Spot and Seam Welding
Spot welding of copper conductors for electric motorsFor this application a high number of welds per part have to be realized. With scanner and fiber laser, the laser beam can be positioned from weld to weld within milliseconds. Adjusted scanner movements melt the copper so that broad welding gaps can be bridged. Due to their high absorption into highly reflective materials such as copper, the fiber laser is the right tool for this application. Another advantage of laser welding with the fiber laser is the low heat input due to very short process times. Therefore damaging the isolations because of high temperatures can be avoided.
Spot welding at housingsSmallest welding spots even on large working fields.
Spot welding at axial circular weld seamOptimum weld quality due to prime pulse-to-pulse stability < 1 % also coupled with smallest pulse energies.
What is Spot Welding?
If you need to join two pieces of metal together, spot welding will get the job done quick. It’s often used to teach people how to weld, so the process is less complicated than other types of welding.
Spot welding uses two copper alloy electrodes to concentrate welding currents into a small area, which creates welds at regular intervals on overlapping pieces of metal. When spot welding, you typically use sheets of metal with a thickness of 0.2 to 3 millimeters. The type of material most commonly used includes sheet metal, welded wire mesh and wire mesh.
Spot welding does not require shielding gas in order to complete the weld. You can use a specially designed spot welder to create these types of welds or use an MIG welder with a spot welding kit.
You will need to pay attention to the amount of pressure you apply to the welds. If you don’t apply enough pressure, the welds will be small and weak. But if you apply too much, you risk cracking the weld.
Spot welding takes a lot of practice to master, but once you do it’s the quickest and easiest way to get many of your home projects done. Also, don’t expect the weld to be iron-clad. Since it can only create localized joints, spot welds may lack the strength needed for larger projects.