The comparison of rivets and bolts in terms of firmness is not absolute, because they are each suitable for different application scenarios and connection requirements.
1. Connection principle and method
Rivet
Connection principle: Rivets are used to firmly connect two or more objects together through riveting. During the riveting process, the rivet rod will penetrate the object to be connected, and the nail cap will be partially flattened or flanging through tools such as rivet guns, so that the rivet is firmly fixed on the object.
Connection method: Rivets are generally not removable after connection, and are suitable for occasions where permanent connection is required.
Bolt
Connection principle: Bolts connect two or more objects together by cooperating with nuts and using the screwing action of threads. The friction or preload between the bolt and the nut can produce a tightening effect.
Connection method: Bolt connection is detachable and is suitable for occasions that need to be frequently disassembled and replaced.
2. Firmness and application scenarios
Rivet
Firmness: After the rivet is connected, the nail cap is partially flattened or flanging, forming a connection effect similar to welding, with high shear and tensile resistance. Therefore, in some occasions where large tensile and shear forces are required, rivet connections may be stronger.
Application scenarios: Rivets are often used in aerospace, railways, bridges and other places where large loads and vibrations are required.
Bolts
Robustness: The robustness of bolted connections depends on the material, specifications and preload of the bolts and nuts. Under appropriate preload, bolted connections can generate high friction to prevent loose connections.
Application scenarios: Bolts are widely used in machinery, construction, automobiles and other fields, and are important components of machines or structures. Bolted connections are more suitable for occasions where frequent disassembly and replacement are required.
3. Other factors
In addition to the connection principle, robustness and application scenarios, other factors need to be considered, such as cost, convenience of installation and maintenance, etc. In some cases, it may be necessary to consider a variety of factors to select the most appropriate connection method.