Disadvantages Of Bending Machines

In spite of great advances in manufacturing processes and a number of developments in technology over the decades, most of the tube and pipe production methods produce tubes that are neither round nor straight. In order to reduce ovality and increase straightness, rotary straightening machines were developed.

The machines that are used for straightening are built with several methods of driving the rolls. While some machines have discrete drive motor for every roll, majority of current machines use two drive motors - one for the top set of rolls and other one for the bottom set. Irrespective of the way in which the rolls are driven, it is essential that all the rolls revolve at equal speed from about 1 rpm to 2 rpm. Additionally, it is necessary for the manufacturer to build an electronic load sharing system to make sure the power required to straighten is

Advantages of Additional Bending Moments:
Following are the advantages of additional bending moments:

• With additional bending moments, the operator can apply a big bending moment at the first pair of deflecting rolls and lessen the linear moment. In this case, the final pair of rolls provide a finishing action.
• Because of the larger number of plastic cyclic deflections helps to straighten the badly bent tubes.
• They deliver more optimal straightening of the leading as well as the trailing end of the tube.
• Materials, such as copper tube, can be so efficiently straightened that no traces of residues are left behind. Subsequent annealing does not change the tube's straightness.
• Last, but most importantly, they achieve lower straightness and ovality tolerances despite any increase in work hardening.

Now that you have the basic understanding about straightening method, let us move forward to how is straightening done using Woodward-Fab’s tube straightnere