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Laser welding / laser marking

Industrial laser welding/engraving/marking calls for state-of-the-art infrastructure, qualified specialized personnel and professional interdisciplinary competence: experience with materials technology, metal and plastics processing and finishing. Professional expertise in the use of laser technology and program management, which is often a deciding factor for perfect quality, is a given.

This allows us to perform nearly every task with top-quality efficient industrial processing and offer you laser-technology solutions in a highly efficient and environmentally-friendly manner.

The use of laser beams offers various possibilities for joining metals. They can connect workpieces on the surface or create deep weld seams. They can be combined with conventional welding techniques and can also be soldered. Laser beams also allow materials to be welded at high melting temperatures and at high thermal conductivity. Owing to the low molten mass and the short, controllable melting period, they can even connect materials that otherwise cannot be welded. If required, filler metals are used.

Even during seam welding with continuous wave lasers, the heat-affected zone and the total increase in heat of the component is still several magnitudes less than for arc welding or plasma arc welding. The addition of energy can be easily monitored, regulated and kept constant or fine-tuned.

Characteristics of laser wielding

  • Contactless machining
  • Minimal impact on the material
  • Low heat impact, therefore little or no material distortion
  • Usually no post-machining of the welded area required
  • Precisely reproducible geometry of the weld zone
  • Welding parameters that can be precisely adhered to, which enhances the manufacturing quality
  • Laser beams are a type of energy that can be used for both cutting and for welding.

The huge advantages of laser welding

  • Low thermal impact due to short processing time
  • Low distortion, which requires less post-machining
  • Optimized manufacturing costs
  • No wear and tear on tools and in turn, high repeating accuracy
  • Laser welding is performed on 3D laser-cutting systems and can be performed with and without filler metals. Our technique does not require filler metals. The components are connected without gaps.
  • This requires precisely preprocessed workpieces, a clamping set-up and a specially created CNC program. We would be happy to design the best laser-welding solution for you. Test us out!

Laser-beam welding is a melting technique. The tightly bundled laser beam serves as a heat source during machining. Optics are used to focus the laser beam, which permits welding with targeted heat input. During laser welding with a pulsed Nd:YAG solid-state laser, the focused laser beam is directed toward the workpiece in short pulses. With a microscope and cross hairs, the workpiece can be precisely positioned.

In the machining parameters, various settings are used for the focus diameter, pulse power, pulse duration and pulse frequency depending on the material. In addition, a filler metal (wire) is placed on the welding site.

The welding pulses cause the wire and the workpiece beneath it to melt and connect with each other. Since the workpiece is processed under a microscope, it is possible to weld even the finest edges and surfaces.

YAG laser

The smaller focus of the YAG laser compared to the CO2 laser makes it particularly well-suited for precise fabrication of microscopic structures. Furthermore, metallic materials absorb the YAG radiation much better. The heat created by the laser beam also penetrates the material across the small focus area to only a limited extent and thus apart from a small heat-impacted area, does not disturb its structural arrangement. For precision work, YAG lasers predominate. They also offer the advantage that their radiation can be easily modified in terms of space, time and intensity. They can thus be adapted to the various methods of materials processing and to the various materials themselves.