In response to the problems of inconsistent assembly accuracy and low assembly efficiency in the assembly of space gear transmission mechanisms,a datum flow chain(DFC)was used to analyze the three-dimensional variation bildup of space gear transmission mechanisms.The basic principle of the DFC was introduced and its engineering application process was performed.The analysis results indicated that the assembly of typical gear transmission mechanisms takes the tangency and co-planarity of gears as the key characteristics at the assembly level,and the constraints are conveyed by the connective components of gear mechanism sequentially,forming a closed information chain.Using homogeneous transform matrices and variation matrices based on component assembly feature coordinates as the benchmark,the three-dimensional variation bildup calculation of the gear transmission mechanism was achieved.
space gear transmission mechanismDFCassemblydeviation
NETL
NSTL
万方数据
维普
