| 摘要 |
<p>The sheet metal pre-crimping tool blade (1) has a profile (10) shaped so that the angle of attack of the sheet metal (3) edge remains constant during the whole pre-crimping phase. The profile of the blade is calculated from a formula based on the external crimping radius, the thickness of the metal sheet, the roll angle of the sheet, the sheet's angle of attack and the height of the crimped edge.</p> |
