Mechanical behaviors of guide roller in web transfer system

To improve the accuracy and stability of the web transfer, a multi-body combined finite element model is established according to the structural features of the guide roller. The guide roller bending deformation, the vibration modes, the harmonic response, and the deformation under unbalanced excitation are analyzed, and the experimental test of the static flexural deformation is performed. Research results show that the structural parameters of the guide roller, such as the wall thickness, the roller length, and the gudgeon length, etc., are the main factors influencing the guide roller mechanical behaviors. Keeping the structural parameters of the guide roller and other process parameters generally used in the industry unchanged, the maximum deformation value of the guide roller caused by its own gravity, the web tension and the unbalanced mass is 52.725 μm. If the wall thickness of the guide roller is reduced to 3.5 mm from 4.5 mm, the maximum deformation of the guide roller is 58.108 μm while the critical speed is increased to 8 309.94 r/min from 8 255.10 r/min and the follow-up ratio is increased to 0.982 from 0.920, which is helpful to improve the accuracy and stability of web transfer.