Patent ID: 9227668
Filing Date: 2016-01-05
CPC Classification: B21J,B23K,B32B,B60R,B62D

Claim Text:
1. A joint structure for dissimilar metal members, comprising a first member formed from a metal sheet, and a second member formed from a metal sheet having a thermal expansion coefficient greater than that of the metal sheet for the first member, wherein the first member and second member are formed, respectively, with two bulging portions bulging in mutually separating directions and extending in a first direction, the first member and second member being superimposed on each other and spot-joined together at a plurality of positions in the first direction, in each of two regions on both sides of the bulging portions in a second direction orthogonal to the first direction, the second member has a bead portion extending in the second direction, at a position between adjacent ones of the spot-joined points, and the bulging portion of the second member is formed with a groove extending in the second direction, at a position corresponding to the bead portion in the first direction.