Research on flexible transfer line schematic design using hierarchical process planning

This paper proposes an approach to a bidding-based flexible transfer line (FTL) schematic design system. The architecture of the flexible transfer line schematic design system (FTLSDS) is established. The system consists of four processes: part feature modeling, process planning, FTL facility layout and FTL evaluation. For FTL schematic design, a five-level process planning strategy named the hierarchical process planning method is proposed. This method includes the selection of the manufacturing feature machining operation, part set-up planning, feature sequencing, operation sequencing and process plan generating. The major decision relies on set-up planning. The framework of the machine modular design system to support machine requirement design for FTL is implemented. In the process of evaluation, quality, flexibility, reliability, machine load, and cost are taken into account.