Precautions of Cold Rolling Mill

1. Preparation for Startup

Let the rolling mill equipment idle for about 10 minutes. During this period, observe whether the device is running normally, and add lubricating oil and rolling oil to lubricate the equipment properly according to the regulations.

2. Precautions before Unloading

(1) The press should be raised to the specified position, the reel should be retracted into position, and the hydraulic truck should be prepared in advance for auxiliary discharge.

(2) The aluminum plate plug should be inserted into the jaws successfully, otherwise, it will be difficult to insert.

3. Some Considerations

(1) The time for each jog of the machine should not exceed one second. The turbine should be adjusted to reduce the turbine. The adjustment amount on both sides should be equal to avoid the side bend of the rolled piece.

(2) When the cold rolling mill is running, someone should be responsible for guarding to prevent problems.

(3) Generally speaking, the thickness of one rolling of a single cold rolling mill should not exceed 40% of the aluminum plate.

(4) There should be no debris in the production line.

(5) Appropriate adjustments should be made to the pass and reduction depending on the material of the incoming material and the capacity of the rolling mill.

(6) The use of cold rolling mills should meet the requirements of the main technical parameters and should not be overloaded.

(7) The mill roll should not have serious wear and should be replaced if necessary.

(8) In the rolling process, if the wear of the mill roll has affected the surface quality and dimensional accuracy of the rolled piece, the roll should be changed immediately. After changing the roller, it should idle for 2 to 3 minutes.

(9) If there is any phenomenon such as tearing or skewing of the rolled piece, the hand can not be used. It should be stopped first and then taken out.

(10) Rolled finished products or semi-finished products should be filled out with relevant records and stacked in batches.

How to Improve the Operation Efficiency of High-speed Rolling Mill?

High-speed rolling mill is similar to the conventional rolling mill. The ultimate goal is to obtain the required size of the rolled piece by rolling mill calendering. In rolling operation, in order to improve the operation efficiency of the high-speed rolling mill, it is necessary to take corresponding improvement measures.

       

The operation efficiency of high-speed rolling mill is mostly affected by unplanned parking, other equipment delays, roll and bearing replacement, and other process maintenance. Therefore, we need to improve the operation efficiency of the high-speed rolling mill in a planned way. The specific operations are as follows:

1. The material of rolls should be screened according to the requirements of the rolled parts to improve the fatigue strength and service life of the rolls. 

2. Inspect the wear of roll and guide from time to time.

3. Inverse injection process of bearing lubricant from inside to outside to inside, so as to reduce the pollution of dust to bearing.

4. Using ultrasonic technology to inspect and analyze rolls.

5. The dry lubricating oil point has been modified. At present, the dry oil is added from the high-pressure zone. The amount of added oil increases from six cycles of raw materials to eleven cycles, and the thin oil lubrication is a 15-minute cycle. The cumulative effect of these changes can reduce the bearing temperature by several degrees Celsius.

With the upgrading of the steel rolling industry, new problems will arise, and we need to optimize and adjust the rolling process according to the actual situation at any time. This process requires us to explore step by step for a long time.

If you are interested in our rolling mill machine, please feel free to mail at marketing2@hanrm.com, we will make the customized solution for you.