Also see;The Fabricator said:The four-roll styles have an additional roller underneath the top roll, which constantly pinches the plate during rolling. Double-pinch rolls can prebend both plate ends without removal, as is required with single-pinch rolls.
Three-roll machines generally require prebending the leading end, running the sheet through the machine to prebend the trailing end, and then switching roll rotation direction to roll the cylinder body. Four-roll plate rolls have a slight advantage in cycle time because they permit prebending of the leading edge, rolling the cylinder body, and finishing off the trailing prebend, all while rolling in the same direction.
The main difference between a 3-roller and 4-roller plate rolling machine is the number of rollers used to bend the metal plates. A 3-roller machine has two bottom rollers and one top roller, while a 4-roller machine has two bottom rollers and two top rollers. This difference in roller configuration affects the way the metal plate is fed and bent through the machine.
A 4-roller plate rolling machine is typically preferred for thicker plates. This is because the additional top roller allows for better control and distribution of pressure on the plate, resulting in more precise and accurate bends. 3-roller machines may struggle to bend thicker plates evenly.
Yes, both types of plate rolling machines can be used for a variety of metals, including steel, aluminum, and copper. However, the type and thickness of the metal may determine which machine is most suitable for the job. For example, a 3-roller machine may be better for thinner aluminum plates, while a 4-roller machine may be better for thicker steel plates.
One potential advantage of a 3-roller plate rolling machine is cost. They tend to be less expensive than 4-roller machines, making them a more budget-friendly option for smaller businesses or those with lower production needs. Additionally, 3-roller machines may be easier to operate and require less maintenance compared to 4-roller machines.
The decision between a 3-roller and 4-roller plate rolling machine will depend on various factors, such as the type and thickness of the metal, production needs, and budget. It is important to consult with a reputable supplier and consider your specific application requirements before making a decision. They can provide expert guidance and help you choose the best machine for your needs.