Patent ID: 9486851
Filing Date: 2016-11-08
CPC Classification: B21D

Claim Text:
1. A ram bending apparatus for bending tube material, the apparatus comprising: a punch and a set of rolls for three-point bending a tube material, wherein the punch has a groove, the punch groove having a width equal to at least a width of the tube material outer circumference, the set of rolls is supported by a frame, the set of rolls is between the punch and the frame, the set of rolls is configured to be in contact with the punch and the frame and configured to slide on the frame away from each other while contacting the punch when the tube material is in contact with the rolls and the punch, wherein each said roll has at its center part a groove having a width equal to at least a width of the tube material outer circumference, and the frame has a hollow part sufficiently wide to permit the punch and the tube material to freely move within the hollow part during bending of the tube material, and wherein the punch is in contact with the set of rolls from start to finish of the ram bending.