POWER RAMP, optimized welding at critical points.

POWER RAMP, optimized welding at critical points.

POWER RAMP is a software function developed by SISMA that affects the laser welding process by optimizing its performance, specifically at two critical points: the start and end of the welding process. By modulating the power delivered by the laser beam in the initial and final phases of the process, POWER RAMP is able to avoid the onset of porosity and cracks, marginal incisions – surface depressions that can be generated at the end of the weld bead, as well as prevent the formation of any other aesthetic and functional defects.

POWER RAMP operates, at the start of the welding process, by reducing the power supplied by the laser beam and gradually increasing it until the selected nominal value is reached. In the final phase, POWER RAMP operates inversely, reducing the nominal power delivered by the laser beam to obtain a gradual shutdown.

• It allows optimizing the metal solidification and melting phases so as to avoid sudden temperature changes, thus reducing the shrinkage tensions of the material.
• The machined piece is free from functional defects, and therefore conforms to its original design intent.
• The welding bead appears aesthetically uniform and does not require subsequent polishing jobs.

POWER RAMP can be implemented using SISMA SWT and SISMA SWS welders with fiber sources.