Roughness Mechanics Concept
In mechanics, roughness refers to the microscopic geometrical properties consisting of small spacings and peaks and valleys on a machined surface. It is one of the problems of interchangeability research. Surface roughness is generally formed by the processing method used and other factors, such as the friction between the tool and the surface of the part during processing, the plastic deformation of the surface metal when the chips are separated, and the high-frequency vibration in the process system. Due to different processing methods and workpiece materials, the depth, density, shape and texture of marks left on the machined surface are different. Surface roughness is closely related to the matching properties, 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.
Roughness Representation
After the surface of the part is processed, it looks smooth, but it is uneven after magnification. Surface roughness refers to the micro-geometric features composed of small distances and tiny peaks and valleys on the surface of the processed part, which are generally formed by the processing method and (or) other factors. The function of the surface of the part is different, and the required surface roughness parameter value is also different. The surface roughness code (symbol) should be marked on the part drawing to describe the surface characteristics that must be achieved after the surface is completed.