Operation control requirements of cold rolling mill for packaging steel strip
by：Hongmei
2021-03-15
Operation control requirements of cold rolling mill for packaging steel strip
For the safe, efficient, and high-speed operation of the rolling mill, a batch of sequence controls are set up to automatically operate the rolling mill, which includes automatic acceleration, deceleration, automatic shutdown, and includes Control, and coordinated control of the speed of the entire production line.
If the main control function of cold tandem rolling-automatic position/pressure control, main speed cascade, automatic thickness control, automatic flatness control and other functions are collectively called operation control, then operation control includes the following two types of functions:
(1) Speed u200bu200bcontrol related to the automatic operation control of the rolling mill.
(2) Speed u200bu200bcontrol related to manual operation.
The speed control of the looper section, the looper trolley control, the looper exit section speed control, the automatic deceleration of the welding seam, and the automatic acceleration, automatic deceleration and automatic stop of the cold tandem rolling control. The second category includes various operations such as raising speed, constant speed, lowering speed, threading, tail flicking, emergency stop, welding seam and calibration performed by the operator. The switching modes of various operating states are shown in Figure 2-4. Shown. Table 2-5 lists the speed control options in different operating states.
The following describes the looper population and the speed control of the exit section with full continuous cold rolling as the object.
In order to keep the tandem cold rolling mill rolling at a high speed and steady speed, full continuous cold rolling requires a looper with a certain capacity at the entrance of the tandem mill, and a welding machine and other equipment at the looper population. Continuously supply raw strip steel. In order to reduce the length of the looper area, the entire looper is divided into three layers, upper, middle and lower. Each layer is equipped with looper trolleys to pull the strip steel (the looper trolley is pulled by a wire rope). When the looper area is 120m long , It can store 720m of strip steel.
For the safe, efficient, and high-speed operation of the rolling mill, a batch of sequence controls are set up to automatically operate the rolling mill, which includes automatic acceleration, deceleration, automatic shutdown, and includes Control, and coordinated control of the speed of the entire production line.
If the main control function of cold tandem rolling-automatic position/pressure control, main speed cascade, automatic thickness control, automatic flatness control and other functions are collectively called operation control, then operation control includes the following two types of functions:
(1) Speed u200bu200bcontrol related to the automatic operation control of the rolling mill.
(2) Speed u200bu200bcontrol related to manual operation.
The speed control of the looper section, the looper trolley control, the looper exit section speed control, the automatic deceleration of the welding seam, and the automatic acceleration, automatic deceleration and automatic stop of the cold tandem rolling control. The second category includes various operations such as raising speed, constant speed, lowering speed, threading, tail flicking, emergency stop, welding seam and calibration performed by the operator. The switching modes of various operating states are shown in Figure 2-4. Shown. Table 2-5 lists the speed control options in different operating states.
The following describes the looper population and the speed control of the exit section with full continuous cold rolling as the object.
In order to keep the tandem cold rolling mill rolling at a high speed and steady speed, full continuous cold rolling requires a looper with a certain capacity at the entrance of the tandem mill, and a welding machine and other equipment at the looper population. Continuously supply raw strip steel. In order to reduce the length of the looper area, the entire looper is divided into three layers, upper, middle and lower. Each layer is equipped with looper trolleys to pull the strip steel (the looper trolley is pulled by a wire rope). When the looper area is 120m long , It can store 720m of strip steel.
