Laser rounding

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The laser rounding manufacturing process is used to round off sharp-edged shaft shoulders, tool and sheet metal edges. According to DIN 8580, the production process laser rounding is to be assigned to main group 1.1: Primary forms from a liquid state .

Process description

With the help of bundled laser radiation in pulse (pm) or continuous wave operation (cw), a corresponding power density is generated on the edge to be rounded, whereby the sharp edge is melted and a definable amount of metal melt is generated. The generated metal melt solidifies again under the uniform and constant atmospheric pressure of the protective gas atmosphere , which creates a uniform rounding of the edge. The surface quality of the laser rounding can be optimized by the protective gases used and corresponds to an elaborately polished surface. By moving the laser beam along the edge contour to be rounded under a protective gas atmosphere, the edge is melted by the laser beam, the further movement of the laser beam leads to the solidification of the melted edge, under a protective gas atmosphere to a rounded edge shape.

With laser rounding, a sharp or burr edge made of metal is melted by means of laser radiation in a protective gas atmosphere and also solidified again in a protective gas atmosphere. The rounding created by the melting process can be used on all metal materials. Due to the small heat-affected zone of the laser rounding process, the surrounding material is only slightly exposed to heat, which means that deformation of the sheet can be avoided in the case of thin sheets.

With the help of galvo scanner units, any 2D contours can be processed at processing speeds of up to 1 m / s. Here, the laser beam is moved via rotatable laser mirrors operated by galvanometer motors and focused via an F-Theta lens (plane field lens) in a certain working area (depending on the selected F-Theta lens).

Robot technology or 5-axis CNC systems are used for the laser rounding of 3D contours .

Web links and sources

• Hüyüktepe engineering office, Helios Laser-Service http://www.helios-laser.de
• Siebers, Franz-Josef (78655, Dunningen, DE) http://www.google.com.ar/patents/DE102013100706A1?cl=de
• Hugo Kern and Liebers GmbH & Co. KG, 78713 (DE) http://www.freepatentsonline.com/DE102013100706A1.html