The working principle of rivets is mainly to achieve connection through deformation. Specifically, the working principle of rivets can be divided into the following steps:
First, preparation
1. Select the right rivets: Select the right rivets according to the material, thickness and required strength of the connected object.
2. Prepare tools: according to the type of rivet to prepare the corresponding tools, such as hammer, rivet gun.
3. Clean the surface: ensure that the connection surface is clean, smooth, and free of oil or other stains to improve the riveting quality.
Second, the installation process
1. Place the rivet: Place the rivet in the prefabricated hole of the part or member that needs to be connected, ensuring that the rivet is closely fitted to the hole wall.
Step 2 Apply pressure:
– Manual or pneumatic riveting: The use of hammer, rivet gun and other tools to apply pressure to the head or tail of the rivet, so that the rivet plastic deformation.
– Pull riveting: During the pull riveting process, the rivets are deformed by special tools (such as pull riveting guns) and the riveted parts are riveted together. The rivet gun uses manual or compressed air as power to deform special rivets through special tools.
– Punch riveting: also known as the press riveting process, through the plastic deformation of the rivet or part after the force to connect the parts. Whether the rivet deformation or material deformation, the press riveting process is a cold heading process.
– Rotary riveting: The riveting method using a rivet rod to apply partial pressure to the rivet and swing continuously around the center until the rivet is formed. According to the different trajectory of cold grinding, it can be divided into pendulum riveting method and radial riveting method.
Third, deformation connection
1. Tail deformation: Under the action of pressure, the tail of the rivet (or rod) is plastic deformation, and the diameter increases, so as to fill the gap between the prefabricated hole and the rivet, forming a close mechanical connection.
2. The head shape: in some riveting method, rivet head deformation will occur, to form a specific shape (e.g., convex circle), in order to enhance robustness and stability of the connection.
Fourth, complete the connection
1. Fixed connection: Through the deformation of rivets, two or more parts or components are firmly connected together.
2. Check the quality: After the riveting is completed, it is necessary to check the quality of the connection to ensure that the connection between the rivets and the parts or components is tight and firm.
Fifth, the working principle of special rivets
For some specially designed rivets, such as self-locking rivets, core-pulling rivets, etc., the working principle may be different. For example, a core-pulling rivet works by pulling the core head with an inside-out force with the help of a rivet gun, causing the rivet to expand and secure to the connector.
In short, the working principle of rivets is to achieve connection through deformation. Different types of rivets and different riveting methods may vary, but the basic principles are similar. In practical applications, appropriate rivets and riveting methods need to be selected according to factors such as the material, thickness and required strength of the connected object.
