Rapid evaluation method for quality of resistance welding spot

The invention relates to a method for quickly evaluating the quality of a resistance welding spot, which comprises the following steps of: accumulating a welding dynamic resistance curve and obtaining an ideal dynamic resistance curve by carrying out a process welding test; fitting a plurality of ideal dynamic resistance curves into a standard dynamic resistance curve; actual welding is started, and a dynamic resistance curve in the welding process is controlled to be collected in real time; and calculating the distance between the actual curve and the standard curve by using a FastDTW algorithm to obtain a welding quality evaluation result. According to the method, the time complexity and the space complexity of the DTW algorithm can be greatly reduced, so that the method is more suitable for comparison of a relatively long time sequence of the resistance welding dynamic resistance curve. 本发明涉及一种电阻焊接焊点质量快速评价方法，通过进行工艺焊接试验，积累焊接动态电阻曲线并得到理想动态电阻曲线；将多条理想的动态电阻曲线拟合成标准动态电阻曲线；开始实际焊接，控制对焊接过程动态电阻曲线进行实时采集；使用FastDTW算法计算实际