Outer spray pipe welding tool

Abstract

The utility model relates to the technical field of welding workpiece positioning, in particular to an outer spray pipe welding tool which comprises an inner supporting piece and an outer clamping component used for clamping and fixing an outer spray pipe body and an outer spray pipe welding piece. The inner wall of the outer spray pipe body and one end of the outer spray pipe welding piece are both matched with the outer wall of the universal supporting column, positioning holes in one-to-one correspondence with the mounting holes in the outer spray pipe body are formed in the universal supporting column in the circumferential direction, and positioning pins are assembled in the mounting holes and the positioning holes in the outer spray pipe body. One end of the universal supporting column is detachably connected with the special supporting plate, a first positioning face is arranged on one side of the special supporting plate and used for supporting the inner wall of an outer spraying pipe welding piece, and a second positioning face is arranged on the other opposite side of the special supporting plate and used for supporting the inner wall of an outer spraying pipe body. And the external clamping part is clamped on the outer wall of the supported area of the outer spray pipe welding piece and the outer spray pipe main body. According to the utility model, the resource waste is reduced while the workpiece is positioned.

Description

Technical Field

[0001] The utility model relates to the technical field of welding workpiece positioning, in particular to an external nozzle welding tool. Background Art

[0002] In the process of aircraft development, wind tunnel testing using scaled models is an extremely important research method. Therefore, the processing accuracy and quality of each component of the wind tunnel model are particularly important. For example, the outer nozzle, which is the power source of the aircraft, is difficult to process as a whole due to its complex structure and internal cavity. Therefore, it is usually formed by welding the outer nozzle body and the outer nozzle weldment.

[0003] At present, due to the thin wall thickness of the outer nozzle (about 2mm), the positioning of the workpiece is mostly achieved by internal support plus external clamping. In the prior art, the internal support is usually a whole, and each outer nozzle of different specifications needs to be processed with a set of internal supports. However, the inner cavity of outer nozzles of different specifications usually only differs in shape at the outer nozzle weldment and the end of the outer nozzle body close to the outer nozzle weldment. Processing a set of internal supports for each outer nozzle of different specifications causes serious waste of resources. Therefore, how to achieve workpiece positioning while reducing resource waste is an urgent problem to be solved. Utility Model Content

[0004] The utility model aims to provide an external nozzle welding tool, which can realize workpiece positioning and reduce resource waste.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] An external nozzle welding tool comprises an internal support member and an external clamping member for clamping and fixing an external nozzle body and an external nozzle welding member, wherein the internal support member comprises a universal support column and a special support plate, the inner wall of the external nozzle body and one end of the external nozzle welding member are both matched with the outer wall of the universal support column, the universal support column is provided with positioning holes corresponding to the mounting holes on the external nozzle body in a one-to-one manner along the circumferential direction, and the mounting holes and the positioning holes on the external nozzle body are equipped with positioning pins;

[0007] One end of the universal support column is detachably connected to the special support plate, and a first positioning surface is provided on one side of the special support plate for supporting the inner wall of the outer nozzle welding part, and a second positioning surface is provided on the other opposite side of the special support plate for supporting the inner wall of the outer nozzle body; the external clamping component clamps the outer wall of the supported area of ​​the outer nozzle welding part and the outer nozzle body.

[0008] Optionally, a connecting plate is provided at one end of the universal support column, a first limiting slot with the same thickness as the special support plate is provided at the end of the connecting plate, a second limiting slot with the same thickness as the connecting plate is provided on the special support plate, and the special support plate and the connecting plate are cross-connected through the first limiting slot and the second limiting slot.

[0009] Optionally, the universal support column is provided with a third limiting slot on the end surface of one end of the connecting plate, and the dedicated support plate is provided with a positioning boss that cooperates with the third limiting slot.

[0010] Optionally, welding seam clearance grooves are provided on both sides of the connecting plate.

[0011] Optionally, a cylindrical surface for making way is provided in the middle of the universal support column, and the diameter of the cylindrical surface for making way is smaller than the inner diameter of the outer nozzle body.

[0012] Optionally, an identification groove is provided at one end of the universal support column for marking the assembly direction of the outer nozzle welding part.

[0013] Optionally, a threaded pin-pulling hole is provided at the outer end of the locating pin.

[0014] Optionally, the external clamping component includes a C-shaped clamping seat, one end of the C-shaped clamping seat is provided with a fixed clamping block, the other end of the C-shaped clamping seat is provided with a movable clamping block, the movable clamping block is connected to a connecting screw, and the connecting screw is threadedly connected to the C-shaped clamping seat.

[0015] The technical solution of the present utility model has at least the following advantages and beneficial effects: in the present utility model, the internal support member limits the radial position of the outer nozzle body and the outer nozzle welding member, the positioning pin limits the axial position of the outer nozzle body, and the external clamping member defines the relative position of the outer nozzle body and the outer nozzle welding member, thereby achieving good positioning of the workpiece; at the same time, the internal support member is composed of a universal support column and a special support plate that are detachably connected. For outer nozzles of different specifications, the universal support column can be shared, and only different special support plates need to be replaced, thereby saving resources. It can be seen that the present utility model reduces resource waste while achieving workpiece positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A diagram showing the use status of an external nozzle welding tool provided by the utility model;

[0018] Figure 2 It is a schematic diagram of the assembly structure of the universal support column and the special support plate;

[0019] Figure 3 It is a schematic diagram of the exploded structure of the universal support column and the special support plate;

[0020] Icons: 1-universal support column, 101-matching surface, 102-yielding cylindrical surface, 103-positioning hole, 104-marking groove, 105-connecting plate, 106-weld yielding groove, 107-first limiting slot, 108-third limiting slot, 2-special support plate, 201-first positioning surface, 202-second positioning surface, 203-positioning boss, 204-second limiting slot, 3-positioning pin, 301-threaded pin hole, 4-external clamping component, 401-C-type clamping seat, 402-fixed clamping block, 403-movable clamping block, 404-connecting screw, 5-external nozzle body, 6-external nozzle welding part. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] refer to Figure 1-3 An external nozzle welding tool comprises an internal support member and an external clamping member 4, wherein the internal support member comprises a universal support column 1 and a special support plate 2, and one end of the universal support column 1 is detachably connected to the special support plate 2.

[0024] The inner wall of the outer nozzle body 5 and one end of the outer nozzle welding piece 6 are matched with the outer wall of the universal support column 1. The universal support column 1 is provided with positioning holes 103 corresponding to the mounting holes on the outer nozzle body 5 along the circumferential direction. The mounting holes on the outer nozzle body 5 and the positioning holes 103 are equipped with positioning pins 3. During assembly, the outer nozzle body 5 is sleeved on the universal support column 1 to achieve radial positioning, and at the same time, the mounting holes on the outer nozzle body 5 are aligned with the positioning holes 103 on the universal support column 1, and the positioning pins 3 are inserted to achieve axial positioning of the outer nozzle body 5.

[0025] After the outer nozzle body 5 is fixed to the universal support column 1, the outer nozzle is welded and overlapped at the welding position. At the same time, the end of the outer nozzle welding part 6 is matched with the end of the universal support column 1 to achieve radial positioning. In order to facilitate assembly, an identification groove 104 is provided at one end of the universal support column 1 in this embodiment to mark the assembly direction of the outer nozzle welding part 6. The position of the identification groove 104 is not specifically limited as long as it is convenient for the operator to identify the assembly direction.

[0026] A first positioning surface 201 is provided on one side of the special support plate 2 for supporting the inner wall of the outer nozzle welding part 6, and a second positioning surface 202 is provided on the other opposite side of the special support plate 2 for supporting the inner wall of the outer nozzle body 5. The external clamping component 4 clamps the outer wall of the supported area of ​​the outer nozzle welding part 6 and the outer nozzle body 5.

[0027] During use, the universal support column 1 can be shared for external nozzles of different specifications, and only different special support plates 2 need to be replaced, thus saving resources. It can be seen that the tooling provided by the utility model not only realizes the positioning of the workpiece, that is, controls the welding deformation and can ensure the welding quality, but also makes part of the structure of the internal support component universal, reducing waste of resources.

[0028] It is worth noting that the design of the positioning hole 103 of this embodiment shares the mounting hole on the outer nozzle body 5, which not only achieves the positioning function, but also does not add extra holes on the outer nozzle. Furthermore, the outer end of the positioning pin 3 of this embodiment is provided with a threaded pin extraction hole 301, which is convenient for pulling out the positioning pin 3 after welding is completed by using tools such as a screwdriver. It should be understood that in actual applications, the positioning pin 3 can be designed to be a step-shaped with one end large and the other end small, the small end serving as a positioning section that cooperates with the positioning hole 103 and the mounting hole, and the large end providing sufficient space for machining the threaded pin extraction hole 301.

[0029] In the present embodiment, a cylindrical surface 102 is provided in the middle of the universal support column 1, and the diameter of the cylindrical surface 102 is smaller than the inner diameter of the outer nozzle body 5, that is, the two ends of the support column are mating surfaces 101 for positioning, and the diameter of the cylindrical surface 102 is about 0.2 mm smaller than the diameter of the mating surface 101. This design can avoid the situation where the outer nozzle body 5 is slightly deformed after welding and is difficult to pull out.

[0030] On the basis of the above, the manner in which the universal support column 1 and the special support plate 2 are detachably connected in this embodiment is as follows: a connecting plate 105 is provided at one end of the universal support column 1, and the connecting plate 105 can be integrally formed with the universal support column 1, and weld clearance grooves 106 are provided on both sides of the connecting plate 105. The weld clearance grooves 106 are arranged at the axial weld to prevent the welding tooling from adhering to the external nozzle.

[0031] The end of the connecting plate 105 is provided with a first limit slot 107 with the same thickness as the special support plate 2, and the special support plate 2 is provided with a second limit slot 204 with the same thickness as the connecting plate 105. The special support plate 2 and the connecting plate 105 are cross-connected through the first limit slot 107 and the second limit slot 204. Interference fit is adopted during connection, which is convenient for disassembly and can fix the position of the two. In actual applications, the special support plate 2 can be made of aluminum alloy and polished to achieve a hard fit while minimizing excessive wear on the first limit slot 107 and the second limit slot 204, thereby improving positioning accuracy.

[0032] Furthermore, the universal support column 1 is provided with a third limit slot 108 on the end face of one end of the connecting plate 105, and the special support plate 2 is provided with a positioning boss 203 that cooperates with the third limit slot 108. When the special support plate 2 is connected to the universal support column 1, the positioning boss 203 is inserted into the third limit slot 108 to improve the positioning reliability.

[0033] It should be understood that the detachable connection between the universal support column 1 and the special support plate 2 in this embodiment is only an option, not a limitation. In some embodiments, other methods can also be used to achieve detachable connection between the two, such as positioning the two by pins and then connecting and fixing the two by screws.

[0034] The specific structure of the external clamping component 4 of this embodiment is as follows: the external clamping component 4 includes a C-shaped clamping seat 401, one end of the C-shaped clamping seat 401 is provided with a fixed clamping block 402, the other end of the C-shaped clamping seat 401 is provided with a movable clamping block 403, the movable clamping block 403 is connected to a connecting screw 404, and the connecting screw 404 is threadedly connected to the C-shaped clamping seat 401. In actual applications, a butterfly handle can also be provided at the end of the connecting screw 404 to facilitate the rotation of the connecting screw 404.

[0035] In this embodiment, the fixed clamp block 402 clamps the outer wall of the area where the outer nozzle body 5 is supported by the dedicated support plate 2, and the movable clamp block 403 clamps the outer wall of the area where the outer spray welding part is supported by the dedicated support plate 2. It should be understood that in other embodiments, the clamping positions of the fixed clamp block 402 and the movable clamp block 403 can also be exchanged. In addition, in other embodiments, the external clamping component 4 can of course also adopt other structures in the prior art.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An external nozzle welding tool, comprising an internal support member and an external clamping member (4) for clamping and fixing an external nozzle body (5) and an external nozzle welding member (6), characterized in that: The internal support member comprises a universal support column (1) and a special support plate (2); the inner wall of the outer nozzle body (5) and one end of the outer nozzle welding member (6) are both matched with the outer wall of the universal support column (1); the universal support column (1) is provided with positioning holes (103) corresponding to the mounting holes on the outer nozzle body (5) along the circumferential direction; the mounting holes on the outer nozzle body (5) and the positioning holes (103) are equipped with positioning pins (3); One end of the universal support column (1) is detachably connected to the special support plate (2); a first positioning surface (201) is provided on one side of the special support plate (2) for supporting the inner wall of the outer nozzle welding part (6); a second positioning surface (202) is provided on the other opposite side of the special support plate (2) for supporting the inner wall of the outer nozzle body (5); and the external clamping component (4) clamps the outer wall of the supported area of ​​the outer nozzle welding part (6) and the outer nozzle body (5).

2. The outer nozzle welding tool according to claim 1, characterized in that: A connecting plate (105) is provided at one end of the universal support column (1); a first limit slot (107) having the same thickness as the special support plate (2) is provided at the end of the connecting plate (105); a second limit slot (204) having the same thickness as the connecting plate (105) is provided on the special support plate (2); the special support plate (2) and the connecting plate (105) are cross-connected via the first limit slot (107) and the second limit slot (204).

3. The outer nozzle welding tool according to claim 2, characterized in that: The universal support column (1) is provided with a third limit slot (108) on the end surface of one end of the connecting plate (105), and the dedicated support plate (2) is provided with a positioning boss (203) that cooperates with the third limit slot (108).

4. The outer nozzle welding tool according to claim 2, characterized in that: Welding seam clearance grooves (106) are provided on both sides of the connecting plate (105).

5. The outer nozzle welding tool according to any one of claims 1 to 4, characterized in that: A cylindrical surface (102) is provided in the middle of the universal support column (1), and the diameter of the cylindrical surface (102) is smaller than the inner diameter of the outer nozzle body (5).

6. The outer nozzle welding tool according to any one of claims 1 to 3, characterized in that: One end of the universal support column (1) is provided with an identification groove (104) for identifying the assembly direction of the outer nozzle welding part (6).

7. The outer nozzle welding tool according to any one of claims 1 to 3, characterized in that: The outer end of the positioning pin (3) is provided with a threaded pin-pulling hole (301).

8. The outer nozzle welding tool according to any one of claims 1 to 3, characterized in that: The external clamping component (4) comprises a C-shaped clamping seat (401), one end of the C-shaped clamping seat (401) is provided with a fixed clamping block (402), the other end of the C-shaped clamping seat (401) is provided with a movable clamping block (403), the movable clamping block (403) is connected to a connecting screw (404), and the connecting screw (404) is threadedly connected to the C-shaped clamping seat (401).

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