When purchasing a plate rolling machine, considering the hardness rating of the outer roll surfaces is crucial. As materials and cutting techniques become harder and more advanced, it is essential to ensure that the rolling equipment can withstand the increased demands. The hardness rating of the outer roll surface plays a significant role in protecting the rolls and ensuring their longevity.
5 features for the hardness of plate rolling machine rolls
The hardness requirements of the surface of the plate rolling machine rolls are usually determined based on specific applications and manufacturing standards. The following are the typical hardness requirements for the surface of plate rolling machine rolls and some common hardness standards:
- Hardness Range: The surface hardness of plate rolling machine rollers is generally required to be within a certain range to ensure sufficient wear resistance and compressive strength under working conditions.
- Prevent Scratching: The hardness of the roll surface should be high enough to prevent scratching when materials come into contact with the rolls or other surfaces.
- Wear Resistance: The surface hardness of the rolls should be sufficient to prevent excessive surface wear due to continuous friction.
- Strength Requirements: There is a certain relationship between hardness and strength of the rolls. The hardness of the roll surface should be satisfied without reducing the overall strength of the rolls.
- Manufacturing Standards: The manufacturing standards of plate rolling machine rollers (such as international standards, industry standards, or custom requirements from customers) may have specific regulations regarding the hardness of the roll surface.
Hardness requirements are generally specified during the design and manufacturing of plate rolling machine rollers. These requirements are typically determined by the manufacturers based on specific applications and customer needs to ensure the quality and performance of the plate rolling machine rollers meet the expected requirements.
Common materials, hardness, and implementation standards for plate rolling machine rollers in China
- Upper Roller: Material 42CrMo, according to JB/ZG4289-86 Roll Steel Standard, quenched and tempered hardness HB260-300, surface induction-hardened HRC42-50.
- Lower Rollrt: Material alloy steel, quenched and tempered hardness HB260-300, surface induction-hardened HRC42-50.
- Guide(Supporting) Roller: Material 45# steel, quenched and tempered hardness HB190-220. The surface hardness of the supporting roller is lower than that of the lower roll, and the supporting roll’s surface has spiral grooves to prevent damage to the working rolls caused by welding slag, oxide scale, or impurities between the rolls.
The Hardness Rating of Outer Roll Surfaces: Key Considerations
The hardness rating of the outer roll surfaces is a critical factor to consider when evaluating plate rolling machines. Here are some key considerations related to hardness rating:
Increased Material Hardness
Modern materials, such as high-strength alloys and hardened steels, have become more prevalent in various industries. These materials are often used in conjunction with advanced cutting techniques, such as laser or plasma cutting, which produce precise and durable components. As these materials and cutting techniques advance, the rolling equipment must adapt to accommodate their hardness. The hardness rating of the outer roll surfaces directly impacts their ability to withstand the demanding rolling process.
Protection Against Wear
The hardness rating of the outer roll surfaces provides protection against wear caused by the rolling process. Harder roll surfaces are less prone to damage and wear, ensuring the longevity of the machine and maintaining its performance over time. A hardness rating of 50 to 55 Rockwell C scale is generally considered to have a reasonable penetration depth and offer long-lasting protection against roll surface wearing.
Compatibility with Modern Materials
The hardness rating of the outer roll surfaces should be compatible with the hardness of the materials being rolled. If the outer roll surfaces are too soft compared to the material’s hardness, they may be prone to premature wear or damage. It is crucial to select a plate rolling machine with outer roll surfaces that are sufficiently hard to withstand the specific materials you will be working with, ensuring optimal performance and durability.
Consultation with Manufacturer
To ensure that the hardness rating of the outer roll surfaces aligns with your specific needs, it is recommended to consult with the manufacturer or supplier. They can provide insights into the appropriate hardness rating based on the materials and cutting techniques you will be working with. Their expertise will help you select a plate rolling machine with outer roll surfaces that can withstand the demands of your fabrication process.
Conclusion
Considering the hardness rating of the outer roll surfaces is crucial when purchasing a plate rolling machine. As materials and cutting techniques evolve, the rolling equipment must adapt to accommodate increased hardness. The hardness rating directly impacts the protection against wear and the overall longevity of the machine. By evaluating the compatibility with modern materials, consulting with the manufacturer, and selecting a machine with an appropriate hardness rating, you can ensure the durability and performance of the plate rolling machine in your fabrication process.
In summary, the hardness rating of the outer roll surfaces is a key factor in selecting a plate rolling machine. It ensures the machine’s ability to withstand the demands of forming modern, hard materials and protects against wear. By considering the increased material hardness, the need for protection against wear, and consulting with the manufacturer, you can make an informed decision and invest in a plate rolling machine that offers long-lasting performance and durability.