a pressure component, a furnace cover 104, a lower bulging mold 105, a nickel-based sealing gasket 106, an upper bulging mold 107, and a sealing ring 118. The furnace body 103 has a lower boss 108, an air inlet 114, and an air outlet 115. The pressure component includes a hydraulic cylinder 109, a pressure head 110, and a piston mandrel 111. The lower bulging mold 105 has a sealing groove 112 and a conical air vent 116. The upper bulging mold 107 has a boss 113. The aforementioned solution solves the problems of high mold cost, high forming difficulty, and low forming quality in the traditional method of processing lightweight high-temperature resistant thin-walled structural components.

[0026] In this specific embodiment, the bracket 102 is fixedly connected to the base 101 and is located on top of the base 101. The furnace body 103 has a lower boss 108, which is located inside the furnace body 103. The furnace cover 104 is located on top of the furnace body 103. The lower bulging mold 105 is located above the lower boss 108. The nickel-based sealing gasket 106 is located between the lower bulging mold 105 and the lower boss 108. The upper bulging mold 107 is located on top of the lower bulging mold 105. The pressure member is connected to the furnace cover 104 and the bracket 102 respectively.

[0027] The hydraulic cylinder 109 is fixedly connected to the bracket 102 and is located on the side of the bracket 102 away from the base 101; the pressure head 110 is fixedly connected to the output end of the hydraulic cylinder 109; the piston spindle 111 is slidably connected to the furnace cover 104 and corresponds to the pressure head 110.

[0028] Secondly, the lower bulging mold 105 has a sealing groove 112, which is located on the side of the lower bulging mold 105 near the upper bulging mold 107; the upper bulging mold 107 has a boss 113, which is located on the side of the upper bulging mold 107 near the lower bulging mold 105.

[0029] Meanwhile, the furnace body 103 has an air inlet 114 and an air outlet 115. The air outlet 115 is located on one side of the furnace body 103. The air inlet 114 is located on the side of the furnace body 103 away from the air outlet 115 and is connected to the lower bulging mold 105.

[0030] In addition, the lower mold also has a conical vent 116, which is located on the side of the lower mold near the lower boss 108.

[0031] Meanwhile, the silicon molybdenum rod heating element 117 is located inside the furnace body 103.

[0032] Finally, the sealing ring 118 is located between the furnace body 103 and the furnace cover 104.

[0033] Using the vacuum high-temperature thin-walled component gas pressure bulging device of this embodiment, firstly, the furnace cover 104 is opened, and the nickel-based sealing gasket 106 and the lower bulging mold 105 are positioned on the lower boss 108 of the furnace body 103 through the conical vent hole. Then, a dissimilar metal laminate, such as a NiAl-based laminate or a TiAl-based laminate, is placed on the upper surface of the lower bulging mold 105. The upper bulging mold 107 assembles the upper and lower bulging molds through the boss 113. Then, the furnace cover 104 is closed. At this time, the sealing ring 118 ensures a tight connection between the furnace body 103 and the furnace cover 104.

[0034] Then, the hydraulic cylinder 109 drives the pressure head 110 to push the piston mandrel 111, applying a clamping force to the surface of the upper bulging mold 107. This is achieved by two means: first, by compressing the nickel-based sealing gasket 106 to achieve a seal between the lower boss 108 and the lower bulging mold 105; and second, by the upper bulging mold 107 compressing the dissimilar metal laminate and plastically deforming it, a seal is achieved between it and the sealing groove 112 of the lower bulging mold 105.

[0035] Then, a vacuum of 1×10⁻⁶ is sequentially evacuated at the extraction port 115 using a mechanical pump and a molecular pump. -3 Pa;

[0036] Then, the silicon molybdenum rod heating element 117 is used to heat the material to the forming temperature and hold it thereafter.

[0037] Finally, the pressure is increased to 5-15 MPa through the inlet 114 connected to inert gas (argon, nitrogen); plastic deformation of the heterogeneous metal laminate is achieved. Different types of thin-walled components can be prepared by changing the upper bulging mold 107. After the forming is completed and the subsequent heat treatment process is finished, the clamping force is unloaded, the molecular pump and mechanical pump are turned off after cooling to room temperature, and the furnace cover 104 is opened to take out the formed component.

[0038] The advantages are that inexpensive graphite molds can be used in a vacuum environment, resulting in less surface oxidation of the formed components, higher forming quality, convenient operation, and easy sealing of the components.

[0039] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A vacuum high-temperature thin-walled component gas pressure bulging device, comprising a base and a support, wherein the support is fixedly connected to the base and is located on top of the base, characterized in that, It also includes molding components; The forming assembly includes a furnace body, a pressure member, a furnace cover, a lower bulging mold, a nickel-based sealing gasket, and an upper bulging mold. The furnace body has a lower boss located inside the furnace body. The furnace cover is located at the top of the furnace body. The lower bulging mold is located above the lower boss. The nickel-based sealing gasket is located between the lower bulging mold and the lower boss. The upper bulging mold is located at the top of the lower bulging mold. The pressure member is connected to the furnace cover and the support respectively.

2. The vacuum high-temperature thin-walled component gas pressure bulging device as described in claim 1, characterized in that, The pressure component includes a hydraulic cylinder, a pressure head, and a piston mandrel. The hydraulic cylinder is fixedly connected to the bracket and is located on the side of the bracket away from the base. The pressure head is fixedly connected to the output end of the hydraulic cylinder. The piston mandrel is slidably connected to the furnace cover and corresponds to the pressure head.

3. The vacuum high-temperature thin-walled component gas pressure bulging device as described in claim 1, characterized in that, The lower bulging mold has a sealing groove located on the side of the lower bulging mold close to the upper bulging mold; the upper bulging mold has a boss located on the side of the upper bulging mold close to the lower bulging mold.

4. The vacuum high-temperature thin-walled component gas pressure bulging device as described in claim 1, characterized in that, The furnace body has an air inlet and an air outlet, with the air outlet located on one side of the furnace body; the air inlet is located on the side of the furnace body away from the air outlet and is connected to the lower bulging mold.

5. The vacuum high-temperature thin-walled component gas pressure bulging device as described in claim 3, characterized in that, The lower mold also has a conical vent, which is located on the side of the lower mold near the lower boss.

6. The vacuum high-temperature thin-walled component gas pressure bulging device as described in claim 1, characterized in that, The vacuum high-temperature thin-walled component gas pressure expansion device also includes a silicon molybdenum rod heating element, which is located inside the furnace body.

7. The vacuum high-temperature thin-walled component gas pressure bulging device as described in claim 1, characterized in that, The forming assembly also includes a sealing ring located between the furnace body and the furnace cover.

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