Is Laser Welding a Good Fit for Your Operation?

Why manufacturers are considering laser welding

Finding ways to improve productivity and reduce costs are important factors in any welding application. Companies often look at technology advancements to achieve these goals, but many operations might not consider laser welding, which is frequently perceived as too expensive or complicated.

Today, that perception is changing. Advancements in laser welding technology, including operator-friendly solutions like the Miller® OptX™ handheld laser, have made it more accessible and affordable than ever. In many applications, especially in sheet metal, laser welding can deliver significant productivity gains and a fast return on investment.  

So, is laser welding right for your sheet metal operation? Start by understanding its key factors and benefits. 

Benefits of laser welding systems

Laser welding, including solutions like the OptX handheld laser welder in 1kW and 2kW models, offers measurable advantages over traditional processes like TIG, MIG and resistance spot welding:

1. Faster travel speed
   1. 5–10x faster than TIG welding  
   2. 3–5x faster than MIG welding (in some applications)
2. Low heat input  
   1. Reduces distortion and burn-through on thin materials  
3. High precision and consistency
   1. Ideal for automated welding applications  
4. Minimal setup downtime
   1. Pre-engineered systems allow for quick installation  

For operations focused on sheet metal or automated production, these benefits can translate directly to improved throughput and reduced labor costs. 

Advancements in laser welding

The use of laser welding continues to grow in automated welding applications due to advancements in technology and increased affordability.

Older vs. modern systems

Laser welding uses a laser to join pieces of metal. Traditionally, high-powered lasers used carbon dioxide as the medium and had a wavelength of about 10 microns. A laser of this wavelength cannot be transmitted through a fiber optic cable, making it difficult to automate a laser welding process.

Technology advancements have moved the industry forward in this regard. The evolution of 1-micron wavelength lasers means that the laser can be transmitted through fiber optic cable, making it more easily automated for welding.

Lower costs through diode efficiency

In addition, 1-micron wavelength lasers are typically powered by diodes.  As diode technology has improved:

• Fewer diodes are needed to generate power
• Overall system costs have decreased
• Cost per watt continues to drop
   

These advancements make laser welding more accessible for a wider range of operations. 

Why laser welding works well for sheet metal

Parts that operations traditionally TIG weld and that require a high-quality appearance are good candidates for conversion to a laser welding process. These factors make laser welding especially well-suited for sheet metal applications.

Sheet metal is typically very thin and requires a low heat input in welding. It’s also often used in applications that require high aesthetic quality or cosmetic results, such as:

• Appliances
• Signs
• Elevator panels  
   

In many cases, laser welding offers several advantages, including:

• Eliminate the need for filler metal or shielding gas
• Produce a low-profile weld bead
• Reduce or eliminate grinding and cleanup
   

For example, in electrical box manufacturing, MIG welding often requires post-weld grinding at outside corners. Switching to laser welding can remove this step entirely, saving time and labor costs.

Understanding laser welding modes: Conduction vs. keyhole mode

Laser welding operates in two primary modes: conduction and keyhole, depending on energy density.

Conduction mode (low energy density)

• Larger spot size, lower power
• Heat transfers through the material via conduction
• Produces a smooth, controlled weld puddle
   

Best for:  

• Cosmetic welds
• Precision applications (e.g., visible corners, signage)
   

Keyhole mode (high energy density)

• Smaller spot size, higher power concentration
• Creates deep penetration welds
• Vaporizes material to form a “keyhole”
   

Best for:  

• Joining stacked or overlapping materials
• Replacing resistance spot welding
   

Operations can use the same laser welding system for both conduction mode and keyhole mode. By increasing the power or reducing the laser spot size, this changes the mode from conduction to keyhole. 

Benefits of pre-engineered laser systems

1. Fast and simple integration
   1. Delivered pre-assembled on a single platform
   2. Can often be installed and operational the same day
   3. Comparable to integrating other robotic welding cells
2. Built-in safety features
   
   Laser systems must contain all light within the enclosure for safety. Systems that meet this requirement can achieve a Class 1 safety rating, meaning: 
    
   1. No additional eye protection is needed outside the cell
   2. Greater flexibility in shop floor placement
3. Test before you invest
   
   Many manufacturers offer testing labs where you can:
    
   1. Run sample parts
   2. Evaluate weld quality
   3. Determine fit for your application 

Is laser welding right for your operation?

Laser welding is no longer a niche or overly complex solution — it’s a practical option for many modern fabrication environments.

It’s particularly well-suited for sheet metal welding, automated production lines or applications requiring precision and aesthetics.

For operations now using MIG, TIG or resistance spot welding, a switch to laser welding can significantly improve productivity — saving time and money while still producing high-quality welds.