Conditions that ensure rolled on abbreviated tolerances (recommendations). Unreasonable, strong -willed reduction in rental tolerance can cause an increase in the excretion, overruning of metal in rolling workshops, as well as a decrease in machine performance.
Without eliminating the main reasons that negatively affect the accuracy of rolling, one cannot expect significant saving of metal from reducing tolerances. These reasons include the following: the use of lace of insufficient stiffness, the absence of automatic control of the loop on continuous camps, insufficient heating capacities, low level of mechanization and automation on camps, etc. D. When working on outdated equipment, the accuracy of rolling cannot be significantly increased.
To increase the accuracy of rolling, it is necessary to install new equipment and improve production technology, namely:
1. Instead of existing strokes that have low stiffness, it is necessary to install preliminary tense taps with the exact mechanisms of tank tuning and universal spindles instead. Install where it is necessary, ticks with a vertical location of the rolls. When rolling beam and other profiles, use universal final cells.
2. Introduce automatic regulation of the loop between the cages of final continuous groups. Prevent rolled with tension of the strip on continuous camps, especially in front of the final cage.
3. On finishing and pre -lane strokes, the maximum use of wear -resistant rolls. The use of cast -iron rolls with cast streams on the final streams of large -grade mills, as well as rolls of high -grown cast iron will reduce the amount of restructuring the camp and increase the accuracy of rolling.