Overview
Plate rolling machine is a type of equipment that uses work rolls to bend and shape metal sheets into various shapes, including cylindrical and conical shapes. It is a crucial piece of processing equipment.
To put it bluntly, there is no single best sheet metal bending machine manufacturer, just the supplier that best suits your needs.
When purchasing a suitable roller bending machine for processing your product, there are several factors to take into consideration.
For more information, you can continue reading the following content.
However, a list of the ten largest sheet metal bending machine manufacturers in the world can still serve as a reference.
You can find more information about them in the following article.
- Top 10 Plate Rolling Machine Manufacturers
How to choose the right plate rolling machine?
1. Influence of metal material on roll bending production
The sheet material is one of the most crucial factors in the design of a sheet metal bending machine.
For example, when rolling plates of the same thickness, plates with high yield strength have strict requirements for plate bending pressure. Failure to consider this may result in defects or deformation at the corners of the processed material board.
Today, the strength of steel has increased greatly, leading to an increase in press brake rolling pressure requirements.
The American Society of Mechanical Engineers (ASME) has established corresponding standards for this, categorizing various grades of steel such as A36, A516grade70, Hardox400/500 series, AR200/300 series, etc.
The rolling pressure for steels with different specifications also varies.
The brittleness of the temper, the yield strength of the metal, and the intended use of the material plate are important factors that plate rolling machine manufacturers must consider.
This is especially significant as the iron and steel casting industry has undergone reforms in recent decades. For example, carbon steel has stopped being popular and has become a thing of the past.
2. Cooperate with manufacturers who are willing to discuss details with you
To get the desired result, the buyer must first learn to ask the right questions.
Each company has its own unique requirements. By answering these questions, the sales department can create a set of plans that best meet purchasing needs.
Companies should also consider whether they need to roll conical or parabolic products to expand their market.
The CNC laminator with a thick upper roller and a thin lower roller is an ideal model for laminating objects of this shape.
This rolling mill has the advantage of effectively eliminating wear on the surface of the material plate, thus eliminating the need for edge grinding at the tip of the cone.
Although the CNC system can theoretically achieve balance, precise taper rolling is actually achieved through torque balancing. Achieving a precise balance allows the material plate to process a perfect taper in 5 seconds.
On the one hand, procurement must provide the supplier with all the necessary details, including diameter, material, error, shape, etc.
For example, in the pressure vessel industry, there may be requirements for a roundness error in the diameter direction to be less than 1% or defect-free.
If the power of the sheet metal bending machine is too high, it may result in cylinder phenomenon, leading to unqualified products and severely impacting the company's profits.
On the other hand, the laminator manufacturer must take into account all of the buyer's unique needs.
The buyer must also find a manufacturer who is willing to sit down and discuss the details one by one.
Many details are critical but often overlooked by buyers. At this point, the responsible manufacturer must confirm these details.
3. Choose according to the best conditions
Companies often need to determine which materials and thicknesses will produce the best results.
Therefore, sheet metal bending machine manufacturers should design and manufacture corresponding machines based on these parameters, which can save a significant amount of time and greatly reduce the rework rate.
Experience shows that high-quality bending machines perform best when working at 50% of full load.
For example, a sheet rolling mill that can roll 10mm thick sheets produces the best results when rolling 5mm sheets.
An important issue in plate lamination is the size of the material plate. Apart from this issue, most problems focus on the pressure between the upper and lower rollers.
If a sheet rolling mill designed to roll 10mm sheets is used to roll 6mm sheets, cylindrical distortion may occur.
This often leads to difficulties, the biggest problem being when the sheet thickness reaches the limit of the roll bending machine. Without the use of gaskets, the entire machine must be discarded.
On the other hand, when a sheet metal bending machine with a large sheet thickness is designed to roll sheets of thin material, the strength of the sheets of material in the middle is greater than that around them, leading to hourglass deformation that cannot be corrected without the use of shims.
4. Carefully consider the thickness and diameter of the coil
The smaller the diameter, the higher the rolling pressure required. When the inner diameter of thick plate is very small, designers must pay attention to the position of the upper roller and the structure of the plate calender, as these two factors significantly impact the size of the opening.
The maximum winding circle diameter designed for most press brakes is 1.5 times the diameter of the upper roller.
So a 50mm top roller can roll up to a maximum inner diameter of 75mm.
There is now a new technology that allows almost half of the material plate to be under pressure during the bending process, which increases the maximum bending diameter of the design to 1.1 times the previous method and increases the effective diameter range by 30 %.
It is important to note that the range of best rolling precision that all sheet metal bending machines can achieve is half the design standard.
5. Coordination of horizontal and vertical support forces
When designing a plate bending machine, the designer must consider the supporting force of the material plate in two directions: horizontal and vertical.
Taking this into consideration results in fewer labor requirements as one person can complete the workload that would originally require two.
It is important to note that when rolling cylindrical products, if the diameter is greater than 200 times the thickness of the sheet, the sheet will bend due to its own weight, which will result in an incorrect diameter. To avoid this, a plate bending machine with material plate support function must be used.
However, some manufacturers may choose to use forklifts and cranes as supports to reduce costs, but this approach is often ineffective and limits the scope of application of the equipment.
Many buyers tend to ignore key factors, which results in the equipment purchased not meeting their requirements and causing problems for the production department.
