Research on assembly cost evaluation for assembly sequence planning

An assembly cost evaluation model for assembly sequence planning is proposed, in which the assembly cost is based on the changing times of assembly direction during assembling process and the total motion uncertainty degree of parts. A method based on assembly direction matrix to calculate the changing times of assembly direction is submitted. The motion uncertainty degree of parts is calculated based on the benchmark of assembling. An inference method based on the assembly precedence relation matrix is adopted to verify the feasibility of the assembly sequence and the assembly intervene numbers in an assembly sequence are yielded. At last, the validity of proposed model is verified.