Electromagnetic assisted hot stamping die for rare earth magnesium alloy low-altitude UAV fairing

Abstract

This utility model relates to an electromagnetically assisted hot precision stamping die for a rare-earth magnesium alloy low-altitude UAV fairing. It includes a precision stamping die, a constant-temperature heater, an outer slider, a pressure ring, an inner slider, a capacitor assembly, and multiple electromagnetic forming coils. The precision stamping die supports a rare-earth magnesium alloy sheet and has a concave curved surface. Multiple constant-temperature heaters are installed in the precision stamping die, each positioned along the concave curved surface. The pressure ring is installed at the end of the outer slider near the precision stamping die, pressing the rare-earth magnesium alloy sheet firmly. The capacitor assembly is installed inside the inner slider, and the electromagnetic forming coils are installed at the end of the inner slider near the precision stamping die. The electromagnetic forming coils are electrically connected to the capacitor assembly via a coaxial cable. This die utilizes electromagnetic energy released by the electromagnetic forming coils to directly act on the rare-earth magnesium alloy sheet, eliminating die movement friction and enabling rapid plastic deformation, thus improving the accuracy of electromagnetic stamping and the quality of the fairing.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic fine stamping die technology, and in particular to an electromagnetic-assisted hot fine stamping die for a rare earth magnesium alloy low-altitude UAV fairing. Background Technology

[0002] With the rapid development of high-end manufacturing, low-altitude drones enable people to travel or transport at low altitudes. The fairing is a crucial component of aircraft (including low-altitude drones, flying cars, passenger planes, and launch vehicles), typically installed at the front, fuselage, wings, and propellers. It is essential for ensuring the flexibility of low-altitude aircraft, reducing air resistance, conserving battery energy, and protecting critical internal components such as servo motors, GPS positioning modules, cameras, radar, and IMU inertial measurement units.

[0003] As the lightweighting of precision components gains increasing attention, fairings made of rare-earth magnesium alloys offer advantages such as light weight, ease of thermoforming, and superior electromagnetic shielding, preventing signal interference for drones. Currently, rare-earth magnesium alloy fairings for low-altitude drones are generally formed through precision stamping. However, ordinary hot stamping dies are prone to annealing at 400-700℃, reducing the strength and rigidity of the die and resulting in disadvantages such as low stamping efficiency and low component precision. Utility Model Content

[0004] Therefore, it is necessary to provide an electromagnetic-assisted hot stamping die for a rare-earth magnesium alloy low-altitude UAV fairing to address the above problems.

[0005] An electromagnetically assisted hot precision blanking die for a rare-earth magnesium alloy low-altitude unmanned aerial vehicle (UAV) fairing includes a precision blanking die, a constant-temperature heater, an outer slider, a pressure ring, an inner slider, a capacitor assembly, and multiple electromagnetic forming coils. The precision blanking die is used to support the rare-earth magnesium alloy sheet and has a concave curved surface. Multiple constant-temperature heaters are installed on the precision blanking die, each arranged along the concave curved surface. The pressure ring is installed on one end of the outer slider near the precision blanking die and is used to press the rare-earth magnesium alloy sheet. The inner slider slides on the outer slider, the capacitor assembly is installed inside the inner slider, and the electromagnetic forming coils are installed on one end of the inner slider near the precision blanking die. The electromagnetic forming coils are electrically connected to the capacitor assembly via a coaxial cable.

[0006] In one embodiment, the fine blanking die, the outer slider, and the inner slider are all made of tungsten carbide.

[0007] In one embodiment, the properties of the fine blanking die, the outer slide block, and the inner slide block are: hardness HRC: 69-81, bending strength: 2000-4000 N / mm. 2 Bending strength: 3000-3500 N / mm 2 Compressive strength: 4000-4500 N / mm 2 .

[0008] In one embodiment, the system further includes a first driving power element and a second driving power element, wherein the first driving power element is used to drive the outer slider to slide, and the second driving power element is used to drive the inner slider to slide.

[0009] In one embodiment, the pressure ring is made of H13 hot work die steel.

[0010] In one embodiment, the pressure ring is provided with a relief hole to accommodate the inner slider.

[0011] In one embodiment, a plurality of insulating supports are further included, with the two ends of each insulating support respectively mounted on the two ends of the inner slider. The insulating supports are used to support the electromagnetic forming coil; each insulating support corresponds to one electromagnetic forming coil.

[0012] In one embodiment, a plurality of buffer pads are also included, the buffer pads being mounted on the insulating support, one end of the buffer pad abutting against the insulating support and the other end abutting against the electromagnetic forming coil.

[0013] In one embodiment, the buffer pad is an ultra-high temperature silicone rubber pad; the insulating support is made of high temperature glass fiber board.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The electromagnetic-assisted hot precision stamping die for the rare-earth magnesium alloy low-altitude UAV fairing of this utility model uses a pressure ring to press the rare-earth magnesium alloy sheet, and the electromagnetic energy released by the electromagnetic forming coil acts directly on the rare-earth magnesium alloy sheet. There is no friction from the die movement, which reduces the error caused by die wear and deformation, thereby improving the forming accuracy. Moreover, the electromagnetic energy released by the electromagnetic forming coil can make the rare-earth magnesium alloy sheet undergo rapid plastic deformation, improving forming efficiency and forming quality. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of an electromagnetic-assisted hot stamping die for a rare-earth magnesium alloy low-altitude UAV fairing, as shown in one embodiment of the present invention.

[0017] Figure 2 for Figure 1Enlarged view of center circle A;

[0018] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the insulating support in the electromagnetic-assisted hot stamping die for the rare-earth magnesium alloy low-altitude UAV fairing.

[0019] The meanings of the numbers in the attached diagram are as follows:

[0020] 100. Electromagnetic-assisted hot stamping die for rare earth magnesium alloy low-altitude UAV fairing;

[0021] 10. Fine blanking die; 20. Constant temperature heater; 30. Outer slide block; 40. Pressure ring; 50. Inner slide block; 60. Capacitor assembly; 70. Electromagnetic forming coil; 80. Insulating bracket; 81. Through hole; 90. Buffer pad; 90a. Rare earth magnesium alloy low-altitude UAV fairing. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Please refer to Figures 1 to 3An electromagnetic-assisted hot precision stamping die 100 for a rare-earth magnesium alloy low-altitude UAV fairing, according to one embodiment of the utility model, includes a precision stamping die 10, a constant-temperature heater 20, an outer slider 30, a pressure ring 40, an inner slider 50, a capacitor assembly 60, and multiple electromagnetic forming coils 70. The precision stamping die 10 is used to support the rare-earth magnesium alloy sheet. The precision stamping die 10 has a concave curved surface. The constant-temperature heaters 20 are installed on the precision stamping die 10. There are multiple constant-temperature heaters 20. The outer slider 30 is positioned along the concave surface of the fine blanking die 10; the pressure ring 40 is mounted on one end of the outer slider 30 near the fine blanking die 10, and the pressure ring 40 is used to press the rare earth magnesium alloy sheet; the inner slider 50 slides on the outer slider 30, the capacitor assembly 60 is mounted inside the inner slider 50, and the electromagnetic forming coil 70 is mounted on one end of the inner slider 50 near the fine blanking die 10, and the electromagnetic forming coil 70 is electrically connected to the capacitor assembly 60 via a coaxial cable. In one embodiment, the rare earth magnesium alloy sheet is WE43 rare earth magnesium alloy. In this embodiment, the electromagnetic-assisted hot stamping die 100 of the rare earth magnesium alloy low-altitude UAV fairing presses the rare earth magnesium alloy sheet with the pressure ring 40. The electromagnetic energy released by the electromagnetic forming coil 70 acts directly on the rare earth magnesium alloy sheet. There is no friction from the die movement, which reduces the error caused by die wear and deformation, thereby improving the forming accuracy. Moreover, the electromagnetic energy released by the electromagnetic forming coil 70 can make the rare earth magnesium alloy sheet undergo rapid plastic deformation, improving the electromagnetic forming efficiency and fairing quality.

[0029] like Figure 1 and Figure 2 As shown, in this embodiment, the fine blanking die 10 is used to support the rare earth magnesium alloy sheet. The fine blanking die 10 has a concave curved surface. The constant temperature heater 20 is installed on the fine blanking die 10. There are multiple constant temperature heaters 20, each arranged along the concave curved surface of the fine blanking die 10, to heat the fine blanking die 10 and ensure that the temperature of the rare earth magnesium alloy sheet is constant during hot fine blanking. In one embodiment, the pressure ring 40 is installed on one end of the outer slider 30 near the fine blanking die 10. The pressure ring 40 is used to press the rare earth magnesium alloy sheet to fix its position. The inner slider 50 slides on the outer slider 30. The capacitor assembly 60 is installed inside the inner slider 50. The electromagnetic forming coil 70 is installed on one end of the inner slider 50 near the fine blanking die 10. The electromagnetic forming coil 70 is electrically connected to the capacitor assembly 60 through a coaxial cable.

[0030] In one embodiment, the fine blanking die 10, the outer slider 30, and the inner slider 50 are all made of tungsten carbide, which has the following advantages: 1. High wear resistance, significantly extending the life of the hot fine blanking die; 2. High compressive strength and rigidity, ensuring the stability of forming accuracy; 3. Excellent dimensional stability, adapting to precision machining requirements; 4. High surface finish, improving the surface quality of stamped parts; 5. Corrosion resistance and oxidation resistance, adapting to complex working conditions; 6. High temperature resistance, tungsten carbide still has excellent hardness, strength, and thermal conductivity at 500℃, while the hot fine blanking temperature of rare earth magnesium alloys is 200-400℃. Therefore, tungsten carbide is very suitable for hot fine blanking of rare earth magnesium alloys. Optionally, the properties of the fine blanking die 10, the outer slider 30, and the inner slider 50 are: hardness HRC: 69-81, bending strength: 2000-4000 N / mm. 2 Bending strength: 3000-3500 N / mm 2 Compressive strength: 4000-4500 N / mm 2 Furthermore, the pressure ring 40 is provided with a clearance hole (not shown) to accommodate the inner slider 50; in one embodiment, the pressure ring 40 is made of H13 hot work die steel.

[0031] In one embodiment, the electromagnetic-assisted hot stamping die 100 of the rare earth magnesium alloy low-altitude UAV fairing further includes a first driving power element (not shown) and a second driving power element (not shown). The first driving power element is used to drive the outer slider 30 to slide; the second driving power element is used to drive the inner slider 50 to slide. Optionally, both the first driving power element and the second driving power element are servo motors, which is the prior art.

[0032] like Figure 2 and Figure 3 As shown, the electromagnetic-assisted hot stamping die 100 for the rare-earth magnesium alloy low-altitude UAV fairing also includes multiple insulating supports 80. The two ends of each insulating support 80 are respectively mounted on the two ends of the inner slider 50. The insulating supports 80 are used to support the electromagnetic forming coil 70; each insulating support 80 corresponds one-to-one with the electromagnetic forming coil 70. Optionally, the insulating support 80 has through holes 81 to accommodate the electromagnetic forming coil 70, and the bottom periphery of the electromagnetic forming coil 70 abuts against the insulating support 80. Further, the insulating support 80 is made of high-temperature fiberglass board, which has high strength and high temperature resistance; high-temperature fiberglass board is existing technology.

[0033] like Figure 2As shown, the electromagnetic-assisted hot stamping die 100 of the rare earth magnesium alloy low-altitude UAV fairing also includes multiple buffer pads 90. The buffer pads 90 are installed on the insulating support 80, with one end of the buffer pad 90 abutting against the insulating support 80 and the other end abutting against the electromagnetic forming coil 70. Optionally, the buffer pads 90 are ultra-high temperature silicone rubber pads, which is the prior art.

[0034] In use, a high-temperature resistant lubricant is applied to the fine blanking die 10. Optionally, the high-temperature resistant lubricant is Besrun magnesium alloy stamping oil. Then, a flat rare earth magnesium alloy sheet is placed on the fine blanking die 10, and the outer slider 30 slides down until the pressure ring 40 presses the rare earth magnesium alloy sheet. Next, the inner slider 50 descends to the processing position, the capacitor assembly 60 is energized, and the high-voltage current is transmitted to the electromagnetic forming coil 70 through the cable. The electromagnetic forming coil 70 releases electromagnetic energy to the rare earth magnesium alloy sheet, causing the rare earth magnesium alloy sheet to undergo precision stamping plastic deformation instantaneously (within 50-100μs). After multiple discharges, the rare earth magnesium alloy sheet is precisely plastically deformed into the shape of a low-altitude UAV fairing. The electromagnetic-assisted hot precision stamping die 100 for the rare earth magnesium alloy low-altitude UAV fairing has the following advantages: 1. Improves material plasticity and reduces forming defects; 2. Reduces forming force and equipment load; 3. Short stamping time and extends the life of the precision stamping die 10; 4. The electromagnetic forming process is highly flexible and adaptable to the forming of complex workpieces.

[0035] The electromagnetic-assisted hot stamping die 100 of the rare earth magnesium alloy low-altitude UAV fairing of this utility model presses the rare earth magnesium alloy sheet with the pressure ring 40. The electromagnetic energy released by the electromagnetic forming coil 70 acts directly on the rare earth magnesium alloy sheet. There is no friction from the die movement, which reduces the error caused by die wear and deformation, thereby improving the forming accuracy. Moreover, the electromagnetic energy released by the electromagnetic forming coil 70 can make the rare earth magnesium alloy sheet undergo rapid plastic deformation, improving forming efficiency and forming quality.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electromagnetically assisted hot stamping die for a rare-earth magnesium alloy low-altitude unmanned aerial vehicle (UAV) fairing, characterized in that, The device includes a fine blanking die, a constant temperature heater, an outer slide block, a pressure ring, an inner slide block, a capacitor assembly, and multiple electromagnetic forming coils. The fine blanking die is used to support a rare earth magnesium alloy sheet and has a concave curved surface. The constant temperature heater is installed on the fine blanking die, and there are multiple constant temperature heaters, each arranged along the concave curved surface of the fine blanking die. The pressure ring is installed on one end of the outer slide block near the fine blanking die and is used to press the rare earth magnesium alloy sheet. The inner slide block slides on the outer slide block, and the capacitor assembly is installed inside the inner slide block. The electromagnetic forming coils are installed on one end of the inner slide block near the fine blanking die and are electrically connected to the capacitor assembly via a coaxial cable.

2. The electromagnetic-assisted hot stamping die for the rare-earth magnesium alloy low-altitude UAV fairing according to claim 1, characterized in that, The fine blanking die, the outer slider, and the inner slider are all made of tungsten carbide.

3. The electromagnetic-assisted hot stamping die for the rare-earth magnesium alloy low-altitude UAV fairing according to claim 2, characterized in that, The properties of the fine blanking die, the outer slide block, and the inner slide block are as follows: hardness HRC: 69-81, bending strength: 2000-4000 N / mm. 2 Bending strength: 3000-3500 N / mm 2 Compressive strength: 4000-4500 N / mm 2 .

4. The electromagnetic-assisted hot stamping die for the rare-earth magnesium alloy low-altitude UAV fairing according to claim 1, characterized in that, It also includes a first driving power element and a second driving power element, wherein the first driving power element is used to drive the outer slider to slide; and the second driving power element is used to drive the inner slider to slide.

5. The electromagnetic-assisted hot stamping die for the rare-earth magnesium alloy low-altitude UAV fairing according to claim 1, characterized in that, The pressure ring is made of H13 hot work die steel.

6. The electromagnetic-assisted hot stamping die for the rare-earth magnesium alloy low-altitude UAV fairing according to claim 1, characterized in that, The pressure ring is provided with a clearance hole to accommodate the inner slider.

7. The electromagnetic-assisted hot stamping die for the rare-earth magnesium alloy low-altitude UAV fairing according to claim 1, characterized in that, It also includes multiple insulating supports, with each end of the insulating support being installed at both ends of the inner slider. The insulating supports are used to support the electromagnetic forming coil; each insulating support corresponds to one electromagnetic forming coil.

8. The electromagnetic-assisted hot stamping die for the rare-earth magnesium alloy low-altitude UAV fairing according to claim 7, characterized in that, It also includes multiple buffer pads, which are mounted on the insulating support, with one end of the buffer pad abutting against the insulating support and the other end abutting against the electromagnetic forming coil.

9. The electromagnetic-assisted hot stamping die for the rare-earth magnesium alloy low-altitude UAV fairing according to claim 8, characterized in that, The buffer pad is an ultra-high temperature silicone rubber pad; the insulating support is made of high temperature glass fiber board.

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