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Bending and forming of aluminum extrusions

profile bending

Aluminum Profile Bending Machine

B-R200 CNC aluminum profile bending machine

Mainly for the bending of various small metal profiles. It can bend various shapes (C-shaped, U-shaped, square, polygonal and other shapes).

aluminum profile bending machine
B-70 CNC Profile Bending Machine

About B-70 CNC PROFILE BENDING MACHINE B-70 CNC ALUMINUM PROFILE BENDING MACHINE is suitable for the bending of various non-standard metal profiles in large-scale construction profiles, aerospace, tun…

Aluminum Profile Bending Machine

Performance and main application scope of CNC profile bending machine The hydraulic system of B-12-3 CNC aluminum profile bending machine adopts servo technology, the mechanical structure is reasonabl…

aluminum profile bending machine

bend various shapes of three-dimensional arcs, C-shaped, U-shaped, full circles, ellipses, multiple radius combinations, etc.

cnc aluminum profile bending machine
B-50 CNC Aluminum Profile Bending Machine

Working Principle of B-50-3 CNC Aluminum Profile Bending Machine B-50-3 cnc aluminum profile bending machine is mainly composed of 3 sets of roller shafts and 2 sets of profile rollers. The movement o…

3D cnc aluminum profile bending machine

Advantage of 3D 25T CNC aluminum profile bending machine Independent core operating system, unique core algorithm, big data processing, data graphics, digitization, seamless docking with office system…

aluminum profile bending machine

Application B-3D-13-3 CNC aluminum profile bending machine is widely used in the bending of various non-standard metal aluminum profiles in building doors, windows, curtain walls, decoration, automobi…


B-30-3 CNC ALUMINUM PROFILE BENDING MACHINE SPECIFICATION Power: 10KW Voltage: 380V 50HZ  Roller speed: 1-15 rpm Maximum diameter of mold: 360mm Roller diameter: 80mm Center distance of…

cnc aluminum profile bending machine
B13-4 CNC Aluminum profile bending machine

ALUMINUM SECTION BENDER The four sets of rollers of the B13-4 CNC Aluminum profile bending machine are controlled by the CNC numerical control device, move smoothly and can be precisely positioned and…

Special aluminum profile bending machine
B25-3 CNC Aluminum profile bending machine

B25-3CNC profile bending machine B25-3CNC profile bending machine is mainly used for the bending of special aluminium profiles, aluminum-plastic aluminum profiles, various special-shaped aluminum pro…

B15-8 CNC Profile Bending Machine
B15-8 CNC Profile Bending Machine

B15-8 CNC Profile Bending Machine working principle B15-8 CNC Profile Bending Machine is an 8-axis mechanical structure, using rollers that match the profile, and realizes the feeding function through…

CNC section bending machine
B-13-3 CNC profile bending machine

The B-13-3 CNC profile bending machine is suitable for processing different cross-section profiles. The B-13-3 CNC profile bending machine has 3 sets of rollers and photoelectric positioning;


Types of profile bending machines

We are here to disclose our sales profile bending machine and profile bending knowledges, so the customer is informed about such information.


It can bend copper, carbon steel, stainless steel and aluminum profiles.
Angle, channel, beam, flat bar, round & square bar,pipe,square tube.


CNC control. Accuracy is as high as ≤0.01mm. 
Suitable for bending of aluminum profiles for automobiles, doors and windows.


Small section bender, with manual and semi-hydraulic drives, can bend profiles other than beam.Cheap price, first choice for small factories


Under this subtitle, we provide the basic knowledge of various profile bending, and you can even select the machine through the parameters we provide.

Bending and forming of aluminum extrusions

Aluminum can be extruded and bent to specified tolerances or to standard dimensional tolerances. While a product’s dimensions and bend angles can be methodically measured and re-measured, the end product will only be as precise as the bending equipment or method used.

Several factors should be considered when choosing which bending process is appropriate for a certain product. Aluminum extrusion engineers can provide crucial input on the bending, shaping, and forming of aluminum during the design phase of a project. Deformation of the inside or outside radii can be a design issue and can also determine which forming process to use. Before beginning the design process consider these parameters:

  • What tolerances, or deviations, are expected on the inside radius, the outside dimension radius, and the overall length of the part?
  • What surface areas are critical for appearance?
  • What mechanical strength is required?

The product’s alloy, temper and cross-section also are important considerations. Once these factors are determined, aluminum extrusion manufacturers can begin the bending process using one of the following five common bending and forming methods.

 Ram or Push Bending

Ram or push bending, as the name implies, uses a ram to force the extruded metal piece on a bending die. A die pushes the extrusion onto the pressure dies, forcing the extrusion into your desired bent form. With programmable bend angles, this form of bending allows close proximity to multiple plane bends, though only one radius can be bent at a time. Ram bending offers inexpensive tooling and good bend precision with low per-bend cost.

Ram or Push Bending is ideal for components such as boat gunnels, portable structure supports, wheelchair frames and medical beds.

Hydraulic Rotary Draw Bending

In the hydraulic rotary draw bending process, manufacturers place extruded aluminum onto a bender and hold it in place with a stationary or sliding pressure die and clamping block. The round bending die, powered by hydraulics, is rotated up to 90 degrees, bending the extrusion as it rotates. With this method, an extrusion can only be bent one radius at a time.

Incorporating a mandrel or other tool component to grip the rotary die can prevent creasing or misshaping of the product, though its use isn’t required. The single axis-controlled revolution can bend within one-tenth of a degree for extremely precise bend angles.

Hydraulic bending is often used when forming round tubes or pipes for applications such as handrails, and is ideal for extrusions with a large diameter, such as building signage.

 Electric Rotary Draw Bending

Electric rotary draw bending uses the same process as the hydraulic method, but allows faster setup. The bends also are more accurate and easily repeated because angles and rotations can be automated in a machine’s programmable logic controller. Rotations of the extruded aluminum also can be mechanized for variable plane bends.

The electric rotary draw method is best for applications that require multiple bends per part in close proximity to each other, or different radii bends for each part.

Three-Roll Bending

Three-roll bending pushes an extrusion around three different rolls placed in a triangular shape. The rolls are adjusted to form a precise angle, up to a 360-degree rotation, that can roll horizontally or vertically. As the extrusion is slowly moved across the power-driven rollers, it begins to curve and bend.

profile bending machine
3-roll profile bending machine

Extrusions are limited to a single bend per cycle, meaning a higher angle of bend would take longer to reach the desired angle. Though it may take longer, the maximum bend radius is unlimited. Symmetrical profiles are preferable for roll bending.

Stretch Forming

During stretch forming, an extrusion is placed along a rounded, fixed bending die and clamped in place on each end. The machine begins to swing the clamped ends downward to angles up to 180 degrees, and the extrusion is bent around the die to reach the desired form.

The bend radius is unlimited with this method. A stretch forming machine can bend, twist and lift an extrusion simultaneously to create unique, specified shapes and angles for parts up to 25 feet long. This method also offers the most accurate and consistent bending through elongation control. Because of the way the rounded, fixed bending die pushes on the extrusion, stretch forming has the least amount of surface distortion and traffic marking on the extruded piece.

Stretch forming is commonly used for parts with a larger bend radius, as the minimum bend radius is generally two to three times greater than other forming/bending methods.

Each of these bending methods has various benefits. Designing for success and determining the best method ultimately comes down to an end product’s desired tolerance, appearance and strength. Input from aluminum extrusion manufacturing engineers during the design phase of a project can help OEM designers determine the best method for bending, shaping and forming an extruded product that will best bring designs to life.