摘要
针对铝合金焊接性差的缺点,以TMS320LF2407A芯片为控制核心,从硬件电路、控制思想、软件抗干扰、起弧波形等方面进行了铝合金双脉冲MIG焊控制系统设计。试验结果表明,该控制系统波形控制稳定一致性好,自行设计的大能量起弧波形控制程序起弧可靠、效果良好;同时熔池搅拌能有效减少气孔等缺陷的发生几率,可获得美观的鱼鳞纹焊缝;在一定范围内,焊缝外观与焊接速度直接相关,随着焊接速度的提高,焊缝的鱼鳞状波纹明显增大,成形宽度明显减小;增加焊接电源的能量密度是提高焊接接头性能的有效途径。
According to the poor weldability of aluminum alloy,a double-pulse metal inert-gas welding control system was developed with TMS320LF2407A chip as its core.Its hardware circuit,thought of control,anti-interference software and arc-strike waveform were introduced. Test results show that the waveform control is stable and consistent,and the high-energy arc striking is good and reliable.The molten pool stirring can effectively reduce the incidence of defects such as pores,which helps to form weld with beautiful scaly figures.Within a certain range, weld appearance is directly related to welding speed.With the improvement of the welding speed,the scaly figure becomes more obvious,and the weld width significantly reduces.It is effective to improve the performance of welded joints by increasing the energy density.
出处
《焊接》
北大核心
2009年第1期33-36,共4页
Welding & Joining
基金
国家自然科学基金项目(50875088)
广东省科技计划项目(2008B010400006)
关键词
双脉冲MIG焊
铝合金焊接
大能量起弧
小波分析
焊接速度
double-pulse metal inert-gas welding
welding of aluminum alloy
high-energy arc striking
wavelet analysis
welding velocity
