FEMを用いた小径ボールエンドミルのたわみによる加工面生成機構の解析(機械要素,潤滑,工作,生産管理など)

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Ball end mills are useful cutters for machining three dimensional shapes, such as a molds or dies. While, recently it possible to machine hardened steel at high cutting speeds using a machine of which the spindle speed is over tens of thousand of revolutions per minute and a coated solid carbide tool which is developed for hardened steel machining. In such high speed machining of hardened steel, small size ball end mills are frequently used. But, the relationship between the shape of the machined surface and the tool deformation by cutting force is not cleared. Then, the aim of this study is to make clear the surface generating mechanism of ball end mill based of deflection by FEM. The main results are as followings. (1) FEM model of a small size ball end mill is shown and the variation of the cutting area by the cutting edge of ball part is calculated using 3D-CAD. (2) The rotational angle of the cutting edge which generates each resultant cutting force during cutting tests is obtained by comparing the variation of the cutting area with that of the resultant cutting force. (3) The deflection of the ball end mill is calculated by FEM and the shape of the machined surface is predicted by summation of cutting edge positions which are obtained by the cutter deflection and the cutter rotation duming machining. (4) The predicted shape is almost coincident to the experimental shape, so the method of calculation for the machined shape by a small size ball end mill is verified.
一般社団法人日本機械学会の論文
2003-11-25

FEMを用いた小径ボールエンドミルのたわみによる加工面生成機構の解析(機械要素,潤滑,工作,生産管理など)

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