Five New Products That Are Facilitating GMAW

Gas metal arc welding (GMAW) is an arc welding process that uses an arc between a continuously fed consumable electrode and the weld pool. The process is used along with shielding from an externally supplied gas and without the application of ...

AWS Publications | February 9, 2021 | Processes
Welding Digest ►  Five New Products That Are Facilitating GMAW

Gas metal arc welding (GMAW) is an arc welding process that uses an arc between a continuously fed consumable electrode and the weld pool. The process is used along with shielding from an externally supplied gas and without the application of pressure.

Because GMAW is a commonly used process, every year brings forth new GMAW products that enhance weld quality and facilitate the process. The following showcases five of these new products.

 

Welding machine suits numerous applications

Crafted by Weldcote, the MIG 200 Striker multipurpose welding machine (Figure 1) joins steel, stainless steel and aluminum. Designed for GMAW, gas tungsten arc welding (GTAW) and shielded metal arc welding (SMAW), the dual-voltage (115 or 230 V) system provides digital readouts that automatically identify the power grid voltage and operates accordingly. The welding machine also features the power factor corrector, which increases power efficiency, reduces input power requirements and stabilizes the welding current. As a safety precaution, it has a voltage reduction device that lowers the voltage across the outputs when idling. Its other highlights include a hot-start function for easy ignition of the weld arc, an arc-force function to prevent the electrode from sticking to the workpiece and a power-saving smart fan that reduces dust. The compact welding machine comes standard with a flow gauge regulator. It is also offered with optional equipment, such as a spool gun, 15-ft GMAW gun and 12-ft GTAW torch (i.e., measured from the connection in the machine to the end of the GMAW gun/GTAW torch, including handle/cable, etc.).

 

Figure 1-1Figure 1: The MIG 200 Striker multipurpose GMAW machine by Welcote

 

Updated software enables pipe welding

Made by The Lincoln Electric Co., the updated software for the PIPEFAB™ welding system (Figure 2) offers process control options that improve simplicity and machine performance for operators and managers. It delivers additional memory functions, such as the memory-only mode, to allow managers to limit the machine capabilities to only the processes and parameters they have saved. Users can further customize memory names that appear on the screen when the memory is loaded and active. Additionally, the software adds a weld mode update for the HyperFill® twin-wire GMAW process. Suited for heavy-wall pipe and vessel applications, this process expands the system’s welding capabilities to achieve deposition rates above 18 lb/h. Other enhancements include weld modes for stainless steel SMAW as well as optimized Smart Pulse™ performance for stainless steel gas mixtures.

Figure 2

Figure 2: The PIPEFAB™ welding system with updated software by The Lincoln Electric Co.

 

Line of GMAW machines saves on electricity

Produced by EWM AG, the Taurus Steel series of GMAW machines (Figure 3) meet the requirements of the new European Ecodesign Directive with their inverter technology, which achieves resource efficiency and cost savings. This technology also allows the welding machines to serve as an alternative to step switch-controlled machines. Designed for working with steel, the welding machines come in three models with 350, 400 and 500 A. The 350- and 500-A models boast a duty cycle of 60% at maximum current, while the 400-A model achieves a 100% duty cycle for easy welding with complete joint penetration.

Figure 3

Figure 3: The Taurus Steel series GMAW machines by EWM AG.

Blog helps welders calculate heat input for GMAW

 

Created by Kemppi Oy, the blog titled Calculation of Heat Input in MIG/MAG Welding provides guidance on how welders can figure out the heat input for GMAW according to the requirements in EN-ISO 15614-1:2017, Specification and qualification of welding procedures for metallic materials — Welding procedure test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys. Using tables, figures, equations, and photos, the blog covers the following topics: requirements set by standards, formulas for calculating arc energy, how the formulas are applied, the heat input calculation formula, voltage losses in welding cables, practical welding tests and how new GMAW machines facilitate heat input calculations. Visit weldingvalue.com to read the free blog.

 

Blog delivers advice on welding machine setup

 

Provided by Forney Industries, https://www.forneyind.com/, the blog called Forney 220 Multi-Process Welder Quick Start Guide helps welders set up their Forney 220 MP welding machines. The blog explains the first steps required for machine setup and provides troubleshooting tips. The process setups covered are GMAW, SMAW, GTAW, and flux cored arc welding. The free blog can be accessed at askforney.com.

 

Reference

AWS A3.0M/A3.0:2020, Standard Welding Terms and Definitions. Miami, Fla.: American Welding Society.

 

This article was written by Katie Pacheco (associate editor of the Welding Journal) for the American Welding Society.