A method for manufacturing a large thin-walled metal box

Abstract

The present application relates to a method for manufacturing a large thin-walled metal box, which includes the following steps: assembling and welding the first body and the second body respectively; supporting the first body and the second body on opposite sides of a supporting core mold; sealing and fixing the side wall structures on opposite sides of the first body and the second body, so that the first body and the second body are surrounded by the side wall structures on both sides to form a square frame; relieving the stress of the square frame as a whole; taking out the supporting core mold and processing the external interface of the square frame to complete the manufacture of the box. By assembling and welding the first body and the second body respectively, the manufacturing efficiency can be accelerated, and the first body and the second body are supported by the supporting core mold, and then the side wall structures on both sides of the square frame are installed, so that the manufacturing process of the large thin-walled metal box is simplified, and the technical problems of the manufacturing method used in the related technology that the process is complex, the processing efficiency is low, and it is difficult to form mass production are solved.

Description

Technical Field

[0001] The present application relates to the field of weapon equipment manufacturing, and in particular to a method for manufacturing a large thin-walled metal box. Background Art

[0002] High efficiency and low cost in weapon equipment manufacturing are prerequisites for mass production of products. The product's structural design and manufacturing technology are directly related to manufacturing efficiency and cost.

[0003] In the related art, the box bodies of some storage and transportation boxes are made of aluminum alloy materials, and the manufacturing method is to use small pieces of aluminum alloy plates to bend, shape, and weld them into a square cylinder, and then use aluminum alloy forged ribs to weld them on the cylinder. As the main component of the storage and transportation box, the box body is the main body of the components, with a complex structure and high precision requirements. However, the manufacturing method of directly using small pieces of aluminum alloy plates to bend, shape, and weld them into a square cylinder, and then use aluminum alloy forged ribs to weld them on the cylinder is complex, with low processing efficiency, and it is difficult to form mass production. Summary of the invention

[0004] The present application provides a method for manufacturing a large thin-walled metal box, which can solve the technical problem that in the related art, when manufacturing storage and transportation boxes, small pieces of aluminum alloy plates are bent, formed and welded into a square cylinder, and then aluminum alloy forged ribs are welded to the cylinder, which has a complex manufacturing process, low processing efficiency and is difficult to form large-scale production.

[0005] In the first aspect, an embodiment of the present application provides a method for manufacturing a large thin-walled metal box, which includes the following steps: assembling and welding a first body and a second body respectively; supporting the first body and the second body on opposite sides of a supporting core mold; sealing and fixing side wall structures on opposite sides of the first body and the second body so that the first body and the second body are surrounded by the side wall structures on both sides to form a square frame; relieving stress on the square frame as a whole; removing the supporting core mold and processing the external interface of the square frame to complete the manufacture of the box.

[0006] In combination with the first aspect, in one embodiment, the assembling and welding of the first body and the second body respectively include: assembling and welding two groups of cross beams and longitudinal beams respectively, so that one group of cross beams and longitudinal beams are assembled and welded to form a first frame, and the other group of cross beams and longitudinal beams are assembled and welded to form a second frame; installing a first skin on one side of the first frame to form a first body; and setting a second skin around the outer periphery of the second frame to form a second body.

[0007] In combination with the first aspect, in one embodiment, the first frame also includes a track beam, and the assembling and welding of the first body and the second body respectively include: fixing the track beam to the cross beam of the first frame respectively; bending the first skin corresponding to the track beam into a shape consistent with the contour of the track beam, so that the first skin cover is arranged on the inner side of the track beam; fixing a plurality of guide rail assembly mounting blocks on the first skin at positions corresponding to the track beam, and the plurality of guide rail assembly mounting blocks are arranged at intervals along the length direction of the track beam.

[0008] In combination with the first aspect, in one embodiment, the two groups of cross beams and longitudinal beams are assembled and welded respectively, so that one group of cross beams and longitudinal beams are assembled and welded to form a first frame, and the other group of cross beams and longitudinal beams are assembled and welded to form a second frame, including: fastening one side of some cross beams in one group with a locking seat, fixing stacking seats at both ends of the cross beam, and welding the cross beams and longitudinal beams of the group into the first frame; fixing welding seats at both ends of some cross beams in the other group, and assembling and welding the reorganized cross beams and longitudinal beams into the second frame.

[0009] In combination with the first aspect, in one embodiment, supporting the first body and the second body on opposite sides of the supporting core mold includes: placing the first body at a preset position and allowing the locking seat to support the first body; and processing the electrical interface and the core mold tooling installation interface in the first body based on the reference plane of the locking seat.

[0010] In combination with the first aspect, in one embodiment, the side wall structure includes a side skin and a reinforcing beam cooperating with the side skin, and the side wall structure is sealed and fixed on opposite sides of the first body and the second body, including: connecting the side edges of the opposite sides of the first body and the second body through the side skin respectively; and fixing the reinforcing beam by welding to the cross beams in the first frame and the second frame, so that the reinforcing beam is fixed to the outside of the side skin.

[0011] In combination with the first aspect, in one embodiment, fixing the reinforcing beam by welding to the cross beams in the first frame and the second frame includes: connecting the stacking seat and the welding seat by using the reinforcing beam.

[0012] In combination with the first aspect, in one embodiment, supporting the first body and the second body on opposite sides of the supporting core mold includes: calibrating a marking line on one side of the supporting core mold, and marking a matching line corresponding to the marking line on the first body; aligning the marking line with the matching line, and fixing the supporting core mold to the first body.

[0013] In combination with the first aspect, in one embodiment, relieving stress of the entire square frame includes: placing the square frame equipped with a supporting core mold in a tempering furnace with a preset temperature and time; after tempering is completed, cooling the square frame to a preset temperature along with the tempering furnace; and taking the square frame out of the tempering furnace for air cooling.

[0014] In combination with the first aspect, in one embodiment, after the square frame is taken out of the tempering furnace and air-cooled, the method includes: taking out the supporting core mold from the square frame and checking the air tightness of various parts of the square frame; and processing and opening an external interface on the periphery of the square frame.

[0015] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0016] By assembling and welding the first body and the second body separately first, the manufacturing efficiency can be accelerated, and the first body and the second body are supported by a supporting core mold, and then the side wall structures on both sides of the square frame are installed, so that the manufacturing process of the large thin-walled metal box is simplified, and the technical problem of using small pieces of aluminum alloy plates to be bent, formed and welded into a square cylinder, and then using aluminum alloy forged ribs to weld them on the cylinder in the related technology is solved. The manufacturing method is complex, the processing efficiency is low, and it is difficult to form large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of a manufacturing method according to an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of a three-dimensional structure of a support core mold and a square frame body connected to each other provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of a side view of the structure of the connection between the supporting core mold and the square frame provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of a three-dimensional structure in which a reinforcing beam provided in an embodiment of the present application connects a first body and a second body;

[0022] Figure 5 A schematic diagram of the three-dimensional structure of a square frame provided in an embodiment of the present application;

[0023] Figure 6 A schematic diagram of the structure of the first framework provided in an embodiment of the present application;

[0024] Figure 7 A schematic diagram of the structure of the second framework provided in the embodiment of the present application;

[0025] Figure 8A schematic diagram of the structure of the second body provided in an embodiment of the present application;

[0026] Fig. 9 A schematic diagram of the structure of a welding base provided in an embodiment of the present application;

[0027] Fig.10 A schematic diagram of the three-dimensional structure of the first body provided in an embodiment of the present application;

[0028] Fig.11 for Fig.10 A partial enlarged view of middle A;

[0029] Fig.12 for Fig.10 A partial enlarged view of B in the middle;

[0030] Fig.13 for Fig.10 A partial enlarged view of middle C;

[0031] Fig.14 for Fig.10 A partial enlarged view of middle D;

[0032] Fig.15 A schematic diagram of the structure of the locking seat provided in an embodiment of the present application.

[0033] In the figure:

[0034] 1. First body; 11. First frame; 12. First skin; 111. Track beam; 112. Guide rail assembly mounting block; 1121. Guide rail assembly mounting threaded hole; 13. Center block; 14. Matching line; 15. Electrical interface;

[0035] 2. Second body; 21. Second frame; 22. Second skin;

[0036] 3. Support the core mold;

[0037] 4. Side wall structure; 41. Side skin; 42. Reinforcement beam;

[0038] 5. Square frame;

[0039] 6. Beam; 61. Locking seat; 611. Locking interface; 62. Stacking seat; 63. Welding seat; 634. Fiber pulling hole; 64. Stacking interface; 65. Positioning hole;

[0040] 7. Longitudinal beam. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] The embodiment of the present application provides a method for manufacturing a large thin-walled metal box, which can solve the technical problem that in the related art, when manufacturing storage and transportation boxes, small pieces of aluminum alloy plates are bent, formed and welded into a square cylinder, and then aluminum alloy forged ribs are welded to the cylinder, which has a complex manufacturing process, low processing efficiency and is difficult to form large-scale production.

[0043] See also Figure 1 As shown, the embodiment of the present application provides a method for manufacturing a large thin-walled metal box, which may include the following steps:

[0044] S1: Assembling and welding the first body 1 and the second body 2 separately can enable the assembly and welding work of the first body 1 and the second body 2 to be performed simultaneously, thus saving working time.

[0045] S2: Support the first body 1 and the second body 2 on opposite sides of the supporting core mold 3. The size of the supporting core mold 3 can be set according to the actual required size of the large thin-walled metal box.

[0046] S3: The side wall structures 4 are sealed and fixed on both sides of the first body 1 and the second body 2 so that the first body 1 and the second body 2 are surrounded by the side wall structures 4 on both sides to form a square frame 5 .

[0047] S4: The square frame 5 is de-stressed as a whole. When the square frame 5 is de-stressed, the supporting core mold 3 can be always fixed on the inner wall of the square frame 5 .

[0048] S5: Take out the supporting core mold 3 and process the external interface of the square frame 5 to complete the manufacture of the box.

[0049] The embodiment of the present application can speed up the manufacturing efficiency by assembling and welding the first body 1 and the second body 2 separately first, the first body 1 and the second body 2 can be manufactured simultaneously, and the first body 1 and the second body 2 can be supported by the supporting core mold 3, and then the side wall structure 4 on both sides of the square frame 5 can be installed. At this time, the first body 1 and the second body 2 can be placed on the bottom and top surfaces of the supporting core mold 3 respectively, so that when the square frame 5 is manufactured, the supporting core mold 3 with a set size can be used to ensure the dimensional accuracy of the manufactured square frame 5. The above method can simplify the manufacturing process of large thin-walled metal boxes, and the supporting core mold 3 will be removed from the square frame 5 after the overall stress relief of a square frame 5, and used in the manufacturing of the next square frame 5, so that the accuracy of the square frames 5 manufactured in the same batch can be guaranteed under the action of the supporting core mold 3, which solves the technical problems of the related technology of using small pieces of aluminum alloy plates to be bent, formed and welded into square cylinders, and then using aluminum alloy forged ribs to weld them on the cylinders, which has complex process, low processing efficiency and is difficult to form large-scale production.

[0050] See also Figure 6 and Figure 7 As shown, in some optional embodiments, the first body 1 and the second body 2 are respectively assembled and welded, including: assembling and welding two groups of cross beams 6 and longitudinal beams 7, so that one group of cross beams 6 and longitudinal beams 7 are assembled and welded to form a first frame 11, and the other group of cross beams 6 and longitudinal beams 7 are assembled and welded to form a second frame 21. It should be understood that in the two groups of cross beams 6 and longitudinal beams 7 used for assembling and welding into the first frame 11 and the second frame 21, the length and number of the cross beams 6 and longitudinal beams 7 in one group may be the same as or different from the cross beams 6 and longitudinal beams 7 in the other group. In the embodiment of the present application, the lengths and numbers of the two groups of cross beams 6 and longitudinal beams 7 are set to be different; a first skin 12 is installed on one side of the first frame 11 to form the first body 1; see Figure 8 As shown, a second skin 22 is arranged around the outer periphery of the second frame 21 to form a second body 2, that is, in the embodiment of the present application, the first skin 12 is arranged only on one side of the first frame 11, and the outer periphery of the second frame 21 is surrounded by the second skin 22. In some other embodiments, the first frame 11 may also be surrounded by the first skin 12, or only one side of the second frame 21 may be provided with the second skin 22. Preferably, the first body 1 and the second body 2 have the same size. In some other embodiments, the first body 1 and the second body 2 may also have different sizes according to actual use requirements.

[0051] See also Fig.10As shown, in some optional embodiments, the first frame 11 also includes a track beam 111, and the first body 1 and the second body 2 are assembled and welded separately, including: fixing the track beam 111 to the cross beam 6 of the first frame 11 respectively, in the first body 1, two track beams 111 and multiple cross beams 6 can be welded together to form the first frame 11, the track beam 111 can be arranged along the extension direction of the first body 1, and during the extension process, the track beam 111 is welded and fixed to the multiple cross beams 6, the length of the track beam 111 can be the same as the longitudinal beam 7, or it can be shorter than the longitudinal beam 7. In the embodiment of the present application, two groups of track beams 111 are provided, and the length of each group of track beams 111 along the extension direction of the first body 1 is shorter than the longitudinal beam 7, one group of track beams 111 is set as a high guide rail, and the other group is set as a low guide rail. The high guide rail and the low guide rail can be arranged in the first frame 11 in sequence along the extension direction of the first body 1; the first skin is bent at the corresponding track beam 111 to be aligned with the track beam The shape consistent with the contour of the track beam 111 makes the first skin 12 cover the inner side of the track beam 111. It should be understood that the inner side here refers to the side of the cavity of the first body 1 close to the square frame 5 when the first body 1, the second body 2 and the side wall structure 4 together form a square frame 5. The first skin 12 is bent into a shape consistent with the contour of the track beam 111. The first skin 12 can be formed by pressing after the first skin 12 is covered on the first frame 11. In the embodiment of the present application, the first skin 12 is formed before the first frame 11 is installed, that is, the bending is completed according to the shape and size of the track beam 111. In the embodiment of the present application, a plurality of guide rail assembly mounting blocks 112 are fixed on the first skin 12 at positions corresponding to the track beam 111. The plurality of guide rail assembly mounting blocks 112 are arranged at intervals along the length direction of the track beam 111. In the embodiment of the present application, see Fig.11 and Fig.13 As shown, a guide rail assembly mounting threaded hole 1121 is provided in each guide rail assembly mounting block 112, and a guide rail assembly mounting block 112 having a guide rail assembly mounting threaded hole 1121 is fixed to the low guide rail and the high guide rail, and the distances between the guide rail assembly mounting blocks 112 in the low guide rail and the high guide rail along the length direction of the track beam 111 can be set to be different or the same.

[0052] In some optional embodiments, the two groups of cross beams 6 and longitudinal beams 7 are respectively assembled and welded, so that one group of cross beams 6 and longitudinal beams 7 are assembled and welded to form a first frame 11, and the other group of cross beams 6 and longitudinal beams 7 are assembled and welded to form a second frame 21, including: fastening one side of some cross beams 6 in one group with a locking seat 61, and fixing stacking seats 62 at both ends of the cross beam 6, and the cross beams 6 and longitudinal beams 7 of the group are welded into the first frame 11, see Fig.10 Fig.15As shown, in the embodiment of the present application, the cross beam 6 in the group can be divided into a locking beam and a first short beam. The width of the locking beam can be wider than that of the first short beam. The width here refers to the width of the locking beam and the first short beam along the extension direction of the first frame 11. A locking seat 61 is installed on one side of the locking beam. The side here can refer to the side of the locking beam away from the cavity of the square frame 5, and a locking beam can have one, two or more locking seats 61. A plurality of locking beams can be arranged in the first frame 11. The plurality of locking beams are arranged at intervals along the extension direction of the first frame 11. In the embodiment of the present application, two locking beams are arranged; the two ends of some cross beams 6 in the other group are fixed with welding seats 63, and the reorganized cross beams 6 and longitudinal beams 7 are assembled and welded into a second frame 21, see Fig. 9 As shown, the cross beam 6 in the group can be divided into a welding beam and a second short beam. There can also be multiple welding beams, which are arranged at intervals along the extension direction of the second frame 21. In the embodiment of the present application, there are also two welding beams.

[0053] See also Figures 2 to 5 As shown, in some optional embodiments, the first body 1 and the second body 2 are supported on opposite sides of the supporting core mold 3, including: placing the first body 1 at a preset position, and allowing the locking seat 61 to support the first body 1. In the embodiment of the present application, two locking beams with a locking seat 61 are used to support the first body 1 as a whole. At this time, the first body 1 can be placed stably at the preset position; the electrical interface 15 and the core mold tooling installation interface are processed in the first body 1 based on the reference plane of the locking seat 61. Preferably, before using the reference plane of the locking seat 61 as a reference, the locking seat 61 can also be processed. The lower plane, that is, the bottom surface of the locking seat 61, makes the bottom surfaces of all locking seats 61 located in the same plane. The reference plane of the locking seat 61 is used as a reference to ensure the flatness of the first body 1, so that the subsequent processing accuracy of the electrical interface 15 and the core mold tooling installation interface processed in the first body 1 can be better. In the embodiment of the present application, the above-mentioned guide rail assembly installation threaded hole 1121 can also be processed using the reference plane of the locking seat 61 as a reference at this time, and in some cases, the guide rail assembly installation threaded hole 1121 can be the same interface as the core mold tooling installation interface, or it can be a different interface. For further information, see Figure 6As shown, before the locking beam is used to assemble and weld the first frame 11, a positioning hole 65 can be opened at the bottom of the locking beam and the spacing between the locking seat 61. The positioning hole 65 can be used to place the first body 1 more accurately and quickly at the preset position, and in the subsequent use process, the positioning hole 65 can also be used to position the square frame 5. In addition, since the stacking seats 62 are installed at both ends of the locking beam, when the locking beam, the first short beam and the longitudinal beam 7 are welded together to form the first frame 11, the first skin 12 may be blocked by the stacking seat 62 when it is installed on the first skin 12. Therefore, an avoidance groove is opened in the first skin 12 to space the first skin 12 from the stacking seat 62. However, in the gap between the first skin 12 and the stacking seat 62, the gap between the first skin 12 and the stacking seat 62 can be sealed by continuous welding.

[0054] In some optional embodiments, the side wall structure 4 includes a side skin 41 and a reinforcing beam 42 matched with the side skin 41, and the side wall structure 4 is sealed and fixed on the opposite sides of the first body 1 and the second body 2, including: at this time, the first body 1 and the second body 2 are supported by the supporting core mold 3, and before the sides of the opposite sides of the first body 1 and the second body 2 are respectively connected through the side skin 41, a height ruler can be used to abut from the side of the first body 1 and the second body 2 to adjust the relative position of the first body 1 and the second body 2. After the adjustment is completed, the sides of the opposite sides of the first body 1 and the second body 2 are respectively connected through the side skin 41. It should be reasonable Solution: At this time, a supporting structure is also provided on the side of the supporting core mold 3 close to the side skin 41, and the side skin 41 can use the supporting structure to control its flatness when connecting the first body 1 and the second body 2; the reinforcing beam 42 is fixed to the outside of the side skin 41 by welding with the cross beams 6 in the first frame 11 and the second frame 21. In the embodiment of the present application, the cross beams 6 in the first frame 11 and the second frame 21 are arranged opposite to each other. After the cross beams 6 in the first frame 11 and the second frame 21 are connected by the reinforcing beams 42, each reinforcing beam 42 is perpendicular to the plane of the first body 1 and the second body 2. Installing the reinforcing beams 42 can enhance the stability of the square frame 5 structure.

[0055] In some optional embodiments, the reinforcing beam 42 is fixed by welding to the cross beam 6 in the first frame 11 and the second frame 21, including: using the reinforcing beam 42 to connect the stacking seat 62 and the welding seat 63, that is, in the embodiment of the present application, the stacking seat 62 and the welding seat 63 are arranged opposite each other, so that when the first body 1 and the second body 2 are abutted by a height ruler to adjust the relative position of the first body 1 and the second body 2, the position between the stacking seat 62 and the welding seat 63 can be used as a reference to make the positional relationship between the first body 1 and the second body 2 more accurate.

[0056] In some optional embodiments, the first body 1 and the second body 2 are supported on opposite sides of the supporting core mold 3, including: calibrating a marking line on one side of the supporting core mold 3, and marking a matching line 14 corresponding to the marking line on the first body 1. Preferably, the marking line in the first body 1 can be the center line of the first body 1, and the matching line 14 of the supporting core mold 3 can also be the center line of the supporting core mold 3; aligning the marking line with the matching line 14, and fixing the supporting core mold 3 to the first body 1, that is, after the first body 1 and the second body 2 are assembled and welded, the first body 1 can be placed in a preset position first, and then the supporting core mold 3 can be placed in the corresponding position of the first body 1 through the marking line and the matching line 14, and then the second body 2 can be placed on the top surface of the supporting core mold 3. See. Fig.12 and Fig.14 As shown, in the embodiment of the present application, a center block 13 may be opened in the beam 6 on which the locking seat 61 is installed, and a matching line 14 may be marked on the center block 13, and a matching line 14 may also be marked in the beam 6 at both ends of the first frame 11.

[0057] In some optional embodiments, the overall stress relief of the square frame 5 includes: placing the square frame 5 equipped with the supporting core mold 3 in a tempering furnace with preset temperature and time, the temperature in the tempering furnace can be set to 300°C~350°C, and the time is preset to 120min~150min; after tempering is completed, the square frame 5 is cooled to a preset temperature along with the tempering furnace, and the preset temperature is set to 200°C in the embodiment of the present application; and the square frame 5 is taken out of the tempering furnace for air cooling.

[0058] In some optional embodiments, after the square frame 5 is taken out of the tempering furnace and air-cooled, the following steps include: taking out the supporting core mold 3 from the square frame 5, and checking the air tightness of various parts of the square frame 5. The inspection method may be to first seal the holes that should be reserved in various parts of the square frame 5, and then inflate the interior of the box, check the leakage position and perform repair welding. It should be understood that the square frame 5 should be guaranteed to have a certain air tightness. Therefore, full welds are used at the parts that may affect the sealing performance of each component; external interfaces are processed on the periphery of the square frame 5. It should be understood that the external interfaces on the periphery of the square frame 5 may include a locking interface 611, a stacking interface 64, and a front and rear cover installation interface. The locking interface 611 can enable a large thin-walled metal box to be positioned with the target when in use. The platform can realize rapid positioning and locking; the stacking interface 64 can be correspondingly opened in the stacking seat 62 and the welding seat 63, so that the large thin-walled metal box can be more neatly placed when the stacking interface 64 is used to stack the items in the future, and the placement position can be more accurate. It should be noted that the stacking interface 64 should be opened as a blind hole. In addition, a fiber pulling hole 634 can also be opened on the welding seat 63; the opening of the front and rear cover installation interfaces can facilitate the subsequent use of the large thin-walled metal box, and the end covers can be quickly installed at both ends of the large thin-walled metal box; in the embodiment of the present application, the square frame 5 is processed after the stress relief is completed, and the accuracy of the opening position of each external interface on the large thin-walled metal box can be ensured for subsequent use.

[0059] Preferably, before assembling and welding the first body 1 and the second body 2, the materials required for subsequent use can be prepared first, such as the cross beam 6, the longitudinal beam 7 and each skin, etc. After the materials are prepared, sandblasting is performed on each surface to remove rust, oxide scale, oil stains, etc., so that each is cleaned and the pretreatment is completed. After the box body is machined, the surface treatment can be turned to, and the surface of the box body is cleaned first. After the cleaning is completed, the heat insulation coating, surface paint, etc. can be sprayed according to the functional requirements to complete the box body manufacturing.

[0060] It should be understood that the first body 1 and the second body 2 can be the top and bottom surfaces of a large thin-walled metal box, but can also be the two side surfaces of a large thin-walled metal box. The specific setting method is determined according to the setting position of the track beam 111 in the large thin-walled metal box.

[0061] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0062] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0063] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for manufacturing a large thin-walled metal box, characterized in that: It includes the following steps: Assembling and welding the first body (1) and the second body (2) respectively; The first body (1) and the second body (2) are supported on opposite sides of a supporting core mold (3); Side wall structures (4) are sealed and fixed on opposite sides of the first body (1) and the second body (2), so that the first body (1) and the second body (2) are surrounded by the side wall structures (4) on both sides to form a square frame (5); Relieving stress of the square frame (5) as a whole; The supporting core mold (3) is taken out and the external interface of the square frame (5) is processed to complete the manufacture of the box body; The step of assembling and welding the first body (1) and the second body (2) respectively comprises: The two groups of cross beams (6) and longitudinal beams (7) are respectively assembled and welded, so that one group of cross beams (6) and longitudinal beams (7) are assembled and welded to form a first frame (11), and the other group of cross beams (6) and longitudinal beams (7) are assembled and welded to form a second frame (21); A first skin (12) is installed on one side of the first frame (11) to form a first body (1); A second skin (22) is provided on the outer periphery of the second frame (21) to form a second body (2); The two groups of cross beams (6) and longitudinal beams (7) are respectively assembled and welded, so that one group of cross beams (6) and longitudinal beams (7) are assembled and welded to form a first frame (11), and the other group of cross beams (6) and longitudinal beams (7) are assembled and welded to form a second frame (21), comprising: One side of some cross beams (6) in one group is fastened by using a locking seat (61), and stacking seats (62) are fixed at both ends of the cross beams (6), and the cross beams (6) and longitudinal beams (7) of the group are welded into a first frame (11); Fixing welding seats (63) at both ends of some cross beams (6) in another group, assembling and welding the cross beams (6) and longitudinal beams (7) of the group into a second frame (21); The method of supporting the first body (1) and the second body (2) on opposite sides of a supporting core mold (3) comprises: Placing the first body (1) at a preset position, and allowing the locking seat (61) to support the first body (1); The electrical interface (15) and the core mold tooling installation interface are processed in the first body (1) based on the reference plane of the locking seat (61).

2. The method for manufacturing a large thin-walled metal box according to claim 1, characterized in that: The first frame (11) further comprises a track beam (111), and the first body (1) and the second body (2) are respectively assembled and welded, comprising: Fixing the track beam (111) to the cross beam (6) of the first frame (11) respectively; The first cover (12) is bent at a position corresponding to the track beam (111) into a shape consistent with the contour of the track beam (111), so that the first cover (12) covers the inner side of the track beam (111); A plurality of guide rail assembly mounting blocks (112) are fixed on the first skin (12) at positions corresponding to the track beam (111), and the plurality of guide rail assembly mounting blocks (112) are arranged at intervals along the length direction of the track beam (111).

3. The method for manufacturing a large thin-walled metal box according to claim 1, characterized in that: The side wall structure (4) comprises a side skin (41) and a reinforcing beam (42) matched with the side skin (41), and the side wall structure (4) is sealed and fixed on opposite sides of the first body (1) and the second body (2), and comprises: The side edges of the first body (1) and the second body (2) on opposite sides are respectively connected via side coverings (41); The reinforcing beam (42) is fixed to the first frame (11) and the cross beam (6) in the second frame (21) by welding, so that the reinforcing beam (42) is fixed to the outer side of the side skin (41).

4. The method for manufacturing a large thin-walled metal box according to claim 3, characterized in that: The method of fixing the reinforcing beam (42) by welding to the first frame (11) and the cross beam (6) in the second frame (21) comprises: The stacking seat (62) and the welding seat (63) are connected by using a reinforcing beam (42).

5. The method for manufacturing a large thin-walled metal box according to claim 1, characterized in that: The method of supporting the first body (1) and the second body (2) on opposite sides of a supporting core mold (3) comprises: Calibration of a marking line is performed on one side of the supporting core mold (3), and a matching line (14) corresponding to the marking line is marked on the first body (1); The marking line is aligned with the matching line (14), and the supporting core mold (3) is fixed to the first body (1).

6. The method for manufacturing a large thin-walled metal box according to claim 1, characterized in that: The whole square frame (5) is de-stressed, comprising: The square frame (5) equipped with the supporting core mold (3) is placed in a tempering furnace with a preset temperature and time; After tempering is completed, the square frame (5) is cooled to a preset temperature along with the tempering furnace; The square frame (5) is taken out of the tempering furnace and air-cooled.

7. The method for manufacturing a large thin-walled metal box according to claim 6, characterized in that: After the square frame (5) is taken out of the tempering furnace and air-cooled, the method comprises: The supporting core mold (3) is taken out from the square frame (5), and the air tightness of each part of the square frame (5) is checked; An external interface is machined on the outer periphery of the square frame (5).

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