Aiming at the complex characteristics of the sequential logic control system design, such as X-D diagram and karnaugh map method, a design method based on stepper module was proposed, the procedure of which does not need to be checked and corrected. The design of different pneumatic circuits was carried out with the automatic drilling machine as the application object. First, a stepper module composed of a two-position three-way valve and a dual-pressure valve was constructed, and its structure principle was analyzed in detail. Next, three kinds of stroke programs were listed by analyzing the working process of automatic drilling machine, which were multi-cylinder single reciprocating, multi-cylinder multi reciprocating and multi-cylinder multi-section reciprocating stroke program, and the pneumatic circuit control system was designed by the stepper module method. Finally, the pneumatic circuit was simulated and analyzed using the software Fluid-SIM. The simulation results showed that each actuator can complete the corresponding actions according to the design requirements, which verified the correctness and reliability of the stepper module design method. This work would provide a fast and effective method for the design of the sequential logic control system.

针对时序逻辑控制系统设计的复杂特点，如XD图和卡诺图法，提出了一种基于步进模块的设计方法，无需检查和修正程序。以自动钻孔机为应用对象，进行了各种气动回路的设计。首先，搭建了一个由二位三通阀和双压阀组成的步进模块，并对其结构原理进行了详细分析。其次，通过分析自动钻床的工作过程，列出了三种行程程序，分别是多缸单往复、多缸多往复和多缸多段往复行程程序，以及气动回路控制系统采用步进模块法设计。最后，利用Fluid-SIM软件对气动回路进行了仿真分析。仿真结果表明，各执行器可以根据设计要求完成相应的动作，验证了步进模块设计方法的正确性和可靠性。这项工作将为时序逻辑控制系统的设计提供一种快速有效的方法。