Welding of steel and aluminum a first on frames of mass-produced vehicles

Welding of steel and aluminum a first on frames of mass-produced vehicles
Front subframe.

Honda Motor today announced that it has newly developed a technology for the continuous welding of the dissimilar metals of steel and aluminum and applied it for the first time in the world to the subframe of a mass-production vehicle, a key component of a vehicle body frame. Honda will adopt this technology first to the North American version of the all-new 2013 Accord, which will go on sale in the United States on September 19, 2012, and will expand application sequentially to other models.

Striving to reduce vehicle weight in order to increase , Honda focused on Friction Stir Welding (FSW) and developed a new technology for the continuous welding of steel and aluminum. This technology generates a new and stable metallic bonding between steel and aluminum by moving a rotating tool on the top of the aluminum which is lapped over the steel with high pressure. As a result, the welding strength becomes equal to or beyond conventional Metal Inert Gas (MIG) welding.

Welding of steel and aluminum a first on frames of mass-produced vehicles
Conceptual diagram of FSW of dissimilar metals.

This new technology contributes to an improvement in fuel economy by reducing body weight by 25% compared to a conventional steel subframe. In addition, during the is reduced by approximately 50%. It also enabled a change in the structure of the subframe and the mounting point of suspension, which increased the rigidity of the mounting point by 20% and also contributed to the vehicle's dynamic performance. 

Furthermore, Honda established a new method to apply this technology to mass-production vehicles. Conventionally, FSW required use of large equipment, but Honda developed a FSW continuous welding system applied to a highly versatile industrial robot. This system also can be used for aluminum-to-aluminum welding and thus, the welding system with the same specifications can be used for production of a full-aluminum subframe.

Honda also developed a non-destructive inspection system using a highly-sensitive and laser beam, which enables an in-line inspection of the bonding location for every unit.


Explore further

Hybrid welding process developed

Source: Honda
Citation: Welding of steel and aluminum a first on frames of mass-produced vehicles (2012, September 6) retrieved 26 September 2020 from https://phys.org/news/2012-09-welding-steel-aluminum-mass-produced-vehicles.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
0 shares

Feedback to editors

User comments