高温切削における精度の研究

全体加熱した丸棒被削材を旋削したときの形状誤差

抄録

The shape in which the whole-heated cylindrical work with same diameter is machined with lathe is not always cylinder with same diameter depending on the temperature distribution of the work by natural cooling. Then, in this paper, the theoretical equation for the shape error of the work which is machined after whole-heating is reduced and the comparison of numerical and experimental results are discussed.
These results lead to following conclusions.
(1) The diameter of the work which is whole-heated and machined is maximum at the end of machining and also minimum diameter is observed. The shorter the time of natural cooling, the position of minimum diameter approaches to the side of starting and longer the time, the position of minimum diameter comes to the middle.
(2) The difference of maximum and minimum diameters is large when the time of natural cooling is short and it shows maximum when the time is zero.
(3) Experimental results at 400°C of work temperature and numerical results coincide comparatively.