Case

SC 40X3500MM Universal Plate Rolling Machine For Sale

SC 40X3500mm universal plate rolling machine is a heavy-duty three-roll plate rolling machine designed for the manufacture of medium-thick and thick plates and large cylindrical bodies. Its core advantages lie in the universal adjustment of the upper roll, strong end pre-bending capacity, wide rolling range, and suitability for continuous production of large cylindrical bodies. It is an important forming equipment in the pressure vessel, storage tank, wind power, petrochemical, and heavy steel structure industries.

1. Overview of SC 40X3500mm Universal Plate Rolling Machine

The 40×3500mm upper-roller universal plate rolling machine is a type of 3-roll plate rolling equipment designed for the manufacture of medium-thick plates, high-strength steel plates, and large cylindrical bodies.

It typically adopts a universal upper roll structure such as W11S/W11SNC. Its core feature is that the upper roll can both lift and move horizontally, achieving pre-bending and rolling of the plate through changes in the upper roll position.

The universal plate rolling machine is a type of three-roll plate rolling machine. The biggest difference between this type of machine and a regular symmetrical three-roll plate rolling machine is that:

Regular symmetrical three-roll plate rolling machines mainly rely on the lifting and lowering of the upper roll to adjust the rolling radius, while the universal upper roll plate rolling machine, in addition to lifting and lowering the upper roll, can also achieve horizontal movement of the upper roll, giving the equipment a more flexible end pre-bending capability.

Therefore, it is particularly suitable for:

Pressure vessel shells
Storage tanks
Oil tanks
Wind towers
Wind turbine towers
Boiler shells
Chemical equipment
Pipelines
Steel structures
Engineering machinery structural components
Large cylindrical and curved workpieces

Some universal upper roll machines can also be extended to process conical cylinders, variable diameter cylinders, and large thin-walled cylinders by adding accessories such as conical rolling devices, side supports, and upper supports.

2. Parameter Description

“40×3500mm” typically indicates the equipment’s typical specifications: maximum rolling thickness approximately 40mm, maximum effective rolling width approximately 3500mm.

The actual 40mm rolling capacity must be determined in conjunction with the sheet yield strength, roll diameter, upper roll diameter, and the manufacturer’s specified operating conditions. It cannot be simply assumed that any 40mm steel plate can be rolled.

Among existing equipment of the same specifications, some manufacturers provide the following typical parameters:

Upper roll pressure approximately 480-540 tons
Upper roll diameter approximately 540-630mm
Lower roll diameter approximately 290-340mm
Main drive power approximately 45-55kW

Different design schemes show significant variations.

3. Basic Structure of the Upper Roll Universal Plate Rolling Machine

The 40×3500mm upper-roll universal plate rolling machine typically consists of the following parts:

1) Upper Roll System

The upper roll is one of the most important core components of the entire equipment.

Main functions:

Pressing the steel plate
Adjusting the rolling radius
Participating in end pre-bending
Controlling cylinder forming
Withstanding enormous bending loads

When rolling a 40mm thick steel plate, the upper roller needs to withstand a very large load; therefore, the upper roller is usually made of high-strength alloy steel.

Some manufacturers use 42CrMo forgings as the roller shaft material, and perform heat treatment and precision machining to improve strength, bending resistance, and durability.

2) Lower Roller System

The equipment has two lower rollers.

The two lower rollers typically perform the following:

Supporting the steel plate
Generating friction with the steel plate
Driving the steel plate to move
Working with the upper roller to complete the rolling
Forming a stable three-roller force relationship

In a typical three-roll hydraulic plate rolling machine, the two lower rollers are driven to rotate by the main drive system, while the upper roller is responsible for pressing down and position adjustment.

4. Equipment Working Principle

The entire 40X3500mm universal plate rolling machine rolling process can be simply understood as follows:

Steel plate enters → Upper roller presses → End pre-bending → Continuous rolling → Rounding → Unloading

The specific process is as follows:

Step 1: Steel Plate Loading

Utilizing:

Overhead crane
Crane
Loading trolley
Paper feeding device

Place a 40mm steel plate between the two lower rollers.

Due to the significant weight of the plate, special attention must be paid to plate positioning and lifting safety during actual production.

Step 2: Upper Roller Descends

The hydraulic system controls the descent of the upper roller.

The upper roller gradually presses the steel plate, creating a stable frictional and force relationship between the steel plate and the three rollers.

Step 3: End Pre-bending

By adjusting the horizontal and vertical positions of the upper roller, plastic bending is achieved at the end of the steel plate.

This step is crucial for the final cylinder quality.

Insufficient pre-bending can easily result in:

Long straight edges in the final cylinder.

Step 4: Continuous Steel Plate Rolling

The two lower rollers rotate.

The steel plate moves forward under friction, while the upper roller continuously applies pressure.

As the steel plate moves:

Flat plate → Curved plate → Semicircle → Approaching cylinder

Ultimately forming the desired cylindrical shape.

Step 5: Pre-bending the other end

The universal structure of the upper roller allows for pre-bending of the other end of the steel plate by adjusting its position.

Compared to traditional processes requiring frequent plate flipping, this significantly improves the operational convenience of rolling large, thick plates.

Step 6: Rounding

After pre-bending at both ends, the steel plate undergoes multiple roll bending and rounding adjustments.

Finally achieving:

Design diameter
Roundness requirement
Ovalness requirement
Matching requirement

5. Core Processing Capability Analysis

For a 40×3500mm rolling machine, the following indicators need to be focused on:

1) 40X3500mm Universal Plate Rolling Machine Maximum Coiling Thickness

Theoretical maximum coil thickness: 40mm

However, this figure is usually based on specific material conditions.

For example, the 40mm coiling capacity of a certain 40×3500mm machine is based on a sheet yield strength ≤245MPa, while specifying a minimum coiling diameter of approximately 1800mm. Its pre-bending capacity is approximately 32mm.

Therefore:

40mm is not a universal thickness, but rather the maximum capacity under specific material and diameter conditions.

If processing:

Q235
Q355
304 stainless steel
316L
High-strength low-alloy steel
Other special steels

The actual capacity will be significantly different.

2) Maximum Coiling Width

3500mm means the machine can handle sheets approximately 3.5 meters wide.

This makes it particularly suitable for large cylinder manufacturing.

For example:

3500mm wide steel plate
3-meter storage tank body
Large wind turbine tower body
Pressure vessel section
Chemical equipment body

The actual maximum plate width of some equipment is designed to be around 3550mm to allow for machining margins at the steel plate edges. A certain 40×3500mm NC rolling mill’s publicly stated parameters indicate a maximum plate width of 3550mm.

3) Rolling Diameter

The rolling diameter is a very important parameter.

Many purchasing personnel tend to focus only on: “How much does a 40mm×3500mm roll cost?”

However, for plate rolling machines, the minimum rolling diameter is equally important.

For example:

A certain 40×3500mm rolling mill’s published minimum rolling diameter is approximately:φ1800mm.

This means that if the customer actually needs to roll a φ2000mm cylinder, it may be relatively easy to achieve.

But if they need:

φ1000mm

φ800mm

φ600mm

Then the standard configuration of 40×3500mm may not be suitable.

Therefore, when purchasing, it is essential to clearly define the following three parameters: maximum thickness, maximum width, and minimum roll diameter.

6. Is side support needed?

For heavy-duty equipment (40×3500mm), I highly recommend considering side support devices based on the actual workpiece conditions.

The functions of side support include:

Preventing large cylinders from sagging
Stabilizing steel plates
Improving the rolling quality of large thin-walled cylinders
Reducing operator assistance
Improving safety

Some universal upper roller machines can be equipped with hydraulic side supports to support wide or thin plates, reducing sagging caused by the plate’s own weight.

7. Is top support needed?

If processing:

Large diameter cylinders
Thin-walled cylinders
Large storage tanks
Wind towers
Long cylinders

Then, consider configuring a top support device.

Its function is to prevent the already rolled cylinder from:

Elliptical deformation
Sagging
Deformation due to its own weight

Especially suitable for continuous production of large cylinders.

8. The biggest advantage of SC universal upper roller bending machine: reducing straight edges

Straight edges are a very important issue in cylinder manufacturing.

Assuming the steel plate is: 40mm × 3500mm

If the pre-bending at both ends is insufficient, noticeable straight areas may appear at both ends after rolling into a cylinder.

Subsequent steps required:

Trimming
Rounding
Flame straightening
Increasing machining allowance

All of these will increase costs.

One of the core values of the universal upper roller structure is its improved end pre-bending capability, thereby reducing the length of straight edges. This is what makes it more valuable than a typical symmetrical three-roll mill.

9. Suitable for processing which products?

1) Pressure Vessels

This is a very typical application.

For example:

Gas storage tanks
Pressure vessel cylinders
Chemical tanks
Steam equipment
Heat exchange equipment

2) Petrochemical Equipment

Suitable for processing:

Storage tanks
Oil tanks
Chemical towers
Pipeline cylinders
Large containers

3) Wind Power Equipment

Especially suitable for:

Wind turbine towers
Tower sections
Large cylindrical structures

The wind power industry typically requires wider, thicker steel plates and stable roundness, therefore heavy-duty upper-roll universal plate rolling machines have a significant advantage.