Progressive microforming process : towards the mass production of micro-parts using sheet metal
Although there is considerable published literature on micro-metal forming processes, there is still a lack of research towards implementing these processes commercially. Some of the challenges are handling of micro-parts and process intermittency. This work demonstrates the feasibility of producing...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
|
| Online Access: | https://hdl.handle.net/10356/100219 http://hdl.handle.net/10220/13585 |
| _version_ | 1811680822128803840 |
|---|---|
| author | Jarfors, Anders E. W. Ghassemali, Ehsan Tan, Ming-Jen Lim, Samuel Chao Voon |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Jarfors, Anders E. W. Ghassemali, Ehsan Tan, Ming-Jen Lim, Samuel Chao Voon |
| author_sort | Jarfors, Anders E. W. |
| collection | NTU |
| description | Although there is considerable published literature on micro-metal forming processes, there is still a lack of research towards implementing these processes commercially. Some of the challenges are handling of micro-parts and process intermittency. This work demonstrates the feasibility of producing symmetric micro-parts using a progressive forming set-up. Such a progressive forming process alleviates the challenges in handling and removal of micro-parts. Micro-pins with diameters of 0.3, 0.5, and 0.8 mm were successfully manufactured without defects. Experimental observations together with process simulation results showed that this process has three main stages: (1) indentation at the very beginning, (2) upsetting, and (3) extrusion predominantly occurring at the very end stage of the stroke. The bulk of the pin forming occurs at the end stroke of the process (extrusion stage). The effects of punch/pin diameter ratio on the pin aspect ratio and the maximum forming load were also investigated. In addition, the finite element results also revealed that a hybrid friction model was required to be implemented for better fit with experimental results as compared to the shear and Coulomb friction models. |
| first_indexed | 2024-10-01T03:31:09Z |
| format | Journal Article |
| id | ntu-10356/100219 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:31:09Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/1002192020-03-07T13:22:15Z Progressive microforming process : towards the mass production of micro-parts using sheet metal Jarfors, Anders E. W. Ghassemali, Ehsan Tan, Ming-Jen Lim, Samuel Chao Voon School of Mechanical and Aerospace Engineering A*STAR SIMTech Although there is considerable published literature on micro-metal forming processes, there is still a lack of research towards implementing these processes commercially. Some of the challenges are handling of micro-parts and process intermittency. This work demonstrates the feasibility of producing symmetric micro-parts using a progressive forming set-up. Such a progressive forming process alleviates the challenges in handling and removal of micro-parts. Micro-pins with diameters of 0.3, 0.5, and 0.8 mm were successfully manufactured without defects. Experimental observations together with process simulation results showed that this process has three main stages: (1) indentation at the very beginning, (2) upsetting, and (3) extrusion predominantly occurring at the very end stage of the stroke. The bulk of the pin forming occurs at the end stroke of the process (extrusion stage). The effects of punch/pin diameter ratio on the pin aspect ratio and the maximum forming load were also investigated. In addition, the finite element results also revealed that a hybrid friction model was required to be implemented for better fit with experimental results as compared to the shear and Coulomb friction models. 2013-09-23T06:33:57Z 2019-12-06T20:18:46Z 2013-09-23T06:33:57Z 2019-12-06T20:18:46Z 2012 2012 Journal Article Ghassemali, E., Tan, M.-J., Jarfors, A. E. W., & Lim, S. C. V. (2012). Progressive microforming process: towards the mass production of micro-parts using sheet metal. The International Journal of Advanced Manufacturing Technology, 66(5-8), 611-621. https://hdl.handle.net/10356/100219 http://hdl.handle.net/10220/13585 10.1007/s00170-012-4352-4 en The international journal of advanced manufacturing technology |
| spellingShingle | Jarfors, Anders E. W. Ghassemali, Ehsan Tan, Ming-Jen Lim, Samuel Chao Voon Progressive microforming process : towards the mass production of micro-parts using sheet metal |
| title | Progressive microforming process : towards the mass production of micro-parts using sheet metal |
| title_full | Progressive microforming process : towards the mass production of micro-parts using sheet metal |
| title_fullStr | Progressive microforming process : towards the mass production of micro-parts using sheet metal |
| title_full_unstemmed | Progressive microforming process : towards the mass production of micro-parts using sheet metal |
| title_short | Progressive microforming process : towards the mass production of micro-parts using sheet metal |
| title_sort | progressive microforming process towards the mass production of micro parts using sheet metal |
| url | https://hdl.handle.net/10356/100219 http://hdl.handle.net/10220/13585 |
| work_keys_str_mv | AT jarforsandersew progressivemicroformingprocesstowardsthemassproductionofmicropartsusingsheetmetal AT ghassemaliehsan progressivemicroformingprocesstowardsthemassproductionofmicropartsusingsheetmetal AT tanmingjen progressivemicroformingprocesstowardsthemassproductionofmicropartsusingsheetmetal AT limsamuelchaovoon progressivemicroformingprocesstowardsthemassproductionofmicropartsusingsheetmetal |