| 摘要 |
<p>PURPOSE:To make it possible to inspect internal defect readily and highly accurately by applying ratiation to bearing components in the total of three directions of at least two directions and one direction, which is not located on the plane formed of the two directions. CONSTITUTION:In the typical example of the directions, along which radiation is applied to bearing components 1 and 2, the radiation is applied in three directions having the position relations of 90-degree angle to each other. Namely, the radiation is applied in the directions X, Y and Z. When the thicknesses of the bearing components 1 and 2 are different, mainly the central part is made to be the object of evaluation in the image, which is obtained in the first application of radiation, and the peripheral part is omitted from the object of evaluation. The application of radiation at the second time and thereafter are performed in the direction having the angle, which is different by at least 45 degrees. The application of radiation at the third time and thereafter are performed in preferably the directions of X, Y and Z. Even in the images obtained by the second and third irradiations, mainly the central parts of the bearing components made to be the object of evaluation. At this time, however, the part, which is omitted from the object of the first evaluation, is made to be the object of evaluation. Therefore, the entire bearing component can be positively inspected.</p> |
