Shape deposition manufacturing (SDM) is a solid freeform fabrication (SFF) process that systematically combines the advantages of layered manufacturing with the advantages of material removal processes. The basic SDM fabrication methodology is to deposit individual segments of a part, and of support material structure, as near-net shapes, then machine each to net shape before depositing and shaping additional material. This method takes advantage of the basic SDM decomposition strategy which is to decompose shapes into segments or compacts, such that undercut features need not be machined, but formed by depositing onto previously deposited and shaped segments. Each compact in each layer is deposited as a near-net shape using one of several available deposition processes. The thickness of each compact depends not only on the local part geometry, but also on deposition process constraint
| Number of Pages : | 7 |
| Published : | 11/01/2000 |
