Error and force deformation in ring forging

Error and force deformation in ring forging
The formation of surface roughness of ring forging includes geometric factors related to the tool. Then, what are the technological factors and improvement measures that affect the surface quality of ring forgings when forging plant processes ring forgings, and what are the stresses and deformation in the process of ring forgings?

The cutting amount and feed amount have great influence on the surface roughness, and the cutting speed has great influence on the surface roughness. When processing plastic materials, if the medium speed cutting, easy to form chip agglomeration, increase the surface roughness. When cutting at high or low speed, less surface roughness can be obtained. Due to the influence of tool geometry, properly increasing the front Angle, the tool is easy to cut into ring forgings, smooth chip removal, plastic deformation is small, can reduce the surface roughness value. But if the front Angle is too large, the blade will tend to be embedded in the ring forging, increasing the surface roughness. The increase of the rear cutter face Angle reduces the friction between the back cutter face and the machined surface, and reduces the surface roughness of ring forgings. But the back Angle is too large, which reduces the strength of the blade and is easy to vibrate. Under the influence of ring forging material, the larger the plasticity of ring forging material, the rougher the surface after cutting. Plastic material in the process of processing deformation is very large, and the knife has a strong bonding effect. On the contrary, brittle materials tend to obtain smaller surface roughness values. Coolant effect, the use of coolant can effectively reduce the surface roughness value. Steel is usually tempered or normalized before cutting. The coolant reduces friction between the tool and the ring forgings, reduces the temperature of the cutting zone, reduces plastic deformation, and inhibits chip accumulation and oxide skin generation.

The stress deformation of ring forgings is usually caused by the slight deformation of the position and shape of the ring forgings due to the stress deformation of the system in the actual operation of the forging plant, which seriously affects the normal operation and life reduction of ring forgings. To explore the reasons, we found that there are two main factors. The actual operation strength of the central forgings in the production process is higher. In the actual operation process of the system, tools, fixtures and other small parts used for processing ring forgings to bear high intensity workload, a long time is easy to cause relative position displacement or force deformation. Ring forgings face many forces. During the operation of the system, the components of the system not only bear the working force imposed by the system itself, but also bear the relative force imposed by the parts being processed, and bear the friction between the components. Hot deformation of ring forgings in the process of machining In fact, the processing system in the process of operation, not only will be affected by a variety of forces, but also by other factors. Specifically, it is the thermal deformation, including the thermal deformation of the tool, the thermal deformation of the ring forging, the thermal deformation of the machine tool itself and its components. Thermal deformation refers to the deformation of the system due to heat. The precise geometric and kinematical relations between cutting tools and ring forgings will be seriously damaged, and the machining accuracy of ring forgings will be seriously affected.

this is open die forgings produced by tongxin precision forging company