The reason why the coil material will warp during laser processing after uncoiling is due to the uneven stress distribution inside the material. In the manufacturing process of coils, in order to make the coils more compact, a certain tensile force is usually applied inside the material, which can make the coils more compact, reduce the volume of the coils, and save storage and transportation space.
However, when the coil material is uncoiled, the stress distribution inside the material will be changed. During laser processing, the laser beam heats and melts the material to form the desired shape. Due to the different heating and cooling rates in different parts, thermal expansion and contraction occur in these parts, resulting in changes in the stress distribution inside the material.
When the stress distribution inside the material is uneven, warping will occur. This is because when one side of the material is subjected to tensile force, the other side will be subjected to compressive force. If the tensile and compressive forces are not balanced, it can cause the material to bend or warp.
Therefore, in order to avoid warping during laser processing after uncoiling the coil material, it is necessary to control the stress distribution inside the material as much as possible during the material manufacturing process. One method is to change the stress distribution of the material by heating and cooling, thereby reducing the internal stress of the material. Another method is to perform certain pre-treatment before uncoiling the coil material, such as applying a layer of paint on the surface of the material or using special surface treatment techniques to reduce the stress distribution inside the material.
In summary, the reason why the coil material will warp during laser processing after uncoiling is due to the uneven stress distribution inside the material. In order to avoid this situation, it is necessary to control the stress distribution inside the material as much as possible during the material manufacturing process, and perform certain pre-treatment before uncoiling the coil.
