Vacuum brazing tool

Abstract

The utility model discloses a vacuum brazing tool which comprises a tool bottom plate, and a positioning hole array is arranged on the surface of the tool bottom plate. The number of the clamp modules is at least one; the clamp module comprises a first clamp module, the first clamp module comprises a first base, and first bolt grooves are formed in the two sides of the first base; the second clamp unit comprises a connecting plate, the connecting plate is fixedly installed on the upper surface of the first base, a fixed clamping block and a movable clamping block are arranged at the top of the connecting plate, the fixed clamping block is fixedly connected with the connecting plate, the movable clamping block is arranged on the side, away from the connecting plate, of the fixed clamping block, and the movable clamping block is driven by a second adjusting part to move linearly. According to the utility model, the workpiece can be prevented from collapsing during brazing or in the process of feeding the workpiece into a brazing furnace, so that the welding quality is not influenced by the welding flux or the workpiece separation. At least one group of clamp modules are mounted corresponding to the positioning holes in different positions, so that the number and the position layout of the clamp modules are adjusted according to the actual brazing situation.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and in particular to a vacuum brazing fixture. Background Technology

[0002] In the field of vacuum brazing technology, precise and stable fixation of the workpiece is one of the key steps to ensure welding quality. Vacuum brazing, as a high-precision, high-quality welding method, is widely used in various industries such as aerospace, automotive manufacturing, and electronic components.

[0003] Currently, to ensure stable fixation of workpieces during vacuum brazing and avoid welding defects caused by workpiece movement, existing technologies generally employ specialized fixtures to hold and position the workpieces. These fixtures are typically custom-designed according to the specific dimensions and welding requirements of the workpiece to ensure that it remains stationary during welding. After the workpiece is fixed in place by the fixture, an appropriate amount of solder is applied, and the entire assembly is placed into a vacuum brazing furnace for high-temperature welding in a vacuum environment.

[0004] However, although existing fixtures and tooling meet the requirements for workpiece fixation in vacuum brazing to some extent, they still have significant limitations. Specifically, the layout of these fixtures and tooling is relatively fixed, resulting in low flexibility in use and making it impossible to adjust the fixture layout according to the actual brazing situation. Utility Model Content

[0005] Therefore, in order to overcome the above-mentioned shortcomings, this utility model provides a vacuum brazing fixture, which can prevent the workpiece from collapsing during brazing or during feeding into the brazing furnace, causing the solder to fail or the workpiece to separate, thus affecting the welding quality; at the same time, it improves the flexibility and applicability of the fixture.

[0006] Specifically, a vacuum brazing fixture includes:

[0007] A tooling base plate, on the surface of which is provided an array of positioning holes;

[0008] The clamping module is provided with at least one set; it is fixed to the tooling base plate by means of connecting bolts inserted into the preset positions and positioning holes of the at least one set of clamping modules.

[0009] The clamping module includes a first clamping module, which includes:

[0010] The first base has first bolt grooves on both sides. Connecting bolts are inserted into the first bolt grooves and positioning holes to fix the first base to the tooling base plate.

[0011] The second clamping unit includes a connecting plate, which is fixedly installed on the upper surface of the first base. A fixed clamping block and a movable clamping block are provided on the top of the connecting plate. The fixed clamping block is fixedly connected to the connecting plate, and the movable clamping block is located on the side of the fixed clamping block away from the connecting plate. The movable clamping block is driven to move linearly by the second adjustment part to move closer to or away from the fixed clamping block. V-shaped grooves are provided on the side of the fixed clamping block away from the connecting plate and the side of the movable clamping block close to the fixed clamping block.

[0012] Furthermore, the second adjustment part passes through the movable clamping block and is threadedly connected to the fixed clamping block.

[0013] This invention is applicable to the brazing and fixing of workpieces such as round pipes and cylindrical parts. One set of workpieces is placed on the upper surface of a first base, while another workpiece passes from top to bottom between a fixed clamping block and a movable clamping block. The workpiece positions are adjusted to ensure the two sets of workpieces are properly aligned. Solder is then applied. This prevents workpieces from collapsing during brazing or during loading into the brazing furnace, which could lead to solder failure or workpiece separation and affect welding quality. By setting a tooling base plate with an array of positioning holes, at least one set of clamping modules can be installed corresponding to the positioning holes at different positions. The number and layout of the clamping modules can be adjusted according to the actual brazing situation.

[0014] Furthermore, the first clamping module further includes a first clamping unit, the first clamping unit comprising:

[0015] A first adjustment part, the second adjustment part being disposed on a first base;

[0016] A pressure block, which is threadedly mounted on the first adjustment part.

[0017] The first clamping unit can fix a stepped cylindrical workpiece or a ring workpiece. By placing the stepped cylindrical workpiece or ring workpiece on the upper surface of the first base, moving the stepped cylindrical workpiece to the position of the first clamping unit, and rotating the first adjusting part, the pressure block can be used to press against the upper surface of the workpiece to fix the workpiece.

[0018] Furthermore, the first base is provided with a T-shaped groove;

[0019] The pressure block is also provided with a first connecting bolt, the head of which matches the T-shaped groove. The first connecting bolt passes through the pressure plate from bottom to top and is threaded with a first connecting nut.

[0020] The bottom of the connecting plate is provided with a second connecting bolt. The head of the second connecting bolt matches the T-shaped groove. The second connecting bolt passes through the bottom of the connecting plate from bottom to top and is threaded with a second connecting nut.

[0021] The fixture unit is fixed by matching the connecting bolts with the T-slot, which facilitates disassembly and assembly. The fixture unit can also be freely combined according to actual needs to improve the applicability of the tooling and increase the flexibility of its use.

[0022] Furthermore, the vacuum brazing fixture also includes a second clamping module, which is disposed on the side of the first clamping module. The second clamping module includes:

[0023] The second base has a second bolt groove at its bottom. By inserting the connecting bolt into the second bolt groove and the positioning hole, the second base is fixed to the tooling base plate.

[0024] The third clamping unit is mounted on the second base. The third clamping unit includes an arc-shaped gripper and a third adjusting part. The middle part of the arc-shaped gripper is pivotally connected to the top of one side of the second base. The third adjusting part drives the arc-shaped gripper to pivot.

[0025] Furthermore, the third adjustment unit includes:

[0026] A threaded sleeve is disposed on the side of the second base;

[0027] A screw, which is threadedly connected to a threaded sleeve, and one end of the screw is pivotally connected to the end of an arc-shaped gripper.

[0028] Furthermore, the second clamping module also includes a support block disposed on the upper inner side of the arc-shaped gripper, and the top of the support block is V-shaped.

[0029] The third clamping unit can fix the horizontal part of the pipe fitting, which can prevent the pipe fitting from rolling. The second clamping module can be used in combination with the first clamping module. Different numbers of the first clamping modules and the second clamping modules can be used according to actual needs and can be freely arranged on the tooling base plate to adapt to different processing needs, improve the applicability of the tooling, and improve the flexibility of the tooling.

[0030] Furthermore, the lower part of the support block is movably connected to the top of the second base, and the support block is fixed by a pin passing through the top of the second base and the lower part of the support block.

[0031] Pulling out the pin allows the support block to slide vertically, thus changing the height of the support block according to the actual processing conditions.

[0032] Furthermore, the brazing fixture also includes an adjustable support module, and the second clamping module is fixedly mounted on the adjustable support module;

[0033] The adjustable support module includes:

[0034] The fixing block has a connecting hole at its bottom. By inserting connecting bolts into the connecting hole and the positioning hole, the fixing block is fixed to the tooling base plate. An adjustment groove is also provided on the upper side of the fixing block.

[0035] The mounting plate is L-shaped. A second fixing hole is provided on the first side of the mounting plate corresponding to the adjustment groove, and a first fixing hole is provided on the second side of the mounting plate corresponding to the second bolt groove. The second base is fixed to the connecting plate by inserting the connecting bolt into the first fixing hole and the second bolt groove.

[0036] The height of the second fixture module can be adjusted by using an adjustable support module, thereby changing the height of the second fixture module according to the actual processing conditions.

[0037] This utility model has the following advantages:

[0038] This invention is applicable to the brazing and fixing of workpieces such as round pipes and cylindrical parts. One set of workpieces is placed on the upper surface of a first base, while another workpiece passes from top to bottom between a fixed clamping block and a movable clamping block. The workpiece positions are adjusted to ensure the two sets of workpieces are properly aligned. Solder is then applied. This prevents workpieces from collapsing during brazing or during loading into the brazing furnace, which could lead to solder failure or workpiece separation and affect welding quality. By setting a tooling base plate with an array of positioning holes, at least one set of clamping modules can be installed corresponding to the positioning holes at different positions. The number and layout of the clamping modules can be adjusted according to the actual brazing situation. Attached Figure Description

[0039] Figure 1 These are schematic diagrams of the vacuum brazing fixtures in Examples 1 and 2;

[0040] Figure 2 yes Figure 1 A schematic diagram of the first fixture module in the vacuum brazing fixture shown;

[0041] Figure 3 yes Figure 2 A side view of the first clamping module shown;

[0042] Figure 4 This is a schematic diagram of the vacuum brazing fixture in Example 3;

[0043] Figure 5 yes Figure 4 A schematic diagram of the second fixture module in the vacuum brazing fixture shown;

[0044] Figure 6 yes Figure 5 A side view of the second clamping module shown;

[0045] Figure 7 yes Figure 6An enlarged schematic diagram of part of structure A in the second fixture module shown;

[0046] Figure 8 This is a schematic diagram of the vacuum brazing fixture in Example 4;

[0047] Figure 9 This is a schematic diagram of the vacuum brazing fixture in Example 5;

[0048] Figure 10 This is a structural schematic diagram of the adjustable support module;

[0049] Figure 11 yes Figure 10 The diagram shows the structure of the fixed block in the adjustable support module.

[0050] Figure 12 yes Figure 10 The diagram shows the structural design of the mounting plate in the adjustable support module.

[0051] 100. Tooling base plate;

[0052] 200, First clamping module; 210, First base; 211, First bolt slot; 212, T-slot; 220, First clamping unit; 221, Pressure block; 222, First connecting bolt; 223, First adjusting part; 230, Second clamping unit; 231, Connecting plate; 232, Fixed clamping block; 233, Movable clamping block; 234, Second adjusting part; 234, Second connecting bolt;

[0053] 300. Second clamping module; 310. Second base; 311. Second bolt slot; 320. Third clamping unit; 321. Arc-shaped gripper; 322. Screw; 323. Threaded sleeve; 330. Support block;

[0054] 400 Adjustable support module; 410 Fixing block; 411 Adjustment groove; 412 Connection hole; 420 Mounting plate; 421 First fixing hole; 422 Second fixing hole. Detailed Implementation

[0055] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0056] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0057] As described in the background section, although existing fixtures and tooling meet the requirements for workpiece fixation in vacuum brazing to some extent, they still have significant limitations. Specifically, the layout of these fixtures and tooling is relatively fixed, resulting in low flexibility in use and making it impossible to adjust the fixture layout according to the actual brazing situation.

[0058] Example 1:

[0059] Therefore, to prevent workpiece collapse during brazing or during feeding into the brazing furnace, which could cause solder failure or workpiece separation and affect welding quality, and to improve the flexibility and applicability of the tooling, this utility model provides a vacuum brazing tooling. This embodiment provides a vacuum brazing tooling, such as... Figure 1 As shown, the vacuum brazing fixture includes:

[0060] The tooling base plate 100 has an array of positioning holes on its surface;

[0061] The clamping module is provided with at least one set; it is fixed to the tooling base plate by means of connecting bolts inserted into the preset positions and positioning holes of the at least one set of clamping modules.

[0062] like Figure 2 As shown, the clamping module includes a first clamping module 200, which includes:

[0063] The first base 210 has first bolt grooves 211 on both sides. Connecting bolts are inserted into the first bolt grooves and positioning holes to fix the first base to the tooling base plate.

[0064] The second clamping unit 230, such as Figure 3As shown, the second clamping unit includes a connecting plate 231, which is fixedly installed on the upper surface of the first base. A fixed clamping block 232 and a movable clamping block 233 are provided on the top of the connecting plate. The fixed clamping block is fixedly connected to the connecting plate, and the movable clamping block is located on the side of the fixed clamping block away from the connecting plate. The movable clamping block is driven to move linearly by the second adjusting part 234 to move closer to or away from the fixed clamping block. V-shaped grooves are provided on the side of the fixed clamping block away from the connecting plate and the side of the movable clamping block close to the fixed clamping block.

[0065] In this embodiment, the second adjustment part passes through the movable clamping block and is threadedly connected to the fixed clamping block.

[0066] This embodiment is applicable to the brazing and fixing of workpieces such as round pipes and cylindrical parts. For example, the tooling base plate can be fixed on the worktable of the vacuum brazing furnace first, then the first bolt groove of the first base can be set to correspond to the positioning hole in the positioning hole array, the connecting bolt can be inserted, the bolt can be tightened to fix the first base, and finally a set of second clamping units can be installed on the first base. One set of workpieces can be placed on the upper surface of the first base, and another workpiece can pass from top to bottom between the fixed clamping block and the movable clamping block. The second adjustment part can be rotated to make the movable clamping block approach the fixed clamping block to limit the workpiece between the fixed clamping block and the movable clamping block. At this time, the workpiece can also move up and down. At this time, the position of the workpiece on the first base can be adjusted so that the two sets of workpieces correspond and cooperate. Then the second adjustment part can be rotated again to make the clamping block fit tightly against the workpiece, fix the workpiece, and apply solder.

[0067] In this embodiment, multiple first clamping modules can be provided. For example, when welding the end of the U-shaped tube, two sets of first clamping modules can be installed opposite each other on the tooling base plate, and the two ends of the U-shaped tube can be inserted between the fixed clamping block and the movable clamping block of the two sets of first clamping modules respectively. Subsequent operations can refer to the operation after the cylindrical workpiece is inserted between the fixed clamping block and the movable clamping block.

[0068] This embodiment avoids workpiece collapse during brazing or during feeding into the brazing furnace, which could cause solder failure or workpiece separation and affect welding quality. Furthermore, by providing a tooling base plate with an array of positioning holes, at least one set of fixture modules can be installed corresponding to the positioning holes at different positions, allowing adjustment of the number and layout of fixture modules according to the actual brazing situation.

[0069] Example 2:

[0070] like Figure 2 As shown, the first clamping module described in Embodiment 1 may further include a first clamping unit 220, such as... Figure 3 As shown, the first clamping unit includes:

[0071] A first adjustment part 223, wherein the second adjustment part is disposed on the first base;

[0072] Pressure block 221, which is threadedly installed on the first adjustment part.

[0073] When welding cylindrical workpieces with steps, annular workpieces, or cylindrical workpieces with unequal connecting ends, the first clamping unit can be pre-fixed in a preset position. By placing the workpiece on the upper surface of the first base, moving the stepped cylindrical workpiece to the position of the first clamping unit, and rotating the first adjusting part, the pressure block can be pressed against the preset surface of the workpiece to fix the workpiece.

[0074] Alternatively, multiple first clamping units can be set, and the workpiece clamping stability can be improved by forming multiple compressions between the multiple first clamping units and multiple preset surfaces. In this embodiment, the pressure block can be designed as a Z-shape, and the inner side of the pressure block contacts the side of the workpiece to form an interface or mechanical stop to limit the workpiece and realize the rapid positioning of the workpiece.

[0075] In this embodiment, as Figure 2 , 3 As shown, the first base is provided with a T-shaped groove 212;

[0076] The pressure block is also provided with a first connecting bolt 222. The head of the first connecting bolt matches the T-shaped groove. The first connecting bolt passes through the pressure plate from bottom to top and is threaded with a first connecting nut.

[0077] The bottom of the connecting plate is provided with a second connecting bolt 235. The head of the second connecting bolt matches the T-shaped groove. The second connecting bolt passes through the bottom of the connecting plate from bottom to top and is threaded with a second connecting nut.

[0078] The fixture unit is fixed by matching the connecting bolts with the T-slot, which facilitates disassembly and assembly. The fixture unit can also be freely combined according to actual needs to improve the applicability of the tooling and increase the flexibility of its use.

[0079] Example 3:

[0080] This embodiment provides another implementation of the vacuum brazing fixture, such as... Figure 4 As shown, based on Embodiment 1, the vacuum brazing fixture in this embodiment further includes a second clamping module 300, which is disposed on the side of the first clamping module, as shown below. Figure 5 As shown, the second clamping module includes:

[0081] The second base 310 has a second bolt groove 311 at its bottom. By inserting the connecting bolt into the second bolt groove and the positioning hole, the second base is fixed to the tooling base plate.

[0082] The third clamping unit 320 is mounted on the second base, as shown below. Figure 6 As shown, the third clamping unit includes an arc-shaped gripper 321 and a third adjustment part. The middle part of the arc-shaped gripper 321 is pivotally connected to the top of one side of the second base, and the arc-shaped gripper is driven to pivot through the third adjustment part.

[0083] like Figure 7 As shown, the third adjustment unit includes:

[0084] Threaded sleeve 323, which is disposed on the side of the second base;

[0085] Screw 322, the screw is threadedly connected to the threaded sleeve, and one end of the screw is pivotally connected to the end of the arc-shaped gripper.

[0086] By using different numbers of first fixture modules and second fixture modules and freely arranging them on the tooling base plate, different processing needs can be met, thereby increasing the applicability and flexibility of the tooling.

[0087] Figure 4 Examples are given of welding L-shaped pipe fittings to straight pipe fittings, such as... Figure 4 As shown, a set of first clamping modules (excluding the first clamping unit) and second clamping modules are installed on the tooling base plate. The installation method can refer to the installation method of the first clamping module. The end of the L-shaped pipe that does not need to be welded is placed between the arc-shaped jaws. The L-shaped pipe is rotated so that the end of the L-shaped pipe that needs to be welded is vertically upward. Then, the straight pipe workpiece passes from top to bottom between the fixed clamping block and the movable clamping block. The second adjustment part is rotated so that the movable clamping block is close to the fixed clamping block to limit the workpiece between the fixed clamping block and the movable clamping block. At this time, the workpiece can also move up and down to adjust the position of the workpiece so that the two workpieces correspond and cooperate. Then, the threaded sleeve is rotated so that the screw moves linearly, thereby driving the arc-shaped jaws to rotate to fix the L-shaped pipe. Then, the second adjustment part is rotated again so that the movable clamping block is close to the workpiece to fix the workpiece and apply solder.

[0088] In this embodiment, the horizontal part of the pipe can be fixed by the third clamping unit to prevent the pipe from rolling. The second clamping module can be used in combination with the first clamping module.

[0089] In this embodiment, the arc-shaped grippers are provided in two sets, and the ends of the two sets of arc-shaped grippers are pivotally connected to screws. The two sets of screws are partially wrapped in threaded sleeves, and the two sets of screws can be extended or retracted by rotating the threaded sleeves.

[0090] In this embodiment, as Figure 5 As shown, the second clamping module also includes a support block 330, which is disposed on the upper inner side of the arc-shaped gripper, and the top of the support block is V-shaped.

[0091] The support block is positioned between two sets of arc-shaped grippers, which can support and position the workpiece.

[0092] In addition, the lower part of the support block is movably connected to the top of the second base, and the support block is fixed by a pin passing through the top of the second base and the lower part of the support block.

[0093] Pulling out the pin allows the support block to slide vertically, thus changing the height of the support block according to the actual processing conditions.

[0094] Example 4:

[0095] Figure 8 This illustrates another layout of the first clamping module and the second clamping module in Embodiment 3, such as... Figure 8 As shown, the second clamping module is positioned opposite to the first clamping module on both sides. The two ends of the T-shaped pipe are placed on the support block. The L-shaped pipe is rotated so that the end of the L-shaped pipe to be welded is vertically upward. Then, the straight pipe workpiece passes from top to bottom between the fixed clamping block and the movable clamping block. The second adjusting part is rotated so that the movable clamping block is close to the fixed clamping block to limit the workpiece between the fixed clamping block and the movable clamping block. At this time, the workpiece can also move up and down to adjust the position of the workpiece so that the two workpieces correspond and cooperate. Then, the threaded sleeve is rotated so that the screw moves linearly, thereby driving the arc-shaped clamping jaw to rotate to fix the L-shaped pipe. Then, the second adjusting part is rotated again so that the movable clamping block is close to the workpiece to fix the workpiece and apply the solder.

[0096] Example 5:

[0097] In this embodiment, as Figure 9 As shown, the brazing fixture may further include an adjustable support module 400, and the second clamping module is fixedly mounted on the adjustable support module;

[0098] like Figure 10 As shown, the adjustable support module includes:

[0099] Fixed block 410, such as Figure 11 As shown, the bottom of the fixing block is provided with a connecting hole 412. By inserting the connecting bolt into the connecting hole and the positioning hole, the fixing block is fixed to the tooling base plate. An adjustment groove 411 is also provided on the upper side of the fixing block.

[0100] Mounting plate 420, such as Figure 12 As shown, the mounting plate is L-shaped. A second fixing hole 422 is provided on the first side of the mounting plate corresponding to the adjustment groove, and a first fixing hole 421 is provided on the second side of the mounting plate corresponding to the second bolt groove. The second base is fixed to the connecting plate by inserting the connecting bolt into the first fixing hole and the second bolt groove.

[0101] Figure 9This embodiment illustrates one layout method, such as... Figure 9 As shown, the first base can be installed on the tooling base plate first, and then the stepped workpiece can be placed on the upper surface of the first base. Next, the connecting plate with the fixed clamping block is installed and fixed to the stepped workpiece. Then, the movable clamping block with the second adjustment part is installed onto the fixed clamping block, so that the stepped workpiece is positioned between the fixed and movable clamping blocks. The second adjustment part is rotated to bring the movable clamping block closer to the fixed clamping block, thus limiting the workpiece between the fixed and movable clamping blocks. At this time, the workpiece can still move up and down. Finally, the first clamping unit is installed and fixed. Rotate the first adjustment part and simultaneously tighten the first connecting nut to press the pressure block tightly onto the stepped surface of the stepped workpiece. Then, place the two sets of adjustable support modules with the second clamping module installed on the tooling base plate. Place the T-shaped pipe on the support block of the second clamping module and rotate the threaded sleeve to fix the T-shaped pipe with the arc-shaped jaws. Adjust the position of the clamping strip support module so that the welding end of the T-shaped pipe corresponds to the welding end of the stepped pipe. Then, fix the adjustable support module and adjust the height of the second clamping module so that the T-shaped pipe is aligned with the stepped joint. Apply solder.

[0102] In this embodiment, the height of the second fixture module can be adjusted by the adjustable support module, thereby changing the height of the second fixture module according to the actual processing conditions.

[0103] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vacuum brazing fixture, characterized by, The vacuum brazing tool comprises a tool base plate, a positioning hole array is arranged on the surface of the tool base plate, a clamp module is arranged on the tool base plate, the clamp module comprises at least one group, a connecting bolt is inserted into the preset position of the clamp module and the positioning hole, so that the clamp module is fixed with the tool base plate, the clamp module comprises a first clamp module, the first clamp module comprises a first base plate, a first bolt slot is arranged on both sides of the first base plate, a connecting bolt is inserted into the first bolt slot and the positioning hole, so that the first base plate is fixed with the tool base plate, a second clamp unit is arranged on the upper surface of the first base plate, a fixed clamp block and a movable clamp block are arranged on the top of the connecting plate, the fixed clamp block is fixedly connected with the connecting plate, the movable clamp block is arranged on the side of the fixed clamp block away from the connecting plate, the second adjusting part drives the linear motion of the movable clamp block to approach or move away from the fixed clamp block, V-shaped grooves are arranged on the side of the fixed clamp block away from the connecting plate and the side of the movable clamp block close to the fixed clamp block. The second adjusting part passes through the movable clamp block and is threadedly connected with the fixed clamp block. The first clamp module further comprises a first clamp unit, the first clamp unit comprises a first adjusting part arranged on the first base plate, and a pressing block threadedly mounted on the first adjusting part. A T-shaped slot is arranged on the first base plate. A first connecting bolt is further arranged on the pressing block, the head of the first connecting bolt is matched with the T-shaped slot, the first connecting bolt passes through the pressing plate from bottom to top, and is threadedly sleeved with a first connecting nut. A second connecting bolt is arranged on the bottom of the connecting plate, the head of the second connecting bolt is matched with the T-shaped slot, the second connecting bolt passes through the bottom of the connecting plate from bottom to top, and is threadedly sleeved with a second connecting nut. The vacuum brazing tool further comprises a second clamp module arranged on the side of the first clamp module, the second clamp module comprises a second base plate, a second bolt slot is arranged on the bottom of the second base plate, a connecting bolt is inserted into the second bolt slot and the positioning hole, so that the second base plate is fixed with the tool base plate, a third clamp unit is arranged on the second base plate, the third clamp unit comprises an arc-shaped clamp jaw and a third adjusting part, the middle part of the arc-shaped clamp jaw is pivotally connected with the top of one side of the second base plate, and the arc-shaped clamp jaw is pivotally moved by the third adjusting part.

2. A vacuum brazing fixture according to claim 1, wherein The third adjusting part comprises a threaded sleeve arranged on the side of the second base plate, a screw rod threadedly connected with the threaded sleeve, and one end of the screw rod pivotally connected with the end of the arc-shaped clamp jaw.

3. A vacuum brazing fixture according to claim 1, wherein The second clamp module further comprises a support block arranged on the inner side of the upper part of the arc-shaped clamp jaw, and the top of the support block is V-shaped. The lower part of the support block is movably connected with the top of the second base plate, and the support block is fixed by a pin passing through the top of the second base plate and the lower part of the support block. The brazing tool further comprises an adjustable supporting module, and the second clamp module is fixedly arranged on the adjustable supporting module.

4. A vacuum brazing fixture according to claim 3, wherein The adjustable supporting module comprises ​ ​ 5. The vacuum brazing fixture of claim 1, wherein, ​ ​ ​ 6. A vacuum brazing fixture according to claim 5, wherein ​ ​ ​ 7. A vacuum brazing fixture according to claim 5, wherein ​ 8. A vacuum brazing fixture according to claim 7, wherein ​ 9. A vacuum brazing fixture according to claim 5, wherein ​ ​ The fixing block is provided with a connecting hole at the bottom, and the fixing block and the tool bottom plate are fixed by inserting a connecting bolt into the connecting hole and the positioning hole. The mounting plate is L-shaped, and a second fixing hole is arranged on the first side of the mounting plate corresponding to the adjusting groove, and a first fixing hole is arranged on the second side of the mounting plate corresponding to the second bolt groove, and the second base and the connecting plate are fixed by inserting a connecting bolt into the first fixing hole and the second bolt groove.

Images