Online Replacement and Installation of Rolling Mill
Before changing rolls, check whether the online rolls are the rolls of the changed sorts, rolling varieties, and specifications; Scrub each sideways, roll flat head and inner hole of the sleeve, and apply clean grease after scrubbing.
After the preparation work is completed, the rack can be replaced according to the roll replacement plan, and its working steps are as follows:
1. Turn off the cooling water of the rolling mill and dismantle the inlet and outlet guides.
2. Remove the water pipe joints of the upper and lower rolls.
3. Activate the hydraulic locking device for opening the rack.
4. Horizontal stand select “stand traversal” to advance the stand and move the rolling mill to the limit position on the operating side. (The vertical mill selects the “stand up/down” button to lower the stand and lower the mill to the lower limit position.)
5. Pull out the fixing pin of the flat headset bracket wrench and pull the bracket wrench to separate the flat head of the frame from the flat headset bracket.
6. Pull the “rack traversal” button of the horizontal rolling mill, Make the flat headcover bracket back, disengage the flat headcover from the roll flat head, and move the flat headcover bracket to the limit position on the transmission side (pull the vertical rolling mill button to raise the flat headcover bracket, disengage the flat headcover from the roll flat head, lift the flat headcover bracket to the limit position on the transmission side, and then pull the “stand traverse” button to move the vertical rolling mill to the outer limit position).
7. Lift the frame from the rolling line by crown block. Put the whole new roll frame on the sliding roll, and rotate the roll with the skid rod, so that the position of the flat head of the roll is consistent with that of the flat head of the rotating shaft.
8. After confirming that the mill stand is aligned with the rolling line, pull the “stand traverse” button of the horizontal rolling mill to make the flat headset bracket traverse to the operating side (pull the “stand traverse” button of the vertical rolling mill to make the stand retreat and move the vertical rolling mill to the inner limit position.
9. Pull the “Stand Lift/Lower” button of the vertical mill to lower the flat head bracket). Make the roll flat head enter the drive shaft flathead until it reaches the limit position.
10. Start the locking device to lock the rack and connect the water pipe joint. Install the guide guard. And the roll gap and guide of the rolling mill are finely adjusted.