材料期刊网

目的：提高柱塞杆的耐磨和防腐蚀性能，减少处理系统的人工参与。方法针对氧-乙炔火焰喷焊对9米柱塞杆进行表面处理的工艺要求，通过选择控制方法和控制器，研制一种自动控制系统。系统以PLC自动控制为核心，通过柱塞杆的移动和旋转、气缸的升降、氧-乙炔火焰喷涂装置以及限位开关等的协调动作实现自熔性合金粉末火焰的喷熔，并利用触摸屏实现表面处理过程的可视化监控和参数设置。最后，通过实际喷涂效果对该自动控制系统进行评价。结果应用表明，该系统运行稳定可靠，参数设置灵活，实现了柱塞杆表面处理过程的自动控制。制备的工件涂层表面均匀，质量高，性能好。结论该系统适用于9米以内不同长度柱塞杆和不同喷涂材料的喷焊，能大大提高生产效率，可在相关领域推广。

ABSTRACT:Objective To improve the wear resistance and corrosion resistance performance of piston rods, and reduce the man-ual participation in processing system. Methods According to the process requirements of the surface treatment on nine-meter plunger rods by adopting oxygen-acetylene flame spray welding, the automatic control system was developed through selecting the control method and controller. With PLC automatic control as the core, the self-fluxing alloy powder flame spray welding was fin-ished through the coordination among the movement and rotation of the plunger rod, the rise and fall of cylinders, the oxygen-acety-lene flame spraying device and limit switches, and the touch screen was applied to realize visual monitoring of the surface treatment process and parameter settings. Finally, the automatic control system was evaluated based on the actual spraying result. Results Practical application proved that the system was stable and reliable, the parameter setting was flexible, and the automatic control of
surface treatment process on plunger rods was realized. The workpiece prepared showed high uniformity in surface coating, and had high quality and good performance. Conclusion The system was applicable to different lengths of plunger rods shorter than 9 meters and spray welding process with different coating materials, greatly improving the production efficiency, and could be generalized to relevant fields.