Laser welding with ALPHA LASER laser welding devices

Our laser welding systems yield high-strength precision seams

Whether joint welding or deposition welding, with wire or with powder: our goal is to make the laser welding process ever more precise, application-oriented, and faster. The good controllability of laser energy allows welding of metallic materials with high melting temperatures or high thermal conductivity. Materials that are otherwise difficult or impossible to fuse can often be jointed by laser welding.

Laser technology is indispensable when it comes to mechanically solid, precise, and visually appealing joints. Our laser welding systems use fiber lasers and Nd:YAG lasers for pinpoint energy input that results in less heat and thus prevents distortion of the material. Laser welding yields a smooth, oxide-free surface and a slim seam on butt welds, overlap welds, or fillet welds. Some of our laser systems can also be used for powder deposit welding. This process is perfectly suited to protect your components and tools as well as increase their service life, or for applying material even faster over larger areas.

What are the advantages of laser welding?

Preheating of the material is usually not necessary: ??With laser welding, energy is very selectively introduced into the workpiece, which significantly reduces the heat impact.
Significantly low thermal distortion
high mechanical strength of the weld seam
The material deposition can be flexibly influenced and controlled by the choice of the welding wire

How does laser welding work?

With laser welding, light is focused on a 0.2 to 2 mm small spot via the focusing optics. The energy input at the focal spot is very high, which causes the material surface to melt quickly. Depending on the welding requirements, the joint can be made with or without different filler metals (wire). At the same time, the weld seams are cooled again at high speed due to the temperature difference in the workpiece. As a result, the thermal distortion of the material is very low.

What is the difference between CW laser welding and pulsed laser welding?

When welding in CW mode, a continuous melt is the result. When welding in pulsed mode the melt cools during the pulse pauses, which results in a lower welding depth, less distortion on thin components and a lower energy input into the material.

CW laser welding or “CW deep welding”, on the other hand, achieves large welding depths through high energy densities (high average power with a small focus diameter). The “CW thermal conduction welding” process is also used for build-up and joint welding of crack-prone base materials, which enables a very homogeneous weld metal without micro-cracks, depending on the joined material.

Laserhärten

Additive Fertigung

Pulverauftragsschweißen

Suitable Products

ALM Mobile welding laser with short set-up times and great flexibility at work. Open product	AL-CROSS Mobile fiber laser for precision laser welding with plenty of storage space and a well thought-out transport concept. Open product	ALFlak Max Mobile laser welding device with extra long reach for welding on large components. Open product
ALFlak \| ALFlak Fiber Laser welding system for programmed or manual welding. Available as Nd:YAG or fiber laser. Open product	AL-Serie Lamp-pumped laser source with flexible and extensive equipment. Available from 120-500 W. Open product	AL-F OEM Fiber laser source with flexible and extensive equipment. Available from 300-900 W. Open product
AL-Fiber Fiber laser source with flexible and extensive equipment. Available from 300-900 W. Open product	AL-IN The AL-IN is a very flexible and robust laser system for welding small and large components. Open product	AL-TW Stable working table with integrated fiber laser. Available with 300, 450, 600 or 900 Watts. Welding in pulsed mode or in continuous mode is possible. Open product
ALW / ALW Fiber Laser welding in the manufacturing environment without additional safety measures. Choice of laser source and laser power. For workpieces up to 400 kg. Open product	ALV / ALV Fiber Compact laser welding system that can also be placed in a small workshop. And yet everything is included: laser, travel system, extraction and laser safety. For workpieces up to 50 kg. Open product	AL-Q Open product
VLO 60 Compact desktop laser device for manual welding. Open product	ALO If you need to weld long or bulky parts quickly, manually and flexibly, if you are looking for a simple load and want to work in the shielded laser safety area, then the ALO is the ideal device. Open product	AL-SWS Interesting and flexible system for the production of sensors. Open product