Enhancing Productivity and Minimizing Welding Defects in Steel MeshManufacturing through the Implementation of a Physical Poka-Yoke Device
DOI:
https://doi.org/10.26439/ing.ind2026.n50.8628Keywords:
poka-yoke, electric welding, five whys, productivity, optimization, lean manufacturingAbstract
This study assesses the implementation of a physical poka-yoke device on an electric welding machine used for producing steel mesh wire production at WMC (Wire Mesh Corp). The goal is to eliminate defects caused by improper transverse wire insertion and to enhance productivity. A quantitative field study was conducted using Lean Manufacturing methodologies, including the 5 Whys technique for root cause analysis and structured checklists for continuous monitoring. This poka-yoke device was engineered to reinforce the transversal support mechanism, thereby ensuring wire stability and preventing deformation during welding. The results demonstrated a 100 % elimination of defective meshes and a 23,68 % increase in productivity. Prior to the implementation, defect rates averaged 39,5 % per shift, accompanied by recurrent machine downtime. Following the installation, all produced meshes adhered to quality specifications, with no defects detected during the evaluation period. These findings affirm that simple, cost-effective error-proofing mechanisms can significantly optimize manufacturing processes within the steel industry, providing a replicable framework for future industrial poka-yoke applications.
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