Dimensional accuracy and influencing factors of precision forging parts

The unique shape defects of cold precision forgings during precision forging include: the axial bending of the positive extrusion, the drum shape of the outer circle of the reverse extrusion, the shape is unstable, and the height and size are greatly different. Under normal extrusion conditions, there are shortages, dents, and dead zones with almost no plastic deformation, resulting in cracks and other dimensional accuracy and shape defects unique to cold forging. The accuracy of precision forgings is affected by many factors such as raw materials, forging equipment, auxiliary tools, molds, lubrication, and production conditions. Firstly, Influence of die quality, The shape and size of the precision forging in the vertical direction of the centerline of the main shaft of the forging equipment are determined by the die cavity, so it is affected by the machining accuracy of the die, the thermal deformation of the precision forging and the die during precision forging, and its own elastic deformation. In addition, there are die deformation, plastic deformation of precision forgings and so on.

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