An Ergonomics Model and Posture Improvement for Grinding Workers Based on an Improved DMAIC Approach

doi:10.3969/j.issn.1007-7375.230195

Abstract

Abstract: In order to improve the working posture of grinding workers and reduce the risk of developing work-related musculoskeletal disorders (WMSDs), an experimental study is carried out on the working postures of grinding workers in the pressure vessel workshop of a pharmaceutical equipment company. Based on the DMAIC model, a DMASIEC work improvement model is proposed which adds simulation (S) verification analysis in the improvement (I) stage and execution (E) analysis in the control (C) stage. Using the Xsens MVN motion capture system and the Jack TAT tool in a synchronized joint analysis method, an immersive real-world experiment for job posture improvement based on physiological signals and subjective evaluation indicators is designed and carried out. Through the simulation verification of grinding postures using Jack, a guideline for improving grinding worktable and operations is proposed to reduce work fatigue. Results show that the pressure on the L4/L5 spines of grinding workers is about 1/4 of the original pressure when performing the same task, and all working posture ratings are AC1; significant changes (P ＜ 0.05) in sEMG and HRV fatigue indicators are observed in three workers after transitioning from a squatting to a sitting posture; the improved worktable and operational guidance contribute to mitigating the adverse effects of working posture on the musculoskeletal system.

Key words: ergonomics, DMAIC model, surface elecromyography, heart rate variability, Jack simulation

CLC Number:

TB18
F428

GUO Chundong, LI Yunhao, YAN Shuo, SHEN Lin. An Ergonomics Model and Posture Improvement for Grinding Workers Based on an Improved DMAIC Approach[J]. Industrial Engineering Journal, 2024, 27(5): 53-63.

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