| 摘要 |
abrasive industry, namely, devices for cutting-out circular workpieces for grinding wheel. SUBSTANCE: die contains mandrel provided with elastic sow block and lower die shoe. Cover plate and inner circular punches with knockouts are mounted on the lower die shoe. The punches are provided with cutting edges, the chamfer of one of which is outward directed and the chamfer of the other one is inward directed. The cover plate encloses the outer circular punch. The circular punches project over the upper surface of the cover plate by the size of the cutting edges. EFFECT: facilitated manufacturing and reduced operation time. 3 cl, 2 dwg
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