What is the surface roughness of cnc machining?

The CNC machining center has a strong comprehensive processing capability. After the workpiece is clamped once, it can complete more processing contents and has higher processing accuracy. For medium and difficult to process batch workpieces, its efficiency can reach 5~10 times of that of ordinary equipment. In particular, it can complete processing that many ordinary equipment cannot complete. It is more suitable for single processing or small batch and multi variety production with complex shape and high accuracy requirements. What is the surface roughness of cnc machining?

CNC machining is generally about 3.2 for ordinary machine tools, and 1.6 for high-speed machines; Note that the tool and cutting parameters used in the processing shall be considered.

CNC machining

The surface roughness is generally formed by the processing method adopted and other factors, such as the friction between the tool and the part surface during CNC processing, the plastic deformation of the surface layer metal during chip separation, and the high-frequency vibration in the process system. Due to different CNC machining methods and workpiece materials, the depth, density, shape and texture of the traces left on the machining surface are different.

Surface roughness is closely related to the matching property, wear resistance, fatigue strength, contact stiffness, vibration and noise of mechanical parts, and has an important impact on the service life and reliability of mechanical products. However, among the basic roughness evaluation parameters, Ra is generally preferred. The smaller the Ra value, the smoother the surface.

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