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How to control the rolling force to optimize the rolling process?

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Keyword:rolling force, rolling process, mill rolls

Controlling rolling forces during rolling is critical to ensuring high-quality finished products and preventing equipment damage. Here are some ways to control rolling force:

How to control the rolling force to optimize the rolling process?

Adjust rolling speed

Increasing the rolling speed can reduce the rolling force, and decreasing the rolling speed can increase the rolling force. Therefore, adjusting the rolling speed helps to control the rolling force.

During the rolling process, the rolling speed can be adjusted by changing the rotation speed of the roll. This can be accomplished by varying the power input to the motor that drives the rollers, or by adjusting the transmission that connects the motor to the rollers.

To adjust the scrolling speed, the operator can increase or decrease the power input to the motor using the control panel or remote control. Alternatively, the operator can adjust the transmission to change the ratio between motor speed and roll speed. This can be done manually or using an automated system.

It is important to note that adjusting the rolling speed can affect the quality of the rolled product, so the operator should know the optimum speed for rolling a particular material. Also, adjusting too quickly can damage the roll or machinery, so changes should be made gradually and carefully.

Modified roll gap

Changing the distance between the mill rolls also affects the rolling force. Smaller gaps increase force, while larger gaps decrease force.

Roll gap is the distance between two rolls in a rolling mill. Adjusting the roll gap is an important parameter in the rolling process because it affects the thickness and quality of the rolled product. Here are some general steps for adjusting the roll gap:

Determine the required roll gap: The roll gap should be set to the desired thickness of the rolled product. This can be determined based on the material being rolled and the final specification of the product.

Check Equipment: Make sure the rolls and machinery are in good working order and there are no mechanical issues that could cause roll gap problems.

Adjust hydraulic or mechanical systems: Most rolling mills use hydraulic or mechanical systems to adjust the roll gap. Depending on the type of system used, adjustments can be made using the control panel or remote control.

Step-by-step adjustments: It is important to adjust the roll gap step-by-step to avoid damaging the rolls or the machine. Adjust the roll gap slowly and in small increments, experimenting with the rolling process after each adjustment to ensure that the rolled product is of the desired thickness and quality.

Monitor the rolling process: After adjusting the roll gap, it is important to monitor the rolling process to ensure the desired results are achieved. Make further adjustments as needed until you find the best settings.

It should be noted that the optimum roll gap setting may vary depending on the rolling material, temperature and rolling speed. Therefore, some experimentation may be required to find the optimal settings for a particular rolling process. Additionally, it is important to regularly inspect and maintain the rolls and machinery to ensure they are in good working order and to avoid potential problems with the roll gap.

Bending and shifting using mill rolls

Roll bending and shifting help control the distribution of rolling forces across the width of the material. By selectively bending or moving the rollers, you can apply more force to some areas and less force to others.

Roll bending and shifting are important parameters to be controlled during the rolling process as they affect the shape and position of the rolled product. Here are some general steps for adjusting roll bending and shifting:

Identify the problem: First, determine if there is a curl or misalignment issue. Look for any visual signs of irregularities in the shape or location of the rolled product.

Check the equipment: Make sure the rolls and machinery are in good working order and there are no mechanical issues that could cause problems.

Adjusting the roll bend: The roll bend can be adjusted by changing the roll gap, or the distance between the rolls. This can be done by adjusting hydraulic or mechanical systems that control the position of the rollers. Additionally, the bending force can be adjusted by varying the pressure or load applied to the rollers.

Adjust roll displacement: The roll displacement can be adjusted by changing the lateral position of the roll. This can be done by adjusting hydraulic or mechanical systems that control the position of the rollers. Additionally, the moving force can be adjusted by varying the pressure or load applied to the rollers.

Tests and Adjustments: After making any adjustments, test the rolling process to ensure roll bending and shifting are corrected. Make further adjustments as necessary until the desired result is achieved.

It is important to note that roll deflection and displacement are complex parameters that are affected by many factors including material properties, temperature and lubrication. Therefore, trial and error may be required to find the optimal settings for a particular material and rolling process.

Use lubricant

Lubricating the material and rolls reduces friction and thus reduces rolling forces.

Lubrication is an important aspect of the rolling process as it helps reduce friction between the rolls and the material being rolled. Here are some ways to use lubricants to reduce friction during rolling:

Applying Lubricant to the Rolls: Lubricants can be applied directly to the rolls to reduce friction between the rolls and the material being rolled. Lubricant can be applied using a spray system, brush or roller.

Apply lubricant to the material: It is also possible to apply lubricant to the material being rolled to reduce the friction between the material and the rolls. This can be done with a spray system, brush or roller.

Use the correct lubricant: It is important to use the correct type of lubricant for the material being rolled and the rolling process being used. Different types of lubricants, such as oil-based or water-based, affect the rolling process differently.

Monitoring Lubrication: It is important to monitor the amount and effectiveness of lubrication during rolling. This can be done by measuring the temperature of the roll and material and monitoring the quality and consistency of the rolled product.

Maintaining the Lubrication System: Regular maintenance of the lubrication system is important to ensure it is functioning properly and providing adequate lubrication. This includes regularly checking and changing lubricants, cleaning the system, and repairing any leaks or damage.

The use of lubricants in the rolling process to reduce friction helps to improve the quality of the rolled product, reduces wear on the rolls and increases the efficiency of the rolling process.

Control temperature

Temperature can affect rolling force by changing the properties of the material. For example, heating the material before rolling can make it more ductile and reduce the force required.

Controlling temperature during rolling is an important aspect of the process as temperature can have a significant impact on the properties and quality of the rolled product. Here are some ways to control temperature during rolling:

Monitoring Temperature: The first step in controlling temperature during rolling is to monitor the temperature of the rolls and rolled material. This can be done using temperature sensors or infrared cameras.

Adjusting the rolling speed: The rolling speed affects the temperature of the rolls and rolled material. Increasing the rolling speed is beneficial to reduce the temperature, and decreasing the rolling speed is beneficial to increase the temperature.

Adjust cooling system: cooling system, such as water spray or air jet, can be used to control the temperature of the roll and the material being rolled. Adjusting the flow rate or position of the cooling system can help regulate the temperature.

Adjust the heating system: In some cases, the heating system can be used to control the temperature of the roll and the material being rolled. This can be done using a variety of heating methods, such as induction heating or a gas stove.

Adjust lubrication: Lubrication also has an effect on the temperature during rolling. Using the correct type and amount of lubricant helps reduce friction and heat buildup.

It is important to note that optimal temperature settings may vary depending on the material being rolled, the rolling process used, and the desired characteristics of the rolled product. Therefore, some experimentation may be required to find the optimum temperature setting for a particular rolling process. Additionally, regular maintenance of equipment and cooling systems is important to ensure they are functioning properly and providing adequate temperature control.

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Rolling mill rolls product

Classification by roll material:

Cast iron mill rolls

  • Alloy indefinite chilled cast iron rolls
  • Alloy chilled cast iron rolls
  • Alloy SG ductile cast iron roll
  • Pearlitic ductile cast iron roll
  • Bainite ductile cast iron roll
  • Centrifugal cast iron roll


Cast steel mill rolls   

  • Alloy cast steel rolls
  • Semi-steel roller
  • Graphite steel rolls
  • High-chromium steel roll
  • High-speed steel roll


Forging mill rolls

Sort by position on the rolling mill:

Work rolls
backup rolls

Intermediate roll

Product advantage

The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us.

LMM high-speed steel rolls have higher steel passing per groove (times) due to their good wear resistance, which saves roll changing time, improves rolling mill operation rate, reduces roll consumption, and improve the overall efficiency of the factory.
Generally, the amount of steel passing in a single groove (times) is 3 to 5 times that of cast iron rolls.

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