MIG焊铝正弦波调制脉冲控制参数应用

基于铝合金类轻质材料焊接之低能量输入等难点的要求,建立了正弦波调制脉冲MIG焊铝控制参数关系式,试验验证了所建立的正弦波调制脉冲控制参数关系式的正确性和实用性,由于正弦波形具有无限阶导数连续性、永恒周期性、控制参数少等特征,其调制脉冲波形可实现焊接能量有效精确调节,且易于稳定形成高质量的鱼鳞纹焊缝.试验提出的关系式中m的数值范围在2～3时,正弦波调制脉冲焊接具有参数匹配范围宽,受工作外部环境干扰因素的影响小等优点,为正弦波调制脉冲MIG焊接过程的参数一元化开发等奠定了理论基础.

Application of control parameter in sinusoid modulation pulsed MIG welding of aluminum alloy

Based on the difficulties in welding of light material like aluminum alloy,which required low energy input and other requirements,the control parameter relationship formula was established for sinusoid modulation pulsed MIG welding of aluminum,and experiments were used to validate its correctness and practicability.Due to the characteristics of sinusoidal waveform such as infinite derivative continuity,eternal periodicity and less controlled variable,the modulation pulse waveform can realize to effectively and precisely regulate welding energy,and the stable and high quality fish scale weld seam can be obtained.While experiments indicated that the change range of m value in the relationship formula is from 2 to 3.There are advantages in sinusoid modulation pulse MIG welding such as wider parameters matching range,less interference from external working environmental factors,which lays the theoretical foundation for the parameter unification exploitation in the sinusoid modulation pulsed MIG welding process.