随着我国建筑业的发展,越来越多地用空腹钢窗来代替木窗(见图1)。在我厂生产中曾经出现过一些焊接质量问題,如对角闪光电阻焊中常见的未焊牢、焊件对口处几何尺寸偏差、夹杂和疏松、裂缝 With the development of our country’s construction industry, more and more fast-acting steel windows instead of wood windows (see Figure 1). In our factory production there have been some welding quality problems, such as diagonal flash resistance welding common non-welded, welding parts of the geometric deviation of the mouth, inclusions and loose, cracks