本文对机械闹钟夹板以铝合金薄板代替铜带之后的一次冲多个小孔的工艺及模具结构进行了分析、探讨。

This article analyzes and discusses the technology and model tool structure of aluminium-alloy thin-plate instead of brass band to punch several small hole one time.

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取下闹钟面板和机械装置。

Remove clock face and mechanism.

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闹钟：一种机械装置，没有孩子的人用它来把自己闹醒。

Alarm Clock: a mechanical device to wake up people who don't have children.

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