Proposal of a decision method of workpiece shapes during a rough machining operation based on topology optimization
Agile manufacturing that can rapidly machine advanced materials or creative shapes is expected as an important key to realize mass customization of industrial products. Most of high-value-added workpieces have three dimensional and complex shapes. Thus, the workpiece shape and stiffness vary greatly...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2017-09-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/83/856/83_17-00249/_pdf/-char/en |
| _version_ | 1798015198686085120 |
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| author | Shingo TAKAHASHI Kentaro ITANO Keiichi NAKAMOTO |
| author_facet | Shingo TAKAHASHI Kentaro ITANO Keiichi NAKAMOTO |
| author_sort | Shingo TAKAHASHI |
| collection | DOAJ |
| description | Agile manufacturing that can rapidly machine advanced materials or creative shapes is expected as an important key to realize mass customization of industrial products. Most of high-value-added workpieces have three dimensional and complex shapes. Thus, the workpiece shape and stiffness vary greatly according to cutting procedure during a rough machining operation. The induced displacement of workpiece strongly affects machining accuracy and tool life. However, it is difficult to automatically determine the process planning in commercial CAM system because of a large number of combinations. Therefore, the process planning has been designed by skillful experts to achieve complex parts machining. In order to realize future high efficient machining, it is necessary to obtain these tacit knowledges and to formulate the implicit machining know-how owned by skillful experts. As the first step, a method is proposed to decide workpiece shapes during a rough machining operation to ensure the workpiece stiffness based on topology optimization in this study. Topology optimization that is known as one of the highly flexible structure optimization methods enables to deal with the target configuration and shape. By introducing changeable fixed design domain and discretized characteristic function, an optimization problem can be converted to a problem of material distribution. In this study, the topology optimization is applied to decide workpiece shapes during a rough machining operation. As a purpose of minimizing their mean compliance, the optimized workpiece shape is calculated depending on applied loads at each machining step. By using the calculated workpiece shapes, a case study of complex parts machining is conducted. From the result, it is confirmed that a rough machining operation of complex parts can be achieved according to the decided workpiece shapes. |
| first_indexed | 2024-04-11T15:29:35Z |
| format | Article |
| id | doaj.art-d2d161ae730f4976a52c8df937f51cb9 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T15:29:35Z |
| publishDate | 2017-09-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-d2d161ae730f4976a52c8df937f51cb92022-12-22T04:16:10ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612017-09-018385617-0024917-0024910.1299/transjsme.17-00249transjsmeProposal of a decision method of workpiece shapes during a rough machining operation based on topology optimizationShingo TAKAHASHI0Kentaro ITANO1Keiichi NAKAMOTO2Department of Mechanical Systems Engineering, Graduate School of Engineering, Tokyo University of Agriculture and TechnologyDepartment of Mechanical Systems Engineering, Faculty of Engineering, Tokyo University of Agriculture and TechnologyDepartment of Mechanical Systems Engineering, Graduate School of Engineering, Tokyo University of Agriculture and TechnologyAgile manufacturing that can rapidly machine advanced materials or creative shapes is expected as an important key to realize mass customization of industrial products. Most of high-value-added workpieces have three dimensional and complex shapes. Thus, the workpiece shape and stiffness vary greatly according to cutting procedure during a rough machining operation. The induced displacement of workpiece strongly affects machining accuracy and tool life. However, it is difficult to automatically determine the process planning in commercial CAM system because of a large number of combinations. Therefore, the process planning has been designed by skillful experts to achieve complex parts machining. In order to realize future high efficient machining, it is necessary to obtain these tacit knowledges and to formulate the implicit machining know-how owned by skillful experts. As the first step, a method is proposed to decide workpiece shapes during a rough machining operation to ensure the workpiece stiffness based on topology optimization in this study. Topology optimization that is known as one of the highly flexible structure optimization methods enables to deal with the target configuration and shape. By introducing changeable fixed design domain and discretized characteristic function, an optimization problem can be converted to a problem of material distribution. In this study, the topology optimization is applied to decide workpiece shapes during a rough machining operation. As a purpose of minimizing their mean compliance, the optimized workpiece shape is calculated depending on applied loads at each machining step. By using the calculated workpiece shapes, a case study of complex parts machining is conducted. From the result, it is confirmed that a rough machining operation of complex parts can be achieved according to the decided workpiece shapes.https://www.jstage.jst.go.jp/article/transjsme/83/856/83_17-00249/_pdf/-char/enprocess planningtopology optimizationcamcuttingcomplx parts |
| spellingShingle | Shingo TAKAHASHI Kentaro ITANO Keiichi NAKAMOTO Proposal of a decision method of workpiece shapes during a rough machining operation based on topology optimization Nihon Kikai Gakkai ronbunshu process planning topology optimization cam cutting complx parts |
| title | Proposal of a decision method of workpiece shapes during a rough machining operation based on topology optimization |
| title_full | Proposal of a decision method of workpiece shapes during a rough machining operation based on topology optimization |
| title_fullStr | Proposal of a decision method of workpiece shapes during a rough machining operation based on topology optimization |
| title_full_unstemmed | Proposal of a decision method of workpiece shapes during a rough machining operation based on topology optimization |
| title_short | Proposal of a decision method of workpiece shapes during a rough machining operation based on topology optimization |
| title_sort | proposal of a decision method of workpiece shapes during a rough machining operation based on topology optimization |
| topic | process planning topology optimization cam cutting complx parts |
| url | https://www.jstage.jst.go.jp/article/transjsme/83/856/83_17-00249/_pdf/-char/en |
| work_keys_str_mv | AT shingotakahashi proposalofadecisionmethodofworkpieceshapesduringaroughmachiningoperationbasedontopologyoptimization AT kentaroitano proposalofadecisionmethodofworkpieceshapesduringaroughmachiningoperationbasedontopologyoptimization AT keiichinakamoto proposalofadecisionmethodofworkpieceshapesduringaroughmachiningoperationbasedontopologyoptimization |