Plate rolling machine

A plate rolling machine is a machine that will roll different kinds of sheet metal into a round or conical shape. It can be also called a “roll bending machine”, “plate bending machine” or “rolling machine”.

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There are different kinds of technology to roll the metal plate:

• Four-roller machines have a top roll, the pinching roll, and two side rolls.

The flat metal plate is placed in the machine on either side and "pre-bent" on the same side. The side rolls do the work of bending. The pinching roll holds the plate.

• Three-roller machines (variable pitch aka variable geometry) have one pressing top roll and two pressing side rolls.

The three-roll variable pitch works by having all three rolls able to move and tilt. The top roll moves in the vertical plane and the side rolls move on the horizontal plane. When rolling, the top roll presses the metal plate between the two side rolls. The advantage of having the variable three roll is the ability to roll many thicknesses and diameters of cylinders.

For example; The side-rolls are what produce the mechanical advantage. With the side rolls all the way open, one has the maximum mechanical advantage. With the side rolls all the way in, you have the least mechanical advantage. So, a machine has the capability of rolling 2-inch-thick material with the maximum mechanical advantage, but a job is only 1/2 inch thick. Reduce the mechanical advantage and one has a machine that can roll from 1/2 to 2 inches thick.

Plate rollers can be powered and controlled in multiple ways. Older plate mills are driven by electric motors and newer ones are directed by programs that are loaded into the CNC controller. When thinking about plate roll acquisition, industrial machinery companies like Provetco Technology will ask about the working length of the roller, the maximum thickness of the material, top roll diameter size as well as the minimum thickness of the material. Furthermore, the material yield is another critical component to disclose to machinery companies when looking for a plate roller.

References

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Provetco Technology: www.provetco.com

Operator:

Our operators have a minimum of one to two years’ experience. They also need to know maintenance requirements and operation of the equipment. 

The forming process requires one or two persons depending on the weight of part. One experienced operator or a helper. This is machine can be ran by one or two persons. If by two, both persons communicate with each other to perform the task.

Equipment:

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Before use, the operator must inspect the equipment and check for prober operation. The machine needs to check for service (greasing, hydraulic fluid, and leaks). 

Drawing review 

The operator must review the drawing to understand the task at hand. The operator know the following:

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1. Material type and wall thickness

2. Blank Size of plate (width and length)

3. Radius or diameter

4. Weight

5. Special instructions 

The following be known to perform the task at hand.

Determine Capacity

Estimating capacity requirement is determined by operator and management. Management will use the section modules to determine capacity. There are manufacturing charts available. This is important for a safe production of the part.

Preforming Ends

The plate is put into the roll and each end is pre-formed to the specified radius. Each end must be      pre-formed correctly and checked with a template.

Wrapping

After pre-forming continue to roll the plate into a cylinder take multiple passes. Once rolled to butt fit the seam and tack. The operator can reroll after tacking.

Rerolling

After welding the operator may have to reroll the cylinder. The roll is opened and the cylinder is placed into the roll. The roll turns and the operator measured roundness in several places and applies pressure where ever needed. 

Take notes of your set up procedure for future use. This will help later on and add to the bottom line

Contact Paramount Roll to learn more about our plate rolling procedures

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