钢板在对接时,由于种种原因将会造成一定的对接边缘偏差,但这种对接边缘偏差在锅炉、压力容器制造中却一直是属于必须严格控制的主要项目之一。因为如果对最边缘偏差过大,则简体在受力作用下,接头处便会产生不正常的受力状态,并且由于偏差部分要产生位移,将会使得焊缝处产生较大的二次应力。为此,无论在锅炉、压力容器的制造或验收中, When the steel plate is in butt joint, it will cause a certain deviation of the butted edge due to various reasons. However, such deviation of the butted edge has always been one of the major items that must be strictly controlled in the manufacture of boilers and pressure vessels. Because if the deviation to the extreme is too large, the simplified under the force, the joints will have abnormal stress state, and because of the deviation to be part of the displacement, will make a greater secondary stress at the weld . To this end, both in the boiler, pressure vessel manufacturing or inspection,