| 摘要 |
The method employs a spherical measuring body (23) inserted into the angle ( alpha ) between the two limbs (22.1, 22.2) of a sheet which is gripped between the tip (24) of an upper tool (20) and the mouth of a recess in a lower tool (21). The distance between the sphere and the tip is measured as an unambiguous basis for calculation of the angle. The measurement may be made during a bending operation, which is repeated until the measured angle is equal to the desired value. |
