| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of forming an end plate, by which the bulged part of the end plate is formed with high accuracy in the positional accuracy from the bottom. <P>SOLUTION: The method sequentially performs: a first step where, after holding the end plate K by inserting it into a mold, the inside diameter of the opening part of which is formed larger than that of the base part, in a state where the mold and the end plate are rotated integrally, the diameter of an open end is expanded into a tapered shape of outward expansion by pushing the outer circumferential surface of a first pressurizing roller against the inner peripheral surface of the open end of the end plate and pressing this open end of the end plate K against the inner peripheral surface of the mold; and a second step where the end plate K is rotated in a state where the outer bottom surface Ka of the end plate K is pushed against the reference surface 27 and also making a die roller 36 having a projecting line part 36a and a diameter reducing part 36b abut on the inner peripheral surface of the diameter expanding part of the end plate K, and, next, the diameter of a diameter reducing part is reduced into a tapered shape by pushing the outer circumferential surface of a second pressurizing roller against the outer circumferential surface of the diameter expanding part of the end plate K, pressing that diameter expanding part of this end plate K against the outer circumferential surface of the die roller 36 and making the diameter expanding part match the diameter reducing part 36b of the die roller 36. <P>COPYRIGHT: (C)2012,JPO&INPIT |
