Tools and products for bending and end forming tube and pipe

Comprehensive range of services in the development, design and manufacture of tools, including customer support and advice

Mandrels

Stabilisation mandrels are used as internal support for tube bending and their purpose is to mitigate defects such as flattening or crinkling of the inner radius of the bent tube.

In terms of the resultant bend, the choice of the correct mandrel is absolutely necessary. Indeed, the choice of the type mandrel and a possible number bends depends mainly on the outer diameter pipe (OD), wall thickness (WT) and bending radius (CLR), Another important factor for correct operation is the setting of the mandrel itself.

Simple plug

This type of mandrel is suitable for strong walled tubes bent around a large radius.

Simple formed plug

This is intended for similar applications as the simple plug, the shaped part of the mandrel provides better support for the tubes on the outer radius of the bend.

Standard mandrel

This is one of the most widely used mandrels and provides sufficient support for common bending parts.

Close pitch, thin wall mandrel

Is used in the bending of thin-wall tubes with smaller bend radii, the size of the coupling unit is one size smaller than in the a standard mandrel, the bearings are also close together and provide great support during the bend.

Ultra close pitch, Ultra thin wall mandrel

These are suitable for tube bending of very thin walls and very small radius bends, just like the thin-walled ball mandrel it has a smaller size of connected parts.

Links

Links are important parts of ball mandrels and have an important impact on the life of the mandrel, therefore it is very important to always use the correct mandrel and to have the mandrel correctly set up.

The closer arrangement of the beads in the case of the thin-walled and ultra thin-walled mandrel is at the expense of the firmness of the links!!!!
In terms of functionality of the mandrel it is very important to have it set up correctly and to use suitable materials for the tube, more here: (LINK: Tube bending guide).