后中值電流波形脈沖MIG焊調(diào)制工藝研究
[Abstract]:The latter median current waveform has a good effect on carbon steel by controlling droplet transfer in the phase of median current. The characteristics of aluminum alloy sheet materials determine the difficulty of welding. The waveform of Gao Si function curve is smooth, the energy is concentrated, the median current after modulation can produce strong and weak pulse group with alternating heat and cold, and the average value of welding input current is lower, so it is a new welding method for aluminum alloy material. The welding test of aluminum alloy sheet with 2 mm thickness was carried out successfully. By analyzing the signals collected from the test, it is found that the welding current and voltage waveform is regular, the distribution is regular, the repeatability is good, the energy input is concentrated, and the arc length is stable, which proves that the welding test process is stable. The appearance of the weld is clear and neat, the surface is bright, the melting height and penetration depth are suitable, there is no penetration and collapse, the arc sound is soft, and the welding process spatter is few.
【作者單位】: 廣東交通職業(yè)技術(shù)學(xué)院電子與通信工程學(xué)院;華南理工大學(xué)機(jī)械與汽車工程學(xué)院;
【基金】:廣東省科技計(jì)劃項(xiàng)目(2013B090600098) 黃埔區(qū)科技計(jì)劃項(xiàng)目(201341) 佛山市科技計(jì)劃項(xiàng)目(2011AA100175)
【分類號(hào)】:TG444.74
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