rapit prototyping

RAPID PROTOTYPING AND TOOLING

MODEL SLICING

THE PART IS DIVIDED INTO SLICES

REASONS FOR USING DIRECT SLICING

•Reduced file Size (Over-faceted Models);

•Greater Model Accuracy;

•Reduced RP Machine Pre-processing Time;

•Elimination Of Repair Routines

DISADVANTAGES OF DIRECT SLICING

•Supports Cannot Easily Be Added To Nested Sections.

•Beam Compensation And Offsets Still Require Processing.

•More Designer Knowledge Is Required

TOOL PATH GENERATION

TOOL PATH GENERATION

• To generate and control the tool direction and speed in part manufacturing

• Two different approaches to generate the tool path

• Normal surface and offset surface, approximation are always used to the offset surface

TOOL PATH ALGORITHM

• The tool path generation algorithm is to efficient tool path to machine object surfaces, classified tool path generation into isoperimetric and non-isoperametric paths. the accuracy of the surface depends on the desired tolerance.

SURFACES

• A three dimensional curved line Can be represented in an analytical form With the pair of functions:

Y = f (x) Z = g(x)

• Can then be represented by the Vector function:P(u) = (x(u), y(u), z(u))

The parameter (u) is defined in The range from [0 to 1]

Parametric equations for surfaces are Formulated with two parameters [ u and v], A coordinate position on a surface are Then represented by the parametric vector Function:

P(u,v)=(X(u,v),Y(u,v),Z(u,v)In design applications, a surface is often defined by interactively specifying a set of control points which indicate the surface.

THANKING YOU