Dynamic analysis of ultrasonic vibration assistant machining system
Vibration assisted machining has been proven many times for its capability to improve fabrication processes. In the conventional use of vibration assisted machining, vibratory motion is more often applied to the cutting tool in processes such as turning where the cutting speed is much lower than the...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2010
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/40212 |
| _version_ | 1826110955150376960 |
|---|---|
| author | Chua, Danny Han Kwang. |
| author2 | Lin Rongming |
| author_facet | Lin Rongming Chua, Danny Han Kwang. |
| author_sort | Chua, Danny Han Kwang. |
| collection | NTU |
| description | Vibration assisted machining has been proven many times for its capability to improve fabrication processes. In the conventional use of vibration assisted machining, vibratory motion is more often applied to the cutting tool in processes such as turning where the cutting speed is much lower than the vibration speed in order to obtain intermittent cutting. In contrast, this study investigates vibration assistance that is applied to the workpiece in a milling system where the cutting speed is much higher than the vibration speed. The vibratory cutting edge motion in such a milling system is expected to reduce the cusp error resulted from peripheral milling. To verify this, a one-directional ultrasonic vibration assisted milling system is designed and its machining dynamics is investigated in terms of its modal structure and machined surface quality. A modal analysis is first performed on the milling system to obtain its natural frequencies and other modal parameters. Machining tests are then performed with different machining conditions of spindle speed, feed rate and depth of cut to further understand the mechanism of ultrasonic vibration assistance for surface roughness generation. In general, an improvement in surface roughness is observed with an increase in feed per tooth in both feed directional and cross feed directional ultrasonic vibration assisted milling. Some explanations are offered to support these results at the end of this study. |
| first_indexed | 2024-10-01T02:42:40Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/40212 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:42:40Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/402122023-03-04T18:48:48Z Dynamic analysis of ultrasonic vibration assistant machining system Chua, Danny Han Kwang. Lin Rongming School of Mechanical and Aerospace Engineering A*STAR Singapore Institute of Manufacturing Technology DRNTU::Engineering Vibration assisted machining has been proven many times for its capability to improve fabrication processes. In the conventional use of vibration assisted machining, vibratory motion is more often applied to the cutting tool in processes such as turning where the cutting speed is much lower than the vibration speed in order to obtain intermittent cutting. In contrast, this study investigates vibration assistance that is applied to the workpiece in a milling system where the cutting speed is much higher than the vibration speed. The vibratory cutting edge motion in such a milling system is expected to reduce the cusp error resulted from peripheral milling. To verify this, a one-directional ultrasonic vibration assisted milling system is designed and its machining dynamics is investigated in terms of its modal structure and machined surface quality. A modal analysis is first performed on the milling system to obtain its natural frequencies and other modal parameters. Machining tests are then performed with different machining conditions of spindle speed, feed rate and depth of cut to further understand the mechanism of ultrasonic vibration assistance for surface roughness generation. In general, an improvement in surface roughness is observed with an increase in feed per tooth in both feed directional and cross feed directional ultrasonic vibration assisted milling. Some explanations are offered to support these results at the end of this study. Bachelor of Engineering (Aerospace Engineering) 2010-06-11T07:53:56Z 2010-06-11T07:53:56Z 2010 2010 Final Year Project (FYP) http://hdl.handle.net/10356/40212 en Nanyang Technological University 99 p. application/pdf |
| spellingShingle | DRNTU::Engineering Chua, Danny Han Kwang. Dynamic analysis of ultrasonic vibration assistant machining system |
| title | Dynamic analysis of ultrasonic vibration assistant machining system |
| title_full | Dynamic analysis of ultrasonic vibration assistant machining system |
| title_fullStr | Dynamic analysis of ultrasonic vibration assistant machining system |
| title_full_unstemmed | Dynamic analysis of ultrasonic vibration assistant machining system |
| title_short | Dynamic analysis of ultrasonic vibration assistant machining system |
| title_sort | dynamic analysis of ultrasonic vibration assistant machining system |
| topic | DRNTU::Engineering |
| url | http://hdl.handle.net/10356/40212 |
| work_keys_str_mv | AT chuadannyhankwang dynamicanalysisofultrasonicvibrationassistantmachiningsystem |