How to improve surface roughness in precision parts processing?

The process factors that affect surface roughness in precision parts processing mainly include cutting amount, tool geometric parameters, etc. If you want to improve, you need to start from these aspects:
1. Cutting amount
The greater the feed, the higher the residual area height and the rougher the surface of the part. Therefore, reducing the feed amount can effectively reduce the surface roughness value.
Cutting speed also has a great influence on surface roughness. When cutting elasto-plastic materials at medium speeds, since nodules are easily generated and plastic deformation is large, the surface roughness of the processed parts is large. Usually, low-speed or high-speed cutting of elastic-plastic materials can effectively avoid the generation of built-up edge, which has a positive effect on reducing the surface roughness value.
2. Tool geometric parameters
In the processing of precision parts, the main declination angle, secondary declination angle and tool tip arc radius have a direct impact on the surface roughness of the part. When the feed amount is constant, reducing the main and secondary deflection angles or increasing the tool tip arc radius can reduce the surface roughness value. In addition, appropriately increasing the rake angle and relief angle can reduce cutting deformation and friction between the front and rear blade surfaces, inhibit the generation of built-up chips, and also reduce the surface roughness value.
After solving these problems, the problem of surface roughness can be greatly reduced.