Forming where a tube is squeezed and rotated using a rotary bending die. Beskrivning The process A: The workpiece, in this case a pipe held by clamps [1] to a rotary bending die [2]. Just behind the clamp enclosing the tube is a sliding pressure die [3] and a stationary wiper [4]. B: When bending the pipe is rotated along with the rotary bending die around its outline, while the follower works as a support for the forces that occur when the pipe undergoes plastic deformation. An articulated bending core [5] prevents cross section deformation. It is not to the pipe movement but is held at its position attached to a rod through the tube aft end. Draw bending of tubes Process films Advantages and disadvantages In comparison with alternative methods Perfectly contoured products No scratches or damage to the material surface Minimal deformation of the cross section smaller wall thicknesses required expensive tools
