Many metal structures and objects start as simple flat, rectangular pieces, they will bend in a wide variety of metals in various ways(angles, bars, beams, channels, tees, pipes, and tubes, are all part of metal bending. It is also the case that aluminum extrusions, even extremely complex sections of aluminum, can be rolled and formed into a ring). Metal fabricators perform sheet metal forming and bending with an angle roll to create fences, angle braces, door frames, brackets, rods, and metal tubes of various sizes.
Efficiency
Angle rolls(aka profile bending machines) are efficient because they are cold bending equipment, which means it works below room temperature， they work without heating metal. So it saves the cost of the energy it would take to heat metal to make it malleable.
The angle rolls(section bending machines) feed room temperature metal from a metal profile past a series of rolls positioned to guide, pinch, and press the metal, bending it into the desired shape. The metal bends a little more as it passes each roll in the series until the machine achieves the desired shape of the metal.
Flexibility
BIT PBH angle roll machines and PBA aluminum bending machines are adjustable and able to accommodate jobs that require a variety of bends at different angles. Some can produce multi-radius or 3D bends. Workpieces can pass through the machine multiple times to achieve the desired shape.
The PBH angle rolls use a changeable combination mold, only one set of molds can be used to bend all metals on the market except round profiles, and no additional investment is required.
PBA series angle rollers use polymer rolls to protect the surface of aluminum materials. During the bending process, carbon steel and stainless steel profiles can be bent by replacing metal rolls.
Functions of PBA CNC angle rolls
- The profile is bent and formed at one time;
- Bendable shapes: C shape, U shape, 3R shape, multi-segment arc program (two-dimensional variable curvature), etc.
- Automatic calculation function of the rebound amount of the profile (the bending radius of the first profile is inaccurate, and the second profile can be bent accurately according to the calculation result)
- Auxiliary calculation: knowing the chord length and chord height, the radius and arc length can be obtained
- Self-diagnosis function: equipment failure can judge the quality of components
- Manual adjustment function: inaccurate size arc can be corrected by manual function
- The interface has the ability to switch between Chinese and English, and provide prompts and alarm information;
Precision
Like most modern metal fabrication machinery, angle roll forming machines incorporate computerized controls. This allows fabricators to achieve a high level of precision in accordance with specifications for metal parts.
Repeatability and accuracy: The first bend of the day is the same as the bend on the night shift. Servo electric gives you this every time.
Accurately controlled ‘Z’-axis: When forming non-symmetrical sections, able to control the twist of the section accurately.
Variable centers: To get the most from a machine you should be able to get the widest capacity.
Simple: An operator should be able to learn to bend complicated bends in a single day. Bends with tangents, and multi-radius bends all should be formed easily and smoothly.
Capacity
Large-scale angle rolls can shape long pieces of metal profile that would otherwise require multiple press brakes working together.
The range of standard design BIT PBH universal Section Bending Machines covers a bending capacity from 6 to 1700 cm3 section modulus for all commercially available section types like U-Channel, I/H beam, Steel Tee, Angle iron, flat and round sections as well as tubes. Additionally, a big variety of special sections can be processed by this machine type.
Note
It’s important to consider the types of metals the machine will bend when selecting an angle roll machine. PBA angle bending machines work with softer materials like aluminum and copper, while PBH angle rolls are made to cope with steel and iron.