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頁籤選單縮合
題名 | 刀具斜角對正交切削參數影響之研究=A Study of the Influence of Tool's Rake Angle on the Parameters of Orthogonal Cutting |
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作者 | 林倉民; | 書刊名 | 樹德學報 |
卷期 | 21 1998.03[民87.03] |
頁次 | 頁37-72 |
分類號 | 446.893 |
關鍵詞 | 剪切角; 切削比能量; 平均磨擦角; 正交切削; 塑性變形; 刀具斜角剪應力; Shear cutting angle; Chip thickness cutting ratio; Mean angle of friction; Orthogonal cutting; Plastic deformation; Tool's rake angle; Shear stress; |
語文 | 中文(Chinese) |
中文摘要 | 機械製造所用之加工方法,大部分屬於切削加工,切削力之方向與切削力所引 起之滑動方向間,應有某種關係存在之想法,過去已有許多學者從事研究,亦即研究刀具 斜角、切屑與刀具斜面間之磨擦角,以及剪切角三者所存在的關係。並提出許多理論,預 測刀具斜角α與平均磨擦角β,對於切削中剪切角φ大小所生之影響。其中較為世人所注 目的學說,則只有兩種,它們分別是﹕Ernst & Merchont 和 Lee & Shaffer所提出的。 至於此學說的關係式分別是﹕ Ernst & Merchont : 2φ+β-α=π/2 Lee & Shaffer : φ+β-α=π/4 本實驗旨在研究討論,當刀具斜角α直改變,對切削比能量μ,平均磨擦角β,剪切 角φ,剪切面上之剪應力τ,所造成的影響。利用實驗所得的結果與上述兩理論相比較。 |
英文摘要 | Cutting is the most important tool for manufacturing. Different theories has been proposed to discuss the influence of the force on the sliding direction in cuttina. Among them, both Ernst & Merchant's theory and Lee & Shaffer's theory are most widely quoted. According to Ernst & Merchant, the relationships between the tool's rake angleα mean angle of friction β, and the shear cutting angle φ are 2φ+β- α=π/2. According to Lee & Shaffer, their relationships should be φ+β-α=π /4. This study analyzes the influence of the changes in the tool's rake angle α on the chip thickness cutting ratio μ , mean angle of friction β, shear cutting angle φ, and shear stress τ . It furthur compares these results with the theories above mentioned. |
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