US 12,465,990 B2Granted

Arc welding method, and method for inspecting welding strength of joint welded using arc welding method

AssigneeNissan Motor Co., Ltd.

InventorsLi Gao, Youichi Mori, Mitsuo Ichikawa, Shintaro Nonaka, Yuji Hamaguchi

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Abstract

An arc welding method melts and joins at least a part of a workpiece having a plurality of overlapping non-ferrous metal plates. The arc welding method includes forming a machined hole in a welded portion of the workpiece. The machined hole is a non-through-hole that penetrates a non-ferrous metal plate on an arc-radiation side, and reaches a non-ferrous metal plate on a side farthest from an arc welder to form a partial recess portion. The arc welding method further includes causing arc radiation from an opening side of the machined hole to melt and weld a back surface of the non-ferrous metal plate furthest from the workpiece without using a backing jig on an opposite side of the workpiece.

Claims5

Dependent claims

An arc welding method for melting and joining at least a part of a workpiece having a plurality of non-ferrous metal plates that overlap one another, the arc welding method comprising:

forming a machined hole in a first portion of the workpiece, the machined hole being a non-through-hole that penetrates each of the plurality of non-ferrous metal plates except a bottommost non-ferrous metal plate among the plurality of non-ferrous metal plates, the bottommost non-ferrous metal plate being disposed on a side farthest from an arc welder and the non-through-hole including a recess portion formed in a portion of the bottommost non-ferrous metal plate;
and
forming a weld by causing arc radiation from an opening side of the machined hole to melt a back surface of the bottommost non-ferrous metal plate without using a backing jig on an opposite side of the workpiece.

Dependencies are inferred from the claim text.