Influence of Local High Spot on Additional Local Waviness of Uncoiled Strip

To solve additional local waviness of uncoiled strip caused by local high spot, the destabilization waviness model was established, and the critical destabilization value of additional local waviness was deduced based on strip energy theory and local high spot layers stress model. The influence of local high spot on additional local waviness of uncoiled strip was quantitatively analysed by numerical simulation. The reliability of mathematical model was proved by simulation calculation and production experiment, which provided the important guide basis for solving additional local waviness of uncoiled strip in production and bring enormously economic benefits for corporations. The research results show that with local high spot value increase, critical compression stress value of destabilization waviness will be reduced, and the defect grade of additional local waviness is more serious, and waviness of uncoiled strip is more likely to occur.