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Rivets are mechanical fasteners used to connect two or more workpieces. Unlike fasteners such as nails and screws, rivets are used to permanently fix workpieces. After the workpiece is fixed, the rivet or workpiece needs to be damaged in order to separate the fixed workpiece. The method of fixing or joining workpieces with rivets is called "riveting". Rivets can be seen as hemispherical screws without threads.
When the willow nail is not installed, it is a cylinder with a protrusion at one end. During fixation, rivets longer than the workpiece are selected. During fixation, the tail of the rivet is inserted into the pre processed hole of the workpiece. Due to the long length of the rivet, the tail will protrude a small section of the workpiece. Finally, a tool is used to hammer the protruding part of the tail, which will expand to about 1 or 5 times the original diameter of the rivet. At this time, both sides of the rivet have protruding heads, which can fix the workpiece.
Commonly used are semi round head, flat head, countersunk head rivets, pop rivets, and hollow rivets, which usually use their own deformation to connect the riveted parts. (Generally, cold riveting is used for sizes smaller than 8mm, and hot riveting is used for sizes larger.) However, there are exceptions, such as the nameplate on the three ring lock, which is riveted using the interference between the rivet and the lock body hole.
