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针对某连退机组电阻搭接焊所存在的虚焊与过烧等焊接质量问题,分析确定影响焊接质量的主要因素,结合焊机的设备与工艺特点,建立了焊接过程熔核所需热量计算模型与焊接过程有效热量计算模型,实现了针对给定焊透率熔核所需热量和给定焊接工艺参数下所能获得的有效热量的定量预测计算。然后,提出以焊透率描述焊缝质量并以有效热量与熔核热量相等求解实现指定焊透率(即最优焊缝质量)的最佳焊接工艺参数,联立焊接过程熔核所需热量计算模型与焊接过程有效热量计算模型建立了一种焊接工艺参数设定方法和数学模型,形成一套连退机组搭接焊焊缝质量控制技术。将其应用到某钢厂连退机组生产线,提高了带钢的焊接质量,避免了虚焊与过烧等缺陷的发生,并为新钢种的开发减少了焊接试验时间与试验用料,创造了较大的效益。
Aiming at the welding quality problems such as virtual welding and over burning existing in the resistance lap welding of a continuous line unit, the main factors affecting the welding quality are analyzed and determined. Combined with the characteristics of equipment and process of the welding machine, the calorific value calculation for the welding process nugget Model and the effective calorific calculation model of the welding process, the quantitative predictive calculation of the calorific value required for a given flux nugget and the available calorific value under a given welding process parameter is achieved. Then, the optimal welding process parameters that describe the weld quality by the penetration rate and equal the effective heat and the nugget heat to achieve the specified welding penetration (ie, the optimal weld quality) are proposed. The heat required for the simultaneous welding process nugget Calculation model and effective heat calculation model of welding process A welding process parameter setting method and mathematical model was established to form a set of continuous welding line quality control technology. Its application to a steel plant even with the unit production line to improve the quality of the strip welding to avoid the Weld and over-burning and other defects, and the development of new steel to reduce the welding test time and test materials, create A greater benefit.