Mechanical parts processing factory said, surface roughness is a key performance index reflecting the deviation of the surface micro geometry of the parts, is the key basis for detecting the quality of the surface layer of the parts; whether it is selected effectively, immediately related to the quality of goods, service life and product cost. The selection of mechanical parts surface roughness There are three kinds of ways, namely, measurement method, experimental method and analogy method. In the mechanical parts design program work, the most general use is the analog method, this method is simple, fast and reasonable. The use of analogical method must have ample references, the current variety of mechanical structure design guidelines are given a more comprehensive range of materials and references. The most common is the surface roughness that corresponds to the tolerance level.
In general, the smaller the size tolerance requirements of mechanical parts, the smaller the surface roughness value of mechanical parts, but they will not have a fixed function of the relationship between them. For example, some equipment, instruments and equipment on the rocker, spindle and its health equipment, food machinery, some mechanical parts of the decorative surface, their surface requirements for production and processing is very smooth that is, the surface roughness requirements are very high, but the size tolerance requirements are very low. In general, there are size tolerance requirements of the parts, the tolerance level and surface roughness value in the middle or have a certain correspondence.
The above is to explain the choice of surface roughness of mechanical parts, hope to see can help you!