Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography

Welding, a key technology in the shipbuilding industry, is mostly performed by hand, owing to the complex structure and shape of production blocks. This manual welding requires a variety of working postures, which have become an important determinant of the worker’s workload and, consequently, assem...

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Autores principales:	So-Yeon Baek, Jong-Ho Nam
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	welding factor working posture standard welding position electromyography muscle activity shipbuilding assembly process Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/1a342b38310b4d52afd1df4b6a19b566
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spelling	oai:doaj.org-article:1a342b38310b4d52afd1df4b6a19b5662021-11-25T18:04:22ZPhysical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography10.3390/jmse91112112077-1312https://doaj.org/article/1a342b38310b4d52afd1df4b6a19b5662021-11-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1211https://doaj.org/toc/2077-1312Welding, a key technology in the shipbuilding industry, is mostly performed by hand, owing to the complex structure and shape of production blocks. This manual welding requires a variety of working postures, which have become an important determinant of the worker’s workload and, consequently, assembly man-hours. Currently, major shipyards calculate welding man-hours by reflecting the welding factor, which is defined as the working time consumed in the welding process. A set of welding factors is known to be based on the accumulated experience in shipyards, whereas the verification or derivation process for these factors is not disclosed or available. This study proposed a method for quantitatively calculating work difficulty for welding positions based on the working posture in a process where the posture acts as an important variable. Standard welding positions reflecting the actual welding work at shipyards were established. A physiological assessment method was used to propose the physical welding factor by analyzing the measured muscle activity. The validity of the proposed method was verified by comparing the results of a musculoskeletal simulation package and shipyard welding factors. The proposed method can be readily applied to other fields in which workers’ physical activities are involved.So-Yeon BaekJong-Ho NamMDPI AGarticlewelding factorworking posturestandard welding positionelectromyographymuscle activityshipbuilding assembly processNaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1211, p 1211 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	welding factor working posture standard welding position electromyography muscle activity shipbuilding assembly process Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
spellingShingle	welding factor working posture standard welding position electromyography muscle activity shipbuilding assembly process Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 So-Yeon Baek Jong-Ho Nam Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography
description	Welding, a key technology in the shipbuilding industry, is mostly performed by hand, owing to the complex structure and shape of production blocks. This manual welding requires a variety of working postures, which have become an important determinant of the worker’s workload and, consequently, assembly man-hours. Currently, major shipyards calculate welding man-hours by reflecting the welding factor, which is defined as the working time consumed in the welding process. A set of welding factors is known to be based on the accumulated experience in shipyards, whereas the verification or derivation process for these factors is not disclosed or available. This study proposed a method for quantitatively calculating work difficulty for welding positions based on the working posture in a process where the posture acts as an important variable. Standard welding positions reflecting the actual welding work at shipyards were established. A physiological assessment method was used to propose the physical welding factor by analyzing the measured muscle activity. The validity of the proposed method was verified by comparing the results of a musculoskeletal simulation package and shipyard welding factors. The proposed method can be readily applied to other fields in which workers’ physical activities are involved.
format	article
author	So-Yeon Baek Jong-Ho Nam
author_facet	So-Yeon Baek Jong-Ho Nam
author_sort	So-Yeon Baek
title	Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography
title_short	Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography
title_full	Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography
title_fullStr	Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography
title_full_unstemmed	Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography
title_sort	physical welding factors for reclassified welding positions in shipbuilding assembly process based on muscle activity measured by surface electromyography
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1a342b38310b4d52afd1df4b6a19b566
work_keys_str_mv	AT soyeonbaek physicalweldingfactorsforreclassifiedweldingpositionsinshipbuildingassemblyprocessbasedonmuscleactivitymeasuredbysurfaceelectromyography AT jonghonam physicalweldingfactorsforreclassifiedweldingpositionsinshipbuildingassemblyprocessbasedonmuscleactivitymeasuredbysurfaceelectromyography
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Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography

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