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基于SORPAS软件,对1.5 mm厚的BR1500HS热成形钢双层板点焊温度场进行了数值模拟,研究了焊接时间、焊接电流和电极压力等焊接工艺参数对点焊温度场的影响规律。结果表明,在一定范围内,随着焊接时间增加,点焊峰值温度升高,熔核尺寸逐渐增大,热影响区宽度增加;随着焊接电流增加,点焊峰值温度升高,熔核尺寸逐渐增大,热影响区宽度先增加后减小;随着电极压力增加,点焊峰值温度降低,熔核尺寸略有减小;当焊接电流为8 k A时,热影响区宽度先缓慢增大后减小,在电极压力为4.5 k N时获得最大值,在焊接电流为9 k A时,热影响区宽度逐渐增加。
Based on the SORPAS software, the temperature field of BR1500HS thermoformed double-layer plate with a thickness of 1.5 mm was numerically simulated. The influence of welding parameters such as welding time, welding current and electrode pressure on the spot welding temperature field was studied. The results show that with the increase of welding time, the peak temperature of spot welding increases, the size of nugget increases and the width of heat affected zone increases. With the increase of welding current, the peak temperature of spot welding increases and the size of nugget The width of HAZ first increases and then decreases; with the increase of electrode pressure, the peak temperature of spot welding decreases and the size of nugget decreases slightly; when the welding current is 8 kA, the width of HAZ slowly increases After a large reduction, the maximum value is obtained at a 4.5 kN electrode pressure. With a welding current of 9 kA, the heat affected zone width gradually increases.