Research On Vibration Characteristics And Finite Element Of Roll Tensioning For Cemented Carbide Circular Saw Blade

Cemented carbide circular saw blade is one of the most commonly used cutting tool in wood sawing processing, the cutting speed is up to70~100m/s, due to the proportion of thickness in diameter is very big for circular saw blade, and wood processing materials is very complex, so the vibration is inevitable. Therefore the stiffness or stability for circular saw blade must be higher, then the vibration can be reduced, and the blade’s life and product quality may be improved.The present study indicated that the introduction of the ideal prestress or tensioning is one of most effective method to increase the dynamic stability. And roll tensioning which is as a simple, reliable and economical method can effectively increase the stiffness of the circular saw blades and reduce the circular saw blades of amplitude. For this reason, roll tensioning is getting more and more attention.This paper study roll tensioning of cemented carbide circular saw blade, an NC sawing experimental platform was built. The experiment and finite element analysis were employed in research the influence of roll tensioning. First, the vibration modal test was carried out after roll tensioning for circular saw blade. The experiment results show that vibration modal is a reliable and effective method which estimates status of roll tensioning. The nature frequency is increased when circular saw blade was rolled, and the stiffness is increased. Then the influence of rolling parameters on modal frequency was analyzed, the results show that increasing rolling pressure and times, and reducing rolling radius can increased the modal nature frequency, the vibration stability is improved too.A complete finite element model of rolling processing process was built in ABAQUS software, then the simulation analysis was carried out. The research results indicate that finite element technique is an effective means of study for roll tensioning, it can easily get the results of stress and strain, and the simulation results is agreement with the experimental results. However, research find that roll tensioning is a local processing technology for circular saw blade, and the elastic-plastic deformation is limited, it can’t infinitely improve the stiffness of the circular saw blades.