CNC Plate Bending Machine

What is a Steel Plate Rolling Machine? The Plate Rolling Machine (also named Plate Roller, Plate Bending Machine, and Bending Rolls) is a device for the radial forming of flat sheets. The Hydraulic/Mechanical Plate Rolling Machine works similarly to a Profile Bending Machine. However, its design is much simpler.
The Plate Rolling Capacity of CNC, PLC Steel Plate Rolling Machine: : Bending thickness from 2.00mm to 160.00mm, plate rolling width from 1,000.00mm up to 10,000.00mm.

Six Types of Steel Plate Rolling Machines

Plate Bending Machines are available in a wide range. The smallest devices are table machines with manual operation by a hand crank. The largest Plate Rollers are found in shipyards and can bend sheets several centimeters thick, for example for ship armor.

There are 6 types of plate rolling machines currently on the market. Their roll bending work principle is the same, but the structure is different. Of course, the manufacturing cost, efficiency, and precision will definitely be different:

• Type 1: Initial pinch bending rolls
• Type 2: Double pinch bending rolls
• Type 3: Pyramid bending rolls
• Type 4: Top roll variable geometry bending rolls
• Type 5: Variable geometry bending rolls
• Type 6: 4-roll plate bending machine

Benefits and Applications

1. The initial pinch bending rolls belong to the asymmetric plate rolling machine, which can be pre-bent at one end, which means that the other side needs to be removed for work pre-bending, and the work efficiency is not as good as that of the double pinch bending rolls.
2. Double pinch bending rolls can be a 3-roll or 4-roll plate roll available in light to very heavy capacities. Double pinch bending rolls can prebend both plate-ends without removing the workpiece there increasing work efficiency. Four-roll plate rolls generally are the only equipment with CNCs.
3. The pyramid bending rolls are rarely used in cutting-edge facilities. No pre-bending capability, which means long unbend flats and not as user-friendly as other types of plate rolling machines. The very low investment cost is their only advantage.
4. Variable geometry and PRT top roll horizontal and vertical movement 3-roll plate rolls are built to handle medium to extremely heavy plate rolling applications. Easy-to-remove end yokes can make material removal a quick process.
   A machine of this type works well over a wide range of material thicknesses.
   The lower roll horizontal movement (PRV 3-roll variable geometry bending rolls) or top roll horizontal and vertical movement(PRT 3-roll plate rolls) increases the offset distance from the top roll and in so doing delivers a distinct mechanical advantage in bending.

Working Principle of Pyramid 3-Roll Steel Plate Rolling Machine

Pyramid 3-roll plate bending machine with three work rolls in a triangular arrangement.

There is a top roll (left image: 1) in the middle symmetrical position of the 2 lower rolls (left image: 2). The upper roller is passive and can be adjusted up and down in the vertical direction. Apply pressure to get different degrees of bending. The lower rollers are distributed horizontally, installed in fixed bearings, and rotated in the same direction and at the same speed by the motor through the gear reducer.

When working, the metal plate is placed between the top and lower rolls, the upper roll is pressed down, and the lower rolls are rotated. Under the action of pressure and friction, the metal plate is bent uniformly at three consecutive points, thereby completing the roll forming.

The bending radius of the metal sheet is determined by the pressing amount of the top roll. The greater the pressing amount, the smaller the bending radius; otherwise, the larger the bending radius is.

Read More: Best Guide to Plate Rolling Process: Formula, 2 Tips, 11 Keys

Working Principle of Initial pinch 3-Roll Steel Plate Rolling Machine

Initial pinch 3-roll plate bending machine, the top roll(left image: 1) is located above the lower roll(left image: 2), and the other roll(left image: 3) is on the side, which is called the side roll. The top and lower rolls are driven by the same motor to rotate, the lower roll can be adjusted up and down, and the maximum distance of adjustment is approximately equal to the maximum thickness of the steel plate that can be rolled. The side roll 3 moves up and down and has dual functions of pre-bending and rolling. When bending, plate material(left image: 4) is sent between the upper and lower rollers, and the lower roller is adjusted to press the sheet material to generate a certain frictional force, and then the pressure of the side rollers is adjusted. When the top and lower rolls rotate, the steel plate is bent.

Working Principle of 3-Roll and 4-Roll double pinch Steel Plate Rolling Machine

The 3-roll and 4-roll double pinch Steel plate bending machines(Their power system is driven by hydraulic motors) are basically similar to the 3-roll initial pinch plate rolling machine, except that a side roll 3 is added on the other side, and the rolls on both sides move in a straight line or arc to the upper roll to adjust the radius of curvature of the plate rolling., and the sheet bending is handled by the rolls 3 on both sides respectively, so the remaining straight edges at both ends are very small and do not Pre-bending and U-turn roll-bending are required, and the entire roll-bending process can be completed directly.

The difference between the three-roll and four-roll double pinch plate rolling machines is that the three-roller machine does not have a lower roller 2, while the four-roller bending machine can be equipped with a CNC control system.

How to choose the right Steel plate rolling machine?

With the aim to best satisfy every application requirement, BIT’s line of various types of plate bending machines offers a simple and efficient means to roll your metal plate materials.

The best way to determine the best sheet or plate bending machine for the job is to find out what various machines can do. Remember, machine capacity is important, it must match your material, and most plate roll manufacturers can provide detailed capacity-versus-yield tables to assist you. There is also the pre-bending ability of the rolling machine is also very important, the pre-bending ratings are lower than the rolling capacities for any given machine.
You must be mindful when reviewing machine capacities that the maximum rolling capacity is usually expressed with the basic requirement of multiple rolling passes and very long unbent flats. You also must note the material thickness and width and equipment characteristics such as cylinder diameter, machine type, yield, and diameter of rolls.
By obtaining that information, you can properly size and select a plate roller to fit your particular bending application.
Of course, you can read our recommendations for plate roll bending application below, it will also provide a better reference:

The PRA initial pinch Sheet Metal Rolling Machine, PRD Sheet Metal Rolling Machine with a double pinch, PRS 3-roll pyramid bending roll, or PR4 four-roll pyramid bending roll will be bending for bending thin plates in a reliable and economical manner. For rolling thicker plates, BIT produces and offers three different models: PRT 3-roll bending roll with top roll variable geometry, PRV three-roll variable geometry bending roll, and PR4 four-roll pyramid bending roll.
Read More: How To Choose The Right Plate Rolling Machine?