Laser processing is widely used across many industries. The process typically relies on nesting software to arrange parts for production. Proper nesting is crucial; poor layout can lead to wasted time and materials, thereby reducing efficiency. When nesting for laser cutting machines, the following six points should be considered:
Corner Melting
Deceleration is often applied when cutting corners to maintain high cutting speeds while navigating tight radii. This prevents the steel plate from melting due to prolonged exposure at the corner, ensuring high cut quality, reducing processing time, and boosting productivity.
Part Spacing
When cutting thick plates, sufficient spacing between parts is essential. Inadequate spacing can lead to edge burning-particularly when cutting sharp corners or small geometries-which compromises cut quality.
Lead-in/Lead-out Settings
When cutting thick materials, transition lines (lead-ins and lead-outs) are typically added at the start and end of the cut to ensure a smooth seam and prevent burn marks at the entry and exit points. Since these lines are not part of the final workpiece, they must be positioned outside the part's boundary. Care should be taken to avoid placing them at sharp corners or areas with poor heat dissipation. Ideally, the connection between the lead-in and the cut path should use an arc transition to ensure smooth machine movement and prevent burns caused by pauses at corners.
Common-Line Cutting
Parts can be arranged so that they share cutting lines (common-line cutting), effectively combining two or more parts into a single unit. This technique is particularly beneficial for large batches of regular shapes, as it significantly reduces cutting time and saves raw materials.
Part Collisions
To maximize efficiency, many laser cutting systems operate continuously (24/7) using automated, unmanned loading and unloading mechanisms. Collisions with parts that have tipped over after cutting can damage the cutting head and halt production, resulting in significant losses. To mitigate this risk, consider the following:
Select appropriate cutting paths that navigate around already-cut parts to minimize collisions.
Optimize the cutting route to reduce processing time.
Use micro-joints to connect multiple small parts; these joints hold the parts in place during cutting but allow for easy separation during unloading. Scrap Handling
After parts have been cut, the skeleton-like scrap remaining on the laser cutting machine's worktable must be removed promptly to facilitate subsequent cutting operations. For laser cutting systems lacking automatic unloading mechanisms, the scrap skeleton can be cut into smaller pieces for quick removal, thereby preventing operator injuries caused by handling heavy scrap with sharp edges.