(1) Blank heat treatment deformation, 55 and 12.4 size instability lead to the angle deviation after the clamping.<br>(2) CNI 1 blank size is stable, CNI 4 blank is unstable, fixture can not be identified.
(1) the angle deviation after clamping is caused by the deformation of blank heat treatment and the size instability of 55 and 12.4.<br>(2) the size of CNI 1 blank is stable, the CNI 4 blank is unstable, and the fixture cannot recognize it.<br>