【摘要】 研究设计了基于单片机控制的双脉冲混合调制变极性TIG焊接电源。该焊接电源以MSP430单片机为控制核心,将脉冲电流调制功能和变极性功能相结合,在变极性电流波形的基础上同时进行高低频混合脉冲调制。高低频混合调制变极性电流波形在保证铝合金清理效果、降低钨极烧损、提高电弧稳定性的前提下,可以减少气孔、控制焊缝成形、提高焊缝的拉伸强度和延伸率。试验表明,采用该电流波形焊接6mm厚的LD10铝合金,焊缝成形良好、力学性能高、气孔很少,从而获得了良好的焊接效果。更多还原

【Abstract】 A microchip controlled double pulsed variable polarity TIG welding power supply is designed.Compared with the function of modulation and variable polarity,the welding power supply with microchip MSP430 controlled core can modulate the high and low frequency together at the same time on the basis of variable polarity.This welding power supply can decrease pore,control welding seam,and increase welding drawing intension and extensibility on the basis of ensuring excellent clearing effect,weakening buring tungsten and obtaining stable welding arc.The experiments show that by adopting such a form of that current to weld the 6 mm LD10 aluminum alloy,the seam is in good shape,the mechanics performance is good,and the pores are less,which acquired a good welding result.更多还原