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What is riveting? How many kinds of riveting are there? What are the characteristics and scope of application of each riveting?
1. Ordinary riveting
Ordinary riveting technology is simple, the method is mature, the connection strength is stable and reliable, and the application range is wide. The connector is severely deformed.
Ordinary riveting is widely used in various components and parts of the engine body. Among them, the semi-circular head rivet and the flat cone head rivet are used to connect the internal mechanism of the engine body and the skin with low aerodynamic shape requirements, the countersunk head rivet is mainly used to connect the skin with high aerodynamic shape requirements, and the large flat round head rivet is used to connect the skin with low aerodynamic shape requirements and the fuel tank compartment.
2. Sealing riveting
The characteristic of sealing riveting is that it can eliminate the structural gap and block the leakage path. The working procedure is complex, and the laying of sealing material should be carried out at a certain construction temperature and humidity.
It is used to seal the required parts and structures into the integral fuel tank, airtight cockpit, etc.
3. Special riveting
High riveting efficiency and simple operation; Can adapt to the special requirements of the structure; Rivet has complex structure, high manufacturing cost and narrow application range, and riveting failure is not easy to eliminate.
It can be used for parts with special structural requirements, and can also be used for repair and troubleshooting.
4. Interference fit
Long fatigue life, can seal the nail hole, and fundamentally improve the riveting quality. However, the precision of rivet hole is high, and the fit clearance between nail and Comte is strict before riveting.
Used for parts with high fatigue resistance or sealing requirements.
5. Manual riveting method
Simple tools, convenient operation and low efficiency.
Sometimes used for small parts, tray nuts and double countersunk riveting.
6. Impact riveting method
Suitable for all kinds of riveting structures, even closed and complex structures, riveting fashion accessories can be in various positions and States; Compared with pressure riveting, it has poor quality stability, low efficiency and high noise.
Used for riveting ordinary rivets, riveting ring groove rivets and riveting high shear rivets. 7. Positive riveting method
Compared with the reverse riveting method, the riveting deformation is small, the skin surface quality is good, the labor intensity is high, the efficiency is low, and the application scope is limited by the structure.
It is used for countersunk riveting and interference fit riveting of ordinary rivets with high requirements on skin surface quality.
8. Reverse riveting method
Wide application range, light top handle (relative to the quality of the top handle being riveted), which can make the parts stick together, and the riveting deformation is large, and there will be local subsidence around the rivet head in serious cases.
Mainly suitable for sealing riveting of closed parts of structures, and coated with sealant.
9. Riveting method
Simple operation and high efficiency, but the riveting quality is not stable enough.
Used for single-sided riveting, such as riveting ring groove rivets, threaded core-pulling high-shear rivets, threaded hollow rivets, stretching core-pulling rivets, bulging core-pulling rivets, etc.
10. Riveting method
The nail rod can uniformly upset and fill the nail hole, with stable quality, good surface quality, high efficiency and good working conditions. Its application scope is limited by the structure. Due to the continuous improvement of hand-held riveting machine and riveting die, its application scope is expanding.
It is used for flat cone riveting and countersunk riveting of components with good opening (such as ribs, frames, beams, plates, etc.). ).
1 1. Automatic drilling and riveting method
Riveting has high quality, high efficiency, good working conditions, complicated equipment and expensive price.
It is suitable for interference fit riveting of headless rivets, riveting of upsetting rivets and riveting of core-pulling rivets. It is also used for riveting ordinary rivets.
12. Stress wave riveting method
In the riveting process, rivet materials flow synchronously in all directions, that is, the filling of rivet holes and the formation of rivet heads are completed synchronously, so relatively uniform interference can be formed. Its fatigue life is equal to or higher than that of headless rivet interference fit riveting. When riveting, there is no need for finishing holes and large-tonnage riveting machines, and the workpiece deformation is small. However, the equipment is complicated, the service life is short, the noise is high and the application is not convenient enough.
Riveting titanium alloy, high temperature alloy, alloy steel rivets and large diameter rivets which are difficult to form by hand, and riveting carbon fiber epoxy composite materials can also be used for interference fit riveting with high fatigue resistance.
13. Hot riveting method
Upsetting is easy to form, not easy to crack, better than cold riveting, and the tools and equipment are more complicated. Used for riveting titanium alloy rivets.
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