Build-Up an Economical Tool for Machining Operations Cost Estimation
Currently, there is a lack of affordable and simple tools for the estimation of these costs, especially for machining operations. This is particularly true for manufacturing SMEs, in which the cost estimation of machined parts is usually performed based only on required material for part production,...
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Format: | Article |
Language: | English |
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MDPI AG
2022-07-01
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Series: | Metals |
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Online Access: | https://www.mdpi.com/2075-4701/12/7/1205 |
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author | Francisco J. G. Silva Vitor F. C. Sousa Arnaldo G. Pinto Luís P. Ferreira Teresa Pereira |
author_facet | Francisco J. G. Silva Vitor F. C. Sousa Arnaldo G. Pinto Luís P. Ferreira Teresa Pereira |
author_sort | Francisco J. G. Silva |
collection | DOAJ |
description | Currently, there is a lack of affordable and simple tools for the estimation of these costs, especially for machining operations. This is particularly true for manufacturing SMEs, in which the cost estimation of machined parts is usually performed based only on required material for part production, or involves a time-consuming, non-standardized technical analysis. Therefore, a cost estimation tool was developed, based on the calculated machining times and amount of required material, based on the final drawing of the requested workpiece. The tool was developed primarily for milling machines, considering milling, drilling, and boring/threading operations. Regarding the considered materials, these were primarily aluminum alloys. However, some polymer materials were also considered. The tool first estimates the required time for total part production and then calculates the total cost. The total production time is estimated based on the required machining operations, as well as drawing, programming, and machine setup time. A part complexity level was also introduced, based on the number of details and operations required for each workpiece, which will inflate the estimated times. The estimation tool was tested in a company setting, comparing the estimated operation time values with the real ones, for a wide variety of parts of differing complexity. An average error of 14% for machining operation times was registered, which is quite satisfactory, as this time is the most impactful in terms of machining cost. However, there are still some problems regarding the accuracy in estimating finishing operation times. |
first_indexed | 2024-03-09T13:22:08Z |
format | Article |
id | doaj.art-3490b43e7e9b4f7a972d0201ba1b8041 |
institution | Directory Open Access Journal |
issn | 2075-4701 |
language | English |
last_indexed | 2024-03-09T13:22:08Z |
publishDate | 2022-07-01 |
publisher | MDPI AG |
record_format | Article |
series | Metals |
spelling | doaj.art-3490b43e7e9b4f7a972d0201ba1b80412023-11-30T21:28:14ZengMDPI AGMetals2075-47012022-07-01127120510.3390/met12071205Build-Up an Economical Tool for Machining Operations Cost EstimationFrancisco J. G. Silva0Vitor F. C. Sousa1Arnaldo G. Pinto2Luís P. Ferreira3Teresa Pereira4Mechanical Engineering Department, ISEP-School of Engineering, Polytechnic of Porto, 4200-072 Porto, PortugalMechanical Engineering Department, ISEP-School of Engineering, Polytechnic of Porto, 4200-072 Porto, PortugalMechanical Engineering Department, ISEP-School of Engineering, Polytechnic of Porto, 4200-072 Porto, PortugalMechanical Engineering Department, ISEP-School of Engineering, Polytechnic of Porto, 4200-072 Porto, PortugalMechanical Engineering Department, ISEP-School of Engineering, Polytechnic of Porto, 4200-072 Porto, PortugalCurrently, there is a lack of affordable and simple tools for the estimation of these costs, especially for machining operations. This is particularly true for manufacturing SMEs, in which the cost estimation of machined parts is usually performed based only on required material for part production, or involves a time-consuming, non-standardized technical analysis. Therefore, a cost estimation tool was developed, based on the calculated machining times and amount of required material, based on the final drawing of the requested workpiece. The tool was developed primarily for milling machines, considering milling, drilling, and boring/threading operations. Regarding the considered materials, these were primarily aluminum alloys. However, some polymer materials were also considered. The tool first estimates the required time for total part production and then calculates the total cost. The total production time is estimated based on the required machining operations, as well as drawing, programming, and machine setup time. A part complexity level was also introduced, based on the number of details and operations required for each workpiece, which will inflate the estimated times. The estimation tool was tested in a company setting, comparing the estimated operation time values with the real ones, for a wide variety of parts of differing complexity. An average error of 14% for machining operation times was registered, which is quite satisfactory, as this time is the most impactful in terms of machining cost. However, there are still some problems regarding the accuracy in estimating finishing operation times.https://www.mdpi.com/2075-4701/12/7/1205cost estimationbudgetingmachiningoperation timesoperation costs |
spellingShingle | Francisco J. G. Silva Vitor F. C. Sousa Arnaldo G. Pinto Luís P. Ferreira Teresa Pereira Build-Up an Economical Tool for Machining Operations Cost Estimation Metals cost estimation budgeting machining operation times operation costs |
title | Build-Up an Economical Tool for Machining Operations Cost Estimation |
title_full | Build-Up an Economical Tool for Machining Operations Cost Estimation |
title_fullStr | Build-Up an Economical Tool for Machining Operations Cost Estimation |
title_full_unstemmed | Build-Up an Economical Tool for Machining Operations Cost Estimation |
title_short | Build-Up an Economical Tool for Machining Operations Cost Estimation |
title_sort | build up an economical tool for machining operations cost estimation |
topic | cost estimation budgeting machining operation times operation costs |
url | https://www.mdpi.com/2075-4701/12/7/1205 |
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