Mazda Motor Corporation

Mitsuaki Kitamura

Takayuki Kimura

Toshiyuki Gendou

Mitsugi Fukahori

Masanobu Kobashi

Satoshi Obata

Tetsukan Takasue

Disclosed is an automotive rear vehicle body structure which comprises a rear subframe () provided with right and left side member segments (). Each of the right and left side member segments () has a rear region provided with a rear fixing section () attached to a respective one of right and left rear side frames (), and a front region provided with a front fixing section () attached to a vehicle-body cross member (). A position of the front fixing section () of each of the side member segments () is set to be located inward of the respective one of the rear side frames () in a vehicle width direction, and each of the side member segments () is provided with an arm support section () configured to pivotally support a suspension arm (), at a position rearward of the front fixing section ().

Automotive rear vehicle body structure

In a first step, a roof panel and a front header are joined at plural frictional spot joint portions at a front-end frictional joint area, and the roof panel and a rear header are joined at plural frictional spot joint portions at a rear-end frictional joint area. The roof panel and a side roof rail are joined at plural frictional spot joint portions at left-side and right-side frictional joint areas. Subsequently, in a second step, the members are joined at the plural rivet joint portions at a border area of the above-described joint areas, and the members are joined at plural rivet joints at a bounder area of the above-described joint areas. Accordingly, there can be provided a joining method and structure of metal members that can properly reduce deformation due to a thermal strain.

Joining method and structure of metal members

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Hiroshima, Japan

Mitsuaki Kitamura