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→Horizontal Wire or Profile Welding
===== Horizontal Wire or Profile Welding=====
During horizontal welding the wire or profile contact material is fed at a shallow angle to the carrier strip material ''<xr id="fig:Horizontal profile cut-off welding (schematic)"/> (Fig. 3.10)''. <figure id="fig:Horizontal profile cut-off welding (schematic)">
[[File:Horizontal profile cut-off welding (schematic).jpg|right|thumb|Horizontal profile cut-off welding (schematic)]]
</figure>
The cut-off from the wire or profile is performed either directly by the electrode or in a separate cutting station. This horizontal feeding is suitable for welding single or multiple layer weld profiles. The profile construction allows to custom tailor the contact layer shape and thickness to the electrical load and required number of electrical switching operations. By choosing a two-layer contact configuration multiple switching duty ranges can be satisfied. The following triple-layer profile is a good example for such a development: The top 5.0 μm AuAg8 layer is suitable to switch dry circuit electronic signals, the second or middle layer of 100 μm Ag/Ni 90/10 is used to switch relative high electrical loads and the bottom layer consists of an easily weldable alloy such as CuNi44 or CuNi9Sn2. The configuration of the bottom weld projections, i.e. size, shape, and number of welding nibs or weld rails are critically important for the final weld quality.
Because of high production speeds (approx. 700 welds per min) and the possibility to closely match the amount of precious contact material to the
required need for specific switching applications, this joining process has gained great economical importance.
=====Tip Welding=====