Relationship Between DRC and Nugget Diameter of High Temperature Alloy in Spot Welding 高温合金点焊动态电阻曲线与熔核直径的关系
Correlation Between Spectrum Characteristics of Current Waveform and Nugget Diameter in AC Spot Welding of Stainless Steel Under the Condition of Shunt 分流条件下不锈钢交流点焊电流波形的频谱特征与熔核直径的关系
The dynamic resistance curve ( DRC) of high temperature alloy in spot welding under the shunt effect are measured and analyzed. The relationship between quasi steady resistance value rs of DRC and nugget diameter dn is discussed. 测定和分析了分流影响下的高温合金点焊动态电阻曲线,探讨了动态电阻曲线的准稳态电阻值rs与熔核直径dn之间的对应关系。
The variation regularity of nugget diameter is shown in the frequency spectrum charts of the current signal. 交流点焊电流信号频谱图包含的信息,能够很好反映熔核直径的变化规律。
Testing and verification results show that the nugget diameter can be determined more accurately according to the variation of the first peak value of ultrasonic waveform. 检测及验证结果表明,根据透过焊点的超声波形第一峰值的变化情况,可以较准确地确定点焊熔核的直径。
Compared to low-carbon zinc-coated steel sheet, nugget diameter increases discontinuously with the increase of welding current when welding micro-alloyed high strength steel sheet. 与普通低碳镀锌钢板不同,微合金镀锌钢板的熔核直径随焊接电流的增加存在突变现象。
Determining spot welded nugget diameter of low carbon steel by ultrasonic immersion method with focusing probe 低碳钢点焊熔核直径的超声水浸聚焦法检测
And apart from that, the electrode pressure which coated electrode need to reach the maximum nugget diameter is slightly larger than the uncoated ones, but the maximum nugget diameter of coated electrode is bigger than the uncoated. 涂层电极熔核直径达到最大值所需电极压力稍大于普通电极,但涂层电极熔核直径最大值比普通电极大。
The time that nugget diameter of coated electrode needed to meet the requirements is shorter than the uncoated ones, so using the coated electrode can improve production efficiency and save both time and energy. 涂层电极熔核直径达到要求时需要的时间比普通电极短,因此涂层电极可以节约时间,提高生产效率,节省能耗。