Laser cutting edge distortion
Laser cutting edge distortion is the asymmetrical deformation of a workpiece due to uneven thermal input during laser cutting. This requires adjusted cutting strategies to minimize.
Physical-Chemical Mechanism of Action
Laser cutting edge distortion occurs because the laser applies uneven heat to the workpiece. The laser beam is stronger on one side and weaker on the other, leading to different material behavior. The material at the hot entry point heats up faster and expands, while the material on the cooler side is less affected. This causes asymmetric deformation of the cut edge.
Metallurgical Relevance & Welding Risks
Edge distortion can lead to uneven stresses in the workpiece, which may cause cracks or deformations. It also increases the difficulty of precision cutting and can affect the final product. Additionally, it can lead to uneven load distribution, reducing the workpiece's service life.
Workshop Practice & Action Guidelines
To minimize laser cutting edge distortion, the following measures should be taken:
• Use uniform laser power and control the cutting speed.
• Adjust the cutting strategy to the workpiece and material type. This can be achieved, for example, by adjusting the entry angle or the focal length.
• Use a suitable protective coating or shielding gas to regulate temperature distribution and protect the material.