The difference between rough cutting and fine cutting in the processing of precision mechanical parts

In the process of precision mechanical parts processing, the common processing methods are turning and milling parts, and some common precision parts are milling parts or turning parts. After the rough cutting of the workpiece, the entire workpiece is actually very close to the appearance and size required by the workpiece itself, but at this time there is still a large margin on the surface of the workpiece for fine cutting. The surface of the workpiece after the fine cutting treatment is more Smooth and clean, the size will be more accurate.
Under normal circumstances, the workpiece processed by precision mechanical parts can achieve the required appearance and size of the workpiece after one rough cutting and one fine cutting. However, not all workpieces only need to be cut once, and some parts of some workpieces may need to be rough cut multiple times. At the same time, there are also some workpieces whose accuracy requirements are not too high or the cutting amount is small, and it is also possible that only one fine cutting can meet the requirements of the workpiece.

Rough cutting in the machining of precision machinery parts requires a large cutting margin for the workpiece, so it needs to have a greater cutting force than the fine cutting. This requires the machine, the tool, and the workpiece to meet the requirements, and the rough cutting is It is possible to quickly remove the margin, and the surface performance after the effect cannot be too rough.

The precision cutting of precision mechanical parts processing is the surface performance of the workpiece, and the dimensional accuracy meets the requirements of the workpiece. Therefore, the tools required for the precision cutting also need to be very sharp, because the cutting amount is small, so the measurement The precision requirements are very high.

Actually, there are many parts that we can't see are inseparable from the processing of precision mechanical parts, such as the very small nuts in mobile phones, because these nuts are actually customized according to the needs of mobile phone manufacturers , There are almost no standards, and the precision requirements are very high, so almost all of them are produced by precision machining.