Publication
Automatic volume inspection for glass blow moulds
| datacite.subject.fos | Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática | pt_PT |
| dc.contributor.advisor | Neves, Carlos Fernando Couceiro de Sousa | |
| dc.contributor.advisor | Simões, Fábio Jorge Pereira | |
| dc.contributor.author | Ferreira, Tiago André Roriz | |
| dc.date.accessioned | 2021-03-03T14:15:17Z | |
| dc.date.available | 2021-03-03T14:15:17Z | |
| dc.date.issued | 2020-12-29 | |
| dc.description.abstract | In the glass bottle mould making industry, volume control is done by measuring the amount of water needed to fill the mould. This process has several issues. Firstly, it requires a trained operator to properly seal the mould. Secondly, different operators will lead to different volume values. Another issue is related to the time and work necessary for the procedure, which can take up to 20 minutes for a single mould, making it unsuitable to inspect several moulds of the same series. These issues can be solved by automating the procedure. By using reverse engineering systems to obtain the internal cavity surfaces, comparative studies can be done, such as wear study, enabling the optimization of the moulds. The goal of this project is to establish a system to automate the inspection of the moulds which will result in the acquisition of the moulding surfaces. Then, the volume of the moulds and surface deviations in specific areas can be measured. The development of this project focused in two main areas: the development of a script, where the volume is calculated and the surface is inspected, from cloud points, to determine if the mould is in an acceptable state; and the study of technologies capable of acquiring the mould’s surface while simultaneously being automatable. As for this study, several case studies using laser and structured light are performed to understand the abilities and limitations of these technologies. The first study was done using polished cast iron moulds to determine the ability to acquire the surface and obtain the volume. Then, the ability to present proper comparative results is explored by using a set of unpolished cast iron moulds and then these same moulds once polished to verify if the used systems can obtain the deviations between the two situations. Finally, the validation of the technologies was done using a demo bronze mould, where surface deviations were inspected as well as a ring gauge where the inner cylinder was used for inspection. From these cases, the used laser scanner was able to obtain the volumes of the moulds as well as proper comparative results without spray. As for the used structured light system, it proved unable to acquire the surfaces of the moulds and of the ring gauge, requiring spray. Despite this performance, the system is quite automatable and a state-of-the-art structured light system, using blue light, could be used for this purpose. The laser is also a viable solution, but the cost and complexity to automate can be higher than the structured light system. | pt_PT |
| dc.identifier.tid | 202657825 | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10400.8/5432 | |
| dc.language.iso | eng | pt_PT |
| dc.subject | Automatic inspection | pt_PT |
| dc.subject | Laser scanning | pt_PT |
| dc.subject | Reverse engineering | pt_PT |
| dc.subject | Bottle moulds | pt_PT |
| dc.title | Automatic volume inspection for glass blow moulds | pt_PT |
| dc.type | master thesis | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | masterThesis | pt_PT |
| thesis.degree.name | Mestrado em Engenharia de Concepção e Desenvolvimento de Produto | pt_PT |
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