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在银币的生产过程中,硬币表面发蓝是非常普遍的现象。许多硬币收藏者用放大镜,甚至是显微镜去观察硬币发蓝。如果不满意硬币的外观,收藏者将退还硬币给造币厂。为了清除银币表面的发蓝,造币生产线必须被中断,以抛光或清洗压印的模具。如果毛胚没有处于良好的准备状态,抛光一副冲模的时间就超过了压印硬币的时间。文中分析了硬币表面发蓝的原因,揭示了在模压过程中值得注意的摩擦学现象,并且提出了无需人工抛光冲模去除发蓝的方法,实现了银币的高效生产,清洗模具周期由冲压80次,提高到800次以上。
In the production of silver coins, blue coin surface is a very common phenomenon. Many coin collectors use a magnifying glass or even a microscope to observe the blue coin. If you are not satisfied with the appearance of the coin, the collector will refund the coin to the mint. In order to clear the blues on the surface of the silver coin, the coinage line must be interrupted in order to polish or clean the embossed mold. If the blank is not well-prepared, the time it takes to polish a die exceeds the time it takes to coin. In this paper, the reasons for the blues on the surface of the coin are analyzed. It is worth noting that tribological phenomena are noticed in the molding process, and the method of removing blues by manual polishing is proposed to realize the efficient production of silver coins. The cycle of cleaning the mold is controlled by 80 times , Raised to more than 800 times.