Permutation Flow Shop Scheduling Optimization with Batch Heat Treatment for Gear Manufacturing
Year: 2026
Type: conference-paper
Abstract: In gear manufacturing, workpieces pass through forging, turning, hobbing, carburizing and quenching, and finish grinding. The carburizing furnace is a batch processing machine (BPM) with fixed cycle time, intrinsically coupling discrete stages upstream and downstream. This paper studies the permutationconstrained flow-shop scheduling problem with embedded batch processing (PFSP-BPM) to isolate the sequencing-batching coupling. A mixed-integer linear programming (MILP) model is developed to jointly minimize makespan and total carbon emissions; explicit linearization renders it directly solvable by commercial solvers. Correctness is verified via exhaustive enumeration on 16 instances and$\varepsilon$-constraint Pareto-front analysis. Experiments reveal a parameter-dependent Pareto trade-off, while exact optimality becomes difficult to certify beyond$n=8$. Decoupledbaseline results further show that permutation and batching decisions are structurally non-separable: optimizing either in isolation forfeits synergy gains of$4.7 \%-7.7 \%$.
Language: English
Subfield: Industrial and Manufacturing Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7214769413
