关键词: 复杂钣金件, 工序规划, 状态传递, 逆向推理, 组合表示

Abstract: To solve the problem of difficult and inefficient process planning for complex sheet metal parts,an efficient process planning algorithm based on reverse state transfer was proposed.To minimize the number of bend feasibility tests,the concept of bending feasibility state and the transfer mechanism of state in successive bending processes was proposed,and the state data was used as experience to fully utilize and avoid loss,so as to reduce a large number of repeated detection of bending feasibility commonly found in traditional process planning.Considering the different influence of the shape complexity of sheet metal parts on the bending feasibility,the reverse reasoning method from final forming to part blank was adopted to reduce the invalid bending feasibility detection.To escape the influence of the factorial growth of the solution space caused by the increase of the number of bends,the combination representation of experience was used to avoid repeated bending feasibility detection.The experimental results showed that the proposed algorithm could efficiently obtain all feasible bending processes of complex sheet metal parts,which laid a foundation for obtaining the optimal bending process through evaluation and optimization.

Key words: complex sheet metal part, process planning, status transfer, backward reasoning, combination representation