Tube bending machine for sale

The standard dies of 3inch steel tube bending machine sb 75nc include bending die, pressure die, clamping die, mandrel and wiper die (sometimes it’s not necessary the use of wiper die).

D(Tube outer diameter),t(Tube wall thickness),R(Bending radius)
The easy and hard process of the tubes depends on the tube outer diameter and tube wall thickness. The smaller the wall thickness and bending radius of the pipe, the process will be more difficult. So, we select relative wall thickness, and relative bending radius as bending parameters.
Relative wall thickness: tx=t/D
Relative bending radius: Rx=R/D
If the Rx>3D and tx>0.04, we can choose the standard dies. If the Rx< 3D, tx< 0.04D, the round tube bending machine needs to add the mandrel and wiper die to ensure the bending effects.
3inch steel tube bending machine sb-75nc adopts the winding bending. The principle is rotating the bending die to bending tubes and it can add mandrel and wiper die to improve the bending effects. So, the bending effect is good.

3 roller tube bending machine adopts the roll bending. The principle is to bend the profile through a rolling bending die. This process has a limit for tube sizes. It is suitable for small-diameter pipe fittings and relatively high material requirements.

The top bending process has limitations on the tube material specifications and pipe length, and the bending parameters, such as bending angles, bending radius, and rotation angle, cannot be changed. Therefore, this bending process has the advantages of high stability and efficiency, making it suitable for the mass production of small-diameter tubes. However, if adjustments to the product structure are needed, the transfluid tube bending machine cannot be used. The top bending process has a high requirement for product development maturity.

With the development of the CNC machine tool industry, the advanced tube bending CNC machine can improve production effectiveness, bending quality, and bending accuracy. But it should be noted that stainless steel tube bending machine is more sensitive to process parameters, so adequate preliminary preparation and trial production work is very important. For stainless steel with a thin wall, if the bending parameters are not right, resulting in wrinkles or damage. So, Yansumi Machinery provides the following solutions according to years of production experience.
1. Accurately install the bending die, pressure die, clamping die, mandrel and wiper die, then input the bending angles.
2. The clamping die fixes the tubes, the tube and rotates with the bending die to finish the bending process, it can improve the bending accuracy.
3. If the die is not properly installed, it is prone to wrinkling, resulting in the scrapping of the tubes.
4. The mandrel position is very important. If the wrinkling is at the anterior tangent point, the position of the mandrel should be adjusted forward to support the tubes. If the wrinkling is at the back tangent point, the wiper die should be installed.