Magnetic shielding cabin with spherical crown-cylindrical structure and manufacturing method thereof

Abstract

According to the magnetic shielding cabin with the spherical crown-cylindrical structure and the manufacturing method of the magnetic shielding cabin, the magnetic shielding effect is optimized, the construction cost is reduced, and the use space is increased. The capsule comprises a left hemispherical crown capsule body, a middle cylindrical capsule body and a right hemispherical crown capsule body, the middle cylindrical cabin body is positioned between the left hemispherical crown cabin body and the right hemispherical crown cabin body and comprises a left cylindrical cabin body and a right cylindrical cabin body; the left end of the left cylindrical cabin body is fixed at the right end of the left hemispherical crown cabin body to form a whole; a left staggered abutted seam is arranged at the right end of the left cylindrical cabin body, and the left staggered abutted seam is in a multi-step shape; the right end of the right cylindrical cabin body is fixed at the left end of the right hemispherical crown cabin body to form a whole; a right staggered abutted seam is arranged at the left end of the right cylindrical cabin body, and the right staggered abutted seam is in a multi-step shape; the left staggered abutted seam and the right staggered abutted seam are spliced and fixed together; the left hemispherical crown cabin body, the left cylindrical cabin body, the right cylindrical cabin body and the right hemispherical crown cabin body are all made of high-permeability materials.

Description

Technical Field

[0001] The invention relates to a magnetic shielding cabin body with a spherical cap-cylindrical structure and a manufacturing method thereof. Background Art

[0002] Magnetic fields are closely related to human life, but in some high-tech modern technology fields, magnetic fields have a significant impact on the normal operation of many devices. For example, in nuclear magnetic resonance imaging laboratories, interference from external magnetic fields (including the earth's magnetic field) will have a serious impact on the experimental results. Therefore, with the development of science and technology, many technical fields such as medicine, precision measurement, aerospace, and metrology testing require shielding of external interference magnetic fields to create a low residual magnetic environment. In this regard, magnetic shielding cabins are a type of technical equipment used to prevent magnetic field interference. They are widely used in aerospace, electronic communications, and medical fields to protect aircraft navigation and communication systems, radio equipment and communication base stations, nuclear magnetic resonance and other sensitive medical equipment from interference from external magnetic fields. Therefore, it is of great significance to design and develop a cabin structure that can effectively shield external magnetic fields.

[0003] The main working principle of the magnetic shielding cabin is to rely on high magnetic permeability materials as a shielding layer to absorb or disperse the external electromagnetic field. Its shape can be divided into many types, such as cuboid, sphere, cylinder, etc. In principle, the spherical shielding cabin is the most ideal shielding cabin shape. However, since the performance of high magnetic permeability alloy plates is greatly reduced after bending and deformation, and the forming process of curved plates is relatively complicated, most of the shielding cabins on the market are polyhedral chamber structures such as hexahedrons composed of flat high magnetic permeability plates. For example, Japan's "COSMOS" magnetic shielding room has very few cylindrical structures and basically no spherical structures. Although the more square the shape of the magnetic shielding cabin is, the lower the construction difficulty, but the worse the shielding effect. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a magnetic shielding cabin with a spherical cap-cylindrical structure and a manufacturing method thereof with a rationally designed structure, so as to optimize the magnetic shielding effect, reduce the construction cost and increase the use space.

[0005] The technical solution adopted by the present invention to solve the above problems is: a magnetic shielding cabin with a spherical crown-cylindrical structure, comprising a left hemispherical crown cabin, an intermediate cylindrical cabin and a right hemispherical crown cabin; the intermediate cylindrical cabin is located between the left hemispherical crown cabin and the right hemispherical crown cabin, and comprises a left cylindrical cabin and a right cylindrical cabin; the left end of the left cylindrical cabin is fixed to the right end of the left hemispherical crown cabin to form a whole; the right end of the left cylindrical cabin is provided with a left staggered seam, and the left staggered seam is in the shape of a multi-step step; the right end of the right cylindrical cabin is fixed to the left end of the right hemispherical crown cabin to form a whole; the left end of the right cylindrical cabin is provided with a right staggered seam, and the right staggered seam is in the shape of a multi-step step; the left staggered seam and the right staggered seam are spliced ​​and fixed together; the left hemispherical crown cabin, the left cylindrical cabin, the right cylindrical cabin and the right hemispherical crown cabin are all made of high magnetic permeability materials. The left cylindrical cabin body and the right cylindrical cabin body described in the present invention are both cylindrical.

[0006] The left hemispherical crown cabin body and the right hemispherical crown cabin body described in the present invention are both hemispherical.

[0007] The left staggered seams and the right staggered seams described in the present invention are both in the shape of three steps.

[0008] The left hemispherical crown cabin body, the left cylindrical cabin body, the right cylindrical cabin body and the right hemispherical crown cabin body of the present invention adopt a coaxial structure.

[0009] The left hemispherical cabin body, the left cylindrical cabin body, the right cylindrical cabin body and the right hemispherical cabin body described in the present invention are single-layer structures or multi-layer structures.

[0010] Each layer structure of the left hemispherical cabin body, the left cylindrical cabin body, the right cylindrical cabin body and the right hemispherical cabin body of the present invention is composed of a single plate, or is composed of a plurality of plates spliced ​​together.

[0011] The high magnetic permeability material of the present invention adopts 1J85 Permalloy.

[0012] A method for manufacturing a magnetic shielding cabin with a spherical cap-cylindrical structure, comprising the following steps: (1) The processing and manufacturing of magnetic shielding cabin components includes the following steps: (11) Cutting: Cutting the high magnetic permeability raw material sheet into sheets for stamping according to the actual areas and machining allowances of the left hemispherical crown cabin, the middle cylindrical cabin, and the right hemispherical crown cabin; (12) One-step hot stamping: After cutting, the sheet is heated to a certain temperature and then stamped on a punch press to obtain a one-step hot stamping sheet. (13) Secondary hot stamping: After the first hot stamping is completed, the first hot stamping sheet is put into the heating furnace again and heated to a certain temperature; the heated first hot stamping sheet is taken out, and the second hot stamping is completed on the punch press to obtain the second hot stamping sheet; (14) Mechanical processing: cooling the secondary hot stamping sheet to room temperature and performing mechanical processing to obtain a machined sheet; (15) Annealing: Finally, the machined sheet is heated to a certain temperature in the furnace, kept at this temperature for a certain period of time, and then cooled to room temperature with the furnace to complete the final low-temperature annealing; (2) The assembly of the magnetic shielding cabin includes the following steps: After the left hemispherical crown cabin, the middle cylindrical cabin and the right hemispherical crown cabin are manufactured, the left staggered seams and the right staggered seams are spliced ​​and fixed together to complete the manufacture of the magnetic shielding cabin with a spherical crown-cylindrical structure.

[0013] The left hemispherical crown cabin body and the left cylindrical cabin body of the present invention are an integral body formed by stamping; the right hemispherical crown cabin body and the right cylindrical cabin body can be an integral body formed by stamping.

[0014] Compared with the prior art, the present invention has the following advantages and effects: Based on production practice, the present invention improves the spherical shielding cabin and adopts a spherical cap-cylindrical chamber design, aiming to optimize the magnetic shielding effect, reduce construction costs and increase the use space. The shielding performance is better than the traditional hexahedral chamber structure and has obvious advantages in actual construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of a magnetic shielding cabin according to an embodiment of the present invention.

[0016] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0017] Figure 3 It is a flow chart of the manufacturing method of an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0019] 1. The magnetic shielding cabin of the embodiment of the present invention comprises a left hemispherical cabin 1, a middle cylindrical cabin and a right hemispherical cabin 4. The middle cylindrical cabin is located between the left hemispherical cabin 1 and the right hemispherical cabin 4, and comprises a left cylindrical cabin 2 and a right cylindrical cabin 3.

[0020] The left end circumference of the left cylindrical cabin body 2 is fixed on the right end circumference of the left hemispherical cabin body 1 to form a whole. The right end circumference of the left cylindrical cabin body 2 is provided with a left staggered seam 21, and the left staggered seam 21 is in the shape of multiple steps; the left cylindrical cabin body 2 is cylindrical, and the left hemispherical cabin body 1 is hemispherical. The right end circumference of the right cylindrical cabin body 3 is fixed on the left end circumference of the right hemispherical cabin body 4 to form a whole. The left end circumference of the right cylindrical cabin body 3 is provided with a right staggered seam 31, and the right staggered seam 31 is in the shape of multiple steps; the right cylindrical cabin body 3 is cylindrical, and the right hemispherical cabin body 4 is hemispherical. In this embodiment, the left staggered seam 21 and the right staggered seam 31 are both in the shape of three steps.

[0021] The left staggered seam 21 and the right staggered seam 31 are spliced ​​and fixed together, and an overlapping connection is formed by steps, which can greatly reduce the magnetic leakage of the cabin and facilitate assembly. In this way, the left hemispherical crown cabin 1, the left cylindrical cabin 2, the right cylindrical cabin 3 and the right hemispherical crown cabin 4 are connected into a whole. The left hemispherical crown cabin 1, the left cylindrical cabin 2, the right cylindrical cabin 3 and the right hemispherical crown cabin 4 adopt a coaxial structure, that is, the central axes of the four coincide. The coaxial structure not only obtains a better magnetic shielding effect, but also increases the volume of the internal space, and is also convenient for the layout and adjustment of the equipment inside the cabin.

[0022] The left hemispherical crown cabin body 1, the left cylindrical cabin body 2, the right cylindrical cabin body 3 and the right hemispherical crown cabin body 4 can be single-layer structures or multi-layer structures. Each layer of the structure can be composed of a single plate or a plurality of plates. The spliced ​​structure also adopts staggered seams to reduce magnetic leakage and facilitate assembly.

[0023] The left hemispherical crown cabin body 1, the left cylindrical cabin body 2, the right cylindrical cabin body 3 and the right hemispherical crown cabin body 4 are all made of high magnetic permeability material. The high magnetic permeability material is 1J85 Permalloy, which has both high magnetic permeability and machining performance. The raw material form of the high magnetic permeability material is cold-rolled plate. The thickness of the high magnetic permeability material can be selected in different sizes, preferably 0.5mm~5mm.

[0024] 2. A method for manufacturing a magnetic shielding cabin with a spherical cap-cylindrical structure, comprising the following steps: (1) Processing and manufacturing of magnetic shielding cabin components, including cutting, primary hot stamping, secondary hot stamping, machining, and annealing; (11) Cutting: According to the actual areas and processing allowances of the left hemispherical crown cabin body 1, the middle cylindrical cabin body and the right hemispherical crown cabin body 4, the high magnetic permeability raw material sheets are cut into sheets for stamping. The cutting method can be laser cutting, flame cutting, plasma cutting, etc.

[0025] (12) One-time hot stamping: After cutting, the plate is heated to a certain temperature and then stamped on a punch press to obtain a one-time hot stamping plate. When processing the left hemispherical crown cabin body and the right hemispherical crown cabin body, the punch head radius of the punch press is 2 mm to 3 mm larger than the spherical crown radius.

[0026] (13) Secondary hot stamping: After the first hot stamping is completed, the first hot stamping sheet is put into the heating furnace again and heated to a certain temperature; The heated primary hot stamping sheet is taken out, and secondary hot stamping is completed on a punch press to obtain a secondary hot stamping sheet; when the left hemispherical crown cabin body and the right hemispherical crown cabin body are processed, the punch head radius of the punch press is 1mm~2mm larger than the spherical crown radius.

[0027] Preferably, during the primary hot stamping process and the secondary hot stamping process, the temperature of the sheet is lower than the Curie point of the material, which may be 200°C to 500°C depending on the performance of the high magnetic permeability material.

[0028] (14) Mechanical processing: The secondary hot stamping sheet is cooled to room temperature and mechanically processed to obtain a machined sheet.

[0029] In the mechanical processing, the machined plates of the left cylindrical cabin body 2 and the right cylindrical cabin body 3 are processed to form respective staggered joints, and the staggered joints are obtained by cutting, and the cutting method adopts turning and grinding of CNC machine tools.

[0030] The bottom circumferences of the left hemispherical crown cabin body 1, the middle cylindrical cabin body and the right hemispherical crown cabin body 4 are obtained by cutting, and the cutting method is laser cutting.

[0031] (15) Annealing: Finally, the machined sheet is heated to a certain temperature in the furnace, kept at this temperature for a certain period of time, and then cooled to room temperature with the furnace to complete the final low-temperature annealing; (2) Splicing of magnetic shielding cabin; (21) When the four components of the left hemispherical crown cabin body 1, the left cylindrical cabin body 2, the right cylindrical cabin body 3 and the right hemispherical crown cabin body 4 are manufactured separately, the left hemispherical crown cabin body 1 and the left cylindrical cabin body 2 are fixed together, and the right hemispherical crown cabin body 4 and the right cylindrical cabin body 3 are fixed together. The connection can be made by integral structure, welding, bolt connection, riveting, gluing and other methods; The left hemispherical capsule body 1 and the left cylindrical capsule body 2 can be an integral body formed by stamping, and the right hemispherical capsule body 4 and the right cylindrical capsule body 3 can be an integral body formed by stamping.

[0032] (22) After the left hemispherical cap cabin 1, the middle cylindrical cabin and the right hemispherical cap cabin 4 are manufactured, the left staggered seams 21 and the right staggered seams 31 are spliced ​​and fixed together to complete the manufacture of the magnetic shielding cabin with a spherical cap-cylindrical structure.

[0033] This step may also include splicing of multiple plates of each layer on the left hemispherical cabin body 1, the middle cylindrical cabin body, and the right hemispherical cabin body 4. The splicing may be done by welding, bolting, riveting, gluing, and the like.

[0034] This step may also include the splicing of multiple layers of left hemispherical cabin bodies 1, the splicing of multiple layers of middle cylindrical cabin bodies, and the splicing of multiple layers of right hemispherical cabin bodies 4. The splicing may be done by surface connection methods such as gluing.

[0035] The left staggered seam 21 and the right staggered seam 31 can be fixed by welding, bolt connection, riveting, gluing and other methods.

[0036] The magnetic shielding cabin also uses a systematic support structure to ensure its stability and strength. The support frame is tightly fixed to the magnetic shielding cabin through welding, bolting and bonding. This design can not only effectively resist external vibration and stress, but also provide a stable working environment for the internal equipment.

[0037] In practical applications, a switch structure needs to be set to open or close the cabin to facilitate loading and unloading of equipment. Preferably, a switch can be set on the middle cylindrical cabin, and the switch can be a rotary switch, a push-button switch or an intelligent switch system. In addition, windows and holes can also be supported on the left hemispherical cabin 1 and the right hemispherical cabin 4 for installing pipes and lines.

[0038] 3. Embodiment 1: A small single-layer spherical cap-cylindrical structure magnetic shielding cabin and its manufacturing method.

[0039] When the magnetic shielding cabin is a small cabin, its structure and manufacturing process are simpler. This embodiment considers designing and manufacturing a small single-layer spherical crown-cylindrical structure magnetic shielding cabin for small biological and physical science experiments, the radius R of the left hemispherical crown cabin 1 and the right hemispherical crown cabin 4 is 0.5 m, and the height H of the middle cylindrical cabin is 0.4 m.

[0040] The thickness of the left hemispherical crown cabin 1, the middle cylindrical cabin and the right hemispherical crown cabin 4 can be selected according to specific needs, and can generally be between 0.5mm and 10mm. The choice of thickness will be affected by many factors, such as the magnetic field strength of the environment, the sensitivity of the equipment used, the manufacturing cost, etc. A thinner thickness may be more flexible and lightweight, suitable for occasions with lower requirements for magnetic field interference; while a thicker thickness is more durable and strong, suitable for occasions with higher requirements for magnetic field interference. However, due to the high manufacturing cost of high magnetic permeability, a thicker thickness will also significantly increase the construction cost of the magnetic shielding cabin. By selecting an appropriate thickness, the internal equipment can be effectively protected from the influence of the external magnetic field and the manufacturing cost can be controlled. Preferably, the thickness can be 1 mm, 3 mm, 5 mm and 8 mm, etc.

[0041] The left hemispherical crown cabin body 1, the middle cylindrical cabin body, and the right hemispherical crown cabin body 4 are all single-layer structures, and are all processed and manufactured from a single 3mm thick 1J85 Permalloy sheet. In this embodiment, the left hemispherical crown cabin body 1 and the left cylindrical cabin body 2 are integrally formed by stamping, and the right hemispherical crown cabin body 4 and the right cylindrical cabin body 3 are integrally formed by stamping.

[0042] The left staggered seam 21 and the right staggered seam 31 are both 1 mm high and 5 mm wide.

[0043] During the manufacturing process of the left hemispherical capsule 1 and the left cylindrical capsule 2 of this embodiment: (1) Cutting: According to the actual area and machining allowance of the left hemispherical crown cabin 1 and the left cylindrical cabin 2, 1J85 Permalloy is cut into circular plates for stamping. The cutting method can be laser cutting; (2) One-step hot stamping: After heating the circular plate to 260°C, stamping is completed on a punch press. The punch radius of the punch press is 2 mm larger than the radius of the spherical crown. (3) Secondary hot stamping: After the first hot stamping is completed, the first hot stamping sheet is put into the heating furnace again and heated to 260°C. When the second hot stamping is completed on the punch press, the punch radius is 2mm larger than the ball crown radius.

[0044] (4) Annealing: The machined plate is heated to 300°C in a furnace, kept at this temperature for a certain period of time, and then cooled to room temperature in the furnace to complete the final low-temperature annealing, thereby obtaining an integral finished product formed by the left hemispherical crown cabin body 1 and the left cylindrical cabin body 2.

[0045] The manufacturing process of the right hemispherical crown cabin body 4 and the right cylindrical cabin body 3 is consistent with the manufacturing process of the left hemispherical crown cabin body 1 and the left cylindrical cabin body 2, and will not be repeated.

[0046] By splicing and fixing the left staggered seam 21 and the right staggered seam 31 together, a small single-layer spherical cap-cylindrical structure magnetic shielding cabin can be obtained to obtain a low residual magnetic environment. After experimental testing, the cabin can achieve geomagnetic environment shielding to a central residual magnetic value of <200nT.

[0047] 4. Embodiment 2: A large multi-layered spherical-cylindrical structure magnetic shielding cabin and its manufacturing method.

[0048] When the volume of the magnetic shielding cabin is large, the hemispherical crown cabin and the cylindrical cabin are not suitable for being directly stamped from a shielding plate, but should be spliced ​​from multiple high magnetic permeability shielding arc-shaped plates. In this embodiment, the magnetic shielding cabin is formed by splicing a multi-layer hemispherical crown cabin and a multi-layer cylindrical cabin structure. The radius R of the left hemispherical crown cabin 1 and the right hemispherical crown cabin 4 is 5m, and the height H of the middle cylindrical cabin is 2.5m.

[0049] The left hemispherical crown cabin 1, the middle cylindrical cabin, and the right hemispherical crown cabin 4 are all three-layer structures, composed of multiple arc-shaped 1J85 Permalloy plates, and the 1J85 Permalloy plates are 2 mm thick. The left staggered joints 21 and the right staggered joints 31 also adopt a three-step structure, and the length of each step is 5 cm, 8 cm or 10 cm, respectively, to reduce magnetic leakage and facilitate assembly.

[0050] See also Figure 3 In the manufacturing process of the left hemispherical crown cabin body 1 and the right hemispherical crown cabin body 4 of this embodiment: (1) Cutting: According to the actual area and processing allowance of the left hemispherical crown cabin body 1 and the right hemispherical crown cabin body 4, 1J85 Permalloy is cut into circular plates for stamping. The cutting method can be laser cutting; (2) One-step hot stamping: After heating the circular plate to 260°C, stamping is completed on a punch press. The punch radius of the punch press is 3 mm larger than the radius of the spherical crown. (3) Secondary hot stamping: After the first hot stamping is completed, the first hot stamping sheet is put into the heating furnace again and heated to 260°C. When the second hot stamping is completed on the punch press, the punch radius is 2mm larger than the ball crown radius.

[0051] (4) Annealing: Heat the machined plate to 300°C in a furnace, keep it warm for a certain period of time, and then cool it to room temperature in the furnace to complete the final low-temperature annealing.

[0052] The manufacturing process of the left cylindrical cabin body 2 and the right cylindrical cabin body 3 is substantially the same as the manufacturing process of the left hemispherical crown cabin body 1 and the right hemispherical crown cabin body 4 described above, and will not be described again.

[0053] The connection between the left hemispherical crown cabin body 1 and the left cylindrical cabin body 2, and the connection between the right cylindrical cabin body 3 and the right hemispherical crown cabin body 4 are both connected by welding.

[0054] The splicing of each layer structure of the left hemispherical crown cabin body 1, the middle cylindrical cabin body and the right hemispherical crown cabin body 4 adopts a gluing surface connection method, and the splicing of the plates of each layer structure adopts a bolt connection method.

[0055] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A magnetic shielding cabin with a spherical cap-cylindrical structure, characterized in that: It includes a left hemispherical crown cabin, an intermediate cylindrical cabin and a right hemispherical crown cabin; the intermediate cylindrical cabin is located between the left hemispherical crown cabin and the right hemispherical crown cabin, and includes a left cylindrical cabin and a right cylindrical cabin; the left end of the left cylindrical cabin is fixed to the right end of the left hemispherical crown cabin to form a whole; the right end of the left cylindrical cabin is provided with a left staggered seam, and the left staggered seam is in a multi-step shape; the right end of the right cylindrical cabin is fixed to the left end of the right hemispherical crown cabin to form a whole; the left end of the right cylindrical cabin is provided with a right staggered seam, and the right staggered seam is in a multi-step shape; the left staggered seam and the right staggered seam are spliced ​​and fixed together; the left hemispherical crown cabin, the left cylindrical cabin, the right cylindrical cabin and the right hemispherical crown cabin are all made of high magnetic permeability materials.

2. The magnetic shielding cabin of the spherical cap-cylindrical structure according to claim 1 is characterized in that: The left cylindrical cabin body and the right cylindrical cabin body are both cylindrical.

3. The magnetic shielding cabin of the spherical cap-cylindrical structure according to claim 1, characterized in that: The left hemispherical crown cabin body and the right hemispherical crown cabin body are both hemispherical.

4. The magnetic shielding cabin of the spherical cap-cylindrical structure according to claim 1, characterized in that: The left staggered seams and the right staggered seams are both in the shape of three steps.

5. The magnetic shielding cabin of the spherical cap-cylindrical structure according to claim 1, characterized in that: The left hemispherical crown cabin body, the left cylindrical cabin body, the right cylindrical cabin body and the right hemispherical crown cabin body adopt a coaxial structure.

6. The magnetic shielding cabin of the spherical cap-cylindrical structure according to claim 1, characterized in that: The left hemispherical crown cabin body, the left cylindrical cabin body, the right cylindrical cabin body and the right hemispherical crown cabin body are single-layer structures or multi-layer structures.

7. The magnetic shielding cabin of the spherical cap-cylindrical structure according to claim 6, characterized in that: Each layer structure of the left hemispherical crown cabin body, the left cylindrical cabin body, the right cylindrical cabin body and the right hemispherical crown cabin body is composed of a single plate, or is composed of a plurality of plate pieces spliced ​​together.

8. The magnetic shielding cabin of the spherical cap-cylindrical structure according to claim 1, characterized in that: The high magnetic permeability material is 1J85 Permalloy.

9. A method for manufacturing a magnetic shielding cabin according to any one of claims 1 to 8, characterized in that: The following steps are involved: (1) The processing and manufacturing of magnetic shielding cabin components includes the following steps: (11) Cutting: Cutting the high magnetic permeability raw material sheet into sheets for stamping according to the actual areas and machining allowances of the left hemispherical crown cabin, the middle cylindrical cabin, and the right hemispherical crown cabin; (12) One-step hot stamping: After cutting, the sheet is heated to a certain temperature and then stamped on a punch press to obtain a one-step hot stamping sheet. (13) Secondary hot stamping: After the first hot stamping is completed, the first hot stamping sheet is put into the heating furnace again and heated to a certain temperature; the heated first hot stamping sheet is taken out, and the second hot stamping is completed on the punch press to obtain the second hot stamping sheet; (14) Mechanical processing: cooling the secondary hot stamping sheet to room temperature and performing mechanical processing to obtain a machined sheet; (15) Annealing: Finally, the machined sheet is heated to a certain temperature in the furnace, kept at this temperature for a certain period of time, and then cooled to room temperature with the furnace to complete the final low-temperature annealing; (2) The assembly of the magnetic shielding cabin includes the following steps: After the left hemispherical crown cabin, the middle cylindrical cabin and the right hemispherical crown cabin are manufactured, the left staggered seams and the right staggered seams are spliced ​​and fixed together to complete the manufacture of the magnetic shielding cabin with a spherical crown-cylindrical structure.

10. The manufacturing method according to claim 9, characterized in that: The left hemispherical crown cabin body and the left cylindrical cabin body are an integral body formed by stamping; the right hemispherical crown cabin body and the right cylindrical cabin body can be an integral body formed by stamping.

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