fissaggio

Fissaggio is the process of fixing or securing components and elements to prevent movement or separation. In engineering, construction, and manufacturing, it covers techniques used to connect parts to a base or to one another, ensuring stability, alignment, and load transfer.

Methods of fissaggio can be mechanical, adhesive, or a combination of both. Mechanical fasteners include bolts, screws, nuts, rivets, anchors, and pins, often used with washers or spacers to distribute loads. Clamping and interference fits (press fits) are also common. Adhesive fissaggio relies on bonding agents such as epoxies, polyurethane, or cyanoacrylates. Other methods include welding, soldering, and brazing for permanent metal joins. Fissaggio can be temporary (ease of disassembly for maintenance) or permanent (long-term fixation).

Design and selection considerations include the type of load (tension, shear, bending, or a combination), load distribution, material compatibility, corrosion resistance, temperature effects, and vibration or fatigue. Accessibility for inspection and maintenance, as well as safety requirements, are also important. Proper material selection and fastening geometry help prevent loosening, wear, or failure over time. Anti-loosening measures, such as locking washers, thread lockers, or expansion anchors, may be used where appropriate.

Applications span machinery, automotive, aerospace, civil engineering, furniture, and electronics assembly. Standards and guidelines governing fissaggio exist at national and international levels, including organizational norms (UNI, EN, ISO) and industry-specific specifications. Documentation of the chosen fissaggio method, load calculations, and inspection criteria is generally required for quality control and safety compliance.