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Droplet Weld an Environmentally Friendly, Lead - Free Joining Technology Using Metal Droplets.

Objective

Up-coming legislation will forbid the use of lead-containing solders in the near future. Good alternatives for electrical interconnection have not been found. Alternative solder materials are much more expensive (factor 4), and have a lower though output (longer contact times of the product). Very often lead-free solders contain other environmental unfriendly components (such as bismuth and antimony). Gluing is limited to low temperature applications. Droplet weld is a novel alternative of a lead-free joining technology and this welding is using simple and low costs materials. In droplet welding a metal droplet is produced from a feed wire by local heating using a plasma arc or laser irradiation. A hot metal droplet is subsequently detached and will fall onto the parts to be joined. First tests have shown that a single hot droplet is sufficient to make a high temperature weld.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

N/A

Participants (7)

GRUNDFOS A/S
Denmark
Address
Poul Due Jensensvej 7
8850 Bjerringbro
HAAS-LASER GMBH & CO. KG
Germany
Address
39,Aichhalderstrasse 39
78713 Schramberg
LOUGHBOROUGH UNIVERSITY
United Kingdom
Address
Ashby Road
LE11 3TU Loughborough
LPKF MOTION & CONTROL GMBH
Germany
Address
Nuer Friedberg 1
98527 Suhl
MC. GREGOR WELDING SYSTEMS LTD.
United Kingdom
Address
69,Fred Dannatt Road 69
IP28 7RD Mildenhall
UNIVERSITY OF ERLANGEN-NUREMBERG
Germany
Address
Egerlandstraße 11
91058 Erlangen
UNIVERSITY OF LJUBLJANA
Slovenia
Address
Askerceva 6
1000 Ljubljana