Industrial high pressure valves Surface roughness refers to the small spacing and small peak-valley roughness of the machined surface. The distance between two peaks or two valleys (wave distance) is very small (below 1 mm), which is difficult to distinguish with naked eyes. Therefore, the surface roughness belongs to the micro geometric error. The smaller the surface roughness is, the smoother the surface will be. Surface roughness has a great influence on the performance of mechanical parts.
Surface roughness has a great influence on the use of parts. Generally speaking, the surface roughness value is small, which will improve the quality of matching, reduce wear and prolong the service life of parts, but the processing cost of parts will increase. Therefore, the surface roughness value should be selected correctly and reasonably. In the design of parts, the choice of surface roughness value is determined by the role of parts in the machine.
The main reasons for the formation of surface roughness are as follows:
1) Tool marks in the process of processing;
2) Plastic deformation during cutting separation;
3) Friction between knife and machined surface;
4) High frequency vibration of process system.