Products

Tube bending tools from the experts

Tube bending tools made of aluminum bronze, tool steel or plastic

Tube bending is a key manufacturing process in numerous branches of industry, including the automotive and Plant engineering, medical technology, musical instrument manufacturing and the furniture and construction industries. They all require high dimensional accuracy, reproducible quality and perfect surface and cross-section geometry. High-performance pipe bending tools are essential for this.

ALBROMET offers a comprehensive range of high-quality bending tools for all applications. All tools, whether mandrels, crease smoothers (scrapers),

Bending dies or rollers as well as pressure and clamping dies are produced in-house. With modern design tools, collision checks in the CAD system and our many years of experience, we ensure that you receive the tools that are perfectly matched to your bending task.

Rohrbiegewerkzeuge Metallhandel CNC Albromet 030

Rohrbiegewerkzeuge Metallhandel CNC Albromet 032

Rohrbiegewerkzeuge Metallhandel CNC Albromet 039

Rohrbiegewerkzeuge Metallhandel CNC Albromet 038

Rohrbiegewerkzeuge Metallhandel CNC Albromet 036

Rohrbiegewerkzeuge Metallhandel CNC Albromet 035

That speaks for our tube bending tools:

Tube bending with continuously high bending quality
Advice, design and production from a single source
Tools for (almost) all pipe materials
Long service life thanks to optimized material selection
Quick availability in many dimensions

Product overview

Bending mandrels

For pipes made of aluminum, steel, stainless steel, copper,
Brass, titanium and coated metals
Link mandrels, also known as segment mandrels, stub mandrels or spoon mandrels, etc. in many different shapes and sizes
Made of aluminum bronze or tool steel with or without coating

Wrinkle smoother (scraper)

Effectively prevent creasing on the inner radius of the pipe
Suitable for aluminum bronze, tool steel or plastic pipe material
Various designs, e.g. as a monoblock or insert (pleated smoothing tray)
Matching pleat straightener holders available

Bending dies & Co

Bending formliners, bending rollers, clamping formliners and counterholders
Manufactured from hardened tool steel according to customer drawing
All components from a single source

Our spare parts sets are helpful when servicing is required. Whether connecting links, mandrel connections or bending balls, all components of a bending mandrel can be replaced quickly if required. This helps to minimize search times, incorrect orders or assembly errors. Sustainable and cost-saving.

Spare parts sets from stock:

Materials and coating

You can bend any pipe with us

ALBROMET bending mandrels – developed for exact radii and the best bending results. Our many years of experience are your guarantee for optimum tool design and dimensioning. Material and geometry-dependent influencing variables such as pipe material, wall thickness, bending radius and pipe diameter, to name just the most important, are decisive.

Each pipe material has its own character. Steel and stainless steel require high mandrel strength, aluminum requires low-friction surfaces. Sensitive process control is crucial for copper, while titanium requires uncompromising tool quality. Plastics, on the other hand, have very specific requirements in terms of temperature control and mandrel material.

Every pipe material has special requirements:

Stainless steel (1.4301 / 1.4404): high work hardening > stable mandrel support required
Available for all sizes Aluminum (e.g. EN AW-6060): low strength, but sensitive surface > polished or coated link pins recommended
Copper pipes Ø early mandrel contact is decisive
Titanium (Grade 2 / 5): high springback > exact mandrel position and stiff segment chain required

Material recommendations for bending mandrels

Types of bending mandrels

Standard articulated mandrel (segmented mandrel)

Combines mobility with dimensional stability
Reset by spring force of the links
Homogeneous support due to cylindrical segments

Articulated mandrel in sd design (small distance)

Ball distance reduced by 40
Larger contact surface for bending
Crease-free bending for thin-walled pipes

Articulated mandrel in xsd design (extra small distance)

Ball distance reduced by 80
For extremely thin-walled pipes
For high-strength pipe materials

Plug mandrel

For pipes with thick walls or large diameters
Ratio D/W < 20, ratio CLR/D > 3.0
Available in various versions

Spoon mandrel

3D-milled contour in the bending area with large contact surface for perfect bending results
For pipes with thick walls or large diameters
Ratio D/W < 20, ratio CLR/D > 3.0

The optimum lubrication

Lubrication is a decisive factor for high-quality bends with mandrels in rotary tension bending. Depending on the pipe material, oil, grease or paste is used to reduce friction between the pipe, mandrel and tool.

Correctly dosed lubrication on the mandrel and on the inside of the tube prevents surface damage, scoring and increased tool wear. A uniform material flow in the pipe ensures high bending quality.

Lubrication variants using the example of a standard link arbor:

Lubrication on the outside of the mandrel

Simple implementation
Suitable for all lubricants (oil, grease, paste)

Internal lubrication

Suitable for automatic bending machines
Enables stable and reproducible bending processes
For low-viscosity bending gels or synthetic lubricants

Minimum quantity lubrication (MQL)

Low lubricant consumption
Lubricant leakage close to the bending area
Better lubricant distribution through compressed air feed of the fluid

Example fixed mandrel (stub mandrel)

Internal lubrication (internal mandrel lubrication) is also available for fixed mandrels such as stub mandrels and bucket mandrels

Link arbors: design and installation position

As a manufacturer of tube bending tools, we place the highest value on function and design. The bending process is simulated using CAD and the link mandrels are checked for function and collision. The size of the bending mandrel is defined by the outer diameter of the pipe.

Dimensions - Standard arbors

Wrinkle smoothers and wrinkle smoothing trays

The crease smoother (scraper) supports the pipe on the inside of the bend during bending and thus helps to maintain the shape and integrity of the pipe. It also minimizes the springback of the pipe. The shape of the pleat straightener must be adapted to the desired pipe shape in order to effectively prevent the pipe from deforming or buckling.

Various construction forms:

Pleat smoothers are particularly important when bending pipes with tight radii and/or thin walls. Various designs are available. The material is selected to match the pipe material. ALBROMET offers all the materials and coatings mentioned.

Material selection for pleat smoothers:

Spare part sets and individual parts

Spare parts sets offer significant advantages when servicing is required. All the required components are already fully assembled and pre-assembled, eliminating search times, incorrect orders and assembly errors. This significantly reduces the amount of work required on site and shortens machine downtimes. At the same time, the standardized composition ensures consistent quality and increases process reliability during maintenance and servicing.

Spare parts sets

Bending balls

The high-precision connecting links between the mandrel shaft and balls are made of heat-treated tool steel in premium quality with extremely high strength. This increases the service life and reduces maintenance costs during use. We offer short delivery times and the best price-performance ratio thanks to our own production and warehousing.