The rolling characteristics of steel ingots on the blooming mill are that the rolled piece is rolled back and forth, the rollers rotate forward and reverse, and the roller speed changes continuously as the rolled piece bites, rolls, and is thrown out. This law that the roll speed changes with the rolling passes and with the rolling process in each pass is called the speed system of the blooming mill, as shown in Figure 1.
Figure 1 The speed system of the blooming dh2f cnc milling edm slow wire plastic mold inserts. In Figure 1, n1 is the roll speed when the workpiece bites in, n is the maximum roll speed during rolling, n2 is the roll speed when the workpiece is thrown out, and T1 represents the pure rolling speed of this pass. time. Similarly, n’1 is the roll speed when the next rolling piece bites in, n’ is the maximum roll speed when the next rolling piece is rolled, n’2 is the roll speed when the next rolling piece is thrown out, and T2 represents the pass. pure rolling time. T3 is the gap time between adjacent passes.
Various types of blooming mills have different speed systems (such as trapezoidal speed systems) due to different process equipment conditions. However, the purpose of studying the speed system of blooming mills is to shorten the rolling rhythm as much as possible, thereby increasing the output of the blooming mill.