Breakthrough in CNC Boring Technology for the Rod End of Agricultural Machinery Hydraulic Cylinders: Double Improvement in Precision and Efficiency

Recently, a agricultural machinery equipment manufacturing enterprise has overcome the difficult problem of precision machining of the rod head of the hydraulic cylinder. Through the customized CNC boring process, the tolerance of key dimensions is controlled within 0.015mm. This technology adopts a composite processing scheme of spiral milling and on-line detection, which has been applied to the suspension system of high-horsepower tractors, significantly improving the operational stability. "The core of CNC boring of the rod head of the hydraulic cylinder for agricultural machinery lies in dynamic compensation." The process engineer demonstrated the processing simulation animation. In traditional boring, it is easy for the dimensional tolerance to exceed the standard due to the deformation caused by the internal stress of the material. The new scheme uses a laser displacement sensor to monitor the change of the bore diameter in real time and automatically adjusts the feed rate. "This is equivalent to installing 'adaptive eyes' on the machine tool." In order to improve the processing efficiency, the team has developed a special tool library. For different materials such as No. 45 steel and alloy steel, diamond-coated tools and cooling schemes are matched, and the processing time for a single piece is shortened to 8 minutes. "The comprehensive efficiency has increased by 40%," the project leader introduced. The new process has also extended the tool life to 1,200 pieces per time by optimizing the chip removal path. An agricultural machinery cooperative has reported that when the hydraulic equipment with the new rod head is used for deep plowing operations, the response speed of the hydraulic cylinder has increased by 15%, and the wear amount of the oil seal has decreased by 30%. "Especially under long-term high-load working conditions, the stability has been significantly enhanced," the maintenance supervisor said. The equipment failure rate has been reduced to less than 0.5%. The enterprise has established a digital twin processing model, covering the parameters of the entire series of rod heads with a diameter range of φ20-φ150mm. The technical team revealed that they are developing an AI-based visual inspection system, which will be able to achieve real-time early warning of processing defects in the future. "This will promote the intelligent transformation of CNC boring of the rod head of the hydraulic cylinder for agricultural machinery." With the industrial application of this technology, the self-sufficiency rate of core components of high-end agricultural machinery in China is expected to exceed 75%, providing key technical support for the development of precision agricultural equipment.