CNC Tubing Bender

Bending tubes with cnc tube bender machine has improved greatly bending quality of tubes and brought great help in industrial production. Here, as cnc tubing bender manufacturer, we share some experience of improving the quality of tubes in bending process. Hope our sharing can help you solve problems that you meet in using the cnc tubing bender for sale.

1）Phenomenon:

     When bending a tube with a  thin wall, the tube wall is wrinkled. Thin wall here is not only means  that the wall of the tube is thin 0.8mm, 0.5mm but also that the wall is relatively thin  relative to the outside diameter of the tube ( diameter of the tube 168mm and thickness of tube 4mm). The phenomenon of inner wall wrinkling also occurs when the bending radius is very small, bending square tubes and rectangular tube etc.

Solution: 1. Increase the bending radius

                2. If can not increase the bending radius, use anti-crease die and mandrel to prevent inner  wall wrinkling.

2）Phenomenon：

          When we do bending with small bending radius and with square tubes the bend part is seriously deformed.

 Solution:    1. Use mandrel in the bending process.

                    2. Increase clamping force to prevent the tube from sliding during the bending process.

                    3. Increase the side auxiliary force to reduce the out-of-roundness of the bend.

3）Phenomenon:

          When we do bending work with small bending radius, the outer wall of the tube get thinning.       

          Solution: 1.Increase the bending radius to slow down the rate of material deformation in per unit  angle.

                          2. Improve mandrel slickness to reduce friction with the inner wall of the outer part ot the bend.

                          3. Increase lubrication by using good bend stretching oil and reduce friction between the tube and mandrel.

                          4. Increase side auxiliary force.

                          5. Appropriately reduce the bending speed.