Dynamics modeling and stability analysis of five-axis ball-end milling system with variable pitch tools
| Autor: | Danian Zhan, Jinbo Niu, Shanglei Jiang, Yuwen Sun |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Computer science
Mechanical Engineering End milling Mechanical engineering 02 engineering and technology Surface finish Multiple modes 021001 nanoscience & nanotechnology Condensed Matter Physics Vibration 020303 mechanical engineering & transports 0203 mechanical engineering Machining Mechanics of Materials Ball (bearing) General Materials Science Pitch angle Tool wear 0210 nano-technology Civil and Structural Engineering |
| Zdroj: | International Journal of Mechanical Sciences. 182:105774 |
| ISSN: | 0020-7403 |
| DOI: | 10.1016/j.ijmecsci.2020.105774 |
| Popis: | Chatter has become a major obstacle in realizing high efficiency milling under the premise of ensuring structure integrity, as it creates violent vibration to the milling system and in turn results in poor surface finish and accelerated tool wear. Although some promising methods have been applied to the avoidance and suppression of chatter, and among them variable pitch tools play a critically important role, few studies focus on the stability prediction of five-axis ball-end milling with variable pitch tools. In this paper, a comprehensive dynamic model characterized by multiple delays is first built for five-axis ball-end milling system with variable pitch tools, and the milling stability lobe diagrams (SLDs) are predicted with an extended second-order semi-discretization method (2nd SDM) by taking the multiple modes of cutter into account. Then, the effects of tool orientation on the stability prediction of five-axis ball-end milling with variable pitch tools and regular tools are analyzed. The optimal cutter pitch angle can be obtained by comparing the SLDs for the stability improvement. Finally, the effectiveness of the proposed method is verified by experiments with a variable pitch ball-end cutter in five-axis machining center. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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