Laser Welding VS. Traditional Welding of Motor Cores

The choice of welding method can significantly impact the quality, efficiency, and overall performance of the final product. Laser welding and traditional welding techniques are two prominent methods utilized in motor iron core manufacture, laser welding vs. traditional welding with its own set of advantages and limitations.  In this post, we will delve into the difference between laser welding and traditional welding.

Traditional Welding in Electric Motor Lamination Stacks Manufacturing

What Are Traditional Welding Techniques?

Traditional welding methods have been the backbone of motor core manufacturing for decades. They include Resistance Spot Welding, Tungsten Inert Gas (TIG) Welding, and Metal Inert Gas (MIG) Welding. These techniques have proven their reliability in numerous applications.

Process and Application of Resistance Spot Welding (RSW)

TIG welding motor stator

Resistance Spot Welding is a traditional welding technique used in motor core manufacturing. It operates on the principle of electrical resistance. In RSW, two metal sheets or components clamp together, and an electrical current passes through them.

The resistance to the current flow generates intense heat at the point where the metal sheets touch. This localized heat causes the metal to melt, and when the current turns off, the molten metal solidifies, creating a strong weld.

Resistance spot-welding has high speed and efficiency, making it suitable for high-volume production. In motor core production, RSW can be employed for tasks such as securing laminations and welding core components.

Process and Application of Tungsten Inert Gas (TIG) Welding

TIG welding(Tungsten Inert Gas) process utilizes a non-consumable tungsten electrode to create an electric arc that generates the heat required to melt and fuse the welded metals.

A shielding gas, often argon, protects the weld area from atmospheric contamination, and a filler metal is usually used. The gas forms a protective shield around the arc and the molten weld pool, preventing oxidation and ensuring a clean and strong weld.

This welding technology produces clean, precise welds on any metal, ensuring laminate the stator stacks together with quality. TIG welding is normally used for thin material and medium-sized cores.

Process and Application of Metal Inert Gas (MIG) Welding

Metal Inert Gas (MIG) Welding, also known as Gas Metal Arc Welding (GMAW), is a semi-automatic or automatic welding process. In MIG welding, a consumable wire electrode is fed continuously through a welding gun.

The electric arc heats the electrode wire and the metal workpieces, causing them to melt and fuse together. A shielding gas, typically a mixture of argon and carbon dioxide, protects the weld area from contamination.

MIG welding has high speed, making it suitable for a wide range of applications. In motor core manufacturing, MIG welding is suitable for thicker materials, such as joining components in large-sized motors and generators.

Limitations and Advantages of Traditional Welding

While traditional welding processes are proven techniques, they come with their own set of pros and cons. They have their robustness and suitability for high-volume production.

However, they may introduce heat-affected zones (HAZ), leading to potential distortions and reduced precision, especially in thin materials.

Laser Welding in Electrical Machine Iron Core Manufacturing

What Is Laser Welding Technology?

Laser welding is one of the welding methods we often use. It employs high-intensity focused beams to melt and fuse metals together. Variations include YAG, Fiber, and CO2 laser welding systems. The Laser Welder is capable of welding a large number of materials including carbon steel, high strength steel, stainless steel, titanium, aluminum, precious, and dissimilar metals.

Process and Application of Laser Welding

Laser welding is a process that joins two pieces of metal together using a focused laser beam. The light from the laser welder melts the electrical steel at the joint, forming a strong bond between the two pieces. The weld created by this process is usually much stronger than that created by conventional welding techniques.

Our automatic laser welding machine adopts a 4-way fiber transmission, manual feeding, automatic pressing into the fixture, rotating three times, and completing 12 welds. laser welding is used in the energy production sector.

laser welding

Limitations and Advantages of Laser Welding

Laser welding offers several advantages over traditional welding methods. It has high precise control, enabling the creation of fine, high-quality weld seams with minimal heat input. This precision results in reduced distortion, making laser welding an excellent choice for intricate and delicate components. 

Additionally, the non-contact nature of laser welding minimizes the risk of contamination and simplifies automation, making it ideal for high-volume production.

If you’re looking for a reliable way to join metal parts with precision and accuracy, then laser welding may be your best bet!

However, laser welding has limitations. Initial equipment costs can be relatively high, and the technology may require specialized training for operators. Additionally, while laser welding is exceptionally well-suited for thin materials, it may have limitations when welding thicker sections. 

Key Differences Between Laser Welding and Traditional Welding

Heat Input and Heat Affected Zone (HAZ)

Traditional welding methods often introduce a larger HAZ due to the heat generated during the process. Laser welding better than traditional welding, in contrast, minimizes heat input and the associated HAZ, making it ideal for thin materials and applications demanding minimal distortion.

Precision and Control

Laser welding is a better option that offers unparalleled precision and control, allowing for fine weld seams and intricate work. Traditional welding methods, while reliable, may not achieve the same level of precision, especially in complex or delicate components.

Speed and Efficiency

In terms of speed, laser welding can be more efficient, particularly for repetitive, high-volume tasks. Traditional welding methods may be slower due to setup and cooldown times.

Material Compatibility

Laser welding is an excellent joining method for thin, delicate metal and dissimilar materials. Traditional welding methods may require specific consumables and processes depending on the welded material.

Environmental Impact

Laser welding tends to be more environmentally friendly as it generates minimal fumes and requires fewer consumables compared to traditional welding, which may produce more emissions and waste.

Applications Laser Welding

We use laser welding to manufacture motor cores and applications in various industries. These include automotive motors, industrial motors, wind and solar power generators, rail transportation motors, diesel generators, elevator traction motors, transformers, medical devices, etc.

Elevate Your Motor laminations with Motorneo’s Expertise

We offer riveting, cleating, gluing, laser welding, TIG + MIG welding, and the self-bonding process for stack and bond laminations.

Having multiple 25ton-300ton press punching, automatic stacking and welding machines, and automatic winding machines. Quality control equipment includes silicon steel detectors, CMMs, projector inspections, etc.

Our motor laminations production includes permanent magnet motor laminations, induction motor laminations, servo motor laminations, brushless DC motor laminations, universal motor laminations, shade pole motor laminations, and asynchronous motor laminations.

lamination stacks of industry motor cores


Compared with traditional welding, motor core laser welding technology has significant effects and advantages in improving motor performance, reducing noise and energy consumption. Through continuous technological innovation and application promotion, it is believed that this advanced welding method will be more widely used in the field of motor manufacturing and promote the further development of electric drive systems.


How does the choice between laser welding and traditional welding impact the performance of motor cores in electrical machines?

The choice between laser welding and traditional welding techniques has an impact on the performance of motor cores in electrical machines. Laser welding, with its precision and minimal heat input, results in finer, high-quality weld seams and reduced distortion. This precision is especially critical in applications where tight tolerances and minimal heat-affected zones are paramount.

On the other hand, traditional welding methods, known for their versatility and efficiency, may introduce more heat and potentially larger heat-affected zones. While they excel in certain scenarios, such as thicker materials or cost-effective production, they may not deliver the same level of precision as laser welding.

What are the factors that affect the choice of laser welding and traditional welding?

Material selection is a critical consideration, as laser welding is well-suited for thinner materials, while traditional methods may be more versatile with thicker ones.

Production volume and speed play a role, with laser welding often favored for high-volume, automated tasks, and traditional welding methods suitable for smaller-scale production. Weld quality requirements, including precision and minimal heat-affected zones, can sway the decision.

Try to contact us for high-quality motor cores in China.