Performance of AlTiN- and diamond-coated carbide tools in dry high-speed milling of electro discharge machining graphite
| Autor: | Xinwei Yu, Yinchao Xu, Chang-jun Zhu, Shequan Wang, Songyi Chen, Kanghua Chen |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0209 industrial biotechnology
Materials science Mechanical Engineering Metallurgy Diamond 02 engineering and technology Chemical vapor deposition engineering.material 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Carbide 020901 industrial engineering & automation Electrical discharge machining Cutting force Physical vapor deposition Electrode engineering Graphite 0210 nano-technology |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture. 232:766-775 |
| ISSN: | 2041-2975 0954-4054 |
| DOI: | 10.1177/0954405416660999 |
| Popis: | Electrodes made of graphite material are widely used for electro discharge machining. The performance of physical vapor deposition AlTiN and chemical vapor deposition diamond-coated carbide end-milling tools in dry high-speed milling of electro discharge machining graphite was investigated, also adopting an uncoated one as a comparison. The quality of as-deposited diamond film was evaluated by Raman spectroscopy. The adhesion between the coating and the substrate was assessed by indentation test. The tool life and wear mechanism of the milling tools, the cutting forces during tests, as well as the roughness of processed surfaces were systematically studied. It is found that the diamond coating has lower adhesion than the AlTiN coating under the same load. Coating delamination and chipping, irregularly zigzag side flank wear, concave structure on the cutting edge are primary wear patterns for the diamond-coated tool. While different primary wear patterns, including uniform polishing abrasive flank wear and crater rake wear, are observed on the AlTiN-coated tool. Besides, the total cutting force of the diamond-coated tool is larger than that of the AlTiN-coated tool when the diamond-coated tool side flank wear value reaches 0.06 mm, attributed to the different wear patterns. Another notable result is clarified that the chipping of the diamond coating can cause significant increment in the feed force, radial force and worked surface roughness. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|