CO2焊机一元化智能控制系统

One-knob Intelligent Control System of CO2 Welding Machine

关键词:  CO₂焊  一元化  智能控制

Key words:  CO₂ welding  one knob  intelligent control

摘要:

研制了CO₂焊接电弧电压的一元化自寻优微机智能控制系统,此系统能根据CO₂焊接电流的设定值对电弧电压进行自寻优调节,使焊接参数达到最佳配合。智能控制系统主要由弧压模糊控制模块、焊接电流控制模块与一元化推荐表组成。弧压模糊控制模块以CO₂焊接过程中的熔滴过渡频率f_d、燃弧时间与短路时间的比值t_as与短路周期标准差σ等特征参数的综合值作为判据进行弧压寻优。样机试验结果表明,此智能控制系统能显著改善CO₂焊机性能,降低焊接飞溅。

Abstract:

A microcomputer intelligent control system has been developed for self-optimizing of the arc voltage in CO₂ welding process.The system can automatically adjust the arc voltage in accordance with the set welding current value.The major models in the system are the arc voltage fuzzy control model,the welding current control model and the one knob recommending table.The arc voltage fuzzy control model takes the synthetic evaluation value of characteristic parameters in the welding process (the short circuiting transfer frequency f_d,the ratio of arc duration to short-circuiting duration t_as,and the short-circuiting period standard deviationσ) as a basis to optimize the arc voltage value.The testing results show that the developed self-optimizing control system obviously improve the performance of CO₂ welding machine and reduce welding spatter.