Advantages of cast iron rolls


Time:

2022/03/16

Cast iron rolls are subjected to high rolling loads at work, and bending, torsion and friction often occur between cast iron rolls. After using for a certain period of time, the surface needs to be polished to remove defects such as surface pits, roll marks, cracks, etc., and gradually remove the fatigue layer while repairing the roll shape. The material of the roller is a polymer composed of iron-based solid solution and alloy carbide. At present, Cr5 rollers are widely used, and the single grinding amount is 0.2-0.3mm. If the small and medium-sized centrifugal rollers cannot be meshed at one time, the grinding amount will exceed 0.1mm after processing.

cast iron rollAt work, it will bear high rolling load, and bending, torsion and friction often occur between cast iron rolls. After using for a certain period of time, the surface needs to be polished to remove defects such as surface pits, roll marks, cracks, etc., and gradually remove the fatigue layer while repairing the roll shape. The material of the roller is a polymer composed of iron-based solid solution and alloy carbide. At present, Cr5 rollers are widely used, and the single grinding amount is 0.2-0.3mm. If the small and medium-sized centrifugal rollers cannot be meshed at one time, the grinding amount will exceed 0.1mm after processing.

铸铁轧辊的优点

In addition to the mechanical equipment of the grinding machine, the key media and consumables for grinding cast iron rolls are metal cutting fluids and grinding wheels. With the improvement of surface quality, higher requirements are put forward for metal cutting fluids and grinding wheels. Metal Cutting Fluid Demand

cast iron rollIt has good chip sedimentation, excellent cooling and cleanliness, and reduces scratches on the roller surface. Select the appropriate grinding wheel type and grinding process parameters to ensure roll profile problems, surface vibration patterns, transverse thread patterns, surface scratches, etc. does not occur during the grinding process. For small and medium-sized centrifugal rolls, corundum grinding wheels are generally used. According to the material matching of small and medium-sized centrifugal rolls corundum grinding wheels, higher surface quality and grinding accuracy can be achieved. Roller type problems are usually mainly caused by the grinding wheel is too soft.

cast iron rollThere may be roller surface vibration defects such as too hard grinding wheel or too high feed speed and traverse speed, which need to be solved by reducing the linear speed of the grinding wheel, reducing the feed speed, reducing the traverse speed and increasing the roller speed. When the grinding wheel is not calibrated properly or the feed speed and lateral movement speed are too high, lateral threading will appear, also known as the feed mode. When the grinding wheel is too soft, the coolant filter fails, and there are abrasive particles floating in the coolant, it will cause the grinding point defects on the surface of the small and medium centrifugal roller. It is necessary to check the cast iron roll coolant filter, increase the grinding wheel speed, reduce the roll speed, and reduce the feed speed. The grinding wheel is too hard, the self-sharpness is poor, the passivated sand particles are not easy to fall off, and the surface of the grinding roller is easy to scratch. It is necessary to increase the speed of the grinding roller and reduce the linear speed of the grinding wheel.