Hot rolling draft refers to the reduction in thickness or size of a metal or alloy during the hot rolling process. It is the amount by which the initial thickness is decreased as the material passes through the rolling mill. The hot rolling draft plays a crucial role in shaping the final product’s dimensions and properties. By applying pressure and heat, the metal undergoes plastic deformation, resulting in a thinner and longer product. The hot rolling draft also helps improve the material’s homogeneity and eliminate any surface defects, enhancing its overall quality. Hot rolling draft is carefully calculated and controlled to achieve the desired product specifications.
To calculate the hot rolling draft, you need to measure several factors. First, determine the initial thickness of the metal sheet or strip. Then, measure the final desired thickness. Next, calculate the difference between these two values. This difference represents the draft amount. Additionally, consider the reduction in thickness that occurs during the rolling process. This reduction is typically expressed as a percentage. Multiply the draft amount by this reduction percentage to determine the final hot rolling draft. It is important to note that the hot rolling draft can vary based on various factors such as the type of material, the rolling temperature, and the required properties of the final product. Therefore, it is crucial to consider these factors and make adjustments accordingly.
