Fabricating a plate of large thickness including a detachable card of small thickness

A tooling for fabricating a plate of large format and of large thickness including a card of small format and small thickness that is detachable from the plate, wherein the tooling comprises:

• spotfacing means suitable for making a spotface in a first face of the plate, the spotface being of a depth equal to the difference between the large thickness and the small thickness;
• a leveling punch suitable for performing leveling punching in a spotface zone in a leveling direction facing a second face of the plate opposite from the first face, through a leveling stroke equal to the depth of the spotface, in order to bring the bottom of the spotface level with the first face of the plate, the leveled bottom forming a leveled zone;
• and
• pre-cutting means suitable for pre-cutting an outline of the card within the leveled zone, in order to make the card detachable.