Surface Integrity of Holes Machined by Orbital Drilling of Composites with Single Layer Diamond Tools
| Autor: | Zhongde Shi, M.H. Attia, Vincent Thomson, I. Sultana |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0209 industrial biotechnology
Materials science Drill Delamination Diamond Drilling 02 engineering and technology engineering.material composites 020303 mechanical engineering & transports 020901 industrial engineering & automation 0203 mechanical engineering engineering Surface roughness General Earth and Planetary Sciences Brazing Composite material superabrasive tools General Environmental Science Diamond tool Surface integrity |
| Zdroj: | Procedia CIRP. 45:23-26 |
| ISSN: | 2212-8271 |
| DOI: | 10.1016/j.procir.2016.02.067 |
| Popis: | Orbital drilling of composites was investigated to observe hole surface integrity in terms of surface roughness, delamination, surface burning, and geometric accuracy. Experiments were conducted with a brazed single layer diamond tool of ball-end geometry to drill 220 holes. Cutting forces and temperatures were measured. Micro-observations were made of the hole surface. The results showed that the forces increased sharply during drilling of the first 44 holes followed by a gradual rise. Part temperatures varied between 98-184°C. Surface roughness Ra varied from 13-17μm. Almost 99% of the holes were drilled without exit delamination; however, 2.3% of the holes showed entrance delamination. |
| Databáze: | OpenAIRE |
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