VIDEO 13 Pengelasan 2G HORIZONTAL

Summary

This video demonstrates the V-joint welding process in a horizontal position (2G welding), showcasing the step-by-step techniques involved. The presenter explains the preparation of the V-joint, including setting the correct angles, creating the root face, and selecting the right electrode. Key details about polarity settings, amperage adjustments, and safety precautions are discussed. The welding process is carried out in stages, including filler and cover welds, to achieve a smooth and solid joint. The tutorial is practical, emphasizing proper technique and equipment handling for a successful weld.

Takeaways

• 😀 The video demonstrates the process of welding a V-joint in a horizontal position (2G).
• 😀 The V-joint has a thickness of 8 mm, a width of 3 cm, and a length of 10 cm.
• 😀 The angle of the V-joint is 30° on both sides, resulting in a 60° total angle between the edges.
• 😀 A root face of 2 mm is created using either a bench grinder or an angle grinder for precision.
• 😀 The root gap is adjusted using an E7016 electrode, with a diameter of 2.6 mm, and the welding machine is set to DC-negative polarity.
• 😀 The welding current is set to 50 amps during the root pass to ensure a stable arc and quality weld.
• 😀 The horizontal welding motion involves a half-circle or reverse C-shape movement, ensuring the weld pool remains controlled.
• 😀 After the root pass, the weld area is cleaned before filler welding to remove any impurities.
• 😀 For filler welding, the electrode is switched to DC-positive polarity, and the current is increased to 90 amps.
• 😀 Two filler passes are made, with the second pass leaving a gap of 1-2 mm to allow for additional layers.
• 😀 The final pass, or cover pass, uses an E7018 electrode with a diameter of 3.2 mm to ensure a strong and smooth finish.

Q & A

What is the focus of the welding demonstration in the video?

The video demonstrates V-groove welding in a horizontal position, also known as the 2G position.

What are the dimensions of the workpiece being welded in the demonstration?

The workpiece is 8 mm thick, 3 cm wide, and 10 cm long.

What welding technique is used to create the root face?

The root face is created using either a bench grinder or an angle grinder, with a thickness of 2 mm.

How is the root gap for the welding prepared?

The root gap is set using a 2.6 mm electrode, which is bent and inserted to form a gap of 2.6 mm.

What polarity setting is used for welding in the demonstration?

The polarity is set to DC negative (DCN) for the welding process.

What is the recommended amperage for welding the root pass?

The amperage is set to 50 amps for the root pass welding.

What electrode type and size is used for the root welding?

A 2.6 mm E7016 electrode is used for the root welding.

What welding technique is applied for filling the joint?

The filler pass is done with a horizontal welding technique, using a 7016 electrode in the positive polarity.

What is the recommended amperage for the filler welding?

The amperage for filler welding is set to 90 amps.

How is the final cover pass completed?

The cover pass is done with a 3.2 mm E7018 electrode at 90 amps, and two layers are applied for the final result.