A decomposition-accumulation model for layered manufacturing fabrication

A mathematical model to describe the principle of layered manufacturing and layered fabrication error is presented in this paper. In this model, the l ayered manufacturing process is characterized by the model decomposition an d material accumulation. A 3D design model is represented by a set of point s with sequence functions to correlate the layered processing information. Iso-sequence planes are defined as the processing layers to collect points with the same processing sequence and to define the material accumulation a long its gradient direction. Examples of using the proposed model to descri be the layered manufacturing to process flat and no-flat surfaces and the d escription of the layered processing error are also presented.