Various small problems may occur during slitting line machine processing. When we encounter these problems, we have to know what to do. We must master relevant professional knowledge. Today, we will talk about the reasons and countermeasures for soft coils when the slitting line machine is processed. If you are interested, read on.

1. Soft rolls

When the coiled steel coil is withdrawn from the winder shaft, the slack of the steel coil will cause an oval soft coil phenomenon.

2. Uneven coiling

The telescope-like failure of the coiled steel coil due to coiling misalignment is called uneven coiling. The reasons and dislocation shapes are as follows:

① Uneven winding caused by insufficient tension

If the tension is weak at the beginning of the winding, dislocation will easily occur at the end of the winding. So the tension should be increased at the beginning. The larger the roll, the lower the tension. Such an operation method can effectively prevent the occurrence of dislocation.

② Dislocation caused by unbalanced winding tension

The straight angle of the head of the steel coil is poor when it is cut, the right angle is poor when it is engaged, the width of the uncoiler after the plate is not set correctly, and the steel plate is sent out after the slitting line machine is cut. The length of the two sides of the steel coil when the side guide makes a large movement It will be different. The short side is easy to produce tension changes. Therefore, when winding the steel coil on the expansion and contraction drum of the winder, first confirm that the entire width direction of the steel coil is accurately and closely attached to the expansion and contraction drum, and then the coiling can be started.

③ Dislocation caused by poor bite position of the jaws in the expansion and contraction drum of the winder

When the position of the knife, the middle divider, and the occlusal position in the jaws of the expansion and contraction drum of the winder are inconsistent, the coiling misalignment will be caused by the change of the left and right tension of the steel coil.

④ Coiling misalignment caused by the left and right swing of the steel belt in the looper

The swinging of the steel belt in the looper will cause the angle of entering the tension device to change, which will cause coiling misalignment. Use felt and other soft materials to press on the steel belt to prevent the steel belt from swinging.

⑤ Coiling dislocation caused by the stoppage of the slitting line machine production line

When the slitting line machine production line is stopped or started, the tension between the tension device and the winder will be reduced, and the contact pressure between the steel strips will be reduced, which is prone to lateral misalignment, and then coiling misalignment. Therefore, the flexible use of winders and dividers can effectively prevent winding misalignment.

⑥ Winding misalignment caused by poor divider width setting

The general divider width setting is: finished width and thickness. If it is too wide, the steel plate will move left and right, and the coiling will be dislocated.

3. Arched inner diameter

When coiling, even if there is no abnormal coiling, when the steel coil is withdrawn from the winder, the expansion and contraction drum shrinks, and the expansion part and nearby parts of the expansion and contraction drum will suddenly cause inner diameter arching. The following thin plates are more likely to occur. It also happens when paper tubes and boots are used. In addition, the temperature rise of the steel coil during coiling is also worth noting. The cause of arching is excessive winding tension.

Bangzhou Machinery is focused on the slitting line machine steel coil slitting machine and other kinds plates processing machines.We gained the great reputations in the field of cold rolled steel and there are many new machines exported to Southeast Asia, Europe, Latin America and Africa. Welcome to contact with us!