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A Robotic grinding station based on an industrial manipulator and vision system

Due to ever increasing precision and automation demands in robotic grinding, the automatic and robust robotic grinding workstation has become a research hot-spot. This work proposes a grinding workstation constituting of machine vision and an industrial manipulator to solve the difficulty of positio...

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Detalles Bibliográficos
Autores principales: Wan, Guoyang, Wang, Guofeng, Fan, Yunsheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7990196/
https://www.ncbi.nlm.nih.gov/pubmed/33760891
http://dx.doi.org/10.1371/journal.pone.0248993
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author Wan, Guoyang
Wang, Guofeng
Fan, Yunsheng
author_facet Wan, Guoyang
Wang, Guofeng
Fan, Yunsheng
author_sort Wan, Guoyang
collection PubMed
description Due to ever increasing precision and automation demands in robotic grinding, the automatic and robust robotic grinding workstation has become a research hot-spot. This work proposes a grinding workstation constituting of machine vision and an industrial manipulator to solve the difficulty of positioning rough metal cast objects and automatic grinding. Faced with the complex characteristics of industrial environment, such as weak contrast, light nonuniformity and scarcity, a coarse-to-fine two-step localization strategy was used for obtaining the object position. The deep neural network and template matching method were employed for determining the object position precisely in the presence of ambient light. Subsequently, edge extraction and contour fitting techniques were used to measure the position of the contour of the object and to locate the main burr on its surface after eliminating the influence of burr. The grid method was employed for detecting the main burrs, and the offline grinding trajectory of the industrial manipulator was planned with the guidance of the coordinate transformation method. The system greatly improves the automaticity through the entire process of loading, grinding and unloading. It can determine the object position and target the robotic grinding trajectory by the shape of the burr on the surface of an object. The measurements indicate that this system can work stably and efficiently, and the experimental results demonstrate the high accuracy and high efficiency of the proposed method. Meanwhile, it could well overcome the influence of the materials of grinding work pieces, scratch and rust.
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spelling pubmed-79901962021-04-05 A Robotic grinding station based on an industrial manipulator and vision system Wan, Guoyang Wang, Guofeng Fan, Yunsheng PLoS One Research Article Due to ever increasing precision and automation demands in robotic grinding, the automatic and robust robotic grinding workstation has become a research hot-spot. This work proposes a grinding workstation constituting of machine vision and an industrial manipulator to solve the difficulty of positioning rough metal cast objects and automatic grinding. Faced with the complex characteristics of industrial environment, such as weak contrast, light nonuniformity and scarcity, a coarse-to-fine two-step localization strategy was used for obtaining the object position. The deep neural network and template matching method were employed for determining the object position precisely in the presence of ambient light. Subsequently, edge extraction and contour fitting techniques were used to measure the position of the contour of the object and to locate the main burr on its surface after eliminating the influence of burr. The grid method was employed for detecting the main burrs, and the offline grinding trajectory of the industrial manipulator was planned with the guidance of the coordinate transformation method. The system greatly improves the automaticity through the entire process of loading, grinding and unloading. It can determine the object position and target the robotic grinding trajectory by the shape of the burr on the surface of an object. The measurements indicate that this system can work stably and efficiently, and the experimental results demonstrate the high accuracy and high efficiency of the proposed method. Meanwhile, it could well overcome the influence of the materials of grinding work pieces, scratch and rust. Public Library of Science 2021-03-24 /pmc/articles/PMC7990196/ /pubmed/33760891 http://dx.doi.org/10.1371/journal.pone.0248993 Text en © 2021 Wan et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Wan, Guoyang
Wang, Guofeng
Fan, Yunsheng
A Robotic grinding station based on an industrial manipulator and vision system
title A Robotic grinding station based on an industrial manipulator and vision system
title_full A Robotic grinding station based on an industrial manipulator and vision system
title_fullStr A Robotic grinding station based on an industrial manipulator and vision system
title_full_unstemmed A Robotic grinding station based on an industrial manipulator and vision system
title_short A Robotic grinding station based on an industrial manipulator and vision system
title_sort robotic grinding station based on an industrial manipulator and vision system
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7990196/
https://www.ncbi.nlm.nih.gov/pubmed/33760891
http://dx.doi.org/10.1371/journal.pone.0248993
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