| 摘要 |
<p>A method for cold shearing from a metal strip (12) a succession of at least two discoid preforms (11, 11', 11") made along at least two parallel rows, said at least two discoid preforms (11, 11', 11") having at least one inner tangent point (18, 18') between at least said rows and at least two outer tangent points (19, 19') with the lateral portions of said metal strip (12), characterised in that it achieves the step of cutting said metal strip (12) along at least two polygons (14, 14', 14") circumscribing said at least two discoid preforms (11, 11', 11"), wherein said at least two polygons (14, 14', 14") comprise at least one side (15, 15') comprising said at least one inner tangent point (18, 18") and at least two sides (16, 16') comprising said at least two outer tangent points (19, 19') and coinciding with said lateral portions of said metal strip (12).
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