Fasteners are commonly called screws, are industrial necessities in daily life. At present, most products are fastened by operators. It tends to make mistakes or omission if there are too many screws to be fastened. The essay designs a dedicated fixture that tightening screw in sequence with STM8S903K3 as the main control chip. The essay puts forward general ideas of the hardware design of tightening screw fixture in sequence firstly. Then it illustrates on functional block diagram and peripheral circuit of tightening screw fixture in sequence. At last , it explains running status and extended function of this hardware circuit. This hardware design is completely feasible. Also , it helps to tighten screw fixture in sequence, prevent the problem of missing or making a mistake. To some extent, it has considerable promotional value.%螺丝是紧固件的通用说法,是日常生活中不可或缺的工业必需品,目前多数产品上的螺丝仍是操作工手动锁紧,如果需锁紧螺丝数量较多的话,容易漏打、错打.本文以STM8S903K3为主控芯片,设计了一款按照统一顺序锁紧螺丝的装置——序列打螺丝夹具,文章首先提出了设计方案,然后给出了序列打螺丝夹具的原理框图并针对芯片外围电路模块进行了重点设计说明,最后对运行状态指示、扩展及其他功能进行了说明.该设计具备可行性,实现了按统一顺序锁紧螺丝,解决了螺丝数量较多时螺丝的漏打、错打问题,具备很大的推广价值.
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