The invention belongs to
assembly structure division in the field of
assembly sequence planning, and particularly relates to a method for automatically dividing sub-assemblies, which comprises the following specific steps of: 1, acquiring six interference matrixes of an
assembly in the direction of an overall coordinate axis; 2, acquiring a static interference matrix, namely a connection matrix, of the assembly; 3, performing C + +
programming on the connection matrix and the gravity direction interference matrix, and generating a
support matrix based on an intersection taking mode; 4, firstly defining a basic part of the assembly body by utilizing the
support matrix based on an actual assembly site; step 5, dividing sub-assemblies based on the
support matrix; and 6, for the obtained sub-assemblies and basic parts, the assemblies are defined into an assembly hierarchy tree form conforming to an assembly site. The invention defines a sub-assembly division method based on an actual assembly site, the method can be used as a reference in a subsequent assembly
sequence planning process, the assembly sequence of the sub-assembly
layers can be planned firstly, and then the sequence of parts in each sub-assembly is planned.