System for checking the presence of thickness restrictions on at least one mechanical component and method for checking them

Method for checking the presence of thickness restrictions on at least one mechanical component (1) obtained by molding, the method comprising the steps of:

• a) picking up said mechanical component (1) from a production line (200);
• b) fixing said mechanical component (1) to a base (2) in a plurality of fixing points (L1, L2, L3);
• c) measuring the thickness of said mechanical component (1) next to at least one control point (P) of said mechanical component to be checked;
• wherein said step c) comprises the step of c1) moving at least one mechanical robotic arm (30) in the direction of said at least one control point (P), wherein said mechanical robotic arm (30) comprises at least one ultrasonic probe (31) for measuring the thickness of said mechanical component next to said at least one control point (P), and the step of c2) positioning said ultrasonic probe in the proximity of said at least one control point (P) so that the ultrasonic wave emitted by said ultrasonic probe (31) travels along a direction (Q) substantially orthogonal to the plane (T) tangent to the surface (S) of said mechanical component (1) next to said at least one control point (P), and the step of c3) detecting the thickness of said at least one mechanical component at said control point (P), characterized in that said method comprises the step of d1) prearranging the three-dimensional solid model (300) of said mechanical component (1), the step of d2) using, as three-dimensional references for said solid model (300), the space coordinates of said plurality of fixing points (L1, L2, L3) so that said control point (P) of said mechanical component coincides with a digital control point (P′) of said three-dimensional solid model, the step of d3) calculating the plane (T′) tangent to the surface (S′) of said three-dimensional solid model (300) of said mechanical component (1) next to said digital control point (P′) on said three-dimensional solid model (300), and the step of d4) calculating the direction (Q′) orthogonal to said plane (T′) tangent to the surface (S′) of said three-dimensional solid model (200) of said mechanical component (1), said step c2) being carried out by said mechanical arm on the basis of the information obtained during said steps d1) to d4) so that said direction (Q) substantially orthogonal to said plane (T) tangent to the surface (S) of said mechanical component (1), next to said at least one control point (P), coincides with said direction (Q′) orthogonal to said plane (T′) tangent to the surface (S′) of said three-dimensional solid model (300) of said mechanical component (1), at said digital control point (P′) on said three-dimensional solid model (300).