Tungsten Copper Resistance Welding Influential Factors
Tungsten copper is used as electrodes in resistance welding, which includes spot welding, seam welding, butt welding and projection welding.
Know Tungsten
Tungsten Copper Resistance Welding Influential Factors
There are many factors, which can influence the welding effort of resistance welding, which is applied tungsten copper as electrodes, such as welding current, time, pressure, electrode shape and properties and workpiece surface condition.
1.0 Influence of welding current
The influence of current on heat generation is greater than both resistance and time. The main causes of current changes are grid voltage fluctuations and changes in the impedance of the AC welder's secondary loop.
2.0 Effect of welding time
In order to ensure the size of the nugget and the strength of the solder joint, the welding time and the welding current can complement each other within a certain range.
3.0 Influence of electrode pressure
The electrode pressure has a significant effect on the total resistance R between the two electrodes, and as the electrode pressure increases, R decreases significantly.
4.0 Influence of electrode shape and material properties
Since the contact area of the electrode determines the current density, the resistivity and thermal conductivity of the electrode material are related to the generation and loss of heat, so the shape and material of the electrode have a significant impact on the formation of the nugget.
5.0 Influence of the surface condition of the workpiece
Oxides, dirt, oil and other impurities on the surface of the workpiece increase the contact resistance. An oxide layer that is too thick may even make the current flow impossible. Partial conduction, due to excessive current density, will produce splashes and surface burns.
More details, please visit http://h5.chinatungsten.com/tungsten-copper/copper-bonded-tungsten-electrode.html.
Any feedback or inquiry of Tungsten Copper, please feel free to contact us:
Email: sales@chinatungsten.com
Tel.: +86 592 512 9696 ; +86 592 512 9595
Fax.: +86 592 512 9797