For every workpiece, there will always be a technical machining deviation between the actual shape and the ideal theoretical shape. In the process of processing, the surface of the workpiece will be damaged more or less.

Surface roughness formation?

If you carefully observe the process of machining a part by a machine tool, you will notice that the surface of the part takes on a complex shape under the action of the blade and the machine tool. It is mostly composed of a series of peaks and troughs of different heights, depths and spacing. These peaks and troughs are very small, usually only a few nanometers to a few microns apart in height. The size of roughness is mainly due to the shape of the tool, feed speed, and speed caused by.

In addition, due to the periodic vibration of the machine during operation, periodic texture with slightly larger wavelength will be formed on the surface of the product, which is commonly referred to as corrugations.

The concept of surface roughness

Surface roughness refers to the roughness of the machined surface with small spacing and small peaks and valleys. The distance between the two peaks or troughs (wave distance) is very small (below 1mm), which belongs to the microscopic geometry error. Specifically, it refers to the degree of Z and spacing S of micro peaks and valleys.

Generally according to S points: S < 1mm for surface roughness

1≤S≤10mm indicates the ripple degree

If S > 10mm, the shape is f.