Vacuum welding device for thin-wall waveguide products

Abstract

The utility model provides a thin-wall waveguide product vacuum welding device which comprises a vacuum brazing furnace and a jig mechanism used for fixing an upper cover plate, a lower cover plate and a middle cavity plate in a thin-wall waveguide, the jig mechanism comprises a bottom plate, an upper pressing plate and a lower pressing plate, a plurality of first supporting blocks are arranged on the bottom plate, and a plurality of second supporting blocks are arranged on the lower pressing plate. The first supporting block corresponds to a hole in the lower cover plate; the lower pressing plate is provided with a second supporting block, the upper pressing plate is provided with a third supporting block, the second supporting block corresponds to the groove in the upper cover plate, the third supporting block corresponds to the second supporting block, the second supporting block is provided with a through groove, and the third supporting block penetrates through the through groove in the second supporting block and then makes contact with the cross beam of the middle cavity plate. According to the utility model, the technical problem that the welding quality is reduced due to the fact that the non-pressed position of the middle cavity plate is still easy to slightly deform due to the absence of a fixing structure at the hole positions of the middle cavity plate, the upper cover plate and the lower cover plate in the prior art can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of waveguide welding equipment, in particular to a vacuum welding device for thin-wall waveguide products. Background Art

[0002] Waveguide slot antennas are gaps in metal cavities or waveguide walls to radiate and receive electromagnetic waves. Usually, metal cavities are welded. Since the waveguide cavity wall is only 1mm thick and the welds are all on the end faces of the waveguide wall, it is easy to cause the mesh solder to be dislocated and fall off during assembly welding. Moreover, it cannot be detected before assembly welding, which may lead to defects such as poor brazing seams, unfilled gaps, pores, slag inclusions, cracks, and mesh solder loss, which will affect the waveguide cavity and thus the waveguide performance.

[0003] See also Figure 1 and Figure 2 The thin-walled waveguide mainly consists of three components, namely, an upper cover plate, a lower cover plate and an intermediate cavity plate; the upper cover plate and the lower cover plate are respectively arranged on both sides of the intermediate cavity plate and fixed together by welding; however, due to the thin thickness of the upper cover plate, the lower cover plate and the intermediate cavity plate, the thermal stress generated during the welding process can easily lead to deformation, especially when lead soldering is performed in a vacuum environment, the deformation problem is more prominent due to the influence of temperature gradient and residual stress.

[0004] In order to control welding deformation, the method of welding from both sides simultaneously or alternately is usually adopted. This can ensure a more uniform temperature distribution during welding and reduce deformation caused by local overheating or cooling. There are special welding devices available for welding deformation control of thin-walled waveguide products such as vacuum lead soldering. These devices usually include precision fixtures, positioning systems and welding control systems. The fixture is used to fix and support the waveguide product to ensure its stability during the welding process; the positioning system is used to accurately control the welding position and angle; the welding control system is responsible for controlling welding parameters such as welding temperature, time and pressure.

[0005] The utility model with application number: CN202122656279.7 discloses a thin-wall brazing structure of a waveguide slot antenna, comprising a first sub-array shell, a second sub-array shell docked with the first sub-array shell, and a mesh brazing material; a groove is provided at the docking point of the first sub-array shell and the second sub-array shell, and the mesh brazing material is located in the groove, and the mesh brazing material brazes the first sub-array shell and the second sub-array shell together. The utility model has the advantage that all the mesh brazing materials are laid at one time, reducing the brazing process, and at the same time solves the problem that the mesh brazing material is easy to fall off during the vacuum brazing of magnesium-lithium alloy thin walls.

[0006] However, in actual use, if only clamping is used to achieve clamping and fixing, since there is no fixed structure at the hole positions of the middle cavity plate and the upper cover plate and the lower cover plate, the position where the middle cavity plate is not pressed is still prone to slight deformation, resulting in reduced welding quality. Utility Model Content

[0007] The purpose of the utility model is to provide a vacuum welding device for thin-walled waveguide products, which can effectively solve the technical problem in the prior art that due to the lack of a fixed structure at the hole positions of the intermediate cavity plate and the upper cover plate and the lower cover plate, the position where the intermediate cavity plate is not pressed is still prone to slight deformation, resulting in reduced welding quality.

[0008] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0009] A vacuum welding device for thin-walled waveguide products, including a vacuum brazing furnace, the utility model also includes a fixture mechanism for fixing an upper cover plate, a lower cover plate and an intermediate cavity plate in the thin-walled waveguide;

[0010] The fixture mechanism includes a bottom plate, an upper pressing plate and a lower pressing plate, and a plurality of first support blocks are arranged on the bottom plate, and the first support blocks correspond to the holes on the lower cover plate;

[0011] A second support block is arranged on the lower pressing plate, and a third support block is arranged on the upper pressing plate. The second support block corresponds to the groove on the upper cover plate, and the third support block corresponds to the second support block. The second support block has a through slot, and the third support block contacts the crossbeam of the middle cavity plate after passing through the through slot on the second support block;

[0012] A guide post is arranged on the bottom plate, and the guide post passes through the thin-walled waveguide, the upper cover plate and the lower cover plate, and is connected with a nut to press and fix the lower pressing plate; the upper pressing plate is connected to the bottom plate by bolts.

[0013] The first support block is in a stepped structure, and the stepped surface on the first support block contacts the lower surface of the lower cover plate.

[0014] Furthermore, a clearance gap is arranged on the side surface of the upper pressing plate, and the guide post passes through the clearance gap.

[0015] Preferably, a first extension portion is provided on the side of the base plate, a second extension portion is provided on the side of the upper pressure plate at a position corresponding to the position of the first extension portion of the base plate, a bolt is fixedly provided on the first extension portion, a through hole is provided on the second extension portion, and the bolt is connected to the locking nut after passing through the through hole.

[0016] Furthermore, the upper end of the first support block passes through the rear surface of the lower cover plate and contacts the middle cavity plate.

[0017] Preferably, the bottom surface of the base plate is provided with crisscross reinforcing ribs.

[0018] Furthermore, a positioning block is arranged on the bottom plate, and the positioning block is in an L-shaped structure.

[0019] Wherein, a guiding surface is arranged on the positioning block.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The utility model is mainly used to realize the welding of thin-walled waveguide products. In actual use, the lower cover plate, the middle cavity plate and the upper cover plate are placed on the bottom plate in sequence, and solder is placed in the welding area. Under the action of the guide column, the lower cover plate, the middle cavity plate and the upper cover plate are limited. The lower cover plate contacts with the first support block to realize the support of the lower cover plate. The second support block on the lower pressure plate passes through the upper cover plate, so that the lower pressure plate contacts with the upper cover plate and is fixed by the guide column and the nut so that the lower pressure plate and the bottom plate clamp the lower cover plate, the middle cavity plate and the upper cover plate. The upper plate is fixed with bolts, and the third support block on the upper plate passes through the through slot on the second support block and contacts the cross beam of the middle cavity plate, so as to press and fix the middle cavity plate again. At the same time, the first support block on the bottom plate contacts the middle cavity plate to support the lower surface of the middle cavity plate. This arrangement can support the lower cover plate, the middle cavity plate and the upper cover plate, avoids the situation that the position that is not pressed is still prone to slight deformation, and effectively solves the technical problem of reduced welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of a thin-walled waveguide product in the prior art.

[0024] Figure 2 for Figure 1 Schematic diagram of the explosion.

[0025] Figure 3 This is a schematic diagram of the utility model in use.

[0026] Figure 4 This is a schematic diagram of the connection relationship between the positioning block and the base plate of the utility model.

[0027] Figure 5It is a schematic diagram of the matching relationship between the upper pressing plate and the lower pressing plate of the utility model.

[0028] Reference numerals:

[0029] 101 thin-walled waveguide, 102 upper cover plate, 103 lower cover plate, 104 middle cavity plate, 105 bottom plate, 106 upper pressure plate, 107 lower pressure plate, 108 first support block, 109 second support block, 110 third support block, 111 groove, 112 crossbeam, 113 guide column, 114 bolt, 115 clearance gap, 116 first extension part, 117 second extension part, 118 reinforcing rib, 119 positioning block, 120 guide surface. DETAILED DESCRIPTION

[0030] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0031] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", 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 the embodiments of the present invention 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 embodiments of the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0034] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0036] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0037] See also Figure 1-Figure 5 This embodiment discloses a fixture mechanism for fixing the upper cover plate 102, the lower cover plate 103 and the middle cavity plate 104 in the thin-walled waveguide 101.

[0038] The fixture mechanism includes a bottom plate 105, an upper pressing plate 106 and a lower pressing plate 107. A plurality of first support blocks 108 are provided on the bottom plate 105. The first support blocks 108 correspond to the holes on the lower cover plate 103.

[0039] A second support block 109 is provided on the lower pressing plate 107, and a third support block 110 is provided on the upper pressing plate 106. The second support block 109 corresponds to the groove 111 on the upper cover plate 102, and the third support block 110 corresponds to the second support block 109. The second support block 109 has a through slot, and the third support block 110 passes through the through slot on the second support block 109 and contacts the crossbeam 112 of the middle cavity plate 104;

[0040] A guide post 113 is provided on the bottom plate 105 , and the guide post 113 passes through the thin-walled waveguide 101 , the upper cover plate 102 and the lower cover plate 103 , and is connected with a nut to press and fix the lower pressing plate 107 ; the upper pressing plate 106 is connected to the bottom plate 105 by bolts 114 .

[0041] The utility model is mainly used to realize the welding of thin-walled waveguide 101 products. In actual use, the lower cover plate 103, the middle cavity plate 104 and the upper cover plate 102 are placed on the bottom plate 105 in sequence, and solder is placed in the welding area. Under the action of the guide column 113, the lower cover plate 103, the middle cavity plate 104 and the upper cover plate 102 are guided and limited. The lower cover plate 103 contacts the first support block 108 to support the lower cover plate 103. The second support block 109 on the lower pressing plate 107 passes through the upper cover plate 102, so that the lower pressing plate 107 is fixed by the guide column 113 and the nut after contacting the upper cover plate 102, so that the lower pressing plate 107 and the bottom plate 105 can connect the lower cover plate 103 and the middle cavity plate 1 04 and the upper cover plate 102 are clamped and fixed; at the same time, the upper pressure plate 106 and the bottom plate 105 are fixed by bolts 114. At this time, the third support block 110 on the upper pressure plate 106 passes through the through groove on the second support block 109 and contacts with the cross beam 112 of the middle cavity plate 104, so as to realize the re-pressing and fixing of the middle cavity plate 104; at the same time, the first support block 108 on the bottom plate 105 contacts with the middle cavity plate 104 to realize the support of the lower surface of the middle cavity plate 104. Such an arrangement can support the lower cover plate 103, the middle cavity plate 104 and the upper cover plate 102, and can avoid the situation that the position that is not pressed is still prone to slight deformation, and can effectively solve the technical problem of reduced welding quality.

[0042] Furthermore, in actual use, the first support block 108 has a stepped structure, and the stepped surface on the first support block 108 contacts the lower surface of the lower cover plate 103; since the holes on the lower cover plate 103 are very dense, the stepped first support block 108 can achieve multi-point support for the lower cover plate 103, so that a gap is formed between the lower cover plate 103 and the bottom plate 105, which facilitates heat transfer.

[0043] The upper side of the upper pressing plate 106 is provided with a clearance notch 115, and the guide column 113 passes through the clearance notch 115. The clearance notch 115 is used to achieve the purpose of clearance, so as to facilitate the cooperation between the nut and the guide column.

[0044] The bottom plate 105 has a first extension 116 on its side, the upper pressing plate 106 has a second extension 117 on its side corresponding to the first extension 116 of the bottom plate 105, the bolt 114 is fixedly mounted on the first extension 116, the second extension 117 has a through hole, and the bolt 114 passes through the through hole and is connected to a locking nut, so as to facilitate the connection between the upper pressing plate 106 and the bottom plate 105.

[0045] In actual use, after the upper end of the first support block 108 passes through the lower cover plate 103 , the surface contacts the middle cavity plate 104 .

[0046] Furthermore, the bottom surface of the bottom plate 105 is provided with crisscrossing reinforcing ribs 118 , and the provided reinforcing ribs 118 can improve the deformation resistance of the bottom plate 105 .

[0047] In some preferred implementation cases, a positioning block 119 is provided on the bottom plate 105, and the positioning block 119 is in an L-shaped structure. The L-shaped positioning block 119 can achieve the purpose of guidance, making it easy to pass the upper cover plate 102, the lower cover plate 103 and the middle cavity plate 104 through the guide column.

[0048] Furthermore, in actual use, a guide surface 120 is provided on the positioning block 119 .

[0049] In actual use, positioning blocks 119 may be provided at the four corners of the bottom plate 105 .

[0050] Furthermore, the present embodiment also discloses a welding device, specifically a vacuum welding device for a thin-walled waveguide 101 product, including a vacuum brazing furnace. The present embodiment also includes a fixture mechanism for fixing the upper cover plate 102, the lower cover plate 103 and the middle cavity plate 104 in the thin-walled waveguide 101; the vacuum brazing furnace is not drawn in the present embodiment, and the vacuum brazing furnace structure in the prior art can be adopted, and the fixture mechanism is any one of the fixture mechanisms described above.

[0051] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum welding device for thin-walled waveguide products, comprising a vacuum brazing furnace, characterized in that: Also included is a fixture mechanism for fixing an upper cover plate, a lower cover plate and an intermediate cavity plate in a thin-walled waveguide; The fixture mechanism includes a bottom plate, an upper pressing plate and a lower pressing plate, and a plurality of first support blocks are arranged on the bottom plate, and the first support blocks correspond to the holes on the lower cover plate; A second support block is arranged on the lower pressing plate, and a third support block is arranged on the upper pressing plate. The second support block corresponds to the groove on the upper cover plate, and the third support block corresponds to the second support block. The second support block has a through slot, and the third support block contacts the crossbeam of the middle cavity plate after passing through the through slot on the second support block; A guide post is arranged on the bottom plate, and the guide post passes through the thin-walled waveguide, the upper cover plate and the lower cover plate, and is connected with a nut to press and fix the lower pressing plate; the upper pressing plate is connected to the bottom plate by bolts.

2. A vacuum welding device for thin-walled waveguide products according to claim 1, characterized in that: The first support block has a stepped structure, and the stepped surface on the first support block contacts the lower surface of the lower cover plate.

3. A vacuum welding device for thin-walled waveguide products according to claim 1, characterized in that: A clearance notch is arranged on the side surface of the upper pressing plate, and the guide column passes through the clearance notch.

4. A vacuum welding device for thin-walled waveguide products according to claim 1, characterized in that: A first extension portion is provided on the side of the bottom plate, a second extension portion is provided on the side of the upper pressure plate at a position corresponding to the position of the first extension portion of the bottom plate, a bolt is fixedly provided on the first extension portion, a through hole is provided on the second extension portion, and the bolt is connected with the locking nut after passing through the through hole.

5. A vacuum welding device for thin-walled waveguide products according to claim 1, characterized in that: The upper end of the first supporting block passes through the rear surface of the lower cover plate and contacts the middle cavity plate.

6. A vacuum welding device for thin-walled waveguide products according to any one of claims 1 to 5, characterized in that: The bottom surface of the base plate is provided with crisscross reinforcing ribs.

7. A vacuum welding device for thin-walled waveguide products according to any one of claims 1 to 5, characterized in that: A positioning block is arranged on the bottom plate, and the positioning block is in an L-shaped structure.

8. A vacuum welding device for thin-walled waveguide products according to claim 7, characterized in that: The positioning block is provided with a guide surface.

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