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04/11/2020 - 05/11/2020

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EJOT to demo 'light alloy to high strength steel' EJOWELD process at EDS

EJOT to demo 'light alloy to high strength steel' EJOWELD process at EDS

EJOT, the German-owned fastener manufacturer, is increasing public exposure of its new Ejoweld process; a sophisticated friction-weld based assembly system designed to create an automated high strength join between light-weight materials and high-strength steel.

EJOT's UK based application engineers will use a customised rig to demonstrate the Ejoweld assembly process, on Stand E28 at the Engineering Design Show at Coventry's Ricoh Arena in October.

Five years of intense development in Germany, Ejoweld has been driven by market demands for manufacturers to build lighter vehicles. The challenge for automotive design engineers becomes how to achieve strong, light weight body-in-white structures when high strength / light weight materials cannot be secured effectively by means of a traditional self-pierce rivet. The Ejoweld process successfully creates this high strength joint - typically between light alloys and boron steel of up to 1800 megapascals.

Ejoweld's advanced friction weld system deploys specially developed components to secure structure of assembly; a pin for single-sided fixing, and an alternative element for double sided access. The four key-stage cycle of the joint creation completes in less than one second. From the first application of axial loading, the process is then about how the EJOT component reacts with the system's high revolution speeds to pierce the top layer and underfill the two contrasting materials, that breaks new ground. No sparks or flash are created and the process creates very little noise whilst localising heat generation.

Ejoweld will take centre stage on the EJOT stand, but the team will equally promote all EJOT threadforming technology. All base products are designed to achieve cost reduction through more efficient fastening and parts rationalisation.


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