Rolling Cycle Computation based on Average Extension Coefficient
Rolling is an important part of the metal forming process. Rolling is a metalworking process that involves passing metal through rollers to reduce its size and shape it. The number of passes is known as the rolling cycle. This number is determined by the desired size of the product and the average extension coefficient.
The average extension coefficient is the measure of how much the metal stretches or elongates per pass when rolled. The higher the extension coefficient, the fewer passes are required to achieve the desired size. It is also important to note that the extension coefficient can also be influenced by the speed at which the rolling is done and the type of metal being rolled.
To accurately determine the rolling cycle, the average extension coefficient must first be calculated. The formula for calculating the average extension coefficient is simple: the ratio of rolling speed to the size of the mill. The rolling speed is measured in feet per minute and the size of the rolling mill is measured in inches. From these measurements, the extension coefficient is calculated in millimeters per second (mm/sec).
Once the average extension coefficient is known, the hollowing rolling cycle can be computed. This is done by dividing the desired size by the extension coefficient. For example, if the desired size is 20 mm and the average extension coefficient is 0.120 mm/sec, then the rolling cycle is 20/0.120, or 166.67. This would mean that the product should pass through the rollers 167 times in order to achieve the desired size.
It is important to note that the type of metal being rolled can affect the average extension coefficient and, consequently, the rolling cycle. Additionally, if the rolling speed or the size of the rolling mill is changed, this can affect the average extension coefficient and, depending on the change, potentially increase or decrease the rolling cycle.
It is also important to note that this calculation is based on the average extension coefficient, which is an average of the extension coefficients at various points along the metal. If a rolling cycle is computed and implemented with different extension coefficients at different points, it may not yield the desired size of product. Continuous calculations, as well as constant monitoring of the extension coefficients at various points, is necessary to ensure the desired size of the product is achieved.
In summary, the rolling cycle is determined by the desired size of the product and the average extension coefficient. The average extension coefficient is calculated by the ratio of the rolling speed to the size of the mill. Once this coefficient is known, the rolling cycle can be computed by division of the desired size by the extension coefficient. It is important to note, however, that the type of metal, the rolling speed, and the size of the mill can affect the average extension coefficient and must be taken into account when computing the rolling cycle. Additionally, continuous calculations and monitoring of extension coefficients at various points along the metal must be done to ensure the desired size of product is achieved.
