关键词: 分层切片, 分层实体制造, 功能零件, 金属造型材料, 热扩散焊接, 故障诊断, 经验模态分解, 局部特征尺度分解, 转子碰摩, 总体平均经验模态分解

Abstract: Aiming at the problem existing in the laminated object manufacturing using metallic modeling materials, a new approach, which cuts the mental sheets by new LOM process and connects them by diffusion weld technology, is put forwarded, and the theoretical error of manufacturing is contrasted between the LOM and new LOM process. The slicing algorithm based on new LOM process is deduced. The follow conclusions are drawn from experiments: the shrinkage in the stack direction is small, the atom-diffusion between two combined interface occurred clearly and new crystallites shaped meanwhile, shearing intension of welding seam is more than 100 Mpa, and micro hardness of the seam is almost the same to matrix’s. Fabricated sample shows that the new LOM process and diffusion weld technology is one of the effective methods for the laminated object manufacturing of metal parts.

Key words: Laminated object manufacturing, Metallic modeling materials　Function parts, Slice sheets　Diffusion weld technology, ensemble empirical mode decomposition, fault diagnosis, local characteristic-scale decomposition, rotor rubbing, empirical mode decomposition