Roller Hemming
   Li Zhang

AVI Description
Courtesy Size
301a Roller Hemming Li Zhang 2.99MB
Roller hemming along a straight flange - pre-roller  flanges the upstanding flange at an 45 degree angle and final roller completes the hemming process. Flange blank is held by deformable inner part at the top and rigid part (anvil) at the bottom.  Breakdown  wrinkles are visible.
301 Roller Hemming Li Zhang 5.4MB
Mean stress contour animation of the same flange in roller hemming process viewed from another angle. Compressive stresses develop during movement of the pre-roller and followed by tensile stresses developed during movement of the final roller