METHOD FOR INSPECTING WELD PENETRATION DEPTH

摘要

In a butt-welded joint structure in which the entire peripheral edge or both end sides of the abutting surface are welded, first and second cutouts for determining insufficient penetration and determining excessive penetration are formed. After butt welding, ultrasound is beamed onto each of the first and second cutouts of the joint structure and the reflected wave is measured. The acceptability of the weld penetration depth is thus determined on the basis of both of the reflected waves. This determination is performed on the entire peripheral edge portion or both end side portions of the butted face between the welded materials, and the acceptability of the weld penetration depth of the corresponding portions is inspected.

主权项

1. A method for inspecting a weld penetration depth, characterized in that
after performing butt welding of both end portions or an entire peripheral end portion of abutting surface between workpieces including a joint structure that includes, in each of the both end portions or the entire peripheral end portion of the abutting surface between the workpieces, a cutout that reflects ultrasonic waves in a case where a weld has not penetrated therein, the cutout including a first cutout that is used to determine insufficient weld penetration and a second cutout that is used to determine excessive weld penetration, performing, on the both end portions or the entire peripheral end portion of the abutting surface between the workpieces, a first step of emitting ultrasonic waves toward the first cutout or the second cutout of the joint structure and measuring reflected waves thereof, a second step of emitting the ultrasonic waves toward the second cutout or the first cutout of the joint structure and measuring reflected waves thereof, and a third step of determining whether the weld penetration depth is satisfactory or not based on the reflected waves measured in the first step and the second step, and thus inspecting whether the weld penetration depth in the both end portions or the entire peripheral end portion is satisfactory or not.