在管线弯头的预制、焊接过程中,必须先对其进行加固及定位焊,固定构件的位置,以防焊后变形。但常因操作者对这一环节不够重视,而使其劳而无功。如下图a)所示,操作者在现场将顺手拾来的边角碎料,做为加固定位板轻意地将其焊在弯头上。经焊接后,这样的定位法将 In the pipeline elbow prefabricated, the welding process, it must first be reinforced and positioned welding, the location of the fixed components to prevent post-welding deformation. But often due to the operator of this aspect is not enough attention, leaving it reluctantly. As shown in a) below, the operator will easily pick up the scrap at the site, as the reinforcement plate lightly welded to the elbow. After welding, this positioning method will be