Roller guide for rolling mill import, taking into account the stability of the rolling stock, selecting a roller inlet with good stability

The application of the forced wide-opening hole type in the production of the elastic flat steel is forced to form a wide-opening hole shape; the two-pass forced wide-opening hole forming, the pressing amount is small, and it is more stable. Since the 6H rolling mill is the first one after the 2# enclosure, considering the twisting and biting direction of the rolling stock, the forced wide-opening hole type is not suitable for the sixth frame. The more mature technology can be put into the seventh or eighth frame. Because the forced wide-opening hole type is unevenly deformed, the requirements for the guide are very high. After that, it is decided to use a forming process to select the hole type on the 7# rolling mill, so that the roll strength and the motor power can meet the process requirements, and the number is reduced. Guide reserve. Considering that the rolling stock will run off and the convex part is prone to cracking, etc., the final hole size is shown in the upper face type II.

Due to the uneven deformation, the rolled piece is prone to deviation, and the grooved hole type is easy to produce the ear, so the hole type is not the first. Considering the stability of the rolled piece, the hole type is modified after analysis, and the curved hole is changed to a flat bottom convex hole without a groove; although it can also be grooved, the width of the flat portion on both sides should be larger than the 6# rolling mill. The width of the rolled piece is reduced, which can reduce the first processing amount of the new roll and improve the utilization rate of the roll. In order to avoid the scratching of the rolled parts, in order to avoid scratches, the 7# rolling mill is imported with roller guides, and the roller inlets with good stability are selected in consideration of the stability of the rolled stock.

Attention in the production process: The inlet of the frame where the wide-opening hole type is forced must be installed firmly, otherwise the rolled piece will run off and it will not be able to enter the next rolling mill smoothly. For the forced wide-width hole type, the front part is required to be high, and the head of the rolled piece is the best. When the head is bent, the groove can be produced by the groove, that is, the forced wide-open hole type is adjusted according to the bending direction of the rolling head. Import, ensure that the center of the rolling stock is as close as possible to the center of the wide-opening hole type. The width of the rolling stock is mainly controlled by the frame of the forced wide-opening hole type. Pay attention to the wear and stability of the hole type during production. The adjustment of the reduction of the rolling mill has the greatest influence on the width of the rolling mill.