Assembly device provided with a visual reference mark and method for the assembly thereof

A method for assembling pre-bored (15) elements (2;

• 3) by an assembly device (1, 20, 51),
• the elements together having a reference thickness (18) that may vary within a predetermined range (38) between an actual minimum thickness (39) and an actual maximum thickness (40), the device comprising
• a male element (4;
• 21;
• 52) extending along an axis (5;
• 53) and comprising a shank (6;
• 22;
• 54) extending, at a first end (8;
• 23;
• 55), in a head (7;
• 24;
• 56), and at a second end (9;
• 25;
• 57), via a shoulder (10;
• 26;
• 58), in a thread (11;
• 27) or swaging grooves (59),
• an external surface (12;
• 28;
• 60) intended to be in contact with the bore, having a height (13;
• 61) equal to a height (14) of the shank, chosen so as to correspond to at least the actual maximum thickness (40) of the elements to be assembled, and including a grip range selected to be at least equal to the predetermined range (38),
• said external surface having a visual reference mark (16;
• 35;
• 63), such as along the axis (5, 53), said reference mark being located at a distance (17) of a lower limit (9;
• 34;
• 57), or extending over a distance (17) from a lower limit up to an upper limit (42A;
• 42B;
• 65) toward the head, said distance (17) being, at a maximum, the grip range of the device,
• said method comprising the following steps:
• fully inserting the assembly device (1, 20, 51) into the bore,
• visually verifying that an edge (41), formed by a circular intersection between the bore and a bottom surface, is both
• above a lower limit (9;
• 34;
• 57) of the external surface, and
• below the visual reference mark (16;
• 35;
• 63) or an upper limit (42A, 42B, 65) of said reference mark.