Welding fixture capable of meeting requirements of different welding positions
By designing welding fixtures suitable for different welding positions, the problems of welding deviation caused by manual alignment and the need for multiple sets of tooling for auxiliary positioning were solved, achieving an efficient and reliable welding process and adapting to the positioning needs of complex-shaped parts.
Patent Information
- Application Number
- CN202520350018.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-28
AI Technical Summary
In current aircraft manufacturing, the welding of product shells and base plates relies on manual alignment, which is inefficient and prone to welding deviations. Traditional processes require multiple sets of tooling for positioning and fixing, increasing costs and complexity.
Design a welding fixture that includes a base, a positioning mechanism, and a clamping mechanism. Employ an inverted L-shaped flat pressure plate, an elastic adaptive layer, a thermal expansion self-compensation structure, and a buffer layer to achieve automatic positioning and stable clamping, replacing manual alignment and adapting to different welding position requirements.
It improves welding precision, reduces production costs, simplifies operation procedures, increases production efficiency, and adapts to the positioning needs of complex-shaped parts.
Smart Images
Figure CN223819977U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a welding fixture satisfying different welding position requirements belongs to welding fixture technical field. BACKGROUND
[0002] In the field of aviation manufacturing, the welding of product shells and bottom plates is an important process link in building aircraft structures. Existing welding techniques face a series of challenges in this process. Specifically, the current operation mode mainly relies on manual alignment to achieve accurate positioning of the shell and the bottom plate. This manual operation not only is inefficient, but also is extremely susceptible to human factors, leading to welding deviations from time to time. Welding deviations not only affect the appearance quality of the product, but more importantly, they can pose a potential threat to the overall structural strength of the aircraft and flight safety.
[0003] In addition, for aviation parts with complex shapes and multiple pipe opening position requirements, traditional welding processes often need to use multiple tooling sets for auxiliary positioning and fixing. The design, manufacture, and replacement of these tooling sets not only increase production costs, but also make the entire welding process more cumbersome and time-consuming. At the same time, the use of multiple tooling sets also increases the operation complexity and reduces the production efficiency, which is not conducive to quickly responding to market demand and reducing manufacturing costs. SUMMARY
[0004] To solve the problems in the background art, the utility model provides a welding fixture that can satisfy different welding position requirements.
[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a welding fixture that can satisfy different welding position requirements, comprising a base, a positioning mechanism, and a pressing mechanism; the upper end of the base is provided with the positioning mechanism and the pressing mechanism; the pressing mechanism comprises a plane pressing plate and a plane pressing plate bolt; the plane pressing plate is of inverted L-shaped structure, the lower end of the vertical plate of the plane pressing plate is in contact with the upper surface of the base, the horizontal plate of the plane pressing plate is used for pressing the bottom plate of the product, the horizontal plate of the plane pressing plate is provided with a waist-shaped groove one, the waist-shaped groove one is provided with the plane pressing plate bolt, and the lower end of the plane pressing plate bolt is threadedly connected with the base; the positioning mechanism comprises an outer sleeve and a positioning plate; the outer sleeve is placed in the outer shell of the product, the outer sleeve is arranged in close contact with the inner side wall of the outer shell, the bottom surface of the outer sleeve is provided with a waist-shaped groove two, and the positioning plate is placed on the bottom surface of the outer sleeve; the positioning plate is threadedly connected with a positioning plate bolt, and the positioning plate bolt is arranged in the waist-shaped groove two and threadedly connected with the base at the lower end.
[0006] The upper end of the base is provided with a plurality of transverse grooves and a plurality of longitudinal grooves, and the plane pressing plate bolts are arranged in the corresponding transverse grooves or longitudinal grooves.
[0007] The contact surface of the flat pressing plate is provided with an elastic self-adapting layer.
[0008] The contact surface of the flat pressing plate is provided with a thermal expansion self-compensation pressing structure.
[0009] The waist-shaped groove is internally provided with a buffer layer.
[0010] The upper end of the outer sleeve is provided with a lifting handle.
[0011] The lifting handle is hinged to the outer sleeve.
[0012] Compared with the prior art, the beneficial effects of the present application are:
[0013] The present application replaces manual alignment welding, solves the problem of welding deviation, effectively solves the problem of multiple sets of tooling required for welding at different positions by adjusting the positioning mechanism at different positions, fills the industry gap, avoids the problem of multiple sets of tooling auxiliary positioning and fixing in the traditional process, reduces the production cost, improves the production efficiency, and simplifies the welding process, and provides an efficient and reliable solution for product shell and bottom plate welding in the field of aviation manufacturing. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is a structural schematic view of the present application;
[0015] Figure 2 is a structural schematic view of the positioning mechanism;
[0016] Figure 3 is a structural schematic view of the pressing mechanism;
[0017] Figure 4 is a structural schematic view of the outer sleeve. DETAILED DESCRIPTION
[0018] The technical solutions in the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0019] A welding fixture that can meet the requirements of different welding positions includes a base 1, a positioning mechanism 2, and a clamping mechanism 5. The upper end of the base 1 is provided with the positioning mechanism 2 and the clamping mechanism 5. The clamping mechanism 5 includes a flat pressure plate 9 and a flat pressure plate bolt 10. The flat pressure plate 9 has an inverted L-shaped structure. The lower end of the vertical plate of the flat pressure plate 9 contacts the upper surface of the base 1. The horizontal plate of the flat pressure plate 9 is used to clamp the bottom plate 4 of the product. The horizontal plate of the flat pressure plate 9 is provided with a waist-shaped groove. The flat pressure plate bolt 10 is provided in the waist-shaped groove. The lower end of the flat pressure plate bolt 10 is threaded to the base 1. The positioning mechanism 2 includes an outer sleeve 6 and a positioning plate 8. The outer sleeve 6 is placed inside the outer shell 3 of the product. The outer side wall of the outer sleeve 6 is fitted with the inner side wall of the outer shell 3. The bottom surface of the outer sleeve 6 is provided with a waist-shaped groove. The positioning plate 8 is placed on the bottom surface of the outer sleeve 6. A positioning plate bolt is screwed onto the positioning plate 8. The positioning plate bolt is located in the waist-shaped groove and its lower end is threaded to the base 1.
[0020] When using this utility model, the base plate 4 of the product is clamped by the clamping mechanism 5, and then the outer shell 3 of the product is moved to the desired position on the base plate 4 by the moving outer sleeve 6. After that, the positioning plate bolts are tightened, and the outer shell 3 and the base plate 4 are positioned by the positioning plate 8 and then welded.
[0021] The upper end of the base 1 is provided with multiple transverse grooves and multiple longitudinal grooves extending through its thickness direction. The flat plate bolts 10 are respectively set in the corresponding transverse grooves or longitudinal grooves to realize the transverse / longitudinal movement of the flat plate 9. It can be finely adjusted according to the base plate 4 of different sizes and shapes, increasing versatility and flexibility.
[0022] The contact surface of the planar pressure plate 9 is provided with an elastic adaptive layer (such as a spring array / air cushion structure). When pressing the base plate 4 of different thicknesses, the elastic adaptive layer automatically compensates for the gap through deformation, avoids local stress concentration, and maintains uniform pressing force.
[0023] The contact surface of the flat pressure plate 9 is provided with a thermal expansion self-compensating clamping structure, such as a bimetallic strip compensation layer. When the equipment operates in a high-temperature environment, the bimetallic strip bends towards the base plate 4 to offset the decrease in clamping force caused by the thermal expansion of the metal material. Under low-temperature conditions, the compensation layer returns to a flat state to avoid overpressure. The clamping force fluctuation rate is reduced to within ±3%; the applicable temperature range is extended to -20℃ to 120℃.
[0024] The waist-shaped groove is equipped with a buffer layer (rubber damping layer or hydraulic buffer) to absorb the impact vibration when the positioning plate bolts are tightened, and reduce the risk of mechanism loosening caused by high-frequency vibration.
[0025] A handle 7 is installed at the upper end of the outer sleeve 6.
[0026] The handle 7 is hinged to the outer sleeve 6 and is designed to be foldable for storage. When not in use, the handle 7 can be stored away to reduce the space occupied by the equipment.
[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A welding fixture capable of meeting the requirements of different welding positions, characterized in that: The system includes a base (1), a positioning mechanism (2), and a pressing mechanism (5); the upper end of the base (1) is provided with the positioning mechanism (2) and the pressing mechanism (5), and the pressing mechanism (5) includes a flat pressing plate (9) and a flat pressing plate bolt (10); the flat pressing plate (9) has an inverted L-shaped structure, the lower end of the vertical plate of the flat pressing plate (9) contacts the upper surface of the base (1), the horizontal plate of the flat pressing plate (9) is used to press the bottom plate (4) of the product, and the horizontal plate of the flat pressing plate (9) is provided with a waist-shaped groove, and the flat pressing plate bolt (10) is provided in the waist-shaped groove. 10), the lower end of the flat plate bolt (10) is threadedly connected to the base (1); the positioning mechanism (2) includes an outer sleeve (6) and a positioning plate (8); the outer sleeve (6) is placed inside the outer shell (3) of the product, the outer side wall of the outer sleeve (6) is fitted with the inner side wall of the outer shell (3), the bottom surface of the outer sleeve (6) is provided with a waist-shaped groove II, the bottom surface of the outer sleeve (6) is provided with a positioning plate (8), a positioning plate bolt is screwed on the positioning plate (8), the positioning plate bolt is set in the waist-shaped groove II and its lower end is threadedly connected to the base (1).
2. The welding fixture according to claim 1, which can meet the requirements of different welding positions, is characterized in that: The upper end of the base (1) is provided with multiple transverse grooves and multiple longitudinal grooves, and the flat plate bolts (10) are respectively set in the corresponding transverse grooves or longitudinal grooves.
3. A welding fixture according to claim 2 that can meet the requirements of different welding positions, characterized in that: The contact surface of the flat pressure plate (9) is provided with an elastic adaptive layer.
4. A welding fixture according to claim 2 that can meet the requirements of different welding positions, characterized in that: The contact surface of the flat pressure plate (9) is provided with a thermal expansion self-compensating pressing structure.
5. A welding fixture according to claim 3 or 4 that can meet the requirements of different welding positions, characterized in that: The waist-shaped groove 2 is provided with a buffer layer.
6. A welding fixture according to claim 1 that can meet the requirements of different welding positions, characterized in that: A handle (7) is installed at the upper end of the outer sleeve (6).
7. A welding fixture according to claim 6 that can meet the requirements of different welding positions, characterized in that: The handle (7) is hinged to the outer sleeve (6).