Implementation of lean initiatives to minimise defects in a forging enterprise

This research addresses the implementation of the lean philosophy in a forging environment where hot forging operations are performed. In this paper, the authors have kept their prime focus on reducing various forging defects such as under-filling, overlap, etc. in the connecting rod production flow line. After giving a brief on the lean paradigm, a systematic approach is suggested for the implementation of the lean manufacturing principles. An analysis of the various critical process parameters has been carried out with the help of Taguchi's method of Design of Experiment (DOE). To save time and to make the analysis more precise and cost effective, a simulation exercise using finite element analysis is also performed. Furthermore, the results obtained are tested on the shop floor and it is realised that the defect levels have reduced significantly. Future courses of improvement are recommended. Consequently, the idea of an automatic billet flow control mechanism between the furnace and the press with a temperature indicator is advocated.