Analysis of the step movements sequence of the RO-3M virtual press for shaping a sheet blank

It is revealed that the rigid surface binding of the skin shell parts to the contour of the aircraft does not allow us to study some surfaces properties associated with their internal geometry, regardless of the three-dimensional space of the aircraft itself. In the case of specifying the shell part surface of the cladding with lines of curvature as conjugate orthogonal coordinate lines, the shape of the tight punch can be characterized through the internal geometry of the shell surface. The system of symmetry forms proposed by us allows to create a stable process of forming a tight sheet blank and provide a more rational kinematic scheme on the RO-3M stretch-tight press.