Home > Jaguar to use Henrob’s self-piercing rivets on X350 saloon

Jaguar to use Henrob’s self-piercing rivets on X350 saloon

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Jaguar's new aluminium-intensive X350 saloon will be built with extensive use of self-piercing rivets in place of conventional spot welding.

Other UK vehicles are expected to follow suit.

The rivets will be used on the X350, the replacement for the current XJ saloon, as the technique to join various pressings, fabrications and castings.

Production begins at Jaguar's Castle Bromwich site at Birmingham in three months' time and the model will be the large single user of self-piercing rivets in the automotive industry.

Unlike conventional rivets, self-piercing rivets do not require a pre-drilled hole.

The rivet is driven into the material at high force, piercing the top sheets and spreading outwards into the bottom sheet of material, under the influence of an upsetting die, to form a strong joint.

Jaguar will use Kawasaki robots at Castle Bromwich to carry the riveting guns to the point of application.

Both hydraulic and electric riveting tools can be used. Rivets can be fed either by tape or by blow feed.

Self-piercing rivets are essential in the X350 because of difficulties associated with spot welding aluminium. At least 3,000 rivets will be required for each body, joining an array of materials.

Dick Elsy, director of product engineering at Jaguar Cars, described self-piercing rivets as "a strong, assured mechanical joint; a very robust process".

Self-piercing rivet technology was pioneered by Henrob of Flint in North Wales in 1985. Elsy described Henrob as "probably the best that we have access to".

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