PULSED GMAW | VERMAAT TECHNICS| NETHERLANDS | FULLY AUTOMATED WELDING SYSTEMS

a modified spray transfer process in which the power source switches between a high peak current or voltage and a low background current or voltage between 30 to 400 times per second.
For many manufacturers, a switch from CV GMAW to pulsed GMAW with solid or metal-cored wire can deliver lower heat input, reduced spatter and cleanup, greater productivity, and decreased training time.
For manufacturers looking to make improvements in their welding operations - whether it’s reducing spatter and cleanup, decreasing the time spent on rework, or fixing bead profile issues - pulsed gas metal arc welding (GMAW) can deliver results. It offers the opportunity to introduce benefits that help save time and money and increase productivity.
To ensure success in implementing the process, it’s important to understand how pulsed GMAW works and how to determine what filler metal is the best choice for a specific application.
Pulsed GMAW: How It Works and the Benefits
The pulsed spray transfer mode is a modified spray transfer process. The welding power source rapidly switches the welding output between a high peak current and low background current. The peak current pinches off a spray transfer droplet and propels it toward the weldment, which helps create proper fusion. The background current maintains the arc but is too low for metal transfer to occur.
Because the weld pool gets to cool slightly during the background cycle, it allows for welding in all positions on thin or thick metals.
With pulsed GMAW, operators can run faster wire speeds while keeping a clean arc and bead profile. This reduces spatter, along with the time and money for cleanup.The ability to run faster wire feed speeds also increases travel speeds - one of the main drivers of heat input. When travel speed increases, heat input decreases, allowing pulsed GMAW to reduce distortion and burn-through.And because pulsed GMAW is generally an easy process to learn and use, it can help operations train new welders faster. Pulsed GMAW systems are designed with synergic control to help ensure that welders of all skill levels are using the right parameters for the job.These features help decrease the time and money spent on non-value-added activities - those activities that don’t directly contribute to throughput in a welding operation. These include grinding, cleaning spatter, and completing rework. Minimizing these activities helps operations improve productivity and reduce costs.