抄録
There are many points which depend on a worker's experience in the lathe work. This applies in the contents of the center hole. The destruction of the center hole becomes a big accident. This paper advocates the safetystandard concerning the center hole. It is analyzed about stress in the center hole by the experiment and the calculation.
This study is composed by some analysis methods. A photoelastic method, a method of caustics and a finite element method were used. The two-dimensional model of the center hole was made in the photoelasticity method. The model of the form which is the same as the photoelastic method was used in the two-dimensional finite element method. The model by which real machine parts were faithfully reproduced was analyzed in the three-dimensional finite element method. All results of an analysis were summarized by the three-dimensional finite element method. A final analysis was given by a three-dimensional finite element method about the center hole.
