ALOtec Dresden GmbH

Ihr Technologiepartner für die Lasermaterialbearbeitung

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ALOtec Dresden - Technologie laser hardening, laser cladding, laser beam analysis

Technology - Laser Hardening

The surface hardening with high power diode laser (short laser hardening and laser-beam hardening) is increasingly used in industrial manufacturing and toolmaking.

The laser hardening is a process in which the energy input takes place by means of radiation directly to the component surface. The laser beam heats short term and localized the top portion of the workpiece up to the austenitizing temperature of the material used. This leads to a homogenization of the carbon distribution and thus to a spread of a front of austenitization in the material.

Depending on the material used, the austenitizing temperature is about 900 ° C to 1400 ° C and time to temperature at about 3 s to 10 s.

Laserstrahlhärten einer Kurvenbahn aus GGG60

Technology - laser cladding

will follow...

Technology - Laser wire welding

  • wire feeder mounted on the laser optic
  • usable for wire with 0.25 until to 0.5 mm diameter
  • integrated in the  robot control
  • applicable for single and serial production
Laserschweißen mit Draht


Laser Power Control

Screenshot der Regelsoftware LompocPro während eines Regelprozesses

The laser power control consists of the temperature measuring system "E-MAqS" and the control software "LompocPro". This combination results in an uniform hardness track in face of permanently changing geometry of the part. Melted edges and drilling holes will be avoided.

For a short time it is possible to control laser cladding processes.

Offlineprogrammiersystem am Beispiel der Laserhärtung eines Werkzeugs


DCAM 2013 is a standard CAD/CAM software,
that was extended with modules for generating robot programs.

  • simple generation of robot programs without programming knowledge
  • robot program is nearly ready before part is delivered (if the 3d data was sent before)

Scanning System

Different track widths created with the scanning system.
Fix optics have their limitations when hardening big molds or tools, especally if you need different track width or if you have continously getting wider tracks.
By using the scanning system "LASSY", developed by the Fraunhofer IWS, it is possible to change the laser width and energy distribution during the process without changing the optics.

Laserhardening - example: cutting tool

Following example shows our mobile laser hardening machine during hardening of a cutting tool.
The challenging geometrical changes (concave and convex) are beeing controlled by our laserpower control to guaranty a nearly constant surface temperature.
Heat accumulations caused by holes in the tool are also avoided.
  Technologie Laserhaerten Musterbeispiel Werkzeug Schnittwerkzeug Schneidwerkzeug

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laserhardening - tool making

laserhardening - mold making

laserhardening - machine buildiung