Mandrel bending – Rotary draw bending with mandrel

Mandrel bending respectively rotary draw bending with mandrel is being deployed in diverse fields e.g. the furniture industry, vehicle manufacturing or engineering.

Typical are

  • tight radiuses of about 2-times the diameter (R=2xD neutral axis)
  • alternate bent straight
  • free orientation in space.

In mandrel bending the mandrel is inserted in the pipe/tube and fixed to the former die with a clamp die. In the next step the former die rotates with the clamp die downwards and the stock bends around the former die.
When wrinkles occur the mandrel is being supported by a wiper die. This is especially essential with thin walled material.

pricip of mandrel bending

The chosen mandrel should always be a counterpart to the stock. Only this way the materials can slide ideally past each other.

The particularity of mandrel bending

For each combination of diameter and radius a seperate tool is needed.

We can offer you combinations of Mandrel and Ring bending because of the variety of tools, that we also have at our disposal for 3-roller bending.

The common construction of pipelines consists of straight and bend parts that are welded together.

Because of the repeat accuracy of the bending technique we have at our disposal we can produce at lower cost. Problems that occur because of errors in the welding seam are excluded this way. You will receive a less expensive, more shapely and error free product that also has an additional value for your clients.

We will be pleased to make you a detailed offer.