Wire Frame Modeling

Published by engineernews on

     Wireframe modeling is the simplest geometric modeling techniques used to represent the engineering object. It is also called line modeling (or) Edge representation modeling.
     Wire Frame model consists of point, arc, circles, comics, and curves. Wire Frame model looks like a wire which is bent to follows the object edge to generate the model.
Wire Frame Model with Linear Edge:
     Wire Frame models with linear edges consist of a straight line
Segments joining pair of points. For example, Tetrahedron consists of four points in space with six linear edges joining pairs of these points are shown in the figure. The geometry of the tetrahedron is represented by a vertex list giving the (X, Y, Z) coordinates of its vertices.

Vertex List
Edge list
Edge type
V1 (0,0,0)
E1 (V1, V2)
Linear
V2 (0,0,1)
E2 (V2, V3)
Linear
V3 (1,0,0)
E3 (V3, V4)
Linear
V4 (0,1,0)
E4 (V1, V3)
Linear
E5 (V1, V4)
Linear
E6 (V2, V4)
Linear
Wire Frame Model with Curvilinear edge:
     Many objects have curved boundaries. They are best represented in wireframe with curved and linear edges. Cone is the simplest curvilinear wireframe model. This consists of a single Apex point and a circular base. The Apex is jointed to the base by an infinite set of straight-line segments called generators.

     In representing the geometry of the cone, the simplex vertex list contains three vertices-Apexes (V1) and two other vertices, one on either end of diameter across the circular base.
     The edge list contains four edge –two linear edges from apex to base and two semicircular edges forming the circular base.
Vertex list
Edge list
Edge type
V1 (0,0,1)
E1 (V1, V2)
Linear
V2 (-1,0,0)
E2 (V1, V3)
Linear
V3 (1,0,0)
E3 (V2, V3)
Semicircular
E4 (V3, V2)
Semicircular
Application of Wire Frame Modeling:
I. View the model from any vent age point.
II. Generate standard orthographic and auxiliary views automatically.
III. Generate exploded and perspective views easily.
IV. Analyze spatial relationships, including the shortest distance between corners and edge and check for interferences.
V. Reduce the number of prototypes required.
Advantages of wireframe modeling:
1) It is easy to construct.
2) It requires less memory space.
3) It needs less time.
4) It does not require more training for uses.
Disadvantages of wireframe modeling:
i. More confusion while presentation.
ii. It is not possible to calculate mass properties such as mass, volume, a moment of inertia, etc.
iii. It is not suitable for the representation of complex solids.
iv. It is not used for the NC tool path generation.

2 Comments

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