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6 common causes of high temperatures and how to deal with them

4 roll bending machine

Four-roller plate rolling machines are crucial pieces of equipment in various industries, particularly in metal fabrication and construction. These machines play a vital role in bending and shaping metal plates into desired forms. However, one common issue that operators encounter is the excessive heating of the machine during operation. High temperatures can lead to various problems, including reduced machine lifespan and suboptimal product quality.

6 common causes of high temperatures and how to deal with them

It is necessary to understand the reasons why the temperature of the four-roller plate bending machine is too high and to provide guidance on how to correctly deal with this problem.

6 reasons for high temperature of four-roller plate rolling machine

Before addressing the problem of high temperatures, it’s essential to understand the underlying causes. High temperatures in four-roller plate rolling machines can result from several factors:

1. Excessive Workload

  • Cause: Overloading the machine beyond its capacity can lead to excessive friction and heat generation.
  • Solution: Ensure that the workload matches the machine’s specifications and capacity to prevent overheating.

2. Inadequate Lubrication

  • Cause: Friction between moving parts can cause heat buildup when lubrication is insufficient or has degraded.
  • Solution: Regularly lubricate all critical components and ensure the use of the appropriate lubricants.

3. Misalignment

  • Cause: If the rollers are misaligned or not parallel, it can cause uneven stress and heat generation.
  • Solution: Periodically check and realign the rollers to ensure proper contact and distribution of force.

4. Material Properties

  • Cause: Certain materials, like hardened steel, can generate more heat during the bending process due to their high tensile strength.
  • Solution: Adjust the rolling parameters, such as speed and pressure, to accommodate the material’s properties.

5. Overheated Hydraulic System

  • Cause: A malfunctioning or overworked hydraulic system can lead to excessive heat in the machine.
  • Solution: Inspect the hydraulic system, maintain it regularly, and replace any damaged components.

6. Incorrect Bending Parameters

  • Cause: Using incorrect parameters, such as inappropriate roller pressure or speed, can generate excess heat.
  • Solution: Consult the machine’s manual or an expert to set the correct parameters for the specific material and task.
3 roll bending machine

Dealing with High Temperatures

Addressing high temperatures in a 4-roll plate rolling machine requires a systematic approach. Here’s a step-by-step guide on how to correctly deal with this issue:

1. Monitor Temperature

Temperature Monitoring PointsRecommended Temperature Range
Rollers and Bearings40°C – 60°C
Hydraulic System30°C – 50°C
Machine SurfaceBelow 50°C
Recommended temperature ranges for critical points in the machine. Regularly check and record temperatures during operation.

2. Reduce Workload

  • Assessment: Ensure that the machine is not being overloaded beyond its specified capacity.
  • Action: Reduce the material thickness or length to match the machine’s capacity or consider dividing the task into smaller segments.

3. Improve Lubrication

  • Assessment: Check the lubrication system for any issues or degradation.
  • Action: Lubricate all moving parts using high-quality lubricants at recommended intervals. Replace worn-out or damaged lubrication components.

4. Align Rollers

  • Assessment: Inspect the alignment of the rollers to ensure they are parallel and properly adjusted.
  • Action: If misalignment is detected, recalibrate the rollers to ensure even pressure distribution during bending.

5. Adjust Rolling Parameters

  • Assessment: Review the rolling parameters, such as pressure, speed, and material thickness, for the specific task.
  • Action: Consult the machine’s manual or seek expert advice to set the appropriate parameters that reduce heat generation.

6. Evaluate Material Properties

  • Assessment: Consider the material being processed and its properties, especially tensile strength.
  • Action: Modify the machine’s settings to match the material’s characteristics, optimizing the process while minimizing excessive heat generation.

7. Hydraulic System Inspection

  • Assessment: Check the hydraulic system for any malfunctions, leaks, or overuse.
  • Action: Regularly inspect and maintain the hydraulic system. Replace any damaged components to ensure its proper functioning.

Cool the Machine

Cooling MethodsBenefits
Forced Air CoolingEffective in reducing surface and roller temperatures.
Coolant SystemsIdeal for continuous cooling of hydraulic components.
Thermal Insulation and ShieldsPrevents heat transfer to adjacent machine parts.
Various cooling methods and their benefits for reducing machine temperatures.

9. Preventive Maintenance

  • Action: Implement a regular maintenance schedule that includes lubrication, alignment checks, and inspections. This proactive approach can help prevent temperature-related issues.

10. Consult Experts

  • Action: If temperature issues persist, consult with machine experts or manufacturers for specialized guidance and solutions tailored to your specific machine and application.


High temperatures in four-roller plate rolling machines can be detrimental to both the machine’s longevity and the quality of the finished products. Understanding the causes and taking the appropriate corrective actions, as outlined in this guide, is essential for ensuring the efficient and safe operation of these machines. Regular monitoring, maintenance, and adherence to recommended procedures are key to mitigating high temperatures and optimizing the performance of four-roller plate rolling machines.