What are the main effects of the roll surface roughness of cold rolling rolls on rolled products?
The impact of the roll surface roughness of the cold rolling roll on the rolled products is mainly reflected in the following aspects:
1. Surface quality: Roller surface roughness is an important factor affecting the surface quality of rolled products. If the roll surface roughness is too large, it will cause unevenness, scratches and other quality problems on the surface of the rolled product, thus affecting the appearance and performance of the product. Specifically, when the roll roughness is large, it is easy to produce thin cracks on the surface of the plate. These cracks will cause the surface quality of the material to deteriorate and destroy the integrity of the material.
2. Rolling force: Roller surface roughness will increase friction during rolling, thereby increasing rolling force. This affects the production efficiency of the rolling mill and may increase production costs.
3. Product thickness and plate shape: Roller surface roughness will also affect the thickness and plate shape of rolled products. If the roll surface roughness is uneven, it will lead to uneven thickness and poor plate shape of the rolled product, thus affecting the quality and use effect of the product.
4. Roll life: Similar to hot rolls, the surface roughness of cold rolls will also affect their service life. Excessive roughness will accelerate the wear and fatigue damage of the roll and shorten its service life.
In addition, it is worth noting that under lubricated rolling conditions, the impact of roll surface roughness on the surface quality of aluminum will be restricted by the thickness and state of the oil film between the rolled piece and the roll. Therefore, when selecting cold rolling rolls, it is necessary to select appropriate roll surface roughness based on actual rolling needs and product quality requirements to ensure that production needs can be met and product quality can be guaranteed. At the same time, the cold rolls also need to be inspected and maintained regularly to ensure their normal operation and extend their service life.