Typical Precision Forging Technology
Precision forging refers to the forming technology that meets the dimensional accuracy requirements of parts with minimal or no further processing after forging and forming. There are two main ways to achieve precision forging: refining the blank, that is, directly forging the blank that meets the requirements of precision machining. Precision forging refers to the process of directly processing the entire or some parts of a component using precision forging technology, thereby reducing the amount of machining required. There are many precision forging processes currently used in production. According to different forming temperatures, it can be divided into hot precision forging, cold precision forging, warm precision forging, composite precision forging, etc.
1. Hot precision forging process
Hot precision forging refers to the precision forging process that is carried out above the recrystallization temperature. Due to the high deformation temperature, the material has low deformation resistance and good plasticity during forging, making it easy to form parts with complex geometric shapes.
2. Cold precision forging process
Cold precision forging process is a precision forging forming technology that is forged at room temperature. Due to room temperature forming, size errors caused by thermal expansion and contraction are avoided, making it easier to control the shape and size of workpieces in cold precision forging. At the same time, the forging surface does not produce oxidation or burn damage, and has high surface quality. Therefore, the forging accuracy of hot precision forging and warm precision forging is lower than that of cold precision forging.
3. Warm precision forging process
Warm forging is a precision forging technique that heats metal to a suitable temperature below the recrystallization temperature for forging. It has the advantages of both hot forging and cold forging while avoiding their defects, effectively reducing the load on equipment and molds, improving the plasticity and flowability of metals, and eliminating the need for forging annealing.
4. Composite precision forging process.
The composite precision forging process is a forging technique that combines cold, warm, and hot forging processes to complete the forging of a workpiece. It can take advantage of the advantages of cold, warm, and hot forging and avoid the disadvantages of cold, warm, and hot forging. The mechanical properties, dimensional accuracy, and surface quality of parts produced using composite precision forging technology are improved compared to parts produced using single forging technology. The commonly used composite precision forging processes currently include warm forging cold finishing, hot forging cold forging, warm extrusion cold rolling, warm precision forging cold extrusion, and hot precision forging cold rolling.