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What Is Cold Roll Forming Machine

Views: 4264     Author: steelmama     Publish Time: 2023-05-09      Origin: roll forming machine

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what is cold roll forming machine

cold roll forming machine is a piece of equipment used in the manufacturing process of metal products, such as sheets, tubes, and profiles. It is called "cold" because the forming process is done at room temperature, as opposed to "hot" forming which involves heating the metal.

COLD ROLL FORMING MACHINE

The machine works by gradually bending a long strip of metal through a series of rollers, which shape it into the desired profile or shape. The rollers are designed to gradually change the shape of the metal at each stage of the process, so that the final product has the desired dimensions and properties.

What is a roll forming machine used for?

Cold roll forming machines are used in a variety of industries, including construction, automotive, aerospace, and manufacturing. They are highly automated and can produce high-quality products at a high rate of speed, making them a popular choice for mass production.


There are various types of cold roll forming machines, each designed for a specific type of product or application. Here are some common types:


Sheet roll forming machine: Used to produce flat or corrugated sheets for roofing, siding, and other applications.


Tube roll forming machine: Used to produce round, square, or rectangular tubes for various applications, including construction, furniture, and automotive.

Profile roll forming machine: Used to produce various profiles, such as C-channels, U-channels, angles, and Z-sections, for construction, storage, and other applications.

Purlin roll forming machine: Specifically designed to produce purlins, which are structural elements used to support the roof or walls of a building.

Door frame roll forming machine: Used to produce door frames for residential and commercial buildings.

These are just a few examples of the types of cold roll forming machines available. Each type can be further customized to meet the specific needs of the manufacturer and the product being produced.


Cold roll forming process is that when the metal strip passes through several pairs of rollers with holes in sequence, the strip is fed forward as the rollers rotate. At the same time, it is continuously bent to obtain a desired cross-sectional shape. It can be seen that roll bending is a continuous bending method.

cold forming machine

Cold Roll Forming is a plastic processing method in which the entire length of the strip passes through several different holes in sequence, gradually bending and deforming locally, and the full cross-sectional shape is gradually close to the finished cross-sectional shape, and finally a product with a uniform full-length cross-section is obtained. The pass shape is surrounded by the contours of two or more forming rollers with a certain shape. The cold forming rollers may be horizontal rollers or vertical rollers.


Hole pattern is one of the important factors affecting product quality and productivity. The cold forming roller is installed on the frame. The forming roller responsible for driving the strip forward is driven by the motor through the transmission system. Generally, only the horizontal roller is the active roller, and the vertical roller is often the passive roller. Each machine base is called a cold roll forming machine, each roll forming machine is equipped with two or more forming rollers, and each row of forming unit is composed of more than two forming machines.


In the bending deformation zone of the cross section during the cold roll forming, the outer layer fiber of the bending piece is elongated by the pulling surface, and the inner layer fiber is compressed and shortened. Between the shortening and elongation, there is a layer of fiber with the same length, called the neutral layer, and the arc formed on the cross section is called the neutral line.


As the outer layer is strained to be pulled and compressed, it is easy to cause thinning and deformation. The inner layer is compressive strain, which is not conducive to plastic flow. Besides, the rigid contact of the convex corners of the forming roller makes the metal nowhere to flow, so the neutral layer has to move inward, so the thickness of the bending part is reduced, and the amount of thinning is generally Very small. When determining the thickness and width of the blank, it is considered that the thickness of the strip before and after molding is unchanged, and the sum of the unfolded lengths of the neutral lines in each part (line segment) after molding is equal to the width of the blank.


The material of the corner of the section of the cold-formed steel is cold-work hardened due to the plastic deformation of bending, that is, the strength is increased and the plasticity is decreased. This phenomenon is called the cold-bending effect. If the cold bending effect is used to increase the strength of the component design, 10% to 15% of steel can be saved, and it can also be used as a safety reserve for improving the strength of cold-formed steel components.


Cold roll forming machines are highly versatile and can be used to produce a wide variety of metal products with different shapes, sizes, and thicknesses. The machines typically consist of a series of rollers arranged in a sequence, which gradually bend and shape the metal strip as it passes through them. The rollers are designed to apply pressure at specific points to achieve the desired shape and dimensions.


One of the key advantages of cold roll forming is that it allows manufacturers to produce high-quality products with consistent dimensions and properties. This is because the process is highly automated and controlled, so there is little variation in the final product. Additionally, because the metal is not heated during the process, there is no risk of warping or other distortion that can occur with hot forming methods.


Cold roll forming machines can be customized to produce products with different materials, such as steel, aluminum, copper, and other metals. They can also be designed to produce products with different surface finishes, such as smooth, textured, or embossed.


In terms of production speed, cold roll forming machines can be quite fast, with some machines capable of producing several meters of product per minute. This makes them ideal for mass production of metal products, such as roofing sheets, door frames, and automotive components.


Overall, cold roll forming machines are an important tool for manufacturers who need to produce high-quality metal products with consistent dimensions and properties. They offer a cost-effective and efficient way to produce a wide range of products for various applications.


Due to the roll forming process, the strip is fed by the active forming roll. Therefore, cold bending forming can be combined with other processes such as welding, perforating, printing, cutting to length, iron wire and paperboard, etc. to form a joint continuous production line.



Other questions abou cold roll forming machine:

What is the advantage of cold rolling process?


There are several advantages of the cold rolling process, including:


1.Improved surface finish: Cold rolling can produce a smooth and polished surface finish on metal products, which is desirable for many applications, such as automotive and aerospace.


2.Increased strength and hardness: Cold rolling can increase the strength and hardness of metal products by work hardening the material. This is because the deformation of the metal during the cold rolling process creates dislocations in the crystal structure, which make the material stronger and harder.


3.Better dimensional accuracy: Cold rolling can produce metal products with tight dimensional tolerances and consistent thicknesses. This is because the process is highly controlled and the metal is not subject to the thermal expansion and contraction that can occur with hot rolling.


4.Reduced material waste: Cold rolling can produce metal products with high material utilization rates, as the process allows for tighter nesting of parts and less material waste.


5.Cost-effective: Cold rolling is a cost-effective process for producing high-quality metal products, as it is less energy-intensive than hot rolling and requires less equipment and maintenance.

What does a roll forming machine do?


roll forming machine is used to shape and bend metal into a desired shape or profile. The machine consists of a series of rollers arranged in a sequence, which gradually bend and shape the metal strip as it passes through them. The rollers apply pressure at specific points to achieve the desired shape and dimensions, and the final product is cut to the desired length.

How much does a roll former cost?

The cost of a roll former can vary greatly depending on several factors, such as the type of machine, the complexity of the profile and the features required for the specific application.


For example, a simple manual roll former for producing basic profiles can cost several thousand dollars, while a fully automated roll former with advanced features and capabilities can cost several hundred thousand dollars or more.


Additionally, the cost of a roll former can also vary depending on the manufacturer, location, and other factors such as shipping and installation costs.


It's important to note that the cost of a roll former is just one factor to consider when purchasing one. Other factors to consider include the machine's production capabilities, quality, reliability, and support services offered by the manufacturer. It's important to do thorough research and consult with experts to ensure that the roll former you choose is the right fit for your specific needs and budget.


What is the history of roll forming machine?


What is the difference between bending and roll forming?


Bending and roll forming are both metal forming techniques, but they are different processes with distinct characteristics.


Bending involves applying force to a metal sheet or plate to deform it into a desired shape. This can be done using a variety of tools, such as press brakes or rollers. The metal is typically bent along a single axis, and the process can be repeated to achieve more complex shapes.


Roll forming, on the other hand, involves gradually bending a long strip of metal through a series of rollers arranged in a sequence. The rollers apply pressure at specific points to achieve the desired shape and dimensions, and the final product is cut to the desired length. Roll forming can be used to produce complex shapes with multiple bends, and the process is highly automated and controlled.


One of the key advantages of roll forming over bending is that it allows for the production of long, continuous lengths of metal with consistent dimensions and properties. This makes it ideal for mass production of metal products, such as roofing sheets, door frames, and automotive components. Bending, on the other hand, is more flexible and can be used to produce a wide range of shapes and sizes, but is generally slower and more labor-intensive than roll forming.


In summary, bending and roll forming are different metal forming techniques that can be used to produce a variety of shapes and profiles. Bending is more flexible and can be used for a wide range of shapes, while roll forming is ideal for mass production of complex shapes with consistent dimensions and properties.



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