Improvement of Structure Stiffness for Bridge TypeMachining Center Using Cross-Rib Design

• Main Authors: Feng-Wei Fu, 傅豐椲
• Other Authors: Wu-Yao Chiou
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/29544144836803577999

碩士 === 國立高雄應用科技大學 === 模具工程系 === 99 === This study used finite element method (FEM) for strengthening the main structure of bridge type machining center. The improvement of the structure stiffness with the idea of cross-ribs and analysis of casting CAE was verified. The bridge type machining center is including gantry, table, spindle housing, bed, and so on. In manufacturing process cutting loading have to be covered by the structure of gantry, also call the load of “structure stiffness.” The main point of this research is that the design of cross-ribs will improve structure stiffness and reduce deformation in the same force conditions. In analysis the deformation of bed will be reduced to 40.67%, on heaving cutting test, deformation of gantry reduce to 20.12%. Except the improvement of structure stiffness for cross-ribs design, then the casting model is analyzed by Cast CAE to simulate the cross-ribs design in actual casting process. After analysis of casting simulation, in order to reduce shrinkage the risers are added in position of shrinkage to reach the feasibility of actual founding.