Volumes of revolution - Ruled surfaces

Volumes of revolution for objects the shape of which is symmetrical about a central axis. The wheel is a simple example of this type of 3D object. The input is a half outline, or a cross-section through the object, which is rotated about the axis by the modeller, to produce a 3D illustration.

Ruled surfaces is a simple form of modelling, where any two sections or profiles can be joined at all points by straight lines. An airfoil, or a turbine blade is a typical example where this method can be applied. Examples of various methods of CAD modelling are shown in Fig. 3.5.





  • Manual of Engineering Drawing
    Second edition
    Colin H Simmons
    I.Eng, FIED, Mem ASME.
    Engineering Standards Consultant
    Member of BS. & ISO Committees dealing with
    Technical Product Documentation specifications
    Formerly Standards Engineer, Lucas CAV.
    Dennis E Maguire
    CEng. MIMechE, Mem ASME, R.Eng.Des, MIED
    Design Consultant
    Formerly Senior Lecturer, Mechanical and
    Production Engineering Department, Southall College
    of Technology
    City & Guilds International Chief Examiner in
    Engineering Drawing

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