作　　者： ; ; ; ;

机构地区： 华南理工大学机械与汽车工程学院

出　　处： 《焊接学报》 2011年第5期37-40,114-115,共4页

摘　　要： 研制基于DSP的数字化双脉冲MIG焊电源，建立并论证了双脉冲MIG焊波形的定频模型和变频模型．结果表明，从50～300A电流范围内实现了精确到1A的双脉冲焊铝．专家数据库设计以调节强弱脉冲群中脉冲个数为主、脉冲基值为辅，一方面实现了焊接电流的连续性可调，另一方面达到了焊接过程中小电流细调、大电流粗调的“人性化”效果．在变频条件下保证其具有同等、连续的可调电流范围，通过调频可以得到理想疏密程度的鱼鳞纹焊缝．焊接电流波形规整稳定，无断弧现象发生，基本无飞溅，焊缝呈美观、清晰的鱼鳞纹． Double-pulsed gas metal arc welding machine was developed based on both static-frequency and dynamic-frequency models.The feasibility of the models was proved and an expert database was developed based on welding experiments.The results indicate that: the accuracy can be guaranteed to 1 A for the current range 50-300 A of double-pulsed welding of Al continuous adjustments can be achieved by adjusting dominant role of the number of pulses and the subsidiary role of the base-current value.Moreover,by using this method,the current can be adjusted slowly for low welding current,and rapidly for high welding current.The adjusting range of welding current can be kept constant and continuous for the dynamic-frequency mode.The fish scale pattern weld with proper density scaly can be obtained by adjusting the modulation frequency.The welding currents are kept stable and there is interruption arc and little spatter,the welding seams are beautiful.

关 键 词： 双脉冲参数建模 专家数据库 低频变频

领　　域： [金属学及工艺]