| 摘要 |
PURPOSE:To enable the production of a deformed bellows of high accuracy by performing the formation of a bellows with pressing the forming jig having the outer peripheral shape of a non-cylindrical bellows to the outer peripheral side of the circular bellows being formed in advance. CONSTITUTION:A formation is performed with applying a press force P gradually on a jig 14 after setting the cylindrical bellows 13 being formed in advance into the forming jig 14 having the outer peripheral shape of the necessary non- cylindrical bellows. The deformation of the cylindrical bellows 13 is progressed with its shape being limited by the inner peripheral shape of the jig 14 with its gradual flattening and the formation of a deformed bellows is completed with the contact of the total face of the bellows 13 with the inner periphery of the jig 14 at the last stage. The deformed bellows having high accuracy can be thus produced without being affected almost by the constraint on the quality. |
