| URN | etd-0726113-141208 | Statistics | This thesis had been viewed 733 times. Download 4 times. |
| Author | Zhong-Zhe Ho | ||
| Author's Email Address | No Public. | ||
| Department | Institute Of Mechanical Engineering | ||
| Year | 2012 | Semester | 2 |
| Degree | Master | Type of Document | Master's Thesis |
| Language | zh-TW.Big5 Chinese | Page Count | 59 |
| Title | Study on surface finishing of mold steel machined using magnetorheological fluid and magnetic force | ||
| Keyword | |||
| Abstract | In this study, mold steel SKD 11 is machined using magnetorheological (MR) fluid under an external magnetic field. The MR fluid comprises silicone oil with pure water as the based fluid for alumina, ferric ferrous oxide, carbonyl iron powder and silane coupling agent. The external magnetic field whose force is controlled by a permanent magnet changes the viscosity of the MR fluid. The grinding mechanism installed on a machine table is under computer numerical control and the surface quality of the workpiece is measured by a 3D surface roughness profilometer. The effects of various machining parameters on surface roughness are examined to determine the optimal machining conditions. Experimental results show that the optimal machining conditions are spindle rotational speed, 100 rpm; axial loading, 14 kg; magnetic flux, 199 mT; and processing time, 11 min, which yielded mirror surface quality with surface roughness of 0.03 £gm.Experimental results show that the optimal machining conditions are spindle rotational speed, 100 rpm; axial loading, 14 kg; magnetic flux, 199 mT; and processing time, 11 min, which yielded mirror surface quality with surface roughness of 0.03 £gm. |
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| Files | indicate in-campus access at 3 years and off-campus access at 5 years | ||
| Date of Defense | 2013-07-10 | Date of Submission | 2013-07-29 |