Study on chip removal mechanism of PCD ball-end milling (1st report) cutting simulation by orthogonal cutting
| Autor: | Peerapong Kasuriya, Takeshi Watanabe, Takashi Goto, Masahiko Jin |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Production and Manufacturing Research: An Open Access Journal, Vol 8, Iss 1, Pp 486-495 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2169-3277 21693277 |
| DOI: | 10.1080/21693277.2020.1862721 |
| Popis: | A polycrystalline diamond (PCD) ball-end mill is effective for processing molds made of hard and brittle materials, such as cemented carbide and ceramics and having fine and complex shapes with a high aspect ratio. The PCD ball-end mill has a distinctive feature of its cutting edge, which it has a simple spherical shape without sharp cutting edge found on conventional cemented carbide and cubic boron nitride (cBN) ball-end mills. The rake angle varies depending on the depth of cut. In cutting using the PCD ball-end mills, flow type chips are observed and mirror finish surface without micro fracture can be realized by adopting the ductile-cutting mode. However, the mechanism of chip generation in this cutting with the PCD ball-end mills has not been fully clarified. In this study, to simulate the cutting mechanism of the PCD ball-end mill, an orthogonal cutting experiment was conducted using an ultrafine PCD cutting insert having nose radius similar to that of the PCD ball-end mill, for basically understanding the chip formation mechanism of the PCD ball-end mill. Consequently, we designed an experimental setup with a spring constant force for applying simulation of thrust force of the PCD ball-end mill. As a result, the chips could be generated at down to −75° of rake angles and the relationship between the negative rake angles and the chip generation mechanisms were clarified. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
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