A common roll-shape defect in hot strip production of steel Coil tower. The main causes of the analysis of tower defects are as follows:
1 Raw material slab. The raw material slab has wedge shape, which is easy to cause the steel coil tower shape.Steel Coil
2 rolling process. 1 the side plate of the rolling Mill Inlet is inconsistent on both sides causing the rolling instability, and then causing the tower shape; 2 The roller wear is serious, especially the upper and lower roller wear inconsistent, resulting in rolling instability, and then caused by the tower shape; 3) roll gap is inconsistent, steel strips appear sickle bend, resulting in coiling defects. 3 Side guides. Side Guide plate openings through large or serious wear, side guide plate can not be pressed on both sides of the strip, the strip in the absence of a moderate side plate pressure, easy to the side of the operation, the forced alignment, will appear tower shape. 4 Clip Feed roller and roll. As a result of serious wear or installation is not standard, the pinch roller seam is not parallel and help roll roll seam is inconsistent, strip from the large side of the roll seam, resulting in a tower. 5 reel. Drum internal parts wear serious or drum shrink control improperly, drum up the volume is not up to the requirements, in the unloading process easy to cause the steel roll head tower. Therefore, the corresponding improvement measures are: 1 raw material slab. Ensure that the shape of the plate is not wedge-shaped and sickle-bend. At the same time, the heating should be even, to prevent large temperature difference between the slab. 2 Reasonable design roll type. 1 The reasonable design roll type is advantageous to enhances the coiling quality, fully utilizes the roll shape concave degree advantageous to the characteristic, at the same time, avoid too big to cause the cross section of the strip to become larger, the deformation of the plate is poor; 2. The coiling upper and lower clamping rollers are processed into the shape with edge chamfer, so that the clamping roller is more evenly worn to prevent the strip from running and improve the shape quality.Steel Coil
3 maintenance. 1) to regularly calibrate, to ensure that the pinch roller and roll roll on both sides of the roller joint, to prevent the running of steel strip; 2. When the side guide plate is calibrated, not only to ensure the position of the side guide plate accurate, but also to make the side of the guide plate movement consistent, to ensure that the movement of synchronization; 3) found wear should be replaced in a timely manner; 4) improve the detection accuracy of the tracking signal detection device to ensure that the roll and reel movements are normal and prevent
4 reasonable coiling speed system and tension system. On the basis of the calculation of coiling theory, the production practice is carried out to select the theory of coiling and the actual speed and tension value in production.Steel Coil
