Pull rivets, also known as pull rivets, pull nails, etc., is a commonly used type of rivets.

** 1. Structural characteristics **

The drawing rivet is mainly composed of two parts: the nail rod and the nail sleeve. One end of the nail rod has a pull ring, the other end is a slightly larger diameter of the nail head, the nail sleeve is a hollow cylindrical structure. When the rivet is installed, by pulling the pull ring on the nail rod, the nail rod will be pulled out of the nail sleeve, and the nail head of the nail rod will stretch the nail sleeve under the action of tension, so that it will deform and tightly clamp the connected material, so as to achieve the purpose of connection.

** II. Working principle **

1. ** Installation process **

- First, the draw rivet is inserted into the hole of the material to be joined, the diameter of the hole usually matches the specification of the rivet.

- Then, use a special riveting gun to clamp the pull ring of the nail rod and begin to apply tension. As the tension increases, the nail rod will gradually be pulled out of the nail sleeve.

- When the nail rod is pulled to a certain extent, the nail head will stretch the nail sleeve, and the nail sleeve will be plastic deformed, thus forming a shape similar to the mushroom head on the back of the material, clamping the material in the middle, achieving a strong connection.

2. ** Fastening principle **

- The fastening of drawn rivets mainly depends on the deformation of the nail sleeve. Under the spreading action of the nail head, the nail sleeve will expand to the four sides and closely fit with the hole wall of the connected material, generating great friction. At the same time, the nail head and the deformed nail sleeve will form a "clamp-like" structure on both sides of the material, holding the material firmly. This fastening method can withstand a certain tensile force, shear force and vibration and other external forces to ensure the reliability of the connection.

** Three, advantages **

1. ** Easy installation **

- Compared with the traditional rivet installation method, the installation of the pull rivet does not require operation on the back of the material to be connected, and only requires the use of a pull gun on one side of the material to complete the installation. This is very practical in some cases where space is limited or cannot be operated from the back, greatly improving the installation efficiency.

2. ** High connection strength **

- Properly installed draw-rivets provide a high connection strength, and their clamping force ensures that the connected material will not easily separate. Moreover, the drawing rivet can also maintain good connection performance in vibration and impact and other environments, and is suitable for various occasions where the connection strength is required.

3. ** Good appearance **

After installation, the rivet is formed on the surface of the material is a relatively smooth and neat connection point, there is no protruding part (except the pull end of the nail rod, but the pull ring can be cut after installation), compared with the traditional rivet, its appearance is more beautiful, suitable for the product appearance has certain requirements in the field, such as automobiles, electronic equipment, etc.

4. Wide applicability **

- Pull rivets can be used to connect different materials, such as metal and metal, metal and plastic, plastic and plastic. And for materials with different thicknesses, it can also have better adaptability, as long as the rivets of the right specifications are selected.

** IV. Application field **

1. ** Aerospace field **

- In the interior installation of aircraft, small parts connection and other aspects, pull rivets are widely used because of their advantages of easy installation and reliable connection. For example, the connection of seats, decorative panels and other components in the aircraft cabin requires both a solid connection to ensure flight safety, and the installation process does not affect other structures and systems of the aircraft, and the rivets are well drawn to meet these needs.

2. ** Automobile manufacturing industry **

- The body, chassis, interior and other parts of the car have the application of pulling rivets. In body manufacturing, pulling rivets can quickly connect sheet metal parts of the body and improve production efficiency. In the interior, such as the instrument panel, door interior panel, etc., the installation is also commonly used to pull rivets, and its aesthetic and convenient installation characteristics meet the requirements of automobile manufacturing.

3. ** Electronics industry **

- For the shell assembly of various electronic equipment and electrical products, internal parts connection, pulling rivets is an ideal connection method. It can achieve a solid connection without damaging the electronic components, and can meet the appearance quality requirements of electronic products. For example, the assembly of computer cases, display housings, home appliance housings, etc., may use pull rivets.

4. ** Construction industry **

- In the installation of building curtain walls, aluminum doors and Windows, etc., pulling rivets can connect metal frames and plates together. Its fast installation and high connection strength are helpful to improve the efficiency and quality of building construction. At the same time, in some interior decoration projects, such as the fixing of metal decorative strips, draw rivets will also be used.

5. ** Furniture manufacturing industry **

- Pull rivets can be used to join metal or wood furniture, especially some furniture that requires quick assembly and high appearance requirements. For example, the connecting parts of office furniture, panel furniture, etc., can be drawn rivets, which not only ensures the firmness of the connection, but also makes the appearance of the furniture more neat and beautiful.

To sum up, drawing rivets with its unique structure, working principle and many advantages, have a wide range of applications in many industries, and with the continuous development of technology, its application scope is still expanding.