Understand the difference between rough cutting and fine cutting in precision machine parts processing.
The common processing method in the processing of precision machinery parts is turning and milling parts. Some common precision parts are milling parts or turning parts. After the workpiece in rough cutting, the whole workpiece is actually close to the appearance and size of the workpiece itself, but at this time there is still a large margin on the surface of the workpiece, to carry out fine cutting, after fine cutting processing of the workpiece surface smooth, size will be accurate.
In general, the workpiece can reach the required appearance and size after one rough cutting and one fine cutting. However, not every workpiece only needs 1 cut, some parts of some workpiece may need to carry out multiple rough cutting. At the same time, there are some workpiece itself accuracy requirements are not too high or the cutting amount is very small, but also may be able to achieve the requirements of the workpiece as long as after 1 time of fine cutting.
The rough cutting in processing because the workpiece needs to cut the allowance is large, so it needs to have a large cutting force than fine cutting, which requires the machine, the tool, the workpiece three can meet, and the rough cutting is able to quickly remove the allowance, and the surface performance after the action can not be too rough.
And fine cutting is the surface performance of the workpiece, and dimensional accuracy to meet the requirements of the workpiece, so fine cutting tools need to be sharp, because the cutting amount is small, so the measurement precision requirements are high.
In fact, there are a lot of the part that we can’t see with has an inseparable relationship precision machinery parts processing, such as mobile phone inside tiny nut, because these nuts are customized according to demand of mobile phone manufacturers, almost no standard, and the accuracy requirement is high, so almost all depends on the production of precision machining.