Method of manufacture of a false - frame or under - unitary assembly, and under - unitary assembly corresponding.

摘要

The method involves inserting data into software, and determining efforts and moments. A torque is calculated using the data, and the efforts and the moments. Thickness of longitudinal sections are restituted according to the torque to obtain resistance of elements of a sub-frame (6) by preparing hot galvanized fine sheets and by stacking, fixing and reversing the sheets between them with a digital control machine carrying out precision necessary for reversible fixation points or to form the sections presenting the thickness corresponding to geometrical moment of inertia and the resistance. An independent claim is also included for a unitary sub-assembly forming a sub-frame based on longitudinal sections adaptable to frames of commercial road vehicle or heavy vehicle.