The 4000W Laser Welding Machine is a thick-metal laser welding machine, featuring a spatter-resistant black-gold welding torch and dual-protection lenses to minimize contamination and wear during operation. Its stepper four-drive wire feeder supports seamless switching between single, dual, and triple wire feeding modes, enhancing weld bead width and fullness. It can even achieve weld bead buildup, delivering more stable and precise weld quality.
Take a closer look at our 4000W laser welding machine from every angle. From the body, handheld welding torch, and internal layout, every component is high-quality.
The 4000W Air Laser Welding Machine reliably welds plates ranging from 0.5 to 12 mm thick, making it widely applicable for common industrial metals such as stainless steel, carbon steel, and aluminum alloys. Tailored to diverse material properties and process requirements, the equipment delivers deep penetration welding with high efficiency and consistent results.
Suitable for 0.5–12 mm thicknesses, producing smooth weld bead formation with minimal heat-affected zone, ideal for structural components and pressure vessel applications.
Suitable for 0.5–12 mm thicknesses, delivering stable penetration depth and high strength, suitable for construction machinery and steel structure fabrication.
Suitable for 0.5–8 mm thicknesses, effectively controlling porosity and distortion to achieve uniform, dense welds.
The working principle of the air laser welding machine is “laser energy welding + self-generated shielding gas protection.”
The equipment generates high-purity inert shielding gas via a precision gas generator. Combined with a multi-stage vortex collision separation filtration system imported from South Korea, it ensures pristine gas purity, eliminating the need for additional welding gas purchases. A highly concentrated laser energy is produced by a Kempson customized chip and an American GW laser nitrogen generator systems.
This energy is precisely directed to the welding site through a multi-rotation anti-spatter welding torch, instantly melting the base metal and filler wire to form a robust weld. Simultaneously, under the stable control of the French Schneider electrical control system, the stepper four-wheel drive three-plus-one wire feeding mode adapts to plate thicknesses ranging from 0.5 to 12 mm. Single-sided welding achieves double-sided formation, while the protective gas synchronously isolates air to prevent weld oxidation. This ultimately delivers spatter-free, low-consumption, highly efficient, and stable welding results.
Measuring just 1.2 × 1.3 × 1.3 meters, the 4000W laser welder features a compact footprint that fits easily into any workshop without occupying excessive space, while its built-in gas generation system eliminates the need for external shielding gas, making it convenient, efficient, and ready for use. Check out the dimension diagram below for a detailed view of its size and layout.
| Model | KPS-ALW4000 |
|---|---|
| Laser Power | 4000W |
| Fillet Weld Thickness (Stainless Steel) | 11mm |
| Fillet Weld Thickness (Angle Steel) | 12mm |
| Fillet Weld Thickness (Aluminum Alloy) | 10.5mm |
| Automatic Wire Feeding | Φ0.8-2.0 |
| Wire Feeding Mode | Automatic wire feeding (Single, double, and triple wire switching) |
| Weld Bead Width | 1.5～8.0mm |
| Maximum Penetration Depth | 7.5mm |
| Total Power Consumption | ≤3.5kW |
| Cooling Method | Built-in water cooling |
| Chiller Power | 18000W |
| Power Requirements | 380V |
| Equipment Dimensions | 1.2*1.3*1.3m |
| Equipment Weight | ≈585kg |
| Self-Supplied Gas Type | 99.99% Argon/Nitrogen gas |
| *The handheld welding head comes standard with a 10-meter fiber optic cable, allowing for flexible and convenient long-distance welding outdoors. | |
The black gold laser welding gun specially developed by Kempson utilizes multi-rotation reusable protective lenses, a dedicated anti-spatter welding nozzle and gun tube, and a dual protection system with a high-temperature alarm device, effectively reducing subsequent consumable costs. In contrast, most competitors choose to equip their systems with inexpensive welding guns with easily damaged lenses, leading to frequent lens replacements and significantly impacting production efficiency.
This machine is suitable for welding carbon steel, stainless steel, and aluminum materials ranging from 0.5 to 12mm thick. It achieves smooth, strong, and spatter-free welds on various metals, finding extensive application across multiple industries including heavy machinery, metal fabrication, automotive components, and structural steel. The following images demonstrate different welding types and the machine’s welding results on various equipment.
The 4000W thick plate air laser welding system, characterized by its gas-free operation, flexible handling, and high welding efficiency, is widely adopted across industries including heavy-duty construction machinery components, mining equipment frames, container body welding, steel structure building components, heavy truck chassis, and large agricultural machinery. It meets the low-cost welding demands for various thick-walled metal plates while balancing operational convenience and weld strength.
Kempson is a 4000W air laser welding machine manufacturer and supplier in China, specializing in the R&D, production, sales, and service of thick-plate laser welding solutions. Our company possesses an in-house R&D team and extensive industry experience, with over 30 patented technologies and certifications, including ISO9001, CE, and FDA.
We provide a global service network and attentive after-sales support, offering customers a three-year warranty on complete machines and complimentary direct shipping of antifreeze for extremely cold production areas, with rapid response to technical needs. The company is committed to delivering efficient and reliable thick-plate laser welding solutions for global industrial manufacturing through innovative technology and comprehensive after-sales service. Contact our professional team to obtain customized welding solutions and technical support.
Yes. A 4000W laser welding machine is designed for heavy-duty industrial welding and can handle materials from 0.5 mm up to 12 mm thickness. With an 8 mm wide weld bead and deep penetration, it can achieve single-side welding with double-side forming, making it ideal for thick metal fabrication and structural components.
No. Kempson air laser welding system includes a high-precision gas generation unit that produces high-purity inert shielding gas internally. This eliminates the need to purchase external gas cylinders, helping manufacturers reduce operating costs and simplify production workflows.
High-quality systems like the Kempson 4000W laser welding machine use an anti-spatter black gold welding gun and precision power control, producing smooth weld seams with minimal spatter. In most cases, the weld surface requires little to no secondary grinding or polishing, improving overall production efficiency.
Yes. Kempson Industrial laser welding machine are built for stable long-term operation, which integrates Schneider electric control systems, advanced current filtering, and isolation protection, with stable performance, reduced failure rates, and consistent weld quality.
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