Dimensions of the professional gesture of deburrers when using a collaborative cobot: a challenge to preventing MSDS

In the foundry sector, deburring consists of removing residual defects from the surface of a part in particular by grinding. This task is associated with the occurrence of musculoskeletal disorders (MSD). In order to prevent MSDs, collaborative robotics solutions are being developed. However, few studies to date have examined the integration of the various dimensions of professional gestures as a key to understanding the use of cobots to prevent MSDs. We propose that one of the challenges of preventing MSDs when using a cobot lies in understanding the professional gesture and designing an environment conducive to its development. In activity-centered ergonomics, the analysis of the professional gesture makes it possible to consider the link between the different dimensions – biomechanical, cognitive and psycho-social – of the gesture and its performance in the work situation. The purpose of this article is to show how, with a view to preventing Re: soumission manuscritMSDs, the biomechanical, cognitive and psychosocial dimensions of the professional gesture change when a cobot is used. The cobot considered in this study is a restraint-free physical assistance robot operated by the worker during grinding tasks. The methodology is based on semi-directive interviews, observations, interviews at the workstation and individual self-confrontations sessions with 5 operators. This article highlights the value of analyzing professional gestures to understand the effects of cobot use and to identify potential changes in the work environment to support MSD prevention.