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影响焊接质量的因素有:焊条直径、焊接电流、焊接速度和电弧长度等。 1.焊条直径主要根据被焊工件的厚度来选择,农机具修造中常用的焊条直径为3～6毫米。平焊时应尽可能选择较粗的焊条,以提高焊接生产率,但对于多层焊,第一层应使用直径较小的焊条,以保证根部焊透。 2.焊接电流主要根据焊条直径选择,在平焊位置焊接低碳钢和低合金钢并采用3～6毫米的焊条时,可用下列经验公式估计焊接电流:
Factors affecting the quality of welding are: electrode diameter, welding current, welding speed and arc length. 1. The diameter of the welding rod is mainly based on the thickness of the workpiece to be selected, the construction of agricultural machinery commonly used electrodes diameter of 3 to 6 mm. Flat welding should be as thick as possible to choose the electrode, in order to improve the welding productivity, but for multi-layer welding, the first layer should use a smaller diameter electrode to ensure root penetration. 2. The welding current is mainly selected according to the diameter of welding rod. When welding low-carbon steel and low-alloy steel in the welding position and using 3-6mm welding rod, the following empirical formula can be used to estimate the welding current: