Method for rolling rods and wires through negative tolerance

The invention relates to a method for rolling rods and wires through negative tolerance, and belongs to the technical field of pressure machining in the metallurgical engineering industry. The steel is put into a heating furnace to be subjected to heat treatment including preheating, heating and soaking; the steel subjected to heat treatment passes through a pinch roll and then is rolled into a to-be-cut steel bar; the to-be-cut reinforcing steel bar is subjected to flying shearing, the actual shearing length of the reinforcing steel bar is influenced by thermal expansion and cold contraction in the flying shearing process, and the actual shearing length L0 of the reinforcing steel bar is obtained through calculation. By adopting the method for rolling, the sizing rate of the cold flying shear is improved, the shearing precision is improved, and the finished product quality is improved. 本发明涉及一种负公差轧制棒线材的方法，属于冶金工程行业的压力加工技术领域。将钢材放入加热炉中进行预热、加热和均热的热处理；热处理后的钢材经过夹送辊后进行轧制成为待切钢筋；待切钢筋进行飞剪，飞剪过程中钢筋实际剪切的长度受热胀冷缩的影响，计算得到钢筋实