Diffusion welding tool for titanium-nickel alloy core plate of heat exchanger

Abstract

The utility model provides a diffusion welding tool for a titanium-nickel alloy core plate of a heat exchanger, and relates to the technical field of production of nickel alloy core plates of heat exchangers. The tool comprises a box body, a top plate which is arranged at the top of the box body and can be opened, and a baffle which is arranged on one side of the box body and can be opened. One side of the top plate is rotationally connected with the back plate opposite to the baffle; wherein the back plate is a plate body on one side, opposite to the baffle plate, of the box body; the baffle is rotationally connected with the bottom of the box; when the baffle is vertical, the baffle is buckled with the free end of the top plate, so that a positioning inner cavity is formed in the box body; an adjusting screw vertically penetrates through the middle of the top plate, and the lower end of the adjusting screw is connected with a pressing plate. A pressure sensor is arranged at the bottom of the box body. The titanium-nickel alloy core plate welding tool can solve the problems that an existing titanium-nickel alloy core plate welding tool cannot accurately control pressure, and a product is difficult to disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of production of nickel alloy core plates of heat exchangers, in particular to a diffusion welding tool for titanium-nickel alloy core plates of heat exchangers. Background Art

[0002] At present, heat exchangers are widely used in many fields, such as automotive thermal management systems, heat exchange devices in natural gas LNG ships, etc. The steel heat exchange core plates of traditional heat exchangers cannot meet the needs of long-term use of heat exchangers, so core plates made of titanium-nickel alloy rolling are also used as the main components of heat exchangers. In the heat exchanger, the stacked titanium-nickel alloy core plates need to be diffusion welded. This diffusion welding requires maintaining a certain downward pressure in a high-temperature vacuum environment of 700-800°C to ensure that the diffusion welding between the titanium-nickel alloy core plates is firm and accurate. However, it is difficult to control the pressure in the current welding tooling, and the pressure sensor cannot work in a high-temperature environment. In addition, the existing welding tooling will damage the product when disassembling the welded product. Utility Model Content

[0003] In order to avoid the shortcomings of the existing technology, the utility model provides a diffusion welding tool for a titanium-nickel alloy core plate of a heat exchanger. The present invention solves the problems that the existing welding tool for the titanium-nickel alloy core plate cannot accurately control the pressure and is difficult to disassemble the product.

[0004] A diffusion welding tool for a titanium-nickel alloy core plate of a heat exchanger, comprising:

[0005] A box body, an openable top plate provided on the top of the box body, and an openable baffle provided on one side of the box body;

[0006] One side of the top plate is rotatably connected to the back plate opposite to the baffle; wherein the back plate is a plate on the side of the box body opposite to the baffle;

[0007] The baffle is rotatably connected to the bottom of the box;

[0008] When the baffle is in a vertical position, it is locked with the free end of the top plate to form a positioning cavity in the box;

[0009] An adjusting screw is vertically passed through the middle of the top plate, and a pressing plate is connected to the lower end of the adjusting screw;

[0010] A pressure sensor is provided at the bottom of the box.

[0011] Preferably, at least one buckle groove is provided at the upper end of the baffle, and a buckle portion matching the buckle groove is provided at the free end of the top plate.

[0012] Preferably, when the baffle is flipped to a horizontal state, the upper end plane thereof is flush with the bottom surface of the box body.

[0013] Preferably, a translationally movable pad is placed on the bottom surface of the box body;

[0014] A mounting hole is provided on the bottom surface of the box body, a mounting seat is detachably mounted in the mounting hole, and a pressure sensor in contact with the backing plate is mounted on the top of the mounting seat.

[0015] Preferably, the mounting hole is a threaded hole, and the mounting seat is cylindrical with an external thread provided on the outer side.

[0016] Preferably, the bottom of the mounting base is provided with an external transmission jack connected to the pressure sensor, and the bottom of the box is provided with a wire groove connecting the mounting hole and the outer edge, and the external transmission jack is connected to the display through an external signal line located in the wire groove.

[0017] Preferably, the area of ​​the pressing plate is not less than half of the bottom area of ​​the box body.

[0018] Preferably, the rotation angle of the baffle is 0-90°; the rotation angle of the top plate is 0-180°.

[0019] Preferably, handles are installed on both side outer walls of the box body; a horizontal handle is provided on the top of the adjusting screw outside the box body, and a locking nut is provided on the outside of the adjusting screw between the horizontal handle and the top plate.

[0020] Preferably, the box includes:

[0021] A bottom plate and a back plate vertically arranged on the bottom plate, wherein the bottom plate and the back plate form an integrated tooling seat; the box body also includes:

[0022] A baffle is provided on a side of the tooling seat body opposite to the back plate, wherein the bottom of the baffle is rotatably connected to the side edge of the tooling seat body;

[0023] Two side panels are vertically arranged on the tooling seat body and are arranged opposite to the back panel and the baffle;

[0024] A top plate is provided on the cavity surrounded by the back plate, the baffle plate and the two side plates, and one side of the top plate is rotatably connected to the top of the back plate;

[0025] When the baffle is vertical, the free end of the top plate away from the back plate is locked with the upper end of the baffle, so that the tooling seat body and the back plate, baffle, two side plates and top plate form a positioning inner cavity.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The utility model provides a diffusion welding tool for the titanium-nickel alloy core plate of a heat exchanger. The tool has a reasonable structure. By arranging a detachable mounting seat and a pressure sensor installed on the upper end of the mounting seat, the pressure on the stacked titanium-nickel alloy core plates can be detected before entering a high-temperature vacuum environment, and the pressure can be controlled by adjusting the screw. When entering the high-temperature vacuum environment for diffusion welding, the mounting seat can be removed without damaging the pressure sensor. The pad can be moved on the bottom surface of the positioning inner cavity to facilitate the translational disassembly of the welded product, thereby solving the problem that the existing titanium-nickel alloy core plate welding tool cannot accurately control the pressure and the product disassembly is difficult. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a side cross-sectional structural diagram of the positioning inner cavity in a closed state of the utility model;

[0029] Figure 2 This is a side sectional structural diagram of the positioning cavity of the utility model in an open state;

[0030] Figure 3 This is a schematic diagram of the bottom structure of the tooling seat body of the present utility model;

[0031] Figure 4 This is a schematic diagram of the diffusion welding state of the present invention;

[0032] Figure 5 This is a schematic diagram of the product disassembly after welding is completed in this utility model.

[0033] Reference numerals:

[0034] 1. Tooling seat body, 11. Top plate, 12. Buckle part, 13. Buckle slot, 14. Handle, 15. Wire guide slot, 16. Display, 17. Side panel, 2. Pad, 3. Baffle, 4. Mounting seat, 5. Pressure sensor, 6. Positioning cavity, 7. Press plate, 8. Adjusting screw, 9. Horizontal handle, 10. Locking nut. DETAILED DESCRIPTION

[0035] Several specific implementations of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific implementations.

[0036] The purpose of the utility model is to provide a diffusion welding tool for a titanium-nickel alloy core plate of a heat exchanger, which can solve the problems that the existing titanium-nickel alloy core plate welding tool cannot accurately control the pressure and is difficult to disassemble the product.

[0037] To achieve the above purpose, see Figures 1-3As shown, a diffusion welding tool for the titanium-nickel alloy core plate of a heat exchanger includes a box body, an openable top plate 11 arranged on the top of the box body, and an openable baffle 3 arranged on one side of the box body; one side of the top plate 11 is rotatably connected to the back plate opposite to the baffle 3; wherein the back plate is a plate body on the side of the box body opposite to the baffle 3; the baffle 3 is rotatably connected to the bottom of the box body; when the baffle 3 is in a vertical position, it is interlocked with the free end of the top plate 11 to form a positioning inner cavity 6 in the box body; an adjusting screw 8 is vertically penetrated through the middle of the top plate 11, and the lower end of the adjusting screw 8 is connected to the pressure plate 7; a pressure sensor 5 is provided at the bottom of the box body.

[0038] To this end, the stacked titanium-nickel alloy core plates are placed in a box, pressed by a pressing plate 7, and the pressure on the stacked titanium-nickel alloy core plates is detected by a pressure sensor 5 at the bottom, thereby achieving precise control of the pressure of the titanium-nickel alloy core plate welding tooling.

[0039] By providing a horizontal handle 9 on the top of the adjusting screw 8, a locking nut 10 is provided on the outside of the adjusting screw between the horizontal handle and the top plate. After adjusting the pressure, the adjusting screw can be locked by the locking nut to prevent it from rotating.

[0040] The box body includes a bottom plate and a back plate vertically arranged on the bottom plate, wherein the bottom plate and the back plate form an integrated tooling seat body 1; the box body also includes:

[0041] The baffle 3 is provided on the side of the tooling seat body 1 opposite to the back plate, and the bottom of the baffle 3 is rotatably connected to the side edge of the tooling seat body 1;

[0042] Two side panels 17 are vertically arranged on the tooling seat body 1 and are arranged opposite to the back panel and the baffle 3;

[0043] The top plate 11 is provided on the cavity surrounded by the back plate, the baffle 3 and the two side plates 17, and one side of the top plate 11 is rotatably connected to the top of the back plate;

[0044] When the baffle 3 is vertical, the free end of the top plate 11 away from the back plate is locked with the upper end of the baffle 3 , so that the tooling seat body 1 and the back plate, baffle 3 , two side plates 17 and top plate 11 form a positioning cavity 6 .

[0045] In this embodiment, a diffusion welding tool for a titanium-nickel alloy core plate of a heat exchanger is provided, including a tool seat body, the bottom plate of the tool seat body is rectangular, and side plates are provided on three sides of its upper side, and a reversible baffle is provided on the remaining side. The upper end of the side plate opposite to the baffle on the tool seat body is rotatably connected to a top plate. When the baffle is in a vertical position, the free end of the top plate is interlocked with the upper end of the baffle to form a positioning inner cavity inside the tool seat body. An adjusting screw is vertically passed through the middle of the top plate, and the lower end of the adjusting screw is connected to a pressure plate. The positioning inner cavity A translatable pad is placed on the bottom surface, a mounting hole is provided in the middle of the bottom plate of the tooling seat body, a mounting seat is detachably installed in the mounting hole, and a pressure sensor in contact with the pad is installed on the top of the mounting seat. By providing a detachable mounting seat and a pressure sensor installed on the upper end of the mounting seat, the pressure on the stacked titanium-nickel alloy core plate can be detected before entering the high-temperature vacuum environment, and the pressure can be controlled by adjusting the screw. When entering the high-temperature vacuum environment for diffusion welding, the mounting seat is removed without damaging the pressure sensor.

[0046] In order to achieve interlocking of the baffle 3 with the free end of the top plate 11 when the baffle 3 is in a vertical position, at least one interlocking groove 13 is provided at the upper end of the baffle 3, and a buckle portion 12 is provided at the free end of the top plate 11 to match the interlocking groove 13. By interlocking the interlocking groove 13 at the upper end of the baffle 3 with the buckle portion 12 provided at the free end of the top plate 11, the baffle 3 is interlocked with the free end of the top plate 11 when the baffle 3 is in a vertical position, forming a self-locking fit between the baffle and the top plate, ensuring the stability of the positioning inner cavity, and preventing misalignment between the titanium-nickel alloy core plate layers when the titanium-nickel alloy core plate is pressed.

[0047] To facilitate placement of the stacked titanium-nickel alloy core plates within the housing, a baffle 3 is configured so that its upper surface is flush with the bottom of the housing when flipped horizontally. When the baffle is flipped horizontally, its upper surface is flush with the bottom of the positioning cavity, that is, with the bottom of the housing. This allows the backing plate and the product to be moved horizontally to the upper side of the baffle after welding, facilitating subsequent processing. A translatable backing plate 2 is placed on the bottom of the housing; this allows the stacked titanium-nickel alloy core plates to be effectively placed within the housing.

[0048] In order to place the pressed laminated titanium-nickel alloy core plate in a high-temperature vacuum environment for diffusion welding without affecting the pressure sensor, a mounting hole is provided on the bottom surface of the box. A mounting seat 4 is detachably mounted in the mounting hole. A pressure sensor 5 is mounted on top of the mounting seat 4, which contacts the backing plate 2. To this end, the mounting seat can be removed when entering the high-temperature vacuum environment for diffusion welding without damaging the pressure sensor.

[0049] To facilitate removal of the pressure sensor, the mounting hole is threaded. The mounting base 4 is cylindrical and has external threads on its exterior, facilitating installation and removal. An external transmission jack, connected to the pressure sensor 5, is located at the bottom of the mounting base 4. A wire channel 15 connects the mounting hole to the outer edge of the housing. The external transmission jack is connected to the display 16 via an external signal cable located within the channel 15. This allows the pressure sensor reading in the mounting base to be displayed on the display, facilitating pressure adjustment.

[0050] The area of ​​pressure plate 7 is set to be no less than half the area of ​​the bottom surface of the box. This ensures uniform pressure on the titanium-nickel alloy core plate. The rotation angle of baffle 3 is set to 0-90°; the rotation angle of top plate 11 is set to 0-180°. This can limit the rotation of the baffle and top plates to improve efficiency. Handles 14 are installed on both sides of the outer wall of the box to facilitate the transportation of the entire tooling and transport it to the high-temperature vacuum environment for diffusion welding.

[0051] In order to further illustrate the diffusion welding tooling of the titanium-nickel alloy core plate of the heat exchanger provided by the present invention, it is further described in conjunction with the accompanying drawings.

[0052] See also Figure 1-5 As shown, the present invention solves the problem that the existing welding tooling of titanium-nickel alloy core plates cannot accurately control the pressure and the product is difficult to disassemble, and provides the following technical solutions: A diffusion welding tooling for titanium-nickel alloy core plates of heat exchangers, comprising a tooling seat body 1, the bottom plate of the tooling seat body 1 is rectangular, and side panels 17 are provided on three sides of its upper side, and a reversible baffle 3 is provided on the remaining side. The upper end of the side panel 17 on the tooling seat body 1 opposite to the baffle 3 is rotatably connected to a top plate 11. When the baffle 3 is in a vertical position, the free end of the top plate 11 is interlocked with the upper end of the baffle 3 to form a positioning inner cavity 6 inside the tooling seat body 1. The middle part of the top plate 11 is vertically penetrated by a Screw 8, the lower end of the adjusting screw 8 is connected to a pressure plate 7, a translatable pad 2 is placed on the bottom surface of the positioning inner cavity 6, a mounting hole is provided in the middle of the bottom plate of the tooling seat body 1, a mounting seat 4 is detachably installed in the mounting hole, a pressure sensor 5 in contact with the pad 2 is installed on the top of the mounting seat 4, and by providing a detachable mounting seat 4 and a pressure sensor 5 installed on the upper end of the mounting seat 4, the pressure of the stacked titanium-nickel alloy core plate can be detected before entering the high-temperature vacuum environment, and the pressure can be controlled by adjusting the screw 8. When entering the high-temperature vacuum environment for diffusion welding, the mounting seat 4 is removed without damaging the pressure sensor.

[0053] Specifically, the tooling seat body 1 is made of steel, and the area of ​​the positioning cavity 6 enclosed therein matches the size of the titanium-nickel alloy core plate. The top plate 11 and the side plate 17 are connected by a rotating shaft, and the baffle 3 and the bottom plate of the tooling seat body 1 can be connected through an axial hole. The adjusting screw 8 and the top plate 11 are matched with high-precision threads. Among them, the mounting hole is a threaded hole, and the mounting seat 4 is cylindrical, with an external thread on the outside to facilitate the installation and removal of the mounting seat 4. A ridge or groove can be provided at the bottom of the mounting seat 4 to facilitate the use of tools to rotate the mounting seat 4. In addition, the area of ​​the pressure plate 7 is not less than half the bottom area of ​​the positioning cavity 6 to ensure uniform pressure on the titanium-nickel alloy core plate. The rotation angle of the baffle 3 is 0-90°, and the rotation angle of the top plate 11 is 0-180°. The rotation of the baffle 3 and the top plate 11 can be limited to improve efficiency.

[0054] During use, the etched titanium-nickel composite metal plate is finished, the diffusion welding surface is polished, 0.1mm copper foil is pre-placed in the diffusion welding area (except the flow channel), and the core layers are stacked according to the required number of core layers and stacked in the positioning cavity 6. After the stacking is completed, the baffle 3 is rotated to a vertical state and fastened to the top plate 11. Then the adjusting screw 8 is rotated to make the pressure plate 7 pressurize the titanium-nickel composite metal plate. While adjusting the pressure, the reading of the pressure sensor is observed. After reaching the required reading, the mounting base 4 is removed. The entire tooling is then placed in a 700-800℃ environment for diffusion welding for 4 hours to fuse the 0.1mm copper foil with the titanium-nickel composite metal plate, forming an alloy structure with properties similar to monel alloy inside the core plate, thereby improving the life of the core plate.

[0055] After welding is complete, the tooling is removed and allowed to cool. The top plate 11 and baffle 3 are opened, and the backing plate 2 and the product are removed for processing, completing the welding process. When the baffle 3 is flipped to a horizontal position, its upper surface is flush with the bottom surface of the positioning cavity 6. This allows the backing plate 2 and the product to be moved horizontally to the upper side of the baffle 3 after welding, facilitating subsequent processing.

[0056] In order to facilitate the movement of the tooling, handles 14 are installed on the outer side walls of both sides of the tooling base body 1 to facilitate the transportation of the entire tooling and transport it to a high-temperature vacuum environment for diffusion welding.

[0057] In this embodiment, if Figure 1-2 As shown, the upper end of the baffle 3 is provided with at least one buckle groove 13, and the free end of the top plate 11 is provided with a buckle portion 12 matching the buckle groove 13, so that a self-locking fit is formed between the baffle 3 and the top plate 11, ensuring the stability of the positioning inner cavity 6, and the relative side walls between the buckle groove 13 and the buckle portion 12 are inclined, which can generate a self-locking force.

[0058] In this embodiment, the bottom of the mounting base 4 is provided with an external transmission jack connected to the pressure sensor 5. The bottom of the tooling base body 1 is provided with a wire groove 15 connecting the mounting hole and the outer edge. The external transmission jack is connected to the display 16 via an external signal line located within the wire groove 15, so that the value of the pressure sensor 5 in the mounting base 4 is displayed on the display 16, facilitating pressure adjustment. Of course, in this embodiment, the pressure sensor 5 can also be connected to the terminal using wireless transmission, and the pressure value can be displayed on the terminal, which can be adjusted as needed.

[0059] In this embodiment, if Figure 1-2 As shown, a horizontal handle 9 is provided on the top of the adjusting screw 8, and a locking nut 10 is provided on the outside of the adjusting screw 8 between the horizontal handle 9 and the top plate 11. After adjusting the pressure, the adjusting screw 8 can be locked by the locking nut 10 to prevent it from rotating.

[0060] In summary, the present invention discloses a diffusion welding fixture for a titanium-nickel alloy core plate of a heat exchanger, comprising a fixture seat body, a rectangular bottom plate of the fixture seat body, three sides of which are provided with side plates, and the remaining side is provided with a reversible baffle. The upper ends of the side plates on the fixture seat body opposite the baffle are rotatably connected to a top plate. When the baffle is in a vertical position, the free end of the top plate interlocks with the upper end of the baffle to form a positioning cavity inside the fixture seat body. An adjusting screw is vertically passed through the middle of the top plate, the lower end of the adjusting screw is connected to a pressure plate, a translatable pad is placed on the bottom surface of the positioning cavity, a mounting hole is provided in the middle of the bottom plate of the fixture seat body, a mounting seat is detachably installed in the mounting hole, and a pressure sensor in contact with the pad is installed on the top of the mounting seat. The present invention can solve the problems of the existing welding fixture for titanium-nickel alloy core plates in that the pressure cannot be accurately controlled and the product is difficult to disassemble.

[0061] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A diffusion welding tool for a titanium-nickel alloy core plate of a heat exchanger, characterized in that: include: A box body, and an openable top plate (11) provided on the top of the box body and an openable baffle (3) provided on one side of the box body; One side of the top plate (11) is rotatably connected to a back plate opposite to the baffle (3); wherein the back plate is a plate on the box body opposite to the baffle (3); The baffle (3) is rotatably connected to the bottom of the box; When the baffle (3) is in a vertical position, it interlocks with the free end of the top plate (11), thereby forming a positioning cavity (6) in the box body; An adjusting screw (8) is vertically passed through the middle of the top plate (11), and the lower end of the adjusting screw (8) is connected to a pressing plate (7); A pressure sensor (5) is provided at the bottom of the box.

2. The diffusion welding tooling for the titanium-nickel alloy core plate of the heat exchanger according to claim 1 is characterized in that: At least one buckle groove (13) is provided at the upper end of the baffle (3), and a buckle portion (12) matching the buckle groove (13) is provided at the free end of the top plate (11).

3. The diffusion welding tooling for the titanium-nickel alloy core plate of the heat exchanger according to claim 1 is characterized in that: When the baffle (3) is flipped to a horizontal state, the upper end plane thereof is flush with the bottom surface of the box body.

4. The diffusion welding tool for the titanium-nickel alloy core plate of the heat exchanger according to claim 1, characterized in that: A translationally movable pad (2) is placed on the bottom surface of the box; A mounting hole is provided on the bottom surface of the box body, a mounting seat (4) is detachably mounted in the mounting hole, and a pressure sensor (5) in contact with the backing plate (2) is mounted on the top of the mounting seat (4).

5. The diffusion welding tool for the titanium-nickel alloy core plate of the heat exchanger according to claim 4, characterized in that: The mounting hole is a threaded hole, and the mounting seat (4) is cylindrical, with an external thread provided on the outer side.

6. The diffusion welding tool for the titanium-nickel alloy core plate of the heat exchanger according to claim 5, characterized in that: The bottom of the mounting seat (4) is provided with an external transmission jack connected to the pressure sensor (5), the bottom of the box body is provided with a wire groove (15) connecting the mounting hole and the outer edge, and the external transmission jack is connected to the display (16) via an external signal line located in the wire groove (15).

7. The diffusion welding tool for the titanium-nickel alloy core plate of the heat exchanger according to claim 1, characterized in that: The area of ​​the pressing plate (7) is not less than half the area of ​​the bottom surface of the box body.

8. The diffusion welding tool for the titanium-nickel alloy core plate of the heat exchanger according to claim 1, characterized in that: The rotation angle of the baffle (3) is 0-90°; the rotation angle of the top plate (11) is 0-180°.

9. The diffusion welding tool for the titanium-nickel alloy core plate of the heat exchanger according to claim 1, characterized in that: Handles (14) are installed on the outer side walls of both sides of the box body; a horizontal handle is provided on the top of the adjusting screw outside the box body, and a locking nut is provided on the outer side of the adjusting screw between the horizontal handle and the top plate.

10. The diffusion welding tool for the titanium-nickel alloy core plate of the heat exchanger according to claim 1, characterized in that: The box includes: A bottom plate and a back plate vertically arranged on the bottom plate, wherein the bottom plate and the back plate form an integral tooling seat body (1); the box body further comprises: A baffle (3) is provided on a side of the tooling seat (1) opposite to the back plate, and the bottom of the baffle (3) is rotatably connected to the side edge of the tooling seat (1); Two side panels (17) are vertically arranged on the tooling seat body (1) and are arranged opposite to each other on both sides of the back panel and the baffle (3); A top plate (11) is arranged on a cavity surrounded by the back plate, the baffle (3) and the two side plates (17), and one side of the top plate (11) is rotatably connected to the top of the back plate; When the baffle (3) is in a vertical position, the free end of the top plate (11) away from the back plate is interlocked with the upper end of the baffle (3), so that the tooling seat (1) and the back plate, baffle (3), two side plates (17), and top plate (11) form a positioning inner cavity (6).

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