Numerical Methods and Descriptive Geometry Methods for Unfoldings Determination

The calculation of the unfoldings surfaces has many practical applications, especially in the connection pipes of equal or different sizes. The work has the role of establishing a pipeline of an industrial installation, with a known configuration, composed by cylindrical, conical and prismatic surfaces. This paper, based on methods of descriptive geometry, gives all the necessary information to obtain the unfoldings and after that, by using numerical analysis, there are presented some algorithms used in developing the piece.