The reason for wrong layer problem of JIS G3101 SS400 hot rolled steel strips

The wrong layer problem of JIS G3101 SS400 hot rolled steel strips is a long-term challenge to continuous casting and rolling mills. The wrong layer problem brings inconvenience to bundling, marking and transportation of JIS G3101 SS400 hot rolled steel strips and coils. Meanwhile, it makes originally qualified SS400 steel strips become defective after coiling and causes losses.

The main reasons for wrong layer problem of JIS G3101 SS400 hot rolled steel strips are:
1) The side guide plate is badly worn. Because JIS G3101 SS400 steel strips get through the side guide plate fast, the working face of side guide plate is seriously worn in the process of clamping SS400 carbon steel strips. And the side guide plate can not contact SS400 steel strips in the set position, resulting in movement of SS400 mild steel strips between the guide plates, the coiling is uneven. With the increasing of uneven coils, the wrong layer problem is generated.

2) The reason of the side guide plate detection component. The position sensor is replaced, and no position calibration, the error between the feedback position and actual position occur, then both side guide plates will not clamp SS400 carbon steel strips. Thus unable to activate the force control, and guide plate is always in the position control state when SS400 mild steel strips get through, resulting in wrong layer problem . In addition, the feedback error of actual pressure value will also cause to wrong layer problem of JIS G3101 SS400 hot rolled steel strips.

3) The problem of JIS G3101 SS400 hot rolled steel strips itself. This edge of SS400 steel strip is uneven, such as camber or waves appeared in the rolling process, will make the side guide plate bear large instantaneous stress. The side with force control regulation will open for the protection of the equipment, and it is away from the mild steel strip to reduce stress. Then JIS G3101 SS400 hot rolled steel strips move between the side guide plates without clamping, and lead to wrong layer problem.

4) The cause of the pinch roll. If both sides position of the pinch roll have too large deviation in coiling process, or the pinch roll put too large pressure on JIS G3101 SS400 hot rolled steel strips, it will generate wrong layer problem.

BBN steel is the professional to resolve various JIS G3101 SS400 hot rolled steel strips problems during production. Welcome to contact us to purchase and communicate JIS G3101 SS400 hot rolled steel.