Publicação
A Process-based Cost Model for Wire and Arc Additive Manufacturing
| Resumo: | In engineering one of the main criteria to evaluate new technology or product is its eco- nomic viability. This can only be done by identifying the costs related to the process or prod- uct. Within the Smart WAAM project, which aims to study the use of wire and arc additive manufacturing (WAAM) technology to create, repair and expand the life of large industrial components, it was necessary to develop a cost model to study the economic viability of this technology. This thesis's primary goal is to develop a cost model for the WAAM technology, consid- ering a product life cycle approach. For this purpose, it was necessary to develop a model to estimate the cost of the WAAM technology, as well as the main factors influencing the cost. A process-based cost model (PBCM) was developed since it allows to analyse the costs of the different life cycle phases of a product and estimates the production costs. The study main steps were the objective and scope definition, using a cradle to gate approach, the pro- cess description, and the cost model's development. The object of study was an experimental WAAM machine developed at NOVA School of Science and Technology, and the functional unit was a hollow stainless steel AISI316LSI cube of approximately 7x7x7 cm. The data collec- tion process included the compilation of secondary data available in public websites, but also primary data was collected through unstructured interviews with researchers who developed and worked with the WAAM machine. The model was validated, and the factors influencing the cost were identified. It was possible to determine that the production of 500 cubes has a total cost of 259.95€ per piece. The WAAM process and the surface finishing process and substrate removal rep- resent 84% of the total cost. The main factors that influence the total cost of the process are the acquisition cost of the machines for the production and parts finishing, the cost of the tools, namely the cutters, and the production overheads. |
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| Autores principais: | Cunha, Tomás Mealha Martins Rodrigues |
| Assunto: | Wire and Arc Additive Manufacturing Life Cycle Cos Process-Based Cost Model |
| Ano: | 2022 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| Resumo: | In engineering one of the main criteria to evaluate new technology or product is its eco- nomic viability. This can only be done by identifying the costs related to the process or prod- uct. Within the Smart WAAM project, which aims to study the use of wire and arc additive manufacturing (WAAM) technology to create, repair and expand the life of large industrial components, it was necessary to develop a cost model to study the economic viability of this technology. This thesis's primary goal is to develop a cost model for the WAAM technology, consid- ering a product life cycle approach. For this purpose, it was necessary to develop a model to estimate the cost of the WAAM technology, as well as the main factors influencing the cost. A process-based cost model (PBCM) was developed since it allows to analyse the costs of the different life cycle phases of a product and estimates the production costs. The study main steps were the objective and scope definition, using a cradle to gate approach, the pro- cess description, and the cost model's development. The object of study was an experimental WAAM machine developed at NOVA School of Science and Technology, and the functional unit was a hollow stainless steel AISI316LSI cube of approximately 7x7x7 cm. The data collec- tion process included the compilation of secondary data available in public websites, but also primary data was collected through unstructured interviews with researchers who developed and worked with the WAAM machine. The model was validated, and the factors influencing the cost were identified. It was possible to determine that the production of 500 cubes has a total cost of 259.95€ per piece. The WAAM process and the surface finishing process and substrate removal rep- resent 84% of the total cost. The main factors that influence the total cost of the process are the acquisition cost of the machines for the production and parts finishing, the cost of the tools, namely the cutters, and the production overheads. |
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