Top Plate Rolling Machine Manufacturer

We start manufacturing since 1982.

Plate Rolling Machine: The Ultimate Guide

Overview

The plate rolling machine is a kind of equipment that uses the work roll to bend and form the sheet metal.

It can form cylindrical parts, conical parts and other parts of different shapes. It is very important processing equipment.

plate rolling machine

The working principle of the plate rolling machine is to make the work roll move through the action of external forces such as hydraulic pressure and mechanical force, so as to make the sheet press or roll forming.

According to the rotation movement and position change of work rolls with different shapes, oval parts, arc parts, cylindrical parts and other parts can be rolled.

It is widely used in chemical, boiler, shipbuilding and other mechanical industries.

According to the different application scope of the plate rolling machine, the plate bending machine is divided into three roll plate bending machine and four roll plate bending machine from the number of rolls.

What is plate rolling machine?

Rolling machine (also known as circle rolling machine) is a machine tool used for continuous point bending of metal sheets, which can roll metal sheets into cylindrical, arc or other shaped workpieces.

What is plate rolling machine

The relative position change and rotation movement of the workpiece are used to make the plate produce continuous plastic deformation, so as to obtain the workpiece with predetermined shape.

According to its structure, it can be divided into two roll plate bending machine, three roll plate bending machine and four roll plate bending machine.

Among them, the three roll plate bending machine is divided into the upper roll universal three roll plate bending machine, the symmetrical three roll plate bending machine, the horizontal downward adjustment plate bending machine and the arc adjustment plate bending machine.

From the transmission mode, it can be divided into hydraulic three roll rolling machine and mechanical three roll rolling machine.

The two roll plate bending machine usually processes small size plates, while the four roll plate bending machine is usually used to process large plates, such as marine steel plates.

Plate rolling machine is widely used in boiler, shipbuilding, petroleum, woodworking, metal structure and other machinery manufacturing industries.

Working principle of plate rolling machine

Working principle of plate rolling machine

There are many specifications and models of the plate bending machine.

According to the mechanical structure of the plate bending machine and the number of rolls of the plate bending machine, there are three roll plate bending machine and four roll plate bending machine.

According to the driving mode of the roll, there are mechanical plate bending machine and hydraulic plate bending machine.

The structure of the plate bending machine is relatively simple.

Among the three rolls, there is a pair of side rolls and an upper roll, of which the upper roll can move up and down.

The structure of the four-roll plate bending machine is relatively complex. It has a pair of side rolls and an upper roll and a lower roll. This kind of plate bending machine has high cost, but good performance and good quality of rolled products.

The driving combined plate bending machine mainly includes a dumping device, a transmission part, an upper roll, a lower roll and a frame.

Its structure is: the pinions of multiple transmission parts mesh with the big gears at the end of the upper roll.

The transmission part is two groups, which are horizontally and symmetrically arranged with the upper roll.

The transmission part can also be three groups, and the upper roll is symmetrically arranged with a 120 ° circle center.

The transmission part can also be four groups, and the upper roll is symmetrically arranged with a 90 ° circle center.

The working principle of the rolling machine is the same.

By adjusting the relative position of the upper roll and the side roll, the sheet metal is gradually bent and deformed between the rolls.

The positive and negative rotation of the main shaft makes the sheet metal move back and forth between the rolls until the sheet metal produces plastic deformation.

With the continuous adjustment of the relative position of the roll, the main shaft continuously reciprocates and reacts, and the plastic deformation of the sheet metal gradually increases until it is processed into a circular arc or circular pass product that meets the requirements.

The working capacity of the plate bending machine refers to the capacity of the minimum drum diameter when the maximum plate thickness and width are rolled according to the specified yield limit under the cold state.

Most of the users at home and abroad are using the cold rolling method.

The cold coil has high precision, simple operation process and low cost, but it has high requirements for the quality of the plate (such as no notch, crack and other defects) and good consistency of metallographic structure.

When the rolled plate thickness is large or the bending radius is small and exceeds the working capacity of the equipment, the hot rolling method can be adopted on the premise that the equipment allows.

For some plates that are not allowed to be cold rolled, if the rigidity of the hot roll is too poor, the warm roll method shall be adopted.

Processing method of bending forming of plate bending machine

Processing method of bending forming of plate bending machine

In the manufacturing of steel structure, the bending forming processing mainly includes several processing methods, such as rolling (rounding), bending (simmering), folding and die pressing.

The bending forming process is completed by hot processing or cold processing.

Rounding is the bending deformation caused by the elongation of the outer fiber and the shortening of the inner fiber of the steel plate under the action of external force (the middle fiber remains unchanged).

When the cylinder radius is large, it can be rolled at room temperature. If the radius is small and the steel plate is thick, the steel plate shall be heated and rolled.

There are three methods of rolling steel plate at normal temperature: mechanical rolling, mold pressing and manual manufacturing.

Mechanical rounding is carried out on the plate rolling machine (also known as the plate rolling machine and the round rolling machine).

The bending of plates on the rolling machine is achieved by the pressure generated when the upper roller moves downward.

The working principle of the rounding is shown in the figure below.

working principle of the rounding

A) Symmetrical three roll bending machine
B) Asymmetrical three roll bending machine
C) Four roll bending machine drawing

If a three roll bending (coiling) machine is used to bend the plate, both ends of the plate need to be pre-bent.

The pre bending length is 0.5L + (30~50) mm (L is the center distance of the lower roll).

Pre bending can be performed by pressing with a press or by using a support plate in the rounding machine:

Pre bending

a) Press and pre bend with a press machine
b) Pre-bend with a support plate in the rounding machine

Different Types of plate rolling machine

As a special machine, the plate bending machine plays an important role in the basic industrial processing.

Generally if the forming steel is cylindrical, the rolling machine will be needed for roll bending. It is applied in automobile, military industry and other fields.

According to different requirements, it can roll steel columns that meet the requirements and it is a very practical instrument.

In foreign countries, the roll bending machine is generally divided by the configuration of work rolls.

In China, the mixing classification is generally carried out based on the number and adjustment form of work rolls, which are generally divided into:

  • Three roll plate bending machine:
    including symmetrical three roll plate bending machine, asymmetric three roll plate bending machine, horizontal adjustment three roll plate bending machine, inclined adjustment three roll plate bending machine, arc adjustment three roll plate bending machine and vertical adjustment three roll plate bending machine.
  • Four roll plate bending machine:
    it is divided into side roll tilt adjustment four roll plate bending machine and side roll arc adjustment four roll plate bending machine.
  • Special purpose plate bending machine:
    there are vertical plate bending machine, marine plate bending machine, double roll plate bending machine, cone plate bending machine, multi roll plate bending machine and multi-purpose plate bending machine, etc.
Different Types of plate rolling machine

It has been decades since the mechanical transmission was adopted for the plate bending machine.

Due to its simple structure, reliable performance and low cost, it is still widely used in small and medium-sized plate bending machines.

On the low-speed and high torque plate bending machine, because the transmission system is huge, the motor power is large, and the power grid fluctuates greatly when starting, more and more hydraulic transmission is used.

In recent years, there are rolling machines with mixed mechanical and hydraulic transmission that use hydraulic motor as the source to control the movement of work roll, but the main drive is still mechanical transmission, and there are also full hydraulic rolling machines that use hydraulic motor as the rotating power source of work roll.

Advantages & disadvantages of plate rolling machine

Advantages & disadvantages of plate rolling machine

Advantages and disadvantages of three roll plate bending machine

The plastic metal plate with flat specification passes between the three work rolls (two lower rolls and one upper roll) of the plate bending machine.

With the help of the lower pressure of the upper roll and the rotation movement of the lower roll, the metal plate undergoes multiple passes of continuous bending (inner layer compression deformation, middle layer unchanged, outer layer tensile deformation), resulting in permanent plastic deformation, and is rolled into the required cylinder, cone or part of them.

The upper roll of the three roll plate bending machine can be vertically lifted and lowered.

The vertical lifting hydraulic transmission is obtained by the hydraulic oil in the hydraulic cylinder acting on the piston rod;

The lower roll is driven by rotation and meshed with the output gear of the reducer to provide torque for the rolling plate. The lower part of the lower roll is provided with a supporting roll and can be adjusted.

The upper roll is in drum shape, which improves the straightness of the products.

It is suitable for super long cans with various cross-section shapes.

The disadvantage of the three roll bending machine is that the plate ends need to be pre bent with the help of other equipment.

The machine is suitable for large-scale plate bending machines with a thickness of more than 50mm.

A row of fixed idlers are added at the lower part of the two lower rollers to shorten the span of the two lower rollers, so as to improve the accuracy of the rolled workpiece and the overall performance of the machine.

Advantages and disadvantages of four roll plate rolling machine

The operation process of the four roll plate bending machine is simple. There are only two steps: pressing and rotating.

To a certain extent, it can save the time of manual work, thus improving the work efficiency.

On the other hand, its accuracy of winding circle has been improved to a certain extent, but it also has some shortcomings in other aspects.

For example, each circle rolling takes a long time and requires manual loading and unloading.

However, it can be continuously improved in the future and becomes a more practical bending machine.

Parts & functions of plate rolling machine

The plate rolling machine is mainly used to roll some metal plates into cylinder shape or arc shape.

Most of the cylindrical steel is made of plate rolling equipment, which has a very good effect in many machinery manufacturing industries.

Let’s take a look at the introduction of its specific structure.

Parts & functions of plate rolling machine
  • The upper roll device is generally composed of main oil cylinder, upper roll bearing seat, upper roll and double row self-aligning bearings. Among them, the upper roll is an important part for the operation of the plate bending machine. The journals at both ends of the upper roll use extra wide double row rolling bearings. Because the self-aligning roller bearings are used, it will be more conducive to the inclination of the main roll and taper coiling.
  • The horizontal moving device is powered by the moving motor, and then the reducer, worm gear and screw nut mechanism drive the upper roll device to move horizontally, which can better realize the asymmetric rolling of plates.
  • The lower roll device is generally composed of lower roll, bearing seat, gear, sliding bearing, etc. As an important part of the plate rolling equipment, the lower roll is generally used in places with normal temperature, low speed and heavy load.
  • The idler device is composed of idler, wedge mechanism, etc. The idler can be adjusted according to the specifications of rolled plates.
  • In addition, the main transmission device is composed of a main motor and a brake reducer.
  • The tipping device is composed of ram and tipping cylinder. It is installed on the side of the overturned rack to overturn and restore the overturned rack.

Specifications of plate rolling machine

  • The parameters of the roll bending machine mainly include:
  • Maximum thickness of coiled plate (mm)
  • Maximum width of coiled plate (mm)
  • Plate yield limit (MPA)
  • Rolling speed (m/min)
  • Minimum diameter of full load coil (mm)
  • Upper shaft diameter (mm)
  • Diameter of lower shaft (mm)
  • Center distance between two lower axles (mm)
  • Main motor power (kw)
  • Machine weight (T)
  • Overall dimension (length × wide × Height) (mm)

Applications of plate rolling machine

Applications of plate rolling machine

The plate bending machine is called the “machine of production machine” and is the “mother machine” of work.

At first glance, it seems that it has no close relationship with our life, but in fact, all kinds of products we use are inseparable from the plate bending machine.

The plate bending machine is required to participate in the production in many fields such as automobile, aviation, it, medical treatment, energy and so on.

With the continuous expansion of the application field of the plate bending machine, the corresponding standard of the plate bending machine will become more and more important.

Nowadays, with the continuous expansion of the application field of the plate bending machine, the corresponding plate bending machine standard will become more and more important.

Therefore, while making full use of the existing standards, we need to study new standards and new systems that can be applied to the future development, so as to promote the development of the plate bending machine technology to a higher level and continuously improve the level and grade of the plate bending machine products.

Industry insiders predict that in the future, the market supply of hardware bending machines will develop from a single variety to multiple varieties and specifications to meet the needs of complete sets of manufacturing projects.

Low end plate bending machines can not support the future. Focusing on design and R & D is an important way out for future industrial development.

The plate rolling machine manufacturers will spare no effort to promote the construction of automatic scientific and technological innovation center of bending machines, create a platform for the transformation and upgrading of traditional industries of bending machines, and develop sophisticated bending machine products.

It is believed that under the huge demand environment, the development prospect of the plate bending machine industry will be broad and boundless.

What affects the price of plate rolling machine?

The price of the plate rolling machine has always been a topic of great concern to all users.

Once its price changes and differences will affect the interests of all users.

So today, let’s talk about the factors that will affect the price of the plate bending machine, so as to help users make better choices.

Specifications and dimensions:

There are many sizes of plate rolling machines, that is, there are many types of equipment, which gives customers more choices.

Of course, the prices of plate bending machines of different sizes are also different.

The price of larger specifications is on the high side, while the price of smaller specifications is on the low side.

The customer can contact the manufacturer to customize the specific specification and size design.

If the customer is not satisfied with the price, both parties can negotiate and agree on an appropriate price.

What affects the price of plate rolling machine

Sheet used:

It is a machine used to process different plates to obtain the required parts of corresponding size and shape.

The larger the width and thickness of the plate to be processed, the larger the volume of the processed parts.

The price of this kind of plate bending machine has a certain relationship with the selection of plates applicable to the machine.

Mechanical or hydraulic:

According to the working principle, it can be divided into mechanical type or hydraulic type, and then mechanical type can be divided into symmetric and asymmetric types.

Not only the working principle of mechanical type and hydraulic type is different, their performance characteristics and application conditions are also different. You can choose according to your needs.

The price of mechanical type and hydraulic type is also very different, because there are differences in design principle and difficulty, and the prices given by different manufacturers are different.

Therefore, if users want to buy high-quality full-automatic plate bending machines, it is recommended that do not look at the price first, but the specifications, performance and other aspects of each plate bending machine, so that you will not miss many plate bending machines that are very suitable for your working conditions because of the price.

How to use plate rolling machine?

The working principle of the plate bending machine is to make the work roll move through the action of external forces such as hydraulic pressure and mechanical force, so as to make the sheet press or roll forming.

According to the rotation movement and position change of work rolls with different shapes, oval parts, arc parts, cylindrical parts and other parts can be machined.

Then, what are the processes when using the roll bending machine? Let’s have a look.

Preparation before using the roll bending machine

  • Each part of the inspection is normal, and the fastening screw (cover) must not be loose. The braking shall be normal and reliable.
  • Adjust the roller distance strictly according to the plate thickness, and do not overload the operation. Workpieces whose mechanical properties exceed the specified range cannot be rolled.

Precautions in operation of plate bending machine

  • The workpiece shall be put in stably, and the start-up operation shall be carried out after one time, and the signal shall be clear and the command shall be specified.
  • Do not put your hand on the rolled steel plate. Do not use the inspection model. The inspection model needs to be used for rounding after shutdown.
  • When the workpiece rolls to the end of the steel plate, a certain margin shall be reserved to prevent the workpiece from falling and hurting people.
  • It is forbidden to stand on the workpiece or find roundness on the rolled cylinder during the operation of the rolling machine.
  • When rolling thick and large diameter cylinders or workpieces with high material strength, a small amount of moving rolls shall be reduced and rolled for many times.
  • When rolling narrow cylinders, they shall be rolled in the middle of the roll.
  • After the workpiece enters the roll, prevent hands and clothes from getting involved in the roll.

Precautions for shutdown of plate bending machine

  • If any abnormal noise is found during the operation of the machine tool, stop the inspection immediately for adjustment and repair.
  • Turn off the switch and cut off the power.
  • Place the workpiece at the specified position after shutdown.

The above is the process of using the roll bending machine.

In the process of using the machine, we should follow the above process to avoid problems in the operation of the staff.

How to use plate rolling machine

Tips for using plate rolling machine

Pay attention to the following tips during the use of the bending machine:

  • According to the provisions in the machine lubrication diagram, add oil to each oil cup lubrication and manual lubrication point as required.
  • In the process of operation, once irregular noise, impact and other abnormal phenomena are found, the equipment shall be shut down immediately for inspection.
  • After the power is turned on, carry out the positive and negative directions of the lower roll and the lifting movement of the upper roll, and check whether each movement is abnormally stuck.
  • The operation shall be carried out in strict accordance with the processing procedures and operation methods of the plate bending machine. When the upper roll rises and falls to a certain position, great attention shall be paid to the stable operation of the equipment.
  • During operation, all personnel shall coordinate with each other and follow the command of the person in charge of rolling. It is forbidden to start the machine without a password.
  • When the main drive is shut down, the upper roll can be lifted, the tilting reset of the overturning bearing and the upper roll can be tilted.
  • Great attention shall be paid to prevent the hand from being pressed by the steel plate and rolled together with the steel plate during the plate rolling operation of the large pipe rolling machine.
  • When lifting the steel plate or drum with a crane, be careful not to collide with the machine.

The above points are about the problems that should be paid attention to in the use of the roll bending machine

Maintenance of plate rolling machine

  • Fill all oil cup lubrication and manual lubrication points as required according to the provisions in the machine lubrication diagram.
  • The plate is rolled according to the parameters specified by the rolling machine. The thickness and length of rolled plates are 20mm and 2500 mm, and the yield limit of rolled plates is less than 250 MPa.
  • After the power is turned on, the lower roller moves forward and backward, and the upper roller moves up and down. There is no abnormal jamming in each movement
  • Strictly follow the coil processing procedures and operation methods. When the upper roll is lifted to the limit position, pay great attention to the operation of the equipment.
  • After the main drive stops, the upper roll can be lifted, the turning bearing can be reset, and the upper roll can be tilted.
  • If abnormal phenomena such as irregular noise and impact are found during the operation of the bending machine, the inspection shall be stopped immediately
  • During operation, all personnel shall coordinate with each other and follow the command of the person in charge of the coil panel. It is forbidden to start the machine without a password.
  • During the operation of the plate bending machine, great attention shall be paid to that the hands are pressed by the steel plates and the steel plates are rolled together.
  • When lifting steel plates or drums with a crane, be careful not to collide with the machine. After rolling, clean the finished materials, maintain the equipment, and turn off the power in time.

Troubleshooting of plate rolling machine

Since the plate bending machine will bear a large load during operation, there are many faults during the use of the plate bending machine.

Next, we will introduce two common faults and their handling methods.

1. Fracture and repair of main shaft of plate bending machine

A 50×3000 plate bending machine in a machinery factory had cracks on the main shaft after one year of production and use.

Through flaw detection with an ultrasonic detector, it was found that the structure of the main shaft was divided into two parts, one was a forged part, the other was a cast part, which did not meet the requirements of the national standard for class II flaw detection.

In order to find out the cause of damage more accurately, the maintenance personnel cut the main shaft for observation and found that the detection results were accurate.

After analysis by the maintenance personnel, it is found that the main reason for the fracture of the main shaft is that the welding is not in place.

The welding area is small, the process is rough, and there are welding slag inclusions, resulting in low strength defects.

1.1 Repair scheme.

According to the stress condition of the main shaft, we use the form of butt weld for welding.

First, two U-shaped grooves are made at the welding position, and a pit and a boss are respectively machined at the center of the broken shaft. The tolerance fit is H7/H7.

In order to ensure the coaxiality of welding, a V-shaped sizing block and an equal diameter ring are designed. configuration.

1.2 Welding materials and methods.

Through the inspection of the main shaft material by the inspection equipment, it is found that it is No. 45 steel, but the welding performance of this steel is very poor, which brings a lot of obstacles to the welding

On the other hand, due to the large diameter of the main shaft, pre heating is required before welding.

The welding machine uses XC500 carbon dioxide gas shielded welding machine.

The welding wire is ER50-6 welding wire with a diameter of 1.2mm.

During welding, the voltage is stable at about 35V, the current is between 220-250a, and the speed is about 15-25cm/min.

In order to ensure the full penetration of the main shaft, the speed must be slowed down during the first welding, and the straight-line strip transportation method shall be used at the beginning

Then, as the width of the groove becomes larger and larger, the mode of welding movement will be changed to the sawtooth form, which can minimize the deformation.

In addition, the welding shall be carried out by two people at the same time, and the welding process shall be rotated up and down in turn.

1.3 Welding.

Before welding, some pretreatment work shall be carried out.

First, the main shaft shall be disassembled, and some process equipment such as pits and grooves shall be processed on the main shaft according to the requirements of the drawing, and the two broken shafts shall be tried for assembly.

In order to avoid the impact of welding slag on the assembly, the place close to the weld shall be cleaned with a slag remover to dispose of the waste slag generated in the machining process.

Then put the broken shaft on the T20 boring machine, use the V-shaped sizing block to adjust the horizontal height difference, use the roller to connect the two broken shafts, use the cutter ruler to check the coaxiality, and use the thin copper sheet for fine adjustment to ensure that the coaxiality error is within 0.05mm.

Finally, use angle iron to reinforce the four ends.

In order to reduce the deformation of the main shaft during welding, we use the method of two people welding at the same time.

The roller installed on the main shaft is welded symmetrically in four positions, up, down, left and right, and the welding length is gradually increased.

After each welding, the welding slag should be removed in time, and the welding stress should be removed by knocking the weld.

In order to ensure the coaxiality error, stop welding when the welding reaches 3/5 groove depth, and check the coaxiality deviation to determine the next welding bending direction.

Straighten the spindle by properly lengthening the welding arc and increasing the current.

1.4 Effect.

Statistics show that after this spindle repair, there has been no spindle crack in the past three years.

The whole welding repair process lasted for four days, using 15kg welding rod, plus the machining cost and material cost in the repair process, a total of 5788 yuan was spent.

If a new spindle is purchased, it will cost 220000 yuan, and it will take 35 days to transport and install.

In contrast, spindle repair not only saves cost, but also reduces time and improves efficiency.

2. Repair of motor failure of plate bending machine

A em040-160 three roll pressure plate bending machine made in Italy suddenly stopped running when it was working.

After inspection, the electrical signal was normal, and it was preliminarily identified as a mechanical fault.

The maintenance worker shall first remove the motor from the tail of the upper roll, manually turn the input shaft of the upper roll reduction gearbox, and confirm that the reduction gearbox has no fault.

After disassembling the motor, it was found that a movable cover plate was broken on the end face of the oil distribution plate at the oil inlet side of the motor.

At the same time, the sealing ring under the cover plate had also been damaged, and the damaged debris entered the plunger, causing oil channeling inside and outside the oil distribution plate, which could not generate working pressure.

The hydraulic motor used in this bending machine is an imported Sai brand s7b3000or five-star radial piston motor.

If you re-purchase the motor parts from the manufacturer, it will not only take a long time but also cost a lot.

According to the production task and production progress of the factory, the equipment maintenance department decides to repair the motor by itself.

First, a movable cover plate is machined according to the size of the oil distribution plate.

Then contact the oil seal agent to deliver a sealing ring. The original seals are O-ring and circular groove ring.

After contacting the agent, it was found that the agent only has O-ring and plane ring, while the original sizes are 2.5 and 1.9mm, and the existing sizes are 2.5 and 1.4mm, which cannot be used directly.

In the absence of a 1.9mm retaining ring, use a 3mm retaining ring instead.

Since the oil distribution plate oil seal groove is 3.6mm deep and 3.2mm wide, the 3.0 O-ring has a little gap in the groove for compression, and the 1.4 plane retaining ring can be placed stably in the groove.

Assemble the motor, reset the machine, rotate the upper roll freely. After being put into operation for 1 month, the motor still operates normally.

3. Conclusion

To sum up, due to the large driving power required in the plate rolling process and the huge volume of the plate rolling machine, in addition to bending the workpiece, a large part of the power consumed in the plate rolling process is consumed in the mechanical system and hydraulic system.

Moreover, in the process of use, due to the large load, it is very easy to fail during impact.

There are many types of faults of the plate bending machine. Two common faults and repair methods are given above.

With the continuous development of technology, there will be more failures and more solutions in the future work of the roll bending machine.

In continuous practice, the maintenance technology of the roll bending machine will be continuously improved.

Best plate rolling machine Suppliers/Manufacturers

Best plate rolling machine SuppliersManufacturers

To be honest, there is no best manufacturer of plate bending machine, only the most suitable supplier for you.

There are many factors to consider when buying a roll bending machine suitable for processing your own products.

You can continue to read the following content to learn more.

However, the list of the world’s top ten plate bending machine manufacturers can still be used as a reference.

You can learn about them in the following article.

How to choose the right plate rolling machine?

1. Influence of metal material on roll bending production

One of the most important factors in the design of the plate bending machine is the material of the plate.

For example, when rolling the plate with the same thickness, the plate with high yield strength must have high requirements for the pressure of the plate bending machine.

If it is not considered, the processed material plate will have defects or corner deformation.

Nowadays, the strength of steel is much higher than before, and the requirements for the rolling pressure of the bending machine are also increased.

ASME (American Society of Mechanical Engineers) has also formulated corresponding standards for this, which classifies various types of steel, such as A36, A516grade70, hardox400/500 series, AR200/300 series, etc.

The rolling pressure of steel with different specifications is also different.

The temper brittleness, yield strength of metal and the application occasion of material plate are all important factors that should be taken into account by plate rolling machine manufacturers.

Especially since the reform of the iron and steel smelting industry in recent decades, this is particularly important.

For example, the former mild steel has already become history and is no longer popular.

How to choose the right plate rolling machine

2. Cooperate with manufacturers who are willing to discuss details with you

In order to get the desired answer, the purchaser should first learn to ask the right questions.

Each enterprise has its own unique needs. By answering the questions of the system, the sales department can make a set of schemes that are most suitable for the purchase needs.

Enterprises should also consider whether they need to roll conical or parabolic products in order to expand the market.

The CNC rolling machine with coarse upper roll and fine lower roll is an ideal model for coiling objects of this shape.

The advantage of this rolling machine is that it can effectively eliminate the wear of the material plate surface, thus eliminating the edge grinding process at the tip of the cone.

The theoretical balance that the CNC system can achieve is not perfect.

In fact, the accurate conical rolling is realized by the balance of torque. Accurate balance can make the material plate process a perfect taper in 5 seconds.

On the one hand, the procurement must let the supplier know all the details, including diameter, material, error, shape…

For example, in the pressure vessel industry, there are often requirements that the roundness error in the diameter direction is less than 1% or no defects.

Sometimes the power of the plate bending machine is too high, otherwise the cylinder phenomenon will occur, which will directly lead to unqualified products and seriously affect the enterprise benefits.

On the other hand, the manufacturer of the rolling machine must take into account all the special needs of the buyer.

And the purchaser must also find a manufacturer who is willing to sit down with you and discuss details one by one.

Many details are very important, but they are often ignored by buyers. At this time, the responsible manufacturer must confirm these details.

3. Choose according to the best conditions

Enterprises often need to determine what materials and thickness can make them achieve the best benefits.

Therefore, the plate bending machine manufacturers should also design and manufacture the corresponding plate bending machines according to these parameters, which can not only save a lot of time, but also greatly reduce the rework rate.

According to experience, the high-end bending machine generally works at 50% of the full load to achieve the best benefit.

For example, the plate rolling machine that can roll 10mm thick plate has the highest benefit when rolling 5mm plate.

A big problem in plate rolling is that there is a problem with the size of the material plate.

In addition to this problem, most of the problems focus on the pressure between the lower roll and the upper roll.

If a plate rolling machine capable of rolling 10mm grade plates rolls 6mm plates, certain cylindrical distortion will also occur.

But this often leads to trouble.

The biggest trouble is when the plate thickness reaches the limit of the roll bending machine. Unless gaskets are used, the whole machine can only be disposed of.

On the contrary, when designing a plate bending machine with large plate thickness to roll thin material plates, the strength of the material plates in the middle is higher than that around them.

Thus, the hourglass deformation cannot be corrected unless shims are used.

4. Carefully consider the thickness and diameter of the coil

The smaller the diameter, the greater the rolling pressure required. When the inner diameter of the thick plate is very small, the designer should pay attention to the position of the upper roll and the structure of the plate bending machine, because these two factors are important factors affecting the opening size.

The designed maximum winding circle diameter of almost all bending machines is 1.5 times that of the upper roll.

In this way, the maximum inner diameter that a 50mm upper roll can roll is 75mm.

Now there is a new technology, which can make nearly half of the material plate under pressure during the bending process, so that the maximum design bending diameter can reach 1.1 times of the old method, and the effective diameter range can be increased by 30%.

Please remember that the range of the best precision rolling that all the plate bending machines can achieve is half of the design standard.

5. Coordination of horizontal and vertical support forces

For the designer of the plate bending machine, the supporting force of the material plate to be considered mainly has two directions: horizontal direction and vertical direction.

The advantage of taking this into account is that the workload of two people can be completed by one person, thus saving valuable labor.

When rolling cylindrical products, it should be noted that if the diameter is greater than 200 times the plate thickness, the plate will bend due to its own weight.

The ideal diameter cannot be obtained without support. If you buy a plate bending machine with material plate support function, these problems will be solved.

However, in order to reduce costs, some manufacturers often use forklifts and cranes as supports, but this approach is often useless and will limit the scope of application of the equipment.

Many purchases tend to ignore some key factors, which eventually leads to the purchased equipment not meeting the requirements, resulting in many problems for the production department.

Need a price quote? Any questions?

Send us a message to let us know your deailed requirement.

Leave a Comment

Your email address will not be published.

Scroll to Top