Last updated on April 24, 2014 at 16:01 EDT

Honda Develops New Technology to Join Steel and Aluminum and Achieves World’s First Application

February 22, 2013

LONDON, February 22, 2013 /PRNewswire/ –

Honda Motor Co., Ltd. has announced the development of a new technology to join steel
and aluminium and further applied this technology to mass production vehicles, initially
to the North American version of the all-new Acura RLX but plans to expand its application
to othermodels [http://www.honda.co.uk/cars/viewrange ].

The first application of this technology was with a new aluminium outer door panel,
which has conventionally been made of steel, to join it to the steel inner door panel.

To join together the dissimilar metals of steel and aluminium, the simultaneous
establishment of several different technologies was required including technologies to
prevent corrosion (electrical corrosion) and thermal deformation caused by the different
expansion rates of steel and aluminium.

Honda newly developed three technologies that enabled adoption of aluminium for the
outer door panel:

1) Technology to join dissimilar materials: adoption of ’3D Lock Seam’ (3DLS)
structure, where the steel panel and aluminium panel are layered and hemmed together twice

2) Technology to prevent electrical corrosion: adoption of highly anticorrosive steel
for the inner panel and a new form that assures the complete filling of the gap with
adhesive agent

3) Technology to control thermal deformation: adoption of an adhesive agent with low
elastic modulus (better ability to ‘stretch’) and optimised position of the 3D Lock Seam

The advantages of these new technologies include elimination of a spot welding process
required to join conventional steel door panels. Moreover, these technologies do not
require a dedicated process; as a result, existing production lines can accommodate these
new technologies.

In everyday use, the new technology contributes to the improvement of fuel economy and
dynamic performance of the vehicle by reducing door panel weight by approximately 17%
compared to the conventional all-steel door panel. In addition, weight reduction at the
outer side of the vehicle body concentrates the point of gravity further toward the centre
of the vehicle, contributing to improved stability in vehicle manoeuvring.

Going forward, Honda will continue its proactive research and development of leading
technologies in order to further enhance the performance and environmental credentials of
its products and manufacturing processes, as well as develop innovations to enable society
practical ways to enjoy the convenience, independence and fun that come from the freedom
of movement.

        Honda Press Office
        Honda (UK)
        Office: +44-(0)1753-590193


Source: PR Newswire