In the field of metal processing, laser cutting technology is popular for its high precision and high efficiency. However, the problem of warping steel plates after laser cutting often troubles manufacturers and material suppliers. This article will explore the causes of this problem and provide corresponding solutions.
1. Laser cutting and internal stress
Laser cutting is a thermal cutting technology that uses a high-energy laser beam to melt or vaporize the material to achieve cutting. In this process, the original internal stress of the material will be released, and new internal stress will be formed. Warping is usually the result of the combined action of these two internal stresses.
2. Causes of steel plate warping
- Material internal stress: The steel plate may have generated internal stress during production, transportation, or storage.
- Process problems: During laser cutting, local overheating or improper cutting curve design can also cause warping.
3. Methods for judging the cause of steel plate warping
In order to determine whether the warping of the steel plate is caused by material or process problems, it can be judged by the flip test method.
Turn the steel plate over and perform laser cutting again:
If the direction of the warping changes, it means that the warping turns over as the steel plate turns over, which is a problem of internal stress in the material;
If the direction remains unchanged, it means that no matter how the steel plate changes, the warping remains in the same direction due to the influence of the process, which may be a problem with the laser cutting process. This is the simplest and most efficient judgment method in actual operation.
4. Solution
- Internal stress of the material: Use a steel plate straightener to relieve stress. The more rollers, the smaller the roller diameter, and the deeper the pressure of the steel plate straightener, the better the stress relief effect.
- Process problem: Adjust the laser cutting process, such as using segmented cutting, cutting one side first, and then continuing to cut after the other side cools down to reduce local overheating.
5. Advanced stress relief equipment
In addition to steel plate straighteners, there are more professional stress relief equipment, such as low rolling force levelers or tension levelers (for example, hot-rolled flat plates usually have better flatness).
6. Balance quality and efficiency
In actual production, it is necessary to find a balance between cutting quality and efficiency. Although adjusting the process may reduce cutting efficiency, it can significantly improve product quality.
7. Conclusion
Although the problem of steel plate warping after laser cutting is tricky, it can be effectively solved with the right methods and equipment. Manufacturers need to choose appropriate stress relief technology and process adjustment strategies according to specific circumstances to ensure product quality and production efficiency.
Post time: Apr-10-2025