Civan Lasers’ novel dynamic beam laser (DBL) technology promises to enable single-pass laser welding of 25 to 50-millimeter-thick metals. The DBL’s megahertz-level frequencies, which expose a broader set of parameters for enhanced control of laser welding processes by using unlimited beam shaping and up to 20 millimeters of focus position—influence how much control laser welders have over keyhole and melt-pool dynamics.
“These capabilities enable new applications for lasers,” explains Dr. Eyal Shekel, CEO of Civan. “DBLs are similar to electron-beam technology in its ability to wobble the beam in megahertz regimes. However, DBLs can do so without requiring a vacuum environment.”
A common process for welding thick sections is submerged arc welding (SAW). Typically, SAW and other processes require beveling the workpiece to allow the torch access to the joint root. The multipass process requires high heat input to the weldment and can generate a large heat-affected zone (HAZ) along with distortion.
Laser welding can focus a large amount of energy on a small spot. However, existing lasers are limited in welding thick sections and therefore are not commonly used.
The unique capabilities of the DBL enable thick-metal laser welding for the first time, bringing all the advantages of laser to metals in the thickness of 15 to 50 millimeters. These advantages include eliminating the need for beveling and reducing HAZ and distortion along with vastly higher welding speeds.
To offer a turnkey solution, Civan Lasers and AMET have collaborated to develop a laser welding system aimed at thick metals. The companies have partnered to develop the most advanced laser welding system for welding 15 to 50 millimeters metals.
The project has won a prestigious grant from the Israel-U.S. Binational Industrial Research and Development Foundation (BIRD Foundation) which aims to support collaboration between Israeli and U.S. companies.
The project began in March 2022, and the companies will present the first system in February 2023. The system will be produced in AMET’s Idaho factory. In parallel to building the machine, Civan Lasers is developing welding processes in their application lab in Israel. Civan has already demonstrated a 25-millimeter weld and is aiming to present 50 millimeters by the end of 2022.