High-tonnage Coining Press Selection
高吨位压印设备选用
标签：精压机, 吨位, 刚度, 导向
压印需高刚性、慢速、导向精密的精压机（knuckle-joint 肘杆压印机最佳，下死点刚度高）。吨位按 F = A×p 计算，Φ40 mm 银币取 p≈800 MPa 需约 1000 kN；大奖章需 2000–5000 kN。机架刚度不足会导致图文边缘飞边增厚、尺寸漂移。
Coining needs a rigid, slow, precisely guided coining press—a knuckle-joint press is ideal for its dead-center stiffness. Force F = A×p; a Φ40 mm silver coin at p≈800 MPa needs ~1000 kN, larger medals 2000–5000 kN. A flexible frame thickens flash at relief edges and lets dimensions drift. ---