Riveting machine
The riveting machine (or riveting press ) is a mechanical device for making rivets and for carrying out rivets.
They are designed to be portable as they are used for bridge building, steam boilers, shipbuilding, etc. A typical riveting machine contains two dies , one of which forms the counter-shape of the setting head of the rivet and serves as a support, while the other contains the hollow shape to be given to the closing head. Both punches are connected to each other like pliers and when riveting are pressed against the intermediate rivet - usually heated to glow - with the help of a small hydraulic press mounted on the pliers legs .
Stationary riveting machines have also been used in vehicle and aircraft construction for around 30 years. With increasing series production, numerous manual riveting operations are replaced, and z. B. made the production of aircraft more economical.
Furthermore, automatic riveting machines and new riveting processes (pressing instead of pneumatic hammering) significantly reduce the workload for employees. In aircraft construction, such riveting systems are primarily used to attach longitudinal stiffeners ( stringers ) to partial shells, from which fuselage sections and, at the end, fuselages of the aircraft are then produced - likewise with automatic riveting systems.
The rivets used here have a diameter of approx. 3 - 16 mm and are inserted and locked using hydraulic or more modern electrical tools. The closing takes place with so-called full rivets as mentioned above for bridge construction. In aircraft construction, two-part rivets are also often used, in which a collar is placed on the cylindrical rivet part pushed through the bore, which is screwed or squeezed and thus closes the rivet.
Modern riveting machines carry out a complete process fully automatically and program-controlled: drilling, adding sealant if necessary, inserting rivets and sealing rivets.