近年来,随着点焊技术的发展,应用到悍接高强度的重要结构领域正逐步扩大。于是就迫切希望点焊质量得到可靠保证,否则会因焊接区的破坏而直接造成重大事故。目前,由于没有实用的无损检验方法来检查焊接质量,所以在焊接过程中就必须设法提前防止焊接不良情况的发生。这些年来,国外 In recent years, with the development of spot welding technology, the important structural fields that are applied to the high strength are gradually expanding. Therefore, we urgently hope that the quality of spot welding can be reliably guaranteed, otherwise it will be a direct result of the destruction of the welding area of ​​a major accident. At present, there is no practical non-destructive testing method to check the quality of welding, so in the welding process must try to prevent welding defects in advance. In recent years, abroad