Abstract: In order to solve the requirement of adding suspension structure for parts in
Stereolithography, an algorithm of automatic generation of suspension structure is proposed. Firstly,
identified and extracted various suspension region of the entity model. Then, the projection plane in
the direction of the processing is discretized into a grid by using the discrete identification method
based on the area. At last, according to the suspension structure stress load condition, uniform
sampling is used to obtain the points and the corresponding suspension structure is designed. Finally
in the Visual studio 2013 development platform combined with VTK to achieve it. The experimental
results show that the algorithm is correct and feasible, and it has been successfully used in practical
machining.

Key words: stereolithography, suspension structure, discrete identification method, stress