Vacuum brazing grading welding tool

Abstract

The utility model relates to the technical field of vacuum brazing, in particular to a vacuum brazing grading welding tool which comprises a base, a top cover is movably installed on the upper end face of the base, a clamping frame is fixedly installed on the top of the top cover, and the clamping frame is made of beryllium bronze materials. The middle section of the bottom of the clamping frame is welded to the upper end face of the top cover, the two sides of the clamping frame are bent downwards and make contact with the two sides of the upper end face of the base but are not fixedly connected with the two sides of the upper end face of the base, and manual push rods are fixedly installed on the two sides of the upper end face of the clamping frame respectively. And connecting rods are rotationally mounted at the ends, deviating from each other, of the two manual push rods correspondingly, and the ends, deviating from each other, of the two connecting rods are rotationally connected with the upper end face of the bent position of the clamping frame correspondingly. The magnesium alloy bar clamping and positioning device solves the problems that in the prior art, magnesium alloy bars are inconvenient to clamp and position, and control over the distance at the welding position is insufficient.

Description

Technical Field

[0001] This utility model relates to the field of vacuum brazing technology, specifically to a vacuum brazing graded welding fixture. Background Technology

[0002] Magnesium alloys are among the lightest engineering structural materials, characterized by low density and high specific strength. Magnesium alloy bars are widely used in the aerospace field due to their lightweight, high strength, good thermal conductivity, and corrosion resistance. They are used to manufacture critical structural components such as aircraft fuselage frames and engine parts to reduce aircraft weight and improve flight performance and fuel efficiency.

[0003] Extensive searches revealed CN213672336U, which discloses a stamping fixture for vacuum brazing of sleeve-type workpieces. The stamping fixture connects the workpiece and the pressure block through a central rod, ensuring that the fixture and the workpiece are aligned vertically. The pressure block presses the upper and lower surfaces of the workpiece's brazing area, preventing the inner sleeve from lifting the annular groove of the outer sleeve and affecting the brazing gap, thus improving the vacuum brazing quality of the workpiece.

[0004] However, existing devices are difficult to position and clamp when vacuum brazing magnesium alloy rods, and cannot position the distance between the weld joints of the two magnesium alloy rods after the filler metal is filled. Therefore, a vacuum brazing staged welding fixture is needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum brazing graded welding fixture, which has the advantage of clamping and positioning the magnesium alloy rods to be processed, thereby ensuring that the distance between the two magnesium alloy rods at the welding point remains unchanged. This solves the problems of the existing device being inconvenient to clamp and position the magnesium alloy rods and having insufficient control over the distance at the welding point.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vacuum brazing graded welding fixture, including a base, a top cover movably mounted on the upper surface of the base, a clamping frame fixedly mounted on the top of the top cover, the clamping frame being made of beryllium bronze, the bottom middle section of the clamping frame being welded to the upper surface of the top cover, the two sides of the clamping frame being bent downwards and contacting but not fixedly connected to the two sides of the upper surface of the base, and manual push rods being fixedly mounted on the two sides of the upper surface of the clamping frame;

[0007] Each of the two manual push rods has a connecting rod rotatably mounted at one end opposite to the other, and the two connecting rods are rotatably connected at one end opposite to the other to the upper end face of the bent part of the clamping frame.

[0008] Preferably, the base has an opening at its front end and a threaded sleeve is embedded therein, and a hinge is fixedly installed at the rear end of the upper surface of the base. The base is rotatably connected to the top cover via the hinge. This design, where the base is rotatably connected to the top cover via the hinge, allows the top cover to be opened or closed as needed, providing operational flexibility, while the hinge structure ensures the stability of the connection.

[0009] The threaded sleeve's embedded installation method allows the top cover to be quickly and securely connected to the base, facilitating rapid installation and disassembly and improving the tooling's work efficiency.

[0010] Preferably, the top cover has an opening on its upper surface and a filling tube is connected to it. The front end of the top cover has an eave and a mounting screw hole, and a positioning screw is installed in the internal thread of the mounting screw hole. The installation of the filling tube in this design allows for precise control of the filling position and amount of brazing filler metal, ensuring that the brazing filler metal can be uniformly and accurately filled into the welding area during the brazing process.

[0011] The use of an internal thread on the top of the inner wall of the injection tube, in conjunction with a sealing cap, ensures a tight seal during the welding process.

[0012] Preferably, the top of the inner wall of the injection tube is threaded with an internal thread and a sealing cap is threaded onto it. The inner diameter of the top of the inner wall of the injection tube is larger than the inner diameter of the bottom of the inner wall. The gradient design of the inner diameter of the injection tube makes it easier for the brazing filler metal to flow into the welding area through the injection tube during the brazing process, and also facilitates the recovery and cleaning of the brazing filler metal.

[0013] Preferably, the bottom of the positioning screw passes through the mounting screw hole and is threaded onto the inner side of the threaded sleeve, and the top of the positioning screw is provided with a rotating handle. In this design, the thread of the positioning screw is installed inside the threaded sleeve, providing precise positioning and ensuring the sealing and stability between the top cover and the base.

[0014] The rotating grip design at the top of the positioning screw allows the operator to easily position the top cover, improving operational convenience.

[0015] Preferably, the inner walls of the two bends of the clamping frame are provided with anti-slip textures parallel to the sides of the top cover. An adapter frame is fixedly installed on the upper surface of each of the two bends of the clamping frame. The end of the connecting rod opposite to the manual push rod is rotatably installed inside the adapter frame. A pre-drilled hole is provided in the middle of the top of the clamping frame. The clamping frame passes through the injection tube through the pre-drilled hole and is fixedly installed on the upper surface of the top cover. The anti-slip texture design on the inner wall of the clamping frame increases the friction between the clamping frame and the magnesium alloy rod, preventing the rod from slipping during welding and ensuring the accuracy and stability of the welding.

[0016] The design of fixed installation of the adapter frame and rotating installation of the connecting rod provides structural strength and flexibility, allowing the clamping frame to adapt to bars of different sizes, while facilitating adjustment and maintenance;

[0017] The design of the clamping frame passing through the injection tube through the reserved hole and being fixedly installed on the top cover realizes the integration of tooling, simplifies the structure, reduces the number of components, and improves the overall stability and ease of operation.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The clamping frame in this invention is made of beryllium bronze, which has high strength and good thermal conductivity, and can stably clamp magnesium alloy rods. The bottom middle section of the clamping frame is welded to the upper end face of the top cover, and the two sides are bent downwards and contact the upper end face of the base. This structural design allows the clamping frame to stably support the magnesium alloy rods, while allowing a certain degree of flexibility to adapt to rods of different sizes.

[0020] Manual push rods are fixedly installed on both sides of the upper end face of the clamping frame. Connecting rods are rotatably mounted on one end of each push rod, opposite to each other. This design allows the operator to adjust the position of the clamping frame's bends manually, thereby precisely positioning the spacing between the two magnesium alloy rods. The inner walls of the two bends of the clamping frame have anti-slip textures parallel to the sides of the top cover, increasing the friction between the clamping frame and the magnesium alloy rods, preventing slippage during welding, and ensuring welding accuracy and stability. The fixed installation of the adapter frame and the rotatable installation of the connecting rods provide structural strength and flexibility, allowing the clamping frame to adapt to rods of different sizes, while also facilitating adjustment and maintenance.

[0021] The base is rotatably connected to the top cover via hinges. This design allows the top cover to be opened or closed as needed, providing operational flexibility. At the same time, the hinge structure ensures the stability of the connection and facilitates the removal of the finished bar stock.

[0022] Through the above design, the tooling can effectively solve the problems of inconvenience in clamping and positioning magnesium alloy rods in the existing technology, and insufficient control of the spacing at the welding point, thereby improving the accuracy and stability of welding. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the base structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the top cover of this utility model;

[0026] Figure 4 This is a schematic diagram of the clamping frame structure of this utility model.

[0027] In the diagram: 1. Base; 11. Hinge; 12. Threaded sleeve; 2. Positioning screw; 3. Top cover; 31. Mounting screw hole; 32. Injection pipe; 33. Sealing cover; 4. Clamping frame; 41. Manual push rod; 42. Connecting rod; 43. Reserved hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, one embodiment of this utility model is provided: a vacuum brazing graded welding fixture, including a base 1, a top cover 3 movably installed on the upper end surface of the base 1, a clamping frame 4 fixedly installed on the top of the top cover 3, the clamping frame 4 is made of beryllium bronze, the bottom middle section of the clamping frame 4 is welded to the upper end surface of the top cover 3, the two sides of the clamping frame 4 are bent downwards and contact the two sides of the upper end surface of the base 1 but are not fixedly connected, and manual push rods 41 are fixedly installed on the two sides of the upper end surface of the clamping frame 4 respectively;

[0031] Two manual push rods 41 are rotatably mounted with connecting rods 42 at opposite ends. The opposite ends of the two connecting rods 42 are rotatably connected to the upper end face of the bend of the clamping frame 4.

[0032] Specifically, the clamping frame 4 is made of beryllium bronze, which has high strength and good thermal conductivity, and can stably clamp the magnesium alloy rod. The bottom middle section of the clamping frame 4 is welded to the upper end face of the top cover 3, and the two sides are bent downward and contact the upper end face of the base 1. This structural design allows the clamping frame 4 to stably support the magnesium alloy rod, while allowing a certain degree of flexibility to adapt to rods of different sizes.

[0033] Manual push rods 41 are fixedly installed on both sides of the upper end face of the clamping frame 4. Connecting rods 42 are rotatably mounted on one end of each of the two manual push rods 41, which are opposite to each other. This design allows the operator to adjust the position of the bent parts of the clamping frame 4 using the manual push rods 41, thereby precisely positioning the distance between the two magnesium alloy rods. The inner walls of the two bent parts of the clamping frame 4 have anti-slip textures parallel to the sides of the top cover 3, increasing the friction between the clamping frame 4 and the magnesium alloy rods, preventing the rods from slipping during welding, and ensuring the accuracy and stability of the welding. The fixed installation of the adapter frame and the rotatable installation of the connecting rods 42 provide structural strength and flexibility, allowing the clamping frame 4 to adapt to rods of different sizes, while also facilitating adjustment and maintenance.

[0034] The base 1 is rotatably connected to the top cover 3 via hinge 11. This design allows the top cover 3 to be opened or closed as needed, providing operational flexibility. At the same time, the hinge 11 structure ensures the stability of the connection and facilitates the removal of the finished bar.

[0035] Through the above design, the tooling can effectively solve the problems of inconvenience in clamping and positioning magnesium alloy rods in the existing technology, and insufficient control of the spacing at the welding point, thereby improving the accuracy and stability of welding.

[0036] Example 2

[0037] To improve the ease of opening and closing the top cover and base, thereby facilitating the removal of the finished bar stock, such as... Figure 2 and Figure 3 As shown, in this embodiment, a threaded sleeve 12 is embedded and installed at the front end of the base 1, and a hinge 11 is fixedly installed at the rear end of the upper surface of the base 1. The base 1 is rotatably connected to the top cover 3 through the hinge 11. The design of the base 1 being rotatably connected to the top cover 3 through the hinge 11 allows the top cover 3 to be opened or closed when needed, providing operational flexibility, while the structure of the hinge 11 ensures the stability of the connection.

[0038] The embedded installation method of the threaded sleeve 12 allows the top cover 3 to be quickly and securely connected to the base 1, facilitating rapid installation and disassembly and improving the working efficiency of the tooling.

[0039] Furthermore, the top cover 3 has an opening on its upper surface and a filling tube 32 is installed therethrough. The front end of the top cover 3 has an eave and a mounting screw hole 31. A positioning screw 2 is installed in the internal thread of the mounting screw hole 31. The installation of the filling tube 32 in the design allows for precise control of the filling position and amount of brazing filler metal, ensuring that the brazing filler metal can be filled into the welding area evenly and accurately during the brazing process.

[0040] The internal thread at the top of the inner wall of the injection tube 32, in conjunction with the sealing cap 33, ensures a tight seal during the welding process.

[0041] Furthermore, the top of the inner wall of the injection tube 32 is threaded with internal threads and a sealing cap 33 is threadedly installed thereon. The inner diameter of the top of the inner wall of the injection tube 32 is larger than the inner diameter of the bottom of the inner wall of the injection tube 32. The gradient design of the inner diameter of the injection tube 32 in the design makes it easier for the brazing filler metal to flow into the welding area through the injection tube 32 during the brazing process, and at the same time facilitates the recovery and cleaning of the brazing filler metal.

[0042] Furthermore, the bottom of the positioning screw 2 passes through the mounting screw hole 31 and is threaded onto the inside of the threaded sleeve 12, and the top of the positioning screw 2 is provided with a rotating handle. In this design, the thread of the positioning screw 2 is installed inside the threaded sleeve 12, providing a precise positioning function and ensuring the sealing and stability between the top cover 3 and the base 1;

[0043] The rotating grip design at the top of the positioning screw 2 allows the operator to easily position the top cover 3, improving the ease of operation.

[0044] Example 3

[0045] To facilitate adjustment of the bending section of the clamping frame and thus improve the stability of bar clamping, such as... Figure 4 As shown, in this embodiment, the inner walls of the two bends of the clamping frame 4 are provided with anti-slip textures parallel to the sides of the top cover 3. An adapter frame is fixedly installed on the upper surface of each of the two bends of the clamping frame 4. The end of the connecting rod 42 facing away from the manual push rod 41 is rotatably installed inside the adapter frame. A pre-drilled hole 43 is provided in the middle of the top of the clamping frame 4. The clamping frame 4 passes through the pre-drilled hole 43, passes through the injection tube 32, and is fixedly installed on the upper surface of the top cover 3. The anti-slip texture design on the inner wall of the clamping frame 4 increases the friction between the clamping frame 4 and the magnesium alloy rod, preventing the rod from sliding during welding and ensuring the accuracy and stability of the welding.

[0046] The fixed installation of the adapter frame and the rotating installation design of the connecting rod 42 provide structural strength and flexibility, allowing the clamping frame 4 to adapt to bars of different sizes, while facilitating adjustment and maintenance;

[0047] The design of the clamping frame 4 passing through the pre-drilled hole 43 through the injection tube 32 and being fixedly installed on the top cover 3 realizes the integration of tooling, simplifies the structure, reduces the number of components, and improves the overall stability and ease of operation.

[0048] When using this utility model, ensure all components are clean and free of contamination to avoid impurities during the welding process. Check all components of the tooling for damage, especially the beryllium bronze clamping frame 4, to ensure stability and safety during the welding process. Place the base 1 on the workbench and ensure its stability. Connect the top cover 3 to the base 1 using the hinge 11. Close the top cover 3 and the base 1 using the positioning screw 2. Fill the welding joint of the two magnesium alloy rods with brazing filler metal through the injection tube 32. After filling, install the sealing cover 33 and insert the two magnesium alloy rods to be welded into the inside of the base 1 on both sides. Cover the welding joint with the top cover 3 and the base 1. Pull the connecting rod 42 by manually pushing the push rod 41, so that the bent part of the clamping frame 4 contacts the magnesium alloy rod. The anti-slip texture increases the friction to ensure that the rod will not move during the welding process. At this time, move the device into the heating device and perform a vacuum operation. Then, start the heating equipment to heat the magnesium alloy rod until the temperature required for brazing is reached. After the welding is completed, turn off the heating equipment and let the welding area cool naturally or use a cooling system to accelerate the cooling process. Check the welding quality to ensure that there are no defects, such as cracks or pores. Once the welded part has cooled to room temperature, release the clamping frame 4 from the magnesium alloy rod, clean the welding area, remove excess brazing filler metal and possible impurities, and perform post-processing on the welded part as needed, such as grinding, polishing, or non-destructive testing, to ensure the quality of the welded part.

[0049] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vacuum brazing staged welding fixture, comprising a base (1), wherein a top cover (3) is movably mounted on the upper surface of the base (1), and a clamping frame (4) is fixedly mounted on the top of the top cover (3), characterized in that: The clamping frame (4) is made of beryllium bronze. The bottom middle section of the clamping frame (4) is welded to the upper end face of the top cover (3). The two sides of the clamping frame (4) are bent downwards and contact the two sides of the upper end face of the base (1) but are not fixedly connected. Manual push rods (41) are fixedly installed on the two sides of the upper end face of the clamping frame (4). Two manual push rods (41) are rotatably mounted with connecting rods (42) at opposite ends, and the opposite ends of the two connecting rods (42) are rotatably connected to the upper end face of the bent part of the clamping frame (4).

2. The vacuum brazing staged welding fixture according to claim 1, characterized in that, The base (1) has an opening at the front end and a threaded sleeve (12) is embedded therein. A hinge (11) is fixedly installed at the rear end of the upper surface of the base (1). The base (1) is rotatably connected to the top cover (3) through the hinge (11).

3. The vacuum brazing staged welding fixture according to claim 1, characterized in that, The top cover (3) has an opening on its upper end face and is connected to an injection pipe (32). The front end of the top cover (3) has an eave and an installation screw hole (31). The installation screw hole (31) is threaded with a positioning screw (2).

4. The vacuum brazing staged welding fixture according to claim 3, characterized in that, The top of the inner wall of the injection tube (32) is provided with an internal thread and a sealing cap (33) is threaded on it. The inner diameter of the top of the inner wall of the injection tube (32) is larger than the inner diameter of the bottom of the inner wall of the injection tube (32).

5. The vacuum brazing staged welding fixture according to claim 3, characterized in that, The bottom of the positioning screw (2) passes through the mounting screw hole (31) and is threaded onto the inside of the threaded sleeve (12). The top of the positioning screw (2) is provided with a rotating handle.

6. The vacuum brazing staged welding fixture according to claim 1, characterized in that, The inner walls of the two bends of the clamping frame (4) are provided with anti-slip textures parallel to the two sides of the top cover (3). The upper surfaces of the two bends of the clamping frame (4) are fixedly installed with adapters. The end of the connecting rod (42) facing away from the manual push rod (41) is rotatably installed in the adapter. The top center of the clamping frame (4) is provided with a reserved hole (43). The clamping frame (4) passes through the reserved hole (43) through the injection pipe (32) and is fixedly installed on the upper surface of the top cover (3).

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