Steel Heaping Solution

During wire rod production, sometimes steel piece maybe be piled up, the following is listed possible reasons and corresponding solution.    

When there is steel heaped at the head of rolled piece, possible Reasons as following:

1. The friction force of roller groove is too small to lead to the head of work piece sliding;

2. The head of the workpiece upwarps after leaving the stand;

3. Rolling groove or guide groove has sundries;

4. Billet is unable to enter the mill;

5. Billet pushes out the guide or twines roller;  

Solution:

1. To increase friction of the roller groove when the roller or the groove is replaced, grinding the groove with a grinding machine or using a spot welding method;

2. Timely check whether the base of guide is loose and rolling line shall be centering, replace the worn guide in time;

3. During operation, oxide-scale shall be removed timely;

4. Unqualified billet shall be rejected, it should be emergence stop as early as possible once the billet forks. Or maybe a lot of time will be delayed.  

When the heaping steel is in the middle or tail of rolled piece, possible reasons as below:

1. Roller gap is set inappropriately;

2. The billet has defects like inclusion and bubble to cause break at rolling;

3. Rolling Speed design is improper;

4. A sudden speed increase or decrease of the motor causes steel heaping;  

5. Rollers sudden fracture or guides of front passes serious damage caused steel heaping;

Solutions:

1. Correct measures roller diameter and speed to reduce error of speed;

2. Strictly inspect the quality of the billet;

3. Correctly regulate the tension among stands;

4. Inspect electrical apparatus and replace damaged components;

5. Regulation steel temperature and check quantity of cooling water, not allow to roll low temperature steel and black head steel;

Steel heaping occurs among stands of finishing mills.

Related reasons:

1. The guide wheel doesn’t work or the bearing is burned out;

2. Rolled pieces are forked;

3. Install guide or roller ring wrongly;

4. Not to set proper gap or work piece has improper size;

5. Roller rings are broken;

Solutions:

1. Replace the guide and ensure its correct installation;

2. Inspect the billet or prolong length of the cutting head;

3. Recheck and adjust the gap;

4. Replace the roller ring and meanwhile inspect the cooling pipes;