Sport equipment shaft and method for producing the same |
|||||||
| 申请号 | JP23183689 | 申请日 | 1989-09-08 | 公开(公告)号 | JPH02189170A | 公开(公告)日 | 1990-07-25 |
| 申请人 | Sandvik Special Metals Corp; | 发明人 | SUTEIIBUN II MEREDEISU; | ||||
| 摘要 | PURPOSE: To form a shaft with proper thickness by applying a rotary swathing process at the end of the shaft, sink drawing process to form steps on the outer surface of the shaft, and rotary swathing process at the outer surface with steps. CONSTITUTION: A rotary swathing process is applied to one end part 12 of this metallic shaft 10 to reduce the outer diameter of the part and to thicken the wall 22 of the part. A second shaft part 25 adjacent to the end part 12 is processed by sink drawing by way of a series of four drawing holes whose diameters are reduced to form a series of step group 26-30 so that the outer diameters become larger as parting from the shaft end part 12. After that, the second shaft part 25 with steps on the surface is given a rotary swathing process to be tapered smoothly without steps, whose diameters gradually reducing toward the shaft end part 12. As a result, the shaft part 25 is made to be the tip part reinforced by thickening the wall whose thickness is even all over the tapered shaft part. COPYRIGHT: (C)1990,JPO |
||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈