New Miller RMD Mig Welding on Pipe

Welding Techniques and Equipment Overview

Introduction to the Session

• The video features Rodriguez at South Coast Welding Academy in Houston, Texas, introducing a session with Miller representatives.

• Wiley from Miller is present to demonstrate RMD (Regulated Metal Deposition) on pipe welding, alongside Tony Sadavia, a specialty combo welder and designer fabricator.

Equipment Setup

• The academy has recently expanded its equipment inventory, including the Big Blue 400 Pipe Pro powered by a Mitsubishi diesel motor.

• The setup involves connecting the machine to a smart feeder for open root MIG pipe welding. The machine supports various welding processes: stick, MIG, carbon arc gouging, and TIG.

Welding Parameters Configuration

• For RMD setup, ER70S6 .035 solid wire is used with C25 gas. Settings are adjusted for carbon steel applications.

• Initial settings include wire feed speed at 175 and arc control set to zero. These factory settings provide a baseline for adjustments during welding.

Preparing for Welding

• A 1/8 inch root opening with a slight land of 1/16 inch is prepared for out-of-position welding starting from the top of the pipe downwards.

• Tapered consumables are utilized to ensure proper gas coverage in the bevel area of the pipe for optimal weld quality.

Execution of RMD Technique

• Antonio begins welding at 12 o'clock position on the pipe using a weaving technique initially to prevent puddle collapse before transitioning into straight dragging as he moves downwards.

• Observations indicate that RMD allows smooth transfer without needing a keyhole; this contrasts with traditional short circuit methods.

Key Considerations During Welding

• Maintaining proper stick-out distance is crucial; adjustments are made based on sound feedback from the weld puddle.

• A consistent sound indicates good control over the weld; if issues arise (like hearing an arc inside), it suggests being too far ahead in movement.

Discussion on Equipment Versatility

• Various machines can run RMD effectively; today’s demonstration uses Smart Feeder connected to Big Blue 400 Pipe Pro.

Understanding the Importance of R&D in Welding Training

Bridging the Gap for New Welders

• The discussion highlights the differences between traditional and modern welding techniques, emphasizing how new welders may struggle with older machines that have worn markings.

• There is a call to make training more accessible for newcomers in the welding trade, as there is a shortage of skilled welders. The importance of supporting students with updated equipment is acknowledged.

• Utilizing research and development (R&D) can significantly benefit new welders by helping them understand arc behavior and puddle dynamics, which enhances their skills and confidence.

• Industry feedback indicates a demand for new welders to be proficient in R&D processes before entering the workforce, reducing the need for additional training from employers.