Abstract
Reconfigurable manufacturing systems (RMS) are designed for adjustable production capabilities to cope with the fluctuating market demand. This adjustable capability and customised flexibility are offered by the modular Reconfigurable Machine Tools (RMTs), considered as the key component of an RMS. The main objective of this work is to develop a new approach to jointly consider the setup and process plan constraints. Indeed, based on the relationships between the operations to perform, a integrated setup and process plan is generated, minimising the total cost, including cost of processing, tolerance, setup change and tool module. The proposed new hybrid genetic algorithm-based approach is conducted in two stages. In the first stage, a heuristic is developed for the generation of setups and the assignments of fixtures to each set of operations. While in the second stage, a genetic algorithm is proposed to determine the best process plan to associate with the generated setup plan, under the economic cost consideration. A numerical experiment is performed to show the applicability and the efficiency of the developed approach. A test results highlight the economic gain of the simultaneous consideration of setup and process planning.
Highlights
Due to the challenges like globalisation, rapid technological advancement, saturation of products, environmental changes and uncertainty in market change, the manufacturing system design are needed to evolve
For the first operation, O p1 in setup1, the candidates reconfigurable machine tools (RMTs) are given in the Table 14: R M T1 with tool module T M12 and R M T2 with tool module T M22
Setup cluster remains the same and RMT changes from R M T1 to R M T3, because O p9 is different from O p2 and R M T1 doesn’t have the tool module to perform the O p9
Summary
Due to the challenges like globalisation, rapid technological advancement, saturation of products, environmental changes and uncertainty in market change, the manufacturing system design are needed to evolve . LGIPM, Université de Lorraine, 57000 Metz, France the abrupt change in market demand, need for personalised products, the smart technologies of industry 4.0 concept, help NGMS in shift from mass production towards the mass customisation. In this respect, Koren (2006) defined a manufacturing system called reconfigurable manufacturing system (RMS), which combines the strengths of flexible and dedicated manufacturing systems, by using the technologies of industry 4.0, in order to make the system more responsiveness towards uncertain changes. While modular reconfigurable fixtures are designed, for holding specific part family, which help in the capacity adjustment of the production system for specific product family (Bejlegaard et al 2018)
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