基于正逆向混合技术的全面供气式面罩开发

Development of full-air-supplying mask based on combined forward and inverse methods

采用正、逆向混合技术进行全面供气式面罩产品的优化设计。逆向阶段,在获取原产品后,利用非接触结构光测量系统进行点云数据获取。使用Geomagic DesignX逆向软件进行数字点云模型处理。利用网格模型构建并生成最终的NURBS曲面模型,实现产品的快速参数重构及全尺寸检测,为后续正向设计打好基础。根据用户需求分析,将逆向处理后的CAD模型导入正向设计软件中,完成产品创新设计。最后,通过快速成型技术进行零部件试制,大大减少了模具制造周期,降低了生产成本。

A full-air supply mask product was designed and optimized by using combinedforward and reverse methods.In the reverse phase,we firstly analyzed the design intent ofthe original product,then used a non-contact structured light measurement system to obtainthe point cloud data.Geomagic Design X reverse software was used to deal with the digitalpoint cloud model processing.The mesh model was built and used to generate the finalNURBS surface model for realizing the rapid parameter reconstruction and full-size inspectionof the product,which laid a good foundation for the subsequent forward hybrid technologymethods.