72results about How to "Avoid abnormal damage" patented technology

This invention discloses a method for matching rolls in the cutting hole field, belonging to the technical field of section steel rolling. It solves the technical problem that the upper and lower rolls are damaged due to collisions between the cutting edges during high-speed rotation. The method involves setting a first roll matching gap smaller than the cutting edge gap at both ends of the upper and lower rolls, and determining the diameters of both ends of the upper and lower rolls based on the first roll matching gap. The first roll matching gap is 0.5-2mm smaller than the cutting edge gap. When the upper or lower roll shifts during high-speed rotation, because the first roll matching gap is smaller than the cutting edge gap, the first roll matching gap of the upper and lower rolls will contact each other first, preventing collisions between the cutting edges and avoiding abnormal damage to critical positions such as the cutting edges.