How to Choose a Welding Process

How to Choose a Welding Process

1. Argon Arc Welding (TIG)

Characterized by low heat input, excellent weld bead formation, and minimal deformation; suitable for thin sheets (0.5–3 mm) as well as stainless steel and aluminum. However, it is slow and entails high labor costs.

2. MIG/MAG

High efficiency; suitable for medium-to-thick plates and long weld seams. Requires post-weld cleanup due to spatter, and the aesthetic finish is inferior to TIG.

3. Resistance Spot Welding

Used for overlapping sheets; offers high efficiency and minimal deformation, making it ideal for mass-producing thin-sheet components. The spot weld diameter is typically controlled at 4 to 5 times the square root of the sheet thickness (in mm); excessive proximity between weld spots causes current shunting, leading to weak or defective welds.

4. Laser Welding

Features the smallest heat-affected zone, narrow weld seams, and minimal deformation; suitable for cosmetic and precision parts. However, it demands strict control over assembly gaps—excessive gaps result in burn-through or incomplete welds.

5. Robotic Welding

Used in conjunction with tooling; offers the best consistency and is ideal for products with stable, high-volume production runs.