Page 73 - MSAM-2-4

Materials Science in Additive Manufacturing Base shape generation for HAM

Figure 18B. Then, a plane cutting and an extrusion cutting 4.2. Case study 2
operations were performed as post-processing to make the The CAD model described in the above case is not so
base shape meet the coplanar criterion and approximate to complex that we can even identify the optimal base shape
the subpart shape of the original CAD model, as illustrated based on our experiences. However, HAM is usually
in Figure 18C. Figure 18D illustrates the subparts, which used in complex and high-value manufacturing, through
need to be deposited through the CS AM module onto the which complex models are often made. In this case, we
optimized base shape. For this case, it is obvious that if the used a more complex CAD model to demonstrate the
CS deposition can start from the proposed optimal base
shape, a lot of materials and much processing time could
be saved.

A B

Figure 14. (A and B) Bracket computer-aided design model with different
perspectives.
Figure 17. The optimization process of base shape with Particle Swarm
Optimization.
A B
A B

C D

Figure 15. (A) Voxelization and original skeleton of the computer-aided
design model and (B) modified skeleton.

A B

Figure 18. (A) Optimal initial skeleton; (B) optimal base shape;
(C) optimal base shape; and (D) remaining subparts for CS AM module.

Figure 16. (A and B) Subparts of the bracket. Figure 19. The computer-aided design model of case study 2.

Volume 2 Issue 4 (2023) 10 https://doi.org/10.36922/msam.2103