PURPOSE: To push out the above-mentioned projection having precision and strength, by putting the restriction die preventing flowing the material outward and female die on one face of metal plate and forming the concave part having a diameter suitable for the height of the projection part on the other face.

CONSTITUTION: The material 14 is placed on the plate weight 12 and the ring- shaped projection 10 is thrust in the material 14 descending the female die 8. Hereby, flowing of the material 14 outside is prevented. Meanwhile, pressure being the weight 12 in stopping state, is applied on the cushion pin 13. Moreover, pushing out of the material 14 is started by the punch 11 when the die 8 is descended. At this time, the material 14 is pushed in the hole 9 being only escaping place because the material 14 is made not to flow outside. On this occasion, processing is carried out under a high pressure because high pressure is generated at the processing proceeding part especially and breakage occurrence is prevented.