The Cutting Mechanism of Anisotropic Materials

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  • 異方性材料の切削機構に関する研究
  • イホウセイ ザイリョウ ノ セッサク キコウ ニ カンスル ケンキュウ アルミニウム アツエンバン ノ 2ジゲン セッサク
  • Orthogonal Cutting of Aluminium Plates
  • アルミニウム圧延板の二次元切削

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Abstract

Aluminium plates which have various inclination to rolling direction are cut orthogonally, and the cutting force and the shear angle are measured. Moreover, the anisotropic parameters and the γ-value are determined from tensile test of the same plates. Then, the effects of anisotropic nature on the chip formation are discussed from these results.<BR>The main results are as follows.<BR>(1) The cutting force R changes periodically against the plate inclined angle to rolling direction θ, and takes the minimum value near θ=0°, 90°, 180° and the maximum value at a middle of these. On the other hands, the shear angle φ changes in the reverse phase of R, and the ratio of its variation width to the mean value comes up to 50%.<BR>(2) The slope angle of R to cutting velocity (β-α) is almost invariable for θ. Accordingly, the main factor bringing a large periodical change of R consists in the variation of φ.<BR>(3) These phenomena can not be explained with the theory of plane strain, because of a different aspects of aluminium plate in relation between γ-value and 0 from, for example, steel or copper plate.<BR>(4) The φ (β-α) relationship is almost ploted on a straight line distinguished only by θ, and is out of the solution by Merchant or Lee-Shaffer.

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