Employing a mandrel when pipe bending is a common solution for several tube bending issues and problems. So, what do you need to know about mandrels?

 

When using a mandrel for pipe bending, the tube is pulled over the mandrel, which is held in a fixed position. A plug mandrel is recommended for tubing 3/8' in diameter and smaller.

However, when the radius of the bend is smaller and/, or the wall is thinner, it becomes necessary to use a ball mandrel and wiper die to maintain the proper shape.

In addition to using a mandrel setup, a wiper die is necessary with tight bends or thin wall tubing. This is because bending issues become enlarged with these types of bends. With tight bends or thin wall tubing, retaining the material during compression is difficult.

The pressure during this type of bend is so intense the material is squeezed back past the tangent and buckles without the aid of a wiper die.

interlock_style_tooling.pngHave questions about mandrel bending? Get your free Intro to Tube Bending and learn about the importance of a mandrel to avoiding common bending issues!

Regardless of which type of mandrel setup is used, employing a mandrel is done to prevent some of the most common tube bending problems or issues.

Perhaps most importantly, a mandrel will help prevent spring back. Spring back is the tendency of a metal to return to its original shape. Mandrels also help prevent flattening, wrinkles, and kinks.

Learn More

Click here or follow the link below to download a free introduction to tube bending to learn more, or contact us at any time with any questions or comments you may have.

If you are interested in pipe bending mandrel basics, you may be interested in these articles:

We are ready to help! Contact Us.

Related Articles
Tube Bending Process

Tube Bending Process

The tube bending process, with or without a mandrel, requires precise measurements and alignment to...
Read More
Mandrel Tubing Bender

Mandrel Tubing Bender

Mandrels prevent flattening, wrinkles, and kinks when bending tubing which is why mandrel tubing...
Read More
Tube Forming Bend Dies Explained

Tube Forming Bend Dies Explained

When a tube is bent, two things happen to metal. The outside wall is reduced in thickness due to...
Read More
Using a Mandrel Tubing Bender

Using a Mandrel Tubing Bender

Using a mandrel when bending tubing is a common solution for many bending issues. For instance,...
Read More