Assembly tolerance analysis for parts with flatness based on virtual mating plane

作者：Tang Shui Long^*; Yu Jian Feng; Li Yuan; Yang Hai Cheng

来源：Computer Integrated Manufacturing Systems, 2011, 17(4): 711-715.

• Aircraft wing
• Flatness
• Micro-motion plane
• Tolerance analysis
• Virtual mating plane

To realize coupling analysis between dimensional tolerance and surface flatness tolerance in plane mating assembly, Virtual Mating Plane (VMP) was established, which realized the parameterized representation by means of micro-motion plane. Based on the VMP, the surface flatness tolerance was decomposed into translation and rotation of the part to assemble in the following step in the reference coordinate system. The translation was calculated by the flatness tolerance, and the rotation angle was determined by the flatness tolerance and the mating plane size. Then, the Global Coordinate System (GCS) of the assembly was established, and a space vector dimension chain was constructed to map the translation and rotation into dimension chain. Therefore, the assembly tolerance analysis in the GCS was finished. Finally, an aircraft wing sub-assembly was chosen to validate the effectiveness of this method.

• 出版日期2011
• 单位西北工业大学