Manufacturing Technology: Unit I: Mechanics of Metal Cutting
lee and shaffer's theory
Mechanics of Metal Cutting - Manufacturing Technology
Lee and Shaffer's theory of orthogonal cutting is based on the slip line field theory i.e., it is the result of an attempt to apply the plasticity theory.
LEE AND SHAFFER'S THEORY Lee and Shaffer's theory of orthogonal cutting is based on the slip line field theory i.e., it is the result of an attempt to apply the plasticity theory. The following assumptions are made in this theory: (i) The work ahead of the tool behaves as ideal plastic mass (ii) There exists a shear plane which separates the chip and workpiece. (iii) No hardening occurs in chip. On the basis of the above assumptions, the following relationship is obtained The above equation could not apply for all values of γ and α. When γ is π/4 and α is 0, it will give the value of β as zero. Therefore, Lee and Shaffer modified the above equation by including the effect of built up edge by using additional angle & depending on the size of built up edge. Then, the above equation becomes However, the applicability of this solution for negative rake angle seems to be doubtful.
Manufacturing Technology: Unit I: Mechanics of Metal Cutting : Tag: : Mechanics of Metal Cutting - Manufacturing Technology - lee and shaffer's theory
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ME3493 4th semester Mechanical Dept | 2021 Regulation | 4th Semester Mechanical Dept 2021 Regulation