niittausmenetelmä

Niittausmenetelmä, known in English as riveting, is a metal joining process that uses rivets to fasten two or more parts together. A rivet is a semi-permanent mechanical fastener consisting of a smooth cylindrical shaft with a head on one end. The shaft is inserted through holes drilled in the parts to be joined, and the other end, known as the tail, is deformed or "upset" so that it expands and creates a second head, thus clamping the parts together.

There are various types of rivets and riveting methods. Common types include solid rivets, which require the tail to be deformed with force, and blind rivets (also known as pop rivets), which can be installed from one side, making them useful when access to the back of the joint is limited. The deformation of the rivet tail can be achieved through various tools, such as manual rivet guns, pneumatic rivet guns, or hydraulic riveting tools. The choice of method depends on factors like the material being joined, the size of the rivet, and the required strength of the joint.

Riveting is a widely used technique in various industries, including aerospace, automotive, construction, and manufacturing. It is favored for its reliability, durability, and ability to join dissimilar materials. While welding has replaced riveting in some applications, riveting remains a crucial joining method for many structural and mechanical assemblies where vibration resistance and ease of disassembly are important considerations. The process is relatively simple to learn and perform, making it accessible for both industrial and amateur applications.