Coldweld – Joining Non-ferrous Metals Machinery

The Coldweld Process

Cold welding is a method for joining non-ferrous metals and their alloys without using heat, fillers or fluxes. Round wire sections, dissimilar materials and materials of different sizes can all be welded with BWE’s proven cold welding technology. A cold weld is generally stronger than the parent material and has the same electrical characteristics.

In order to obtain a true weld all contaminants (oxides, oils, chemicals etc) must be removed so that clean surfaces can be brought together. BWE’s cold welding machines achieve this by using a multiple upset technique which ejects the contaminated material from the weld zone eliminating the need for any special preparation.

A wide range of cold welding machines is available covering applications from rod to fine wire. BWE offers a facility for test welding customers’ material to confirm its suitability for cold welding.

Cold welding machines and dies have been supplied world-wide to the wire & cable industry from BWE’s Ashford factory since 1969.

Today, many machines and dies are manufactured by BWE’s subsidiary company, BWE Shanghai Ltd. BWE Shanghai supplies the Chinese domestic market and exports through BWE and BWE’s North American associate Koldweld LLC. Final assembly of powered machines is carried out by BWE in the UK where the electrical control circuitry is also built to ensure strict compliance with IEC Regulations.

All dies are hand-lapped to the highest possible standard. For the Chinese domestic market this is carried out in Shanghai while for European and most other markets this is still based in the UK where substantial stocks of unfinished dies are maintained to ensure a rapid response.

In order to obtain a true weld all contaminants (oxides, oils, chemicals etc) must be removed so that clean surfaces can be brought together. BWE’s cold welding machines achieve this by using a multiple upset technique which ejects the contaminated material from the weld zone eliminating the need for any special preparation.

A wide range of cold welding machines is available covering applications from rod to fine wire. BWE offers a facility for test welding customers’ material to confirm its suitability for cold welding.