钛板下颌假体的柔性化三维曲面展开与快速冲压成形工艺研究

针对现有定制化钛合金下颌假体的精铸加工周期长的问题。提出了一种快速冲压成形具有柔性化三维结构的钛板下颌假体的方法。以曲率变化大的颏部缺损为对象，结合有限元分析确定钛板下料的最佳初始结构和冲压加工过程的变形条件，研究该类下颌假体的冲压成形工艺性结构设计和分析方法。基于增材制造及其快速模具的树脂壳体／金属树脂填料冲压模具具有高效、低成本的特点；所完成的三维下颌假体表面质量良好，结构尺寸平均偏移量为0．5mm，证明柔性化结构的下颌假体可采用效率更高、成本更低的钣金冲压加工方法。提出了完整的冲压加工工艺路线．对下颌修复的实际应用具有一定的指导意义。

Blank Design and Rapid Stamping Forming Process of Titanium Sheet Metal for Mandibular Prosthesis with the Three-dimensional Flexible Surface Structure

The precise casting machining cycle is too long to develop customized titanium mandibular prosthesis; thus, a rapid stamping forming technique using a sheet titanium metal to form a flexible three-dimensional structure of mandibular prosthesis was developed in this study. The process design of the mandibular prosthesis to repair the chin defects with the large curvature change was to be designed and optimized through the finite element analysis of the feeding structure and the processing deformation of the titanium sheet metal. The additive manufacturing technology was applied to manufacture a set of stamping dies using the resin shells and the metal sand and resin composite filling. The mandibular prostheses by stamping forming process had the well quality of the surface and and the structure deformation with about 0.5 mm average offset, which proved that the sheet metal stamping forming process promised a new low cost and high efficient method to manufacture mandibular prosthesis with complex structure. An entire route of the sheet stamping forming process presented in this study is significant to the customized mandibular prosthesis application.