Seam welding is a variation of resistance spot welding.
In resistance seam welding, however, the welding electrodes are motor driven wheels as opposed to stationary rods. The result is a 'rolling' resistance weld or non-hermetic seam weld. This process is most often used to join two sheets of metal together:
Typical AMADA WELD TECH equipment used for resistance seam welding include our STA Series AC weld controls, HF2 high frequency inverter weld control, SM8500 seam welding system and AF8500 lid placement, tacking and sealing system.
For more information about the resistance welding process read our Fundamentals of Resistance Welding.
In laser seam welding, the part to be welded is moved or rotated under the laser focus head allowing laser spot welds to overlap. Key parameters for laser seam welding are the pulse repetition rate, measured in pulses per second (Hz) and the linear part travel rate or welding speed. Spot overlap percentage (a function of speed), pulse repetition rate and focused spot diameter are also used in the equation for determining the best laser for the job and for determining the total weld cycle time. Laser welding is used to make hermetic seam welds:
Laser seam welding applications include sensors, radar components, battery housing, conductors for thin film cells, pacemaker cases, and insulin pump cases.
All of AMADA WELD TECH's welding lasers may be used for seam welding applications; the model selected depends on the application success requirements.
And for more information about the laser welding process read our Fundamentals of Laser Welding