A PRESS FOR DEFORMING A PLANAR SHEET HAVING AN OPEN-RING CONFORMATION UP TO GIVING THE PLANAR SHEET A HELICAL SWEEP

摘要

It presses (1), it is used to make a charta tabella (2) deformation upwards with an open ring construction to (2) one helical sweep of charta tabella, it include: the first deformation element (4), it is born by the first arm (8), including one first wall (5), meet the part for limiting a spiral of the first helical axis (X); Second deformation element (6), is born, including one second wall (7) by the second arm (9), meets the part for limiting the spiral of second helical axis (Y). ;First arm (8) and the second arm (9) are rotationally coupled to about a relative rotation axi (Z) each other, so as to the first wall and the second wall face-to-face and, so that rotary shaft (Z) is in a predetermined position, so as to during the deformation of a part of charta tabella (2) (3), first helical axis (X) and the second helical axis (Y) limit the angle (α) greater than zero between them, so that in the direction of the external edge (3b) from internal edge (3a) to part (3) is left away, deformation force is reduced.