Jaguar “Roadmap” rethinks self‐piercing technology

Describes how Jaguar Cars is evaluating a technology roadmap to assess future manufacturing processes.

Describes the major production line technologies that are under close scrutiny for the next ten years for use in the Jaguar Cars' production plants at Castle Bromwich and at Halewood, Merseyside, both in the UK. Technologies under review include ultrasonic welding, friction stir spot welding, laser welding and self‐piercing rivets.

The use of self‐piercing rivets is already used in production at Jaguar for the aluminium‐bodied XJ saloon. But developments of the process are already underway in readiness for the next new model. However, at the same time, engineers are examining other techniques including ultrasonic joining and friction stir spot welding, both of which at the subject of research work in the US and the UK. Use of pedestal guns and blow feeding devices is expected to bring improvements in cost.

Engineers at Jaguar are carrying out research and development, both in‐house and with various research bodies and universities to establish the most beneficial processes for the joining of aluminium sheet, extrusion and cast components that go to form an aluminium car body. For successful joining aluminium requires low heat input solutions. At present, self‐piercing rivets offer the best solution, but Jaguar engineers are looking at other processes including ultrasonic joining and friction stir spot welding. The aim is to find processes that are fast and cost‐effective. In the meantime, Jaguar will continue to use self‐piercing rivets for aluminium structures.

The practical implications of the work will lead to reduced cycle times which in turn will help to make the manufacture of aluminium car bodies more cost‐effective.

BMW claims it is the first car maker to make use of bowl‐feeding self‐piercing rivets for the manufacture of aluminium body‐in‐white.