The use of rolling mill once there is deviation, it will endanger the processed product, resulting in unusable products, as well as endanger work efficiency and product cost. So how to reduce or eliminate the application deviation of the rolling mill to deal with this situation?
Immediately reduce the application deviation is an effective method to select excellent processing technology and mechanical equipment. After selecting the processing technology and mechanical equipment, in the manufacturing process, to reasonably improve the precision of production and processing, after identifying the initial deviation factors that harm the production and processing accuracy, every method discovered should be immediately eliminated or reduced.
Do a good job of inspection. Generally speaking, if the grinding tool used in rolling mill is damaged and causes deviation, the grinding tool can be replaced. In the whole process of equipment inspection, check the flatness of the guide rail slider and the console, and keep the flatness within the allowed range.
If the rolling mill still has a deviation, this will be a flatness problem. This is because the balance mechanism cannot ensure that the working pressure oil evenly enters the upper and lower hydraulic cylinders of the equipment hydraulic transmission system, so adjustment is necessary. Adjust the working mode of the equipment to the appropriate state, then take out the grinding tool in the equipment, the guide rail slider can stay on the mechanical equipment, and then adjust the pressure gauge to the necessary working pressure value.
Under certain friction conditions, the wear process of three-roll rolling mill can be divided into three stages: running-in stage, stable wear stage and severe wear stage. The wear process is an unstable stage. During the whole working time, the wear rate is very small, the wear rate is higher, but it decreases with the extension of the working time. The stable wear period is the longest, with slow speed and stable wear characteristics. The intense wear period is a stage with a sharp increase in wear rate. For the rollers of the three-roll rolling mill, severe stress concentration is prone to cause roller fracture.
For three-roll rolling mill, running-in has important significance for its work efficiency and service life. Grinding can make the surface of the machine body form an elastic contact state, thereby providing the minimum and stable friction force value. Stable roughness has nothing to do with the original roughness, but is related to the wear conditions, which is an important law of running-in. The grinding results are affected by factors such as material load, speed, and mechanical and physical properties, but as long as the critical pressure is not exceeded, maintaining elastic contact is the best.
