The press bend device which has the deflection detection device of the upper bridge and the lower part bridge one crowning system operation at least mutually.

摘要

(57) Abstract Topic The press bend device which has the deflection detection device of the upper bridge and the lower part bridge one crowning system operation at least mutually is offered. Solutions It constitutes essentially the bridge of the upper part the bridge (1) and the lower part due to the means which detect the elastic deformation of the vertical axial direction which relates to (4), records that between press bend processes. The actual value where aforementioned means, the press bend device (A) the bridge of the upper part (1) are higher than reference level in logical unit or are low is supplied, because of this, the crowning system intervenes at least. And, aforementioned means operation to the both bridges, part engages in the bridge of active die, furthermore and outside part becomes independent from the bridge of that active die, concatenates with the bridge and the 1st bridge of one body which are locked mutually. Aforementioned means that detect the displacement of the active die bridge for the bridge which is locked have the means (8) which you communicate.