Frame embedded type detachable welding tool

Abstract

The utility model belongs to the technical field of vacuum brazing, and particularly relates to an embedded frame type detachable welding tool which is used for supporting and clamping a box body in the brazing process and comprises an outer skin welding supporting plate, a clamp fixing bolt, a clamp fixing nut and a case inner wall supporting frame. Wherein the outer skin welding supporting plate and the case inner wall supporting frame are connected through the clamp fixing bolts and the clamp fixing nuts and then clamp the upper frame body or the lower frame body of the case body, the notches are designed in the supporting frame to avoid the situation that reinforcing ribs for improving the strength of parts are additionally arranged on the case parts, and therefore it is guaranteed that the tool is attached to the surfaces of the parts; and then the metal plate supporting plate is connected and fixed through the screws and the bolts, the phenomena of pseudo soldering, welding deformation, bulging and the like can be avoided, and the welding qualification rate is increased.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum brazing technology, specifically relating to an embedded frame-type detachable welding fixture. Background Technology

[0002] Air-cooled avionics products improve heat dissipation efficiency by vacuum brazing porous fins within an embedded frame. To enhance brazing penetration, the frame and skin for welding the porous fins are designed with a thickness of 0.8-1.2 mm. Reinforcing ribs are incorporated into the frame to enhance structural strength and rigidity. Therefore, using traditional flat fixtures for clamping can easily result in obstruction by the reinforcing ribs, preventing contact between the frame's bottom surface and the fixture. This leads to deformation and incomplete welds after welding, requiring rework, repair, or even scrapping the product. Utility Model Content

[0003] In view of this, the present invention provides an embedded frame-type detachable welding tool. By designing a notch on the support frame to avoid adding reinforcing ribs to the chassis parts to improve the strength of the parts, the tooling is ensured to fit the surface of the parts. Then, the sheet metal support plate is fixed by screws and bolts, which can avoid phenomena such as incomplete welding, welding deformation, and bulging, and improve the welding qualification rate.

[0004] The technical solution of this utility model is as follows:

[0005] An embedded frame-type detachable welding fixture is used for supporting and clamping a housing during the brazing process. The housing is a frame structure composed of four plate-shaped frames connected in a ring. The upper and lower opposing frames of the housing are both composed of parallel cold plates, perforated fins, and skin welded together. The inner surfaces of the opposing upper and lower frames are provided with reinforcing ribs. The welding fixture includes: an outer skin welding support plate, clamp fixing bolts, clamp fixing nuts, and an inner wall support frame of the housing. The outer skin welding support plate and the inner wall support frame of the housing are connected by clamp fixing bolts and clamp fixing nuts to clamp the upper or lower frame of the housing.

[0006] Alignment notches are reserved on the clamping surface of the outer skin welding support plate; the alignment notches are used to define the installation position of the support plate, and the installation position of the inner wall support frame of the chassis is connected to the outer skin welding support plate by the clamp fixing bolts and clamp fixing nuts to ensure accurate positioning.

[0007] Furthermore, both the outer skin welding support plate and the inner wall support frame of the chassis are sheet metal structural components; the outer skin welding support plate is provided with folded reinforcing ribs; and the inner wall support frame of the chassis has a Z-shaped structure.

[0008] Furthermore, when the welding fixture clamps the upper and lower frames of the box, the reinforcing rib is located within the clearance notch of the inner wall support frame.

[0009] Furthermore, the top surfaces of the multiple inner wall support frames that clamp one of the frames are in the same plane; the top surface of the inner wall support frame is the structural surface that is away from the outer skin welded support plate after clamping the frame.

[0010] Furthermore, when clamping the frame, the outer skin welded support plate is arranged parallel to the top surface of the inner wall support frame.

[0011] Furthermore, when supporting the frame, the outer skin welding support plate is attached to the skin of the frame.

[0012] Furthermore, the length of the inner wall support frame is greater than the length of the frame body, and when supporting the box body, both ends of the inner wall support frame protrude out of the frame structure;

[0013] Furthermore, the length of the outer skin welding support plate is greater than the length of the frame, and when supporting the box, both ends of the outer skin welding support plate protrude from the frame structure;

[0014] Furthermore, after the inner wall support frame and the outer skin welded support plate protrude from the frame structure through the clamp fixing bolts, they are connected in conjunction with the clamp fixing nut.

[0015] The beneficial effects of this utility model are:

[0016] 1) Tooling support plates and support frames can be manufactured using sheet metal processing, which is cheaper than other brazing methods. In addition, the tooling requires little space, which can increase the furnace loading capacity and processing efficiency.

[0017] 2) The tooling support plate and support frame are respectively designed with reinforced ribs and "U"-shaped structure, which can effectively improve the rigidity of the tooling and reduce the thermal deformation of the tooling during brazing.

[0018] 3) The tooling support plate and support frame are both made of stainless steel sheet. During the brazing process, the tooling has little impact on temperature transfer and brazing filler metal melting, the brazing filler metal is fully dissolved, and the fin welding effect is good.

[0019] 4) By leaving a notch on the inner wall support frame, ensure that the tooling and the surface of the welded parts fit together fully, and avoid post-weld defects such as incomplete welding, deformation, and bulging. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view of an embedded frame-type detachable welding fixture of this utility model;

[0022] Figure 2 This is a schematic diagram of the fin welding of this utility model;

[0023] Figure 3 This is a schematic diagram of the welded box body of this utility model;

[0024] Figure 4 This is an exploded view of an embedded frame-type detachable welding fixture of this utility model;

[0025] The components include: 1. Outer skin welding support plate; 2. Fixture fixing bolts; 3. Fixture fixing nuts; 4. Inner wall support frame of the chassis. Detailed Implementation

[0026] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0027] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0028] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0029] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this disclosure. The illustrations only show the components related to this disclosure and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0031] In one embodiment of this utility model, see reference Figures 1-4 An embedded frame-type detachable welding fixture is proposed, characterized in that it is used for supporting and clamping a box body during the brazing process; the box body is a frame structure composed of four plate-shaped frames connected in a ring in sequence, and the upper and lower opposing frames of the box body are both composed of parallel cold plates, perforated fins and skin welded together; the inner surfaces of the opposing upper and lower frames are provided with reinforcing ribs; the welding fixture includes: an outer skin welding support plate 1, a clamp fixing bolt 2, a clamp fixing nut 3, and a chassis inner wall support frame 4; wherein the outer skin welding support plate 1) and the chassis inner wall support frame 4 are connected by the clamp fixing bolt 2 and the clamp fixing nut 3 to clamp the upper or lower frame of the box body;

[0032] In this embodiment, an alignment notch is reserved on the clamping surface of the outer skin welding support plate 1; the alignment notch is used to define the installation position of the support plate, and the installation position of the inner wall support frame 4 of the chassis is connected to the outer skin welding support plate 1 by the clamp fixing bolt 2 and the clamp fixing nut 3 to ensure accurate positioning.

[0033] In this embodiment, both the outer skin welding support plate 1 and the chassis inner wall support frame 4 are sheet metal structural parts; the outer skin welding support plate 1 is provided with folded reinforcing ribs; and the chassis inner wall support frame 4 has a Z-shaped structure.

[0034] In this embodiment, when the upper and lower frames of the box are clamped by the welding fixture, the reinforcing rib is located within the clearance notch of the inner wall support frame.

[0035] In this embodiment, the top surfaces of the multiple inner wall support frames that clamp a frame are in the same plane; the top surface of the inner wall support frame is the structural surface that is away from the outer skin welded support plate 1 after clamping the frame.

[0036] In this embodiment, when the frame is clamped, the outer skin welding support plate 1 is arranged parallel to the top surface of the inner wall support frame.

[0037] In this embodiment, when supporting the frame, the outer skin welding support plate 1 is attached to the skin of the frame.

[0038] In this embodiment, the length of the inner wall support frame is greater than the length of the frame body, and when supporting the box body, both ends of the inner wall support frame protrude out of the frame structure;

[0039] In this embodiment, the length of the outer skin welding support plate 1 is greater than the length of the frame. When supporting the box, both ends of the outer skin welding support plate 1 protrude from the frame structure.

[0040] In this embodiment, after the inner wall support frame and the outer skin welded support plate 1 protrude from the frame structure through the clamp fixing bolt 2, they are connected with the clamp fixing nut 3.

[0041] In this embodiment, after installing the outer skin welding support plate 1 (2 pieces per set) and the inner wall support frame 4 (6 pieces per set) with clamp fixing bolts 2 (12 pieces per set) and clamp fixing nuts (12 pieces per set), do not tighten them immediately. After adjusting the outer skin welding support plate 1 (2 pieces per set) and the inner wall support frame 4 (6 pieces per set) to be flush with the housing (ensuring that the inner wall support frame has a reserved gap to avoid the reinforcing ribs), apply pre-tightening force to clamp them, thereby improving the welding qualification rate of the product.

[0042] In this embodiment, the outer skin welding support plate 1 (2 pieces per set) and the inner wall support frame 4 (6 pieces per set) are connected by clamp fixing bolts 2 (12 pieces per set) and clamp fixing nuts (12 pieces per set). In order to reduce deformation during the welding process and ensure the welding penetration rate of the fins, the outer skin welding support plate 1 (2 pieces per set) and the inner wall support frame 4 (6 pieces per set) need to be installed with clamp fixing bolts 2 (12 pieces per set) and clamp fixing nuts (12 pieces per set) but not tightened at first. After adjusting the outer skin welding support plate 1 (2 pieces per set) and the inner wall support frame 4 (6 pieces per set) to be flush with the housing, a preload force is applied to clamp them.

[0043] Necessary step-by-step feature descriptions:

[0044] After clamping, the product is placed in the furnace with the clamping solder flush with the bottom of the brazing furnace to prevent the solder from flowing downwards due to its own weight during the brazing process, which would affect the brazing penetration rate of the product.

[0045] During the tooling installation and clamping process, the installation positions of the support plate 1 (2 pieces per set) and the inner wall support frame 4 (6 pieces per set) are corrected by the reserved notch on the clamping surface of the support plate 1 (2 pieces per set). After correcting and ensuring that the reserved notch of the inner wall support frame avoids the installation of the reinforcing rib, the tooling is fixed and clamped.

[0046] The working principle of this embodiment is as follows: The installation position of the support plate 1 (2 pieces per set) and the inner wall support frame 4 (6 pieces per set) is corrected by the reserved notch on the clamping surface of the support plate 1 (2 pieces per set). The reserved notch on the inner wall support frame 4 avoids the addition of reinforcing ribs on the chassis parts to improve the strength of the parts, thereby ensuring that the tooling fits the surface of the parts. The preload is increased by tightening, which provides effective support for the parts during the brazing process and avoids the phenomenon of incomplete welding, deformation and bulging after welding.

[0047] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An embedded frame-type detachable welding fixture, characterized in that, Used for supporting and clamping the enclosure during the brazing process; the enclosure is a frame structure composed of four plate-shaped frames connected in a ring. The upper and lower opposing frames of the enclosure are both composed of parallel cold plates, perforated fins, and skin welded together; the inner surfaces of the opposing upper and lower frames are provided with reinforcing ribs; the welding fixture includes: an outer skin welding support plate, clamp fixing bolts, clamp fixing nuts, and an inner wall support frame of the enclosure; wherein the outer skin welding support plate and the inner wall support frame of the enclosure are connected by clamp fixing bolts and clamp fixing nuts to clamp the upper or lower frame of the enclosure; Alignment notches are reserved on the clamping surface of the outer skin welding support plate; the alignment notches are used to define the installation position of the support plate, and the installation position of the inner wall support frame of the chassis is connected to the outer skin welding support plate by the clamp fixing bolts and clamp fixing nuts to ensure accurate positioning.

2. The embedded frame-type detachable welding fixture according to claim 1, characterized in that, Both the outer skin welding support plate and the inner wall support frame of the chassis are sheet metal structural parts; the outer skin welding support plate is provided with folded reinforcing ribs; the inner wall support frame of the chassis has a Z-shaped structure.

3. The embedded frame-type detachable welding fixture according to claim 2, characterized in that, When the upper and lower frames of the box are clamped by the welding fixture, the reinforcing rib is located within the clearance notch of the inner wall support frame.

4. The embedded frame-type detachable welding fixture according to claim 3, characterized in that, The top surfaces of the multiple inner wall support frames that clamp one of the frames are in the same plane; the top surface of the inner wall support frame is the structural surface that is away from the outer skin welded support plate after clamping the frame.

5. The embedded frame-type detachable welding fixture according to claim 4, characterized in that, When clamping the frame, the outer skin welded support plate is arranged parallel to the top surface of the inner wall support frame.

6. The embedded frame-type detachable welding fixture according to claim 5, characterized in that, When supporting the frame, the outer skin welding support plate is attached to the skin of the frame.

7. The embedded frame-type detachable welding fixture according to claim 6, characterized in that, The length of the inner wall support frame is greater than the length of the frame body. When supporting the box body, both ends of the inner wall support frame protrude from the frame structure.

8. The embedded frame-type detachable welding fixture according to claim 7, characterized in that, The length of the outer skin welding support plate is greater than the length of the frame. When supporting the box, both ends of the outer skin welding support plate protrude from the frame structure.

9. The embedded frame-type detachable welding fixture according to claim 8, characterized in that, After the inner wall support frame and the outer skin welded support plate protrude from the frame structure through the clamp fixing bolts, they are connected with the clamp fixing nut.

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