精密仕上切削における非幾何誤差の抑制に関する研究 (第1報)

被削材の局部弾性回復による寸法誤差

抄録

The objective of this study is to identify the dimensional machining error due to recovery of local elastic deformation of work material at the tool-work contact point and to clarify the parameters to influence upon the elastic deformation, experimentally and theoretically. By applying linear regression analysis to the relation between given depth of cut and actual depth of cut such a very small quantity as elastic deformation of work material at the tool-work contact point can be quantified. In machining aluminum, delrin, nylon 66 and polystyrene, the error due to local elastic deformation of work material is an order of micronmeter, which is serious for high-precision machining. The smaller the elastic constant of work material, the larger the error is, this being verified also theoretically. Also, the experiments have disclosed that the dimensional error due to local elastic deformation of work material increases in proportion to the radius of cutting edge roundness, this being verified theoretically, too.