| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of two-piece and a four-piece forging which is highly efficient, requiring less time, and offering a high quality product and a high material yield in the manufacture of a single piece-flanged stepped shaft-like article by forging a metallic material. SOLUTION: The two-piece forging method comprises the steps of preparing a forging material (1) of an appropriate length, forging a center part (6) other than both end parts (5A, 5B) of a specified length to be formed into flanges to form a shaft part (7) and cutting and removing an excess part (8) in the center of the shaft part to simultaneously obtain products (9A, 9B). COPYRIGHT: (C)2004,JPO
|
