A vacuum brazing fixture for special-shaped nozzles with curved tubes and its use method

Abstract

A vacuum brazing fixture for a special-shaped nozzle with a curved tube and a method for using the same belong to the technical field of welding fixtures. There is a special-shaped cavity inside the mainboard, which includes a central cavity, an upper cavity, a left cavity, a lower cavity and a right cavity. The central cavity is located in the middle of the mainboard, and passes through the front and rear side walls of the mainboard. The upper end is connected to the upper cavity, the left side is connected to the left cavity, the lower end is connected to the lower cavity, and the right end is connected to the right cavity. The upper end of the upper cavity passes through the upper surface of the mainboard and has a nozzle seat fixing assembly inside. The upper end of the mainboard has a nozzle joint fixing assembly; the left end of the left cavity passes through the left side of the mainboard and has a nozzle positioning assembly inside the left cavity; the lower end of the lower cavity passes through the lower surface of the mainboard and has an insulation sleeve fixing assembly inside the lower cavity; the right end of the right cavity passes through the right side of the mainboard and has a catheter fixing assembly inside the right cavity. The present invention effectively solves the problem of positioning and pressing of complex product structures through conformal structural design, easy-to-operate wedge-shaped pressing mechanism and multifunctional positioning assembly, thereby improving assembly efficiency and welding accuracy.

Description

Technical Field

[0001] The invention relates to a vacuum brazing fixture for a special-shaped nozzle product with an elbow and a use method thereof, belonging to the technical field of welding fixtures. Background Art

[0002] In the manufacturing industry, the production of special-shaped nozzles with curved tubes presents numerous challenges due to their complex structures and stringent assembly and welding requirements. Designing specialized welding fixtures to meet these production demands is crucial. These products require extremely high positioning accuracy, so fixture design must not only ensure structural rationality but also balance ease of use and processability.

[0003] First, the complex and diverse structural characteristics of special-shaped nozzles with curved tubes place special demands on the design of the fixture's main structure. While ensuring the fixture meets the production process requirements, cleverly designing the fixture structure to accommodate the product's unique shape becomes a major design challenge.

[0004] Secondly, due to the small size of the product, the design space for the fixture is limited. Traditional fixture design structures often cannot meet the positioning and clamping requirements of such products. Therefore, innovative design ideas are needed to achieve effective positioning and clamping of the product by changing the fixture structure.

[0005] Furthermore, the assembly process for special-shaped nozzles with curved tubes involves numerous small parts and a compact structure. This requires that the design of the fixture must fully consider the versatility of the structure, achieving multiple uses to save space and improve assembly efficiency.

[0006] Furthermore, the weight and complexity of the protruding structure must be minimized in the fixture design to ensure the balance and stability of the entire fixture. This not only helps improve the reliability and durability of the fixture, but also reduces production costs and maintenance difficulties.

[0007] Finally, to improve production efficiency and reduce labor intensity, fixture design must also fully consider operational convenience. By optimizing the fixture's operational flow and structural layout, worker efficiency can be significantly improved and operational difficulty can be reduced during the production process. Summary of the Invention

[0008] In order to solve the problems existing in the background technology, the present invention provides a vacuum brazing fixture for a special-shaped nozzle product with an elbow and a method for using the same.

[0009] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a vacuum brazing fixture for a special-shaped nozzle product with a curved tube, comprising a main board, a nozzle seat fixing assembly, a nozzle fixing assembly, an insulation sleeve fixing assembly, a catheter fixing assembly and a nozzle joint fixing assembly; a special-shaped cavity is provided inside the main board, and the special-shaped cavity includes a central cavity, an upper cavity, a left cavity, a lower cavity and a right cavity, the central cavity is located in the middle of the main board, the central cavity passes through the front and rear side walls of the main board, the upper end of the central cavity is connected with the vertically arranged upper cavity, the upper end of the upper cavity passes through the upper surface of the main board and a nozzle seat fixing assembly is provided in the upper cavity, and the upper end of the main board is provided with a nozzle joint fixing assembly; the left side of the central cavity is connected with the horizontally arranged left cavity, the left end of the left cavity passes through the left side of the main board and a nozzle fixing assembly is provided in the left cavity; the lower end of the central cavity is connected with the vertically arranged lower cavity, the lower end of the lower cavity passes through the lower surface of the main board and a insulation sleeve fixing assembly is provided in the lower cavity; the right end of the central cavity is connected with the inclined right cavity, the right end of the right cavity passes through the right side of the main board and a catheter fixing assembly is provided in the right cavity.

[0010] The nozzle seat fixing assembly includes a positioning shaft, a gasket, a positioning shaft wedge plate, an angular shaft and an angular shaft wedge plate; the left and right sides of the upper cavity are respectively plugged with a vertically set positioning shaft and a vertically set angular shaft, the outer side of the positioning shaft and the outer side of the angular shaft are both equipped with gaskets, the upper end of the positioning shaft is plugged with the positioning shaft wedge plate, the upper end of the angular shaft is plugged with the angular shaft wedge plate, the lower end of the positioning shaft wedge plate and the lower end of the angular shaft wedge plate are respectively pressed tightly against the upper ends of the corresponding gaskets.

[0011] The nozzle fixing assembly includes a slot pin and a slot pin wedge; a horizontally arranged slot pin is inserted into the left cavity, and the left end of the slot pin is inserted into the slot pin wedge.

[0012] The catheter fixing assembly includes a diamond pin and a diamond pin wedge plate; the diamond pin is inserted into the right cavity, and the outer end of the diamond pin is inserted into the diamond pin wedge plate.

[0013] The heat insulation sleeve fixing assembly includes a push pin and a push pin wedge plate; the push pin is inserted into the lower cavity, and the lower end of the push pin is inserted into the push pin wedge plate.

[0014] The nozzle joint fixing assembly includes a support plate, a positioning pin and a positioning pin wedge; an L-shaped support plate is provided on the rear side of the upper end of the main board, the vertical plate of the support plate is plugged into the horizontally arranged positioning pin, and the outer end of the positioning pin is plugged into the positioning pin wedge.

[0015] The present invention provides a method for using a vacuum brazing fixture for a special-shaped nozzle with an elbow, the method comprising the following steps:

[0016] S1: Place the preliminarily assembled product into the mainboard from the upper cavity;

[0017] S2: Insert the positioning shaft and angular shaft into the two holes on the flange of the product nozzle seat respectively;

[0018] S3: Washers are installed on the outside of the positioning shaft and the outside of the angular shaft;

[0019] S4: Push the positioning shaft wedge plate and the angular shaft wedge plate in the positioning shaft respectively;

[0020] S5: Insert the slot pin into the left cavity and position the countersink at its front end at the outer diameter of the nozzle of the product. Position the nozzle by pushing the slot pin wedge.

[0021] S6: Insert the diamond pin into the right cavity, insert its inner end into the heat insulation sleeve of the product and the inner hole of the catheter, and push the diamond pin wedge to press the catheter tightly;

[0022] S7: Insert the ejector pin into the lower cavity and fit its upper end against the outer wall of the thermal insulation sleeve, and press the thermal insulation sleeve tightly by pushing the ejector pin wedge plate;

[0023] S8: Insert the positioning pin into the inner hole of the nozzle joint of the product through the support plate, and press the nozzle joint by pushing the positioning pin wedge plate.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention effectively solves the problem of positioning and pressing of complex product structures through innovative conformal structure design, easy-to-operate wedge-shaped clamping mechanism and multifunctional positioning components, improves assembly efficiency and welding accuracy, simplifies the protruding structure, enhances the balance and stability of the clamp, reduces operation difficulty and production cost, and facilitates disassembly, significantly improving production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 yes Figure 1 DD cross-sectional view;

[0028] Figure 3 yes Figure 2 AA section view;

[0029] Figure 4 yes Figure 2 BB cross-sectional view;

[0030] Figure 5 yes Figure 2 CC cross-sectional view;

[0031] Figure 6 This is a schematic diagram of the connection between the main board and the support board;

[0032] Figure 7 yes Figure 6 Top view of . DETAILED DESCRIPTION

[0033] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] A vacuum brazing fixture for a special-shaped nozzle product with a curved tube, comprising a main board 1, a nozzle seat fixing assembly, a nozzle fixing assembly, an insulation sleeve fixing assembly, a catheter fixing assembly and a nozzle joint fixing assembly; a special-shaped cavity 15 is provided inside the main board 1, and the special-shaped cavity 15 includes a central cavity, an upper cavity, a left cavity, a lower cavity and a right cavity, the central cavity is located in the middle of the main board 1, the central cavity passes through the front and rear side walls of the main board 1, the upper end of the central cavity is connected with the vertically arranged upper cavity, the upper end of the upper cavity passes through the upper surface of the main board 1 and a nozzle seat fixing assembly is provided in the upper cavity, and the upper end of the main board 1 is provided with a nozzle joint fixing assembly; the left side of the central cavity is connected with the horizontally arranged left cavity, the left end of the left cavity passes through the left side of the main board 1 and a nozzle fixing assembly is provided in the left cavity; the lower end of the central cavity is connected with the vertically arranged lower cavity, the lower end of the lower cavity passes through the lower surface of the main board 1 and a insulation sleeve fixing assembly is provided in the lower cavity; the right end of the central cavity is connected with the inclined right cavity, the right end of the right cavity passes through the right side of the main board 1 and a catheter fixing assembly is provided in the right cavity.

[0035] The nozzle holder fixing assembly includes a positioning shaft 2, a washer 4, a positioning shaft wedge 5, an angular shaft 6, and an angular shaft wedge 16. The left and right sides of the upper chamber are respectively connected to the vertically arranged positioning shaft 2 and the vertically arranged angular shaft 6. Washers 4 are mounted on the outer sides of the positioning shaft 2 and the outer sides of the angular shaft 6. The upper end of the positioning shaft 2 is connected to the positioning shaft wedge 5, and the upper end of the angular shaft 6 is connected to the angular shaft wedge 16. The lower ends of the positioning shaft wedge 5 and the lower ends of the angular shaft wedge 16 are respectively pressed and fitted with the upper ends of the corresponding washers 4. Compared with the previous anti-target positioning bolt and nut compression, this structure is simpler to manufacture and easier to operate. At the same time, due to the structural limitations of the mainboard 1, the internal space is relatively narrow, making the anti-target type compression bolt difficult to assemble and operate.

[0036] The nozzle fixing assembly includes a slot pin 11 and a slot pin wedge 12 ; the horizontally arranged slot pin 11 is inserted into the left cavity, and the left end of the slot pin 11 is inserted into the slot pin wedge 12 .

[0037] The catheter fixing assembly includes a diamond pin 7 and a diamond pin wedge plate 8; the diamond pin 7 is inserted into the right cavity, and the outer end of the diamond pin 7 is inserted into the diamond pin wedge plate 8.

[0038] The thermal insulation sleeve fixing assembly includes a push pin 9 and a push pin wedge plate 10 ; the push pin 9 is inserted into the lower cavity, and the lower end of the push pin 9 is inserted into the push pin wedge plate 10 .

[0039] The nozzle joint fixing assembly includes a support plate 3, a positioning pin 13 and a positioning pin wedge 14; an integrally formed L-shaped support plate 3 is provided on the rear side of the upper end of the main board 1, the vertical plate of the support plate 3 is plugged into the horizontally arranged positioning pin 13, and the outer end of the positioning pin 13 is plugged into the positioning pin wedge 14.

[0040] The present invention provides a method for using a vacuum brazing fixture for a special-shaped nozzle with an elbow, the method comprising the following steps:

[0041] S1: Place the preliminarily assembled product into the main board 1 from the upper cavity;

[0042] S2: Insert the positioning shaft 2 and the angular shaft 6 into the two holes on the flange of the product nozzle seat respectively;

[0043] S3: Install washers 4 on the outside of the positioning shaft 2 and the outside of the angular shaft 6;

[0044] S4: Push the positioning shaft wedge plate 5 and the angular shaft wedge plate 16 in the positioning shaft 2 respectively to achieve compression of the product nozzle seat;

[0045] S5: Since many parts need to be assembled and the size is small, there is no extra space for the structure. The structure in the fixture should be multi-purpose. Insert the slot pin 11 into the left cavity and limit the countersink at its front end to the outer diameter of the product nozzle. The nozzle is positioned by pushing the slot pin wedge 12;

[0046] S6: Insert the diamond pin 7 into the right cavity, and insert its inner end into the heat insulation sleeve and the inner hole of the catheter to achieve the positioning of the heat insulation sleeve and the catheter, and push the diamond pin wedge plate 8 to press the catheter;

[0047] S7: Insert the ejector pin 9 into the lower cavity and fit its upper end against the outer wall of the thermal insulation sleeve. Press the ejector pin wedge 10 to tighten the thermal insulation sleeve. At this point, the positioning and tightening of the catheter and the thermal insulation sleeve are completed.

[0048] S8: The nozzle joint's external structure should be simplified by extending the support plate structure. Insert the positioning pin 13 through the support plate 3 into the inner hole of the nozzle joint, ensuring that the larger end of the positioning pin 13 contacts the end face of the nozzle joint to achieve positioning of the nozzle joint. The nozzle joint is then tightened by pushing the positioning pin wedge 14. At this point, all parts of the product are firmly fixed and tightened, allowing welding to proceed to the welding position.

[0049] To facilitate the disassembly of each clamping point after welding is completed, a small hole is processed at the wide end of each wedge plate, through which a tool can be inserted to pull out the wedge plate, making it easier for workers to operate.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0051] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A vacuum brazing fixture for special-shaped nozzles with curved tubes, characterized by: The invention comprises a main board (1), a nozzle seat fixing assembly, a nozzle positioning assembly, a heat insulation sleeve fixing assembly, a catheter fixing assembly and a nozzle joint fixing assembly; a special-shaped cavity (15) is provided inside the main board (1), and the special-shaped cavity (15) comprises a central cavity, an upper cavity, a left cavity, a lower cavity and a right cavity; the central cavity is located in the middle of the main board (1), the central cavity passes through the front and rear side walls of the main board (1), the upper end of the central cavity is communicated with the vertically arranged upper cavity, the upper end of the upper cavity passes through the upper surface of the main board (1) and a nozzle seat fixing assembly is provided in the upper cavity, and the upper end of the main board (1) is provided with a nozzle joint fixing assembly; the left side of the central cavity is communicated with the horizontally arranged left cavity, the left end of the left cavity passes through the left side of the main board (1) and a nozzle positioning assembly is provided in the left cavity; the lower end of the central cavity is communicated with the vertically arranged lower cavity, and the lower end of the lower cavity passes through the lower surface of the main board (1) The lower cavity is provided with a heat-insulating sleeve fixing assembly; the right end of the central cavity is communicated with the inclined right cavity, the right end of the right cavity passes through the right side of the main board (1) and the right cavity is provided with a heat-insulating sleeve and a catheter positioning assembly; the nozzle seat fixing assembly comprises a positioning shaft (2), a washer (4), a positioning shaft wedge plate (5), an angular shaft (6) and an angular shaft wedge plate (16); the left and right sides of the upper cavity are respectively plugged with a vertically arranged positioning shaft (2) and a vertically arranged angular shaft (6), the outer side of the positioning shaft (2) and the outer side of the angular shaft (6) are both provided with washers (4), the upper end of the positioning shaft (2) is plugged with the positioning shaft wedge plate (5), the upper end of the angular shaft (6) is plugged with the angular shaft wedge plate (16), and the lower end of the positioning shaft wedge plate (5) and the lower end of the angular shaft wedge plate (16) are respectively pressed and fitted with the upper end of the corresponding washer (4).

2. The vacuum brazing fixture for special-shaped nozzles with curved tubes according to claim 1, characterized in that: The nozzle positioning assembly comprises a slot pin (11) and a slot pin wedge plate (12); a horizontally arranged slot pin (11) is inserted into the left cavity, and the left end of the slot pin (11) is inserted into the slot pin wedge plate (12).

3. The vacuum brazing fixture for a special-shaped nozzle with an elbow according to claim 2, characterized in that: The catheter fixing assembly comprises a diamond pin (7) and a diamond pin wedge plate (8); the diamond pin (7) is inserted into the right cavity, and the outer end of the diamond pin (7) is inserted into the diamond pin wedge plate (8).

4. The vacuum brazing fixture for a special-shaped nozzle with an elbow according to claim 3, characterized in that: The heat insulation sleeve fixing assembly comprises a push pin (9) and a push pin wedge plate (10); the push pin (9) is inserted into the lower cavity, and the lower end of the push pin (9) is inserted into the push pin wedge plate (10).

5. The vacuum brazing fixture for special-shaped nozzles with curved tubes according to claim 4, characterized in that: The nozzle joint fixing assembly comprises a support plate (3), a positioning pin (13) and a positioning pin wedge (14); an L-shaped support plate (3) is provided on the rear side of the upper end of the main board (1); the vertical plate of the support plate (3) is plugged into the horizontally arranged positioning pin (13), and the outer end of the positioning pin (13) is plugged into the positioning pin wedge (14).

6. A method for using the vacuum brazing fixture for a special-shaped elbow nozzle according to claim 5, characterized in that: The method comprises the following steps: S1: Place the preliminarily assembled product from the upper cavity into the main board (1); S2: Insert the positioning shaft (2) and the angular shaft (6) into the two holes on the flange of the product nozzle seat respectively; S3: Washers (4) are installed on the outside of the positioning shaft (2) and the outside of the angular shaft (6); S4: Push the positioning shaft wedge plate (5) and the angular shaft wedge plate (16) in the positioning shaft (2) respectively; S5: insert the slot pin (11) into the left cavity, and limit the countersink at its front end to the outer diameter of the nozzle of the product, and position the nozzle by pushing the slot pin wedge (12); S6: Insert the diamond pin (7) into the right cavity, insert the inner end of the diamond pin into the heat-insulating sleeve of the product and the inner hole of the catheter, and push the diamond pin wedge plate (8) to press the catheter; S7: inserting the ejector pin (9) into the lower cavity and making its upper end fit against the outer wall of the heat insulating sleeve, and pressing the heat insulating sleeve by pushing the ejector pin wedge plate (10); S8: Insert the positioning pin (13) into the inner hole of the nozzle joint of the product through the support plate (3), and press the nozzle joint by pushing the positioning pin wedge plate (14).

Images