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近年来的主要进展 1、基础理论方面在基础理论方面,对电场和温度场的情况进行了深入的研究。利用弹性理论和光弹性试验方法,对决定电场情况的两板之间接触直径同电极压力、电极直径、工件厚度和屈服极限等参数建立起定量关系。由于焊接时的电场决定各处的发热弧度,因而直接影响焊核直径及其位置。这就为直接计处?:规范参数提供了理论依据并初步求出点焊低碳钢规范的公式为: S=7.63×10~7(de+0.8t)~4/I~2 式中:S为通电时间(周);de为电极直
In recent years, the main progress 1, the basic theory in the basic theory, the electric field and temperature field situation conducted in-depth study. Using elastic theory and photoelasticity test, the relationship between the contact diameter of the two plates that determines the electric field and the parameters of electrode pressure, electrode diameter, workpiece thickness and yield limit were established. Due to the welding electric field determines the heating radian everywhere, and thus directly affect the core diameter and its location. This provides a theoretical basis for the direct calculation of: standard parameters and preliminary formula for the specification of low carbon steel spot welding: S = 7.63 × 10 ~ 7 (de + 0.8t) ~ 4 / I ~ 2 Where: S for the power time (weeks); de for the electrode straight