In laser cutting, laser perforation is a crucial initial step. To achieve efficient and reliable laser perforation, consider these key recommendations:
Peak Power: Utilize the highest possible peak power. Higher power enables faster initial penetration of the material, significantly boosting laser perforation speed. This is critical for minimizing cycle time.
Focus Position: While ensuring the laser beam doesn’t hit the nozzle, slightly lower the focus position during laser perforation. This increases the energy density on the material surface, accelerating the melting or vaporization process. Proper focus is fundamental to successful laser perforation.
Oxygen Pressure: When using oxygen as an assist gas for laser perforation, the perforation gas pressure should match the subsequent cutting gas pressure. This simplifies the process and reduces the need for parameter adjustments. Consistent gas pressure contributes to stable laser perforation.
Multi-Stage Perforation with Assist Gas Purge: Employ a multi-stage laser perforation strategy, incorporating a brief pause with the laser off and the assist gas flowing between each stage. This helps clear molten material and debris, effectively preventing “blow-through” or “explosions” during laser perforation, improving stability and quality. This technique is especially useful for thicker materials. Optimizing laser perforation is key to maximizing your laser cutting efficiency.