The common processing methods in the processing of precision mechanical parts are turning and milling. Some common precision parts are milling or turning parts. After the workpiece has been rough cut, 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 fine cutting is smoother and the size will be more accurate.
Under normal circumstances, the workpiece of 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 one cutting. Some parts of some workpieces may need multiple rough cutting. At the same time, some workpieces themselves do not require too high precision or the cutting amount is very small. It is also possible that only one fine cutting can meet the requirements of the workpiece.
Rough cutting in the processing of precision mechanical parts requires a large margin for the workpiece to be cut, so it needs to have a greater cutting force than fine cutting. This requires the machine, tool, and workpiece to meet the requirements, and rough cutting is to remove the margin as quickly as possible, and the surface performance after the effect cannot be too rough.
The finishing cutting of precision mechanical parts is to ensure that the surface performance and dimensional accuracy of the workpiece meet the requirements of the workpiece. Therefore, the tools needed for finishing cutting also need to be very sharp. Because the cutting amount is small, the measurement precision requirements are very high.
