Northern Crop Shear: The “Precision Benchmark” for Steel Shearing

Northern Heavy Industries’ 5.5-meter cropping shear and cut-to-length shear are the “precision benchmark” in the steel rolling process. Leveraging a “rolling-cut design + intelligent control,” they significantly improve steel yields. During the steel rolling process, these shears must precisely cut steel billets to the specified length. Traditional flat-blade shears are prone to burrs and bends. This equipment, however, utilizes the cutting-edge rolling shearing principle. The upper and lower blades rotate and roll to shear the billets, achieving a shearing accuracy of 0.1 mm. It can shear large billets up to 80 mm thick and 5.5 meters wide. To enhance equipment stability, the hydraulic system utilizes an electro-hydraulic proportional valve + closed-loop control to adjust the shearing force in real time. It automatically adjusts pressure when billet hardness fluctuates to prevent blade breakage. The modular design divides the equipment into modules: the shearing unit, transmission unit, and control system. Failure of any module can be individually disassembled and replaced, reducing maintenance time from 72 hours to 12 hours and increasing equipment utilization by over 30%. Furthermore, the energy management system improves the equipment’s overall energy efficiency by 15% by optimizing operating parameters. In use at a large steel company, this equipment has increased the steel shearing qualification rate from 95% to 99.8%, reducing steel waste by over 1,000 tons annually. This provides strong support for cost reduction and efficiency improvement for the steel company and fills a gap in the domestic production of high-end shearing equipment in my country’s steel and metallurgical industry.